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SFTA Based Saftey Analysis for Bridge Pattern

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SFTA Based Saftey Analysis for Bridge Pattern

The 8th International Conference on Reliability,Maintainability and Safety(ICRMS 2009)

作者： Guoqi Li department of system engineering of engineering Technology beihang university beijing100191.china Minyan Lu and Bin Liu department of system engineering of engineering technology beihang university beijing 100191 china

＜正＞To analysis the influence of application of design patterns to software safety,we carry out a case study on bridge pattern with SFTA（Software Fault Tree Analysis）.The result shows that the application of bridge pattern will make the safety reduce 50%,but the introduction of the pattern can decouple the software modules and redundancy design can be *** redundancy will improve software safety by 2 orden of *** conclusion is valuable for object-oriented design of safety-critical software and the method can also be used to analyze safety of other design patterns.

关键词： SFTA Design patterns Software safety

Effects of the CNTF-collagen gel-controlled delivery system on rat neural stem/progenitor cells behavior

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Science china(Life Sciences) 2010年第4期53卷 504-510页

作者： YANG ZhaoYang1, QIAO Hui2 & LI XiaoGuang1,3 1School of Biological Science and Medical engineering, beihang university, beijing 100191, china 2Public Heath School, Ningxia Medical university, Yinchuan 750004, china 3beijing Institute for Neuroscience, Capital Medical university, beijing 100069, china School of Biological Science and Medical engineering Beihang University Beijing China Public Heath School Ningxia Medical University Yinchuan China beijing Institute for Neuroscience Capital Medical University Beijing China

The injury of central nervous system (CNS) usually causes the cavity formation. Although transplantation of neural stem/precursor cells (NSPCs) into the lesioned area of CNS has been shown to be implicated in the functional restoration, the therapeutic result is limited by the poor survival of NSPCs as well as their insufficient proliferation and differentiation abilities. Type-1 collagen is considered as a candidate scaffold or drug delivery system to overcome the aforementioned obstacle. This study observed the effects of the CNTF (ciliary neurotrophic factor)-collagen gel-controlled delivery system and daily addition of soluble-form CNTF on the NSPC survival, migration, proliferation and differentiation. The results showed that, within 12 h of the initial co-culture, CNTF was released in a burst pattern, then the CNTF-collagen gel-controlled delivery system stably released CNTF for up to 12 d. The cell viability test, together with immunohistochemistry, RT-PCR and Western blotting, showed that the CNTF-collagen gel-controlled delivery system supported the NSPCs seeded on the surface of collagen gel survival and facilitated their migration and proliferation. The daily addition of soluble-form CNTF to the medium had similar effects to the CNTF-collagen gel-controlled delivery system, but large quantities of soluble-form CNTF were consumed during the entire process. Taken together, the CNTF-collagen gel-controlled delivery system not only provides a physical scaffold for the transplanted NSPCs to adhere and migrate, but also facilitates the NSPC survival, growth and proliferation, simultaneously reducing the consumption of the expensive growth factors. This system may be used to enhance the microenvironment in the lesioned area of CNS.

关键词： spinal cord neural stem/progenitor cells control release type-1 collagen CNTF

A Research about A MIMO system Identification Algorithm Based on ANN Using Slide Mode Variable Structure

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A Research about A MIMO System Identification Algorithm Base...

2011 Chinese Control and Decision Conference（CCDC）

作者： Yahui Wang1,Peixin Cheng 2 Zhifeng Xia3 1.department of Automation engineering,beijing university of Civil & Architecture engineering,beijing 100044,china2.china Architecture Design&Research Group,beijing 100044,china3.beijing Forestry university,beijing 100083,china

Applying sliding mode variable structure control to train neural networks is proposed in this paper,which can not only increases learning rate but also improves the stability of ***,this method helps to promote the generalization capacity of *** order to improve the generalization ability,two sliding mode objective functions are designed based on previous researches for a new neural-network learning *** analysis shows that the proposed algorithm increases the generalization ability and robustness of neural-network,meanwhile,enhances the identification accuracy.

关键词： MIMO system Identification Sliding Mode Variable Structure Neural-Network Generalization Ability

A Quasi-Sliding Mode Variable Structure Control Algorithm for Discrete-Time and Time-Delay systems

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A Quasi-Sliding Mode Variable Structure Control Algorithm fo...

2011 Chinese Control and Decision Conference（CCDC）

作者： Yahui Wang1,Zhifeng Xia 2,Zhijian Jiang1,Geng Xie 3 1.department of Automation engineering,beijing university of Civil & Architecture engineering,beijing 100044,china2.beijing Forestry university,beijing 100083,china3.The Architectural Design & Research Institute,Tsinghua university,beijing 100084,china

Quasi-sliding mode variable structure control strategy takes its own advantages in solving discrete-time and time-delay systems’ *** paper proposed a kind of quasi-sliding mode control algorithm based on the Smith *** simulation results showed:the proposed control method greatly compensates time-delay and the control strategy could be simply and easily *** the premise of ensuring the stability of the second order closed-loop system,this algorithm helped systems gain good robustness against parameter perturbation and external disturbance.

关键词： Discrete-time Time-delay system Quasi-sliding Mode Variable Structure Control Smith Predictor

Anticorrosive and antibacterial smart integrated strategy for biomedical magnesium

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Journal of Magnesium and Alloys 2023年第8期11卷 2789-2800页

作者： JianLiang Zhao HanRui Cui ZeYu Gao YanZe Bi zhenzhen Dong Yan Li CaiQi Wang School of ChemicalScience University of Chinese Academy of SciencesBeijing100049China School of Materials Science and engineering Beihang UniversityBeijing 100083China beijing Advanced Innovation Centre for Biomedical engineering Beihang UniversityBeijing 100191China

Biomedical magnesium is an ideal material for hard tissue repair and ***,its rapid degradation and infection after implantation significantly hindersclinical *** overcome these two critical drawbacks,we describe an integrated strategybased on the changes in pH and Mg^(2+)triggered by *** system can simultaneously offer anticorrosion and antibacterial ***,nanoengineered peptide-grafted hyperbranched polymers(NPGHPs)with excellent antibacterial activity were introduced to sodium alginate(SA)to construct a sensitive NPGHPs/SA *** swelling degree,responsiveness,and antibacterial activity were then investigated,indicating that the system can perform dual stimulation of pH and Mg^(2+)with controllable antimicrobial ***,an intelligent platform was constructed by coating hydrogels on magnesium with polydopamine as the transition *** alkaline environment generated by the corrosion of magnesium reduces the swelling degree of the coatingso that the liquid is unfavorable for contacting the substrate,thus exhibiting superior corrosion *** testing shows that the material can effectively fight against bacteria,while hemolytic and cytotoxicity testing suggest that it is highly ***,this work realizes the smart integration of anticorrosion and antibacterial properties of biomedical magnesium,thereby providing broader prospects for the use of magnesium.

关键词： Biomedical magnesium Anticorrosion Antibacterial Intelligent Nanoengineered peptide-grafted hyperbranched polymers

Electrospinning of a sandwich-structured membrane with sustained release capability and long-term anti-inflammatory effects for dental pulp regeneration

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Bio-Design and Manufacturing 2022年第2期5卷 305-317页

作者： Fenghe Yang Jiangxue Wang Xiaoyu Li zhenzhen Jia Qiang Wang Dazhi Yu Jinyu Li Xufeng Niu Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education Beijing Advanced Innovation Center for Biomedical EngineeringSchool of Biological Science and Medical EngineeringBeihang UniversityBeijing 100083China department of Burn Plastic Surgery 80th Army Hospital of PLAWeifang 261021China department of Hand Surgery 971st Army Hospital of PLAQingdao 266000China department of Orthopaedics Dongzhimen HospitalBeijing University of Chinese MedicineBeijing 100700China

Current electro spun membranes used for pulp capping still lack the sustained-release capability and long-term anti-inflammatory effects that are favorable for dental pulp *** this work,a single-layered poly(lac tic acid)(PLA)electro spun membrane loaded with amorphous calcium phosphate(ACP)and aspirin(PLA/ACP/Aspirin membrane,i.e.,PA A membrane)is sandwiched between two poly(lactic-co-glycolic acid)(PLGA)electro spun membranes as a novel sandwich-structured PLGA and PA A composite electro spun membrane(PLGA-PAA membrane)to resolve the need for sustained-release design and anti-inflammatory *** angle measurements indicate that the PLGA-PAA membrane is more hydrophilic than the PAA *** in vitro release study reveals that PLGA membranes coated on PAA membrane could slightly slow down ion release,while signiificantly prolonging aspirin *** also co-cultured membranes with dental pulp stem cells(DPSCs)and human monocytic THP-1 cells to evaluate their osteogenic ability and anti-inflammatory effects,*** with the PAA membrane,the PLGA-PAA membrane promotes cell adhesion,proliferation,and osteogenic differentiation.A prolonged anti-inflammatory effect of up to 18 days is also observed in the PLGA-PAA *** results suggest a promising strategy for fabricating an electro spun membrane system with controlled release capabilities and long-term anti-inflammatory effects for use as pulp-capping material for regeneration of the dentin-pulp complex.

关键词： Electrospinning Sandwich-structured Pulp capping Controlled release Anti-inflammatory effects

Gradient defects mediate negative thermal quenching in phosphors

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Advanced Photonics 2023年第2期5卷 34-45页

作者： Mingxue Deng Xingzhong Cao Yangmin Tang zhenzhen zhou Lijia Liu Xiaofeng Liu Peng Zhang Lo-Yueh Chang Hao Ruan Xinjun Guo Jiacheng Wang Qian Liu Chinese Academy of Sciences Shanghai Institute of CeramicsState Key Laboratory of High Performance Ceramics and Superfine MicrostructureShanghaiChina university of Chinese Academy of Sciences Center of Materials Science and Optoelectronics EngineeringBeijingChina Chinese Academy of Sciences Institute of High Energy PhysicsBeijingChina Western university Department of ChemistryLondonOntarioCanada Zhejiang university School of Materials Science and EngineeringHangzhouChina Taiwan Synchrotron Radiation Centre HsinchuChina Chinese Academy of Sciences Shanghai Institute of Optics and Fine MechanicsLaboratory of Micro-Nano Optoelectronic Materials and DevicesShanghaiChina North china university of Science and Technology College of Materials Science and EngineeringHebei Provincial Key Laboratory of Inorganic Nonmetallic MaterialsTangshanChina Taizhou university School of Materials Science and EngineeringTaizhouChina

Luminescent materials often suffer from thermal quenching(TQ),limiting the continuation of their applications under high temperatures up to 473 *** formation of defect levels could suppress TQ,but rational synthesis and deep understanding of multiple defects-regulated luminescent materials working in such a wide temperature range still remain ***,we prepare a negative thermal quenching(NTQ)phosphor LiTaO_(3)∶Tb^(3+)by introducing gradient defects V_(Ta)^(5−),Tb_(Li)^(2+),and(V_(Ta)Tb_(Li))^(3−)as identified by advanced experimental and theoretical *** photoluminescence significantly becomes intense with rising temperatures and then slowly increases at 373 to 473 *** mechanism studies reveal that gradient defects with varied trapping depths could act as energy buffer layers to effectively capture the *** thermal disturbance,the stored carriers could successively migrate to the activators in consecutive and wide temperature zones,compensating for TQ to enhance luminescence *** study initiates the synthesis of multi-defect NTQ phosphors for temperature-dependent applications.

关键词： gradient defects negative thermal quenching energy buffer layers temperature-dependent information encryption

A Review of Gallium Nitride Power Device and Its Applications in Motor Drive

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CES Transactions on Electrical Machines and systems 2019年第1期3卷 54-64页

作者： Xiaofeng Ding Yang zhou Jiawei Cheng the Electrical engineering department Beihang UniversityBeijingChina

Wide band-gap gallium nitride(GaN)device has the advantages of large band-gap,high electron mobility and low dielectric *** with traditional Si devices,these advantages make it suitable for fast-switching and high-power-density power electronics converters,thus reducing the overall weight,volume and power consumption of power electronic *** a review paper,this paper summarizes the characteristics and development of the state-of-art GaN power devices with different structures,analyzes the research status,and forecasts the application prospect of GaN *** addition,the problems and challenges of GaN devices were *** thanks to the advantages of GaN devices,both the power density and efficiency of motor drive system are improved,which also have been presented in this paper.

关键词： GaN motor drive power device

The 2022 report of synergetic roadmap on carbon neutrality and clean air for china:Accelerating transition in key sectors

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Environmental Science and Ecotechnology 2024年第3期19卷 4-18页

作者： Yu Lei Zhicong Yin Xi Lu Qiang Zhang Jicheng Gong Bofeng Cai Cilan Cai Qimin Chai Huopo Chen Renjie Chen Shi Chen Wenhui Chen Jing Cheng Xiyuan Chi Hancheng Dai Xiangzhao Feng Guannan Geng Jianlin Hu Shan Hu Cunrui Huang Tiantian Li Wei Li Xiaomei Li Jun Liu Xin Liu Zhu Liu Jinghui Ma Yue Qin Dan Tong Xuhui Wang Xuying Wang Rui Wu Qingyang Xiao Yang Xie Xiaolong Xu Tao Xue Haipeng Yu Da Zhang Ning Zhang Shaohui Zhang Shaojun Zhang Xian Zhang Xin Zhang Zengkai Zhang Bo Zheng Yixuan Zheng Jian zhou Tong Zhu Jinnan Wang Kebin He Center of Air Quality Simulation and system Analysis Chinese Academy of Environmental PlanningBeijing100041China Center for Carbon Neutrality Chinese Academy of Environmental PlanningBeijing100041China Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environment Change(ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)Nanjing University of Information Science&TechnologyNanjing210044China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing100084China Institute for Carbon Neutrality Tsinghua UniversityBeijing100084China Ministry of Education Key Laboratory for Earth system Modelling Department of Earth System ScienceTsinghua UniversityBeijing100084China State Key Joint Laboratory for Environment Simulation and Pollution Control College of Environmental Sciences and Engineering and Center for Environment and HealthPeking UniversityBeijing100871China National Center for Climate Change Strategy and International CooperationBeijing100035China Nansen-Zhu International Research Centre Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing100029China School of Public Health Key Lab of Public Health Safety of the Ministry of Education and Key Lab of Health Technology Assessment of the Ministry of HealthFudan UniversityShanghai200032China School of Economics and Management Beijing University of Chemical TechnologyBeijing100029China department of Earth system Science University of CaliforniaIrvineCA92697USA National Meteorological Center China Meteorological AdministrationBeijing100081China College of Environmental Sciences and engineering Peking UniversityBeijing100871China Policy Research Center for Environment and Economy Ministry of Ecology and Environment of the People's Republic of ChinaBeijing100029China Jiangsu Key Laboratory of Atmospheric Environment Monitoring

china is now confronting the intertwined challenges of air pollution and climate *** the high synergies between air pollution abatement and climate change mitigation,the Chinese government is actively promoting synergetic control of these two *** Synergetic Roadmap project was launched in 2021 to track and analyze the progress of synergetic control in china by developing and monitoring key *** Synergetic Roadmap 2022 report is the first annual update,featuring 20 indicators across five aspects:synergetic governance system and practices,progress in structural transition,air pollution and associated weather-climate interactions,sources,sinks,and mitigation pathway of atmospheric composition,and health impacts and benefits of coordinated *** to the comprehensive review presented in the 2021 report,the Synergetic Roadmap 2022 report places particular emphasis on progress in 2021 with highlights on actions in key sectors and the relevant *** milestones include the proportion of non-fossil power generation capacity surpassing coal-fired capacity for the first time,a decline in the production of crude steel and cement after years of growth,and the surging penetration of electric ***,in 2022,china issued the first national policy that synergizes abatements of pollution and carbon emissions,marking a new era for china's pollution-carbon *** changes highlight china's efforts to reshape its energy,economic,and transportation structures to meet the demand for synergetic control and sustainable ***,the country has witnessed a slowdown in carbon emission growth,improved air quality,and increased health benefits in recent years.

关键词： Synergetic roadmap Carbon neutrality Clean air