Car side window kinematics

It is a demanding and time-consuming task to construct the side window mechanism of a car such that the deflections along the seals are minimized. The reason for this is that the window surface S delivered by the stylist, will in general not be movable in a proper way: It is required that the surface tightly moves along the seals. Deflections will necessarily occur no matter how much effort the engineer invests. This article describes how to find a spatial motion that minimizes seal deflection for some given automobile side window surface. Necessary but acceptable modification of the stylist’s surface S is also addressed, as well as the lifting mechanism design. It is argued that our systematic approach offers considerable savings compared to the prevailing trial-and-error approach.     

The effects of whole-body restriction on task performance

Many occupations, particularly involving maintenance operations, require individuals to perform both physical tasks and mental tasks in restricted spaces. Researchers have examined physical task performance under various restrictions; however, little research has investigated the effects of restricted space on cognitive tasks. Cognitive task performance in restricted spaces presents cognitive demands (i.e. the task itself) as well as additional physical demands (e.g. awkward postures), which may adversely affect task performance or operator workload. This research focused on the effects of whole-body restrictions on cognitive task performance. An experiment was conducted that examined 9 levels of restriction created in a laboratory: an unrestricted control, 6 single whole-body restrictions at two severity levels (2 lateral, 2 sagittal and 2 vertical) and 2 multiple restrictions (sagittal/vertical, lateral/sagittal/vertical). An inspection task served as the cognitive task. Behavioural, physiological and psychophysical measures were collected and analysed to measure the operator and performance effects. Operator response differences were found among the various forms of restriction as well as the severity level of similar forms of restriction. Increasing restriction significantly affected the behavioural and physiological operator response as opposed to the cognitive response.     

THE INFLUENCE OF GROSS BODY WEIGHT ON OXYGEN CONSUMPTION AND ON PHYSICAL WORKING CAPACITY OF MANUAL LABOURERS

A regression line relating oxygen consumption to rate of work has been calculated on 88 men from pairs of oxygen consumption and work-rate measurements at four different levels of work. A regression line has also been calculated for maximum oxygen intake against gross body weight for 338 men. From these regression lines it is possible to estimate the proportions of their maximum oxygen intakes a light and a heavy man would use in stepping on and off a 1 ft stool at 6, 12 and 24 times per minute. The slopes of the lines are such that both men would use similar proportions of their maximum oxygen intakes at each of the three rates of stepping ; the percentages are 26 per cent, 36 per cent and 55 per cent respectively.

The distribution of the gross body weights of the 338 men has been used to calculate a body weight such that 95 per cent of the men having weights above this value would have maximum oxygen intakes of 2-0 litres/min and more and therefore be capable of a moderate rate of work. A gross body weight of 132 lb is the estimate and 43 per cent of the population lie above this weight.

The ‘ tolerance ’ limits about the o.xygen consumption/gross body weights regression line are relatively narrow indicating that gros3 body weight is the major determinant in oxygen consumption when men lift their body weights against gravity. The ‘ tolerance ’ limits to maximum oxygen intake against gross body weight are wido, which suggests that the proportion of body fat influences the maximum oxygen intake value ot a given body weight.     

基于模糊神经网络直接转矩控制系统设计

针对传统的直接转矩控制中存在转矩、定子磁链波动大的问题,提出了一种结合空间矢量调制的模糊神经网络直接转矩控制方法。它运用模糊神经网络得到期望的任意相位空间电压矢量,再结合空间矢量调制直接对逆变器的开关状态进行控制,以达到减小转矩、定子磁链波动的目的。最后以TMS320F240为核心搭建了一个直接转矩控制系统,通过采集实验数据,分析该直接转矩控制系统与传统的直接转矩控制系统相比磁链和转矩波动明显减少,并具良好的响应性。     

城市人性空间解析

在当前的城市规划中注重物质空间的规划设计,但能同时关照到人的身体与心灵的设计才是人性化设计追求的目标。城市需要人性空间,人性空间是对日常生活与人的关怀与尊重,对宜人小尺度的推敲,以及对历史文脉的探求。其核心在于空间场所的塑造和历史文化的滋养,由物质空间与自然人文等多重维度共同构成。     

论中国审美思维在传统建筑空间环境中的体现

本文通过对中西方审美思维模式的比较,以及对中国"主体性、意念性、浑整性"三种传统审美思想特点的阐述,分析和阐释了这种思维特征在中国传统建筑空间环境创作中的具体表现和运用,实证了其在传统建筑空间营造中的广泛存在性,同时论述了传统审美思维在当今建筑设计领域的应用。     

Space,Politics and Desire: Configuring the Landscape in Post-Revolutionary France

The French Revolution radically reconfigured citizens' views of both real and imagined space. This article sets out to explore this process of reconfiguration and the relationship between politics and space from the period immediately before the French Revolution in 1789 to the collapse of the Empire in 1815 and its aftermath. Although the liberties brought about by the Revolution made access to space one of its defining characteristics, the spaces of the Revolution were characterized by a diversity in which each political constituency made a space of its own choosing. Those spaces took forms as diverse as the pastoral garden, tales of devil abduction, political festivals, space travel, and hallucinatory visions of Jean-Jacques Rousseau's Switzerland. It was only when Napoléon ‘terminated’ the Revolution in 1799 that space was given a rational, homotopic shape, a shape that endured until the imperatives of the Bourbon Restoration required another configuration.     

潘多拉魔盒都柏林财政部办公楼设计及改建

文章介绍了都柏林格拉夫顿事务所设计的爱尔兰财政部办公楼.设计从城市的角度出发,注重呼应历史遗存和延续建筑传统,同时采用有效的建筑设计策略赋予室内交通和使用空间以新的意义,并给予周围环境积极有效的界面设计.设计创造了一个崭新的政府办公建筑,在延续传统、呼应城市文脉的同时,塑造了办公楼亲切开放民主的建筑形象.     

Interference suppressing for cellular MIMO system based on turbo receiver

Space-Time Coding （STC）, which combines channel coding, modulation, and multiple transmit antennas, is a powerful scheme to achieve higher data rates and combat fading in wireless systems, in this paper, we propose a soil/cancellation turbo equalization scheme to suppress Co-Channel Interference （CCI） in STC systems. The simulation results show that the proposed method significantly improves the system＇s ability of interference suppression, while preserving the space-time structure.     

细部建筑--一条永恒的建筑之道

该文针对当代国内的建筑教育及建筑创作领域“重艺术轻技术、重宏观轻细部”的“中国式”通病,从若干方面阐述了细部对于建筑的意义,并认为这直接关系到建筑对于人的意义。