检索结果-南通市图书馆

Theoretical analysis of polarization properties for tilted fiber Bragg gratings

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science china(Information Sciences) 2010年第2期53卷 390-397页

作者： XU Ou 1 , LU ShaoHua 2 & JIAN ShuiSheng 2 1 Faculty of Information Engineering, guangdong university of technology, guangzhou 510006, china 2 institute of Lightwave technology, Beijing Jiaotong university, Beijing 100044, china 1. Faculty of Information Engineering Guangdong University of Technology Guangzhou 510006 China2. Institute of Lightwave Technology Beijing Jiaotong University Beijing 100044 China

The polarization properties for tilted fiber Bragg gratings (TFBGs) are investigated theoretically based on coupled-mode theory and Mueller matrix method. The expression of wavelength-related polarizationdependent loss (PDL) for TFBGs with different tilt angles is derived and calculated. Simulation results are compared, and the results indicate that the polarization capability of TFBGs with 45° angle is stronger than other TFBGs with smaller angles. The degree of polarization for unpolarized light passing TFBGs is also simulated to further evaluate the polarization properties for various tilt angles. In addition, the relationship between physical parameters of a TFBG and its polarization capability is discussed.

关键词： coupled-mode theory degree of polarization (DOP) Mueller matrix method polarization dependent loss (PDL) tilted fiber Bragg gratings

林克明旧居修缮与活化利用,广州,广东,中国

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

世界建筑 2024年第8期 64-69页

作者： guangdong Architectural Design and Research institute Group Co.,Ltd. Architectural Design and Research institute of South china university of technology 广东省建筑设计研究院集团股份有限公司华南理工大学建筑设计研究院有限公司

街区断点更新林克明旧居(简称旧居)1935年由中国第一代著名建筑师林克明设计建造。旧居所在的越秀北路原为民国初年广州城墙拆除后的城基路,城外即东濠涌,前后高差达8m。林克明巧妙地利用地形组织功能与空间,并采用摩登建筑理念,使建筑... 详细信息

街区断点更新林克明旧居(简称旧居)1935年由中国第一代著名建筑师林克明设计建造。旧居所在的越秀北路原为民国初年广州城墙拆除后的城基路,城外即东濠涌,前后高差达8m。林克明巧妙地利用地形组织功能与空间,并采用摩登建筑理念,使建筑形体呈现出迷人的风采。

关键词：建筑形体建筑理念活化利用功能与空间著名建筑师林克明修缮城墙

Extension theory and its application

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1999年第17期44卷 1538-1548页

作者： CAI WenResearch institute of Matter-Element Analysis , guangdong university of technology , guangzhou 510090, china Research institute of Matter-Element Analysis Guangdong University of Technology Guangzhou China

The article Extension Set and Non-compatible Problems was published in 1983. It proclaimed the birth of extension theory. Its objects of study are contradictory problems in the realistic world; its theoretical pillars are matter element theory and extension set theory. Its basic methods are extension methods. Its practical methods are extension engineering methods,

关键词： extension theory matter element extension set.

Expression pattern of antibacterial genes in the Musca domestica

在线全文

学校读者我要写书评

暂无评论

Science china(Life Sciences) 2009年第9期52卷 823-830页

作者： WANG Yan1,JIN XiaoBao1,ZHU JiaYong1,ZENG AiHua2,CHU FuJiang1,YANG XiaoRong1 & MA Yan1 1 institute of Pathogen Biology and Department of Pathogen Biology,guangdong Pharmaceutical university,guangzhou 510006,china 2 Department of Pharmacology,guangdong Pharmaceutical university,guangzhou 510006,china institute of Pathogen Biology and Department of Pathogen Biology Guangdong Pharmaceutical University Guangzhou 510006 China Department of Pharmacology Guangdong Pharmaceutical University Guangzhou 510006 China

This work studied the transcriptional patterns of three antibacterial genes,attacin,defensin and cecropin,during the development of Musca domestica. Quantitative analysis by real-time PCR was performed on mRNA levels in different development stages and challenged 3rd-instar larva at different time points after challenge of Musca domestica. The results revealed a predominance of the transcripts of all three genes during the 3rd-instar larvae and the adults. In the meanwhile,it revealed the greatest increase in mRNA. The transcript levels increased to 801 times,1009 times and 2500 times respectively for cecropin,attacin and defensin in 3rd-instar larvae after challenging susceptible bacterium. The results suggested that the transcriptional patterns of Musca domestica antibacterial genes were different during the different growth stages as well as the microbial challenge encountered in 3rd-instar larvae.

关键词： Musca domestica expression pattern attacin defensin cecropin

The Research of Controlling Inclusions in Middle and High Carbon Steel During TSCR

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2011年第S2期18卷 365-370页

作者： LI Lie-jun1, GAO Ji-xiang1,2 (1. School of Mechanical and Automotive Engineering, South china university of technology, guangzhou 510640, guangdong, china 2. CSP applying technology institute, GISE, guangzhou 510730, guangdong,china) S china Univ Technol Sch Mech & Automot Engn Guangzhou 510640 Guangdong Peoples R China GISE CSP Applying Technol Inst Guangzhou 510730 Guangdong Peoples R China

Based on the characteristics of Thin slab casting and rolling (TSCR) process,using test methods such as SEM,EDS and measuring content of inclusions, the influencing factor of controlling inclusions during producing middle and high carbon steel was studied. The technologies of electric furnace smelting, LF refining and controlling inclusions of tundish were proposed. The inclusions control level of middle and high carbon steel in which the carbon content is 0.3-1.0%, The level reached and even exceeded the level of like product producing with conventional process at home and abroad.

关键词： thin slab casting and rolling (TSCR) middle and high carbon steel inclusions

Presence of a long nuclear-localization signal sequence in homeodomain transcription factor Nkx 1.2

在线全文

学校读者我要写书评

暂无评论

Journal of Oceanology and Limnology 2024年第2期42卷 620-626页

作者： Xinyi LI Lihui CHEN Xinyuan WANG Chen SUN guangdong JI Guobin HU Zhenhui LIU College of Marine Life Science and institute of Evolution&Marine Biodiversity Ocean University of ChinaQingdao 266003China Laoshan Laboratory Qingdao 266237China

Homeodomains,a 60-amino acid sequence encoded by 180 nucleotides,are highly conserved DNA-binding motifs that are present in a variety of transcription factors in species ranging from yeast to *** NKX proteins belong to the homeodomain(HD)-containing transcription factor *** play vital roles in the regulation of ***1-2 is one member of the NKX *** present,information about its nuclear localization signal(NLS)sequence is *** studied the NLS sequence of zebrafish Nkx1.2 by introducing sequence changes such as deletion,mutation,and truncation,and identified an NLS motif(QNRRTKWKKQ)that is localized at the C-terminus of the ***,the deletion of two amino acid residues(RR)in this NLS motif prevents Nkx1.2 from entering the nucleus,indicating that the two amino acids are essential for Nkx1.2 nuclear ***,the NLS motif alone is unable to target cytoplasmic protein glutathione S-transferase(GST)to the *** intact homeodomain is necessary for mediating the complete nuclear transport of cytoplasmic *** most nuclear import proteins with short NLS sequences,a long NLS is present in zebrafish *** also demonstrated that the sequences of homeodomain of NKX1.2 are well conserved among different *** study is informative to verify the function of the NKX1.2 protein.

关键词： NKX1.2 NKX protein homeodomain nuclear localization signal(NLS) nuclear transport

Decomposition in AHP with Application to Forecasting

在线全文

学校读者我要写书评

暂无评论

Systems Science and Systems Engineering 1996年第3期6卷 327-334页

作者： ZHANG Qiren(Systems Engineering institute, guangdong university of technology, guangzhou 510090, china)

Several approaches have been proposed to solve the problem existing in ANALYTIC HIERARCHY PROCESS (AHP) as the number of alternatives in one level is sometimes much larger than nine. A new method in terms of decomposition procedure is proposed in this paper. Case study shows that my procedure proposed here is effective and straightforward.

关键词： Decomposition Incomplete Forecasting

NEW VISUAL METHOD FOR FREE-FORM SURFACE REconstructION

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2002年第1期15卷 35-39页

作者： Xiong Hanwei Artificial Intelligence institute，Zhejiang university，Hangzhou 310027，china Zhang Xiangwei guangdong university of technology Artificial Intelligence institute Zhejiang University Hangzhou 310027 China

A new method is put forward combining computer vision with computer aidedgeometric design (CAGD) to resolve the problem of free-form surface reconstruction. The surface isfirst subdivided into N-sided Gregory patches, and a stereo algorithm is used to reconstruct theboundary curves. Then, the cross boundary tangent vectors are computed through reflectance *** last, the whole surface can be reconstructed jointing these patches with G^1 continuity(tangentcontinuity). Examples on synthetic images are given.

关键词： Reverse engineering Free-form surface design Computer vision

A SPLITTING ITERATION METHOD FOR DOUBLE X_0-BREAKING BIFURCATION POINTS

在线全文

学校读者我要写书评

暂无评论

Journal of Computational Mathematics 1998年第3期16卷 267-274页

作者： Rui-song Ye (institute of Mathematics, Shantou university, guangdong 515063, china) institute of Mathematics Shantou University Guangdong 515063 China

A splitting iteration method is proposed to compute double X0-breaking bifurcation points. The method will reduce the computational work and storage, it converges linearly with an adjustable speed. Numerical computat... 详细信息

关键词： Double X0-breaking bifurcation point splitting iteration method extended system