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Computer generated hologram null compensator for optical metrology of a freeform surface

OPTIK 2010年第24期121卷 2262-2265页

作者： Talha, M. M. Chang, Jun Wang, Yongtian Cheng, Dewen Zhang, Tingcheng Aslam, M. Khan, A. Naeem Beijing Inst Technol Coll Optoelect Beijing 100081 Peoples R China Univ Arizona Coll Opt Sci Tucson AZ 85721 USA Int Islamic Univ Fac Engn & Technol Dept Elect Engn Islamabad 44000 Pakistan IICS Islamabad Pakistan

A computer-generated hologram (CGH) null compensator has been designed for optical metrology of a freeform surface (FFS) with positive base radius. The CGH is being employed in the freeform testing for the first time. The basic concept of the optical metrology and the testing procedure are explained explicitly. The design results of the CGH null compensator are presented in this article. Moreover, the design method and its results are discussed in detail. (C) 2010 Elsevier GmbH. All rights reserved.

关键词： Freeform surface CGH Optimization Testing method Optical metrology

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Reliability Analysis of Shiplift Gear Based on System-level Load-Strength Interference Model

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2nd International Conference on Advances in Product development and Reliability (PDR)

作者： Wu, Ying Xie, Li-Yang Wang, De-Cheng Gao, Ji-Zhang Northeastern Univ Sch Mech Engn & Automat Shenyang 110819 Peoples R China China Acad Machinery Sci & Technol Beijing 100083 Peoples R China China Inst Water Res & Hydropower Res Beijing 100038 Peoples R China

ISBN: (纸本)9780878492541

A reliability analysis method for the shiplift gear according to the system-level load-strength interference model is presented. The gear is regarded as a series system with dependent failure and multiple failure models. Its reliability is obtained by calculating the probability that the minimum order statistic of the strengths exceeds the maximum order statistic of repeated random loads. The load probability distribution of gear is then obtained using Monte Carlo on the basis of load information. The contact strength and bending strength are calculated. On the basis of system-level load-strength interference analysis, system reliability of a gear is straightforward built up. Finally, system reliability of a gear is worked out, which shows a high reliability.

关键词： Gear reliability Monte Carlo simulation Load-strength interference model Order statistics

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Enrichment of chlorobenzene and o-nitrochlorobenzene on biomimetic adsorbent prepared by poly-3-hydroxybutyrate (PHB)

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JOURNAL OF HAZARDOUS MATERIALS 2010年第1-3期177卷 508-515页

作者： Zhang, Xiaoxuan Wei, Chaohai He, Qincong Ren, Yuan S China Univ Technol Coll Environm Sci & Engn Guangzhou 510006 Guangdong Peoples R China S China Univ Technol Coll Chem & Chem Engn Guangzhou 510640 Peoples R China

Poly-3-hydroxybutyrate (PHB) was used as a new material to prepare a biomimetic adsorbent by a modified double emulsion solvent evaporation technique. The enrichment capacities of the adsorbent for the toxic liposoluble organic compounds were evaluated by chlorobenzene (CB) and o-nitrochlorobenzene (o-NCB) with the adsorption isotherms, enrichment factor (EF) and enrichment kinetics. The results showed that Sips isotherm fitted the experimental data better than Langmuir and Freundlich models, as well as the pseudo-second order kinetic model fitted better than the first order model. For CB and o-NCB, the maximum adsorption capacity was 125.99 and 39.56 mg g(-1), while the maximum EF was 1204 and 1149 at 20 degrees C for 36 h, though the specific surface area (BET) of the adsorbent was only 8.45 m(2) g(-1). CB had a higher EF than o-NCB because the hydrophilic group (-NO2) decreases the liposoluble ability of o-NCB. K-ow has a positive correlation with EF, so the organochlorine compounds are liable to be adsorbed by the adsorbent. The results indicated that PHB, even polyhydroxyalkanoates, can be a new biodegradable adsorption material. (C) 2009 Elsevier B.V. All rights reserved.

关键词： Enrichment Biomimetic adsorbent Poly-3-hydroxybutyrate (PHB) Chlorobenzene o-Nitrochlorobenzene

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Fast and dynamic generation of linear octrees for geological bodies under hardware acceleration

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Science china Earth Sciences 2010年第1期53卷 113-119页

作者： DENG Hao ZHANG LiQiang MAO XianCheng MA JingTao KANG ZhiZhong PENG JunHuan RUI XiaoPing LIU Liu State Key Laboratory of Remote Sensing Science Beijing Normal UniversityBeijing 100875China School of Geoscience and Environmental Engineering Central South UniversityChangsha 410083China PTV America Inc.1145 Broadway Plaza Ste 605TacomaWA 98407USA Department of Geodesy and Geomatics School of Land Science and TechnologyChina University of GeosciencesBeijing 100083China College of Resources and Environment Graduate University of Chinese Academy of SciencesBeijing 100049China

In the application of 3D Geoscience Modeling,we often need to generate the volumetric representations of geological bodies from their surface *** octree,as an efficient and easily operated volumetric model,is widely used in 3D Geoscience *** paper proposes an algorithm for fast and dynamic generation of linear octrees of geological bodies from their surface models under hardware *** Z-buffers are used to determine the attributes of octants and voxels in a fast way,and a divide-and-conquer strategy is adopted.A stack structure is exploited to record the subdivision,which allows generating linear octrees *** algorithm avoids large-scale sorting process and bypasses the compression in linear octrees *** results indicate its high efficiency in generating linear octrees for large-scale geologic bodies.

关键词： 3D Geoscience Modeling octree geological body hardware acceleration

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Molecular analysis of the intestinal bacterial flora in cage-cultured adult small abalone, Haliotis diversicolor

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AQUACULTURE research 2010年第11期41卷 e760-e769页

作者： Huang, Zhao-Bin Guo, Feng Zhao, Jing Li, Wei-Dong Ke, Cai-Huan Xiamen Univ State Key Lab Marine Environm Sci Xiamen 361005 Fujian Province Peoples R China Xiamen Univ Coll Oceanog & Environm Sci Xiamen 361005 Fujian Province Peoples R China

To characterize the composition of the intestinal bacterial flora in cage-cultured adult small abalone, Haliotis diversicolor, we used both culture-dependent and culture-independent approaches. In addition, in order to investigate the presence of probable pathogens, the intestinal bacterial community structures of healthy and diseased adult abalones were compared using the denaturing gradient gel electrophoresis (DGGE) fingerprinting technique. Bacteria isolated from the healthy abalone intestine belonged to the genera Vibrio, Flammeovirga, Shewanella, Persicobacter and Paraferrimonas. From the 16S rRNA gene clone library analysis, the intestinal bacterial community comprised two groups: the Proteobacteria and Tenericutes. Betaproteobacteria (18.48%), Deltaproteobacteria (30.43%) and Mollicutes (35.87%) were the most dominant components in the clones and the Mollicutes were mainly Mycoplasma-affiliated clones. The DGGE band pattern demonstrated that more bands appeared in the healthy abalones (H group) than in the diseased abalones (D group). Although few potential pathogens were detected from the D group, a clustering dendrogram indicated that individuals of the H and D groups (except for D6) formed two separate clusters. An unidentified Deltaproteobacteria species and Mycoplasma sp. were the dominant components in the intestine of both the H and the D group.

关键词： 16S rRNA gene clone library DGGE intestinal bacterial flora small abalone

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Spectral efficient half-duplex relaying with interference suppression

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The Journal of china Universities of Posts and Telecommunications 2010年第6期17卷 19-24页

作者： LI Xing-zheng,LIU Yuan-an,XIE Gang,CHANG Ling-jun,HAN Xiao Key Laboratory of Universal Wireless Communications,Ministry of Education,Beijing University of Posts and Telecommunications,Beijing 100876,china [a] Key Laboratory of Universal Wireless Communications Ministry of Education Beijing University of Posts Telecommunications Beijing 100876 China

Two-hop relaying systems suffer spectral efficiency loss due to the half-duplex property of relays. This paper proposes an efficient relaying protocol which can recover the spectral efficiency loss but still work with half-duplex relays. However,there exists inter-relay interference which degrades the performance of the protocol. With this consideration,a power control policy is derived to suppress the interference using game theory,and then an algorithm is given to facilitate distributed implementation. Furthermore,impact of deploying more destination antennas on performance of the relaying protocol is investigated. Simulation results show that,with the power control policy,the proposed relaying protocol can achieve high spectral efficiency.

关键词： relaying protocol distributed power control cooperative communication decode-and-forward relay game theory

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Suitability of two seaweeds, Gracilaria lemaneiformis and Sargassum pallidum, as feed for the abalone Haliotis discus hannai Ino

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AQUACULTURE 2010年第1-4期300卷 189-193页

作者： Qi, Zhanhui Liu, Hongmei Li, Bin Mao, Yuze Jiang, Zengjie Zhang, Jihong Fang, Jianguang Chinese Acad Fisheries Sci Yellow Sea Fisheries Res Inst Qingdao 266071 Peoples R China Chinese Acad Fisheries Sci S China Sea Fisheries Res Inst Guangzhou 510300 Guangdong Peoples R China Chinese Acad Sci Yantai Inst Coastal Zone Res Yantai 264003 Peoples R China

The suitability of two algae species, Gracilaria lemaneiformis and Sargassum pallidum, for use as food sources for the abalone Haliotis discus hannai Ino was evaluated. Abalones were fed one of five experimental diets: 1) kelp Laminari japonica: 2) G. lemaneiformis: 3) S. pallidum;4) a mixed diet of L. japonica and G. lemaneiformis (1:1);and 5) a mixed diet of L. japonica and S. pallidum (1:1) for a period of 4 months. The survival, growth (shell length and body weight), condition index (body weight/shell length), and feed utilization were measured. Survival was excellent (100%) in all groups. Growth rate (body weight) was highest in the abalone fed kelp exclusively, followed by the mixed diet of kelp and G. lemaneiformis. The abalone fed S. pallidum had the lowest increase in body weight and the lowest feed intake. The mixed diet of kelp and G. lemaneiformis yielded the biggest increase in shell length. There were no significant differences in the condition index among all the treatment groups. The mean daily feed intake of L japonica was highest, followed by the mixed diets of kelp and G. lemaneiformis, and was lowest for S. pallidum. Abalone exhibited a preference for L japonica. The feed conversion efficiency was highest for G. lemaneiformis. Results suggest that G. lemaneiformis can be used as a partial substitute for kelp in the diet of cultured abalone. (C) 2010 Elsevier B.V. All rights reserved.

关键词： Abalone Haliotis discus hannai Ino Seaweeds Aquaculture Feed and nutrition

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A semantic geographical knowledge wiki system mashed up with Google Maps

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Science china(technological Sciences) 2010年第S1期53卷 52-60页

作者： GAO Yong,GAO Song,LI RunQiang & LIU YuInstitute of Remote Sensing and Geographical Information Systems,Peking University,Beijing 100871,china 1. Institute of Remote Sensing and Geographical Information Systems Peking University Beijing 100871 China

A wiki system is a typical Web 2.0 application that provides a bi-directional platform for users to collaborate and share much useful information ***,computers cannot well understand the wiki pages in plain *** user-generated geographical content via wiki systems cannot be manipulated properly and efficiently unless the geographical semantics is explicitly *** this paper,a geographical semantic wiki system,Geo-Wiki,is introduced to solve this ***-Wiki is a semantic geographical knowledge-sharing web system based on geographical ontologies so that computers can parse and storage the multi-source geographical ***,Geo-Wiki mashed up with map services enriches the representation and helps users to find spatial distribution patterns,and thus can serve geospatial decision-making by customizing the Google Maps APIs.

关键词： geo-ontology semantic wiki mashup Google Maps

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A novel four-way combining catalysts for simultaneous removal of exhaust pollutants from diesel engine

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Journal of Environmental Sciences 2010年第7期22卷 1104-1109页

作者： Jian Liu,Jie Xu,Zhen Zhao,Aijun Duan,Guiyuan Jiang,Yanni Jing State Key Laboratory of Heavy Oil Processing,china University of Petroleum,Beijing 102249,china. [a] State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249 China

A novel four-way combining catalysts containing double layers was applied to simultaneously remove four kinds of exhaust pollutants （NOx, CO, HC and PM） emitted from diesel engine. The four-way catalysts were characterized using scanning electron microscope （SEM） and Ultraviolet visible diffuse reflectance spectroscopy （UV-Vis DRS）. Their catalytic performances were evaluated by temperature-programmed reaction technology. The double layer catalysts could effectively remove the four main pollutants. The highest catalytic activity was given by the two-layered catalysts of La0.6 K0.4CoO3/Al2O3 and W/HZSM-5. Under the simulated exhaust gases conditions, the peak temperature of the soot combustion was 421℃, the maximal conversion of NO to N2 was 74%, the temperature of the HC total conversion was 357℃, and the maximum conversion ratio of CO was 99%.

关键词： four-way combining catalyst diesel engine exhaust double layers perovskite oxides zeolite catalysts

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基于子结构的递归分割树方法预测化合物皮肤致敏性(英文)

基于子结构的递归分割树方法预测化合物皮肤致敏性(英文)

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第十一届全国计算（机）化学学术会议

作者：芦静郑明月王雍沈倩诚罗小民蒋华良陈凯先中国科学院上海药物研究所新药研究国家重点实验室药物发现与设计中心

＜正＞Skin sensitization is an important toxic endpoint to be taken into account in the risk assessment of *** this paper,SAR（structure-activity relationships） analysis was performed on the skin sensitization potential of 320 compounds with local lymph node assay（LLNA） *** fragments were extracted by GASTON（GrAph/Sequence/Tree extractiON） based on ’quickstart principle’ from the training set.8 fragments of which the accuracy Q is significantly higher than 0.73（p＜0.1） were retained to make up an indicator descriptor *** fragment descriptor and 8 other physicochemical descriptors closely related to the endpoint,were calculated to construct the recursive partitioning tree（RP tree） for *** balanced accuracy of the training set and test set in the leave-one-out model were 0.846 and 0.800,*** results highlight that fragment-based RP tree is a preferable method for identifying skin ***,the selected fragments provide useful structural information for exploring sensitization mechanisms, and RP tree creates a graphic tree to identify the most important properties of skin sensitization. They can provide some instruction for designing of drugs with lower sensitizability.

关键词： Skin sensitization LLNA SAR Fragment Recursive partitioning tree Substructure mining algorithm

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