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Chinese Journal of Lasers 1996年第1期B5卷 27-32页

作者： HOU Lantian (Department of Physics,Jilin university,Changchun 130023 china)SUN Yingzhi (Light Communication Department,Changchun Poat and Telecommunication Institte,Changchun 130012,china)ZHAO Bin(Department of Physics,science and technology university of Jilin Univ Changchun China

The transmitting losses of several lower modes for four kinds of straight and bent circular hollow optical fibers （waveguide） made up with GeO2 or SiO2 and doped with PbO or Sb2O3 respectively are calculated. The results show that the HE11 mode has the minimum loss in straight waveguide and the loss of TM01 mode in bent waveguide is the minimun.

关键词： hollow-core optical fiber low-order mode bending loss

3-D consistency dynamic constitutive model of concrete

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Earthquake Engineering and Engineering Vibration 2010年第2期9卷 233-246页

作者： Xiao Shiyun,Li Hongnan and Lin Gao School of Hydraulic Engineering,Dalian university of technology,Dalian 116024,china School of Hydraulic Engineering Dalian University of Technology Dalian China

Based on the consistency-viscoplastic constitutive model,the static William-Warnke model with three-parameters is modified and a consistency-viscoplastic William-Warnke model with three-parameters is developed that considers the effect of strain rates. Then,the tangent modulus of the consistency viscoplastic model is introduced and an implicit backward Elure iterative algorithm is developed. Comparisons between the numerical simulations and experimental data show that the consistency model properly provides the uniaxial and biaxial dynamic behaviors of concrete. To study the effect of strain rates on the dynamic response of concrete structures,the proposed model is used in the analysis of the dynamic response of a simply-supported beam and the results show that the strain rate has a significant effect on the displacement and stress magnitudes and distributions. Finally,the seismic responses of a 278 m high arch dam are obtained and compared by using the linear elastic model,as well as rate-independent and rate-dependent William-Warnke three-parameter models. The results indicate that the strain rate affects the first principal stresses,and the maximal equivalent viscoplastic strain rate of the arch dam. Numerical calculations and analyses reveal that considering the strain rate is important in the safety assessments of arch dams located in seismically active areas.

关键词： concrete strain rate constitutive model consistency-viscoplastic William-Warnke three-parameter model algorithm arch dams seismic responsesimulation

INFLUENCE OF MIXING DEVICE ON SERUM-FREE CULTIVATION OF INSECT CELLS IN SPINNER FLASKS

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化工学报 2000年第S1期51卷 101-104页

作者： Zhao Jiao, Dai Hu and Tan Wensong (State Key Lab of Bioreactor Engineering, East china university of science and technology Shanghai 200237,china)

A culture system was developed and successfully employed for the serum-free cultivation of Tn-5B1-4 (Tn5 ) insect cells. With our adaptation procedure, it was possible to obtain cells fully adapted to serum-free media in stationary T-flasks and then enable these adapted cells to grow well in spinner flasks immediately. The spinner "ask with special stirring design proved tO provide favorable culture environment that made it desirable for use in the serum-free cultivation of Tn5 cells even at low seeding density.

关键词： serum-free insect cells adaptation spinner flasks culture environment

Large-scale Rock Landslide Slip Surface Location Analysis and Strength Parameters Evaluation

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Journal of Mountain science 2011年第2期8卷 261-269页

作者： YOU Min NIE Dexin Civil Engineering School Anhui University of Architecture Hefei 230601 China Chengdu university of technology State Key Lab of Geo-hazards Prevention Chengdu 610059 China

Large-scale rock landslides have huge impacts on various large-scale rock engineering and project operations. They are also important aspects evaluating geological disasters. In the initial evaluations on the stability of large-scale rock landslides, in most cases, it is difficult to conduct evaluation or to have accurate evaluations because most of large-scale rock landslides are huge in size, high in slopes, and located in the canyon of mountains, which makes the exploration very difficult and thus hard to get credible data on slip surface form, location, depth and strength. This paper describes the Badi landslide happened along the Lancang River, and systematically introduces methods to analyze and verify large-scale slip surface form using terrain conditions surrounding the large-scale landslide, shape of the slide walls, and development patterns of streams and gully. This paper also introduces ways to obtain strength parameters of slip surface with the soil in the slide zone by using the principles of stress state, principles of gravity compaction, structure regeneration and strength regeneration. It is confirmed that analyzed results to the slip surface are basically consistent with the exploration results. The methods introduced here have been successfully applied to evaluate the stability of Badi large-scale rock landslide and have been applied in engineering practices.

关键词： Rock landslide Sliding face Gravity compaction

MULTI-LAYER TRACK FUSION ALGORITHM BASED ON SUPPORTING DEGREE MATRIX

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Journal of Electronics(china) 2012年第Z2期 229-236页

作者： Zhang Wei Quan Li Zhang Ke (Research institute of Electronic science and technology, university of Electronic science and technology of china, Chengdu 611731, china)

The random noises of multi-sensor and the environment make observations uncertain and correlative, so the performance of fusion algorithms is reduced by using observations directly. To solve this problem, a multi-layer track fusion algorithm based on supporting degree matrix is proposed. Combined with the track fusion algorithm based on filtering step by step, it uses multi-sensor observations to establish supporting degree matrix and realize multi-layer fusion. Simulation results show its estimation precision is higher than the original algorithm and is increased by 20% around. Therefore, it solves the problem of target tracking further in the distributed track fusion system.

关键词： Track fusion Filtering step by step Supporting degree matrix Target tracking

Several significant hydrographic characteristics and their formation mechanism in the South china Sea during the spring and summer of 1998

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Acta Oceanologica Sinica 2003年第4期22卷 491-502页

作者： Xu Jianping 1,2,Chai Fei 2,3,Liu Zenghong 1,2,Zhu Bokang 1,2 1.Second institute of Oceanography,State Oceanic Administration,Hangzhou 310012,china. 2.Key Laboratory of Ocean Dynamic Processes and Satellite Oceanography of State Oceanic Administration, Hangzhou 310012, china 3.School of Marine science, university of Maine, Orono, ME 04469-5741,USA Second institute of Oceanography State Oceanic Administration Hangzhou 310012 China Key Lab. of Ocean Dynamic Processes Hangzhou 310012 China School of Marine science University of Maine Orono ME 04469-5741 United States

dOn the basis of the CTD data obtained by the two cruises before and after summer monsoon burst (25th May, 1998), several significant hydrographic characteristics, their variation and formation mechanism in the South china Sea (SCS) are analyzed. The results show that the Kuroshio water intrudes into the SCS in the form of loop current, and its main part is limited to the east of 118degreesE near the Luzon Strait. Then it continuously extends westwards under the influence of the large-scale circulation, and has a distinct impact on the area north of 16degreesN. There are two high temperature and low salinity regions: west off Luzon and east off Vietnam respectively. One region west off Luzon strengthens obviously after summer monsoon burst, the other east off Vietnam shows a tendency of weakening in the north and strengthening in the south. The formation of these two high temperature and low salinity regions is related to the anti-cyclonic eddies existing in this area, besides, it is also related to the high temperature feature west of Luzon, the influx of Sulu Sea water and the influence of the large-scale air circulation. There is a cold region below the depth of 50 m in the south of Zhongsha Islands, and it strengthens after monsoon burst. The formation of cold water is related to the upwelling there.

关键词： monsoon burst hydrographic characteristics Kuroshio Luzon Strait South china Sea

Identification of a bi-directional promoter from Tomato yellow leaf curl china virus

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Progress in Natural science:Materials International 2006年第3期16卷 281-286页

作者： GUAN Cuiping and ZHOU Xueping (institute of Biotechnology, Zhejiang university, Hangzhou 310029, china) institute of Biotechnology Zhejiang University Hangzhou 310029 China

A bi-directional promoter of Tomato yellow leaf curl china virus (TYLCCNV) was obtained with the total DNA from TYLCCNV isolate Y10 infected tobacco leaves as a template. plant expression vectors were constructed by fusing the amplified DNA fragment with the gus gene and nopaline terminator in different orientations. The vectors containing promoter fragments were transferred into leaf cells and plant stems of Nicotiana benthamiana by Agrobacterium-mediated method. Transient expression results showed that both the complementary and virion-sense promoters could drive the gus gene to express, and the GUS activity of the complementary-sense promoter was stronger than that of the virion-sense. Co-expression of the vector containing βC1 gene of TYLCCNV DNAβ with the vector containing a bi-directional promoter revealed that the βC1 protein has no impact on expression of either the virion- or the complementary-sense promoter.

关键词： Tomato yellow leaf curl china virus bi-directional promoter transient expression geminivirus.

Controllable synthesis of Ni-catalyzed tetragonal tungsten nanowires via chemical vapor deposition

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Progress in Natural science:Materials International 2012年第5期22卷 514-519页

作者： Chao Wang a,Yuehui He a,Chaoqun Peng b,Shiliang Wang a,c,Xinli Liu a a State Key Laboratory of Powder Metallurgy,Central South university,Changsha 410083,china b School of Material science and Engineering,Central South university,Changsha 410083,china c School of Physics science and technology,Central South university,Changsha 410083,china State Key Laboratory of Powder Metallurgy Central South University Changsha 410083 China School of Material science and Engineering Central South University Changsha 410083 China School of Physics science and technology Central South University Changsha 410083 China

Tetragonal single-crystal tungsten nanowires were successfully synthesized by chemical vapor deposition(CVD) catalyzed by Ni *** influences of the catalysts,temperature and growth time on the formation of the nanowires were *** was found that the tetragonal tungsten nanowires(WNWs) arrays were obtained by deterministic growth from the ordered Ni catalyst particles with one-to-one relation in size and position between the catalysts and *** large-scale tungsten nanowire arrays were synthesized at the low temperature of 950℃.Samples were characterized by X-ray diffraction(XRD),field-emission scanning electron microscopy(FE-SEM),transmission electron microscopy(TEM) and high-resolution transmission electron microscopy(HRTEM).Increasing growth time at 950℃,the tip of the WNWs changed from four(211) planes to four(110) *** controls of the orientation and structure of WNWs arrays were important for adjusting their properties to satisfy different requirements of potential nanodevices.

关键词： Tungsten nanowires Ni catalysts Chemical vapor deposition Nanostructures

Novel research on main-lobe jamming polarization suppression technology

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science china(Information sciences) 2012年第2期55卷 368-376页

作者： DAI HuanYao,WANG XueSong,LIU Yong,LI YongZhen & XIAO ShunPing College of Electronic science and Engineering,National university of Defense technology,Changsha 410073,china College of Electronic science and Engineering National University of Defense Technology Changsha China

A novel main-lobe blanketing interference suppression method which named as spatial virtual multiple channel concurrent polarization filter technology is *** processes sample data using the slow varied polarization property of a scanning *** orthogonal polarized signal and polarization states of the receiving signal can be *** optimal polarization is then calculated for use in polarization filtering to achieve the objective of suppressing noise *** effect of elevation measurement error on interference suppression performance is eliminated by concurrent *** and simulation results show that,this technology enabled self-polarization information processing for single polarized radar which improved its working performance.

关键词： antenna polarization polarization decomposition virtual polarization filter multi-channel concurrent interference suppression

纳米稀土对复合材料中超细粒子团聚现象的抑制(Ⅰ)——超细金属铜粉团聚现象及其团聚成因

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中国稀土学报 2003年第Z1期21卷 67-70页

作者：豆立新龚烈航沈健吕振坚何晓晖龚天平南京大学表面和界面化学工程技术研究中心江苏南京210093 解放军理工大学工程兵工程学院江苏南京210007

应用纳米粒子进行复合材料的改性,其关键和核心技术之一是要解决纳米粒子的在复合材料体系中的团聚问题。通过对超细的金属铜粉改性聚四氟乙烯中金属粒子的团聚性现象的分析和认识,揭示了超细粒子团聚性的共性和工艺中的特殊性;同时研... 详细信息

应用纳米粒子进行复合材料的改性,其关键和核心技术之一是要解决纳米粒子的在复合材料体系中的团聚问题。通过对超细的金属铜粉改性聚四氟乙烯中金属粒子的团聚性现象的分析和认识,揭示了超细粒子团聚性的共性和工艺中的特殊性;同时研究表明,仅通过偶联剂对超细粉体粒子表面进行处理的修饰方法解决纳米粒子的团聚性,其作用是有限的。

关键词：纳米复合材料纳米粒子超细粒子表面修饰团聚分散稀土