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J* E* C* N* U* N* S* 2014 Vol.2014 Please wait a minute... For Selected: Download Citations EndNote Ris BibTeX Toggle Thumbnails Select Decompositions for a class of 5×5 separable quantum states HUANG Xiao-fen Journal of East China Normal University(Natural Sc    2014, 2014 (1): 1-8.   Abstract （1272）      PDF（pc） （182KB）（2323）       Knowledge map    Save This paper studied certain quantum states for which the PPT criterion was both sufficient and necessary for separability. A class of 5×5, bipartite mixed states was prestented and the conditions of PPT for these states were derived. The separable pure state decompositions of these states were explicitly constructed when they were PPT, so we can judge a class of states entangled or not by this method. Reference | Related Articles | Metrics | Comments（0） Select On chromatic number of { 2K1+K2 , C4 }-free graphs DUAN Fang, ZHANG Wei-juan Journal of East China Normal University(Natural Sc    2014, 2014 (1): 9-12.   Abstract （1412）      PDF（pc） （156KB）（2180）       Knowledge map    Save In this paper, the structural characterization of { 2K1+K2 , C4 }-free graphs was given according to their independence numbers, and the linear upper bound on chromatic number of { 2K1+K2 , C4 }-free graphs was obtained in terms of their clique number. Reference | Related Articles | Metrics | Comments（0） Select Vulnerable European option pricing with the time-dependent for double jump-diffusion process LYU Li-juan, ZHANG Xing-yong Journal of East China Normal University(Natural Sc    2014, 2014 (1): 13-20, 26.   Abstract （1686）      PDF（pc） （728KB）（2289）       Knowledge map    Save Based on Merton's structured credit risk model, derivatives pricing with rival unilateral default risk was studied in this paper. Assuming that underlying asset price and assets-liabilities of sellers follow double jump-diffusion process, where risk-free interest rate $r(t)$, volatility of asset $\sigma(t)$ and dividend yield $d(t)$ are time-dependent, vulnerable European options pricing model under double jump-diffusion process was established using the structured method, the analytical expressions of options price was obtained using It\^{o} lemma and the trunformation of the equivalent martingale measure. Reference | Related Articles | Metrics | Comments（0） Select Relations between solutions of two classes of  differential equations with entire function coefficients and functions of small growth SUN Gui-rong Journal of East China Normal University(Natural Sc    2014, 2014 (1): 21-26.   Abstract （1625）      PDF（pc） （251KB）（2284）       Knowledge map    Save This paper was devoted to studying two classes of second order linear  differential equations with entire function coefficients by using the   value distribution theory. The relations between functions of small growth and the solutions of the equations, as well as, their 1st and 2nd derivatives investigated. The results improve some previous works. Reference | Related Articles | Metrics | Comments（0） Select Lower diameter estimate for a special quasi-almost-Einstein metric HU Ling-juan, MAO Jing-jing, WANG Lin-feng Journal of East China Normal University(Natural Sc    2014, 2014 (1): 27-35.   Abstract （1418）      PDF（pc） （194KB）（2078）       Knowledge map    Save The weighted Myers' theorem gives an upper bound estimate for the diameter of a complete Riemannian manifold with the $\tau$-Bakry-\'{E}mery curvature bounded from below by a positive number. The lower bound estimate for the diameter of a compact manifold is also an interesting question. In this paper, a gradient estimate for the potential function of a special $\tau$-quasi-almost-Einstein metric was established by using the Hopf's maximum principle. Based on it, a lower bound estimate for the diameter of this metric was derived. The result generalizes Wang's lower diameter estimate for compact $\tau$-quasi-Einstein metrics. Reference | Related Articles | Metrics | Comments（0） Select Determining the topology of real intersection of algebraic surfaces GAO Ben, CHEN Yu-fu Journal of East China Normal University(Natural Sc    2014, 2014 (1): 36-46.   Abstract （1232）      PDF（pc） （405KB）（2238）       Knowledge map    Save This paper gave an algorithm for computing in an efficient way the topology of the real intersection of algebraic surfaces, which are defined by a finite family of trivariate polynomials with coefficients in $\R$. The algorithm is based on the computation of the graphs which are the intersection of at most two projections. For this purpose, some conditions, which be obtained by some linearly change of coordinates were fultiued, and some methods for checking these conditions were presented. Reference | Related Articles | Metrics | Comments（0） Select Public-key encryption and certificate-based encryption from lattice LI Jun, QIAN Hai-feng, LI Xiang-xue Journal of East China Normal University(Natural Sc    2014, 2014 (1): 47-59.   Abstract （1998）      PDF（pc） （851KB）（2172）       Knowledge map    Save Certificate-based encryption (CBE) combines the advantages of identity-based encryption and that of public key infrastructure. However, CBE based on traditional mathematical assumptions cannot defeat quantum attacks. This paper aims at constructing a lattice-based CBE which is post-quantum: First constructed a lattice-based public key encryption (PKE); then used this PKE to construct a lattice-based CBE. Finally, it was proved that the ciphertexts generated by our CBE are indistinguishable from random against chosen-plaintext attacks (namely, INDr-CBE-CPA secure) by assuming that the learning with errors (LWE) problem is hard. This scheme is the first known lattice-based CBE so far. Reference | Related Articles | Metrics | Comments（0） Select Belongingness of Chinese dialect speech recognition based on deep neural network JING Ya-peng, ZHENG Jun, HU Wen-xin Journal of East China Normal University(Natural Sc    2014, 2014 (1): 60-67.   Abstract （2185）      PDF（pc） （1319KB）（4216）       Knowledge map    Save Based on the modified QuickNet software, we proposed a supervised DNN layerwise pre-training method for dialect speech recognition. The pre-training will start from a 3-layer neural network till the maximum layer, during which we will do supervised training. The initial weights of a new layer are composed of the partial trained weights of lower level network and the randomized weights closed to the output layer. Then we will do traditional back-propagation training when the initial weights of the maximum layer network are obtained. This method achieved a relatively higher recognition rate compared with normal neural network training and can be used in mobile speech recognition apps, the recognition of dialects speech and so on. Reference | Related Articles | Metrics | Comments（0） Select Impact of the Beijing-Shanghai high-speed rail on the spatial pattern of the regional road accessibility JIANG Hai-bing, ZHANG Wen-zhong, LI Ye-jin Journal of East China Normal University(Natural Sc    2014, 2014 (1): 68-78, 89.   Abstract （1949）      PDF（pc） （4018KB）（2244）       Knowledge map    Save This paper discussed the spatial differentiation of the road accessibility  under 〖JP2〗the effect of Beijing-Shanghai high-speed rail (HSR). Firstly measured accessibility changes in the spatial distribution of four different accessibility indicators, computed and mapped using a GIS support. The accessibility maps described both the possible benefits and their spatial distribution of the region. Subsequently measured the transport equity by calculating a set of inequality indices of the accessibility distribution and estimated whether the disparities in regional accessibility are increased after the implementation of the HSR. Finally we applied the GIS based technique to calculate the service population scale of every station. The results showed that the HSR obviously improve the overall road accessibility level, reducing greatly total travel time among the central cities. However, it leads to more polarized accessibility patterns of the spatial development which indicated that various regions obtain unbalanced accessibility gain from the HSR, establishing “island” or “corridor” spatial patterns with the highest lever accessibility which replaces the “ellipse concentric circle” shape of road accessibility spatial structure. In addition, the HSR contributes to enlarging the service market demarcation and broadening regional labor markets of main central cities along the line in short time distances and promote many urban agglomerations to facilitate co-operation. Moreover, the HSR stations become the rapid traffic network nodes and the hub of the social and economic activities. Reference | Related Articles | Metrics | Comments（0） Select Effects of typhoon disturbance on the litter production in an evergreen broad-leaved forest in the Tiantong, Zhejiang WANG Zhang-hua, WANG Xi-hua, SHEN Guo-chun Journal of East China Normal University(Natural Sc    2014, 2014 (1): 79-89.   Abstract （2108）      PDF（pc） （1907KB）（2258）       Knowledge map    Save To understand the effects of typhoon disturbance on the production, composition, temporal dynamics of litter in subtropical evergreen broad-leaved forest, a 5-year study from January 2008 to December 2012 on two types of evergreen forests, C. fargesii community and S. superba community, in Tiantong, Zhejiang, was carried out. Average annual litterfall are 6.465 t·hm-2 and 6.947 t·hm-2 in C. fargesii community and S. superba community, respectively. Annual litter production and monthly litterfall in typhoon season were both significantly higher in typhoon years than that in normal years. Orders of proportions of different sorts litterfall in the two types of communities are leaves > twigs >detritus >flowers >barks. The total leaves production accounted for about 70% of total litter. Proportion of twigs reached about 17%. Proportion of leaves declined from typhoon years to normal years, while the proportion of twigs had an opposite trend. The dynamics of monthly litter production in both communities followed a bimodal distribution (with peaks in April-May and October-November) in normal years, and trimodal distribution (with an extra peak in typhoon season.) in typhoon years. The dynamic of monthly leaves production was different between the two types of communities in different typhoon years. It had two peaks in C. fargesii community and had three peaks in S. superba community in the years (2008, 2009 and 2011) with weak typhoon disturbance. However, it showed three peaks in both communities in the year (2012) with strong typhoon disturbance. These results suggested that typhoon disturbance can change the dynamics of litterfall in subtropical evergreen forest, and these impactions may various in different types of communities under different strengths of typhoon. Reference | Related Articles | Metrics | Comments（0） Select Characteristics of sediment load and runoff in the upper, middle and lower reaches of the Yangtze River and their relationship WANG Yi-bin, LI Jiu-fa, ZHAO Jun-kai, YAO Hong-yi, GUO Xiao-bin, CHEN Wei Journal of East China Normal University(Natural Sc    2014, 2014 (1): 90-98.   Abstract （2406）      PDF（pc） （2722KB）（2821）       Knowledge map    Save The related data from Yichang, Hankou and Datong gauging stations were collected from 1950—2010 to analyze the characteristics of temporal and spatial variations of the runoff and suspended sediment load in different reaches of the Yangtze River. Multi-year average of runoff (1951—2010) were 4.32×1011 m3, 7.07×1011 m3 and 8.96×1011 m3 at Yichang, Hankou and Datong gauging station, respectively. The runoff from the upper reaches of the Yangtze River was as much as that from the middle and lower reaches. Multi-year average runoff was fluctuant with no significant trend, but the difference of runoff between flood season and drought season was minimized by the construction of the Three Gorges Dam. On the other hand, multi-year average of suspended sediment load at Yichang Hankou and Datong gauging station were 4.34×108 t, 3.59×108 t and 3.90×108 t, respectively, indicating that the main sources of suspend sediment was the upper reaches of Yangtze River. With the decline of suspended sediment load since 1980s, especially in the flood seasons, the suspended sediment load at Yichang, Hankou and Datong gauging station decreased respectively by 0.54×108 t, 1.17×108 t and 1.52×108 t. Because of the resuspension of sediment in riverbed and river shoal and the sediment supply from the lakes along the Yangtze River, the decreases in the suspended sediment load of different grain size levels were unequal. A good linear relation was found between the suspended sediment load with grain size larger than 0.1 mm and runoff while the linear relation was weaken with the finer of grain size. This was in line with the relative theories of river dynamics. The dispersion grew up from the upper reaches to the lower reaches. This study is very helpful to understand the recent changes in the relationship between the runoff and suspended sediment load under human interventions. Reference | Related Articles | Metrics | Comments（0） Select Variation of particulate amino acid in the Suzhou River and the Huangpu River in Shanghai SHEN Bing-liang, CUI Ying, ZHU Zhuo-yi, WU Ying Journal of East China Normal University(Natural Sc    2014, 2014 (1): 99-106.   Abstract （1697）      PDF（pc） （1695KB）（2260）       Knowledge map    Save Surface particulate samples were collected quarterly in 2007 from four sampling points of Suzhou River and Huangpu River for particulate amino acids (PAA) analysis. The comparison among the four sampling sites were made for general parameters (such as particulate organic carbon (POC), particulate organic nitrogen (PON)) and particulate state amino acid parameters (D and L amino acid and degradation index). The results showed that the amino acid changed more dramatically in Suzhou River. Inferred from the variations of Degradation Index (DI), the source of the particulate amino acids in July is the freshest in the both rivers. A good negative correlation relationship between D-Amino acid and DI suggests the variation of bacteria-derived D-AA during the degradation process. Reference | Related Articles | Metrics | Comments（0） Select Comparative study on the adaptability of Alnus trabeculosa and Phragmites australis in tidal wetland ZHANG Hai-yan, WANG Tian-hui, LU Jian-jian Journal of East China Normal University(Natural Sc    2014, 2014 (1): 107-115, 122.   Abstract （1556）      PDF（pc） （2696KB）（2095）       Knowledge map    Save Self-designed experimental mesocosm for semidiurnal tidal simulation was used to compare the effect of different submergence time on photosynthesis process and physiological characteristics of Alnus trabeculosa and native species (Phragmites australis). The results showed that A. trabeculosa and P. australis have similar decreasing tendency in Stomatal conductance (Gs), Net photosynthetic rate (Pn) and Transpiration rate (Tr) with increasing submergence time; however, the water use efficiency (WUE) of these two species showed the tendency of first increased and then decreased, suggesting that the increasing submergence time promoted the WUE of A. trabeculosa and P. australis in some degree. With daily submergence time increasing, POD activity and MDA content of A. trabeculosa decreased and increased, respectively; POD activity of P. australis first increased and then decreased; however, MDA content of P. australis hasn’t significant difference. A. trabeculosa showed the similar tolerance to the periodic inundation of tidal wetland, which suggests that A. trabeculosa can be also used to construct ecological engineering in Chongxi wetland. Reference | Related Articles | Metrics | Comments（0） Select ATR-Chk1-Cdc25 involved in the regulation of Dictyostelium discoideum during G2/M cell cycle CHENG Xiao-feng, HOU Lian-sheng Journal of East China Normal University(Natural Sc    2014, 2014 (1): 116-122.   Abstract （1876）      PDF（pc） （1207KB）（1629）       Knowledge map    Save The cell proliferation of wild type KAx-3 and mutant type RNAi-allC observed by light microscope and cell counting, The latter was divided 8 time faste than the former. To evaluate the reason why RNAi-allC cell cycle shortened, the function of ATR-Chk1-Cdc25 signaling pathway were explored by quantitative PCR and western blot techniques. The results showed the differences of ATR, Chk1, Cdc25 in mRNA contents and protein level existed in KAx-3 and RNAi-allC cells, that is, the expression of ATR and Chk1 ratio of RNAi-allC to KAx-3 was 0.69〖DK〗∶1 and 0.1〖DK〗∶1 respectively; the expression of Cdc25 in RNAi-allC cells was 8 times that of KAx-3 cells. The data suggested that once the expression of ATR had little change, Chk1 and Cdc25 expression changed greatly. Western blotting results were consistent with Q-PCR reports. The Chk1 protein contents were significantly less in mutant type RNAi-allC than that in KAx-3cells; the Cdc25 protein contents were higher in RNAi-allC cells. The above mentioned results suggest that ATR-Chk1-Cdc25 signaling pathway involved in the regulation of the G2/M phase in Dictyostelium discoideum. Reference | Related Articles | Metrics | Comments（0） Select Novel derivative of xanomeline, SBG-PK-014, increases the α-secretion of APPsw WANG Dong, ZHOU Zong-li, GAO Hong, LEI Xiao-ping,DONG Su-zhen, HU Jin-feng Journal of East China Normal University(Natural Sc    2014, 2014 (1): 123-132.   Abstract （1735）      PDF（pc） （2613KB）（2087）       Knowledge map    Save The activity of a novel derivative of xanomeline, SBG-PK-014, on muscarinic M1 mAChRs and the α-secretion of human APP Swedish mutant (APPsw) was evaluated. The EC50 and maximum folds of activation (FAmax) were measured in a cell-based model. Mouse N2a cells over-expressing both APPsw and M1 mAChR gene were treated with SBG-PK-014 and xanomeline, respectively. Their secreation levels of sAPPα were then measured using Western Blotting. The results showed that SBG-PK-014 had a similar EC50 to xanomeline (40.2 nmol/L vs. 28.4 nmol/L), but demonstrated a 3.5-fold FAmax, as compared to xanomeline. SBG-PK-014 promoted the α-secretion of APPsw via the activation of M1 receptors. At the same dose of 0.1 μmol/L and 1 μmol/L, SBG-PK-014 exhibited significantly more potent activity. SBG-PK-014 activated M1 receptors more effectively than xanomeline, increased the α-cut of APPsw as well as the secretion of neuroprotective sAPPα, showed potential in modifying the Aβ pathology of Alzheimer’s disease (AD), and is worth further development. Reference | Related Articles | Metrics | Comments（0） Select EcR-RNAi and azadirachtin treatments induced the abnormal proleg development in Spodoptera litura. ZHAO Jin-cheng, WU Tian-min, LIU Li-hua, WANG Yang, HE Lin Journal of East China Normal University(Natural Sc    2014, 2014 (1): 133-142.   Abstract （1420）      PDF（pc） （2182KB）（3133）       Knowledge map    Save Ecdysone is the insect molting hormone which induces a series of events critical for ecdysis, beginning with the formation of a complex between ecdysteroid receptor (EcR) and its partner protein, ultraspiracle (Usp). We cloned a 600~bp partial cDNAs encoding 200 amino acids EcR protein by degenerate primers from the common cutworm, \textit{Spodoptera litura}, a destructive agricultural pest insect in East Asia. We used this fragment to design the EcR-dsRNA to interfere the corresponding gene to analysis the change in different development stages. Using the Azadirachtin (Az) feeding the RNAi injected larvae to observe the development difference with normal control. Results indicated that the EcR RNAi interference the normal ecdysis and result in incomplete pupal molt. In the Az treatment after EcR RNAi injection, the larvae stunt growth and development program were disturbed and observed abnormal proleg phenotype. We deduced that Az and EcR RNAi maybe influence the key genes and inhibit the ecdysone cascade modulate pathway, which result in the disorder of tissue remodeling in molting. Reference | Related Articles | Metrics | Comments（0） Select Construction of learning analytics system MA Xiao-ling, XING Wan-li, FENG Xiang, WU Yong-he Journal of East China Normal University(Natural Sc    2014, 2014 (2): 1-19, 39.   Abstract （2884）      PDF（pc） （5978KB）（3617）       Knowledge map    Save Learning Analytics (LA) has been applied to various learning environments. However, a complete and clear learning data system is needed. This study tried to provide an open and comprehensive LA system. Firstly, summary of recent researches and developments in this field was given, a number of important concepts were defined, and the interaction evolution of time, space and data of LAS was studied. Then the learning analysis system Universe of Discourse (LASUoD) including formalized modeling of LAS information space model ［ΣR,ΣCR,ΣMT,ΣA,ΣW,ΣC］ was analyzed. In order to achieve interoperability of LAS applications, the frame of learning analytics system ontology (LASO), data format of LA object and the profiles of LAS standards were proposed. Finally an LA application based on open source SAKAI was demonstrated. Reference | Related Articles | Metrics | Comments（0） Select Learning analytics system architecture based on big data technologies FENG Xiang， YU Ming-hua， MA Xiao-ling, WU Yong-he Journal of East China Normal University(Natural Sc    2014, 2014 (2): 20-29.   Abstract （2949）      PDF（pc） （3106KB）（3399）       Knowledge map    Save First, this paper analyzed the demand and object of learning analytics in the e-Education. Then it introduced the technology of big data, designed learning analytics platform based on Hadoop, built intelligent digital education services supporting platform based on learning analytics, and illustrated the application cases of this technology scheme. Finally, the technical problems of Hadoop which still exist was pointed out, and their solutions was put forward. Reference | Related Articles | Metrics | Comments（0） Select Analysis of the “cross-bridge of people in cyber learning space” system in cloud architecture model ZHANG Shi-ming, XU He-xiang, QIAN Dong-ming,CHEN Hai-jian, HUANG He-xiao Journal of East China Normal University(Natural Sc    2014, 2014 (2): 30-39.   Abstract （1795）      PDF（pc） （3422KB）（2124）       Knowledge map    Save The“cross-bridge of people in cyber learning space”system proposed to construct by Ministry of Education of China is an important element of the deep integration of information technology and education. Based on Shanghai “Three Access Two Platforms”, through the years of practice, using the popular cloud service architecture model, this paper proposes the goal of building the system of  the“cross-bridge of people in cyber learning space”for Shanghai basic education service, including the top-level design and planning of the system. Then explore its practice in Shanghai. Finally, by benefit analysis, it shows that the system can not only achieve a high degree integration for information technology and education, reaching the 6A vision of education information, but also promote to form a new educational industrial economy, promoting economic restructuring, increasing contribution to GDP through education services, and gaining cost savings and environment friendly. Reference | Related Articles | Metrics | Comments（0） Select Research status and development studies of motion sensing technology ZHANG Shi-chao, QIAN Dong-ming Journal of East China Normal University(Natural Sc    2014, 2014 (2): 40-49, 126.   Abstract （2634）      PDF（pc） （1021KB）（6254）       Knowledge map    Save This thesis introduced the basic concepts and development of the human-computer interaction technology, as well as its applications in education and related areas. On this basis, Kinect would be used as a case study, including its application in the data of the depth, and skeleton tracking. Reference | Related Articles | Metrics | Comments（0） Select Usability testing and analysis of the intelligent educational publishing platform management system LIU Ming-zhuo， ZHAO Na， WU Yong-he Journal of East China Normal University(Natural Sc    2014, 2014 (2): 50-59.   Abstract （1530）      PDF（pc） （2913KB）（2480）       Knowledge map    Save Firstly, this paper discussed the software related usability concepts. Secondly, it takes the "Smart Educational Publishing Platform Management System" supported by the Shanghai Science and Technology Committee  as a research case to show how usability testing methods are applied in the research and development process of software respectively from the testing background, goal, tool, methods, the participants and testing procedure; during the research, using the method-thinking aloud and eye tracking for data collection and analysis; also this paper discusses the findings from the aspects-user satisfaction, errors rate, easy to learn, effectiveness, and efficiency. Lastly it gives the summary and prospect. Reference | Related Articles | Metrics | Comments（0） Select Research on design and application scenarios of smart learning environment for vocational education XU Xian-long, QIAN Dong-ming, WU Yong-he, SU Xiao-bing, ZHU Zhi-ting Journal of East China Normal University(Natural Sc    2014, 2014 (2): 60-69, 145.   Abstract （2070）      PDF（pc） （2856KB）（2278）       Knowledge map    Save Smart learning environment for vocational education (SLEVE) has laid a foundation for reforming learning and teaching methods in this area. Firstly, promotion of new technology for vocational education was described in this paper, and new technology classification for vocational education application was proposed. Secondly, system requirements, functional requirements and technical requirements of SLEVE were analyzed in detail. Thirdly, new technology supporting for SLEVE construction was analyzed, and technical plan of SLEVE constructionbased on new technology was designed. Finally, application procedure of SLEVE was given, and main application scenarios of SLEVE were analyzed, including individual self-study, classroom teaching, experiment teaching, training center, internships and public places. Reference | Related Articles | Metrics | Comments（0） Select Standards, key technologies and applications innovation of e-Textbook and e-Schoolbag WU Yong-he， HE Chao, YANG Ying, MA Xiao-ling， YU Yun-tao， LIU Xiao-dan, ZHU Zhi-ting Journal of East China Normal University(Natural Sc    2014, 2014 (2): 70-86.   Abstract （2324）      PDF（pc） （2857KB）（2180）       Knowledge map    Save Since e-Textbook and e-Schoolbag have been developed to a new stage, there is a bottleneck that has to be solved. This paper elaborates e-Textbook and e-Schoolbag research framework based on analysing the relationship between the standard, technology and application of e-Schoolbag and the relationship between systems, standards and technologies of e-Schoolbag from stakeholder’s perspectives firstly. Then this paper studies standards of e-Schoolbag from aspects of analysing current standard research status, standard systems, standard profiles and so on. Secondly, by analyzing the current key technology research status,this research parse the key technologies of e-Schoolbag from aspects of terminal key technologies, content key technologies, learning tools key technologies, learning services key technologies and technologies of integration innovation. Finally, this paper explores the e-Schoolbag education application from innovative ways of education, industrial development innovation, education application of innovative and educational theory innovation. Reference | Related Articles | Metrics | Comments（0） Select 3D virtual learning systems and educational gaming:  possibilities for e-Textbook 2.0 J. M. LAFFEY Journal of East China Normal University(Natural Sc    2014, 2014 (2): 87-97.   Abstract （1536）      PDF（pc） （451KB）（1892）       Knowledge map    Save There are great efforts underway to improve education through defining, designing and implementing e-Textbooks. There are also substantial efforts in the research and development of 3-dimensional virtual learning environments (3D VLE) and educational gaming. This paper explores the potential of developing a new form of e-Textbook, let us call it e-Textbook 2.0, based on advancing technologies for 3D virtual learning and on designing to meet pedagogical objectives using game mechanisms and strategies. These exciting new developments are then used to argue the potential for envisioning a framework for e-Textbooks 2.0 based on 3D VLE and educational gaming. The article attempts to make the case for increased focus on how to make curriculum subjects be the subject of game play, and for designing environments and games so that learning is visible and analytics can be used to provide feedback to the teacher and the students. Reference | Related Articles | Metrics | Comments（0） Select E-Textbooks in a digital ecosystem for learning C. WESTON Journal of East China Normal University(Natural Sc    2014, 2014 (2): 98-115.   Abstract （1426）      PDF（pc） （2142KB）（1756）       Knowledge map    Save The ISO/IEC project has so far used an online survey to discover what stakeholders across the world perceive to be the particular challenges that will be faced when technologies originally developed for commercial e-Books are transferred for use in formal education. This paper reflects on some of the key findings of this ISO/IEC work. Mr Weston argues that education is fundamentally about interactivity and not just about the dissemination of information. If follows that while commercial e-Books are viable as stand-alone products, e-Textbooks need to be embedded within a wider digital ecosystem for learning, an ecosystem that will comprise many different forms of software, delivering interactivity, reporting on the outcomes of that interactivity, profiling the capabilities of individual students and managing their progression. For e-Textbooks to play a full part in such an ecosystem, it is vital that they support open standards for interoperability. Reference | Related Articles | Metrics | Comments（0） Select Application design of e-Schoolbag based on PLE HU Hai-ming, WU Yong-he Journal of East China Normal University(Natural Sc    2014, 2014 (2): 116-126.   Abstract （2009）      PDF（pc） （3817KB）（1889）       Knowledge map    Save With rapid development of learning technology, e-Schoolbag has received more concerns from the domain of educational technology and the whole education. This paper studied design methodology of the framework of services based on PLE, and gave out its reference architect. Hence it proposed the e-Schoolbag design framework via PLE, and the framework and approaches of various services. Finally it gave out design methodology of learning center and its clients. This methodology can facilitate the learning design of e-Schoolbag. Reference | Related Articles | Metrics | Comments（0） Select Standardising future formats of digital textbooks: A framework for mapping international stakeholders’ positions and context T. HOEL, YUAN Li, P. BAKER Journal of East China Normal University(Natural Sc    2014, 2014 (2): 127-136.   Abstract （1653）      PDF（pc） （1190KB）（1483）       Knowledge map    Save The technical foundation under digital textbooks is still shaky as the exchange format is still being developed while new e-Textbooks are brought to the market and being tested. This paper constructs a framework to help conversations about the requirements and development of an e-Textbook format to support learning, education and training. The development will go through idea, specification and implementation stages, and the framework details factors in the standards development settings and in the implementation settings. A model for a constructive discourse about future e-Textbook formats is developed based on an evaluation framework of the value of e-Textbook and an e-Textbook lifecycle model. Reference | Related Articles | Metrics | Comments（0） Select Interoperable global standard for “smart” e-Textbooks B. MCCOY Journal of East China Normal University(Natural Sc    2014, 2014 (2): 137-145.   Abstract （1205）      PDF（pc） （264KB）（1826）       Knowledge map    Save This paper reviews high-level requirements for digital learning content and the overall situation of e-Learning platforms to contextualize an overview of the status and adoption of EPUB 3 as an ICT standard for interoperable digital publications. The paper concludes with a review of recent and anticipated future developments for EPUB 3 and the overall Open Web Platform relative to emerging requirements for “smart” e-Textbooks and other education-oriented content. Reference | Related Articles | Metrics | Comments（0） Select Research on e-Textbook DRM and system implementation based on Marlin GE Xin, QU Jin, GU jie, WANG Chang-jie Journal of East China Normal University(Natural Sc    2014, 2014 (2): 146-156, 178.   Abstract （1812）      PDF（pc） （1856KB）（2173）       Knowledge map    Save With the development of e-Textbook, Digital Rights Maragement (DRM) is needed urgently. In this paper, the e-Textbook specific requirements on DRM are analyzed, and then a DRM solution is designed based on Marlin DRM SDK. A demo system is developed and the result show that the current solution can provide DRM protection to e-Textbook, while at the same time satisfied with different requirements in this new area. Reference | Related Articles | Metrics | Comments（0） Select Design and development of standards of virtual learning tools in e-Schoolbag LEI Yun-he, YU Xiao-hua, WU Yong-he，ZHU Zhi-ting Journal of East China Normal University(Natural Sc    2014, 2014 (2): 157-166.   Abstract （1521）      PDF（pc） （2424KB）（1794）       Knowledge map    Save Virtual learning tools are one of the essential motivators to deepen the application of e-Schoolbag. This paper contrasts and analyzes the relative research on learning tools and standards, then abstracts the basic theoretical frames of the two standards of them. After consulting with the members of Group of Virtual Learning Tools, combined with interviews with the specialists in the field, the classification with glossaries and the Metadata Model of virtual learning tools are formed. What’s more, the design of the other three standards including the assembly, the testing and the configuration of virtual learning tools are introduced and explained briefly. Reference | Related Articles | Metrics | Comments（0） Select Evaluation framework EFI for measuring the impact of learning, education and training C. M. STRACKE Journal of East China Normal University(Natural Sc    2014, 2014 (2): 167-178.   Abstract （1402）      PDF（pc） （3863KB）（1967）       Knowledge map    Save This article introduces the Evaluation Framework EFI for the Impact Measurement of learning, education and training: The Evaluation Framework for Impact Measurement was developed for specifying the evaluation phase and its objectives and tasks within the IDEAL Reference Model for the introduction and optimization of quality development within learning, education and training. First, a description of the Evaluation Framework for Impact Measurement will be provided, followed by a brief overview of the IDEAL Reference Model. Finally, an example for the implementation of the Evaluation Framework for Impact Measurement within the ARISTOTELE project is presented. Reference | Related Articles | Metrics | Comments（0） Select Thomassen and coloring graphs on surfaces REN Han, CHAO Fu-gang Journal of East China Normal University(Natural Sc    2014, 2014 (3): 1-7, 39.   Abstract （1764）      PDF（pc） （380KB）（2451）       Knowledge map    Save The research of coloring graphs on surfaces originated from Heawood map color theorem. With an analysis based on the primary source, we survey the work of Thomassen, such as three color theorem and list coloring, coloring graphs on surfaces, and chromatic polynomial and number of colorings. His work  has been concerned by many mathematicians, such as Mohar, Thomas and Hutchinson. Reference | Related Articles | Metrics | Comments（0） Select Perpetual American straddle option CEN Yuan-jun, YI Fa-huai Journal of East China Normal University(Natural Sc    2014, 2014 (3): 8-13.   Abstract （1443）      PDF（pc） （169KB）（2519）       Knowledge map    Save By appplying the comparison principle for the variational inequality, we analyzed the behavior of exercise boundaries for the perpetual American straddle option. We found that it is a free boundary problem. Different from the standard perpetual American option, it has two exercise boundary points with dividends and only one free boundary point without dividends. These results can be understood very well from the financial point of view. We will present a rigorous mathematical proof, and find the bounds of exercise boundaries for the American straddle option with finite expiry. Reference | Related Articles | Metrics | Comments（0） Select Long range dependence of Shanghai stock market and pricing of European option XU Lin, XU Ting Journal of East China Normal University(Natural Sc    2014, 2014 (3): 14-22.   Abstract （1281）      PDF（pc） （451KB）（2061）       Knowledge map    Save This paper aims at the empirical statistical test of the long range dependence of Shanghai Composite Index and finishes statistical modeling for corresponding financial data and derives the valuation formula for European call option under the model we proposed. Theoretical analysis and numerical examples are given to illustrate the impact of the long range dependence on the option pricing by comparing the option valuation formula under fractional Brownian motion (fBm for short) model and the one under Black-Scholes model. The main statistics we adopted are R/S and modified R/S statistics. Numerical results show that the valuation formula under fBm are much more stable than the one under Black-Scholes model due to the former one has the long range dependence property. Reference | Related Articles | Metrics | Comments（0） Select Representation theorem for AVaR under a submodular capacity TIAN De-jian, JIANG Long, JI Rong-lin Journal of East China Normal University(Natural Sc    2014, 2014 (3): 23-29.   Abstract （1413）      PDF（pc） （184KB）（2298）       Knowledge map    Save From the viewpoints of quantile functions, we gave the definition of AVaR of financial positions under a capacity. Then, using the classical results of AVaR under the probability measure, we established the representation theorem for AVaR under the submodular capacity. As a byproduct of this representation theorem, we proved that AVaR under a submodular capacity is a coherent risk measure, which generalized the classical results. Reference | Related Articles | Metrics | Comments（0） Select Boundary value problem for a coupled system of fractional differential equations with p-Laplacian operator at resonance CHENG Ling-ling, LIU Wen-bin, YE Qing-qing Journal of East China Normal University(Natural Sc    2014, 2014 (3): 30-39.   Abstract （1689）      PDF（pc） （293KB）（1938）       Knowledge map    Save This paper gave the existence  theorem of solutions with dim Ker M = 2 by the extension of Mawhin's continuation theorem due to Ge, where M is a  quasi-linear operator. And an example to illustrate the theorem was also given. Reference | Related Articles | Metrics | Comments（0） Select List edge and list total coloring of triangle-free 1-planar graphs SONG Wen-yao, MIAO Lian-ying, ZHANG Shu-jie Journal of East China Normal University(Natural Sc    2014, 2014 (3): 40-44.   Abstract （1355）      PDF（pc） （175KB）（2115）       Knowledge map    Save A graph is 1-planar if it can be drawn on the plane so that each edge is crossed by at most one other edge. In this paper, it was proved that every triangle-free 1-planar graph $G$ with maximum degree $\Delta\geqslant15$ can be $\Delta$-edge-choosable and ($\Delta$+1)-total -choosable. Reference | Related Articles | Metrics | Comments（0） Select An integral-type operator from the minimal Mobius invariant space into the Bloch type space ZHAO Xian-hao, LIANG Yu-xia Journal of East China Normal University(Natural Sc    2014, 2014 (3): 45-50，59.   Abstract （1124）      PDF（pc） （342KB）（1771）       Knowledge map    Save By using analysis methods and constructing test functions we obtained some new equivalent conditions for the boundedness and compactness of the integral-type operator $C_\varphi ^g $ from the minimal M$\ddot{\rm o}$bius invariant space into the Bloch-type space. These equivalent conditions give perfect characterizations of $C_\varphi ^g $, which also provide good reference for the study of other integral-type operators. Reference | Related Articles | Metrics | Comments（0） Select Oscillation and asymptotic behaviors for third-order delay dynamic equations on time scales ZHANG Xiao-jian, YANG Jia-shan Journal of East China Normal University(Natural Sc    2014, 2014 (3): 51-59.   Abstract （1651）      PDF（pc） （301KB）（2095）       Knowledge map    Save The oscillation for certain third-order nonlinear variable delay dynamic equations on time scales was discussed in this article. By using the generalized Riccati transformation and a lot of inequality techniques, we established some new sufficient conditions which ensure that every solution of the equations either oscillates or converges to zero. The results extend and improve some known results. Examples were given to illustrate the main results. Reference | Related Articles | Metrics | Comments（0） Select On strongly power-serieswise McCoy rings WANG Wen-kang Journal of East China Normal University(Natural Sc    2014, 2014 (3): 60-76.   Abstract （1321）      PDF（pc） （233KB）（2232）       Knowledge map    Save In this paper, we introduce strongly power-serieswise McCoy rings, which are a generalization of power-serieswise McCoy rings and strongly McCoy rings, and investigate their properties. Let R be a ring and I an ideal of R such that I is reduced, we show that if R/I is strongly  power-serieswise McCoy(resp., power-serieswise McCoy), then R is strongly power-serieswise McCoy(resp., power-serieswise McCoy). A ring R is power-serieswise McCoy if and only if R[x] is power-serieswise McCoy. We find that a class of strongly power-serieswise McCoy  rings of upper triangular matrix ring over strongly  power-serieswise McCoy  rings. Meanwhile, we show that power-serieswise Armendariz rings and reduced rings are strongly power-serieswise McCoy rings. Reference | Related Articles | Metrics | Comments（0）