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25 November 2015, Volume 2015 Issue 6 Previous Issue    Next Issue

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Drafts origin structure analysis of the Journal of East China Normal University (Nature Science) based on the citation statistics in the past 10 years Li-Wan-Hui, ZHANG Jing, LI Yi, LIN Lei 2015, 2015 (6):  4-10.  doi: 10.3969/j.issn.1000-5641.2015.06.002 Abstract ( 878 )   PDF (1351KB) ( 891 )   Save Based on the data from the Chinese Citation Database of CNKI，the publications and citations of the Journal of East China Normal University (Nature Science) during 2005—2014 were analyzed. The results show that: (1) The citation amounts vary greatly among different disciplines. For example, mathematics articles are published most but cited least. The average citation rate of Earth Science is the highest. The publications of some disciplines are decreasing, including Geography and Statistics with high average citation rate, and Physics, Chemistry, Electronic and Communication with low average citation rate. (2) The highly cited articles come from Life Science and Earth Science. (3) The reviews, special issues and columns are very beneficial to enhance the influence of the Journal. (4) The articles from outside school or Englishlanguage are cited very lowly, especially about Mathematics. And, (5)  the citations of the articles will reach a peak after 4 or 5 years. Then, some conclusions, which can provide the basis to make the drafts origin structure more reasonable, are obtained. References | Related Articles | Metrics

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A class of dually flat Finsler metrics SONG Wei-Dong, LIU Feng 2015, 2015 (6):  11-17.  Abstract ( 644 )   PDF (178KB) ( 1201 )   Save Finsler geometry is just Riemannian geometry without quadratic restriction, and we know that the projectively flat and dually flat Finsler metrics are two of important problems in Finsler geometry. In this paper, we study a class of Finsler metrics with 3 parameters in the form $F=\alpha+\beta$, where $\alpha(x,y)=\frac{\sqrt{\kappa^2{\langle x,y\rangle}^2+\varepsilon{\mid y\mid}^2(1+\zeta{\mid x\mid}^2)}}{1+\zeta{\mid x\mid}^2}$ and $\beta(x,y)=\frac{\kappa\langle x,y\rangle}{1+\zeta{\mid x\mid}^2}$.By using the Hamel's equations and dually flat equations, the necessary and sufficient conditions for the Finsler metrics to be projectively flat and dually flat are obtained. Related Articles | Metrics

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Semi-weighted finite difference schemes for one dimensiona fractional advection-dispersion equations ZHU Lin, RUI Hong-Xing 2015, 2015 (6):  18-29.  Abstract ( 646 )   PDF (228KB) ( 1127 )   Save A series of semi-weighted implicit finite difference schemes for solving one-dimensional fractional advection-dispersion equations with variable coefficients on a finite domain are considered in this paper. The schemes are proved  unconditionally stable and second-order accuracy in spatial grid size for the problem with order of fractional derivative belonging to $[(\sqrt{17}-1)/2,2].$ Numerical examples are provided to verify the theoretical analysis. References | Related Articles | Metrics

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d-strong total colorings of cycles when 35<=d<=55 HUANG Xiao-Jia, CHEN Xiang-恩, WANG Zhi-Wen 2015, 2015 (6):  30-35.  Abstract ( 674 )   PDF (194KB) ( 929 )   Save For a proper total coloring of a graph G=(V,E), thepalette C(v) of a vertex v\in V is the set of the colors of the edges incident with v and the color of the vertex itself. If C(u)\neq C(v), then the two vertices u and v of G are said to be distinguished by the total coloring. A d-strong total coloring of G is a proper total coloring that distinguishes all pairs of verticeu and vwith distance 1\leq d_{G}(u,v)\leq d. The d-strong total chromatic number chi^{''}_{d}(G) of Gis the minimum number of colors of a d-strong total coloring ofG. In this paper we determine \chi^{''}_{d}(C_{n}) completely for cycles where d\in [35,55]$ and $d\in \textbf{N References | Related Articles | Metrics

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A new adaptive penalty function in the application of genetic algorithm CAI Hai-Luan, GUO Xue-Ping 2015, 2015 (6):  36-45.  doi: 10.3969/j.issn.1000-5641.2015.06.006 Abstract ( 1251 )   PDF (493KB) ( 1156 )   Save Penalty function is one of the most commonly used method in genetic algorithm (GA) to solve nonlinear constraint optimization problems. For traditional penalty functions, it is always not easy to control penalty factors. In this paper we presenta new adaptive penalty function with simpler construction and prove its convergence.Then based on this adaptive penalty function we present a new genetic algorithm, which can make populations quickly access to feasible regions and improve local search capacity of genetic algorithms. Theoretical analysis and simulation results show that this algorithm has stronger stability and better convergence but needs less parameters than other ones. References | Related Articles | Metrics

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New transformation for the partial sum of a cubic q-series WANG Chen-Ying 2015, 2015 (6):  46-52.  doi: 10.3969/j.issn.1000-5641.2015.06.007 Abstract ( 857 )   PDF (191KB) ( 1046 )   Save The partial sum of a cubic basic hypergeometric series is investigated by means of the modified Abel's lemma on summation by parts. A new transformation formula for the cubic series is established, which expands some known cubic q-series summation formulae. References | Related Articles | Metrics

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Ambrosetti-Prodi type results of the nonlinear first-order periodic problem MA Lu-Yi 2015, 2015 (6):  53-58.  doi: 10.3969/j.issn.1000-5641.2015.06.008 Abstract ( 724 )   PDF (247KB) ( 975 )   Save This paper shows the relationship between the parameter~s~and the number of solutions of the first-order periodic problem \left\{\!\!\!\begin{array}{ll}  u'(t)=a(t)g(u(t))u(t)-b(t)f(u(t))+s,~~\ \ \ t\in {\mathbb{R}},\\[2ex]  u(t)=u(t+T)\end{array}\right.\eqno  where a\in C({\mathbb{R}},[0,\infty)),~b\inC({\mathbb{R}},(0,\infty)) are T-periodic, \int_0^T a(t){\rm d}t>0; f, g\in C({\mathbb{R}},[0,\infty)), and f(u)>0 foru>0, 0<l\leqslant g(u)<L<\infty for u\geqslant0. By using the method of upper and lower solutions and topological degree techniques, we prove that there exists s_{1}\in{\mathbb{R}}, such that the problem has zero, at least one or at least two periodicsolutions when  s<s_{1}, s=s_{1}, s>s_{1}, respectively. References | Related Articles | Metrics

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Extension of the Laplace decomposition method and its application LI Heng-Da, LIU Yin-Ping 2015, 2015 (6):  59-71.  doi: 10.3969/j.issn.1000-5641.2015.06.009 Abstract ( 887 )   PDF (2566KB) ( 1197 )   Save The Adomian decomposition method was simple and widely used in solving nonlinear differential equations. The convergence region of the Adomian series solution is always very limited.Therefore the Laplace decomposition method, which is a combination of Laplace transformation method and Adomian decomposition method,is proposed to solve initial boundary value problems. In this paper,the Laplace decomposition method is extended to solve nonlinear partial differential equations. For the flaws of the directlyextended algorithm, we further proposed a modified algorithm to solve nonlinear partial differential equations. Take, for example,1+1 dimensional nonlinear evolution equation to expound the idea and procedure of the algorithm. Finally, several examples were given to demonstrate the high precision and large convergence region of the new solutions by comparing these new solutions with those Adomian series solutions as well as other known exact solutions. Related Articles | Metrics

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Global stability of a discrete tuberculosis model CHEN Hui, LI Liang-Chen 2015, 2015 (6):  72-80.  doi: 10.3969/j.issn.1000-5641.2015.06.010 Abstract ( 835 )   PDF (348KB) ( 935 )   Save In this paper, a discrete tuberculosis model is investigated. By means of calculating the next generation matrix'sspectral radius, we derive the reproduction number $R_0 $ of themodel. The solutions of the model are bounded and positive, whichcan be verified through the relation theory of the differenceequation. It is proved that $R_0 =1$ is a threshold to determine thedisease extincation or persistence. The disease-free equilibrium isglobal asymptotically stable when the reproduction number $R_0 <1$.The endemic equilibrium is global asymptotically stable when the reproduction number $R_0 >1$ Related Articles | Metrics

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High sensitive room temperature hydrogen sensor based on Pd/SiNWs/pSi structure ZHU Li-Si, Yang-Ting, ZHANG Jian 2015, 2015 (6):  81-89.  doi: 10.3969/j.issn.1000-5641.2015.06.011 Abstract ( 918 )   PDF (4118KB) ( 1099 )   Save Silicon nanowires (SiNWs) coated by palladium layer via electroless plating technique had been prepared. And the Pd/SiNWs Schottky barrier hydrogen sensors capable of operating at room temperature for the first time were conducted. Scanning electron microscopy (SEM) analysis showed that Pd thin films composed of nanoparticles were coated on the silicon nanowire surface. The 〖WTBX〗IV〖WTBZ〗 curves of Pd/SiNWs Schottky barrier hydrogen sensor were measured. The results indicated that under room temperature the sensor can sense hydrogen in a wide range of concentration. The sensing mechanism of the Pd/SiNWs barrier hydrogen sensor was also provided. The sensor developed had great potentials for the detection of hydrogen at room temperature and can be used in the cases like fuel cells application. References | Related Articles | Metrics

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Boundary theory of soft switching and minimum dead-time design for LLC resonant converter ZHANG Li-Sheng 2015, 2015 (6):  90-100.  doi: 10.3969/j.issn.1000-5641.2015.06.012 Abstract ( 1173 )   PDF (1156KB) ( 1320 )   Save LLC resonant converter is widely used in switched mode power supplies. However, the present research on conditions of realizing soft switching and the design of dead time has obvious shortcomings. Therefore, the soft switching of LLC resonant converter is studied, and the soft switching boundary theory is proposed based on the precise equivalent model during the dead-time interval. According to the balance between the supplying charge during the dead-time and the required charge, together with the length relationship between the dead-time and the zero-crossing time of resonant current, the operation region of the converter can be divided into one soft switching operation region and three hard switching operation region, and the boundary curve of soft switching is concluded. The minimum dead-time for realizing soft switching even under the worst case is analyzed, and the mathematical equation of the minimum dead-time is derived. Finally, a 300 W prototype is build, and the accuracy of the theory is verified by the accordance between the theoretical design and the experimental results. Related Articles | Metrics

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Properties of the bound magnetopolaron in a triangular quantum well ZHANG Jian-Feng, DAN Shu-Ping 2015, 2015 (6):  101-107.  doi: 10.3969/j.issn.1000-5641.2015.06.013 Abstract ( 703 )   PDF (283KB) ( 1391 )   Save The properties of the bound magnetopolaron in a triangular quantum well were investigated within Lee-Low-Pines(LLP) variational method. At different Coulomb bound potentials, the ground state energy and the ground state binding energy were obtained as functions of the cyclotron resonance frequency of magnetic field and the electron areal density. The results showed that the ground state energy was found to increase with the electron areal density and the cyclotron resonance frequency of the magnetic field, whereas the ground state binding energy was found to decrease with them. Related Articles | Metrics

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Effects of curcumin on oxidative stress status and thefunctions of astrocytes in the brain of aged rats ZHANG Pan, YU Bin, LIU Sha, DUAN Ya-Le, ZHAO Zheng 2015, 2015 (6):  108-116.  doi: 10.3969/j.issn.1000-5641.2015.06.014 Abstract ( 811 )   PDF (1625KB) ( 1261 )   Save The change of oxidative balance and astrocyte in the cortex and hippocampus of aged SD rats were investigated by Western blotting, enzyme assay, immunofluorescence and HPLCMS. The data showed that curcumin reduced the level of MDA and 8OHdG and enhanced the level of GSH and GCS activity, which indicated that curcumin inhibited the oxidative damage in the brian; the detection of the level of glial fibrillary acidic protein (GFAP) indicated curcumin inhibited the excessive activation of astrocytes and also the results of the activity of GS, the level of GDNF and Dserine showed that curcumin improved the function of astrocytes. References | Related Articles | Metrics

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Application of ionexchange resin method on the observation of wet nitrogen deposition fluxes inside and outside Tiantong forest LI Dan-Dan, SU Yu-Qin, ZHOU Tao-Ye, ZHENG Ze-Mei, WANG Xi-Hua 2015, 2015 (6):  117-125.  doi: 10.3969/j.issn.1000-5641.2015.06.015 Abstract ( 876 )   PDF (1966KB) ( 1284 )   Save The fluxes of wet nitrogen deposition inside and outside Tiantong forest were observed for 2 years (from March 2011 to February 2013), basing on Ionexchange resin method, to examine the composition and the seasonal dynamics of wet nitrogen deposition in Tiantong forest. The results showed that: (1) The monthly fluxes of nitrate nitrogen inside and outside forest were 0.22~3.73 kg·N/(hm2·month) and 0.13~2.85 kg·N/(hm2·month), respectively, which both had higher fluxes in autumn and winter, while lower fluxes in summer. The 〖JP3〗monthly fluxes of ammonium nitrogen inside and outside forest were 0.17~1.35 kg·N/(hm2·month) 〖JP〗and 0.21~1.44 kg·N/(hm2·month), respectively. The monthly fluxes of ammonium nitrogen were lower in spring than in other seasons. (2)The nitrate nitrogen deposition fluxes were lower than ammonium nitrogen deposition fluxes in spring and summer, while higher in autumn and winter. Moreover, the average ratio of nitrate nitrogen to ammonium nitrogen was 0.9, whatever inside and outside forest. (3) The wet nitrogen deposition fluxes were higher in autumn and winter inside and outside forest, respectively, resulted from the influences of monsoon climate, typhoons in summer and the farming activities in Tiantong region.(4) The annual wet nitrogen deposition fluxes inside and outside forest were 18.86 kg·N/(hm2·a) and 17.51 kg·N/(hm2·a), respectively. References | Related Articles | Metrics

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Study on spatiotemporal distribution of students’activities on e-campus LIU Zhen, ZHOU Jing, ZHAO Zi-Ying 2015, 2015 (6):  126-133.  doi: 10.3969/j.issn.1000-5641.2015.06.016 Abstract ( 762 )   PDF (3423KB) ( 1901 )   Save While the continuous development of information technology and its wide application to higher education have deeply impacted the patterns of student learning and campus activities, resource allocation and teaching mode innovation have become the focus of higher education. Based on a sample of student volunteers from a research university in China, this study employed GPS and Wifipositioning technologies, supplemented with log information from the campus information system, to study the spatiotemporal distribution of campus activities such as those in the classrooms, dorms and the stadium, by gender and across grades. The study also discussed possible causes for the different activity patterns as well as the usage of campus facilities. The results of this study revealed that the spatial distribution of campus resources appeared decentralized. In detail, student campus activities and learning sites became diversified. Students tended to choose the proximate facilities and sites for study and other oncampus activities, resulting in the decline in the use of traditional learning sites （e.g. libraries and classrooms）. These results provided recommendations for campus resource allocation, university BI and the data collection for smartcampus. References | Related Articles | Metrics

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Research of SaaSbased MIS scheme design WANG Qian-Yi, 欧Yang-Rong-Bin , LONG Xin-Zheng 2015, 2015 (6):  134-142.  doi: 10.3969/j.issn.1000-5641.2015.06.017 Abstract ( 709 )   PDF (3332KB) ( 1137 )   Save In order to improve the information construction of Peking University and facilitate the steps of each department,this paper presents a multitenantoriented SaaS solution by analyzing the requirements. It discusses the extendable multilayer application framework and focuses on three key technologies, which are multilayer data storage model, multitenantoriented IAAA access control strategy and configuration/deployment methodology. References | Related Articles | Metrics

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Accessibility evaluation on college portal websitesbased on WCAG 2.0 LIU Huan, WU Min-Yu, CHEN Jian-Xiang, LIU Chang, LU Bei-Rong 2015, 2015 (6):  143-151.  doi: 10.3969/j.issn.1000-5641.2015.06.018 Abstract ( 769 )   PDF (656KB) ( 830 )   Save In recent years, more and more attention has been drawn to the construction of portal websites in colleges. In order to improve the college portal websites, the accessibility of the websites should be strongly concerned. Through a survey of 60 college portal websites in China, this research tries to provide an overview of the accessibility of Chinese college portal websites based on Web Content Accessibility Guidelines 2.0 (WCAG). The results indicate that none of the surveyed college portal websites meets the accessibility requirements of WCAG 2.0. Similar problems occur among different levels of college portal websites, and noncompliance errors within the guidelines are highly concentrated. The main accessibility problems are: (1) using images without text alternatives; (2) leaving language of pages undefined; (3) leaving input elements unlabeled; (4) lacking keyboard control. Finally, several valuable recommendations are made based on the research findings. References | Related Articles | Metrics

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Analysis of “food design” trends from the perspective of food material science MA Yong-Lei 2015, 2015 (6):  152-159.  doi: 10.3969/j.issn.1000-5641.2015.06.019 Abstract ( 757 )   PDF (1169KB) ( 1247 )   Save This paper discussed the important global issues related to food raw materials and resources and explained the basic concepts and research scope of the "Food Design". We analyzed the characteristics, strengths and limitations of natural food raw material as the design material. Then the global consumer trends in food industry,development and rational utilization of new food materials and resources as well as how these two aspects influences "Food Design" trends were discussed. Finally we concluded that future designers need to ponder the global food materials for sustainable development, taking into account three dimensions: society, economy and environment. References | Related Articles | Metrics

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Study on adaptable design of outdoor products for elders in modern city LIU Fei 2015, 2015 (6):  160-169.  doi: 10.3969/j.issn.1000-5641.2015.06.020 Abstract ( 939 )   PDF (3014KB) ( 1075 )   Save Improving the adaptability of elders in urban living environment via design of outdoor products is an important research topic in the design field. The design of outdoor products is based on multidisciplinary research, such as the ergonomics, sociology, physiology and psychology research of elders. Therefore, the adaptable design should base on the real life state of elders, combining with the considerations of the individual difference, then improve the adaptability of elders in modern city using scientific method.  References | Related Articles | Metrics

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Typological analysis of “Prototype” of the traditional waterfront architecture MA Li, CHEN Yuan, LI Qi 2015, 2015 (6):  170-178.  doi: 10.3969/j.issn.1000-5641.2015.06.021 Abstract ( 1044 )   PDF (5076KB) ( 1152 )   Save On the basis of  architecture typology theory, we explore the waterfront building layout and space in “Prototype”. We conduct a field trip research on Fengjing water town in the Jiangnan district, with empirical analysis the impact of “Prototype” due to natural conditions in South of Yangtze River. We analyze and verify  the continuous space section presented as the main features of waterfront space by using visualized approaches. References | Related Articles | Metrics

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Spacetime evolution for mid21st century water resources over the BeijingHangzhou Grand Canal under the IPCC_A1B scenario XIA Hai-Bin, LE Qun- 2015, 2015 (6):  179-189.  doi: 10.3969/j.issn.1000-5641.2015.06.022 Abstract ( 839 )   PDF (5986KB) ( 1524 )   Save With the successful application for the list of the World Heritage, the renaissance and activation of the BeijingHangzhou Grand Canal has become a focus, of which, the key is utilization and distribution of water resources of watershed along the Grand Canal. This article adopts the A1B scenario of IPCC in order to simulate space and time distribution of precipitation as well as its evolution characteristics both in Chinese modern times (later 20th century, represented by 1981-2000 twenty years’ annual mean value) and future times (middle 21th century, represented by 2041-2060 twenty years’ annual mean value). This scenario simulation aims to analyze the spacetimechange characteristics of water resources of the Grand Canal. It reveals that from north to south, the volume of water resources of the Yangtze River Valley will decrease, while that of Huaihe River Valley will increase significantly. And that of the Huanghe River Valley and the Haihe River Valley will rise up slightly. Therefore, it concludes that the key of navigationof the GrandCanal is to use as early as possible the water resources of the Huaihe River Valley to transfer water resources in the south valley of Huanghe River to the north valley, and achieve navigation of the Grand Canal in the north of Huanghe Valley as well as to restore the “diversion works in Nanwang” and “Northern five Lakes Reservoir” in the context of “SouthtoNorth Water Diversion Project” so that the GrandCanal world heritage could be preserved.  References | Related Articles | Metrics