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Evaluation of Growth and Quality in Latuca Sativa L. under Different Photoperiods

当代农业（中英文版） 2016年第2期5卷 8-12页

作者： K.W.Lam J.C.W.Pang K.H.Loo y.m.lai S.y.Chau Department of Electronic and Information Engineering The Hong Kong Polytechnic University Hong Kong SAR China Pong yuen Holdings Limited Hong Kong SAR China

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网络犯罪分析：用户及系统的多视图分析方法

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中国司法鉴定 2012年第5期 59-65页

作者：邹锦沛何思乐许志光姚兆明黎耀明许榕生麦永浩范晓曦香港大学计算机系香港999077 中国科学院高能物理研究所北京100039 湖北警官学院武汉430034

近年来网络犯罪数量呈快速上升的势头,但是却缺乏一种有效的取证方法来处理这些案件。调查人员通常依靠调查大量繁琐的源代码来了解犯罪模型及提取证据,但这种方式需要很多的人力与时间,并可能导致人为错误。为了克服调查人员可能出现... 详细信息

近年来网络犯罪数量呈快速上升的势头,但是却缺乏一种有效的取证方法来处理这些案件。调查人员通常依靠调查大量繁琐的源代码来了解犯罪模型及提取证据,但这种方式需要很多的人力与时间,并可能导致人为错误。为了克服调查人员可能出现的这些潜在错误,我们在本文中提出了一种半自动的方法来解决这些问题。该方法集成了用户视图（基于取证调查人员的高级别研究）和系统视图（基于对源代码的自动分析）,来帮助调查人员精确调查的范围。本文应用此方法分析了一个真实案件,证明了方法的可行性,同时帮助调查人员高效地确定了调查范围和犯罪模型。可见这种半自动方法可以对大量有多个来源的电子证据进行有效分析,提高了网络犯罪案件取证的效率和可靠性。

关键词：网络犯罪分析电子取证方法半自动方法

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Pushover analysis of reinforced concrete frames considering shear failure at beam-column joints

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Earthquake Engineering and Engineering Vibration 2013年第3期12卷 373-383页

作者： y.C.Sung T.K.Lin C.C.Hsiao m.C.lai Bridge Division Center for Research on Earthquake EngineeringTaipei University of Technology (NTUT) Chiao Tung University Taipei University of Technology (NTUT)

Since most current seismic capacity evaluations of reinforced concrete （RC） frame structures are implemented by either static pushover analysis （PA） or dynamic time history analysis, with diverse settings of the plastic hinges （PHs） on such main structural components as columns, beams and walls, the complex behavior of shear failure at beam-column joints （BCJs） during major earthquakes is commonly neglected. This study proposes new nonlinear PA procedures that consider shear failure at BCJs and seek to assess the actual damage to RC structures. Based on the specifications of FEmA-356, a simplified joint model composed of two nonlinear cross struts placed diagonally over the location of the plastic hinge is established, allowing a sophisticated PA to be performed. To verify the validity of this method, the analytical results for the capacity curves and the failure mechanism derived from three different full-size RC frames are compared with the experimental measurements. By considering shear failure at BCJs, the proposed nonlinear analytical procedures can be used to estimate the structural behavior of RC frames, including seismic capacity and the progressive failure sequence of joints, in a precise and effective manner.

关键词： RC frame beam-column joint pushover analysis capacity curve plastic hinge performance-based seismic evaluation

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Anisotropic Inter-granular Corrosion Behaviors and microstructures of AlmgSiCu Alloy Sheets made by Thermal–mechanical Treatments

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Acta metallurgica Sinica(English Letters) 2022年第2期35卷 275-284页

作者： L.m.Liu y.X.lai C.L.Wu Z.Zhang J.H.Chen Center for High-Resolution Electron microscopy College of Materials Science and EngineeringHunan UniversityChangsha 410082China

This study investigates the microstructure and local corrosion behavior of an Al-mg-Si-Cu alloy,which has been subjected to cold-rolling with different deformation strain ratios(DSRs)and followed by artificial *** corrosion tests show that peak-aged samples with a small DSR(5-10%)are sensitive to inter-granular corrosion(IGC)along both the normal and rolling *** the DSR increases to medium strength(20-40%),IGC sensitivity decreases along both directions and corrosion propagates *** the DSR is 60-80%,IGC sensitivity along the normal direction continues to decrease,but increases along the rolling direction,indicating pronounced corrosion *** characterization reveals the decreased IGC sensitivity is mainly attributed to a reduction in element segregation at high-angle grain boundaries and the kinked and discontinuous grain boundary corrosion *** increased IGC sensitivity along the rolling direction could be related to the significantly flattened grains.

关键词： Al alloys Local corrosion Anisotropy Transmission electron microscopy(TEm) Electron backscattering diffraction(EBSD)

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Structures and formation mechanisms of dislocation-induced precipitates in relation to the age-hardening responses of Al-mg-Si alloys

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Journal of materials Science & Technology 2020年第6期41卷 127-138页

作者： y.X.lai W.Fan m.J.yin C.L.Wu J.H.Chen Center for High-Resolution Electron microscopy College of Materials Science&EngineeringHunan UniversityChangsha 410082China Electron microscopy Center Shenzhen UniversityShenzhen 518060China

In the slightly deformed Al-mg-Si alloys,dislocation-induced precipitates are frequently observed,and they usually line up,forming sophisticated precipitation *** atomic-resolution electron microscopy in association with hardness measurements,we systematically investigated these precipitates in relation to the age-hardening responses of the *** study reveals that the majority of dislocation-induced complex precipitates are actually short-range ordered while long-range disordered polycrystalline precipitates and multiphase composite precipitates,including polycrystalline U2 precipitates,B’/U2,B’-2/U2,B’/B’-2/U2 and’/U2 composite *** is suggested that the formation of these complex precipitates is mainly owing to a high nucleation rate and rapid growth of different precipitate phases parallel to the associated dislocation *** dislocation-induced precipitates consume more mg than Si from the matrix and have a high formation kinetics,they will have different impacts on the matrix precipitation in different types of Al-mg-Si *** results further demonstrate that for the"normally-β"-hardened"alloy,their formation leads to a coarser precipitate microstructure in the matrix,whereas for the"normally-β’-hardened"alloy,their formation reverses the precipitation pathway in the matrix,resulting in a reduced age-hardening potential of the former alloy and an improved age-hardening potential of the latter alloy.

关键词： Al-mg-Si alloys Precipitation Dislocation Age-hardening Electron microscopy

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Parallelized volumetric fluorescence microscopy with a reconfigurable coded incoherent light-sheet array

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Light(Science & Applications) 2020年第1期9卷 1914-1924页

作者： yu-Xuan Ren Jianglai Wu Queenie T.K.lai Hei ming lai Dickson m.D.Siu Wutian Wu Kenneth K.y.Wong Kevin K.Tsia Department of Electrical and Electronic Engineering The University of Hong KongPokfulam RoadHong KongSAR 999077China Department of Physics University of CaliforniaBerkeleyCA 94720USA School of Biomedical Sciences Li Ka Shing Faculty of MedicineThe University of Hong KongHong KongSAR 999077China Department of Psychiatry Faculty of MedicineThe Chinese University of Hong KongHong KongSAR 999077China GHm Institute of CNS Regeneration Jinan University601 Huangpu Avenue WestGuangzhou 510632China Re-Stem Biotechnology Suzhou 215007China

Parallelized fluorescence imaging has been a long-standing pursuit that can address the unmet need for a comprehensive three-dimensional(3D)visualization of dynamical biological processes with minimal ***,the available approaches are limited to incomplete parallelization in only two dimensions or sparse sampling in three *** hereby develop a novel fluorescence imaging approach,called coded light-sheet array microscopy(CLAm),which allows complete parallelized 3D imaging without mechanical *** the concept of an“infinity mirror”,CLAm generates a light-sheet array with controllable sheet density and degree of ***,CLAm circumvents the common complications of multiple coherent light-sheet generation in terms of dedicated wavefront engineering and mechanical dithering/***,the encoding of multiplexed optical sections in CLAm allows the synchronous capture of all sectioned images within the imaged *** demonstrate the utility of CLAm in different imaging scenarios,including a light-scattering medium,an optically cleared tissue,and microparticles in fluidic *** can maximize the signal-to-noise ratio and the spatial duty cycle,and also provides a further reduction in photobleaching compared to the major scanning-based 3D imaging *** flexible implementation of CLAm regarding both hardware and software ensures compatibility with any light-sheet imaging modality and could thus be instrumental in a multitude of areas in biological research.

关键词： scattering light mirror

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Effect of drainage on CO_2, CH_4, and N_2O fluxes from aquaculture ponds during winter in a subtropical estuary of China

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Journal of Environmental Sciences 2018年第3期30卷 72-82页

作者： Ping yang Derrick y.F lai Jia F.Huang Chuan Tong School of Geographical Sciences Fujian Normal University Key Laboratory of Humid Sub-tropical Eco-geographical Process of ministry of Education of China Fujian Normal University Department of Geography and Resource management and Centre for Environmental Policy and Resource ManagementThe Chinese University of Hong Kong

Aquaculture ponds are dominant features of the landscape in the coastal zone of ***,aquaculture ponds are drained during the non-culture period in ***,the effects of such drainage on the production and flux of greenhouse gases（GHGs）from aquaculture ponds are largely *** the present study,field-based research was performed to compare the GHG fluxes between one drained pond（DP,with a water depth of 0.05 m）and one undrained pond（UDP,with a water depth of 1.16 m）during one winter in the min River estuary of southeast *** the entire study period,the mean CO2flux in the DP was（0.75±0.12）mmol/（m^2·hr）,which was significantly higher than that in the UDP of（-0.49±0.09）mmol/（m^2·hr）（p0.01）.This indicates that drainage drastically transforms aquaculture ponds from a net sink to a net source of CO2in *** CH4and N2O emissions were significantly higher in the DP compared to those in the UDP（CH4=（0.66±0.31）vs.（0.07±0.06）mmol/（m^2·hr）and N2O=（19.54±2.08）vs.（0.01±0.04）μmol/（m^2·hr））（p〈0.01）,suggesting that drainage would also significantly enhance CH4and N2O *** in environmental variables（including sediment temperature,p H,salinity,redox status,and water depth）contributed significantly to the enhanced GHG emissions following pond ***,analysis of the sustained-flux global warming and cooling potentials indicated that the combined global warming potentials of the GHG fluxes were significantly higher in the DP than in the UDP（p〈0.01）,with values of739.18 and 26.46 mg CO2-eq/（m^2·hr）,*** findings suggested that drainage of aquaculture ponds can increase the emissions of potent GHGs from the coastal zone of China to the atmosphere during winter,further aggravating the problem of global warming.

关键词： Aquaculture pond Drainage management Greenhouse gas flux Global warming min River estuary

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EFFECT OF STRUCTURAL PARAmETERS ON THE THERmAL STRESS OF A NiFe_(2)O_(4)-BASED CERmET INERT ANODE IN ALUmINUm ELECTROLySIS

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Acta metallurgica Sinica(English Letters) 2007年第2期20卷 139-147页

作者： J. Li Z.G. Wang y.Q. lai y.y. Wu S.L. ye School of metallurgy Science and Engineering Central South University Changsha 410083 China

Inert anode has been a hot issue in the aluminum industry for many decades. With the help of FEA （finite element analysis） software ANSyS, a model was developed to simulate the thermal stress distribution working condition of an inert anode. To reduce its thermal stress, the effect of some parameters on the thermal stress distribution was investigated, including the anode height, the anode radius, the hole depth, the hole radius, and the radius of inner chamfer and outer chamfer. The results showed that in the actual working condition of an inert anode, there existed a large axial tensile stress near the tangent interface between the anode and bath, which was the major cause of anode breaking. Increasing the anode height and reducing the hole depth properly seemed to be beneficial for the stress distribution. With the increase of anode radius, the stress distribution became better first and then deteriorated, the reasonable value was between 0.045 to 0.06m. The hole radius had a significant effect on the stress and a smaller radius would reduce the thermal stress. The effect of the radius of the inner chamfer and the outer chamfer was less than other parameters.

关键词： inert anode thermal stress structural parameter aluminum electrolysis

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Conjugated microporous polymer membranes for chemical separations

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Chinese Journal of Chemical Engineering 2022年第5期35卷 1-14页

作者： Zongyao Zhou Zhen Li Lubna m.Rehman Zhiping lai Division of Physical Science and Engineering King Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia

Conjugated microporous polymers(CmPs) are a unique class of porous organic materials, which are constructed with π-conjugation structures leading to intrinsic micropores. The CmPs properties such as high surface area, intrinsic and rich micropores, interlocking and rigid structure, extensive π-conjugation and tunable band-gap, chemical and thermal stability, together with tailored functionalities, contribute to its abundant potential for application in fields such as photocatalysis, optoelectronics, energy storage, and chemical sensors. Recently, CmPs have gained importance in the field of membranes for chemical separation. In this review, we briefly discuss the historical development of CmPs, followed by a detailed description of the progress in state-of-the-art design, preparation, and application of CmPs in membranes. Additionally, we provide inference on the future prospects of CmPs as membranes.

关键词： Conjugated microporous polymer membrane Separation Electropolymerization Film

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Design optimization of a slotless Pm brushless motor with helical edge wound laminations for rim driven thrusters

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High Technology Letters 2010年第1期16卷 70-79页

作者： Sharkh S m lai S H School of Engineering Sciences University of Southampton Highfield Southampton SO17 1BJ UK Applied materials South East Asia Pte Ltd Changi Business Park Vista 486051 Singapore

This paper discusses the analysis and design of a very thin slotless permanent magnet （Pm） brushless motor whose stator laminations are manufactured from a single strip of steel that is edge wound into a spiral （like a ＂Slinky＂） and then fitted over the windings that are preformed on the outside surface of a non-conducting former. Analytical and finite element analysis （FEA） are used to determine the con- strained optimum dimensions of a motor used to drive a rim driven thruster in which the motor rotor is fit- ted onto the rim of the propeller and the stator is encapsulated in the thin Kort nozzle of the thruster. The paper describes the fabrication of a demonstrator motor and presents experimental results to validate the theoretical calculations. Experimental motor performance results are also reported and compared with those of a slotted motor that fits within the same active radial dimensions as the slotless motor. The slotless motor, which has longer active length and endwindings, and thicker magnets than the slotted motor, was found to be less efficient and more expensive （prototype cost） than the slotted machine.

关键词： slotless brushless permanent magnet (Pm) motor edge-wound laminations rim driven thruster

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