检索结果-南通市图书馆

Comparing material wastage levels between conventional in-situ and prefabrication construction in Hong Kong

在线全文

学校读者我要写书评

暂无评论

Journal of Harbin Institute of Technology(New Series) 2004年第5期11卷 548-551页

作者： Vivian W Ytam C M tam L Y Shen Dept. of Building and Construction City University of Hong Kong Hong Kong ChinaDept. of Building and Construction City University of Hong Kong Hong Kong ChinaDept. of Building and Construction City University of Hong Kong Hong Kong China

Generation of construction wastes constitutes a major impact to the environment. Studies have been directed toward reducing wastes of the various construction processes. However, contractors in Hong Kong are rather conservative and lack motivation to develop new technology for waste minimization. This paper examines the benefits of using prefabrication in reducing material wastage levels for some traditional in-situ trades such as concreting, rebar fixing, bricklaying, drywall, plastering, screeding and tiling in Hong Kong. By measuring thirty construction projects, it is been found that waste levels of all major construction trades can be effectively reduced. This is particularly significant in the trade of plastering where 100% saving can be achieved after adopting prefabrication. The standardized design of the building can also be useful in the adoption of prefabrication for private housing projects.

关键词：原材料损耗施工废弃物建筑工业环境保护工程预算

Phase-field lattice Boltzmann model for dendrites growing and moving in melt flow

在线全文

学校读者我要写书评

暂无评论

npj Computational Materials 2019年第1期5卷 140-149页

作者： LászlóRátkai tamás Pusztai LászlóGránásy Wigner Research Centre for Physics P.O.Box 49H-1525 BudapestHungary Brunel Centre of Advanced Solidification Technology Brunel UniversityUxbridgeMiddlesex UB83PHUK

The phase-field and lattice Boltzmann methods have been combined to simulate the growth of solid particles moving in melt *** handle mobile particles,an overlapping multigrid scheme was developed,in which each individual particle has its own moving grid,with local fields attached to *** this approach we were able to simulate simultaneous binary solidification,solute diffusion,melt flow,solid motion,the effect of gravity,and collision of the *** method has been applied for describing two possible modes of columnar to equiaxed transition in the Al–Ti system.

关键词： solidification moving lattice

The mutual interaction between the host spinal cord and grafted undifferentiated stem cells fosters the production of a lesion-induced secretome

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2020年第10期15卷 1844-1845页

作者： Krisztián Pajer tamás Bellák Antal Nógrádi Department of Anatomy Histology and Embryology Faculty of Medicine University of Szeged

Pathophysiology of spinal cord injury:Injury to the spinal cord results in loss of gray and white matter i.e.,it produces a segmental spinal cord lesion and,as a consequence leads to a fatal loss of motor,sensory and autonomic *** cord injuries in humans and other mammals are not followed by the replacement of lost neurons and oligodendrocytes and regrowth of injured axons,instead they lead to permanent,fatal and incurable functional *** primary physical injury is followed by a cascade of tissue-decaying events,called secondary injury,which leads to ischemia,vascular disruption,neuroinflammation,excitotoxicity,demyelination and death of neurons and glial cells(Silva et al.,2014;Figure 1A).The direct mechanical disruption of the vasculature results in the increased permeability of the blood-spinal cord *** to the leakiness of blood-spinal cord barrier and production of cytokines by activated microglia,a number of various immune cells(T lymphocytes,neutrophils and monocytes)invade the injury *** macrophages generate a set of inflammatory cytokines such as tumor necrosis factor-α,interleukin(IL)-1α,IL-1β,and IL-6,which may further augment the secondary events(Ahuja et al.,2017).In addition,a number of other disruptive processes contribute to the heterogeneous and time-sensitive pathophysiology of spinal cord injury.

关键词： mutual Figure injuries

Emerging Jasmonate Transporters

在线全文

学校读者我要写书评

暂无评论

Molecular Plant 2017年第5期10卷 659-661页

作者： Chi tam Nguyen Enrico Martinoia Edward E. Farmer Department of Plant Molecular Biology Biophore University of Lausanne 1015 Lausanne Switzerland Department of Plant and Microbial Biology University of Zurich Zollikerstrasse 107 8008 Zurich Switzerland

Jasmonic acid （JA） and methyl jasmonate （MeJA） are highly mobile and, when applied to intact plants,, these compounds powerfully modulate gene expression. Moreover, activation of jasmonate-responsive genes usually occurs in tissues distal to the treatments. It therefore comes as no surprise that there are jasmonate transporters; these proteins are only now emerging and their discovery is important for a number of reasons. Firstlv.

关键词： Emerging Jasmonate Transporters

Influence of South China Sea SST and the ENSO on Winter Rainfall over South China

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Atmospheric Sciences 2010年第4期27卷 832-844页

作者：周连童 Chi-Yung tam 周文 Johnny C. L. CHAN Center for Monsoon System Research Institute of Atmospheric PhysicsChinese Academy of Sciences CityU-IAP Laboratory for Atmospheric Sciences City University of Hong Kong Guy Carpenter Asia-Pacific Climate Impact Centre School of Energy and EnvironmentCity University of Hong Kong

The present study investigates the influence of South China Sea （SCS） SST and ENSO on winter （January-February-March; JFM） rainfall over South China and its dynamic processes by using station observations for the period 1951-2003, Met Office Hadley Center SST data for the period 1900-2008, and ERA-40 reanalysis data for the period 1958-2002. It is found that JFM rainfall over South China has a sig- nificant correlation with Nio-3 and SCS SST. Analyses show that in El Nio or positive SCS SST anomaly years, southwesterly anomalies at 700 hPa dominate over the South China Sea, which in turn transports more moisture into South China and favors increased rainfall. A partial regression analysis indicates that the independent ENSO influence on winter rainfall occurs mainly over South China, whereas SCS SST has a larger independent influence on winter rainfall in northern part of South China. The temperature over South China shows an obvious decrease at 300 hPa and an increase near the surface, with the former induced by Nio-3 and the latter SCS SST anomalies. This enhances the convective instability and weakens the potential vorticity （PV）, which explains the strengthening of ascending motion and the increase of JFM rainfall over South China.

关键词： ENSO South China Sea SST rainfall convective instability potential vorticity

Coupled modified Kd V equations, skew orthogonal polynomials, convergence acceleration algorithms and Laurent property

在线全文

学校读者我要写书评

暂无评论

Science China Mathematics 2018年第6期61卷 1063-1078页

作者： Xiangke Chang Yi He Xingbiao Hu Shihao Li Hon-wah tam Yingnan Zhang LSEC ICMSEC Academy of Mathematics and Systems ScienceChinese Academy of Sciences School of Mathematical Sciences University of Chinese Academy of Sciences Wuhan Institute of Physics and Mathematics Chinese Academy of Sciences Department of Computer Science Hong Kong Baptist University School of Mathematical Sciences Nanjing Normal University

In this paper, we show that the coupled modified Kd V equations possess rich mathematical structures and some remarkable properties. The connections between the system and skew orthogonal polynomials,convergence accel... 详细信息

关键词：加速算法 KdV 多项式性质修改方程直角数学结构

Using benthic macrofauna to assess environmental quality of four intertidal mudflats in Hong Kong and Shenzhen Coast

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2003年第2期22卷 309-319页

作者： CaiLizhe NoraF.Y.tam TeresaW.Y.Wong MaLi GaoYang Yuk-ShanWong ResearchLabortoryofSEDCofMarineEnvironmentalScience EnivonmentalScienceResearchCenterXiamenUniversityXiamen361005China DepartmentofBiologyandChermistryandCenterforCoastalPollutionControl CityUniversityofHongKongHKSARChina

Intertidal zone is a significant wetland between land and ocean. It plays an important rolein maintaining local ecological balance. Both Mai Po and Futian intertidal mudflats are located in Shenzhen Bay and are important 'refueling' point along the East Asian/Australian flyway of migratory birds. The environmental quality of Mai Po and Futian mudflats have aroused great concern due to rapid economic developments in Hong Kong and Shenzhen in recent decades. Macroinfauna of Mai Po and Futian mudflats was investigated in December 2000 and the faunal data were used to assess their environmental quality. Two other mudflats, namely Ma Wan Typhoon Shelter (a more disturbed area) and Luk Keng intertidal mudflat (a place with relatively less human disturbance), were also sampled for macroinfauna and used as reference mudflats. Shannon - Weaver species diversity index (Isd), biotic coefficient (Cb) and macrofaunal pollution index (Imp) of the macrofauna community on four intertidal mudflats were used to determine their environmental quality. The results showed that Luk Keng intertidal mudflat was unpolluted, Mai Po and Futian mudflats were slightly polluted, and Ma Wan was moderately polluted. The pollution in Ma Wan Typhoon Shelter mainly came from various types of rubbish and fishing boats that disturbed the sediment, while pollution sources in Mai Po and Futian mudflats were discharges of industrial water, municipal sewage and from nearby rivers.

关键词： Biotic index macrofauna intertidal mudflat environmental quality

Error compensation for three-dimensional profile measurement system

在线全文

学校读者我要写书评

暂无评论

Frontiers of Optoelectronics 2015年第4期8卷 402-412页

作者： Xu YE Haobo CHENG Zhichao DONG Hon-Yuen tam School of Optoelectronics Beijing Institute of Technology Beijing 100081 China Department of Mechanical and Biomedical Engineering City University of Hong Kong Hong Kong China

Three-dimensional （3D） profile measurement is an indispensable process for assisting the manufacture of various optic, especially aspheric surfaces. This work presents the measurement error calibration of a 3D profile measurement system, namely PMI700. Measurement errors induced by measuring tool radius, alignment error and the temperature variation were analyzed through geometry analysis and simulation. A quantitative method for the compensation of tool radius and an alignment error compensation model based on the least square method were proposed to reduce the measurement error. To verify the feasibility of PMI700, a plane and a non-uniform hyperboloidal mirror were measured by PMI700 and interferometer, respectively. The data provided by two systems were high coincident. The direct subtractions of results from two systems indicate RMS deviations for both segments were less than 0.22.

关键词： aspheric surface three-dimensional (3D) pro-file measurement alignment error error compensation

Peptide asparaginyl ligases——renegade peptide bond makers

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2020年第3期63卷 296-307页

作者： James P.tam Ning-Yu Chan Heng Tai Liew Shaun J.Tan Yu Chen School of Biological Sciences Nanyang Technological UniversitySingapore 637551Singapore Synzymes and Natural Products Center Nanyang Technological UniversitySingapore 637551Singapore ntU Institute of Structural Biology Nanyang Technological UniversitySingapore 636921Singapore

Making peptide bonds is tightly controlled by genetic code and machinery which includes cofactors,ATP,and *** this regard,the stand-alone and genetic-code-independent peptide ligases constitute a new family of renegade peptide-bond makers.A prime example is butelase-1,an Asn/Asp(Asx)-specific ligase that structurally belongs to the asparaginyl endopeptidase ***-1 specifically recognizes a C-terminal Asx-containing tripeptide motif,Asn/Asp-Xaa-Yaa(Xaa and Yaa are any amino acids),to form a site-specific Asn-Xaa peptide bond either intramolecularly as cyclic proteins or intermolecularly as modified *** work in the past five years has validated that butelase-1 is a potent and versatile *** we review the advances in ligases,with a focus on butelase-1,and their applications in engineering bioactive peptides and precision protein modifications,antibody-drug conjugates,and live-cell labeling.

关键词： asparaginyl endopeptidase Asn-specific ligation bioorthogonal ligation butelase chemoenzymatic ligation live-cell labeling protein engineering protein modification site-specific labeling tandem ligation