Optimal timeslot and channel allocation considering fairness for multicell CDMA/TDD systems

The CDMA/TDD system is a highly attractive solution to support the next generation cellular mobile systems which provide unbalanced multimedia services between downlink and uplink. In this paper, we analyze the interference for downlink and uplink timeslots in a multicell CDMA/TDD system. We also mathematically formulate an optimal timeslot and channel allocation problem considering capacity fairness among cells, which is to maximize the system capacity under the given traffic unbalance, and propose an efficient algorithm based on the simulated annealing technique. Extensive experimental results show that the proposed scheme yields a good performance, and fairness among cells improves with a decrease in the system capacity.     

An Investigation of Passivatior of Cerium for Red Copper

The paperis studied and probed into the cerium application in the passivators of red copper. Through the experimentation of single factor we knoew that ithas remarkable quality influence among red copper passivators by Ce3 , determined that there is obvious function in its small content. And we educed a best technology through the orthogonal test. Research shows: there are obvious changes in the molecular structure of the passivating films after adding the Ce compounds and anticorrosive performance is improved.     

AFA3G定位格架条带技术研究

介绍了目前国外燃料组件高燃耗、长周期、低泄漏的发展方向;阐述了研制高燃耗燃料组件定位格架的必要性和可行性。提出了定位格架研究中的主要技术指标、研究方案和实施途径。明确了定位格架条带的研制内容和模具制造中的技术难点;给出了总体实施方案,并确定了研究目标及技术性能指标。最后对格架研制中的关键技术和实施方案及格架研制中的相关配套条件进行了分析。     

一种容量最大化的OFDMA资源分配算法

针对功率受限的多用户OFDMA系统,提出了一种简化的子载波和功率分配算法,此算法在最大化系统容量的同时兼顾了用户间的公平性。算法首先依据当前的信道状况计算出各用户所需的载波数量,并分配子载波,然后以注水算法对各载波上的功率进行分配。仿真结果表明,以此算法对OFDMA的系统资源进行分配可显著提高系统的多项性能。     

Research Validation: Challenges and Opportunities in the Construction Domain

Validation of the research methodology and its results is a fundamental element of the process of scholarly endeavor. Approaches used for construction engineering and management research have included experiments, surveys and observational studies, modeling and simulation, theory building, case studies, and various subtypes thereof. Some studies use more than one approach. A particular contribution of this paper is that it reviews different types of validation using examples of studies, analyzes the specific challenges that were found to be significant, and presents how they were successfully overcome in each case. Another contribution is that it describes new opportunities for research validation that are emerging at the horizon as well as ongoing collaborative efforts to enhance the access of construction researchers to validation tools. This paper increases the awareness of the paramount role that validation techniques play in scholarly work by providing readers with recommendations to properly validate their own research efforts.     

试论高校贯标认证工作

根据当前经济发展的特点和“科教兴国”的基本国策和高校肩负的任务,分析了高校加强质量管理,开展贯彻ＩＳＯ９０００族标准并申请认证工作的必要性。结合高校的特点,提出了贯标认证必须做好组织落实、全员培训、编好文件、认真宣贯落实四项主要工作。     

CARR堆主控室通风空调及空气净化系统设计

介绍了CARR堆主控室可居留性空调系统功能、运行工况和系统设置,并对主控室空调冷负荷计算进行了分析。结果表明,该空调系统既能满足正常工况下主控室内温度及湿度的要求,又能满足事故工况下主控室操作人员可居留性的要求。     

钢液二次精炼用CaO基熔剂的脱磷能力

根据CaO基熔渣和钢液之间在1853K脱磷平衡实验结果，利用CaO-Fe2O3-CaF2和CaO-BaO-Fe2O3-CaF2熔剂对钢液进行二次精炼脱磷试验，试验发现，采用优化组成的CaO基熔剂，可得到大于90%的脱磷率，能将钢液磷含量从0.05%降低到0.005%以下。     

上海历史文化风貌区研究综述——基于CiteSpace的文献计量分析

对上海历史文化风貌区保护领域相关研究文献进行梳理与分析,了解目前上海历史文化风貌区的研究发展趋势。通过CiteSpace文献分析软件,对知网CNKI中上海历史文化风貌区的相关研究文献数据进行了分析,为后续研究提供一定的参考和借鉴。由于新的发展需求、信息技术的创新和环境资源的紧张,上海市对于历史文化风貌区的保护方向已经由"历史风貌保护"转向城市更新发展下具有整体性框架的"城市遗产保护",同时也改变了对空间的需求。人居环境研究、空间使用功能变更,以及计算机技术在历史建筑保护中的运用等是下一阶段需要重点研究的方向。     

无铅低温乳浊釉研究现状与展望

近年来,由于国家绿色环保政策的日益严苛,陶瓷行业的节能减排成为重要的研究课题.可用于建筑卫生陶瓷及低品位原料日用陶瓷坯体的乳浊釉,尤其是无铅低温乳浊釉的研究越来越受到重视,同时也取得了一些研究结果.本文综述了无铅低温乳浊釉乳浊机理,介绍了其分类和研究现状,并分析了当前无铅低温乳浊釉存在的问题,指出其未来的主要研究方向.