英国“地方发展框架”的监测机制及其借鉴意义

英国的城市规划体系在长期的发展完善过程中，逐步摸索建立了一套成熟的城市规划动态监测机制，其工作方法、技术路线、监督软件系统以及对于监管工作重点和难点的把握和处理经验，为我国建设城市规划动态监测机制系统提供了宝贵经验。本文对英国城市规划体系的新变化作了简要介绍，重点对地方发展框架的监测机制进行了分析研究，总结了英国的经验对我国正在建设的城市规划动态监测系统的借鉴意义。     

重庆菜袁路隧道模拟设计

本文论述应用平面变形条件下的模型试验结果,分析研究重庆菜袁隧道的初步设计,确定喷射混凝土和岩石锚杆的尺寸和二次衬砌的厚度,以及选择适合的施工方法。     

大厚度临氢Cr-Mo钢在辊式淬火线生产工艺的开发与应用

根据舞钢300 mm厚板辊式淬火线工艺特点,结合以往采用淬火槽生产大厚度临氢Cr-Mo钢的经验及其性能要求,对钢板成分设计和正火加速冷却过程关键工艺参数进行研究,确定了大厚度临氢Cr-Mo钢板在舞钢300 mm厚板淬火线合适的正火加速冷却工艺,成功实现了大厚度临氢Cr-Mo钢板的批量生产.检验结果表明:由300 mm厚板辊式淬火线生产的大厚度临氢Cr-Mo钢板,力学性能稳定,完全满足严格的使用要求,同时板型控制效果良好,在国内临氢压力容器制造领域得到广泛应用.     

台风“梅花”影响下近地风脉动特性研究

由建立在上海东海岸边的40m测风塔对台风"梅花"影响过程中的风速、风向等信息进行了全程记录,获得了10m、20m、30m及40m高度处的实测数据。通过对湍流度、阵风因子、峰值因子等脉动风特性参数的分析表明:当风速较低时,湍流度和阵风因子均随平均风速的增大而减小,但当平均风速超过其临界值时,湍流度和阵风因子基本不随平均风速而变化,两者的临界风速分别约为10m/s和12m/s;纵向和横向阵风因子随相应湍流度的增大而增大,并且通过最小二乘拟合得到了它们之间的经验公式;峰值因子(阵风持续时距t=3s)基本上不随10min平均风速的变化而变化,10m、20m和40m高度的各时段峰值因子的均值分别为2.21、2.12和2.00,峰值因子均值随阵风持续时距的变化关系与Durst研究结果较为吻合。     

浅谈湿法磷酸装置浓缩工序设备的吊装

随着我国化工工业的发展,磷酸的市场需求逐年增加。目前,国内大、中型化工企业新建湿法磷酸生产装置项目逐渐增多。本文对湿法磷酸装置浓缩工序中,石墨换热器、浓缩冷凝器、第一第二氟吸收器和雾沫分离器的吊装就位方法做了粗浅地探讨。     

Experimental study on the life prediction of servo motors through model-based system degradation assessment and accelerated degradation testing

The advent of smart factories has resulted in the frequent utilization of industrial robots within factories to increase production automation and efficiency. Due to the increase in the number of industrial robots, it has become more important to prevent any unexpected breakdowns of the factory. As a result, the lifespan prediction of machinery has become a crucial factor because such failures can be directly associated with factory productivity resulting in significant losses. Most of the failures occur within one of the core components of the robot arm, the servo motor, and thus we will focus on the analysis of the servo motor in this study. However, sensor attachment to such equipment is considered difficult due to the dynamic movement of the robot arm, meaning that internal instrumentation should be utilized during analysis. In addition, no definite measure to determine the degradation of the motor exists, and thus a new degradation index is proposed in this study. Therefore, in this study, the lifespan of the servo motor will be estimated through accelerated degradation testing methods based on a new system degradation assessment method, which estimates the fault of the system using observer-based residuals with encoder data obtained from internal instrumentation.     

UNI-Copter: A portable single-rotor-powered spherical unmanned aerial vehicle (UAV) with an easy-to-assemble and flexible structure

Journal of Mechanical Science and Technology - This paper presents the design and modeling of the UNI-Copter, a portable spherical unmanned aerial vehicle (UAV) that is powered by a single rotor....     

实验药包爆炸应力波测试技术探讨

用压电晶体压力传感器测定实验药包在介质中产生的爆炸应力波,没有反映冲击能（E_）和膨胀能（E_b）对介质进行加载的实际情况。本文指出电阻应变传感器具备记录压缩相和拉伸相的能力,认为超动态应变测试系统适宜于测定爆炸应力波,并给出了用该系统对爆炸应力波进行测定的结果。     

Advanced Chamfering Technology for Edge Strengthening

Damage‐free chamfering method for strengthening a glass edge was introduced and its effect on the edge property was discussed in detail. The chamfered surface was evaluated using an optical microscope, a confocal LSM, and a birefringence measurement system. The mechanical properties were characterized by measuring hardness, Young's modulus, and bending strength. The results revealed that the cut edge of 0.55t thin glass sheet containing median cracks and chips was exfoliated uniformly to a thickness of 200 μm, and a smooth edge surface was created (Ra = 0.03 μm). We also reported that the chamfered surface had a compressive stress enabling hardness and Young's modulus increase, and the edge strength improved from 117 to 199 MPa.