An investigation for determining the optimum length of chopsticks

Chopsticks are one of the most simple and popular hand tools ever invented by humans, but have not previously been investigated by ergonomists. Two laboratory studies were conducted in this research, using a randomised complete block design, to evaluate the effects of the length of the chopsticks on the food-serving performance of adults and children. Thirty-one male junior college students and 21 primary school pupils served as subjects for the experiment. The results showed that the food-pinching performance was significantly affected by the length of the chopsticks, and that chopsticks of about 240 and 180 mm long were optimal for adults and pupils, respectively. Based on these findings, the researchers suggested that families with children should provide both 240 and 180 mm long chopsticks. In addition, restaurants could provide 210 mm long chopsticks, considering the trade-offs between ergonomics and cost.     

一个水工图形库系统(HGBS)的设计与实现

介绍了一个水工图形库系统（ＨｙｄｒａｕｌｉｃＧｒａｐｈｉｃｓＢａｓｅＳｙｓｔｅｍ）,阐述了系统的总体设计方案,并对系统中涉及的关键技术进行了讨论．     

Learning about tools in infancy.

These experiments explored the role of prior experience in 12- to 18-month-old infants' tool-directed actions. In Experiment 1, infants' use of a familiar tool (spoon) to accomplish a novel task (turning on lights inside a box) was examined. Infants tended to grasp the spoon by its handle even when doing so made solving the task impossible (the bowl did not fit through the hole in the box, but the handle did) and even though the experimenter demonstrated a bowl-grasp. In contrast, infants used a novel tool flexibly and grasped both sides equally often. In Experiment 2, infants received training using the novel tool for a particular function; 3 groups of infants were trained to use the tool differently. Later, infants' performance was facilitated on tasks that required infants to grasp the part of the tool they were trained to grasp. The results suggest that (a) infants' prior experiences with tools are important to understanding subsequent tool use, and (b) rather than learning about tool function (e.g., hammering), infants learn about which part of the tool is meant to be held, at least early in their exposure to a novel tool. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

现代商业中心的追求:南宁万达商业广场创作谈

如何全面把握现代商业购物中心的设计创作,是一个复杂而又吸引人的课题,整合商业功能互补的主力店,是定单式开发模式的核心思想,本文详细介绍了作者在南宁万达商业广场实际创作中的经验和体会。     

锣锅双边一次冲孔模

民族锣锅全国仅我们厂生产,只因为它适应西南少数民族生活的需要,特别是马帮必备的炊具,从生产技术这个角度看,它的制造工艺可以适用一般倒锥体日用器皿生产。     

石油化工企业智能巡检与协同故障应急处理系统

石油化工企业智能巡检与协同应急处理系统集成了包括全球定位技术GPS、地理信息技术GIS、移动数据采集技术GSM和即时通讯技术IM等多种当今安全科技研发领域最为先进的技术成果;可以帮助石油化工企业实现真正意义上的设备巡检与缺陷管理工作电子化、信息化和智能化,最大限度地减少漏检、错检等人为因素问题,以及缺陷或设备操作过程中的即时协同故障应急处理。此系统已经在抚顺石化乙烯生产车间得到了应用,效果良好。     

MatrixVB在信号处理与数据可视化系统设计中的应用

介绍了一个强大的COM组件库——Matrix VB,并把它应用到信号处理与数据可视化系统设计中,大大提高了编程效率,取得良好的效果。     

上游生产系统深度推广应用与数据监管的设想与实现

中石油的上游生产系统(A2系统)是一个分布式复杂的集成系统,并具有跨多个学科领域的特点。项目实施完成了,那么如何发挥它的作用、怎样才能充分利用项目的成果?给企业带来更大效益?该文从技术层面上给出您一个设想。     

RFID高速刀柄动平衡的研究

主要讨论HSK刀柄装配RFID装置后引起的动不平衡,建立动不平衡坐标系,采用lagrange方程建立了HSK刀柄动不平衡情况下的数学模型。以HSK63刀柄为例计算动不平衡量,用HAIMER动平衡机进行了动平衡实验,实验结果与理论计算基本相符,所推导的数学模型为RFID高速刀柄动平衡设计提供了理论基础。     

The tactual identification of shapes for coding switch handles.

Three experiments concerning the tactual identification of 16 differently shaped lever-switch handles are described. A comparison of the "find" method (S searched through a set to find a particular handle) with the "learn" method (S learned to associate a number with each handle) showed moderate agreement in specifying the predominant confusions and measuring their extent. Change in handle size (from ?-in. to 3/8-in. diameter) had no effect on learning. Two subtests of ten handles selected so as to avoid the predominant confusions were more homogeneous than the original set of sixteen handles, and each subset was learned quickly. (PsycINFO Database Record (c) 2010 APA, all rights reserved)