冻结法在湖口大桥桩基施工中的运用

介绍人工地层冻结法施工在九景（九江——景德镇）高速公路湖口大桥大直径桩基施工中的应用情况，阐述冻结法施工的一般原理和方法。     

不同易密实超薄罩面处治方案应用效果分析

为了验证易密实超薄罩面作为一种预防性养护技术对改善路表功能、减少车辙、提高耐磨、抗滑的效果,该文结合江西省某高速公路沥青路面技术状况的平整度、车辙、抗滑等性能指标,采用了铣刨回补后易密实超薄罩面、精铣刨后易密实超薄罩面以及直接易密实超薄罩面3种处治方案,对不同处治方案路段的应用效果进行跟踪观测,结果表明:3种处治方案对路面平整度改善效果均不明显,但对路面车辙和抗滑性能处治效果较好,其中车辙改善效果铣刨回补方案最好,其次为精铣刨后罩面,最后为直接易密实超薄罩面。     

Dynamic Analysis of Micro-machined Diamagnetic Stable Permanent Magnet Levitation System

A novel micro-machined diamagnetic stable levitation system (MDSLS) which is composed of a free permanent magnetic rotor, a ring lifting permanent magnet and two diamagnetic stabilizers was presented. The static and dynamic stable characters of MDSLS were analyzed. The coupled non-linear differential equations were used to describe six-degree-of-freedom motion of the levitated rotor, and the equivalent surface current and combined diamagnetic image current method were utilized to model the interaction forces and torques between the lifting permanent magnet and rotor permanent magnet and also between the rotor permanent magnet and diamagnetic substrates. Because of difficulty to get analytical solution, the numerical calculation based on Runge-Kutta method was used to solve the dynamic model. The vibration frequencies were identified by fast Fourier transform (FFT) analysis. According to their resonance characteristics and parameters, the translational and angular dynamic stiffness were also calculated. The results show that the levitation of the rotor in MDSLS is stable, and the MDSLS is potential for the application in levitation inertial sensor.     

Capacitance Sensing and Software-Realized Lock-in Amplifier for the Electromagnetically Levitated Micro Gyroscope

In the novel prototype of micro-gyroscope structure,the new configured capacitance sensing scheme for the micro gyroscope was analyzed and the virtual instrument based detection scheme was implemented.The digital lock-in amplifier was employed in the capacitance detection to restrain the noise interference.The capacitance analysis shows that 1 fF capacitance variation corresponds to 0.1 degree of the turn angle.The differential capacitance bridge and the charge integral amplifier were used as the front signal input interface.In the implementation of digital lock-in amplifier,a new routine which warranted the exactly matching of the reference phase to signal phase was proposed.The result of the experiment shows that digital lock-in amplifier can greatly eliminate the noise in the output signal.The non linearity of the turn angle output is 2.3% and the minimum resolution of turn angle is 0.04 degrees.The application of the software demodulation in the signal detection of micro-electro-mechanical-system(MEMS)device is a new attempt,and it shows the prospective for a high-performance application.     

STP-yh型无线调车系统的应用及扩展分析

STP-yh型（Shunting trainprotection yh原DJK）无线调车机车信号和监控系统软件及系统集成（以下简称为STP-yh系统）,近年来已经发展成为成熟稳定的信号设备,有效保证了CTC区段调车作业的安全。在修订后的铁建设[2009]62号文中也有明确规定：CTC区段的专用调车应配套无线调车机车信号及监控装置,系统的重要性已得到广泛认可。     

无线调车机车信号和监控系统的模拟子系统（联锁、车列）

联锁、车组模拟子系统是对STP-yh型无线调车机车信号和监控系统进行工程化的研究成果,是实验室模拟测试平台中的一个重要组成部分。介绍了这一模拟子系统的专有功能。     

灰色GM（1，1）模型在管道腐蚀预测中的应用

随着运营时间的增加,输气管道必然受到不同程度的腐蚀,如果不及时维修或更换,一旦发生泄漏引起爆裂,将会造成极大的损失。为了对输气管道的腐蚀程度进行预测,掌握输气管道腐蚀的基本规律,运用GM（1,1）模型对输气管道的腐蚀速度和腐蚀深度的原始数据进行了灰色动态拟合,建立了相应的灰色微分方程和灰色时间响应函数,应用于四川某气田输气管道未来6年的腐蚀情况预测。计算结果表明：建立的管道腐蚀预测模型GM（1,1）模型,与实测数据相比,误差较小,具有一定的实用价值,能为管道运营者采取相应防腐措施提供可靠的依据。     

车厢可卸式垃圾车卸料自动化控制技术研究

国内车厢可卸式垃圾车匹配的移动压缩垃圾箱，其后门启闭采用人工对接液压快速接头，将车辆动力源通过液压管路来驱动垃圾箱后门液压锁紧机构进行启闭，未达到自动化程度，劳动强度大，操作员存在疏忽未操作、动作执行效果无警示等，影响了车辆卸料的安全性及可靠性。针对这一状况，从提高液压快速接头自动化程度着手进行研究与分析，运用拉臂钩原有电-气-液的机械自动化控制技术及专用拔插装置，自动执行快速接头拔插复位，并通过指示灯及警报进行提醒警示，大大提高了液压快速接头自动化程度，解决了存在的问题，保证了车厢可卸式垃圾车卸料、卸厢的安全性及可靠性，为车厢可卸式垃圾车的研发提供了技术途径和借鉴。     

洗扫车清水箱有限元分析与结构改进

洗扫车清水箱作为洗扫车的重要组成部分，发挥着工作介质水的承载、车辆外观造型表达、部分车辆结构件安装等功能，部件的可靠性和耐久性直接关系着车辆性能与用户体验。在某新型洗扫车清水箱开发过程中，结合有限元分析方法及以往车辆故障表现，对清水箱结构做了分析优化。车辆可靠性试验以及市场使用情况表明：优化后的清水箱结构未出现开裂、变形等问题，满足车辆使用要求；产品设计结合有限元分析方法可以有效缩短研发周期，降低产品研发成本。