工作站网络下三对角方程组并行求解

考虑工作站网络（ＮＯＷｓ）中三对角线性方程组的并行求解，基于最小秩解耦算法与分布治之并行计算模式，并行最小秩解耦算法（ＰＭＲＤ）。它在计算过程中保持原矩阵的结构特征，数值稳定性高，本文给出算法的数值特征分析以及计算与通讯复杂性分析并与Ｍｅｈｒｍａｎｎ分治算比较，所有算法由ＰＶＭ软件系统实现并在工作站网络中测试。     

科研设计院所自建产业园的工业品众筹模式研究

探讨了转制的科研设计院所自建产业园的特征、创业模式和成功的必要因素,论述了"工业品众筹"是一种可以打通产研循环的新手段,科研设计院所的自建产业园是"工业品众筹"的优良平台,描述了"工业品众筹"的流程设计,并作了实例设想。     

Roles of Voltage-Gated Tetrodotoxin-Sensitive Sodium Channels NaV1.3 and NaV1.7 in Diabetes and Painful Diabetic Neuropathy

Diabetes mellitus (DM) is a common chronic medical problem worldwide; one of its complications is painful peripheral neuropathy, which can substantially erode quality of life and increase the cost of management. Despite its clinical importance, the pathogenesis of painful diabetic neuropathy (PDN) is complex and incompletely understood. Voltage-gated sodium channels (VGSCs) link many physiological processes to electrical activity by controlling action potentials in all types of excitable cells. Two isoforms of VGSCs, Na_V1.3 and Na_V1.7, which are encoded by the sodium voltage-gated channel alpha subunit 3 and 9 (Scn3A and Scn9A) genes, respectively, have been identified in both peripheral nociceptive neurons of dorsal root ganglion (DRG) and pancreatic islet cells. Recent advances in our understanding of tetrodotoxin-sensitive (TTX-S) sodium channels Na_V1.3 and Na_V1.7 lead to the rational doubt about the cause–effect relation between diabetes and painful neuropathy. In this review, we summarize the roles of Na_V1.3 and Na_V1.7 in islet cells and DRG neurons, discuss the link between DM and painful neuropathy, and present a model, which may provide a starting point for further studies aimed at identifying the mechanisms underlying diabetes and painful neuropathy.     

浅谈钛材换热器的管板焊接

在氧化性、中性及含氯离子的介质中,钛的耐腐蚀性能均优于普通不锈钢和铝等。但钛材的焊接性能不好,焊接时极易产生氧化、氮化和脆化等缺陷。根据钛材的焊接特性,在焊接过程中有针对性地采取合理的保护措施,制定合适的焊接工艺,严格把好各个施工环节质量关,就能保证钛材的焊接质量。     

Visualization analysis of heart diseases using two‐dimensional electrocardiogram sequences

During the last years, there have been large advances in the understanding of cardiac mechanics, and in particular shape, motion and deformation. However, it is important to comprehend how these features interrelate and how they can be interpreted to refine the clinical diagnosis. The goal of our study is to illustrate the use of two‐dimensional ultrasound cardiac motion sequences on some typical cardiac pathologies. The method is applied to preprocessed data from two‐dimensional ultrasound sequences of four different subjects, namely, two healthy volunteers, one patient with left ventricular mechanical dyssynchrony from the left bundle branch block, and one patient with hypertrophic cardiomyopathy. The interpretation based on these features is corroborated with other analyzing techniques such as electrocardiogram and visual interpretation by experienced clinical observers. The proposed method realizes a computer program, which allows the user to easily obtain and visualize information about myocardial shape, motion (displacement and velocity), and deformation (strain) along the left ventricle myocardium wall during the cardiac cycle.     

关于科研设计院所的专业科室开展自主经营的一些思考

探讨了在"生产资源按专业集中配置"的组织模式下,科研设计院所下属专业科室的生存状态、和以科室为单位的自主经营策略。     

梯级水电站短期发电优化调度的免疫蛙跳算法应用研究

针对传统优化方法在求解高维、复杂的梯级水电站短期发电优化调度时易出现"维数灾"或陷入局部最优解的缺陷,提出了免疫蛙跳算法(ISFLA)。ISFLA将克隆选择算法嵌入到混洗蛙跳算法框架中,对混合之后的蛙群构造子群体执行免疫克隆选择操作,同时使用改进的最差解更新方式以提高其局部搜索能力,进而将其应用于某梯级水电站短期发电优化调度中。通过将ISFLA与标准混洗蛙跳算法、粒子群算法以及逐步优化方法对比,优化结果表明ISFLA在求解梯级水电站短期发电优化问题时具有有效性和优越性。     

直接空冷单元空气流场优化

直接空冷系统空冷单元空气流场具有明显的旋转上升特点,且呈中心对称分布,使空冷单元翅片管束的冷却空气流量分配极不均匀,翅片管束传热面利用效率低,空冷凝汽器流动传热性能差。对此,利用CFD软件,对直接空冷单元内部的空气动力学特性进行研究,发现,由于风机出口流通面积的突变,在空冷单元底部形成了流动死区和涡流,在单元中心形成了严重的回流,导致流动阻力增加,阻碍了风机出口冷却空气向翅片管束方向的顺利流动。为此,提出4种导流方案,对4种导流方案的空冷单元热力性能进行研究。结果表明,经过空冷单元内冷却空气导流后,空气流场得到优化,管束表面流量和温度场更为均匀,空冷单元流动传热性能得到了改善。4种导流方案中,方案3的效果最为显著。     

微型步进马达总工程自动组装工艺研究与产业化应用

目前市场中多数企业的微型步进总工程组装作业都是手动完成,整体效率较低,又因工人离职造成产品品质不稳定,为此专门设计了微型步进马达总工程自动组装线.结合现阶段的先进工业技术,采用回转式轮带、振动盘分离区分进料、多机构精密并联、可编程三菱PLC及威纶人机界面触摸屏研发了此自动组装设备.该设备解决了微型步进马达因工人不足而导致产能降低和品质问题多发等问题,减少了企业成本,提升生产效率及产品品质.     

伺服马达性能全自动检测设备设计

随着科技的进步,智能时代不断延伸到各行各业,伺服马达性能检测设备由于分段化,造成测试效率低下及人工成本较高.从降低成本及提升效率方面,运用现阶段先进工业技术,通过专用检测软件对伺服马达性能进行全自动化检测,综合运用把检测设备阻抗计、耐压计、感抗计统一兼容合并化,解决了因人工不足导致产能减少及人员频繁交换导致产品品质发生隐患等问题,减少企业投入运营成本,提升了产品品质.