一种新结构的DM-multipath与动态负载平衡

对于存储设备,Linux 在多路径 I/O方面主要有两种类型的解决方案：位于I/O调度器之上的顶层方案(BIO映射器)和位于底层的子系统具体方案(如IDE,SCSI)。因为实施它们的所在存储堆栈中的位置不同,每种方案各有优势。通过与第一种方案比较,介绍具体硬件子系统之上的另一种解决方案,新结构中重点实现移动内核当前多路径层——多路径设备映射器 (dm-multipath)到I/O调度层之下,这种方案能够有效地支持动态的负载平衡。     

化工设备故障诊断仿真模型设计及计算分析

通过化工设备的结构模型、功能模型建立仿真模型,在对仿真模型分析的基础上得到症状与故障之间的数量关系并进行分析计算,推断出潜在的故障模式,为设计化工设备故障诊断专家系统奠定基础。     

A method for rapidly assessing and refining simple solvent treatments in molecular modelling. Example studies on the antigen-combining loop H2 from FAB fragment McPC603

Different simple solvent models have been implemented in anextended simulated annealing process (ESAP), developed by Higoet al. [(1992) Biopolymers, 32, 33–43] and proven to beable to predict ab initio the conformation of the antigen-combiningloop H2 from FAB McPC603. Hie rationale used here provides auseful new method for testing solvent models in general. Thedifferent solvent models comprise a high dielectric constant,a screened coulomb potential, a dummy water model and a statisticalcontinuum treatment of the solvent effect in which the reactionfield and the solvent accessible area is accounted for. To assessthe effect of the solvent, we tested the ability of simulationsto retain the experimental conformation of loop H2. We comparedthe different structures obtained at the end of the annealingprocess in terms of root mean square deviation (r.m.s.d.), forboth the backbone and for all atoms, root mean square (r.m.s.)fluctuation, solvent accessible surface area (ASA), hydrogenbonding network and - plot distribution. The relationship betweenthe r.m.s.d. and the internal energy of a structure is alsoevaluated in terms of precision and another possible methodfor obtaining the best conformation is discussed. The accuracyof modelling the coarse effect of the solvent and the similaritiesof the resulting structures with respect to the X-ray referencestructure are examined. The possible choice of one of thesesolvent models in the structure determination of an unknownloop structure is discussed     

Tariff reduction as a tool to increase the efficiency of electricity distributors: A case study in southern Brazil

The article aims to evaluate the consumer response to a reduction in the electricity tariffs as a hourly economic signal for the case of an electric utility in the state of Rio Grande do Sul, southern Brazil. Using Differences-in-differences method, the results were robust in showing that the change in the economic signal increased up to 81.01% the consumption at the time influenced by the change, improving the way in which the company's assets are used, in addition to reducing fuel oil consumption by users.     

基于AEM法的爆破拆除倒塌过程的数值模拟

利用应用单元法(AEM法),以含填充墙的某多层框架结构定向爆破拆除为例,进行倒塌过程的数值模拟。结果表明:在框架结构爆破切口形成后,结构由于重力作用逐渐沿横向偏转,并在横向最外侧的一排柱上形成活动铰,产生翻转倒塌,模拟结果与实际倒塌结果基本相符。在倒塌的过程中,结构爆破切口的横向很快进入大变形倒塌,同时引起横向隔墙的平面失去稳定而倒塌。落地的倒塌碎块,在纵向产生150kN左右的峰值冲击力,在横向产生30~50kN的峰值冲击力。基于仿真结果,可以定量设置防护措施,避免安全隐患。     

论株洲产业结构的调整与优化

从株洲产业结构的现状与特征出发,对如何进一步调整优化株洲的产业结构进行了探讨,提出了调整优化的产业结构的基本方针和对策。     

构建信息对抗专业的知识体系和实践教学体系

针对我校信息对抗技术专业的发展方向和培养定位,结合我校办学特色,提出该专业的知识体系和实践教学体系。通过对当前现状和存在问题的分析,研究探讨符合实际的专业教学和人才培养模式。     

SZ绞成缆设备电控系统的构成及变频器故障分析

SZ绞设备是将单元绞制和缆芯绞制在一道工序完成的一种专业电缆生产设备。SZ绞设备采用了先进的变频调速技术和PLC控制技术,有的还采用了伺服驱动,使其控制快速、精确和可靠。本文就SZ绞设备的电控系统构成及在调试运行中遇到的变频器故障进行了分析。     

一种新型的加固计算机箱设计

介绍了一种新型加固计算机机箱,其独特的双层箱体结构,使它适合在各种复杂恶劣的环境条件下使用。通过设计实践,阐述了该箱体的结构特点和密封、隔振缓冲、电磁兼容等方面的具体解决方法,特别是箱体成型和综合热设计等关键技术。经环境试验和工程实际应用的检验,证明其具有较好的综合防护性能。     

双边开关磁阻直线电动机的设计

介绍了双边开关磁阻直线电动机(LSRM)的组成、工作原理及其尺寸设计方法,给出了LSRM样机的尺寸设计结果,并采用有限元法分析LSRM磁场分布规律,进行磁场分段计算,从而得到了最大电感、最小电感和相绕组匝数。测试结果表明,该LSRM样机启动力较大且出力不受电流方向影响,但也存在出力有脉动和噪声较大等问题,该问题可通过优化结构设计和控制算法解决。