辐射空调房间人体与环境表面角系数的数值模拟求解

精确求解人体与环境表面间的角系数是研究辐射空调房间内人体辐射散热与热舒适的基本前提。结合角系数与有效辐射面积的离散公式,推导出人体与环境表面辐射角系数的数值模拟结果修正式,得到了中国人三维坐姿人体模型。在分别对坐姿人体与顶板、壁面、地板间的角系数模拟求解后发现,坐姿人体前后具有较大的方向性,人体对前方环境表面的角系数大于人体对后方环境表面的角系数。将角系数的数值模拟解与半解析解进行比较,对于顶板与垂直壁面,半解析解与模拟解较为吻合;对于地板,半解析解与模拟解存在较大的误差,并对半解析解进行了相应的修正。     

中天广场垂直度控制及施工测量

中天广场主楼８０层，采用内控法控制建筑物的垂直度，即在建筑物内建立控制网，在组成控制网的控制点上进行竖向投测，将控制网传到任一楼层，对建筑物进行垂直度测量和施工放样。在此基础上选择测量仪器，并对精度进行估算，保证了建筑物的垂直度。     

Selective digital filters with quadratic phase

A method for design of a new class of digital infinite impulse response filters realized as parallel connection of two all‐pass filters is presented in this paper. A new approach to approximation of quadratic phase of all‐pass filter at all frequencies is given. Chosen parallel structure offers opportunity for realization of filters with arbitrary shape phase. The presented algorithm is based on all‐pass filter phase approximation. Phases of both all‐pass filters approximate ideal quadratic phase in minimax sense at all frequencies. Such filters can be applied for chirp signal compression or expansion. Magnitude characteristic of described filters is very selective and elliptic‐like. Obtained filters are compared with elliptic filter and group delay corrector in cascade. For the same specifications, much better results are achieved by the proposed filters. Parallel connection of all‐pass filters introduces lower signal delay, and for a given maximal phase, approximation error demands less complex network. Examples to illustrate the proposed method are given. Copyright © 2016 John Wiley & Sons, Ltd.     

基于遗传算法不规则风电场的微观选址

采用遗传算法,结合MATLAB仿真软件,从而达到单风速单风向、平坦地形下不规则风电场的微观优化选址的目的,其方法是利用MATLAB仿真软件将不规则风电场边界提取到正方形中,通过不同网格化方向角下的正方形网格化方法对其网格化,从而利用遗传算法确定待安置风机的位置,最终实现风力发电成本的降低,产能的提高。     

坐便器坯裂缺陷的产生原因及克服方法

对某卫生瓷厂坐便器坯裂缺陷的产生原因做了分析,指出了泥浆性能对坐便器生产的影响,提出了解决坯裂缺陷的措施。     

考虑多需求场景的城市电动汽车充电站多目标规划

当前,多数研究基于用户出行路径确定EV充电需求,但是往往未考虑到多种不确定性。基于用户出行数据,考虑多种不确定性因素,在三种场景下对EV充电需求进行模拟,并采用K-means聚类算法得到三种场景下的充电需求。其次,基于此建立了一个综合考虑用户侧与非用户侧利益的多目标规划模型。另外,还提出了考虑多场景的改进排队理论对充电站定容,所提规划模型由NSGA-Ⅱ求解,并采用TOPSIS综合评价法确定规划方案。最后,以山东省潍坊市部分城区为规划区域,交通网耦合IEEE 69节点配电网为算例验证了所提规划模型的有效性与优越性。     

基于坐行为的坐具设计解析

以坐行为为研究出发点,论述了坐具设计与生活方式的互动关系,以及坐具造型以人为本的特征,通过典型实例论述了坐具对人体的高度契合、对多种生活方式的适应、满足消费者个性化需求方面、对使用者情感的回应,以及对周围空间的融合性方面的人性化设计的诸多表现。     

Systems in development: Motor skill acquisition facilitates three-dimensional object completion.

How do infants learn to perceive the backs of objects that they see only from a limited viewpoint? Infants’ 3-dimensional object completion abilities emerge in conjunction with developing motor skills—independent sitting and visual–manual exploration. Infants at 4.5 to 7.5 months of age (n = 28) were habituated to a limited-view object and tested with volumetrically complete and incomplete (hollow) versions of the same object. Parents reported infants’ sitting experience, and infants’ visual–manual exploration of objects was observed in a structured play session. Infants’ self-sitting experience and visual–manual exploratory skills predicted looking at the novel, incomplete object on the habituation task. Further analyses revealed that self-sitting facilitated infants’ visual inspection of objects while they manipulated them. The results are framed within a developmental systems approach, wherein infants’ sitting skill, multimodal object exploration, and object knowledge are linked in developmental time. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Optimal planning of distributed generation with application of multi-objective algorithm including economic,environmental and technical issues with considering uncertainties

This paper proposes a stochastic multi-objective model for integration of distributed generations (DGs) in distribution networks. The proposed model determines the optimal location and size of DGs by optimising different objective functions dependently and simultaneously subject to the operating constraints. If proper sizes of DGs are located in suitable sites and are also managed properly they can improve integrity, reliability and efficiency of the system. Regarding the widespread impact of uncertainties, some strategies must be devised in order to incorporate them well into power system modelling and hence achieve the best possible strategy to be adopted which its characteristics keep closer to reality. The most important uncertainties in network planning are load forecasting and market price errors. The proposed scheme is solved using non-dominated sorting genetic algorithms II, allowing the distribution company (DisCo) to exercise his/her personal preferences. To validate the effectiveness of the proposed scheme, simulations are carried out on a 33-bus distribution network and finally the attained results are discussed.     

一种分布式电源选址定容的两阶段优化规划方法

针对预先未给定分布式电源(distributed generator,DG)待选接入点的DG选址定容规划,提出了一种以配电网运行成本最小为目标的两阶段优化规划方法:第一阶段,建立了一个基于权系数的DG选址模型,并运用有效集法进行求解,筛选出一组DG待选接入点组合;第二阶段,提出了一种动态混沌粒子群算法来求解第一阶段所得出的待选DG节点的定容问题,并将最优规划结果值返回给第一阶段,从而确定出DG最优的接入节点和接入容量。最后通过美国PGE 69节点系统验证了所提模型的可行性以及方法的有效性。