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Microstructure and properties of ductile iron bars for plunger pump prepared by horizontal continuou
Ductile iron bars(DIBs) with a diameter of 145 mm, used for plunger pump production, were made by the horizontal continu......
The use of fiber reinforced polymer(FRP)bars to substitute the steel bars in internal reinforcement is now an alternativ......
现在企业常用的绩效考评方法有图表考评法,目标考评法等,这些方法虽简单易行,但往往不够具体或目标难于分解到个人,使得考评时难于分清......
简要介绍了钢筋混凝土用耐腐蚀钢筋的发展和技术要求,并研究了新标准的修订情况. “,”This article introduced the development ......
InGaSb/AlGaAsSb double-quantum-well diode lasers emitting around 2 μm are demonstrated. The AlGaAsSb bar-riers of the l......
To improve corrosion-resistance of shallow-buried concrete urban utility tunnels(UUTs),basalt fiber reinforced polymer(B......
Evaluation of Transverse Markings as a Speed Transition Zone Countermeasures in Small, Rural Communi
Small rural communities located along major state or county roadways typically find most of the traffic along their main......
借助积分方程理论,探讨了非均质变截面弹性直杆的振动问题。经过研究发现,只要直杆的弹性模量、密度和横截面面积可用一函数表示,......
从文化生态学与文化社会学视角观察,酒吧不仅仅是一种娱乐场所,还是一种"群落生境"。在这儿,"一切皆有可能",此乃酒吧魅力真正所在......
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本文以江苏苏钢集团有限公司棒材厂精整探伤线为例,介绍精整探伤工艺流程及主要技术装备,简要分析了其工艺设备的主要技术特点。......
用积分方程理论中的迭核理论,得到了楔形体振动的固有频率的一个区间估计。本方法不需要假设试函数,也不需要解超越方程,只要计算......
目前铁路混凝土工程大量采用钢筋机械连接,取代了传统的钢筋焊接连接方式。本文依据"等强度连接"设计原则,选取铁路混凝土工程常用的......
运用有限元特征值分析方法对应力波作用下直杆塑性分叉动力失稳问题进行了研究.基于应力波理论和相邻平衡准则导出了直杆塑性动力失......
选取BT3-1钛合金三次熔炼铸锭,经开坯、锻造、径锻后得到棒材,一根棒材上取样进行不同的热处理试验,并研究不同热处理工艺下的显微......
分别采用α+β锻造和β锻造方式制备了TC21合金φ90mm棒材,研究了两种加工方式下同规格棒材的裂纹扩展速率,分析了粗细两种片层结构对......
The traditional gravity modelling methods fail to deal with ambiguity zones.These zones are likely to be associated with......
介绍了平面机构运动分析和力分析交互式软件的设计思想、设计功能与设计方法。该软件是以Visual Basic5.0为设计语言,将参数化设计与交互式设计相......
采用有限元方法对螺纹钢筋轧后控冷时的传热行为进行了数学解析,并在ANSYS有限元软件的平台上进行二次开发编程,对钢筋在控冷过程......
As candidate of structural material for advanced domestic aircraft, a new high strength and toughness titanium alloy TC2......
在详细分析原有大型圆柱滚子车加工方法不足之处的基础上,提出了切实可行的改进方法,大大减少了加工工序,提高了产品质量和加工效率,减......
研究了980oc和950℃2种温度轧制的BT25钛合金棒材的室、高温拉伸性能、热稳定性能以及持久性能。研究结果表明,所研究的2种温度下得......
拉压结构杆在结构工程中广泛存在,是重要的承载元件。但因各种误差的存在拉压杆常处于偏心拉压受载状态中,研究其动态响应是保证其......
【正】深入有效地开展大学生党员考核工作是增强学生党员教育管理,构建发挥党员先锋模范作用长效机制的重要举措。在当前的学生党......
应用离散系统的稳定性理论,在“冻结”系数的条件下研究了在轴向应力波作用下弹性直杆的稳定性的特点,得出了特征矩阵的特征值随应力......
通过地质、测井、地震及室 内综合择渤海湾盆地惠民凹陷西部下第三系沙河街组三级、四段发育的两种滩坝沉积进行了研究。结果表明......
本文对海洋环境下影响混凝土耐久性和引起钢筋腐蚀的原因及机理进行了分析,并引入试验数据,进一步着重说明海水中的SO24-、Cl-对混......
对具有初速的刚性块与有限长弹性杆轴向冲击的稳定问题进行了分析。将冲击惯性力作为体积力,把动态问题转化为准静态问题处理,并应用......
The performance of concrete beams repaired with epoxy mortar was investigated by constructing twelve beam specimens.All ......
本文提出了一种对于任意截面杆件扭转问题都适用的边界解法。该法的原理及相应的通用计算程序比有限元法或边界元法都简单得多,而......
采用锻造与步进轧制工艺制备了Ti-6-22-22S合金φ50 mm 和φ125 mm两规格棒材,测试了其室温力学性能,观察了加工态及不同热处理状......
Indirect Tensile Characterization of Graphite Platelet Reinforced Vinyl Ester Nanocomposites at High
An indirect tensile testing method is proposed for characterizing low strength graphite platelet reinforced vinyl ester ......
The incorporation of fiber-reinforced-polymer (FRP) bars in construction as a replacement to steel bars provides a super......
本文介绍了新开发的机械原理CAD软件,该软件是以QuickBasic(简称QB)为主设计语言,将参数化设计性与交互式设计相结合,输出结果采用数据表格,绘图曲线及动......
Reliable induction motor (IM) fault detection techniques are very useful in industries to diagnose IM defects and improv......
The Stress-strain Analysis for the Linearly Elastic and Power Hardening of Strength Difference Plane
The plane structure of bars jointed to a rigid-body is a complex and universal structure.Some other structure of bars ca......
Experiments are performed in a wave flume to demonstrate the Bragg reflection of linear gravity waves by artificialbars.......
Comparative Studies of Steel, Bamboo and Rattan as Reinforcing Bars in Concrete: Tensile and Flexura
This study comparatively evaluated the flexural performance and deformation characteristics of concrete elements reinfor......
Broken Rotor Bar Fault Detection of Induction Motors Using a Joint Algorithm of Trust Region and Mod
A precise detection of the fault feature parameter of motor current is a new research hotspot in the broken rotor bar(BR......
从直杆的线应变定义出发,讨论了直杆在拉伸或压缩时横截面的变形及对直杆体积的影响,给出了横截面变形和体积变化与线应变和材料泊......
Buildings collapse has now become a recurrent phenomenon in C<span style="white-space:nowrap;">ô</span>te d’Ivoire......
针对现有的成捆棒材计数方法存在计算速度低、色差偏差大、计算量大、易受边缘模糊及残缺影响的问题,提出了一种通过对成捆棒材中......
高等院校教学质量的提高,不单只是以高素质教师队伍为前提和保证,高效的教务管理也是教学质量的有效保障之一.针对现有高校教务人......