锂离子电池组充放电设备的设计与实现

锂离子电池组组合充电一直是锂离子电池的瓶颈问题,为了提高锂离子电池的性能,采用锂离子电池组串充分流的方式,并且设计完善的锂离子电池组充放电维护系统,实现过流、过压、过充、过放、欠压、短路、反接及平衡电压等多重保护功能;同时完成自身电量检测并以灯显及编码方式给出,上位机显示充放电过程状态及充放电历史数据查询。     

细胞自动机在棋盘格角点检测中的应用

根据细胞自动机组成单元简单，单元之间作用具有局部性的特点。本文将细胞自动机的模型应用到棋盘格的角点检测中，棋盘格模板被广泛的应用在摄像机标定中。使用matlab为工具对模型进行了开发，实验结果表明，该细胞自动机模型是一种简单有效的棋盘格角点检测方法。     

视频智能监控检测道路拥挤度方法

近年来，视频监控系统已经广泛应用于道路交通管控中。本文通过检测移动物体的图像序列估算交通拥挤度。该算法是通过拥挤度估算模型计算单位时间内检测移动物体数量，得到实时的交通信息。本文应用MATLAB实现了这一估算方法，并在实际道路测试验证了该计算方法的可靠性。     

Do Immigrants Affect Firm‐Specific Wages?*

We propose and test a novel effect of immigration on wages. Existing studies have focused on the wage effects that result from changes in the aggregate labour supply in a competitive labour market. We argue that if labour markets are not fully competitive, immigrants might also affect wage formation at the most disaggregate level – the workplace. Using linked employer?employee data, we find that an increased use of low‐skilled immigrant workers has a significantly negative effect on the wages of native workers at the workplace – also when controlling for potential endogeneity of the immigrant share using both fixed effects and instrumental variables.     

高速公路软基检测技术的应用分析

笔者结合多年的工程实践经验，对高速公路行业应用软基检测技术进行叙述，希望通过叙述与各位同仁相互交流，为类似工程的施工提供借鉴与参考。     

充分运用量值溯源提高检测工作质量

根据笔者在实验室长期工作的经验,结合实验室的相关标准,按量值溯源的管理途径,进一步阐述了实验室充分运用量值溯源信息,对仪器设备和标准物质进行科学管理的具体方法和措施,为不断提高检测工作质量提供了有力的保证。     

非线性模拟量检测的多点定标方法

嵌入式系统和集散控制系统中,待测模拟量一般都是非线性的。为实现非线性模拟量的精确、快速检测,提出了非线性模拟量的多点定标检测方法。分别给出了分段线性化和分段变频率两种定标方法的编程思路,可提高非线性模拟量检测的精度和局部分辨率。     

斜拉桥检测技术的几点探讨

斜拉桥检测技术作为结构安全保证的有效手段,在实际工程中已广泛应用。斜拉桥检测技术的几项重要方法:索力检测、索塔塔顶位移的检测、结构仿真计算等等,对于能否了解的工作状态,有很大的影响。为提高斜拉桥检测的可靠性和精确度,扩大其应用范围,论文总结了一些实际经验,,提出几点看法,,供有关人员参考,为进一步推广应用斜拉桥检测技术的提供依据。     

基于CPⅢ的无砟轨道检测管理与对策

本文结合目前国内高铁运营维修管理体系尚不健全的现状,针对基于CPⅢ的无砟轨道运营管理现状滞后的原因进行了定性分析,以轨道垂直沉降观测为主线,提出运营管理的三个阶段划分及其目标任务,进一步指出健全管理体制、统一管理标准、保障资金来源是确保无砟轨道运营安全的三个重要方面。     

Safety at play: let's all help to prevent drowning

The association between place of residence, population density, relief and type of event (collision or non-collision of the vehicle) has not been evaluated in developing countries. The main objective of this study is to determine the differential factors associated with the occurrence of deaths of collision and non-collision automobile users in Patagonia, Argentina. A multiple logistic regression analysis was performed using as the dependent variable death by car accident (collision or non-collision of the vehicle) and sex, age, place of residence of the victim, relief and population density as the independent variables. Collision fatalities were related to areas of high population density, while non-collision fatalities were related to areas of low population density, mountainous landscape and place of residence of the victims outside the Patagonian region. The results obtained in this study indicate the need to develop differential primary prevention policies by place of residence of car occupants, focusing on Patagonia non-resident drivers and by emphasising non-collision accidents.