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Modeling and Analysis of Scheduling for Distributed Real-time Embedded Systems

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International Journal of Automation and computing 2010年第4期7卷 525-530页

作者： Hai-Tao Zhang gui-fang Wu Electronic and Information Engineering College Henan University of Science and Technology Luoyang 471003 PRC

Aimed at the deficiencies of resources based time Petri nets （RBTPN） in doing scheduling analysis for distributed real-time embedded systems, the assemblage condition of complex scheduling sequences is presented to easily compute scheduling length and simplify scheduling analysis. Based on this, a new hierarchical RBTPN model is proposed. The model introduces the definition of transition border set, and represents it as an abstract transition. The abstract transition possesses all resources of the set, and has the highest priority of each resource; the cxecution time of abstract transition is the longest time of all possible scheduling sequences. According to the characteristics and assemblage condition of RBTPN, the refinement conditions of transition border set are given, and the conditions ensure the correction of scheduling analysis. As a result, it is easy for us to understand the scheduling model and perform scheduling analysis.

关键词： Embedded systems modeling time Petri nets scheduling analysis

Investigation and Verification of the Aerodynamic Performance of a Fan/Booster with Through-flow Method

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Journal of Thermal Science 2018年第2期27卷 103-110页

作者： liu Xiaoheng JIN Donghai gui Xingmin School of Energy and Power Engineering Beihang University Collaborative Innovation Center of Advanced Aero-Engine Beihang University

Through-flow method is still widely applied in the revolution of the design of a turbomachinery, which can provide not merely the performance characteristic but also the flow field. In this study,a program based on the through-flow method was proposed, which had been verified by many other numerical examples. So as to improve the accuracy of the calculation, abundant loss and deviation models dependent on the real geometry of engine were put into use,such as: viscous losses,overflow in gaps, leakage from a flow path through seals. By means of this program, the aerodynamic performance of a certain high through-flow commercial fan/booster was investigated. On account of the radial distributions of the relevant parameters, flow deterioration in this machine was speculated. To confirm this surmise, 3-D numerical simulation was carried out with the help of the NUMECA software. Through detailed analysis, the speculation above was demonstrated, which provide sufficient evidence for the conclusion that the through-flow method is an essential and effective method for the performance prediction of the fan/booster.

关键词： fan/booster through-flow method axisymmetric flow NUMECA simulation

A novel male-specific SET domain-containing gene setdm identified from extra microchromosomes of gibel carp males

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Science Bulletin 2017年第8期62卷 528-536页

作者： Xi-Yin Li Xiao-Li liu Miao Ding Zhi Li Li Zhou Xiao-Juan Zhang Jian-fang gui Stare Key Laboratory of Freshwater Ecology and Biotechnology Institute of Hydrobiology Chinese Academy of Sciences University of Chinese Academy of Sciences Wuhan 4.30072 China

Various genes have been screened on extra chromosomes, but their molecular characterization, expression pattern and biological function are still unclear. Here, we utilized a male-specific sequence of polyploid gibel carp （Carassius gibelio） to identify a novel male-specific SET （Su（var）3-9, Enhancer- of-zeste, Trithorax） domain-containing gene setdm on extra microchromosomes of gibel carp males. And setdm was characterized in molecule and expression aspects, in which its expression was specific to testis, and had relative high transcription during middle/late stages of testis development. Moreover, prominent expression of Setdm in spermatogenic cells was observed in testis through immunofluorescence co-localization analysis. These results suggest that biological function of setdrn might be related to testis development and spermatogenesis of gibel carp. Additionally, the homeologous gene setdmf of setdm, was also characterized, and its expression was gonad-specific, in which its expressed product was detected to mainly distribute in gametogenic cells of testis and ovary, and to have dynamic expression pattern similar to that of setdm. Based on the current results, we propose that the novel male-specific setdm on extra microchromosomes might be functional divergence gene of the gonad-specific setdmf. Therefore, these findings will help us to further understand evolutionary fate and functional role of genes on extra microchromosomes.

关键词： Microchromosomes Snpernumerary chromosomes Sex determination Spermatogenesis Polyploid

Antimicrobial Properties and Application of Polysaccharides and Their Derivatives

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Chinese Journal of Polymer Science 2021年第2期39卷 133-146,I0004页

作者： gui-Xue Xia Yue-Ming Wu Yu-fang Bi Kang Chen Wei-Wei Zhang Shi-Qi liu Wen-Jing Zhang Run-Hui liu State Key Laboratory of Bioreactor Engineering East China University of Science and TechnologyShanghai 200237China Frontiers Science Center for Materiobiology and Dynamic Chemistry Key Laboratory of Specially Functional Polymeric Materials and Related Technology(ECUST)Ministry of EducationSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China

With the quick emergence of antibiotic resistance and multi-drug resistant microbes,more and more attention has been paid to the development of new antimicrobial agents that have potential to take the ***,as one of the major classes of biopolymers,were explored for their antimicrobial properties and applications,owing to their easy accessibility,biocompatibility and easy *** and their derivatives have variable demonstrations and applications as antimicrobial agents and antimicrobial biomaterials.A variety of polysaccharides,such as chitosan,dextran,hyaluronic acid,cellulose,other plant/animal-derived polysaccharides and their derivatives have been explored for antimicrobial *** expect that this review can summarize the important progress of this field and inspire new concepts,which will contribute to the development of novel antimicrobial agents in combating antibiotic resistance and drug-resistant antimicrobial infections.

关键词： Antimicrobial Drug resistance Polysaccharides Polysaccharide derivatives Chitosan

Estimation of the potential geographical distribution of a new potato pest(Schrankia costaestrigalis) in China under climate change

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Journal of Integrative Agriculture 2023年第8期22卷 2441-2455页

作者： XIAN Xiao-qing ZHAO Hao-xiang GUO Jian-yang ZHANG gui-fen liu Hui liu Wan-xue WAN fang-hao State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing100193P.R.China The National Agro-Tech Extension and Service Center Beijing 100193P.R.China

Global food security is threatened by the impacts of the spread of crop pests and changes in the complex interactions between crops and pests under climate *** costaestrigalis is a newly-reported potato pest in southern ***-warning monitoring of this insect pest could protect domestic agriculture as it has already caused regional yield reduction and/or quality decline in potato *** research aimed to confirm the potential geographical distributions(PGDs)of *** in China under different climate scenarios using an optimal MaxEnt model,and to provide baseline data for preventing agricultural damage by *** findings indicated that the accuracy of the optimal MaxEnt model was better than the default-setting model,and the minimum temperature of the coldest month,precipitation of the driest month,precipitation of the coldest quarter,and the human influence index were the variables significantly affecting the PGDs of *** highly-and moderately-suitable habitats of *** were mainly located in eastern and southern *** PGDs of *** in China will decrease under climate *** conversion of the highly-to moderately-suitable habitat will also be significant under climate *** centroid of the suitable habitat area of *** under the current climate showed a general tendency to move northeast and to the middle-high latitudes in the *** agricultural practice of plastic film mulching in potato fields will provide a favorable microclimate for *** in the suitable *** attention should be paid to the early warning and monitoring of *** in order to prevent its further spread in the main areas in China’s winter potato planting regions.

关键词： climate change potential geographical distribution crop insect pests Schrankia costaestrigalis MaxEnt model

Chinese wisdom and modern innovation of aquaculture

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Water Biology and Security 2024年第3期3卷 1-8页

作者： Jian-fang gui State Key Laboratory of Freshwater Ecology and Biotechnology Hubei Hongshan LaboratoryThe Innovation Academy of Seed DesignInstitute of HydrobiologyChinese Academy of SciencesWuhanChina University of Chinese Academy of Sciences BeijingChina

Aquaculture originates from ancient Chinese wisdom,and is considered the most efficient food-producing *** 70 years ago,New China proposed an industrial approach to fish production and made a policy decision to begin modern aquaculture *** one of lucky persons since the early 1980s,I have committed my scholarly career to the studies on genetics and breeding biotechnology of polyploid gibel carp(Carassius gibelio).Here,several significant recent innovations,such as the proposition of the amphitriploid concept,the association of ploidy changes with reproduction transition,the finding of a unique ameiofusiongenesis mode,the establishment of a controllable fertility approach,the creation of intermuscular bonefree mutants,as well as the recreation of desirable goldfish,are introduced and emphasized from an active participant of these ***,some modern innovations and contributions are also highlighted in other aspects of aquaculture including feed development,disease control,facilities and equipment upgrading,as well as paradigm and mode *** comprehensive synthesis of ancient Chinese wisdom and modern innovations seeks to provide valuable insights into the field from a historical basis.

关键词： Aquaculture Genetic breeding Seed industry Biotechnology Gibel carp Goldfish

Application of artificial synapse based on all-inorganic perovskite memristor in neuromorphic computing

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Nano Materials Science 2024年第1期6卷 68-76页

作者： fang Luo Wen-Min Zhong Xin-gui Tang Jia-Ying Chen Yan-Ping Jiang Qiu-Xiang liu School of Physics&Optoelectric Engineering Guangdong University of TechnologyGuangzhou Higher Education Mega CenterGuangzhou510006China

Artificial synapse inspired by the biological brain has great potential in the field of neuromorphic computing and artificial *** memristor is an ideal artificial synaptic device with fast operation and good ***,we have prepared a memristor device with Au/CsPbBr_(3)/ITO *** memristor device exhibits resistance switching behavior,the high and low resistance states no obvious decline after 400 switching *** memristor device is stimulated by voltage pulses to simulate biological synaptic plasticity,such as long-term potentiation,long-term depression,pair-pulse facilitation,short-term depression,and short-term *** transformation from short-term memory to long-term memory is achieved by changing the stimulation *** addition,a convolutional neural network was constructed to train/recognize MNIST handwritten data sets;a distinguished recognition accuracy of~96.7%on the digital image was obtained in 100 epochs,which is more accurate than other memristor-based neural *** results show that the memristor device based on CsPbBr3 has immense potential in the neuromorphic computing system.

关键词： Memristor CsPbBr_(3) Resistive switching Artificial synapse Neuromorphic computing

Reactor protection system testing for the solid fuel thorium molten salt reactor

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Nuclear Science and Techniques 2016年第5期27卷 238-246页

作者： Zhen-Bao liu Ye liu gui-Min liu Jie Hou Shanghai Institute of Applied Physics Chinese Academy of Sciences Jiading campus Shanghai 201800 China University of Chinese Academy of Sciences Beijing 100049China

Safety system testing is one of the most rigorous and time-consuming requirements in the verification and validation process for reactor protection systems(RPSs).This paper presents the development of a test system for the fully digital and field-programmable gate array-based RPS of the solid fuel(SF) thorium-breeding molten salt pebble bed fluoride salt-cooled reactor(TMSR),denoted as the TMSR-SF1 project,developed by the Chinese Academy of *** test system is applied to the RPS to ensure that it fully meets its designed functions and system *** first introduce the testing principles and ***,the hardware component designs and the software program development of the test system are ***,the test process and test results are discussed and summarized.

关键词：反应堆保护系统试验过程固体燃料熔盐现场可编程门阵列测试系统钍设计功能

Spatial dependence of high energy electrons and their radiations in pulsar wind nebulae

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Research in Astronomy and Astrophysics 2016年第6期16卷 47-58页

作者： fang-Wu Lu Quan-gui Gao Li Zhang Department of Astronomy Key Laboratory of Astroparticle Physics of Yunnan ProvinceYunnan University Department of Physics Yuxi Normal University

We investigate the spatial dependence of high energy electrons and their radiations in pulsar wind nebulae （PWNe）. By assuming a time-dependent broken power-law injection and spatial dependence of convection velocity, magnetic field strength and diffusion coefficient on the radial distance of an expand- ing system, we numerically solve the Fokker-Planck transport equation including convection, diffusion, adiabatic loss and radiative loss in spherical coordinates, and investigate the effects of magnetic field, PWN age, maximum energy of electrons, and diffusion coefficient on electron spectra and non-thermal photon emissions. Our results indicate that （1） electron spectra and the corresponding photon spectra are a function of radial distance r of the expanding system; （2） for a given expansion velocity, the increase of the PWN age causes a slower decrease of the convection velocity （V ∝ r-β） and a more rapid decrease of the magnetic field strength （B ∝ r-1＋β）, but a more rapid increase of the diffusion coefficient （k∝ r1-β） because the index β decreases with the PWN age; and （3） the lower energy part of the electron spectra is dominated by convection and adiabatic loss, but the higher energy part is dominated by the competition between syn- chrotron loss and diffusion, and such a competition is a function of radial distance. Therefore the diffusion effect has an important role in the evolution of electron spectra as well as non-thermal photon spectra in a PWN.

关键词： diffusion -- ISM: supernova remnants -- pulsars: general -- radiation mechanisms: non-thermal