叉车驾驶特点及注意事项

如今,不论是在货场、港口,还是在仓库或大型商场内,均可见到各式各样的叉车在繁忙而有序地作业;尤其是叉车驾驶员那娴熟的技术和潇洒自如的操作,更给人们留下了很深的印象.殊不知,由于叉车在性能和尺寸参数、质量及其功能等方面不同于一般的汽车,所以叉车驾驶员除应具有一般汽车的驾驶常识和技能外,还须掌握一些特殊要求.     

奇瑞轿车日产超百,月销二千

今年年初加入上汽集团的奇瑞汽车公司，生产销售渐入佳境，出现供不应求的市场局面。奇瑞汽车公司位于国家级开发区一芜湖经济     

湖州茅安前大桥60 m预应力混凝土系杆拱桥吊装、施加预应力技术

茅安前大桥30×3+60+30×3(m),主跨为60m预应力混凝土系杆拱,采用分批吊装预制构件、分批施加预应力的安装方案施工.介绍了本桥在安装施工中的预制分段、分批加载安装过程和施工要点.     

沟埋式砼箱涵裂缝成因研究

通过对重庆沙滨路砼箱涵试验段工程地质环境、裂缝分布及发展情况的分析 ,基于现场连续监测、结构计算及有限元数值计算 ,对砼箱涵内部出现的横向裂缝和纵向裂缝进行机理分析 .研究认为 ,箱涵顶部填土荷载、地基纵向及横向不均匀沉降以及箱涵两侧回填土压实度不足是形成裂缝的主要动力原因 .     

提高城市公交服务质量的战略意义

1 问题的提出 (1)乘客对服务质量的要求越来越高.随着社会生产力的进步,人们的生活水平在持续上升;人们对出门乘车的服务质量提出了上档次、多样化、便利性等需求.     

Understanding Spray Coating Process: Visual Observation of Impingement of Multiple Droplets on a Substrate

Spray coating is a facile deposition process with numerous existing and emerging applications. However, spray coating is a stochastic process comprising impingement of many droplets which upon impact on a heated substrate may dry or solidify individually or coalesce first to form a thin liquid film and then dry to yield a thin solid film. There is very limited knowledge on how this process occurs; therefore in this work, high speed imaging is used to visualize the spray coating process. Two model solutions including food-dye with properties like those of water, and poly (3, 4-ethylenedioxythiophene): poly (styrenesulfonate) (PEDOT:PSS), a polymeric solution, are sprayed onto permeable glossy paper and regular impermeable glass substrates. Substrates are kept at room temperature and 80 °C elevated temperature. In some cases, a vertical ultrasonic vibration is imposed on the substrate to study its effect on the coating process. It is observed that the spray coating process is highly random and stochastic. A higher substrate temperature results in a better coating process in that a more uniform and defect-free coating forms. Imposed vibration in the case of glossy paper substrates results in better droplet spreading and more uniform coating. The results also show that under the conditions of these experiments, impinged droplets dry individually or as islands of multiple coalesced droplets to form a coating. In other words, at used spray flow rate and spray droplet size, a continuous thin liquid film does not form prior to drying even at room temperature. Further systematic studies and high magnification lenses are required to visualize and understand the details of the process.     

宁波市和蚌埠市制造业转移与集聚分析

文章通过构建产业静态集聚指数和动态集聚指数,对宁波市和蚌埠市的制造业情况进行定量分析,将制造业的集聚程度按照强化区、形成区、退化区和劣势区四个部分进行划分,实证研究结果全面反映了宁波市和蚌埠市的产业集聚现状,并提出两地制造业转移的建议。     

云计算在汽车电器检测系统中的应用研究

为降低汽车电器诊断设备的成本,同时降低人工检测成本和技术难度,提高检测效率,结合最新互联网云计算和5G网络技术,对汽车云端电器检测系统进行开发。该系统能够针对单台或多台汽车远程同时进行多项诊断操作,包括实现安装检测、ZDC编码检测、ZDC编码写入、软件刷新、DTC诊断以及电器维修方案推荐、全过程电器问题管理等功能。与传统汽车人工诊断工作方式相比,该系统能够提升生产效率、改善汽车产品品质、提升企业竞争力。     

矩阵方程A^TX=B^T,XC=F的双对称非负定解

借助于矩阵的奇异值分解及矩阵的广义逆，给出了矩阵方程A^TX=B^T,XC=F有双对称非负定解的充分必要条件，并在有解的情况下，给出了通解的显式表示。     

软弱破碎围岩条件下隧道施工过程合理台阶长度研究

以千枚岩地质条件下的新两河关隧道为工程背景,基于上下台阶法和上半断面预留核心土法两种模型,利用FLAC-3D有限差分软件对不同台阶长度和核心土长度进行分析,获得了施工过程中合理的台阶长度和核心土长度.