摘要：In order to meet the needs of various tasks of water conservancy project, tunnel excavation under the ground, called hydraulic tunnel. Hydraulic tunnel according to the functions of flood discharge, water diversion, irrigation, water supply, and the construction diversion tunnel of desilting emptying. Nowadays, water conservancy project on flood discharge runnel design requirements more and more high, so the factors taken into account the amount of spillway tunnel engineering, engineering cost, structure design and other factors to evaluate nature of the spillway tunnel is very important. Therefore, in actual construction, of spillway tunnel of optimization design, whether from the economic point of view, or from the point of view of safety and applicability are necessary. This article mainly from the overall layout of flood discharge tunnel, structure design and so on, and then discuss the optimization scheme.

摘要：With the development of economy, the adjustment of industrial structure, the improvement of people＇s living standard and the expansion of urbanization, the structure of the city has changed a lot. The proportion of industrial use of electricity decreased year by year, the proportion of household electricity, commercial electricity and public utilities increased year by year, the peak and valley change increased year by year. Therefore, the construction of hydropower project, to improve the current situation of the system of regulating the power grid, has a positive role in promoting. Reinforced rock fill dam with face slab in foreign countries has been built and at the dam more than 50m high dam more than 70 seats, of which more than 100m high dam 18. At present, Brazil estuary aliya rock fill dam is the highest dam in this kind of dam in the world, built in 1980, has been running well. Our reinforced rock fill dam with face slab design and construction technology in the introduction of digestion and absorption of foreign advanced experience in the foundation, the systemic research on a considerable scale. The design level and construction technology of the rock fill dam with face slab in our country have reached the international advanced level by the complete technology of the construction of the 100m level rock fill dam with face slab. This paper mainly from the rock fill dam with face slab, dam type selection and layout of water conservancy project comparison; dam profile design; detail dam; dam high determined; stability analysis; strength calculation; overflow capacity check aspects were studied.

摘要：传统的冷链物流智能分拣系统的分拣效果差,为了解决这一问题,提出基于无线射频识别技术的冷链物流智能分拣系统设计。系统硬件包括主机装置电路、显示装置电路、指令装置电路、重量信号采集装置电路和冷链分拣装置电路设计。系统软件,使用无线射频识别技术实现冷链物流智能分拣。软、硬件结合,完成基于无线射频识别技术的冷链物流智能分拣系统的设计。最后,搭建实验环境,再调试硬件、软件和串口连接方式。完成实验环境搭建后,分别测试两个系统的分拣效果。实验结果表明,基于无线射频识别技术的冷链物流智能分拣系统的分拣效果更好,符合设计需求。

摘要：针对相关干涉仪测向中相位差模糊导致的强非线性问题,提出一种基于高拉伸度的改进遗传算法,该算法以遗传算法中择优选取机制为基础,通过定义拉伸度,根据相关干涉仪测向中相关函数及其对自变量的偏导数在目标方向附近均趋近于0的特性,设计新的适应度函数,增大全局最大值附近适应度函数的拉伸度,扩大与其他方向的适应度的差距,从而实现对选取机制的优化。仿真实验表明,该算法复杂度低,当测向精度基本相同时,测向时间约为网格法的1/600,且具有良好的适用性,可以广泛应用于其他求解最大值的问题中。

摘要：奥氏体钢的焊缝组织会导致超声波信号衰减强于其他材料的焊缝。粗大组织会使声波发生散射且波形易发生转换,导致假信号出现。本文采用LabVIEW平台设计了上位机超声波检测系统软件,以对奥氏体钢超声波检测信号进行分析处理及缺陷判定。

摘要：目前星载信号处理平台中大量使用商用芯片,但商用芯片抗辐射能力较弱,在空间环境下常出现单粒子翻转(Single Event Upset,SEU),从而造成系统功能紊乱,甚至中断。提出以星载信号处理平台中大量使用的SRAM型FPGA为研究对象,采用故障注入的方式研究FPGA中不同硬件资源对于SEU效应的敏感性问题。根据不同资源对SEU效应表现出不同敏感性的结论,可在SRAM型FPGA的抗SEU防护上进行有针对性的设计。

摘要：为了在汽车意外事故后伤者能得到及时的救援,设计了一种基于嵌入式的汽车事故求救系统。该系统以MC9S12XS128为主控芯片,利用三轴加速传感器MPU6050和GPS(Global Positioning System)判断车辆的姿态信息和位置信息,并通过GSM(Global System for Mobile Communications)模块将车况数据传给呼叫中心和家属端,接收端对事故确认后迅速救援。测试结果证明了该系统的可靠性。

摘要：堆载预压法需要分级加载,处理时间较长,工程中需要在达到满载后使用恒载期数据对地基最终沉降进行预测,以观察处理效果和估算工期。该文结合某填海造地项目的实测数据,使用三点法、浅冈法、双曲线法对沉降进行预测,重点分析了计算的起始时间、监测时间长短、数据间隔时间对于预测结果的影响。研究结果表明:计算的起始时间对于三点法、浅冈法有较大影响,对于双曲线法的计算结果影响较小;监测时间长短对于三种计算方法均有影响;数据间隔对于三点法、浅冈法有影响,而双曲线法不受其影响。建议工程中根据监测时间的不同情况,采用两种方法相结合,可提高预测精度,减少偏差。

摘要：驾校教练在指导学员时需要反复进行提示操作,这无疑会使驾校教练的工作量加大;同时一些教练普通话发音不标准也会给学员带来困扰。针对这种情况,本文设计一套基于STC89C52RC单片机的语音提示系统,将考试所需的提示语音存储在语音模块中,教练员根据路面情况通过遥控器按下相应的按键,系统就会播放对应语音指令,学员根据语音指令完成相关操作,该语音提示系统可以大大减轻教练工作量。

摘要：基于GEO卫星通信信道特性,分析现有LTE重传机制适应性改造所面临的问题,提出一种单层重传机制。该机制结合卫星链路时延大、信道质量较好的特点,去掉RLC层ARQ机制设计,并利用单层重传机制的通道数与RTD的相关性,通过扩展通道数及减少最大传输次数,提高现有重传机制对GEO卫星大时延信道特性的适应性。仿真结果表明,该重传机制能确保数据可靠性传输,缓解反馈信息带来的时延问题,提高系统吞吐量。