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汽车工程 2012年第10期34卷 909-912页

作者：姚春德赵新峰沈恩华汤绪雯张华天津大学内燃机燃烧学国家重点实验室天津300072 奇瑞汽车股份有限公司发动机工程研究院芜湖241006

为研究甲醇汽油对汽车橡胶零部件的腐蚀和力学性能的影响,通过对几种现有车辆正在使用的橡胶元件进行甲醇汽油浸泡试验,观察橡胶元件形变随作用力的变化关系,并深入分析橡胶元件经过浸泡后变化的原因。结果表明,浸泡橡胶管的溶液析出的... 详细信息

为研究甲醇汽油对汽车橡胶零部件的腐蚀和力学性能的影响,通过对几种现有车辆正在使用的橡胶元件进行甲醇汽油浸泡试验,观察橡胶元件形变随作用力的变化关系,并深入分析橡胶元件经过浸泡后变化的原因。结果表明,浸泡橡胶管的溶液析出的黑色沉淀物包含有增强剂碳黑。由丁腈橡胶(NBR)+氯丁橡胶(CR)材料组成的橡胶管,和由三元氟橡胶(FKM)+编织层+氯醇橡胶(ECO)组成的橡胶管,受甲醇汽油中甲醇浓度影响较大,力学性能显著下降;多层PA12受掺入甲醇的影响较大,但对其掺入甲醇比例变化不敏感;甲醇汽油对气门油封无明显影响。

关键词：甲醇汽油橡胶元件力学分析

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基于近自然林理论的生态景观林带建设探讨——以广州市科韵路为例

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中国城市林业 2014年第2期12卷 10-13页

作者：李许文唐小清叶自慧张荣京陈红锋中国科学院华南植物园广州510650 中国科学院大学北京1000493 广州普邦园林股份有限公司广州5106004 华南农业大学生命科学学院广州510642

文章以人工林近自然化改造理论为指导,通过实地调查科韵路绿化现状,分析其植物种类、群落结构与林相观赏特性,在此基础上提出了近自然模式的优化策略。研究结果可为广东省生态景观林带建设提供参考与借鉴。

关键词：生态景观林带绿化现状近自然改造广州

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Determination of hyperin in seed of Cuscuta chinensis Lam. by enhanced chemiluminescence of CdTe quantum dots on calcein/K₃Fe(CN)₆ system

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FOOD CHEMISTRY 2012年第4期134卷 2383-2388页

作者： Kang, Jing Li, xuwen Geng, Jiayang Han, Lu tang, Jieli Jin, Yongri Zhang, Yihua Jilin Univ Coll Chem Dept Analyt Chem Changchun 130012 Peoples R China

In this paper, 3-mercaptocarboxylic acid (MPA) modified CdTe quantum dots (QDs) were used as sensitizers, to enhance the chemiluminescence (CL) of the calcein/K3Fe(CN)(6) system. A new CL system of CdTe/calcein/K3Fe(CN)(6) was developed. The effects of reactant concentrations and the particle sizes of CdTe QDs on the CL emission were investigated in detail. The possible enhancement mechanism of the CL was also further investigated based on the photoluminescence (PL) and CL spectra. Polyphenols such as chlorogenic acid, quercetin, hyperin, catechin and kaempferol, were observed to inhibit the CL signal of the CdTe/calcein/K3Fe(CN)(6) system and determined by the proposed method. The proposed method was applied to the determination of hyperin in seed of Cuscuta chinensis Lam, and the results obtained were satisfactory. (C) 2012 Elsevier Ltd. All rights reserved.

关键词： Chemiluminescence CdTe quantum dots Polyphenols Seed of Cuscuta chinensis Lam.

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The Research and Realization of the Product Design and Process decision System Based on the Semantic Technology

The Research and Realization of the Product Design and Proce...

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1st International Conference on Mechanical Engineering

作者： Zhou, Honggen tang, Wencheng Jing, xuwen Zhang, Xiaojun Southeast Univ Sch Mech Engn Nanjing 211189 Jiangsu Peoples R China Jiangsu Univ Sci & Technol Sch Mech Engn Zhenjiang 212003 Peoples R China

ISBN: (纸本)9783037850770

After several decades of research, the traditional modeling methods, such as geometric model, feature model and integrated product model, can't fully meet the integrated product information and the related knowledge that required. Meanwhile, lack of semantics, is not conducive to the using and sharing of knowledge. Semantic-based product design and process decision can shorten the product development cycle, reduce costs and allow the computer to participate in the design. Based on building of complex electronic products ontology and already been built OWL ontology file introduced into database, this paper combines Ontology model of complex electronic products with the semantic Web, studies a network design model based on the semantic Web and develops a product design and process decision Web platform based on semantic. The platform can realize product design, semantic search of the resources and decision of parts machining process, thus, to improve the productivity and enhance the efficiency and competitiveness of the company by the system.

关键词： Ontology Semantic web Semantic retrieval Process decision Manufacturing resources

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Research and Application of Intelligent CAD Technology in R and D and Management of the Electric Equipment

Research and Application of Intelligent CAD Technology in R ...

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2nd International Conference on Manufacturing Science and Engineering

作者： Zhou, Honggen tang, Wencheng Jing, xuwen Han, Shuai Southeast Univ Nanjing 211189 Jiangsu Peoples R China Jiangsu Univ Sci & Technol Zhenjiang 212000 Jiangsu Peoples R China

ISBN: (纸本)9783037850398

The paper chooses SolidWorks as the developing platform and Electric Equipment as object, researches into the principle of redevelopment by parameter-driving based on 3D feature modeling system of SolidWorks is introduced. Intelligent-CAD system is developed oriented to Electric Equipment by the parametrization structural design actuation technology, the manufacture characteristic automatic diagnosis and the extraction technology, the manufacture characteristic and the design resources, the design knowledge intelligence matching technique and so on. Through applies this system, we should develop the parametrization model of vise crucial element quickly, should extraction and memory components characteristic information and completion of the design features and design resources, design knowledge matching, and so on. The system should achieve to quickly finish product design, to shorten the development cycle and reduce product development costs.

关键词： Electric Equipment Intelligent-CAD Feature Recognition

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Research on the radar product collaborative development platform based on ontology theory

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Journal of Information and Computational Science 2010年第1期7卷 25-31页

作者： Zhou, Honggen tang, Wencheng Xing, Yan Jing, xuwen Han, Shui School of Mechanical Engineering Southeast University Nanjing 211189 China School of Mechanical Engineering Jiangsu University of Science and Technology Zhenjiang 212003 China

This paper presents an OWL ontology model of the multi-disciplinary collaborative development (RDMCD) system of the radar product including an ontology-based resource-sharing mechanism. Furthermore, the ontology-based framework of the product collaborative development system is described. Meanwhile, in the RDMCD ontology model this paper proposes a unified expression of product data on semantic level in order to solve the problems of the semantic ambiguity and the expression difficulty of the heterogeneous data. By applying the ontology map technology on the product resource-sharing mechanism, this model enables users to retrieve the required information in line from mass data in a more efficient way. In order to achieve the coordination and semantization in development procedure, a collaborative product development system was built based on the proposed technique, which proved that the RDMCD ontology model and its resource-sharing mechanism are effective in solving the information communication and date sharing issues in radar product development. Copyright © 2010 Binary Information Press.

关键词： Ontology

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南京北郊大气细粒子中黑碳气溶胶的观测研究

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环境科学学报 2011年第4期31卷 709-716页

作者：汤莉莉祝愿牛生杰朱彬陈敏东沈宏雷孙珍华李旭文张祥志南京信息工程大学环境科学与工程学院南京210044 南京信息工程大学大气物理学院南京210044 江苏省环境监测中心南京210029

运用2008年11月至2010年4月在南京北郊大气细粒子中黑碳气溶胶的观测结果,研究黑碳的时间序列演变特征、污染状况、与气体的非均相关系等.结果表明,黑碳气溶胶的日均浓度为1114～19408ng·m-3,局地人为活动与气象条件的改变等因素... 详细信息

运用2008年11月至2010年4月在南京北郊大气细粒子中黑碳气溶胶的观测结果,研究黑碳的时间序列演变特征、污染状况、与气体的非均相关系等.结果表明,黑碳气溶胶的日均浓度为1114～19408ng·m-3,局地人为活动与气象条件的改变等因素导致黑碳气溶胶日变化呈双峰形;黑碳气溶胶小时平均浓度频数统计和对数正态分布拟合的结果表明,南京北郊大气细粒子中黑碳最大频数浓度为2920ng·m-3,高于我国大部分地区.由2009年10月SO2、NO2、HNO2、O3的DOAS观测结果,研究其与黑碳气溶胶的关系,SO2、NO2和HNO2与黑碳气溶胶呈正相关,而O3与黑碳气溶胶呈明显负相关,相关系数分别为0.290、0.615、0.676和0.455.

关键词：黑碳大气细粒子观测南京北郊

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Block adjustment from multi-sensor imagery

Block adjustment from multi-sensor imagery

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12th Conference of the International-Association-for-Mathematical-Geology

作者： Zhang, Guo Qin, xuwen tang, Xinmin Wuhan Univ LIESMARS 129 Luoyu Rd Wuhan 430079 Hubei Peoples R China China Univ Geosci Beijing 100083 Peoples R China China Geol Survey Beijing 100011 Peoples R China Chinese Acad Surveying & Mapping State Bur Surveying & Mapping Key Lab Geoinformat Beijing 100039 Peoples R China

ISBN: (纸本)9780973422030

Block adjustment process, based on a multisensor block adjustment, is applied to VIR and SAR images: SPOT-5 HRG and RADARSAT SGF. The affine transformation in the image plane and the RPC (Rational Polynomial Coefficients or Rapid Positioning Capability) model and algorithms were used for the processing. Preliminary results of block formed with all images gave positional errors of around 20-26 m, these errors also include the 1:50,000 map errors (25-30 m).

关键词： Errors

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Growth responses of Picea mongolica seedlings to defoliation rate

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Journal of Environmental Sciences 2005年第2期17卷 232-236页

作者： ZOUChun-jing HANShi-jie QIShu-yan xuwen-duo LIDao-tang CollegeofLifeScience＆Biotechnology ShanghaiJiaotongUniversityShanghai200030China／／InstituteofAppliedEcologyChineseAcademyofSciencesShenyang110016China InstituteofAppliedEcology ChineseAcademyofSciencesShenyang110016China NormalCollege ShenyangUniversityShenyang110016China CollegeofLifeScience＆Biotechnology ShanghaiJiaotongUniversityShanghai200030China

Picea mongolica W. D. Xu. is an endemic species in China. The spruce forest is only found in semi-arid habitat in Inner Mongolia Autonomous Region of China. Based on the simulative defoliation experiment, it was proved that Picea mongolica seedlings had the compensatory and overcompensatory effects under the certain defoliation rate. The results of variance analysis on growth indexes showed that in PM Ⅰ(natural regeneration seedlings under Picea mongolica forest), the differences of H 1(height in June 23) and H 2(height in September 3) were extremely significant, and the difference of D(diameter at the breast height) were not significant. In PM Ⅱ(artificial regeneration seedlings under Betula platyphylla Suk. forest), the difference of H 1 was significant, the difference of H 2 was not significant, and the difference of D was extremely significant. The regression equations were established and the compensatory and overcompensatory points were obtained. In PM Ⅰ, the compensatory points of H 1, H 2, and D were 0.7628, 0.7436, 0.5725, and the overcompensatory points were 0.6056, 0.5802 and 0.2909 respectively. In PM Ⅱ, the compensatory points of H 1, H 2, and D are 0.5012, 0.3421, 0.2488, and the overcompensatory points are 0.4137, 0.2633 and 0.0747 respectively. These results suggested that the induction of compensatory growth mechanisms in spruce seedlings required a threshold level of defoliation, and the insects in Picea mongolica forest could be controlled in a certain degree.

关键词： Picea mongolica W. D. Xu. compensate overcompensate growth defoliation rate

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Analysis of micromachined cantilevers in transverse shock

Pan Tao Ti Hsueh Pao/Chinese Journal of Semiconductors

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Pan Tao Ti Hsueh Pao/Chinese Journal of Semiconductors 2005年第2期26卷 379-384页

作者： Fang, xuwen tang, Jieying Huang, Qing'an Lab. of MEMS Southeast Univ. Nanjing 210096 China

The response of the micromachined cantilever to the transverse shock is analyzed by taking it as a distributed-parameter system. The displacements and stresses of the cantilever are formulated with the mode superposition method. The possible failure modes are estimated by the maximum displacements and stresses, therefore the reliability designs of MEMS can be improved.

关键词： Cantilever beams

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