中国煤炭回采率低下的原因及对策

针对中国煤炭回采率水平低下,煤炭资源的浪费的问题,介绍了中国煤炭回采率现状,从煤炭行业结构、监管制度等方面,分析了导致中国煤炭回采率低下的原因;从勘探、采区设计、采煤工艺、现场管理、回采率考核、提高员工素质等方面,分析并归纳出中国煤炭回采率落后的原因,并提出了应对策略。     

客车内饰设计

文章介绍了客车内饰的构成、材料及工艺的选择以及一些经验技巧，确保客车内饰能提供安全性与舒适性，且尽量做到人性化设计，让人赏心悦目。     

成本法下长期股权投资核算之浅见

文章对于采用成本法对长期股权投资进行会计核算时,被投资企业宣告发放现金股利,特别是对于投资企业投资年度以后被投资企业宣告分派现金股利时,投资企业应如何确定投资收益和应冲减的初始投资成本.     

Advancements in organic nonvolatile memory devices

As one of the most promising candidates for next generation storage media, organic memory devices have aroused worldwide research interest in both academia and industry. In recent years, organic memories have experienced rapid progress. We review the development of organic resistive switching memories in terms of structure, characteristics, materials used, and integration. Some basic concepts are discussed, as well as the obstacles hindering the development and possible commercialization of organic memory d...     

打破内容的局限性——中国高考改革的新构想

高考制度改革应是内容改革,构建中学生综合知识考试与中学生学业考试相结合的新高考制度,可以实现在保证公平、公正前提下,克服、改善现制度下的种种弊端。     

Genetic approach for Cell-by-Cell dynamic spectrum allocation in the heterogeneous scenario

<正> In this paper,a genetic algorithm (GA) is investigated to deal with cell-by-cell dynamic spectrumallocation (DSA) in the heterogeneous scenario with temporal and spatial traffic demand changes,whichis also known as a difficult combinatorial optimization problem.A new two-dimensional chromosome encodingscheme is defined according to characteristics of the heterogeneous scenario,which prevents forminginvalid solutions during the genetic operation and enables much faster convergence.A novel randomcoloring gene generation function is presented which is the basic operation for initialization and mutationin the genetic algorithm.Simulative comparison demonstrates that the proposed GA-based cell-by-cellDSA outperforms the conventional contiguous DSA scheme both in terms of spectral efficiency gain andquality of service (QoS) satisfaction.     

虚拟企业中的信任机制研究

虚拟企业内的信任问题是联盟取得成功的最重要的环节,大量虚拟企业的失败都可以归结为互相信任问题。本文探讨和剖析了虚拟企业内部成员企业在组建和运转过程中的相互信任问题,并提出了建立相互信任机制的各种有效措施。     

Three-step iterations for nonexpansive mappings and inverse-strongly monotone mappings

This paper introduces a three-step iteration for finding a common element of the set of fixed points of a nonexpansive mapping and the set of solutions of the variational inequality for an inverse-strongly monotone mapping by viscosity approximation methods in a Hilbert space. The authors show that the iterative sequence converges strongly to a common element of the two sets, which solves some variational inequality. Subsequently, the authors consider the problem of finding a common fixed point of a nonexpansive mapping and a strictly pseudo-contractive mapping and the problem of finding a common element of the set of fixed points of a nonexpansive mapping and the set of zeros of an inverse-strongly monotone mapping. The results obtained in this paper extend and improve the corresponding results announced by Nakajo, Takahashi, and Toyoda. This research is supported by the National Natural Science Foundation of China under Grant No. 10771050.     

全球化对我国法律人才培养模式与方法的影响

全球化泛指多领域间的更多联系、破除疆域、协调合作,其中包括法律的全球化。我国现有的法律人才培养模式与教学方法要积极主动地适应法律全球化的需要,一是要加强培养高端精英型法律人才,主动参与法律全球化进程,争取全球治理下的中国自主性与话语权;二是要完善各层次应用型法律人才的培养目标和方案,更好地服务于转型期依法治国的需求;三是要更新法学教学手段,强化法学教学方法的实践性,从而增强法律领域的国际竞争力。     

H+-ATPase in the plasma membrane of Arabidopsis pollen cells is involved in extracellular calmodulin-promoted pollen germination

-activated Ca2+ channel in the PM of A.thaliana pollen cells.