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Wireless Sensor Network 2011年第11期3卷 357-361页

作者： Su man Nam chung Il Sun Tae Ho Cho 不详

Sensor nodes are easily compromised to malicious attackers due to an open environment. A false injected attack which takes place on application layer is elected by the compromised node. If the false report arrives in a base station, a false alarm is occurred, and the energy of the nodes is consumed. To detect the false report, statistical en-route filtering method is proposed. In this paper, we proposed the secure path cycle selection method using fuzzy rule-based system to consume effective energy. The method makes balanced energy consumption of each node. Moreover, the lifetime of the whole network will be increased. The base station determines the path cycle using the fuzzy rule-based system. The performance of the proposed method is demonstrated using simulation studies with the three methods.

关键词： Wireless Sensor Network Secure Path Cycle Selection Statistical En-route Filtering Path Selection Method Fuzzy System

An Improved Harnack Inequality for Dirichlet Eigenvalues of Abelian Homogeneous Graphs

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Journal of Mathematical Research with Applications 2014年第6期34卷 640-646页

作者： Shoudong man Department of Mathematics School of Information Renmin University of China

In this paper, we prove an improved Harnack inequality for Dirichlet eigenfunctions of abelian homogeneous graphs and their convex subgraphs. As a consequence, we derive a lower estimate for Dirichlet eigenvalues usin... 详细信息

关键词： Laplace operator Harnack inequality eigenvalue estimate

奔向全球的经济地理:战略耦合与全球生产网络研究——“全球生产网络与中国战略耦合”专辑序言

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地理研究 2021年第12期40卷 3253-3258页

作者：楊偉聰刘逸(译) 新加坡国立大学地理系与全球生产网络研究中心新加坡117570 不详

进入21世纪以来,全球生产网络(Global Production Network,GPN)研究非常深刻地展现了Peter Dicken所描绘的"全球-地方矛盾"。这个概念由Dicken在1994年发表于《Economic Geography》上的Roepke Lecture特邀文章中首次提出;。作为过去20多年经济地理学的一个主要学术支柱,GPN研究经历了两个重要的理论发展阶段,即从早期的广泛而一般的GPN框架[2-4],过渡到更加具备解释性的GPN 2.0理论;。

关键词：全球生产网络经济地理学战略耦合解释性

Process Window Determination for Biofiltration by the Taguchi Method

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Journal of Water Resource and Protection 2012年第10期4卷 831-837页

作者： man chung Law Hong Chua Ka Po Cheng Chi Wai Kan Department of Civil and Structure Engineering The Hong Kong Polytechnic University Hong Kong Chin Department of Civil and Structure Engineering The Hong Kong Polytechnic University Hong Kong China Department of Industrial Centre The Hong Kong Polytechnic University Hong Kong China Department of Institute of Textiles and Clothing The Hong Kong Polytechnic University Hong Kong China

Raw water from the Yantian Reservoir in Southern China was used for this study. Several process parameters of biofiltration, temperature, media, empty bed contact time, ozone dosage and concentration of geosmin and MIB, were adopted in order to determine their effects. Experiments were conducted using the Taguchi method and 9 experiments were needed to obtain the best process parameter settings and parameter effects. The results of these experiments indicate the use of biological filtration as a method of geosmin and MIB removal, to be satisfactory. In addition, the results show that temperature impacts the removal rate of both geosmin and MIB. Useful insights into the effects of the filter media on such as, empty bed contact time, ozone dosage and concentration of geosmin and MIB were also obtained.

关键词： Taste and Odor Water Quality Design of Experiment Taguchi Method

Simultaneous harvesting and cell disruption of microalgae using ozone bubbles:optimization and characterization study for biodiesel production

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Frontiers of Chemical Science and Engineering 2021年第5期15卷 1257-1268页

作者： Wan N.A.Kadir man K.Lam Yoshimitsu Uemura Jun W.Lim Peck L.Kiew Steven Lim Siti S.Rosli chung Y.Wong Pau L.Show Keat T.Lee Chemical Engineering Department Universiti Teknologi PETRONASSeri Iskandar32610Malaysia HICoE-Centre for Biofuel and Biochemical Research Institute of Self-Sustainable BuildingUniversiti Teknologi PETRONASSeri Iskandar32610Malaysia NPO Kuramae Bioenergy Tokyo108-0023Japan Fundamental and Applied Sciences Department Universiti Teknologi PETRONASSeri Iskandar32610Malaysia Faculty of Engineering Technology&Built EnvironmentUniversity College Sedaya InternationalCheras Kuala Lumpur56000Malaysia Department of Chemical Engineering Lee Kong Chian Faculty of Engineering and ScienceUniversiti Tunku Abdul RahmanSungai LongSelangor43000Malaysia Department of Chemical and Environmental Engineering Faculty of Science and EngineeringUniversity of Nottingham MalaysiaSemenyih43500Malaysia School of Chemical Engineering Universiti Sains MalaysiaEngineering CampusNibong Tebal14300Malaysia

In the present study, ozone was introduced as an alternative approach to harvest and disrupt microalgae cells (Chlorella vulgaris) simultaneously for biodiesel production. At the optimum ozonation conditions (6.14 g·h^(−1) ozone concentration, 30 min ozonation time, 1 L·min^(−1) of ozone flowrate at medium pH of 10 and temperature of 30℃), the sedimentation efficiency of microalgae cells increased significantly from 12.56% to 68.62%. It was observed that the microalgae cells aggregated to form flocs after pretreated with ozone due to the increment of surface charge from −20 to −6.59 mV. Besides, ozone had successfully disrupted the microalgae cells and resulted in efficient lipid extraction, which was 1.9 times higher than the control sample. The extracted microalgae lipid was mainly consisted of methyl palmitate (C16:0), methyl oleate (C18:1) and methyl linolenate (C18:3), making it suitable for biodiesel production. Finally, utilization of recycled culture media after ozonation pre-treatment showed robust growth of microalgae, in which the biomass yield was maintained in the range of 0.796 to 0.879 g ·h^(−1) for 5 cycles of cultivation.

关键词： microalgae biodiesel ozonation pre-treatment lipid

Regional trauma system development in Shenzhen,China:an 8-year journey

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Military Medical Research 2022年第3期9卷 385-386页

作者： Gui-Xi Zhang Gilberto Ka Kit Leung chung Mau Lo Richard Kwong-Yin Lo John Wong Ronald V. Maier Eileen M.Bulger Joe King man Fan Xiao-Bing Fu Chinese PLA Medical School Beijing100853China University of Hong Kong-Shenzhen Hospital Shenzhen518000China Faculty of Medicine University of Hong Kong Li Ka ShingHong Kong999077China Harborview Medical Center SeattleWA98195USA Medical Innovation Research Department and 4th Medical Center Chinese PLA General Hospital and Chinese PLA Medical SchoolBeijing100853China

Dear Editor,Since the late 1980s, trauma in China has been identified as a major public health challenge, with trafic-related fatalities accounting for 80% of accidental deaths[1]. In 2019, Shenzhen had a total population of approximately 20 million, and from 2010 to 2017, both emergency medical services and the total number of trauma patients increased, with trauma accounting for 47.0% and 38.4% of all patients in 2010 and 2017, respectively[2,3]. This report describes the efforts to implement programs and establish a trauma system in Shenzhen, China.

关键词： system services accounting

Application of Expert Systems to Network management in Hong Kong

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Application of Expert Systems to Network Management in Hong ...

An easy PCR-based genome-walking method for getting the unknown 5’flanking region of a Scenedesmus sp.

1996 International Conference on Information Infrastructure(ICII’96)

作者： Chan man-chung Marcus S.K.Lam Dept of Computing Hong Kong Polytechnic University

＜正＞Telecommunication network is a complex aggregate of electronic switches and transmission over which customer’s messages,data and control signals are *** plays an important role in social functions especially for where the business and commercial activifies are frequent and ***,it is of essence to ensure that the network operates in an efficient and relinble manner with proper ***,the traditional method of performing network management iS much dependent on network managers whose performances are relied on their capabilities,expertise and *** the network is increasing its complexitv and fiexibility to cater for more and more customer-oriented environment,the way is becoming hard to achieve the management targets. ThiS paper tries to explore the feasibility of applying expert sytems to network management in Hong Kong because she,as the comlllercial centre in South-East Asia,has a well-developed network infrastructure to support the daily functions of the *** writer’S viewpoint,it is worth to step forward to see,not only the benefits yielded from the applications but also the fact that the current platform used in nehvork management function is appropriate to be upgraded without too much investment and modifications.

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Journal of Coastal Life Medicine 2015年第5期 348-351页

作者： Ahmed Elsayed Gomma Jin man Kim Seung Hwan Yang Gyuhwa chung Department of Biotechnology Chonnam National UniversityYeosuChonnam 550-749Korea Center for Nutraceutical and Pharmaceutical Materials Myongji UniversityCheoin-guYonginGyeonggi-Do 449-728Korea

Objective:To develop the current single primer PCR-based genome-walking method with Scenedesmus ***:The unknown 5’and/or 3’flanking regions for a specific conserved sequence were optimized and the current single primer PCR-based genome-walking method were *** was between the related species of microalga and Scenedesmus *** 18S rDNA,we selected the species Scenedesmus sp.,Chlorella sp.,and Chlamydomonas *** the rbcL gene from the chloroplast genome,alignment was done between Scenedesmus sp.,and Chlamydomonas ***:Obtaining a small conserved sequence for any gene family is something that can be achieved quite ***,identifying the whole gene is often *** investigating and testing,some of the current protocols using to get the unknown 5’and/or 3’flanking regions for a specific conserved sequence,we developed the current single primer PCR-based genome-walking *** performed two consecutive PCR reactions;band extraction and the PCR product were *** got our results by testing the method on three genes from the total DNA of Scenedesmus sp.;two genes had a fully known sequence in gene bank(18S rDNA and rbcL),but the third one has not yet been identified(rbcS).We designed our primers based on the alignment between the related species and to each *** also tested two different DNA polymerases Ex Taq and TLA ***:Results from our study suggest that Ex Taq is the most suitable polymerase for the current protocol.

关键词： Single primer PCR PCR-based genome-walking rbcS rbcL 18S rDNA 5’flanking region Ex Taq TLA polymerase

简易一锅合成新型5-取代P,O-型吲哚膦配体及其应用于钯催化芳基氯Suzuki-Miyaura偶联反应

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有机化学 2020年第10期40卷 3338-3346页

作者：梁文斌杨宗潮蔡珮盈苏秋铭邝福儿香港中文大学化学系香港香港理工大学应用生物及化学科技系香港

从容易获得且便宜的原材料出发,通过简单的一锅式组装方法合成了一种新的P,O-型吲哚基膦配体,并将其用于钯催化的芳基氯Suzuki-Miyaura交叉偶联反应,结果显示配体上的“取代基”能促进该反应的活性,其钯催化剂载量可降至0.01 mol%.

关键词：钯配体设计交叉偶联膦 P O-型配体

Dietary exposure to di-isobutyl phthalate increases urinary 5-methyl-2′-deoxycytidine level and affects reproductive function in adult male mice

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Journal of Environmental Sciences 2017年第11期29卷 14-23页

作者： Yitao Pan Xiaoyang Wang Leo W.Y.yeung Nan Sheng Qianqian Cui Ruina Cui Hongxia Zhang Jiayin Dai Key Laboratory of Animal Ecology and Conservation Biology Institute of Zoology Chinese Academy of Sciences Beijing 100101 China University of Chinese Academy of Sciences Beijing 100049 China man-Technology-Environment Research Centre (MTM) School of Science and Technology Orebro University Orebro SE -70182 Sweden

Phthalates are a large family of ubiquitous environmental pollutants suspected of being endocrine disruptors. Epidemiological studies have associated phthalate metabolites with decreased reproductive parameters and linked phthalate exposure with the level of urinary 5-methyl-2′-deoxycytidine（5mdC, a product of methylated DNA）. In this study, adult male mice were exposed to 450 mg di-isobutyl phthalate（DiBP）/（kg·day） via dietary exposure for 28 days. Mono-isobutyl phthalate（Mi BP, the urinary metabolite） and reproductive function parameters were determined. The levels of 5mdC and 5-hydroxymethyl-2′-deoxycytidine（5hmdC） were measured in urine to evaluate if their contents were also altered by DiBP exposure in this animal model. Results showed that DiBP exposure led to a significant increase in the urinary 5mdC level and significant decreases in sperm concentration and motility in the epididymis, accompanied with reduced testosterone levels and downregulation of the P450 cholesterol side-chain cleavage enzyme（P450scc） gene in the mice testes. Our findings indicated that exposure to DiBP increased the urinary 5mdC levels,which supported our recent epidemiological study about the associations of urinary 5mdC with phthalate exposure in the male human population. In addition, DiBP exposure impaired male reproductive function, possibly by disturbing testosterone levels; P450scc might be a major steroidogenic enzyme targeted by DiBP or other phthalates.

关键词： Di-isobutyl phthalate(DiBP) 'Reproductive function' 5-Methyl-2′-deoxycytidine(5mdC) 'Testosterone 'Deoxyribonucleic acid(DNA) methylation