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How commercial involvement affects open source projects:three case studies on issue reporting

Science China(Information Sciences) 2013年第8期56卷 153-165页

作者： ma xiujuan ZHOU MingHui RIEHLE Dirk School of Electronics Engineering and Computer Science Peking University Key Laboratory of High Confidence Software Technologies Ministry of Education Friedrich-Alexander-University of Erlangen-Nurnberg

Whereas most research on Internetware has focused on new technologies for keeping track of a changing Internet,little attention has been paid to the software development process.A large portion of the software running the Internet is open source *** source software is developed both by volunteers and commercial companies,often *** get involved in open source projects for commercial reasons,and bring with them a commercial software development ***,it is important to understand how commercial involvement affects the software development process of open source *** article presents case studies of three open source application servers that are being developed jointly by a volunteer community and one primary software *** are interested in better understanding developer behavior,specifically task distribution and performance,based on whether the developer is an external contributor,e.g.,a volunteer working in their spare time,or a commercial developer from inside the primary backing company who is being paid for their *** achieve this,we look at issue reporting as an example of commercial involvement in open source *** particular,we investigate the distribution of tasks among volunteers and commercial developers by studying the source of reported issues and quantify the task performance on user experience via the issue resolution *** construct measures based on historical records in issue tracking *** results show that,with intensified commercial involvement,the majority of issue reporting tasks would be undertaken by commercial developers,and issue resolution time would be reduced,implying a better user *** hope our methods and results provide practical insights for designing an efficient hybrid development process in the Internetware environment.

关键词： open source software development commercial involvement hybrid development contributor participation issue reporting

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Synergic catalytic effect of Ti hydride and Nb nanoparticles for improving hydrogenation and dehydrogenation kinetics of Mg-based nanocomposite

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Progress in Natural Science:materials International 2017年第1期27卷 99-104页

作者： xiujuan ma Xiubo Xie Peng Liu Li Xu Tong Liu Key Laboratory of Aerospace materials and Performance (Ministry of Education) School of Materials Science and Engineering Beihang University State Grid Smart Grid Research Institute Future Science and Technology City Changping

The Mg-9.3 wt%(TiH;-TiH)-0.7 wt% Nb nanocomposite has been synthesized by hydrogen plasma-metal reaction（HPMR） approach to enhance the hydrogen sorption kinetics of Mg at moderate temperatures by providing nanosizing effect of increasing H "diffusion channels" and adding transition metallic catalysts. The Mg nanoparticles（NPs） were in hexagonal shape range from 50 to 350 nm and the average size of the NPs was 177 nm. The small spherical TiH;, TiH and Nb NPs of about 25 nm uniformly decorated on the surface of the big Mg NPs. The Mg-TiH;-TiH-Nb nanocomposite could quickly absorb 5.6 wt% H;within 5 min at 573 K and 4.5 wt% H;within 5 min at 523 K, whereas the pure Mg prepared by HPMR could only absorb 4 and 1.5 wt% H;at the same temperatures. TiH;, TiH and Nb NPs transformed into TiH;and Nb H during hydrogenation and recovered after dehydrogenation process. The apparent activation energies of the nanocomposite for hydrogenation and dehydrogenation were 45.0 and 50.7 kJ mol;, which are much smaller than those of pure Mg NPs, 123.8 and 127.7 kJ mol;. The improved sorption kinetics of the Mg-based nanocomposite at moderate temperatures and the small activation energy can be interpreted by the nanostructure of Mg and the synergic catalytic effects of Ti hydrides and Nb NPs.

关键词： magnesium Nanocomposite Catalytic effect Hydrogen storage

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MUTUAL ARTIFICIAL BEE COLONY ALGORITHM FOR MOLECULAR DOCKING

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International Journal of Biomathematics 2013年第6期6卷 17-27页

作者： RUIXIN ma xiujuan XU LEI ZHAO REN CAO QIANG FANG School of Software Dalian University of Technology Dalian 116620 P. R. China

Molecular docking method plays an important role on the quest of potential drug candidates, which has been proven to be a valuable tool for virtual screening. Molecular docking is commonly referred to as a parameter optimization problem. During the last decade, some optimization algorithms have been introduced, such as Lamarckian genetic algorithm （LGA） and SODOCK embedded in the AutoDock program. On the basis of the latest docking software AutoDock4.2, we present a novel docking program ABCDock, which incorporates mutual artificial bee colony （MutualABC） into AutoDock. Computer simulation results demonstrate that ABCDock takes precedence over AutoDock and SODOCK, in terms of convergence performance, accuracy, and the lowest energy, especially for highly flexible ligands. It is noteworthy that ARCDock yields a higher success rate. Also, in comparison with the other state-of-the-art docking methods, namely GOLD, DOCK and FlexX, ABCDock provides the smallest RMSD in 27 of 37 cases.

关键词： Artificial Bee Colony AutoDock molecular docking

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The Research on Cascading Failure of Farey Network

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国际计算机前沿大会会议论文集 2017年第1期 99-103页

作者： xiujuan ma Fuxiang ma School of Computer Science Qinghai Normal UniversityXining 810008China

Cascading failure is an important part of the dynamics in complex *** this paper,we research the cascading failure of Farey network which is scale-free network with fractal properties by data *** to the analyses,we obtain an iterative expression of the failure nodes’number at the certain time step,anther iterative expression of the time which is needed for the network being global collapse,and the sequence of nodes failure in the Farey *** theoretical derivation,we get an approximate solutions of perturbation threshold R to make the network achieve the global *** the nodes number of the Farey network is lager,simulate results are closer to theoretical *** the simulation,we obtain the cascading failure process of the Farey network after suffering deliberate attack and random *** results show that,the failure nodes of Farey network increase gradually as R raises,until the network is global ***,Farey network shows stronger robustness for random *** environment.

关键词： Farey network Cascading failure Couple map lattices Perturbation threshold

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The Belt and Road Construction Creates Opprtunities for the Transformation of Shanxi manufacturing

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China's Foreign Trade 2020年第6期 36-39页

作者： Hu Wenxiu ma xiujuan Center for Belt and Road Initiative and Regional Development Taiyuan University of Technology College of marxism Taiyuan University of Technology

The Vision and Actions on Jointly Building the Silk Road Economic Belt and the 21st Century maritime Silk Road adopted in 2015 has become the general program behind China’s opening up and foreign economic cooperation... 详细信息

关键词： Road Transformation Create

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A note on noncommutative moment problems

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Science China mathematics 2005年第8期48卷 1144-1151页

作者： ma xiujuan School of Sciences, Hebei University of Technology, Tianjin 300130, China mathematics Institute, Academy of mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100080, China 1. School of Sciences Hebei University of Technology 300130 Tianjin China 2. mathematics Institute Academy of Mathematics and Systems Science Chinese Academy of Sciences 100080 Beijing China

Noncommutative moment problems for C*-algebras are studied. We generalize a result of Hadwin on tracial states to nontracial case. Our results are applied to obtain simple solutions to moment problems on the square and the circle as well as extend the positive unital functionals from a (discrete) complex group algebra to states on the group C*-algebra.

关键词： moment, free product, state, group C*-algebra.

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The Analysis of Phase Synchronisation in the Uniform Scale-Free Hypernetwork

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国际计算机前沿大会会议论文集 2023年第2期 344-363页

作者： xiujuan ma Juan Du Fuxiang ma Bin Zhou Wenqian Yu College of Computer Qinghai Normal UniversityXining 810016QinghaiChina The State Key Laboratory of Tibetan Intelligent Information Processing and Application Xining 810008QinghaiChina

many phenomena in realistic complex systems can be explained by the synchronisation behavior of complex systems,such as cricket chirping in *** synchronisation behavior occurring on a hypernetwork can be used to explain the swarming behavior occurring on a multivariate interacting system,such as the synchronised forwarding of group *** is a lack of results related to phase synchronization of hypernetwork in the existing studies on the synchronization behavior of *** address this problem,this paper investigates the node-based and hyperedge-based phase synchronisation of a scale-free hypernetwork using the Kuramoto model with the order parameter r as the synchronisation degree *** comparative analysis reveals that the phase synchronisation of the scale-free hypernetwork is related to the uniformity k of the hypernetwork but not to the number of nodes and hyperedges,and the phase synchronisation based on hyperedges is more likely to occur than that based on nodes as the coupling strength *** addition,the degree of phase syn-chronisation of scale-free hypernetworks is related to the number of new_nodes of newly added nodes when the hyperedge grows during the construction of the hypernetwork,which shows that the smaller the new_nodes is,the better the degree of synchronisation of the hypernetwork is.

关键词： k-uniform scale-free hypernetwork phase synchronisation

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Research on Multi-dimensional Teaching Evaluation of Teachers in Higher Colleges and Universities

Research on Multi-dimensional Teaching Evaluation of Teacher...

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第四届人文科学、管理和教育技术国际学术会议

作者： Shuwang Chang Yan Jing xiujuan ma School of Mechanical Electronic and Information EngineeringShandong University School of Information Science and Engineering Harbin Institute of Technology

Based on the four regressions and new 40 items of higher education proposed by the Ministry of Education in 2018,the teaching evaluation of teachers in higher colleges and universities is taken as the research object,the evaluation concept is updated,and a new type system of teaching evaluation is established with diversified evaluation subjects and multi-dimensional evaluation *** new system not only includes 6 evaluation subjects with different evaluation weight,but also includes 4 evaluation elements and 21 observation *** 6 evaluation subjects are teachers themselves,supervision team,peers,students,student information officers and third *** the 4 evaluation elements are abilities of basic teaching,informatization teaching,interaction between teachers and students and teaching ***,a correlation matrix between the evaluation subjects and the observation points is *** systematic and scientific evaluation system can improve the teaching ability of teachers in higher colleges and universities,and benefit their growth and development.

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Protective Effect of Buyang Huanwu Decoction on Cerebral Ischemia/Reperfusion Injury by Inhibiting Autophagy Based on AMPK/UIK1Signaling Pathway

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Journal of Integrative Medicine（双语） 2022年第2期11卷 9-28页

作者： Ruijuan Zhang Yanmeng Zhao xiujuan ma Jiabei Ye Yudong Shan Wentao Yu Xiaohong Zhou Weijuan Gao Hebei University of Chinese Medicine No.3Xingyuan RoadLuquan DistrictShijiazhuangHebei050200China

The aim of the paper is to explore whether AMPK/U1K1 signaling pathway is involved in regulating autophagy and alleviating cerebral ischemia/reperfusion(I/R)*** this basis,study the regulatory effect of Buyang Huanwu Decoction(BHD)on AMPK/U1K1 signaling pathway,aiming to clarify the molecular mechanism of BHD in alleviating cerebral I/R injury and the protective effect of BHD containing serum(BHDS)on OGD/R *** research group adopted the following methods:Neurons cultured for 7 days in vitro were randomly divided into normal control group,model group(OGD/R),AMPK activator(AICAR)group(3 mmol/L),Buyang Huanwu Decoction medicated serum(BHDS)group(3%),Buyang Huanwu Decoction medicated serum+AMPK activator(BHDS+AICAR)*** protein expressions of p-AMPK,AMPK,p-UlKl,U1K1,Beclin-1 and LC3B in neurons were detected by Western blot,the fluorescence intensity and apoptosis rate of neuron autophagosome CYTO-ID staining were detected by flow cytometry,the fluorescence intensity and morphological changes of neuron LC3B were detected by immunofluorescence double labeling method,the morphological changes of neurons were observed by inverted microscope,and the survival rate of neurons was detected by CCK-8 *** OGD/R model and the optimal concentration of *** neurons in the model group were subjected to hypoxia and glucose deprivation for 1 h,2 h,3 h,4 h and reoxygenation and glucose deprivation for 24 *** survival rate of neurons and the release rate of 1DH to determine whether the model was successfully *** the results show that BHDS group,the survival rate of OGD/R neurons was significantly increased,and the apoptosis rate was significantly *** them,3%BHDS intervention at the same time of hypoxia glucose deprivation for 3 h and reoxygenation glucose for 24 h was the best *** BHDS group,the levels of p-AMPK/AMPK,p-UlKl/UlKl,beclin-1,CYTO-ID and LC3B fluorescence intensity,and the transformation from LC3B-I to LC3B-I

关键词： BHDS Drug containing serum Traditional Chinese medicine Signal pathway Cell damage

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温度对改进型EGSB处理城镇污水的影响

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同济大学学报（自然科学版） 2009年第6期37卷 796-800页

作者：马利民唐燕萍马秀娟张亚雷同济大学污染控制与资源化国家重点实验室上海200092

利用配水使用改进型厌氧膨胀颗粒污泥床(EGSB)反应器研究了温度对处理城镇污水效果的影响.结果表明:改进型EGSB反应器在低温时(7~13℃)能正常启动,启动后反应器中pH值保持在6.2~7.6之间,略高于高温(大于25℃)阶段的6.0~7.4之间;在高温... 详细信息

利用配水使用改进型厌氧膨胀颗粒污泥床(EGSB)反应器研究了温度对处理城镇污水效果的影响.结果表明:改进型EGSB反应器在低温时(7~13℃)能正常启动,启动后反应器中pH值保持在6.2~7.6之间,略高于高温(大于25℃)阶段的6.0~7.4之间;在高温下反应器的启动比在低温时有更好的化学需氧量(COD)去除效果,启动时间也更短;低温启动后反应器出水的碱度为400 mg.L-1、挥发性脂肪酸(VFA)值为120 mg.L-1高温时出水的碱度为600mg.L-1、挥发性脂肪酸(VFA)值为180 mg.L-1.稳定运行阶段,随着温度的升高,改进型EGSB系统COD的去除率从逐步升高.低温时,COD的去除率均值为63.7%,高温时,COD的去除率均值为87.0%.温度和反应器内的氧化还原电位(ORP)呈明显负相关,反应器温度变化范围为7~29℃时,ORP变化范围为-410mV^-520mV.

关键词：温度城市污水改进型厌氧膨胀颗粒污泥床处理效果

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