Application of Code Approach for Emergency Evacuation in a Rail Station

This paper presents an emergency evacuation analysis during a mid-platform train fire in an underground rail station. A time-based evacuation scenario is developed taking into account the stairway inaccessibility due to smoke blockage. The calculation approach in NFPA 130 is then applied to a parametric study of this time-based scenario and its reliability is examined using a micro-simulation model. Both methods give consistent predictions of the exiting times. The results demonstrate that with the division of the station into two zones, the exiting time could not meet the code requirements, whereas it does meet the required exiting time without the division. Such division is due to smoke blockage and creates an uneven ratio of the occupant load to the available exiting capacity. This shows that appropriate consideration of the fire and smoke effects is important for station egress evaluation. Other issues such as the fire growth rate and the pre-evacuation time are also discussed.     

输气干线单个分输站站址最优化研究

输气干线分输站站址规划设计合理与否，直接影响到分输站至各城市门站之间输气管线总投资和未来管网系统的发展。为此,着重讨论并建立了以分输站站址、各城市门站与分输站之间管道直径、壁厚、分输站压力为设计变量，以各城市门站与分输站之间管道投资最小为目标函数的分输站站址优化数学模型。根据模型特点，采用混合离散变量复合形法与数据库技术相结合来求解分输站站址。以此站址为参考点，结合现场勘察，在参考点附近沿输气干线预选多个分输站站址，并对影响分输站建设和管理的环境因素用多目标模糊评价方法进行综合评价，以评价效果好的站址为最优分输站站址。用算例说明了分输站站址优化结果不仅与工艺参数变化有关，且与分输站所处环境因素有关。提出还应深入研究输气干线中具有多个分输站的站址优化问题。     

Y-Ba-Cu-O超导涂层的研制

用等离子喷涂工艺制备了 Y-Ba-Cu-O 高临界温度超导涂层,涂层的初始转变温度为101K、零电阻温度为86K。电阻率与磁化率的测量结果表明这种超导涂层具有与烧结超导块体相类似的性能,X 光衍射谱显示出涂层主要由 YBa_2Cu_3O_(?)单相化合物组成。     

测量机器人GeoCOM接口技术的开发与应用

介绍了测量机器人(TCA2003全站仪)的一些强大功能,分析了其自带的GeoCOM(地理数据通信)接口技术的高级模式,在此基础上利用visual Basic 6.0语言和Access数据库,通过GeoCOM接口对测量机器人进行了二次开发,并应用于某水利枢纽加密控制网的自动观测.最后,通过平差计算得出了一些参考性结论.     

Detection of failure sites by focused ion beam and nano-probing in the interconnect of three-dimensional stacked circuit structures

Focused ion beam (FIB) and nano-probing were applied for failure analysis of three-dimensional stacked circuits with copper through-silicon-vias between the stacked chips. The failure analysis was done after high temperature storage and thermal cycling tests. Passive voltage contrast in FIB allowed to pinpoint the open sites. FIB cross-sections showed the presence of opens at the bottom of the copper vias. The failure cause was suspected to be an interlayer particle, which was confirmed by optical profilometry. Nano-probing was used on another sample to pinpoint the failure location through the measurement of the local resistance within the daisy chains. The failure was traced out to be related with surface contamination.     

An Investigation of Vibration Reducing on a Machine Tool

In order to reduce the vibration on a machine tool, more orthogonal experiment schemes have been designed, which are based on the steel balls vibration reducing principle. After experiments the optimal reducing vibration scheme was determined. This kind of vibration reducing scheme is used in steel balls vibration absorber, which can be used to reduce vibration magnitudes of a machine tools under the working conditions, whereby improving machining precision. The suggested experiment method is of useful reference in reducing vibrations on other machine tools too.     

蒸发氧化法制备高品质活性氧化镉粉末

开发了高品质活性氧化镉粉末的制备工艺，系统地探索了工艺条件对氧化镉电池材料电化性能的影响。对样品进行了物化性能及电性能检测，结果表明，采用蒸发氧化法可制备出镍镉充电电池用高品质活性氧化镉粉末。     

High Gd Concentration GaGdN Grown at Low Temperatures

GaGdN layers were grown at temperatures below 300°C by radio-frequency plasma-assisted molecular beam epitaxy on sapphire substrates. GaGdN samples with high Gd concentration as high as 12.5% were obtained by lowering the growth temperature. X-ray diffraction results showed no obvious secondary phase, which means that the phase separation can be suppressed by the growth at low temperatures. All samples, including those grown at room temperature, showed ferromagnetic characteristics. Photoluminescence emission was observed, though spectra exhibit broad and sharp luminescence bands related to many kinds of defects. It is suggested that electrons coming from defects, especially, nitrogen vacancy, stabilize ferromagnetism, and that the carrier-induced ferromagnetism occurs in the low-temperature-growth GaGdN.     

牵引一制动型液力变矩器原始特性研究

 基于束流理论建立了牵引一制动型液力变矩器原始特性参数计算数学模型．对以D430型液力变矩器为原
型设计的牵引一制动型液力变矩器进行了原始特性参数计算，并将计算结果同D430型液力变矩器原始特性参数进
行了比较分析，结论合理． 对设计牵引一制动型液力变矩器具有一定的指导意义．     

新型水力泵排液工艺

酸化或压裂是改造油气层措施中常规的也是最有效的方法之一。问题是酸化或压裂结束后,采取何种工艺及时返排出残酸,减少残液二次沉淀对油层的污染。同时常规TCP(油管传输负压射孔)+DST(地层测试器)二联作测试工艺在遇到低压、低渗等非自喷油层时,要想取准油层产能、压力,收集到有代表性产液样品资料,困难很大。针对以上问题,大港油田钻采院研制了新型水力喷射泵,该泵可与酸化、压裂及射孔+测试等工艺配套使用,在实现一趟施工管柱同时完成几项工作的同时,利用喷射泵深抽、连续强排的技术特点,取得了较好效果。