CAD/CAM技术在苗族银饰加工中的应用

CAD/CAM技术在苗族银饰中的应用要继承文化、艺术风格和典型加工工艺上的传统,保证在提高生产效率的同时不会让苗族银饰这一人类物质文化变味。要充分利用CAD/CAM强大的三维设计功能,快速设计出美观漂亮的新图案,利用软件CAM功能和数控加工设备快速高效地加工出银饰模具,提高整个苗族银饰产业的生产能力。     

加工时间可变的总完工时间排序两人合作博弈问题

研究工件加工时间与开始加工时间有关的情况下,两人合作共同加工一批工件的纳什博弈问题．每人有一台机器用于工件加工,以最小的总完工时间作为加工成本,通过确定这批工件的一个合理划分,使参与合作加工的两人都能得到满意的合作收益．     

体育专业家庭经济困难学生资助情况分析和对策研究——基于四所体育院校的调查

针对当前体育专业家庭经济困难学生资助中存在的一些问题,对河北体育学院、沈阳体育学院、北京体育大学、广州体育学院家庭经济困难学生进行了问卷调查,通过调查分析找出解决问题的方法和措施。认为应当建立科学的家庭经济困难学生认定制度体系,增加校内勤工助学岗位,完善国家奖助学金发放制度,加强信用管理,加强家庭经济困难学生的心理健康教育。     

在桥头堡战略背景下重建滇西宝玉石集散地和加工中心

滇西边境地区的保山、德宏自明清以来就是我国传统的宝玉石集散地和加工中心,由于诸多的原因一度衰落或者发展的不理想;在桥头堡发展战略的背景下,滇西边境地区成为我国西南对外开放的前沿,具有发展珠宝业特殊的地缘优势和资源优势,将滇西边境地区重新建设成为宝玉石交易的集散地和加工中心,从现实情况分析是可行的.     

Relationship between Working Environment,Self-Concept,Real-Ideal Self Discrepancy,and Functionality in Physical Education Teachers

Abstract

The major purposes of the present study were to determine to what extent and in what ways an individual's personality is affected by the working environment. Three questions were asked about the effect of working environment on: (a) realism or accuracy of self-concept, (b) agreement between real self and ideal self, and (c) functionality of personality characteristics. Subjects were 49 physical education faculty in three inner-city and three suburban Los Angeles area high schools. The Holmen Adjective Check List (HACL) was used to assess self-concept, real-ideal self discrepancy, and functionality. Results showed that: (a) suburban teachers had more accurate self-concepts than did inner-city teachers, (b) suburban teachers were seen as being more like their “ideal selves” than were inner-city teachers, and (c) individuals experienced in a given work setting were not necessarily seen as better adapted to that environment than those not working there.     

Changes in locomotive rates during senior elite rugby league matches

Abstract

The aim of this study was to quantify the changes in locomotive rates across the duration of senior elite rugby league matches. A semi-automated image recognition system (ProZone 3, ProZone®, Leeds, England) was used to track the movements of 59 players from six teams during three competitive matches. The players were classified into one of four positional groups: props (n = 9), back row (n = 9), pivots (n = 14) or outside backs (n = 27). Players' movements were classified as low, high or very high intensity running and reported as locomotive rates (distance covered per minute played) for successive quarters of each match. Analysis of variance revealed that only the outside backs showed a significantly lower overall locomotive rate during the final quarter compared to the first (P < 0.05). However, locomotive rates for high and very high intensity running during the final quarter were significantly lower (P < 0.05) than the first quarter among outside backs, pivots and props despite no change in the rate of involvements in contact. On the basis of these findings, it is suggested that high and very high intensity running locomotive rates may be more affective methods of detecting fatigue during competitive matches than overall locomotive rate.     

In search of invariant athletic behaviour in sport: An example from championship squash match‐play

Analysis of competitive sport performance from a priori observation is frequently used to prepare an athlete for a future contest. This practice necessarily assumes that the observed athletic behaviours are invariant, in that the data from an earlier contest apply to the next. We report different analyses of championship squash matches from 1987 and 1988 in search of such invariance and thus a general signature of athletic behaviour. The results show that once the preceding condition to an athletic response (shot) becomes more detailed, by either accounting for where on court the previous shot was played to, or by pairing the previous shot with its own antecedent, the corresponding response becomes more predictable (P > 0.25). This is especially the case for a squash champion when the forehand and backhand characteristics of his shot response are accounted for. The finding that the champion is more consistent if his forehand and backhand shot responses to a preceding shot are analysed separately, shows that the level of analytic detail is an important consideration if the derived information from sport analysis is to prepare an athlete reliably for future sport competition. Finally, we consider sport competition from an ecological perspective with regard to the natural organization and stability of non‐linear systems in an attempt to explain the empirical data.     

Document replication strategies for geographically distributed web search engines

Large-scale web search engines are composed of multiple data centers that are geographically distant to each other. Typically, a user query is processed in a data center that is geographically close to the origin of the query, over a replica of the entire web index. Compared to a centralized, single-center search engine, this architecture offers lower query response times as the network latencies between the users and data centers are reduced. However, it does not scale well with increasing index sizes and query traffic volumes because queries are evaluated on the entire web index, which has to be replicated and maintained in all data centers. As a remedy to this scalability problem, we propose a document replication framework in which documents are selectively replicated on data centers based on regional user interests. Within this framework, we propose three different document replication strategies, each optimizing a different objective: reducing the potential search quality loss, the average query response time, or the total query workload of the search system. For all three strategies, we consider two alternative types of capacity constraints on index sizes of data centers. Moreover, we investigate the performance impact of query forwarding and result caching. We evaluate our strategies via detailed simulations, using a large query log and a document collection obtained from the Yahoo! web search engine.     

中国式“不差钱”与中国式“钱荒”之悖论

最近中国式"钱荒"和前期中国式"不差钱"形成了强烈反差,并引发了全世界的关注。文章分析了对于"钱荒"目前盛行的5种假说:国际阴谋说、季节波动说、央行自制说、影子银行说和地方债务说,并从效度、信度和认知度3个维度对各种诱因进行测度评估,然后分析了中国与西方政治体制和财政体制的不同,预测了各种调控手段对未来中国经济可能造成的影响,最后得出央行应借机降低存款准备金率的建议!     

The Concept of Information Overload: A Review of Literature from Organization Science,Accounting, Marketing,MIS, and Related Disciplines

Based on literature from the domains of organization science, marketing, accounting, and management information systems, this review article examines the theoretical basis of the information overload discourse and presents an overview of the main definitions, situations, causes, effects, and countermeasures. It analyzes the contributions from the last 30 years to consolidate the existing research in a conceptual framework and to identify future research directions.