水力自动翻板闸门的瞬心轨迹及其对稳定性的影响

分析了连杆滚轮式水力自动翻板闸门的运动轨迹，并由此得出闸门动、静坐标系间的转换关系．结合翻板闸门的运转机理，探讨了闸门在运行过程中的瞬心轨迹线及其对闸门稳定性的影响．结果表明，通过优化闸门结构可调整“瞬心”的位置，保证闸门运转的稳定性．     

A Composite Index of Compliance for Chronic In‐Center Hemodialysis Patients

We developed a composite compliance index as the sum of the compliance scores for interdialytic weight gain (IDWG), pre‐dialysis serum potassium and phosphorus concentrations (each scored from zero to 3, with 3 indicating the poorest compliance), and skipping hemodialysis sessions (scored from zero to 9, with 9 indicating the poorest compliance). We used this composite score to prospectively evaluate compliance in 25 prevalent hemodialysis patients over a period of 1 year. We then followed these patients for another 3.5 years. The patients studied were divided into two groups: group A (poor compliance) consisted of 9 subjects with composite score ≥ 9 (13.2 ± 3.2); group B (better compliance) consisted of 16 subjects with composite score < 9 (4.7 ± 1.8). Age, duration of hemodialysis, and frequency of diabetes mellitus did not differ between the groups. Group A contained higher fractions of subjects with history of alcoholism (66.7% vs 12.5%, p = 0.010), other substance addiction (44.4% vs 0%, p = 0.010), and severe psychosocial problems (88.9% vs 18.8%, p = 0.002). Mean survival from the beginning of observation, estimated by actuarial life‐table survival analysis, was 1.19 years in group A and 2.60 years in group B (p = 0.0265). A composite compliance index incorporating domains indicating adherence to diet, medications, and dialysis schedule identified other behavioral problems in poorly compliant patients. Hemodialysis patients characterized by this composite index as poorly compliant had shortened survival.     

同杆并架双回线基于电流突变量的综合选相

相电流差突变量选相元件在单回线故障中具有良好的选相性能，但在同杆双回线跨线故障中可能误选相。利用六序故障分量的分析方法，分析了相电流突变量在同杆双回线跨线故障中的幅值和相位特征，给出了其相位比相方程。在此基础上，提出了一种运用测量阻抗和方向元件相结合的综合选相方法，并给出了选相流程图。仿真结果表明，在双回线简单故障和跨线故障时，基于单回线单端电气量的同杆并架双回线综合选相方法具有较理想的选相性能。     

Hardware and software architecture for power quality analysis

This paper presents a novel concept for power quality hardware and software architecture. Software tools related to detection, classification and characterization of power quality events can be integrated into a Distribution Control Center in which the interconnection between different subsystems is being carried out through the Internet allowing flexibility to the system. This system is implemented using wavelet analysis applied in all proposed algorithms. Different power quality events are taken as examples to illustrate the capabilities of the proposed method. The obtained results reveal that the proposed architecture is feasible to be implemented as an integral part of a control center system.The proposed system has the property of fast and accurate detection and classification of any power quality disturbance event and introduces a new PQ index determination that allows characterizing any type of disturbance including the non-periodic signals.     

自复中调速器在高水头高转速机组上的应用

简要介绍了自复中电/机调速器的机械和电气原理，并就使用该调速器的机组在生产运行中容易出现的停机后导叶开度漂移、停机时导叶不能完全关闭和显示开度与实际开度不一致等主要问题，通过修改可编程逻辑控制器（PLC）程序、调节调零杆位置、修改PLC程序参数等方法进行解决，这些方法对同类水电厂处理类似问题有借鉴作用。     

Research and Design of Network Management Construction Based on Mobile AGENT

The technical characters of mobile agent （MA） originated in the distributional artificial intelligence domain is introduced. A network management construction based on agent （NMCA） is then proposed. The NMCA structure features are elaborated in detail. A prototype design of NMCA is given by using the jKQML programming. The establishment of NMCA platform will be helpful to reduce the correspondence load of network management and improves the efficiency and the expansion ability of network management systems.     

化学成分和固溶温度对1Cr17Mn9Ni4N不锈钢组织和性能的影响

为提高1Crl7Mn9Ni4N钢固溶处理后的力学性能(特别是钢的强度)，研究了化学成分及固溶处理温度对其组织和性能的影响。结果表明，1000—1125℃固溶处理后，该钢的组织为单相奥氏体。在标准成分范围内，随着镍、锰含量的增加，该钢的强度降低，塑性有所改善。氮明显提高该钢的强度。根据试验结果，每增加0．01％的氮钢的室温强度可提高大约5MPa，且塑性基本上不受影响。当合金成分(质量分数，％)控制在C0．08—0．12、Crl6．5—17．5、Ni3．5—4．2、Mn8．0—9．0、N0．22—0．28时，1Crl7Mn9Ni4N钢经1050—1100℃固溶处理后强度较高、塑性好，室温强度σ0．2和σb可分别达到400MPa和800MPa。     

道路与匝道中线自动绘制的算法与实现

道路与立交匝道平面中线的计算机自动绘制是道路路线CAD软件的核心功能之一,在道路工程计算机动态交互式设计、计算机辅助成图方面具有基础性作用.依据道路中线线形的曲率变化特点,推导了道路中线坐标计算的通用数学模型,并根据一个工程实例在通用图形系统AutoCAD环境下实现了道路与匝道中线的自动绘制.     

唐钢ER70S-6焊丝钢的生产工艺研究及质量分析

介绍了唐钢ER70S-6焊丝钢的特点，对盘条质量进行了分析。对该钢化学成分、冶炼和轧制工艺进行了优化研究，使其综合性能明显改善。