高科技迷你住宅——解决都市工薪移民住房问题的探索

为了解决日益尖锐的都市住宅问题,笔者根据多年一、二级开发设计管理经验,多角度分析了现有都市住宅开发存在的问题,得出结论:按现有的开发模式无法解决都市工薪移民的住房问题。因此笔者受电子产业的启发,转变开发思路,针对性地引进了软件概念,并将住房主体和土地分离,以全新住舱和泊位的方式解决了困扰已久的住房问题,而且革命性的提出一种全新的居住理念,它将顺应人们新的生活需要并升华推动人们生活模式的改变。     

感悟迷你空间

通过茂密的竹林、环形水渠、鲜花盛开的植物墙、蔓生植物盘生的竹林骨架等要素,营造宁静、幽深的进你花园空间,让人们用所有的感官功能去感悟它的不同:聆听潺潺的流水、秋千的细语;欣赏植物墙的花朵、石板间的青苔;体验凹凸不平的贝壳路面……     

福州利达大厦空调设计

概括介绍了这座综合性商品建筑的空调设计，著讲述如何根据其不同使用功能和商品建筑的特点选择空调方案。     

回转体轧制导板机构的设计

本文设计了SG70螺旋孔型微型斜轧机的导板机构.导板是轧制成形工艺中非常重要的一部分.它与轧辊孔型一起构成轧件的变形空间.导板的设计、加工、调整对轧件成形起着重要的作用.当对轧件尺寸精度要求较高时,对导板的要求就更高,导板的设计合理与否也是决定轧制成形成功与否的重要因素之一.该微型轧机原导板不能满足轧制连续成形的需要,...     

微型汽车发动机舱散热性优化研究

基于发动机舱内外流场和温度场数值模拟,根据汽车在不同行驶工况下的流场和温度场数值计算结果,对发动机舱的流场特性、散热性能、温度场、进风口设计进行分析;依据仿真分析结果提出发动机舱散热改进设计方案;在相同试验条件下,分别对某微车原车状态和对发动机前舱布局进行相应改进后的状态,进行室内整车环境模拟实验.     

Directly Compressed Mini Matrix Tablets Containing Ibuprofen: Preparation and Evaluation of Sustained Release

ABSTRACT

Directly compressed mini tablets were produced containing either hydroxypropylmethylcellulose (HPMC) or ethylcellulose (EC) as release controlling agent. The dynamics of water uptake and erosion degree of polymer were investigated. By changing the polymer concentration, the ibuprofen release was modified. In identical quantities, EC produced a greater sustaining release effect than HPMC. Different grades of viscosity of HPMC did not modify ibuprofen release. For EC formulations, the contribution of diffusion was predominant in the ibuprofen release process. For HPMC preparations, the drug release approached zero-order during a period of 8 h. For comparative purposes, tablets with 10 mm diameter were produced.     

采用ACE构建微总线

针对企业级分布式应用系统,采用ACE框架设计并实现了一个基于ACE的微总线架构,构件间的接口是数据式接口,挂接在总线上的构件按照协议具备驱动能力,构件采用六层互操作参考模型。该微总线可以应用于灵活性与复杂性适度的软总线的系统开发,目前已成功应用于工程实践。     

Design of a robust force controller for the new mini motion package using quantitative feedback theory

The use of hydraulic systems in industrial applications has become widespread due to their efficiency advantages. In recent years, hybrid actuation system, which combines electric and hydraulic technology in a compact unit, can be adapted to a wide variety of force, speed and torque requirements. Moreover, the hybrid actuation system has dealt with the energy consumption and noise problem existed in the conventional hydraulic system. Mini motion package (MMP) is one type of the new low cost hybrid actuator. This MMP is considered as a novel linear actuator with various applications such as robotics, automation, plastic injection-molding and metal forming technology. However, this efficiency gain is often accompanied by a degradation of system stability and control problems. In this paper, to maintain robust performance requirement, tracking performance specification, and disturbance attenuation requirement, the design of a robust force controller for the new hybrid actuator using quantitative feedback theory (QFT) is presented. A family of plants model for MMP is obtained from experimental frequency responses of the system in the presence of significant uncertainty. Experimental results show that highly robust force tracking by the MMP actuator could be achieved even if the stiffness of environment and set-point force change. In addition, it is understood that the new system has energy-saving effect even though it has almost the same response as that of valve controlled system.     

MUH姿态增稳控制系统设计与实现

为使微小型无人直升机(MUH)可以在各种地理环境及天气状况下平稳飞行,设计实现一个低成本的姿态增稳控制系统。其中,姿态获取模块通过基于滤波切换的重力场互补滤波估计算法得到高精度的姿态反馈,增稳控制模块采用多回路串级模糊PI控制,利用角速率内环提高系统的稳定性。实验结果表明,该系统具有良好的增稳控制效果,且成本低廉,便于应用推广。     

改进Mini Batch K-Means时间权重推荐算法

传统的协同过滤算法存在数据稀疏、可扩展性弱和用户兴趣度偏移等问题,算法运行效率和预测精度偏低。针对上述问题,提出一种改进的Mini Batch K-Means时间权重推荐算法。采用Pearson相关系数改进Mini Batch K-Means聚类,利用改进的聚类算法对稀疏评分矩阵进行聚类,计算用户兴趣评分并完成对稀疏矩阵的填充。考虑用户兴趣随时间变化的影响,引入牛顿冷却时间权重计算相似度,并基于已填充评分矩阵进行相似度加权计算,得到项目最终评分。实验结果表明,与传统协同过滤算法相比,该算法的平均绝对误差下降了31.08%,准确率、召回率、F1值均有较大提升,具有较高的评分预测精确度和准确度。