卫星太阳翼板面水平展开试验方法

为减少卫星姿态翻转,确保卫星光学载荷指向精度,提出卫星太阳翼板面水平展开试验方法.采用多自由度配重悬挂法抵消太阳翼水平展开试验过程中的重力,开展运动学及动力学分析、试验误差分析,完成卫星太阳翼板面水平展开试验验证.试验结果表明:相比传统展开试验方法,能够更真实的模拟太阳翼在轨展开运动;对太阳翼配重质量偏差、太阳翼吊挂质心偏差及系统摩擦力控制要求高.验证模型和试验方法的正确性,满足卫星太阳翼展开试验要求.     

Mobile cluster rekeying in tracking sensor network

Target tracking algorithm has been studied exten-sively in a traditional wired sensor network. With thedevelopment of wireless technology, the wireless sensornetwork has shown great advantages in many fields,such as military, disaster relief, etc. Currently, practi-cable protocol in sensor networks is still quite rare.Most proposals in target tracking are considered notingnetwork scale, security and so on.Here we propose a battlefield detection orientedsecure target tracking algorithm which or…     

Selection Model of Optional Parts in Suppliers Involved in New Product Development

1 Introduction In the current scenario of globalization and strong competitive environment ,it has become i mperative forthe companies to satisfy wide spectrumof customer demands . Many companies depend on their warranty pro-grams ,customer complains ,andinputs fromtheir sales staff to keep themin touch with their customers . Theproblem with this is that it leads to a focus on what is wrong withthe existing product or service , withlittle orno attention to what is right or what the customer re…     

基于质量功能展开的顾客满意度指数及其应用研究

顾客满意度测评是企业获取顾客信息,及时改进其经营管理薄弱环节,以增进顾客满意进而提高经济效益的有效工具.本文在美国顾客满意度指数模型基础上,考虑顾客信息的模糊性和随机性,应用模糊综合评判法建立了一种基于质量功能展开的顾客满意度测量方法,并以某生产染发产品的企业为例进行满意度的测评实践,测评结果与企业实际情况基本吻合.     

基于质量职能配置的产品规划模型

分析了质量决策过程,提出了一种基于质量职能配置的产品规划模型,该模型以顾客满意度最大为优化目标函数,以时间、技术特征的变化范围以及发迹技术特征所涉及的费用等为约束函数。该模型充分利用了质量屋中各组成部分的信息,考虑到了质量配置过程中存在的种种矛盾。最后,以某产品设计作为研究实例,建立了以市场调研结果和技术信息为基础的质量屋,给出了顾客需求与技术特征之间的关系数、每个技术特征的最小值和最大值、固定费     

顾客需求在QFD中地位的顾客满意度建模方法

为了客观的识别顾客需求,有效的获取顾客满意度,以质量功能展开(Quality Function Deployment,QFD)中顾客需求为研究对象,运用了层次分析法(Analytic Hierarchy Process,AHP)与QFD结合的方法,建立了AHP-CS模型,对顾客需求进行了定量识别,获得了顾客满意度.并以航天某公司为实例,对其顾客满意度测算公式做了修正,进而能够提高对QFD的后续工作的质量.     

柔性绳系辅助离轨系统展开动力学研究

以绳系辅助离轨系统为背景,考虑系绳质量和柔性因素,利用微元法建立柔性绳系辅助离轨系统的展开动力学模型;针对动力学方程的复杂的非线性和强耦合问题,采用伽辽金法进行离散化处理、求解及分析;并通过数学仿真来验证和分析柔性绳系辅助离轨系统的展开动力学特性.仿真结果表明,在绳系辅助离轨系统的展开过程中,系统的横向和纵向运动的位移...     

浅析地下管线施工过程各专业间的科学协调

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海尔集团负债经营模式探讨

主要从负债经营的理论与实践出发,探讨了海尔集团负债经营的新思路。通过员工与企业签订负债经营承包合同,企业将资源提供给员工,作为员工的负债,让其自主经营,以提高员工积极性、创造性,使企业的资源配置最优化,从而使企业加速发展。文中主要论述了海尔对负债经营的具体实施办法及所产生的效果。     

An effective node-selection scheme for the energy efficiency of solar-powered WSNs in a stream environment

Previous research on scheduling and solar power issues of wireless sensor networks (WSNs) assumes that the sensors are deployed in a general environment. While monitoring the stream environment, sensors are attached to the stream side to collect the sensed data and transmit the data back to the sink. The stream environment can be scaled in several similar environments. This type of geographic limitation not only exists in a stream environment but also on streets, roads, and trails. This study presents an effective node-selection scheme to enhance the efficiency of saving power and coverage of solar-powered WSNs in a stream environment. Analysis of the sensor deployment in the stream environment permits sensors to be classified into different segments, and then allows the selection of active nodes for building inter-stream connections, inter-segment connections, and intra-segment connections. Based on these connections, the number of active nodes and transmitted packets is minimized. Simulation results show that this scheme can significantly increase the energy efficiency and maintain the monitoring area in solar-powered WSNs.