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Hypoxia and Escherichia coli LPS-induced periodontal resident cells PAMP expressions

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Hypoxia and Escherichia coli LPS-induced periodontal residen...

Truth-value transmittal fuzzy reasoning inter-polator

第九届全国免疫学学术大会

作者： Chen Yu Sai wa. Tsao W.keung leung Faculty of Dentistry LKS Faculty of MedicineThe University of Hong Kong Department of Anatomy LKS Faculty of MedicineThe University of Hong Kong

Background:The recognition of anaerobic periodontopathogens related molecular patterns(PAMP)by Toll-like(TL)and/or NOD-like receptors(NLRs)of human gum lining cells could lead to local chronic inflammation and eventua...

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来源： cnki会议评论

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Science in China(Series F) 2005年第6期48卷 737-746页

作者： YAN Jianping leung Yee Department of Computer Science and Technology Beijing Normal University Beijing 100875 China Department of Geography Hong Kong Chinese University Hong Kong

In this paper, we firstly associate fuzzy reasoning algorithm with the interpolation algorithm and discuss the limitation of defuzzification methods used commonly in the fuzzy reasoning algorithm. Secondly, we give a new fuzzy reasoning algorithm in case of single input, called the truth-value transmittal method, and discuss its properties. Finally, we analyze the rationality to adopy the truth-value transmittal method as the defuzzification method of full implication triple I method, and show that although CRI and triple I fuzzy reasoning method are different from fuzzy output set, they are uniform finally under the truth-value transmittal defuzzification method.

关键词： fuzzy reasoning interpolation triple I method truth-value transmittal method.

Implementing Tai Ji Quan:Moving for Better Balance in real-world settings:Success and challenges

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Journal of Sport and Health Science 2014年第1期3卷 34-35,65页

作者： Jade leung Division of Injury Prevention Center for Injury & Sexual Assault Prevention/EHB/PHPAMaryland Department of Health and Mental Hygiene

***The article by Fink and Houston1 in this special issue of Journal of Sport and Health Science provides an excellent example of implementing an evidence-based fall prevention program in real communities with diverse cultures of elderly *** preliminary,the project revealed a number of interconnected barriers and facilitators that shed light on practical implications ("lessons learned") for policymakers and program providers regarding implementation of any evidence-based *** applauding Fink and Houston's effort,in this commentary we share our experiences with Tai Ji Quan:Moving for Better Balance (TJQMBB)2 in the state of Maryland,with a discussion of our own set of lessons learned in terms of successes and challenges.

关键词： VIPP Implementing Tai Ji Quan real

Methods of Modifying the Brittle Behavior of Cementitious Composites

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Journal of Wuhan University of Technology(Materials Science) 2010年第1期25卷 156-161页

作者：庞超明 leung Christopher KY College of Materials Science and Engineering Southeast UniversityJiangsu Key laboratory of Construction Materials Department of Civil and Environmental Engineering Hong Kong University of Science and Technology

We put forwa.d effective methods of increasing the tensile strain of cementitious composites with 2% PVA fiber and high fly ash content. The test results show that curing condition has a significantly effect on the tensile performance. It is approved that the specimens incorporated appropriate volume fraction rubber powder and lightweight aggregate greatly increase the tensile strain of composites at medium-term age, but indefinitely at long-term age. To a certain extent, EVA can limitedly enhance the tensile performance of comentitious composites owing to the formation of polymer membrane and the hindered hydration of cement.

关键词： high-ductility cementitious composites (HDCC) tensile properties high content of fly ash rubber powder light aggregate ethylene vinyl alcohol latex powder

Dynamic stiffness for thin-wa.led structures by power series

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第8期7卷 1351-1357页

作者： ZHU Bin leung A.Y.T. Department of Civil Engineering Zhejiang University Hangzhou 310027 China Department of Building and Construction City University of Hong Kong Hong Kong China

The dynamic stiffness method is introduced to analyze thin-wa.led structures including thin-wa.led straight beams and spatial twisted helix beam. A dynamic stiffness matrix is formed by using frequency dependent shape functions which are exact solutions of the governing differential equations. With the obtained thin-wa.led beam dynamic stiffness matrices, the thin-wa.led frame dynamic stiffness matrix can also be formulated by satisfying the required displacements compatibility and forces equilib-rium, a method which is similar to the finite element method (FEM). Then the thin-wa.led structure natural frequencies can be found by equating the determinant of the system dynamic stiffness matrix to zero. By this wa., just one element and several elements can exactly predict many modes of a thin-wa.led beam and a spatial thin-wa.led frame, respectively. Several cases are studied and the results are compared with the existing solutions of other methods. The natural frequencies and buckling loads of these thin-wa.led structures are computed.

关键词： Dynamic stiffness method Thin-wa.l structures Power series Buckling

Profiling selected paths with loops

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Science China(Information Sciences) 2014年第7期57卷 74-88页

作者： LI BiXin wa.G LuLu leung Hareton School of Computer Science and Engineering Southeast University Department of Computing Hong Kong Polytechnic University

Path profiling records the frequency of each path in an executed *** accomplish profiling,probes are instrumented in the program and executed as the program ***,the number of probes has a significant impact on the efficiency of a profiling *** profiling only the interesting paths,existing techniques try to improve the profiling efficiency by reducing the number of probes and optimize path encodings for efficient ***,they lack accuracy,wa.te time on running uninteresting paths,and can mainly deal with acyclic *** this article,a novel technique called Profiling Selected Paths(PSP)is introduced to profile selected paths,which enables custom selection for both acyclic and cyclic paths and increases the execution efficiency by early termination on uninteresting *** analysis and experimental evaluation indicate that PSP performs better than existing techniques.

关键词： path profiling interesting paths dynamic analysis

Failure strength and fracture characteristics of rock with discontinuity under indirect tension

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Journal of Rock Mechanics and Geotechnical Engineering 2022年第6期14卷 1810-1822页

作者： Dongya Han Jianbo Zhu Yat-Fai leung School of Resources and Safety Engineering Central South UniversityChangshaChina Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityHong KongChina Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization Institute of Deep Earth Sciences and Green EnergyCollege of Civil and Transportation EngineeringShenzhen UniversityShenzhenChina

Large-scale discontinuities can significantly affect the mechanical properties of rock ***,the tensile behavior of rock discontinuities is often less *** study the statistical characteristics of failure strength and fracture characteristics of rock discontinuities,Brazilian disc tests were conducted on limestone specimens with a single natural discontinuity at different load-discontinuity angles(β).In this study,β=0°andβ=90°correspond to the discontinuity parallel and perpendicular to loading direction,*** results show that Brazilian failure strength(BFS)can reasonably represent the tensile strength of rock with discontinuities,by comparing the BFS and tensile stress in the disc center at peak *** two-parameter Weibull distribution can capture the statistical BFS characteristics of rock discontinuities parallel to loading direction(β=0°)and at different loaddiscontinuity angles(β≠0°).All specimens with discontinuity at different load-discontinuity angles show more plastic deformational behaviour than intact rock *** increasingβ,the mean BFS of limestone with discontinuity increases before reaching a plateau atβ=45°.The single plane of weakness theory best explains the BFS of fractured limestone withβ.Only a specific segment of preexisting rock discontinuity could affect the fracture ***β=0°,interfacial cracks and alternative cracks ***β≠0°,mixed failure mode with shear and tensile failure occurred,particularly whenβ=30°andβ=60°.The findings can contribute to better understanding the failure and fracture characteristics of rock with discontinuities,particularly the interaction of pre-existing discontinuities with stress-induced fracturing.

关键词： Brazilian failure strength(BFS) Weibull distribution Rock discontinuity Anisotropy

基于深度强化学习的空天地一体化网络信息物理系统垂直切换策略

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通信学报 2024年第8期45卷 180-191页

作者：武艳潘广川姚明旿杨清海梁中明西安电子科技大学空天地一体化综合业务网全国重点实验室陕西西安710071 深圳大学计算机与软件学院物联网研究中心广东深圳518060

针对空天地一体化网络信息物理系统模型复杂、很难获得网络拓扑先验知识和模型化假设的特点,研究其基于深度强化学习的垂直切换策略。首先,综合考虑系统稳定性、切换开销和网络使用成本约束,将垂直切换策略问题建模为约束马尔可夫决策过... 详细信息

针对空天地一体化网络信息物理系统模型复杂、很难获得网络拓扑先验知识和模型化假设的特点,研究其基于深度强化学习的垂直切换策略。首先,综合考虑系统稳定性、切换开销和网络使用成本约束,将垂直切换策略问题建模为约束马尔可夫决策过程(CMDP),并给出保证可行解存在的充分条件;其次,提出约束-近端策略优化(CPPO)算法解决该问题,并在基站侧引入分布式强化学习机制加速训练收敛。相较于基准策略,仿真验证了所提垂直切换策略的优越性和有效性。

关键词：空天地一体化网络信息物理系统深度强化学习垂直切换

Follow up of serial urea breath test results in patients after consumption of antibiotics for non-gastric infections

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World Journal of Gastroenterology 2002年第4期8卷 703-706页

作者： wa.-keung leung Lawrence Cheung-Tsui Hung Carrie Ka-Li Kwok Rupert Wing-Loong Leong Daniel Kwok-keung Ng Joseph Jao-Yiu Sung Department of Medicine & Therapeutics Prince of Wales Hospitalthe Chinese University of Hong KongShatinHong KongChina Department of Paediatrics Kwong Wah HospitalKowloonHong KongChina

AIM: The widespread use of antibacterial therapy hasbeen suggested to be the cause for the decline in theprevalence of Helicobacter pyloriinfection. This studyexamine the serial changes of urea breath test resultsin a group of hospitalized patients who were givenantibacterial therapy for non-gastric ***: Thirty-five hospitalized patients who weregiven antibacterial therapy for clinical infections,predominantly chest and urinary infections, werestudied. Most (91%) patients were given singleantibiotic of either a penicillin or cephalosporin *** 13C-urea breath tests were performed within 24hours of initiation of antibiotics, at one-week and atsix-week post-therapy. H. pylori infection wa.diagnosed when one or more urea breath tests ***: All 35 patients completed three serial ureabreath tests and 26 (74 %) were H. pylori-positive. Ten(38 %) H. pylori-infected patients had at least onenegative breath test results during the study *** medium delta 13C values were significantly lowerat baseline (8.8) than at one-week (20.3) and six-week(24.5) post-treatment in H. pylori-positive individuals(P=0.022). Clearance of H. pyloriat six-week wa. onlyseen in one patient who had received anti-helicobactertherapy from another ***: Our results suggested that one-third ofH. pylori-infected individuals had transient false-negative urea breath test results during treatment withantibacterial agent. However, clearance of H. pyloriinfection by regular antibiotic consumption is rare.

关键词：抗生素 HP感染连续尿素呼吸试验耐药