从审美意向看东西方服饰文化精神

通过对中西方服饰的审美文化的探讨,分析服装设计的审美特性和美学意蕴。从全面的、科学的角度来客观评价东西方服饰文化的审美价值。     

大庆油田水平井分流压裂技术

水平井分流压裂的技术原理是将水平井的水平段分成若干个单元，在每个单元的最佳部位进行射孔，每段的射孔数由孔径、单元数、设计施工排量等参数决定，射孔方案为压裂方案的有机组成部分。大庆油田已有5口水平井实施分流压裂，根据油层厚度分为两类：裂缝限制在油层内和裂缝穿透隔层贯穿多个薄油层。通过肇57-平35井和肇57-平33井进行的分流压裂贯穿多个油层现场试验，介绍了大庆油田水平井分流压裂的设计方法、压裂液体系、现场施工控制方法和效果分析方法。微地震裂缝监测结果表明，在最大施工排量7．5m^3／mim条件下，一次施工形成3～4条裂缝，加砂量最大达到75m^3（陶粒），平均砂比达到35％以上。水平井采用分流压裂技术施工后，初期产能可达到相邻直井压裂后产能的2．0倍以上。如何检测裂缝是否穿透了隔层并贯穿多个油层，是指导水平井分流压裂技术的选井选层，提高压裂效果的关键技术。图8表2参2。     

Performance Evaluation of Packet Mobile Communications through Level Crossing Analysis

In this paper the performance of a packet mobile radio network is studied inthe presence of shadow fading outage intervals.Under quite general assumptions for the medium access protocol,the probability mass function of the sequence of packets that may be lostdue to an outage interval is derived. It is seen that long sequences of lostpackets are likely to occur for typical values of the mobile speed andshadowing correlation parameters.For delay constrained sources, e.g., voice, the analysis is mainly focused atderiving the probability function of the sequence of dropped packetsand the probability of dropping. For data sources, the delay statistic isalso derived. In the latter case, the effect of finite buffer length isaddressed. Simulation is used to verify the accuracy of approximations introduced in the analysis.     

多目标模糊优选理论在水资源系统中的应用

开放的水资源系统分析理论应是水资源学与系统科学等多种学科的结合 ,介绍一种新兴而实用的水资源系统分析技术———半结构性决策系统模糊优选理论的基本原理及其应用。     

Development of a Sensor Fusion Strategy for Robotic Application Based on Geometric Optimization

Fusion of multi-sensor information is an important technology, which is growing exponentially due to its tremendous application potential in many areas. Effective fusion of data from sensors is very critical in increasing an intelligent system's capability to accomplish complex tasks. Appropriate fusion technologies are needed to be developed specially when a system requires redundant sensors to be used. More the redundancy in sensors, more is the computational complexity for controlling the system and more is its intelligence level. This research presents a strategy developed for multiple sensor fusion, based on geometric optimization. Each sensor's uncertainty has been modeled using classical Lagrangian optimization techniques. However, the uniqueness and effectiveness of the present technique lies on the fact that starting from the optimized value as initial estimate the accuracy of the sensory information has further been improved up to any pre defined bounded range, by developing two architectures – FFA (fission–fusion architecture) and FDD (fusion in differential domain). Sufficient evidences and analyses have been provided in the paper to show its effectiveness in various applications.     

Optimal Operation of Reservoir Systems using Simulated Annealing

A stochastic search technique, simulated annealing (SA), is used to optimize the operation of multiple reservoirs. Seminal application of annealing technique in general to multi-period, multiple-reservoir systems, along with problem representation and selection of different parameter values used in the annealing algorithm for specific cases is discussed. The search technique is improved with the help of heuristic rules, problem-specific information and concepts from the field of evolutionary algorithms. The technique is tested for application to a benchmark problem of four-reservoir system previously solved using a linear programming formulation and its ability to replicate the global optimum solution is examined. The technique is also applied to a system of four hydropower generating reservoirs in Manitoba, Canada, to derive optimal operating rules. A limited version of this problem is solved using a mixed integer nonlinear programming and results are compared with those obtained using SA. A better objective function value is obtained using simulated annealing than the value from a mixed integer non-linear programming model developed for the same problem. Results obtained from these applications suggest that simulated annealing can be used for obtaining near-optimal solutions for multi-period reservoir operation problems that are computationally intractable.     

城市建设的休克疗法——大连现象解说

在启动大规模的现代化建设的进程中，应对发展中听中型城市实施“休克疗法”，强调性终止城市发展的无序而缓慢的自然进程。选择短暂的“回归”或“中断”历史的调整时，应以能否适当地的历史文化特质从而把握当代的发展机遇为依据。     

The dynamics of daily events and well-being across cultures: When less is more.

The authors examined cultural and individual differences in the relation between daily events and daily satisfaction. In a preliminary study, they established cross-cultural equivalence of 50 daily events. In the main study, participants in the United States, Korea, and Japan completed daily surveys on the 50 events and daily satisfaction for 21 days. The multilevel random coefficient model analyses showed that (a) the within-person association between positive events and daily satisfaction was significantly stronger among Asian American, Korean, and Japanese participants than among European American participants and (b) the within-person association between positive events and daily satisfaction was significantly weaker among individuals high in global life satisfaction than among those low in global life satisfaction. The findings demonstrate a weaker effect of positive events on daily well-being among individuals and cultures high in global well-being. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

数据广播在文化传媒领域的合理化运作

数据广播是现阶段一种新的文化传媒体系,随着数字电视的不断发展完善,数据广播在信息产业飞速发展的今天,逐渐成为新时期信息传播的主要媒介方式,阐述数据广播在当今社会信息领域的存在形态、发展方向以及如何合理、高效地运营这样一种增值业务。     

施加复合电磁搅拌对A357合金微观组织的影响

在半固态加工技术中，电磁搅拌是最早应用于制备非枝晶浆料的方法之一，同时也是半固态触变压铸技术最早获得工业应用的重要技术基础之一。采用自行开发的电磁搅拌器，研究了多种不同电磁搅拌方式在不同工艺条件下，单独施加或复合施加对A357合金微观组织的影响。试验结果表明：单一施加旋转感应电磁搅拌时，浆料径向组织很不均匀；单一施加无芯感应电磁搅拌。当搅拌电流较小时，径向组织也不均匀，增大电流，浆料质量有明显改善；采用（旋转感应＋无芯感应）复合电磁场进行复合电磁搅拌时，可在电流较小时获得满意的浆料质量。