Regaining lost time: Adult aging and the effect of time restoration on recall of time-compressed speech.

Two experiments in which time was restored to artificially accelerated (time-compressed) speech are reported. Experiment I showed that although both young and older adults' recall of the speech benefited from the restoration of time, time restoration failed to boost the older adults to their baseline levels for unaltered speech. In Experiment 2, either 100% or 125% of lost time was restored by inserting pauses, either at linguistic boundaries or at random points within the passages. Experiment 2 showed that the beneficial effects of time restoration depended on where processing time was inserted, as well as how much time was restored. Results are interpreted in terms of age-related slowing in speech processing moderated by preserved linguistic knowledge and short-term conceptual memory. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

钨硅／砷化镓肖特基接触的热稳定性分析

研究了以ＷＳｉ０．６复合材料作为靶源，采用直流空溅射工艺成膜，不同退火温度下ＧａＡｓ衬底材料上ＷＳｉ０．６膜层的特性。包括ＷＳｉ０．６／ＧａＡｓ系统断面ＳＥＭ分析，ＡＥＳ界面机构分析、表面形貌分析及金属－半导体肖特基势垒特性分析，实验结果表明，在氩气压力为１３３Ｐdisplay status     

EPS系统中业务流模板研究

为了更好地保证端到端的QoS机制,为用户提供差异化服务体验,EPS系统支持通过EPS承载对分组数据进行传送。通过对业务流模板(TFT)的研究,了解UE中上行分组过滤器(UL_PF)与EPS承载的关系,研究上行IP分组包与分组过滤器(PF)的匹配过程,给出一种PF与IP分组包之间的匹配实现方案,最终实现IP数组在EPS承载上传输。     

ART1: Similarity Measures

This paper concerns with the ART1 (Adaptive Resonance Theory 1) in Neural Network. Important features of ART1 are similarity measure (criterion), vigilance parameter (), and their function to classify the input patterns. Experimental results show that the similarity measure as designed originally does not increase the number of categories with the increased value of but decreases, too. This is against the claim of stability-plasticity dilemma. A number of researchers have considered this and suggested alternative similarity measures. Here, we propose a new similarity criterion which eliminates this problem and also possesses the property of lowest list presentations needed for self stabilization of the network. We compare the results of different similarity criteria experimentally and present them in graphs. Analysis of the network under noisy environment is also carried out.     

支持并行模拟的Verilog编译技术研究与实现

并行HDL模拟是加速大型复杂的VLSI系统模拟验证的有效方法,支持并行模拟的HDL编译技术是其中的关键技术,文章提出了一种支持并行模拟的Verilog编译技术,编译器将Verilog描述转换成C＋＋代码,最后与并行模拟核心库编译链接生成可执行并行程序。文章将编译器构成,代码生成方法和并行模拟核心库,该技术已经在并行Verilog模拟器ParaVer上实现。     

一般线性粘弹性阻尼器耗能结构瞬态响应的非正交振型叠加精确解

对一般线性粘弹性阻尼器(含线性橡胶隔震支座)耗能结构的非正交振型叠加精确解法进行了系统研究。首先采用最一般的线性粘弹性阻尼器的积分型精确分析模型,用微分积分方程组实现一般粘弹性阻尼器耗能结构的时域非扩阶精确建模;然后采用传递矩阵法,直接在耗能结构原始空间上获得了一般线性粘弹性耗能变频结构在任意激励和非零初始条件下位移与速度时域瞬态响应的非正交振型叠加精确解;通过与3种典型结构的对比分析,验证了该精确解的正确性、简易性和普适性。该非扩阶精确解具有明确的物理意义,可视为现有比例粘滞阻尼定常结构的经典正交振型叠加精确解在一般线性粘弹性阻尼耗能变频结构的推广,能从本质上精确揭示耗能结构的振动机理,即尽管耗能结构的振型不具有正交性,但耗能结构响应仍然可精确分解为各振型响应的线性组合。此振动机理将为建立耗能结构精确的振型分解反应谱法提供分析路径,同时可将现有用于一般粘滞阻尼定常结构的参数识别、动力修改、最优控制及优化设计等方法推广到一般粘弹性阻尼变频非定常结构。     

多核CPU和GPU加速分子动力学模拟

在多核中央处理器(CPU)—图形处理器(GPU)异构并行体系结构上,采用OpenMP和计算统一设备架构(CUDA)编程实现了基于AMBER力场的蛋白质分子动力学模拟程序。通过合理地将程序划分为CPU单线程、CPU多线程和GPU多线程执行部分,高效地利用了计算机的处理能力。性能测试结果表明,相对于优化后的CPU串行计算,多核CPU-GPU异构并行计算模型有强大的性能优势,特别是将占整个程序执行时间90%的作用力的计算移植到GPU上执行,获得了最高可达12倍的计算加速比。     

A comparative reverse docking strategy to identify potential antineoplastic targets of tea functional components and binding mode

The main functional components of green tea, such as epigallocatechin gallate (EGCG), epigallocatechin (EGC), epicatechin gallate (ECG) and epicatechin (EC), are found to have a broad antineoplastic activity. The discovery of their targets plays an important role in revealing the antineoplastic mechanism. Therefore, to identify potential target proteins for tea polyphenols, we have taken a comparative virtual screening approach using two reverse docking systems, one based on Autodock software and the other on Tarfisdock. Two separate in silico workflows were implemented to derive a set of target proteins related to human diseases and ranked by the binding energy score. Several conventional clinically important proteins with anti-tumor effects are screened out from the PDTD protein database as the potential receptors by both procedures. To further analyze the validity of docking results, we study the binding mode of EGCG and the potential target protein Leukotriene A4 hydrolase in detail. We indicate that interactions mediated by electrostatic and hydrogen bond play a key role in ligand binding. EGCG binds to the enzyme with certain orientation and conformation that is suitable for nucleophilic attacks by several electrical residues inside the enzyme's activity cavity. This study provides useful information for studying the antitumor mechanism of tea's functional components. The comparative reverse docking strategy presented generates a tractable set of antineoplastic proteins for future experimental validation as drug targets against tumors.     

对深圳光明新区在建工地的建材质量全年监测分析

对一定区域范围的在建工地的建筑材料检测情况进行持续监测工作可以及时发现不合格材料的出现频率和波动情况,一但出现不合理的波动现象,项目参建单位和政府监督部门可以及时地进行控制,避免不合格材料和假冒伪劣材料大量用到在建工程中去,本文选取了1年期限的检测数据,对出现不合格材料较多的材料检测数据和原因进行了分析,并提出了预防意见。