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Multi Model technology and Its Application in the Integration of CAD/CAM/CAE

厦门大学学报（自然科学版） 2002年第S1期41卷 215-216页

作者： XU Xiang-yang, WANG Yan-yan (Automotive engineering college, Harbin institute of technology Weiha i, Shandong 264209, china)

The globalization and the intensive competition of th e automotive market require shortening the product development cycle, improving the quality and reducing the cost. Optimizing the product development process, b uilding product’s consistent defining model for life cycle, and realizing the in tegration of CAD/CAM/CAE and Concurrent engineering (CE) become the means to acc ept the challenge. A new product modeling technology, Multi Model technology (MM T), is provided in this paper to meet the needs of the challenge for automotive powertrain product development. First, the paper introduces the concept of Multi Model technology. MMT introduce s Object-oriented technology (OT) into product modeling process and combine OT with feature-based modeling technology. With the help of OT, MMT builds product object model to support system level management in product development. The obj ect model of the product is a Multi Model Structure. The MMS consists of finish part model level (assembly model level), rough part model level (part model leve l), function model level and basic model level. Every models in the MMS is creat ed by feature-based technology in design process. In this case, models in the M MS of product can be shared by casting mould, sand core and sand core mould. The refore, CAD engineers, CAE engineers and CAM engineers can work concurrently and the integration of CAD/CAM/CAE can be realized. Second, MMT is applied in cylinder head development. The multi model structures of cylinder head, its casting mould, sand core and sand core mould are built, an d the process-oriented feature models of every objects in the multi model struc tures are modeled, the application of different model objects in development pro cess is analyzed. The integrated modeling technology of cylinder head, its casti ng mould, sand core and sand core mould under MMT is studied. And the concurrent engineering oriented integration method of CAD/CAE and the method to realize th e integration

关键词： modeling technology CAD/CAM/CAE integration cy linder head

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Origin of C type adakite magmas in the NE Xing＇an block, NE china and tectonic implication

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Acta Geochimica 2018年第2期37卷 281-294页

作者： changzhou Deng Guangyi Sun Deyou Sun Hu Huang Jianfeng Zhang Jun Gou college of Earth Sciences Jilin University Changchun 130061 China State Key Laboratory of Environmental Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China University of Chinese Academy of Sciences Beijing 100049China institute of Sedimentary Geology Chengdu University of Technology Chengdu 610059 China Heilongjiang institute of Geological Survey Harbin 150036China

In this paper, we report new whole-rock geochemical and zircon U-Pb data for monzogranites in the NE Xing＇an block. These data constrained the petrogenesis of C type （high Sr/Y） adakitic rocks and showed the spatial extent of the influence of the Mongol-Okhostsk ocean tectonic regime and the collision between the Jiamusi Massif and Songliao Terrane. New zircon laser-ablation inductivity coupled plasma mass spectrometry （LA-ICP-MS） U-Pb data indicated that the monzogranites in the studied area were emplaced in the Early Jurassic （～ 180 Ma）. These rocks were characterized by unusally high SiO2 （≥67.49）, and Sr （461-759 ppm）, but strikingly low Y （4.63-8.06 ppm） and HREE （∑HREE = 3.83-6.49 ppm, Yb = 0.5-0.77 ppm） contents, with therefore high Sr/Y （67.2-119） and （La/Yb）N （29.7-41.5） ratios, showing the geochemical characteristics of C type adakitic granite. The data displayed negligible Eu anomalies （Eu/Eu^＊ =0.77-1.08）, LREE-enriched and pronounced negative Nb and Ta anomalies. The C-type adakites in the studied area were most likely derived from the partial melting of a thickened lower continental curst. The magma source is most likely dominated by amphibolites and garnet amphibolites. In combination with previously-reported data from igneous rocks from the Mesozoic in NE china, we conclude that the Xing＇ an block was influenced by the Mongol-Okhotsk subduction tectonic system, and experiences compressive settings from the amalgamation of the Jiamusi block in the east of the CAOB.

关键词： C type adakite Geochemistry U-Pb age Thickened LCC NE Xing' an block

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Development of novel and sensitive sensors based on microcantilever of atomic force microscope

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Progress in Natural Science:Materials International 2006年第5期16卷 445-451页

作者： JIN Yan, WANG Kemin and JIN Rong (State Key Laboratory of Chemo/Biosensing and Chernometrics, institute of Biological technology, college of Chemistry and Chemical engineering, Hunan University, Changsha 410082, china) [a]State Key Laboratory of Chemo Biosensing and Chemometrics Institute of Biological Technology College of Chemistry and Chemical Engineering Human University Changsha China

Recently, the development of sensors based on microfabricated cantilevers of atomic force microscope (AFM) has attracted considerable attention from the designers of novel physical, chemical, and biological sensors. Many kinds of sensors have been developed taking the advantages of its high-resolution imaging, force measurement and force sensitivity, such as immunosensor and DNA biosensor and the sensors for detection of intermolecular interaction. This paper reviews the progress made in this field and discusses the signal transfer principles by which the design of the sensors is achieved.

关键词： atomic force microscopy microcantilever sensor.

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Preparation and properties of ultra-fine TiCN matrix cermets by vacuum microwave sintering

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Rare Metals 2010年第5期29卷 528-532页

作者： ZHANG Hou'an YAN Dike TANG Siwen institute of Material Preparation and Applied technology Xiamen University of Technology Xiamen 361024 China college of Electromechanical engineering Hunan University of Science and Technology Xiangtan 411201 China

Ultra-fine titanium carbonitride （TiCN） matrix materials with a grain size less than 1μm were successfully prepared by vacuum microwave sintering. The milling process for raw TiCN particles and the microstructure and properties of cermets produced with a composition of 15wt.%WC-17wt.%（Co＋Ni）-9wt.%Mo2C-59wt.%***0.3 and sintered by vacuum microwave were analyzed by scanning electron microscopy （SEM） and X-ray diffraction （XRD）. The results show that a ball-to-powder mass ratio of 8：1 and a milling time of 50 h provided appropriate conditions for the production of ultra-fine TiCN solid solution powders. The use of vacuum microwave sintering produced cermets with much finer grain and black core structures and higher relative density and hardness than those produced by vacuum sintering technology.

关键词： cutting tools titanium carbonitride grain size microwave sintering milling hardness

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Torque model of hydro turbine with inner energy loss characteristics

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Science china(Technological Sciences) 2010年第10期53卷 2826-2832页

作者： ZENG Yun1,2, GUO YaKun2, ZHANG LiXiang1, XU TianMao3 & DONG HongKui4 1 Construction engineering college, Kunming University of Science and technology, Kunming 650051, china 2 School of engineering, University of Aberdeen, Aberdeen AB24 3UE, UK 3 Computing Center, Kunming University of Science and technology, Kunming 650051, china 4 Hydraulic Energy Department, Yunnan Electric Power Test and Research institute, Kunming 650217, china 1. Construction engineering college Kunming University of Science and Technology Kunming 650051 China2. School of Engineering University of Aberdeen Aberdeen AB24 3UE UK3. Computing Center Kunming University of Science and Technology Kunming 650051 China4. Hydraulic Energy Department Yunnan Electric Power Test and Research Institute Kunming 650217 China

This paper presents the result and analysis of the composition of energy loss occurring in the hydro turbine. Two new types of energy losses,namely the hydraulic loss in the flow channel and the impact loss,are defined. All losses within the hydro turbine are divided into four types and the loss coefficients are defined accordingly. Expressions or characteristic descriptions of these losses as well as the calibration method of the loss coefficients are presented. Furthermore,the torque model of the hydro turbine where the inner energy loss takes place is established. The developed model has been used to calculate the power loss due to the mechanical friction generated by the units’ rotation to solve the difficulty of measurements of the mechanical friction loss in the hydro turbine. The definition of the impact loss explains the phenomenon that the loss of no-load is greater than that of the rated operation. A set of conversion coefficients are defined using the characteristic parameters at the rated operation,which are used to transform the parameters in the torque model into those that are easily measured. Therefore,the expression of the hydro turbine power is converted into a function that has the main servomotor displacement as its single variable. This makes the proposed model be convenient to use. Finally,the proposed model and methods are calibrated and verified using the measured data of a hydropower plant. Good agreement between the modeled results and the measurements indicates that the proposed model can represent the inner energy loss characteristics of the hydro turbine.

关键词： hydraulic loss in flow channel impact loss loss coefficients conversion coefficients

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Thermal Performance of Building Roof with Infrared Reflective Coatings

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湖南大学学报（自然科学版） 2009年第S1期36卷 151-155页

作者： SHEN Hui,TAN Hong-wei,KATSUO MIKI,LIU Xiao-yu(Research institute of HVAC and Gas engineering,college of Mechanical engineering,Tongji University,Shanghai 200092,china) Research institute of HVAC and Gas engineering College of Mechanical Engineering Tongji University Shanghai 200092 China

This paper investigated the applicability and effects of infrared reflective coating on energy consumption of factory building in hot summer and warm winter *** first resorted to theoretical calculation,which demonstrated the beneficial effects of infrared reflective coating on reducing building energy *** it analyzed a field measurement done on two identical rooms respectively with ordinary coated roof and infrared reflective coated roof from November 2006 to October 2007,on a 24h *** measured data include exterior and interior roof surface temperature,indoor air temperature,and indoor globe *** related weather data is from a weather station near the measured *** continuous measurement has been accomplished in southern china,and the measured data indicate that roof surface temperature and heat gain are significantly decreased in summer while slight negative effects in winter are induced by adopting infrared reflective *** it is simple and applicable to reduce building energy consumption in this area by applying infrared reflective *** equation between reduced roof thermal property,such as surface temperature and heat gain,and reduction in absorbed solar radiation shows their highly linear *** on the measured data,it is estimated that the reduced power consumption is 3.45 kWh/m2·month in June.

关键词： infrared reflective coating hot summer and warm winter zone measurement reflectivity

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Experimental Study of Effect of Vents in Thermal Ventilation

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湖南大学学报（自然科学版） 2009年第S1期36卷 30-34页

作者： LIU Dong,LIU Xiao-yu,ZHUANG Jiang-ting,SHEN Hui(Research institute of HVAC and Gas engineering,college of Mechanical engineering,Tongji University,Shanghai 200092,china) Research institute of HVAC and Gas engineering College of Mechanical Engineering Tongji University Shanghai 200092 China

The effects of vents on thermal ventilation to save energy in the cold rolling workshop of Baosteel were *** to the scale modeling theory,a small chamber was *** details about construction of experiment on thermal ventilation and the preparation and arrangement of apparatus were discussed,and then the effects of vents on thermal ventilation were studied through experiments,which includes the temperature distribution,the volume of ventilation,the temperature difference between inlets and outlets,the neutral plane,and the effective thermal coefficient of thermal natural *** on this,the effects of natural ventilation based on varied area of inlets and outlets and those of vents on one side and on different sides were *** to the experiments,the area of inlet vents and outlet vents affect the temperature distribution in chamber,and their effects on ventilation volume are different,but the effects of vents in single side or different sides are the same under the condition that only thermal ventilation is considered.

关键词： vents natural ventilation experiment on thermal ventilation

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Comprehensive benefit of flood resources utilization through dynamic successive fuzzy evaluation model: A case study

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中国科学：技术科学英文版 2010年第2期53卷 529-538页

作者： FENG Feng1,2, XU ShiGuo1, LIU JianWei1, LIU Dan1,3 & WU Bo4 1 institute of Water Environment, School of Civil and Hydraulic engineering, Dalian University of technology, Dalian 116024, china 2 Yellow River Conservancy Technical institute, Kaifeng 475003, china 3 college of Water Resources, Shenyang Agricultural University, Shenyang 110161, china 4 Office of Flood Control and Draught Relief in Jilin Province, Changchun 130033, china 1. institute of Water Environment School of Civil and Hydraulic Engineering Dalian University of Technology Dalian 116024 China2. Yellow River Conservancy Technical Institute Kaifeng 475003 China3. College of Water Resources Shenyang Agricultural University Shenyang 110161 China4. Office of Flood Control and Draught Relief in Jilin Province Changchun 130033 China

Taking the flood resources utilization in Baicheng, Jilin during 2002–2007 as the research background, and based on the entropy weight and multi-level & multi-objective fuzzy optimization theory, this research established a multi-level & semi-constructive index system and dynamic successive evaluation model for comprehensive benefit evaluation of regional flood resources utilization. With the year 2002 as the base year, the analyzing results showed that there existed a close positive correlation between flood utilization volume and its benefits, comprehensive evaluation value and its comparison increment. Within the six successive evaluation years, the comprehensive benefit of 2003 was the best, in which the benefit evaluation increment reached 82.8% whereas the year of 2004 was the worst, in which the increment was only 18.2%. Thus the sustainability and correctness of the evaluation were verified by six years successive evaluation and increment comparison. The analyzing results showed that the economic benefits, ecological benefits and social benefits of flood utilization were remarkable, and that the comprehensive benefit could be improved by increasing flood utilization capacity, which would promote the regional sustainable development as well. The established dynamic successive evaluation provides a stable theoretical basis and technical support for further flood utilization.

关键词： flood resources utilization comprehensive benefit dynamic successive fuzzy evaluation Baicheng City

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PREPARATION AND PROPERTIES OF Ni-Cr AND Fe-Cr-Al FILMS BY VACUUM EVAPORATION

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Acta Metallurgica Sinica(English Letters) 2003年第4期16卷 283-288页

作者： X.W. Shi, Z.Y. Liu, B.C. Zeng and CM. Liinstitute of Materials Science & technology, college of Mechanical engineering, South china University of technology, Guangzhou 510640, china institute of Materials Science & technology College of Mechanical Engineering South China University of Technology Guangzhou 510640 China

Ni-Cr and Fe-Cr-Al films deposited on the Al2O3 substrate are studied by a method of vacuum evaporation in this paper. Influence of resistance value on density and evaporation parameters of the films reveals that the resistance of films and the adhesion of films to substrates are determined by the evaporation time and the substrate temperate under the condition of the maximum vacuity of 6.2×10-4 Pa, respectively.

关键词： vacuum evaporation resistance of film vacuity

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Risk analysis model for landslide mass of high slope in dam area

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Science china(Technological Sciences) 2008年第S2期51卷 25-31页

作者： GU ChongShi1,2,HE XianFeng3,4,WU ZhongRu1,2 & SU HuaiZhi1,2 1 college of Water Conservancy and Hydropower engineering,Hohai University,Nanjing 210098,china 2 National engineering Research Center of Water Resources Efficient Utilization and engineering Safety,Nanjing 210098,china 3 Yellow River institute of Hydraulic Research,Zhengzhou 450003,china 4 Embankment Security Defect Prevention and Control engineering Research Center of MWR,Zhengzhou 450003,china 1. college of Water Conservancy and Hydropower engineering Hohai University Nanjing 210098 China 2. National engineering Research Center of Water Resources Efficient Utilization and engineering Safety Nanjing 210098 China 3. Yellow River institute of Hydraulic Research Zhengzhou 450003 China 4. Embankment Security Defect Prevention and Control engineering Research Center of MWR Zhengzhou 450003 China

In order to identify the threat of reservoir bank landslide to dam safety and reduce the risk of dam failure,impact factors of the landslide are *** concept of landslide risk degree is put forward to measure the threat of landslide to dam *** monotony of the landslide risk assessment function which changes with different affecting factors is analyzed *** on gene automatic programming,a data mining model of the landslide risk assessment function is constructed combined with impact factors of reservoir bank landslide on dam *** the assessment function of landslide risk has been excavated and established according to practical project information,which provides a valuable reference for analyzing the impact of landslide on dam risk.

关键词： landslide dam failure risk landslide risk

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