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Antiplane response of isosceles triangular hill to incident SH waves

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Earthquake Engineering and Engineering Vibration 2005年第1期4卷 37-46页

作者：邱发强刘殿魁 School of Civil Engineering Harbin Engineering University Harbin 150001 ChinaPh.D.Candidate School of Civil Engineering Harbin Engineering University Harbin 150001 China Professor

In this paper, antiplane response of an isosceles triangular hill to incident SH waves is studied based on the method of complex function and by using moving coordinate system. The standing wave function, which can satisfy the governing equation and boundary condition, is provided. Furthermore, numerical examples are presented; the influences of wave number and angle of the incident waves and the angle of the hill’s peak on ground motion are discussed.

关键词： Boundary conditions Function evaluation Mathematical models Problem solving Scattering Stiffness Stresses Surfaces Complex functions Isosceles triangular hill Moving coordinate system Scattering of SH waves

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Evaluation of fire smoke control in underground space

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Underground Space 2022年第3期7卷 295-310页

作者： Anastasios Kallianiotis despina Papakonstantinou Ilias CTolias Andreas Benardos Mining Engineer Ph.D.School of Mining&Metallurgical EngineeringNational Technical University of AthensGreece Mineral Resources Engineer Ph.D.CandidateSchool of Mining&Metallurgical EngineeringNational Technical University of AthensGreece Mechanical Engineer Ph.D.National Centre for Scientific Research“Demokritos”Greece Assistant Professor School of Mining and Metallurgical EngineeringTechnical University of AthensGreece

The main goal of the fire management strategy is to avoid people interaction with fire hazards,therefore several studies are carried out for optimal escape route planning as well as smoke management and mechanical ventilation *** spaces are a special case of study due to their technical characteristics that create different fire spread conditions compared to conventional *** this paper,a comparative study on the fire smoke propagation is carried out taking into account the use and performance of smoke mitiga-tion *** Underground Hazardous Waste Management Repository of Lavrion Technological and Cultural Park in Greece,is selected as a case study to achieve the paper objectives.A Computer Fluid dynamic software is used to simulate various fire scenarios based on the specific characteristics of the underground *** that have significant impact on evacuation procedure and human health such as visibility and carbon monoxide concentration are ***,the results are presented and an evaluation method is proposed based on evacuation simulation results,in order to predict the impact of the smoke control design on the conditions inside the underground *** results reveal that the ventilation shaft(passive system)offers an effective smoke control without any other combined control system and that the installation of smoke curtains,which are activated on time,offers significant improvement on smoke spread control extending the available egress time(ASET)in case of fire.

关键词： Fire smoke mitigation Underground space safety Personnel safety

Effect of humic acids and sunlight on the cytotoxicity of engineered zinc oxide and titanium dioxide nanoparticles to a river bacterial assemblage

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Journal of Environmental Sciences 2013年第9期25卷 1925-1935页

作者： Thabitha P.dasari Huey-Min Hwang Environmental Science ph.d. Program Jackson State University department of Biology Jackson State University

The effect of a terrestrial humic acid （HA） and Suwannee River HA on the cytotoxicity of engineered zinc oxide nanoparticles （ZnONPs） and titanium dioxide nanoparticles （TiO2NPs） to natural aquatic bacterial assemblages was measured with spread plate counting. The effect of HA （10 and 40 ppm） on the cytotoxicity of ZnONPs and TiO2NPs was tested factorially in the presence and absence of natural sunlight （light irradiation （LI））. The experiment was of full factorial, completely randomized design and the results were analyzed using the General Linear Model in SAS analytical software. The method of least squares means was used to separate the means or combinations of means. We determined the mechanism of toxicity via measurements of oxidative stress and metal ions. The toxicity of ZnONPs and TiO2NPs to natural aquatic bacterial assemblages appears to be concentration dependent. Moreover, the cytotoxicity of ZnONPs and TiO2NPs appeared to be affected by HA concentration, the presence of sunlight irradiation, and the dynamic multiple interactions among these factors. With respect to light versus darkness in the control group, the data indicate that bacterial viability was inhibited more in the light exposure than in the darkness exposure. The same was true in the HA treatment groups. With respect to terrestrial versus Suwanee River HA for a given nanoparticle, in light versus darkness, bacterial viability was more inhibited in the light treatment groups containing the terrestrial HA than in those containing Suwanee River HA. differences in the extent of reactive oxygen species formation, adsorption/binding of ZnONPs/TiO2NPs by HA, and the levels of free metal ions were speculated to account for the observed cytotoxicity. TEM images indicate the attachment and binding of the tested nanoparticles to natural bacterial assemblages. Besides the individual parameter, significant effects on bacterial viability count were also observed in the following combined treatments： HA-Zn

关键词： natural bacterial assemblages humic acid median lethal concentration (LC50 ) reactive oxygen species

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New Challenges to Urbanization in China

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Chinese Business Review 2004年第9期3卷 76-81页

作者： Zhao Li Shujian Wang ph.d. candidate School of Economics and Finance of Xi＇an Jiaotong University ph.d. candidate of School of Economics and Finance of Xi＇an liaotong University

With reform, Chinese urbanization makes an obvious progress. The urban quantity, urban scale, and urban population become more and more. Urban economy has ：become a more important component of the national economy. However, the process of urbanization is either in theory or in practice continually faced with serious new challenge. It is a focus on urban development in China.

关键词： urbanization urban governance institution

An Introduction to 2-CCd digital Particle Image Velocimetry System and Its Application in Ocean Engineering

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China Ocean Engineering 1997年第3期12卷 347-356页

作者： daichin Timothy P.dewhirst ph.d.candidate State Key Laboratory of Coastal and Offshore EngineeringDalian University of Technology(DUT)Dalian 116023Ph.D.CandidateDepartment of PhysicsUniversity of EdinburghEdinburghUK.

The basic principle of particle image velocinmetry (PIV) is described. When a PIV image is analyzed by the method of auto-correlation, there is a direction ambiguity of 180 degrees iii velocity measurement. The problem can be solved by using 'Image Shifting Technique', but this makes devices much complicated and difficult to control. A new arrangement of 2-CCd (Charge Coupled device) fully digitized PIV system, which can also solve the problem successfully, is introduced in the paper. As an example of application of the system, an experimental result of flow field around a horizontal cylinder in wave is presented.

关键词： particle image velocimetry CCd camera cross-correlation

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PERMEABILITY ANd CONSOLIdATION OF SEdIMENT MIXTURES AS FUNCTION OF SANd CONTENT ANd CLAY MINERALOGY

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International Journal of Sediment Research 2007年第3期22卷 180-187页

作者： W. JACOBS W. G. M. VAN KESTEREN J. C. WINTERWERP ph. d candidate Delft University of Technology Delft the Netherlands M. Sc. WL|Delft Hydraulics the Netherlands Ms. C. ph.d. Delft University of Technology and WL|Delft Hydraulics the Netherlands

The current study is the first step in a systematic experimental research on the erosion behaviour of sand-mud mixtures. It concerns the effect of a varying sand content and clay mineralogy on the porosity, structure, strength and permeability of artificially generated sediment mixtures. The permeability of a sediment mixture is an especially significant parameter concerning the type of erosion that occurs. It determines if the erosion of the bed is either a drained or an undrained process, respectively indicating surface erosion or mass erosion. Measurements on various mixtures concerning the consolidation coefficient and the permeability have been executed. Results show a distinct transition of behaviour between a sand-silt dominated network structure and a clay-water matrix. The occurrence of these two types of structures appears to depend on the porosity of the volume fraction of sand related to silt, which is, therefore, an important parameter concerning the type of erosion. Finally, the study provides a valuable data set that can be used as a reference for following stages of this research on the erosion behaviour of natural cohesive sediments.

关键词： Cohesive sand-mud mixtures Erosion Consolidation Permeability Compressibility

On the formation of couplet-style stratifications

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International Journal of Sediment Research 2008年第1期23卷 85-91页

作者： Yu-Hai WANG1, Yan-Hong WANG2, and Li-Qun TANG31 ph.d., Engineer, department of Sediment Research, China Institute of Water Resources and Hydropower Research, Chegongzhuangxilu 20, Beijing 100044, China, 2 ph.d., Engineer, Nanjing Hydraulic Research Institute, Hujuguanlu 34, Nanjing 210024, China 3 ph.d., Prof., department of Sediment Research, China Institute of Water Resources and Hydropower Research, Chegongzhuangxilu 20, Beijing 100044, China ph.d. Engineer Department of Sediment Research China Institute of Water Resources and Hydropower Research Chegongzhuangxilu 20 Beijing 100044 China ph.d. Engineer Nanjing Hydraulic Research Institute Hujuguanlu 34 Nanjing 210024 China ph.d. Prof. Department of Sediment Research China Institute of Water Resources and Hydropower Research Chegongzhuangxilu 20 Beijing 100044 China

Couplet-style stratifications refer to the sedimentary sequences that consist of alternating coarse-grain-dominated bed and fine-grain-dominated bed, with or without a sandwiched middle-sized bed. The formation mechanism is complicated due to the interplays of varying driving force (s), sediment supply & transport and topographic configurations. This paper presents a comprehensive overview of such characteristic bedforms, which emerge during the transport and deposition of non-uniform sediments. The leading formative models include water-stage variation, gravel-overpassing process, superimposition of bedload sheets and avalanching process (inverse grading). Each process might produce similar or distinct sedimentological features with respect to grading, matrix content, grain attitude, bounding faces between beds and internal longitudinal/transverse geometry. The couplet-style stratified strata might play an active role in landscape evolution.

关键词： Couplet-style stratification Formative model Sedimentological features Landform

RULE OF LAW IN CHINA-- LEGISLATION REASONING ANd ENFORCEMENT OF ANTI-MONOPOLY LAW IN CHINA ANd THE WEST

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Frontiers of Law in China-Selected Publications from Chinese Universities 2013年第4期8卷 689-767页

作者： TsuI Tat Chee ph.d.candidate at the Trinity College Dublin Dublin Ireland

It is a long debate over whether rule of law is reliable in China, when some Chinese regulations are considered to be decided for political interests rather than the law itself. Furthermore, Chinese court decisions are often criticized for not according with statutes, even though the latter are properly written. The author examines these issues by comparing the legislation reasoning and enforcement of competition law in China, the European Union and the United States, which will not lead to endorsement of or objection to the view that rule of law is properly enforced in China, but it shall be an inevitable responsibility for the Chinese judiciary to demonstrate efforts it has taken.

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AN EXAMINATION OF LEGAL REGULATIONS FOR INSIdER dEALING IN THE UK ANd THE LESSONS FOR CHINA

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Frontiers of Law in China-Selected Publications from Chinese Universities 2017年第4期12卷 524-560页

作者： ZHENG Weiwei ph.d. School of Law Jilin University of China Changchun China

The UK＇s position as a leading international financial center depends not only on the openness and competitiveness of its market, but also on its reputation as a clean and fair place to do business. Market confidence will be undermined where participants and users believe markets are susceptible to abuse. Thus, the main convincing justification for controlling insider＇s abuse of power is based on the harm principle, which it causes to investor confidence and securities markets. An insider ought not to be able to take advantage of his position either to breach a confidence or to achieve an unfair advantage in the market place; particularly the market place should, as far as possible, provide equality of opportunity to people entering it. Insider dealing has been regulated by the criminal law involved under Part V of the Criminal Justice Act 1993 in the UK. It has become clear that the traditional criminal penalty was limited by the criminal standard of proof required, while self-regulatory regimes are thought as toothless tigers. Although various potential common law civil remedies for breach of fiduciary duty and breach of confidence relating to insider dealing do exist, they are ineffective remedies and beset by so many complexities. As a response, the Financial Services and Markets Act 2000 came into force and marked an important development in the regulation of market abuse in creating civil penalties, which also contained misuse of confidential insider information. Later, the main substantive changes to existing civil market abuse regime have been taken effect within the Financial Services and Markets Act 2000 （Market Abuse） Regulations 2005, 2011 and 2014. Regarding to the regulatory framework, the range of regulatory powers of the Financial Services Authority, which has been replaced by the Financial Conduct Authority in April 1, 2013, available in combating market abuse is one of the most fundamental innovations of the FSMA 2000 and plays a significant role i

关键词： insider dealing criminal prosecution civil penalty regulatory sanction marketabuse