非线性矿井瓦斯涌出量预测及基于.NET的开发应用

分析了地质因素和工程因素对矿井瓦斯涌出量的影响,提出了瓦斯涌出量非线性回归预测方法.根据矿井实际情况确定了需要分析的影响因素,通过STATISTICA统计软件中Nonlinear Estimation和FixedNonlinear regression模块建立和检验了瓦斯涌出量非线性回归数学模型,得出非线性回归数学模型瓦斯涌出量与主要影响因素具有较高的相关性.应用.NET提供的可视化界面及C#程序语言开发了瓦斯涌出量非线性预测软件,通过对成庄矿3390采面预测效果验证,表明非线性回归预测方法对矿井瓦斯涌出量预测是可行的.     

预应力锚索技术在鱼潭电站大坝闸墩结构处理中的应用

论述了预应力锚索技术在实际工程中的重大意义．扼要介绍了预应力锚索技术在鱼潭电站大坝闸墩结构处理中的成功应用．此外,还对施工工艺中关键问题进行了说明．实例表明预应力锚索技术具有显著的工程效益和经济效益．     

熟料窑运行状态检测应用研究

阐述了对回转窑运行轴线进行监测的重要性 ;介绍了一种回转窑运行轴线监测的研究成果 ,该方法采用 15°方向键相法测量窑体截面的回转中心 ,通过对窑各挡支承轮带两侧的截面测量而获得运行轴线 ;研制的监测系统结构简单 ,运行可靠 ,监测精度高 ,操作、使用、维护方便 ,并成功地应用于实际生产中     

圆锥孔双列圆柱滚子轴承径向游隙的合理选择

论述了圆锥孔双列圆柱滚子轴承的安装，温度，载荷对轴承工作游隙的影响以及工作游隙对轴承使用寿命的影响，并分析了相互关系，介绍了一种合理选择径向游隙的方法。     

CAN总线在电动汽车BMS系统与充电桩之间通信的应用

电动汽车是我国新能源战略重点之一,国家电网公司为此积极展开电动汽车充电站的建设。国家电网将按照换电为主、插充为辅,集中充电、统一配送为基本商业模式,加快电动汽车充换电站的布局和建设。不论是插充方式还是集中充电,电动汽车的普及都离不开充电智能化,而BMS与充电桩或其他充电设备的无缝连接正是实现充电智能化的必要条件。文章提出了BMS管理系统与充电桩之间的通信设计方案,利用CANBUS实现BMS管理系统与充电桩的通讯,介绍了CAN通讯的硬件设计和软件设计,并经过与充电桩的反复测试,实现了BMS管理系统与充电桩的通信。     

消焰剂对煤矿导爆索安全性的影响

普通导爆索用于矿井中,在传爆中易引燃瓦斯、煤尘,造成爆炸事故.文章在普通导爆索的药芯和外层添加消焰剂,同时采用探针测量爆速,利用充甲烷气体装置测试安全性.结果表明药芯中掺加氯化石蜡,外包覆氯化钠的导爆索爆速降低,而安全性显著提高.     

圆柱密封镉镍电池的设计

设计了专用于电动手枪钻的圆柱密封镉镍蓄电池.详述了正负极板、电解液、电池零部件的设计思路及工艺参数.按该设计制出的样品,尺寸为(?)22.0mm,高 42.4mm;0.2C放电容量 1480mAh;12A放电至0.9V的放电时间5.4min;1.2A充电1.75h不漏碱,不气胀;400mA充电24h不漏碱,不气胀.完全达到了设计要求.     

水基淬火液在钢管热处理上的应用

在分析各种水基淬火液性能的基础上,选用冷却速度与VM48快速淬火油相近的F-2000水基淬火液,热处理后钢管的力学性能不仅符合标准要求,而且彻底消除了火灾隐患及对环境的污染。     

Development of a simple model for batch and boundary information updation for a similar ship’s block model

In early 2000,large domestic shipyards introduced shipbuilding 3D computer-aided design (CAD) to the hull production design process to define manufacturing and assembly information.The production design process accounts for most of the man-hours (M/H) of the entire design process and is closely connected to yard production because designs must take into account the production schedule of the shipyard,the current state of the dock needed to mount the ship’s block,and supply information.Therefore,many shipyards are investigating the complete automation of the production design process to reduce the M/H for designers.However,these problems are still currently unresolved,and a clear direction is needed for research on the automatic design base of manufacturing rules,batches reflecting changed building specifications,batch updates of boundary information for hull members,and management of the hull model change history to automate the production design process.In this study,a process was developed to aid production design engineers in designing a new ship’s hull block model from that of a similar ship previously built,based on AVEVA Marine.An automation system that uses the similar ship’s hull block model is proposed to reduce M/H and human errors by the production design engineer.First,scheme files holding important information were constructed in a database to automatically update hull block model modifications.Second,for batch updates,the database’s table,including building specifications and the referential integrity of a relational database were compared.In particular,this study focused on reflecting the frequent modification of building specifications and regeneration of boundary information of the adjacent panel due to changes in a specific panel.Third,the rollback function is proposed in which the database (DB) is used to return to the previously designed panels.     

PCB检查的声学工具及其应用

随着电子封装技术不断朝着微型化的发展,在检查倒装芯片封装和芯片规模封装中,声学微成像技术得到了极大的应用.利用扫描探测器把超声波用脉冲输入倒装芯片或别的封装,超声波在封装中向下穿透,直至遇到两种不同材料之间的界面为止.