津滨轻轨连续箱梁快速施工技术

针对津滨轻轨施工时间紧、任务重的特点,必须研究一套科学、快速又能满足施工质量的施工方法。以此为出发点,着重介绍钢筋混凝土连续箱梁几种快速施工技术,并辅以钢箱梁的2种架设方法。     

城轨交通安全与运营效率的探讨

就城市轨道交通车站联锁系统对行车安全和运营效率的影响中的一些技术细节进行了初步探讨，提出在城市轨道交通领域为了协调行车安全和运营效率的矛盾关系，应该对传统的联锁理念、技术要求和设计验收标准有所改变与拓展，并尽快出台适合城市轨道交通实际情况的、统一和具体的信号技术要求、验收标准以及维护规范，以促进城市轨道交通的快速健康发展。     

国人切牙孔和切牙管的观察与测量

作者研究了西安地区收集的140例(男女各70例)成人颅骨切牙孔和切牙管的形态、径线以及切矛孔与周围有关结构的距离。其主要结果如后:①切牙孔近似圆形者占57.20％;椭圆形占40.10％;不规则形占2.70％。②切牙孔的矢径平均值为5.99±0.14毫米;横径平均值为5.05±0.09毫米。③切牙孔与周围有关结构的距离:前距平均值为5.14±0.18毫米;左侧距平均值为10.82±0.14亳米;右侧距平均值为10.91±0.13毫米。④切牙管之方向几乎全为直的。其长度平均值为12.17±0.28毫米。     

基于AutoCAD的参数化绘图程序设计

介绍了用Ｃ语言开发的ＡｕｔｏＣＡＤ与外部数据接口程序以及该程序目标模块库的建立。     

磷钨酸催化合成水杨酸甲酯的研究

以１２－磷钨酸做催化剂合成了水杨酸甲酯,提出了合适的催化条件。结果表明磷钨酸具有较高的催化活性和较高的催化选择性,酯化率达７０％以上。     

高效镀镍次级光亮剂HITD的电化学评估

利用旋转圆盘电极上的循环伏安溶出法研究了高效镀镍次级光亮剂ＨＩＴＤ的整平能力。结果表明，ＨＩＴＤ的整平能力明显优于丁炔二醇，与德８１－Ａ，Ｂ相比较很接近，使用电流密度对其整平能力有很大影响。     

京津城际铁路无砟轨道一次性铺设跨区间无缝线路施工技术

京津城际铁路设计为CRTSⅡ型板式无砟轨道,是我国修建的第一条时速350 km铁路客运专线,采用500 m厂焊长钢轨一次性铺设跨区间无缝线路.运输和铺设长钢轨采用WZ500型无砟轨道铺轨机组,工地焊接长钢轨和无缝线路锁定采用K922移动焊轨机,对铺设的工艺流程和施工组织进行了介绍.     

Automatic wireless power supply system to autonomous underwater vehicles by means of electromagnetic coupler

With the aim of sending electric power to autonomous underwater vehicles （AUVs）, an automatic wireless power supply system by means of electromagnetic coupler was proposed. An equivalent circuit of the electromagnetic coupler with compensating capacitors was presented to analyze the performance of the system. The magnetizing inductance and leakage inductance, which are important for choosing compensating capacitors, were calculated by finite element analysis （FEA） methods. Then the voltage gain, power loss and system efficiency were analyzed to optimize the winding turns. Finally, a phase-shift full bridge zero-voltage-switching converter and an electromagnetic coupler were produced. The experimental results demonstrated that the proposed system has a high voltage gain with small variation and sufficient power feeding.     

Research on voids deformation welding condition for manufacturing of heavy forgings

Crushing and diffusion welding are two critical healing stages of interior void defects in heavy forgings. The healing result depends on many factors during the forging process, such as stress, temperature, deformation and type of material, while the void diffusion welding condition is still not well known at the present. This paper is concerned with the deformation welding condition of the closed void interface in heavy ingot during the hot forging process. A void crushing experiment is carried out to recognize the microstructure of the closed void interface. According to the healing mechanism at high temperature, a new physical simulation model is setup to study the deformation welding process of the closed void interface based on the theory of atom diffusion and the interface contact mechanics prototype. Compared with the experimental results, the influence of deformation degree, forming temperature and holding time on the welding quality is discussed, and then the deformation welding condition of closed void interface is presented. The proposed condition helps to improve forging technology and product quality.