品质机能展开法在科技辅助产品设计中的应用--以偏瘫患者轮椅为例

使用者需求及临床专家意见，是医疗科技辅具开发人员在产品开发中重要的参考准则。为了要在竞争的产业环境中获得产品优势，产品设计与开发人员需不断努力，方能确保产品在市场上的竞争力。品质机能展开(Quality Function Deployment，QFD)是一系统性方法，在产品企划和开发阶段能充分掌握使用者需求及临床专家意见，进而提升开发团队的能力并降低产品失败率。临床上，偏瘫患者常会以非患侧的上肢与下肢来驱动普通轮椅，由于不对称的施力方式，会造成对患者的危险与伤害。本研究利用品质机能展开法，建立以顾客期望为基础的产品开发程序，企划产品的发展方向，作为偏瘫患者轮椅产品设计与开发的依据，期望能提升偏瘫患者的生活品质。     

基于分层制造和数控加工的复合快速成形技术

为克服现行分层制造技术(可制造的原型尺寸小、精度低、可选用材料种类有限)和数控加工(难于直接制造复杂形状、需用夹具固定工件)存在的缺点,把分层制造和数控加工的优势结合起来,研究开发了基于三维层(3D layer)的、材料堆积成形与去除成形交替并行的复合快速成形工艺,并论述了三维层的生成方法和根据三维层的特点设置必要的水平支撑来快速固定被加工工件的方法。为验证该方法的可行性,以复杂曲面组成的汽车手把为对象,进行了成形实验,其制造精度为0.05mm,整个制作过程需要5h。     

改善宽带PCS信道的非线性补偿算法

在数据高速传输时为了补偿信道失真，使用了分集接收和等量获取结合技术。对设置在分集支线上的具有补偿算法接收结构的DSSS BPSK系统，以SNR的平均比特误码率来评价其性能。给出了具有较高数据补偿能力的多级Tap修正算法。为评价提出了算法在实际系统应用实现，利用了美国JTC个人移动通信用RF信道特性和系统应用模型标准，用平均比特误码率收敛速度进行了比较与分析。     

AISI 4340钢马氏体相变的研究

采用膨胀法对AISI 4340钢在900~1 150℃几种不同温度下进行奥氏体化,以得到不同的奥氏体晶粒度(AGS),然后快速冷却到室温,得到马氏体组织.实验结果表明:奥氏体晶粒度和晶界析出相对马氏体相变动力学,尤其是马氏体转变温度(tms)产生很大影响.总的趋势是AGS越大,tms越高.在不同的奥氏体化温度段,会有不同的C,N化合物析出,对马氏体形核产生影响.在奥氏体化温度低于1 000℃时,AGS增大,tms快速增加.其原因主要是由于AlN等晶界析出相对马氏体形核的促进作用.在奥氏体化温度高于1 050℃时,tms随AGS增大而升高,这是因为TiC等溶解温度较高的化合物在晶界析出对马氏体形...     

Metamorphosed mafic rocks with N-type MORB geochemical features in Hainan Island-Remnants of the Paleo-Tethys Oceanic Crust?

A number of metamorphosed mafic rocks occurred within the Paleozoic strata in the Chenxing and Bangxi regions at the northern side of the Changjiang-Qionghai Fault in Central Hainan Island. These metamorphosed mafic rocks are tholeiites in chemistry. They are characterized by extreme depletion of Th, Nb, Ta and LREEs, resembling the depleted N-type mid-ocean ridge basalts (MORB). Field relations suggest that the protolith of the metamorphosed mafic rocks were likely formed in Paleozoic. These metamorphosed mafic rocks with N-type MORB geochemical features were probably the remnants of the Paleo-Tethys oceanic crust.     

风化碎石回填土的稳定性试验研究

在大量三轴实验的基础上。对全风化的花岗岩回填土的稳定性进行了分析研究,对试样的相对压实度、初始含水量、应变速率、固结比、试样的重塑、排水条件因素等对稳定状态的影响进行了试验研究，试样在轴向应变为20％左右时达到稳定状态,试样的稳定状态线在q55～p55图中是唯一的直线。而在u55～logp55图中则不是唯一，其位置依上述因素的不同而变化。     

An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

橡胶混凝土改良之研究

探讨橡胶混凝土之改善,借由橡胶表面改质技术的开发,并应用原子力显微镜直接量测橡胶以水泥水化物间之作用力,以作为橡胶表面改质的参考.文中除做简单之文宪回顾外,并以三种表面改质技术为例,说明橡胶混凝土改进方法之研究方法.     

基层干部培养使用机制研究

经济的迅速发展和社会的剧烈变动给基层干部的培养使用提出了更高的要求,针对出现的新情况、新问题,应树立科学发展理念,从组织、个人和发展三个视角审视基层干部队伍建设,为创新基层干部培养使用机制和解决基层干部培养使用的具体问题提供借鉴。     

Effect of Cu seed on the synthesis and characterization of FeCo alloy nano-particles by using polyol method

Fine metal particles with uniform shape,narrow size distribution and high purity are increasingly needed for specific uses in high tech industrial application.We report the direct chemical synthesis of FeCo alloy particles using the mixture of FeCl2·4H2O,Co(Ac) 2·4H2O(Ac:acetate) and NaOH in ethylene glycol,and then obtained FeCo alloy particles better dispersed by adding the polyvinylpyrrolidone(PVP) and also the size could be controlled by adding copper.The prepared nano-particles were characterized using FESEM,XRD and VSM.The mean diameter of these particles was varied in the range of submicrometer to nanometer with metal-ion concentration.FeCo particles showed the typical soft magnetic properties.