交流探尺的控制及其在武钢新3^#高炉上的应用

本文论述了交流探尺的控制原理及到料面信号的检测方法。以其在武钢新３＃高炉上的应用为例，给出系统组态、控制框图及它在无料钟系统中所起的补偿倾动角度的作用。最后对交流、直流探尺系统进行了比较。     

Correlation study on infrared thermography and nerve root signs in lumbar intervertebral disk herniation patient: a short report

OBJECTIVE: To determine whether infrared skin thermography is an objective measurement reflecting the seriousness of nerve root irritation in lumbar disk herniation patients. DESIGN: Quantified nerve root signs by physical examination were collected from the patients along with the infrared skin temperature measurement on the lumbosacral region and posterior part of thighs. A correlation study was applied to observe the relation between the nerve root signs and the skin temperature before a successful conservative treatment (mainly spine manipulation), and between the alteration of nerve root signs and that of skin temperature after the treatment. SETTING: Hospitalized care. PATIENTS: Twenty-seven hospitalized samples with computed tomography or magnetic resonance approval were consecutively selected during the latter half of 1990. MAIN OUTCOME MEASURE: Changes in nerve root signs. RESULTS: The temperature difference between a troubled thigh and healthy one is significantly correlated to the score of the nerve root signs before the treatment; and the reduction of temperature difference between two thighs is also significantly correlated with decreasing score of nerve root signs after the treatment. The correlation between the temperature difference on the left and right sides of the lumbosacral region and the nerve root signs before the treatment is insignificant; and the variation of the temperature difference of the same region after the treatment is not correlated with the decreasing score of the nerve root signs. CONCLUSION: Infrared skin thermography of lower extremities might be an objective sign in signaling the soothing process of the nerve root irritation in lumbar disk herniation patients, which may help a doctor in checking the responses of the patient to treatment.     

用基团贡献法预测纯物质蒸气压

对应状态原理与基团贡献法结合，提出一个新的蒸气压估算方程（ＲＬＹＭ）。通过对烷烃、烯烃、炔烃、环烷烃、环烯烃、醇、环醇、酮、醚、芳烃、酚、萘在内的１７４种有机物质蒸气压实验数据的关联，获得了３０种基团的贡献参数值。新模型的预测精度优于现有的对应状态法，并且对高碳分子仍有较好的估算精度。总的关联误差小于１．１７％。     

半连续式棒材轧机在线捆扎机及其工艺设置

由北京冶金设备制造厂设计的YSK6型钢丝捆扎机，共设有并列6台棒材捆扎车，每台捆扎车由中间收送机、成形捆扎机、液压装置、捆扎辊道和台车组合而成。按生产工艺参数要求，整个成型捆扎周期为30秒。捆扎后的棒材在成品称重时用电子秤，每称量一次均可打印出单次净值、累加值和累加次数值。     

三辊穿孔和轧管所产生的钢管壁厚极差和波浪形内螺纹

定量描述了实际生产过程中三辊斜轧穿孔所产生的钢管壁厚极差和波浪形内螺纹，初步探讨了三辊轧管机对钢管壁厚极差和波浪形内螺纹的影响。     

Use of Explosives on The Moon

The utilization of explosives for excavation on the lunar surface is under serious consideration as a part of the design for construction of temporary and permanent bases. An excavation research program has shown that small‐scale explosives blasting in a lunar‐soil simulant will greatly reduce the digging forces required for scoop and dragline excavators. Some crater‐blasting parameters were determined for the lunar soil simulant at one Earth gravity and at 10 Earth gravities using a centrifuge. The size of the craters produced at 10 Earth gs matched those formed at one earth g by scaling according to the weight of the explosive. These data can be applied to explosive‐excavation problems such as habitat construction, burial of nuclear power sources, and the rapid construction of shelters remote from the main base to shield against solar‐flare activity.     

微机控制托辊管筒加工机床的设计

介绍了一种生产效率高、加工质量稳定、利用单片机控制液压传动系列带式输送机托辊管筒自动加工机床的设计过程。     

乌江渡水电站扩建工程开挖爆破对原水电站建筑物震动影响的控制研究

为确保原有的乌江渡水电站水工建筑物和发电设备以及扩建工程建筑物的施工安全,加快扩建工程施工进度,本扩建工程施工中对关键部位开挖所产生的爆破震动影响实施全面而有效的实时爆破监控,并根据监控成果的研究指导开挖爆破作业,以确定符合实际的安全爆破震动参数。     

电力市场仿真和培训系统的设计及实现

介绍了电力市场仿真和培训系统（PMSTS）的设计及实现。该系统基于 Net Framework框架结构，建立在统一的底层数据库之上，采用模块化结构体系、可视化图形界面，由教员台（客户/服务器结构）、学员台（浏览器/服务器结构）2部分组成，可以仿真不同电力网络在不同市场交易规则下的运行过程，达到培训、指导电力市场参与者的目标，并且对电力市场机制的设计和评估具有重要的理论参考价值。立足于电力市场运作的仿真和培训，该系统可以检验电力市场决策方案的合理性和有效性，能够帮助广大电力系统专业的学生及专业人员理解、熟悉电力交易机制，掌握市场规律。通过IEEE 30节点系统的算例，验证了该系统的有效性和实用性。