一个带有时限的工程设计事务提交协议

通过分析协作设计活动的特点,给出了一个协作设计事务模型,并在此基础上提出了一个带有时限的工程设计事务两阶段提交协议,包括协议描述及故障处理。分析表明,带有时限的工程设计事务提交协议的性能在所有情况下优于基本两阶段提交协议。     

峨眉山玄武岩岸坡深部差异风化岩体特征及成因

西南地区某水电工程的峨眉山玄武岩,其岩体风化具有特殊性,存在岸坡内部（或深部）岩体风化局部加强的特殊现象（称为差异风化）。该差异风化岩体在表观特征、分布特征、化学特征及形成环境上具有与岸坡表部一般风化岩体不同的显著特征。以该处差异风化岩体发育分布规律为基础,结合其化学特征、河谷演化过程及浅生改造理论分析其成因机制。研究表明：差异风化不具随水平深度增大风化逐渐减弱特征,分布受长大张性结构面控制,表现为局部的裂隙式风化加剧,张性结构面两侧 5 ～ 15 cm 范围内岩体红度增加;差异风化岩体发生了化学风化,但并未发生明显的脱硅富铝与盐类淋失迁移,仅表现为二价铁减少、三价铁富集;控制性结构面具浅生改造特征,差异风化岩体赋存于浅生结构所形成的相对封闭空间;浅生改造正是导致差异风化岩体形成的根本原因。     

网络编码在无线通信网络中的应用

网络编码是一种可以逼近网络容量传输理论极限的有效方法,在无线网络环境。中有着广泛的应用前景。在无线中继网络中采用网络编码技术,可以使中继节点同时为多个用户转发数据,从而获得较高的转发效率。网络编码在无线中继网络中的典型应用方案包括噪声中继采用置信传播算法实现网络编码,复数域网络编码算法以及信道编码和网络编码联合设计方法,它们均可在获得较高网络吞吐量的同时实现完全分集。在多用户协作通信网络中采用网络编码技术,可获得更高的分集增益以及更低的符号错误概率。     

Optimal resource allocation scheme for cognitive radio networks with relay selection based on game theory

In this paper,we present a non-transferable utility coalition graph game(NTU-CGG) based resource allocation scheme with relay selection for a downlink orthogonal frequency division multiplexing(OFDMA) based cognitive radio networks to maximize both system throughput and system fairness.In this algorithm,with the assistance of others SUs,SUs with less available channels to improve their throughput and fairness by forming a directed tree graph according to spectrum availability and traffic demands of SUs.So this scheme can effectively exploit both space and frequency diversity of the system.Performance results show that,NTU-CGG significantly improves system fairness level while not reducing the throughput comparing with other existing algorithms.     

某桁架结构与地基基础共同作用分析

针对某些情况下，地基变形会对结构内力产生较大影响的情况，通过对某一桁架结构的分析表明，在地基变形较不均匀时，忽略结构与地基基础共同作用会导致结构不安全，以指导相关设计人员注意这一影响。     

测试技术在现代油藏管理中的作用

面对现代油藏管理提出的新挑战，充分运用现代化的科学技术来认识油藏和经营油田十 分必要。本文从测试资料能够解决的油藏描述问题入手，论述了测试技术在现代油藏管理中的重要 地位和作用。     

复合注浆法加固桩基础作用机理研究

简要说明了复合注浆法的定义与特点,重点对复合注浆法加固桩基础的作用机理进行深入分析,可知一是浆液对土体的喷射破坏作用及浆液与土的搅拌置换固结作用形成一定直径的旋喷桩,二是渗透、劈裂、挤密作用扩大浆液扩散范围,对成桩以外的土体进行有效的加固,从而达到更佳的加固效果;也使工程技术人员理解复合注浆法能充分发挥两种注浆方法的优点,克服各自的技术和工艺缺陷,使桩基础加固的成功率得到提高,对相关工程设计及施工提供借鉴。     

Deceived and distorted: Game outcome retrospectively determines the reported time of action.

Previous work suggested the association between intentionality and the reported time of action was exclusive, with intentionality as the primary facilitator to the mental time compression between the reported time of action and its effect (Haggard, Clark, & Kalogeras, 2002). In three experiments, we examined whether mental time compression could also be observed in an unintended action. Participants performed an externally cued key press task that elicited one of two possible tones. The reported time of action shifted closer to the tone when the tone was used to indicate the winner of a race (Exp.2) compared to when the tone was meaningless and did not indicate winning (Exp.1). This suggests that reported time of an unintended action could shift toward the effect in some contexts. Furthermore, the results from Exp.2 and Exp.3 (tones were substituted with verbal feedback) showed that a presumed winning action was judged to occur earlier whereas a presumed losing action was judged to be later. These findings therefore support the view that the reported time of action is reconstructed from known temporal information rather than determined by intentionality. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

群作用轨道及其应用

运用群作用与同态刻划了群作用之轨道，轨道数与群阶数之间的关系，群与它可迁作用正规子群共轭子群之关系及其作用。     

Nodal Failure Index Approach to Groundwater Remediation Design

Computer simulations often are used to design and to optimize groundwater remediation systems. We present a new computationally efficient approach that calculates the reliability of remedial design at every location in a model domain with a single simulation. The estimated reliability and other model information are used to select a best remedial option for given site conditions, conceptual model, and available data. To evaluate design performance, we introduce the nodal failure index (NFI) to determine the number of nodal locations at which the probability of success is below the design requirement. The strength of the NFI approach is that selected areas of interest can be specified for analysis and the best remedial design determined for this target region. An example application of the NFI approach using a hypothetical model shows how the spatial distribution of reliability can be used for a decision support system in groundwater remediation design.