Volume 30,Issue 9,2007 Table of Contents

  • Display Type:
  • Text List
  • Abstract List
  • 1  Modeling and Simulation of a Novel Drive Train for Wind Turbine with Large Capacity
    HE Yu-lin LI Cheng-wu DU Jing LI Li-li LI Ming
    2007, 30(9):1-4. DOI: 10.11835/j.issn.1000-582X.2007.09.001
    [Abstract](759) [HTML](0) [PDF 336.58 K](1097)
    Abstract:
    On the basis of a planetary transmission, a novel hydrodynamic speed controlled transmission system for wind turbines with large capacity is presented. The new drive train consists of wind rotors, planet accelerators, hydro-mechanical and synchronous generators. The dynamic mathematical model of the drive train is established. The digital simulation of speed regulation characteristics for hydrodynamic speed controlled system is studied by using Matlab/Simulink. The simulation results show that continuously variable transmission and fixed speed control can be achieved, and the drive train works well in stability and dynamic performances. They can increase the power yield from the wind, smooth the electric power output, and alleviate the load peak in the new drive train .
    2  Analysis on Valve Train Noise of Engine
    LUO Hong XIA Tie-quan HU Jia-qiang WANG Pan
    2007, 30(9):5. DOI: 10.11835/j.issn.1000-582X.2007.09.002
    [Abstract](596) [HTML](0) [PDF 409.94 K](1078)
    Abstract:
    To research the mechanical and influence factors of noise of valve train of engine, noise-distinguishing test is taken with one certain 125 mL engine valve train. The result reveals that the valve train noise mainly results from impacting between rocker and valve stick, impacting of valve seating. With the way of model set up and simulating calculation of kinematics and dynamic of valve train, the influence factor of rocker impact force and valve seating acceleration of valve train is studied, which reveals that the acceleration of valve and impacting force between rocker and valve stick are mainly relied on cam buffer segment lift, cam buffer segment wrap angle and coefficient of accelerating segment of cam buffer segment. Choosing these parameters reasonably is helpful to decrease the acceleration of valve and impacting force between rocker and valve stick, and then reduce the noise of valve train.
    3  A Bayes Method of Reliability Synthesis Evaluation Based on the Small Sample-system
    JIN Biao QIN Da-tong HU Jian-jun
    2007, 30(9):9-13. DOI: 10.11835/j.issn.1000-582X.2007.09.003
    [Abstract](563) [HTML](0) [PDF 501.24 K](1122)
    Abstract:
    通过分析系统故障状态建立系统模糊不可靠度,在故障模式影响及危害性分析(Failure Mode Effect and Criticality Analysis,FMECA)的基础上,提出影响系统故障模式可靠性的一些重要参数,结合所建立的模糊不可靠度推导出系统不可靠度综合公式,利用提出的最优分布拟合方法、Bayes方法对系统可靠度进行Bayes点估计和置信下限估计.以某型发动机系统为例,对其不可靠度进行随机模拟仿真,仿真结果表明所提出的方法在实际的可靠性工程中具有一定的可行性.
    4  Data Processing of Motorcycles Coastdown Testing
    XU Zhong-ming JIN Jie ZHANG Zhi-fei MA Yong-zhang ZHOU Kun
    2007, 30(9):14-16. DOI: 10.11835/j.issn.1000-582X.2007.09.004
    [Abstract](706) [HTML](0) [PDF 303.90 K](269)
    Abstract:
    通过介绍摩托车滑行道路试验及数据处理方法,对比不同采样方法,以里程采样法对某125型摩托车进行滑行道路试验,并采用曲线拟合法对试验数据进行了分析,确定了摩托车滚动阻力系数和空气阻力系数,该方法经多次试验验证,可用于摩托车设计.
    5  Experiment Analysis on Noise of the Minibus Exhaust Muffler
    DENG Zhao-xiang LI Ming-you WANG Pan TAO Li-fang
    2007, 30(9):17-21. DOI: 10.11835/j.issn.1000-582X.2007.09.005
    [Abstract](662) [HTML](0) [PDF 493.31 K](210)
    Abstract:
    On the basis of analysis and research on an automobile exhaust noise, the theory and test combination method was adopted to improve the muffler, and then the acoustics performance of muffler was validated by doing some experiments with the engine. On different speeds of the engine, the inserting loss and spectrum characteristic under several muffler methods were studied. Finally the best muffler method was confirmed, and the purpose of reserving was achieved.
    6  The Development of Intelligent Fault Diagnosis System Based KBE Graph
    ZHANG Xiao-rong DAI Hong-jie SONG Chao-sheng
    2007, 30(9):22. DOI: 10.11835/j.issn.1000-582X.2007.09.006
    [Abstract](715) [HTML](0) [PDF 557.92 K](159)
    Abstract:
    Aimed at solving the insufficiency problem in the current intelligent fault diagnosis system, such as lack of development tools, inference oversimplification, and developed a kind of diagnosis system based on network and KBE graph. The system is simple and easy to establish, modify, expand and maintain and does not need further coding. In addition, it can significantly save time and reduce the chance of failure. The integration of expert rules, fuzzy logic and nerve network enables the system to adapt to those complicated systems which involve in multi-variable, multi-parameter, multi-object and multi-process. As an example, an on-line detection system for simulate-on rotor test bench has been established and typical faults were successfully diagnosed through it, which proved the validity and reliability of the system. Furthermore, the system has been declared national invention patent.
    7  The Study on Key Technology of Faults Detecting on Surface of Rail Steel Based on Machine Vision
    WANG Ling-yun HUANG Hong-hui WANG Xue IE Zhi-jiang
    2007, 30(9):27-32. DOI: 10.11835/j.issn.1000-582X.2007.09.007
    [Abstract](497) [HTML](0) [PDF 595.35 K](192)
    Abstract:
    针对重轨生产线中重轨表面缺陷在线检测的困难,提出了基于机器视觉检测的系列关键技术,包括缺陷成像机理、多CCD组合采集器、图像处理技术、基于多空间的缺陷参数提取等.通过图像校正、基于支持向量机(SVM)的直线(面)边缘搜索算法和缺陷特征参数提取等核心技术,可获得完整的重轨全表面的图像,其提纯的缺陷特征参数可以进行模式识别.实验验证表明,采用上述关键技术对重轨表面常见的缺陷识别,正确率在80%以上,达到了工程检测的需要.
    8  Angular Acceleration Measurement System and Its USB Data Acquisition
    WANG Xin LIU Xin
    2007, 30(9):33-35. DOI: 10.11835/j.issn.1000-582X.2007.09.008
    [Abstract](808) [HTML](0) [PDF 293.52 K](162)
    Abstract:
    The angular acceleration of a rotary shaft is one of the most important parameters for revolution which is widely employed in practical applications. The principles and approaches for measuring angular mechanism, acceleration were studied to find a feasible way to obtain the accurate and successive value of angular acceleration. A new type of data acquisition device with USB module was developed based on microcontroller AT09S8515 and USB interface controlling IC PDIUSBD12. It was convenient to test the width of rotary speed signal by using the unique function of the microcon-troller for automatically capturing the rising or falling edge of a square wave.
    9  Detecting Technology of Cabel Surface Defect Based on DSP and Image Recognition
    GAO Chao REN Ke GUO Yong-cai YANG Hui
    2007, 30(9):36-38. DOI: 10.11835/j.issn.1000-582X.2007.09.009
    [Abstract](669) [HTML](0) [PDF 339.71 K](154)
    Abstract:
    The damage of bridge cable directly hazards the normal use of bridge and the safety of people. The paper discussed the signal acquisition and detection system which takes embedded DSP processor as core technology, combined with CCD, video decode chip, SDRAM, FLASH ROM, and established the fast measuring algorithm of the surface corrosion and damage, which includes deteminating the processing region, improving medium filter, sobel edge detection and dynamic threshold segment, close operation of morphology, computing defect area and saving. The experimental resuits show that this method implemented the real-time, non-contact and intelligence detecting of cable surface defect and gives the specifications of the system.
    10  Temperature Measurement and Compensation for the Angle Error of Gyro
    ZHU Yue PAN Ying-jun LIU Yu LI Lei-lei
    2007, 30(9):39. DOI: 10.11835/j.issn.1000-582X.2007.09.010
    [Abstract](906) [HTML](0) [PDF 386.41 K](186)
    Abstract:
    The temperature drift is one of the most important error sources and influences the measuring accuracy of gyroscope greatly. The more exact temperature is measured, the more accurate angular error could be compensated. So the improvement of temperature measurement is significant to the system accuracy. A temperature measurement and compensation system was designed and experimented. The temperature of solid vibration gyroscope developed by ourselves was measured, analyzed and corrected. At last, the mean square deviation reduced from 31. 418 2 to 0.547 7, The experiment results proved that the design of soft and hardware is effective.
    11  Comparison on Physical and Chemical Characteristics and Electric Properties of Three Types of Vegetable Insulating Oil
    LI Jian DANG Jian-liang YANG Li-jun ZHANG Jie JIANG Tao-sha
    2007, 30(9):42-45. DOI: 10.11835/j.issn.1000-582X.2007.09.011
    [Abstract](675) [HTML](0) [PDF 434.83 K](253)
    Abstract:
    Three types of vegetable oil, transgenic rapeseed oil, transgenic peanut oil and cotton-seed oil, are used as raw materials in experiments to obtain the refined insulating oil. The dosage of reagent in experiments is studied for vegetable insulating oil refinement. Furthermore, basic physical and chemical properties of the three types of vegetable insulating oil are analyzed. The electrical properties including breakdown voltage, dissipation factor, dielectric constant, and volume resistance are studied and presented. By compared with each item of properties of the three types of vegetable insulating oil, rapeseed-oil-based insulating oil is considered to possess the best properties due to the fact that it is more abundant of mono-unsaturated fatty acid than the other two types of insulating oil.
    12  Numerical Simulation on EMI of Wire
    YU Ji-hui ZOU Zhi-xing LI Yong-ming LI Xu
    2007, 30(9):46-50. DOI: 10.11835/j.issn.1000-582X.2007.09.012
    [Abstract](749) [HTML](0) [PDF 424.56 K](194)
    Abstract:
    导线在电子电气设备的电磁兼容问题中占有重要地位,加有激励的导线不仅会对邻近的导线产生串扰,还会产生辐射.多导体传输线(MTL)方法被用于研究导线的串扰问题,金属平板上导线辐射问题的求解则采用了多导体传输线方法和时域有限差分法(FDTD)相结合的混合方法,最后还讨论了简单线路终端状态不同时导线的辐射情况.结果证明了所用方法的有效性,有助于加强对导线电磁干扰问题的研究.
    13  Pilot-plant Test of EAF Dust Treatment Include Zinc
    WU Cheng-bo DIAO Yue-chuan YANG Hui WANG Chao-dong ZhANG Bing-huai
    2007, 30(9):51-55. DOI: 10.11835/j.issn.1000-582X.2007.09.013
    [Abstract](693) [HTML](0) [PDF 387.22 K](150)
    Abstract:
    为综合利用含锌电炉粉尘,提出运用含碳球团的还原处理方法,并进行了扩大性试验,得到了还原焙烧法的合理工艺条件.试验表明:配碳的碳氧比C/O=1.2、还原温度1 150 ℃、料层厚度30 mm、加热时间65 min可取得较好的效果;还原后的球团为半金属化球团,其w(TFe)为50%左右,金属化率60%~70%,球团的残Zn含量在2%以下,是较好的高炉原料;Zn的还原挥发率达到90%左右,收集粉中ZnO含量在90%左右;PbO含量在2%以下,已达到等级氧化锌的标准,实现了含锌电炉粉尘的无害化和资源化利用.
    14  Industry Experiment on Parameter Optimizing of Final Electromagnetic Stirring
    LIN Guo-qiang XIE Zhi YU Xiao-fang LI Jun KONG Fan-jie JIA Guang-lin
    2007, 30(9):56-59. DOI: 10.11835/j.issn.1000-582X.2007.09.014
    [Abstract](490) [HTML](0) [PDF 356.66 K](1047)
    Abstract:
    针对末端电磁搅拌器现场应用存在的实际问题,对工业用末端电磁搅拌器内的磁感应强度分布,用CT-3型特斯拉计在线进行了全面测试.通过对测试结果的理论分析优化确定了现场应用的末端电磁搅拌器的电磁参数为:电流500 A,频率13 Hz,连续搅拌方式,使搅拌器中心磁感应强度达到119.1 mT,电磁力达到574.2 N/m3,固液界面处钢水最大流速达到0.163 m/s.在77B钢和GCr15-1轴承钢连铸生产中取得了显著改善铸坯中心缩松与偏析的良好冶金效果.
    15  Using a Neural Network with Nonlinear Self-feedback to Solve the Maximum Clique Problem
    LIU Huai-yi YANG Xiao-fan SUN Li-ping SI Pei WANG Can
    2007, 30(9):60-63. DOI: 10.11835/j.issn.1000-582X.2007.09.015
    [Abstract](511) [HTML](0) [PDF 348.55 K](962)
    Abstract:
    As the MCP is NP-hard, an efficient approach to treating this problem is to design appropriate recurrent neural networks. We develop a new algorithm for the MCP, which can, to a certain extent, prevent the associated neural network from falling into local optimal points. The proposed algorithm incorporates nonlinear self-feedback into the SLDN algorithm and has distinguished dynamical characteristics. Simulation results show that the performance of proposed algorithm is statistically superior to the SLDN algorithm.
    16  Statistical Characterization of Multiwavelet for Texture Retrieval
    SHANG Zhao-wei TANG Yuan-yan LIU Zheng-qi YAO Tong-qing
    2007, 30(9):64-70. DOI: 10.11835/j.issn.1000-582X.2007.09.016
    [Abstract](726) [HTML](0) [PDF 560.68 K](1502)
    Abstract:
    为了研究多小波性能,对多小波系数分布的统计特性进行了研究.多小波在实数域能同时具有正交、对称、短紧支撑和高消失矩等特性,单小波却不具有上述的性质,因此在理论上多小波比单小波具有更多的优势.提出并验证了多小波系数直方图服从于指数族分布;根据多小波的特点研究了其系数分布的一阶、二阶矩(共生矩阵)和系数直方图的统计特性,并应用于纹理特征的提取.通过理论分析和在纹理图像检索的对比实验说明在冗余预滤波方式下,采用二阶统计矩方法时多小波优于单小波.
    17  Web System Development Model Based on Access Security MVC
    CHEN Yu-xia LIU Sheng SI Hui-ping LIU Fei
    2007, 30(9):71-75. DOI: 10.11835/j.issn.1000-582X.2007.09.017
    [Abstract](568) [HTML](0) [PDF 443.95 K](1186)
    Abstract:
    In order to reduce the inconvenience of maintainability and reusability of web application system based on MVC, which is brought by the code of access security and coupling tightly with other modules, A web system development model based on access security MVC is put forward. The main framework and running process are provided and the key techniques of this model are researched. The model is applied to the practical development of the network distribution management system.
    18  Disign and Implementation of Speaker Recognition System Based on FPGA
    HE Wei HU You-wen ZHANG Ling CHEN Fang-quan
    2007, 30(9):76-79. DOI: 10.11835/j.issn.1000-582X.2007.09.018
    [Abstract](612) [HTML](0) [PDF 422.79 K](1078)
    Abstract:
    Aiming at the shortcoming of low recognition and training speed in embedded speaker - recognition system based on DS Phard-core processor, a new scheme of system based on FPGA and vector quantization principle is presented. In the speaker-recognition system based on the vector quantization and generation algorithm, a fitness parallel process hardware structure is presented by the scheme which consumes much less time than software processing while getting the fitness. The test shows that the system uses this method obtains both high recognition rate and higher speed in training and recognition.
    19  OFDM Channel Estimation Based on Signal-noise Subspace
    ZENG Xiao-ping ZHAO Tie-jun HAN Qing-wen
    2007, 30(9):80-83. DOI: 10.11835/j.issn.1000-582X.2007.09.019
    [Abstract](673) [HTML](0) [PDF 408.08 K](1235)
    Abstract:
    在分析基于奇异值分解(SVD)的线性最小均方误差(LMMSE)估计的实现原理的基础上,结合信号、噪声子空间理论,给出了矩阵低阶近似时秩的选取方法.计算机仿真结果表明提出的低阶秩选取准则能够提高该算法在各种工作环境下的适应性.
    20  Pole Normal Assignment for Linear Control Systems
    XIAO Min-qing CAO Chang-xiu CHEN Jin-yu YANG Jia
    2007, 30(9):84-87. DOI: 10.11835/j.issn.1000-582X.2007.09.020
    [Abstract](698) [HTML](0) [PDF 321.36 K](1135)
    Abstract:
    The eigenvalues of a normal matrix are not sensitive to its elements perturbation. Based on the fact, the pole normal assignment problem for linear control systems is discussed. The aim is to find a state feedback control law. When the closed-loop system has desired poles and the closed-loop system matrix is a normal matrix, the robustness of the control system is enhanced. For linear constant systems, a necessary and sufficient condition is given to normal assignment of the desired poles. When the condition holds, a unified expression of the state feedback control laws is showed. An example is given for illustration of the proposed algorithm.
    21  Design and Research of TT & C-oriented Generation of Digital Range Environments
    LIU Chen-guo CHAI Yi QI Fei WEI Hong-bo
    2007, 30(9):88-92. DOI: 10.11835/j.issn.1000-582X.2007.09.021
    [Abstract](905) [HTML](0) [PDF 506.61 K](1451)
    Abstract:
    Based on the requirements of the space range informatization, the paper discusses the necessity of digital range environment construction; analyzes the function and the main characteristics of digital space range environment, and suggests the constitution and system architecture of digital range environment. The key techniques of digital range environment creation applying visualization interactive simulation are also analyzed and discussed, which include the techniques of 3D-terrain generation, a fast algorithm for 3D-modeling based on complexity, the design of distributed simulation environment and the human computer interaction, etc.
    22  Positive Solutions of a Kind of Special Nonlinear Neumann Boundary Value Problems
    YAO Qing-liu
    2007, 30(9):93. DOI: 10.11835/j.issn.1000-582X.2007.09.022
    [Abstract](684) [HTML](0) [PDF 287.14 K](908)
    Abstract:
    The purpose of this paper is to consider a kind of special nonlinear Neumann boundary value problems. The kind of boundary value problems has not Green function. Using suitable transformation,we can change these problems to general Neumann boundary value problems. By applying integral equation and degree theory on cone,the existence of n positive solutions is proved for the kind of problems,where n is an arbitrary natural number.
    23  The Planar and Spatial Central Configurations for N 1-body Problem
    ZHU Chang-rong LUO Guang-ping
    2007, 30(9):96-98. DOI: 10.11835/j.issn.1000-582X.2007.09.023
    [Abstract](593) [HTML](0) [PDF 236.35 K](1025)
    Abstract:
    研究了在单位质量椭球上的向量场与中心构型的关系,得到以正N-边形为基底的N 1-体问题构成的空间和平面中心构型.可以得到结论:对于任意的N,N≥2,平面中心构型总是存在的;但对于空间中心构型,仅当N≤472时存在一对中心构型,一个向上,另一个向下,而当N≥473时就不存在非平面的中心构型.
    24  One the Iteration of Fixed Point for Non-self Asymptotically Nonexpansive Mappings in Banach Space
    TIAN You-xian CHENG Qun
    2007, 30(9):99-104. DOI: 10.11835/j.issn.1000-582X.2007.09.024
    [Abstract](711) [HTML](0) [PDF 332.39 K](128)
    Abstract:
    设E是具有一致正规结构的实Banach空间,其范数是一致Gateaux可微的,设C是E的非空有界闭凸子集.T:C→E是渐近非扩张非自映象.证明了在适当条件下,渐进非扩张非自映象的广义Reich迭代序列的强收敛性,从而改进和推广了Reich、Witemann等人的结果.
    25  Thermodynamics Study on the Adsorption of Cordycepin by Cation-exchange Resin
    WANG Gui-xue LI Gang MAO Xian-bing ZHU Hua-li
    2007, 30(9):105-108. DOI: 10.11835/j.issn.1000-582X.2007.09.025
    [Abstract](740) [HTML](0) [PDF 313.08 K](146)
    Abstract:
    研究了732阳离子交换树脂(001×7)对虫草素的吸附热力学特性.在所考察的温度和浓度范围内,001×7对虫草素吸附平衡数据符合Freundlich吸附等温方程,且为优惠型吸附.测试了虫草素在001×7上的吸附焓、自由能和吸附熵,结果表明吸附是吸热过程;并对虫草素的吸附行为作了合理解释,进一步通过虫草素的穿透曲线验证了虫草素吸附热力学结论.
    26  The Design of Heart Function Detection System Based on the Virtual Instrument
    PI Xi-tian HEI Xiao-guang ZHENG Xiao-Lin CHEN Feng LI Yong-an HOU Wen-sheng YANG Jun LU Bo
    2007, 30(9):109-112. DOI: 10.11835/j.issn.1000-582X.2007.09.026
    [Abstract](657) [HTML](0) [PDF 393.81 K](223)
    Abstract:
    设计了一种基于虚拟仪器的具有心电采集和踏车控制功能的心功能检测系统.系统采用自行设计的数据采集卡来实现心电数据的安全测量和输出控制指令.数据采集卡由心电信号放大电路、信号采集电路、踏车控制电路组成,通过USB接口与PC机相连.系统软件采用LabVIEW编程语言,可实现数据库管理、心电波形显示、心电特征点分析、实时心率显示、ST段识别、踏车控制、数据即时存储、波形回放以及打印诊断结果等功能.
    27  Analysis on Location Selection for Real Estate Development Based on Set Theory
    HUANG Zheng-jun WAN Ji-ye LI Hua-min
    2007, 30(9):113-116122. DOI: 10.11835/j.issn.1000-582X.2007.09.027
    [Abstract](949) [HTML](0) [PDF 422.78 K](237)
    Abstract:
    In order to increase the early decision-making accuracy of the real estate development and lower the overall risk of real estate investment, this paper explored the locations for projects of real estate development in the aspects of theoretical methods and technical levels. The evaluation system of housing project sites was established. It constructed the set model for real estate development projects and studied the concrete operation of the model in practice with a prac- tical example with the rough set theory. The test results showed that the method can reduce impacts from the experience and subjective awareness of decision-makers and increase the accuracy of location decisions.
    28  Physical and Mechanical Properties of YangLa-copper'''' s Tailings
    YIN Guang-zhi YANG Zuo-ya WEI Zuo-an TAN Qing-wen
    2007, 30(9):117-122. DOI: 10.11835/j.issn.1000-582X.2007.09.028
    [Abstract](678) [HTML](0) [PDF 462.25 K](468)
    Abstract:
    以云南省迪庆矿业公司羊拉铜矿的尾矿料为研究对象,按照该矿尾矿堆坝工艺(中线法)的颗粒组成要求,通过人工配料对该矿的全尾矿砂、粗尾矿砂、细尾矿砂的物理力学性质进行了全面测试与研究.对三种尾矿砂的测试结果分析发现:尾矿砂的压缩性、渗透性与尾矿的粒径、孔隙比的关系比较密切.尾矿的各向异性和非均匀性对尾矿的渗透性有很大影响,试验结果显示粗、细尾矿的渗透性都要大于全尾矿的渗透性.还对3种试样的抗剪强度特性进行了分析,试验结果不仅为羊拉铜矿尾矿坝的设计及其稳定性评价提供了基础数据,而且为研究尾矿土的工程力学特性等提供了更详实的资料.
    29  Research of Character and Actuality of MSW in Songtao Reservoir Region,Hainan Province
    YANG Shui-wen WANG Li-ao YUE Jian-hua JIAO Yan-jing ZHOU Shu-chun MAO Yuan-yuan
    2007, 30(9):123-126. DOI: 10.11835/j.issn.1000-582X.2007.09.029
    [Abstract](914) [HTML](0) [PDF 403.04 K](216)
    Abstract:
    为了解海南省松涛水库流域生活垃圾的产量、组分特征和分布现状,对松涛水库流域白沙县雅叉镇和白沙农场生活垃圾清运量、回收率和清运率等进行了调查和采样分析,以及在农村典型的自然村设置生活垃圾收集设施,定时收集分析.结果表明:松涛水库流域城镇、农场、农村生活垃圾的人均产量分别为0.74、0.61、0.16 kg*d-1;生活垃圾平均回收率为10.15%,农村地区的回收率低于城镇;生活垃圾以易降解有机组分为主,玻璃组分含量较高,且不含有害固体废弃物.该研究将为松涛水库流域生活垃圾治理规划、综合利用和处理处置提供依据.
    30  Effect of Natural Resource on Improving Indoor Thermal Environment in Chongqing
    DING Yong LI Bai-zhan LUO Qing LIU Hong
    2007, 30(9):127-133. DOI: 10.11835/j.issn.1000-582X.2007.09.030
    [Abstract](783) [HTML](0) [PDF 666.69 K](235)
    Abstract:
    Analyzes the potentials of natural resource to improve the indoor thermal environment in Chongqing through the statistical analysis of natural resource including solar energy, wind, water and earth etc. The building forms, systems and principle of usage of natural resources are briefly analyzed through the building site-decision, building form design and computer simulation which will be the real reference for the design of building energy efficiency.
    31  Forecast of the Relation Between the Water Quality and the Wet-dry Zone of the Three Gorges Area
    YUAN Hui HUANG Chuan CUI Zhi-qiang HU Gang BAO Liang
    2007, 30(9):134-138. DOI: 10.11835/j.issn.1000-582X.2007.09.031
    [Abstract](805) [HTML](0) [PDF 426.10 K](151)
    Abstract:
    随着三峡工程蓄水的完成,三峡库区消落带将逐渐形成并进入淹没期.消落带初次进入淹没期后,长期吸附在消落带土壤中的氮磷等营养物质将逐渐进入水体,并由此对三峡水库水质产生一定的影响.模拟消落带土壤淹没后氮磷释放实验,根据实验结果和一级动力学方程,计算出消落带土壤进入淹水期后的氮磷释放速率方程,并分别预测了在高、中、低水平下库区各区县消落带土壤释放的氮磷总量.以典型的开县消落带为例,预测了开县消落带氮磷释放与水环境之间的响应关系,结果表明高水平条件下开县消落带土壤全淹后对水环境中TP、TN和氨氮浓度的贡献值均较小,但其所占预测负荷总量的百分比分分别为93.79%,69.65%和51.61%,
    32  Study on the Eutrophic Status and Genetic Toxicity of the Water Bodies in Guangzhou Section of Pearl River and Several Urban Lakes in South China
    YU Jiang YANG Yu-feng YANG Cui-chan
    2007, 30(9):139-143. DOI: 10.11835/j.issn.1000-582X.2007.09.032
    [Abstract](870) [HTML](0) [PDF 522.97 K](212)
    Abstract:
    为了解流域和人工湖泊的富营养化状况及遗传毒性,采用营养状态质量法和蚕豆根尖细胞微核技术,于2006年4-5月对珠江广州河段与广州、惠州、深圳城市湖泊13个代表性采样点的富营养化现状及遗传毒性进行了调查研究.结果显示,水体总氮(TN)、总磷(TP)、化学需氧量(CODMn)等指标大部分超过了III类或IV类水质标准(GB3838-2002),富营养化评分值E范围为50~83,且与水体叶绿素a(Chla)含量成正相关,除惠州平湖为中度富营养化水平外,其余水体均已呈富营养化状态;运用蚕豆根尖细胞微核技术,发现13个采样点水样的微核率(MCN‰)均值与阴性对照组比较有显著性差异(F=5.899>F0.01=2.89,p<0.01),CODMn、TN、TP等指标与MCN‰之间存在线性相关,提示富营养化水体中存在遗传毒性物质,能诱导蚕豆根尖细胞微核率升高,而生活污染和工业污染是造成这两类水体污染的主要原因.
    33  Research on Mapping Method of Customer Need Information in Product Family Improvement
    CHEN Feng YE Shi-qin JIANG Yan DAN Bin
    2007, 30(9):144-147. DOI: 10.11835/j.issn.1000-582X.2007.09.033
    [Abstract](734) [HTML](0) [PDF 396.88 K](163)
    Abstract:
    Aiming at ensuring that product family improvement is based on customer needs while taking full advantage of enterprise history database, firstly, customer needs in the product family improvement are expressed. Then a method of realizing the mapping of customer needs to functional requirements is presented, which is based on quality function development and association rule mining. Finally, an example illustrates the good application of the method.
    34  Game Analysis of Vertical Cooperative Advertising with Price Discount
    FU Qiang ZENG Shun-qiu
    2007, 30(9):148-153. DOI: 10.11835/j.issn.1000-582X.2007.09.034
    [Abstract](672) [HTML](0) [PDF 556.40 K](1536)
    Abstract:
    This paper studies the problem of cooperative advertising of two-echelon supply chain when the manufacturer offers a price deduction to consumers. And the equilibrium outcomes in a two-stage game and a coordinated co-op game are discussed and compared respectively. The results demonstrate that, under a certain condition, the retailer will increase local advertising effort if the manufacturer offers more price discount to customers directly. For any given price discount, the total profit for the supply chain with cooperative scheme is always higher than that with the non-cooperative scheme, and we find that the price discount will only be suitable for the merchandise with price sensitive demand. Then the Nash bargaining model is utilized to determine the allocation of the entire system profit gain. Finally, a numerical example is given to confirm the above conclusion.
    35  Advantage Comparative Theory and Chongqing Special Industries
    FAN Qing-ze WANG Xiao-ming
    2007, 30(9):154-158. DOI: 10.11835/j.issn.1000-582X.2007.09.035
    [Abstract](883) [HTML](0) [PDF 474.14 K](1084)
    Abstract:
    应用比较优势理论,通过对产业(行业)区位商的计算与分析比较,确定仪器仪表及文化办公用品机械制造业、交通运输设备制造业、旅游业、黑色金属矿采选业、烟草加工业、非金属矿物制品业、化学原料及化学制品制造业、医药制造业等十五大产业为重庆特色产业.根据重庆特色产业的发展,大力实施产业集群化发展战略,培育摩托车产业、汽车产业、仪器仪表产业、化工产业、铝业等十大具有地方特色的区域性集群,从而加快重庆特色产业的发展.

    Current Issue


    Volume , No.

    Table of Contents

    Archive

    Volume

    Issue

    Most Read

    Most Cited

    Most Downloaded