可重构电解加工机床研究

电解加工机床通常是根据用户具体需求单机生产，机床研制周期长、设计重复、成本高。为此，提出采用开放式控制系统、模块化思想开发可重构电解机床，并对机床的机械部分、控制系统及通信系统进行了研究。     

Continuous electromagnetic separation of inclusion from aluminum melt using alternating current

A novel scheme about the continuous electromagnetic purification of aluminum melt was put forward based on the utilization of a square separation pipe and a 50 Hz alternating current to produce electromagnetic force. It is experimentally found that with electrical current of 400 A/cm^2, it takes only 10 s to remove 95% inclusion from aluminum melt. Comprehensive numerical simulations were carried out to investigate the dynamics mechanisms behind the process. The results show that the removal of inclusion is attributed to the cooperative effects of electromagnetic buoyancy and the secondary flow induced by the rotational electromagnetic force, and the removal efficient increases with the size of inclusion and the electrical current imposed. Theoretical predictions on the distribution and removal efficiency of inclusion were supported by the experiments.     

CVD反应器传输过程的三维数学模型

提出了一个同时表示CVD过程的气体流动、温度分布和物质传输的三维数学模型。应用这个模型预报了在含有SiCl_4的氢气流中沉积出Si的锥台式反应器中的速度场、温度场和浓度场。所得的结果有助于增进对这类反应器中的传输过程的认识,模型亦可用于设计参数的最优化,诸如入口流量,锥台倾角等。     

35 kV线路带电作业电场仿真分析与防护

35 kV线路的杆塔结构和电压等级处于配电和输电线路之间,使得带电作业人员难以选择合适的电场防护措施,为确保35 kV线路带电作业的安全开展,采用有限元法仿真计算了35 kV单、双回线路杆塔、导线表面及地电位、等电位人员体表的电场分布情况,依据人体体表电场特性和允许暴露电场的限值,提出了相应的人员防护要求。计算结果表明,作业人员在35 kV单回和双回线路直线杆上按照4种典型工况进行作业时,作业人员在作业位置处体表的电场强度均在限值以内,满足标准要求,不用穿戴带电作业屏蔽服装。研究成果为指导35 kV线路带电作业的安全开展提供了技术依据。     

COLLMANN2824轮胎检测X光机U形探测器及硬件升级

轮胎X射线检测机随着使用年限的增加,故障会逐步增多,维护费用和维护难度也在增长,特别是设备最核心的成像系统会出现电路板和传感器老化现象,使轮胎X射线图像出现模糊、区域过亮或过暗、黑条或白条(传感器整块宽度图像丢失)、竖线(传感器像素宽度图像丢失)等故障,导致检测效果变差甚至会出现检测盲区,最终出现漏检现象。     

面向配电网不停电作业装置的高性能电力电容器介质材料制备

随着配电网高可靠性作业的发展,不停电作业装置是配电网运检的必备工具之一。电力电容器是配电网不停电作业装置中配电单元、AC/DC电源变换单元等的能源储存核心单元,其高性能化、轻型化和小型化是其发展的一个关键。为制备新型高储能密度的电力电容器用介质材料,利用磁控溅射技术在Pt/Ti/SiO2/Si基底上制备Ba(Sn0.3Ti0.7)O3(BTS)薄膜,研究了不同衬底温度下BTS薄膜的结晶状况和表面形貌,对不同衬底温度条件下BTS薄膜的介电常数、击穿场强和储能密度进行分析,建立了微结构和储能性能之间的联系。研究表明:在650℃下制备的BTS薄膜具有特有的结晶状况、最大的介电常数、最高的击穿场强和储能密度。其储能密度达到19.0 J/cm3左右,是目前商用聚丙烯储能薄膜的6倍。     

全封闭大功率永磁牵引电机的温度场数值计算

为研究全封闭大功率永磁牵引电机额定工况下的稳态温度场,以一台额定功率为815 kW的永磁同步牵引电机为研究对象,依据成型绕组槽部导热模型,建立了整机三维温度场共轭传热计算模型。考虑旋转磁化、冲压过程和磁密高阶谐波对定子铁耗的影响,以及水套-定子铁心间接触热阻抗对电机温升的影响,采用Fluent软件对电机额定工况下的稳态流场与温度场求解,使用电阻法和埋置检温计法（ETD）测得电机在额定工况下绕组的平均温升、铁心测点和绕组端部测点局部温升,绝对误差分别为-3.7 K、-0.3 K和7.6 K。进一步分析了电机水路和内风路流场分布特性、水套-定子铁心间接触间隙对绕组平均温升的影响以及槽内绕组附近的温升分布情况,最后提出了该类电机冷却系统设计优化方向。     

IC卡登录监控系统

随着工业生产管理便捷性和安全性需求日益增加,IC卡登录监控系统越来越受工厂欢迎。本文介绍了实际设备中用到的IC卡登录监控系统的关键技术,涉及到C#,Delphi,数据库,以及该技术应用到工厂设备的成果。其他类似需要登录权限管理的系统,都可以参考该技术,实现IC卡登录。     

Integration of Data from Liquid–Liquid Phase Separation Databases Highlights Concentration and Dosage Sensitivity of LLPS Drivers

Liquid–liquid phase separation (LLPS) is a molecular process that leads to the formation of membraneless organelles, representing functionally specialized liquid-like cellular condensates formed by proteins and nucleic acids. Integrating the data on LLPS-associated proteins from dedicated databases revealed only modest agreement between them and yielded a high-confidence dataset of 89 human LLPS drivers. Analysis of the supporting evidence for our dataset uncovered a systematic and potentially concerning difference between protein concentrations used in a good fraction of the in vitro LLPS experiments, a key parameter that governs the phase behavior, and the proteomics-derived cellular abundance levels of the corresponding proteins. Closer scrutiny of the underlying experimental data enabled us to offer a sound rationale for this systematic difference, which draws on our current understanding of the cellular organization of the proteome and the LLPS process. In support of this rationale, we find that genes coding for our human LLPS drivers tend to be dosage-sensitive, suggesting that their cellular availability is tightly regulated to preserve their functional role in direct or indirect relation to condensate formation. Our analysis offers guideposts for increasing agreement between in vitro and in vivo studies, probing the roles of proteins in LLPS.     

基于K-距离拓扑的分布式数据存储方法

针对分布式数据存储算法通常需要较长的等待时间、且对海量数据加密时严重浪费计算资源和时间的问题,提出了一种基于K-距离拓扑的分布式数据存储方法.通过寻找K-距离拓扑子图来实现数据的安全放置,优先选择存取速度更快的节点和自身保护能力强的节点实现总体性能的提升.在Internet 2拓扑图与随机拓扑图下的仿真测试结果表明,所提出的方法能在满足安全距离约束的条件下选择到最优的数据存储节点,从而减小数据存取时间.