感应加热弯管管端面垂直度和弯曲角度检测方法的改进

在管道弯管检测工作中,发现《钢制弯管》(SY5257-91)和《西气东输工程用感应加热弯管技术条件》(Q/SYXQ16-2002)两个标准规定的对弯管管端面垂直度和弯曲角度检测方法的可操作性不强,因此提出了改进的检测方法。实践证明,此改进方法能明显提高检测结果的真实性、有效性和准确性。     

Plus cupping degrees do not form an ideal

~~Plus cupping degrees do not form an ideal~~     

Standardized low-load repetitive work: evidence of different motor control strategies between experienced workers and a reference group

The purpose of this laboratory study was to evaluate the possible differences in motor strategies to a new standardized low-load repetitive work task in between healthy experienced workers and a reference group. Work task event duration, i.e. working rhythm, cutting forces, surface electromyographic (EMG) activity from four shoulder muscles, postural activity, and arm and trunk movements in 3D were recorded during low-load repetitive work simulation. The experienced group showed lower EMG activity and frequency contents (P<0.05), more abducted position of the upper arm and forward flexion of the trunk prior to work simulation (P<0.05), and increased arm and trunk range of motion (P<0.05) compared with the reference group. The results highlight that experienced butchers have a different motor strategy compared with a reference group, i.e. more variable form of coordination pattern. Furthermore, the initial implementation of a possible protective motor strategy by experienced workers might be a very important prognostic factor.     

全球化条件下的“异域产品”与“异域消费”

利用了“异域文化学”的范式探讨“跨文化营销”领域,界定了“异域产品”概念,探讨了异域产品消费的动机和异域产品接受类型,提出了异域产品的设计原则。     

Hybrid attribute reduction based on a novel fuzzy-rough model and information granulation

Feature subset selection has become an important challenge in areas of pattern recognition, machine learning and data mining. As different semantics are hidden in numerical and categorical features, there are two strategies for selecting hybrid attributes: discretizing numerical variables or numericalize categorical features. In this paper, we introduce a simple and efficient hybrid attribute reduction algorithm based on a generalized fuzzy-rough model. A theoretic framework of fuzzy-rough model based on fuzzy relations is presented, which underlies a foundation for algorithm construction. We derive several attribute significance measures based on the proposed fuzzy-rough model and construct a forward greedy algorithm for hybrid attribute reduction. The experiments show that the technique of variable precision fuzzy inclusion in computing decision positive region can get the optimal classification performance. Number of the selected features is the least but accuracy is the best.     

基于隶属度函数的数据融合方法探讨

本文提出了利用建立隶属函数法,确立数据隶属度在数据融合过程中的作用,并由此也可将其作为检测设备系统故障的一种方法,并分析采用该方法的前提线性度。     

基于遗传算法的提高排课满意度的研究

教学课程的安排,一直是各个学院最头痛的问题。除了排课时段受到教室等资源制约外,如何使排出的课表使教师们满意,是我们曾经研究时一直忽略的问题。此研究以教师的观点来定义对排课的满意度,并将授课时段和教室等限制融入基因序列中,测试结果显示遗传算法的优异表现。其适应函数的图表,可呈现世代演化的成果。本研究希望能提供学校排课人员一个新的思考方向。     

基于SQL Server 2000的通用模糊查询工具设计

本文设计并实现了一个基于SQL Server 2000的通用模糊查询工具,该工具可以把带权重的模糊查询转换为标准的SQL语句。用户可以对SQL Server中建立的任何数据库表进行模糊查询。系统提供了以下功能：定义模糊谓词及其隶属函数;定义模糊算子;构造带权重的模糊的、精确的或混合的查询语句,权重和阈值可以由用户给出。满足查询条件的记录将根据匹配度的降序输出。本系统的设计方法也可以推广到其他的数据库系统,如Oracle,Access等。     

精氩塔工况波动的原因分析与调整

介绍了粗氩塔和精氩塔的工况调整，分析了精氩塔内波动的原因，最终确认引起精氩塔波动的主要原因是液氮过冷度的影响，进行调整后，达到了稳定的工况。     

A new heuristic algorithm for rectangle packing

The rectangle packing problem often appears in encasement and cutting as well as very large-scale integration design. To solve this problem, many algorithms such as genetic algorithm, simulated annealing and other heuristic algorithms have been proposed. In this paper, a new heuristic algorithm is recommended based on two important concepts, namely, the corner-occupying action and caving degree. Twenty-one rectangle-packing instances are tested by the algorithm developed, 16 of which having achieved optimum solutions within reasonable runtime. Experimental results demonstrate that the algorithm developed is fairly efficient for solving the rectangle packing problem.