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三峡船闸高边坡节理岩体稳定 分析及加固方案初步研究

Zhu Weishen,Zhang Yujun,

岩石力学与工程学报 , 1996,
Abstract: The FEM with a fracture damage model has been adopted to analyse the stability of high slope of Three Gorges flight lock. In analysis, the generation of subcracks of joint tips and its additional deformation as well as the possibility of further extension are considered under the compressive shear stress condition. The effect of rock bolts for controling this type of rock failure to reduce the damage evolution zones of joints and the slope deformation is studied and optimization analysis and evaluation of different anchoring schemes are made also.
Experimental Study of Titanium Hi-Lock Bolts Installation Using Stress Wave

- , 2017,
Abstract: 干涉配合可大幅度提高接头疲劳寿命。对基于应力波加载的钛合金干涉螺栓的高速安装过程进行了理论分析,对其安装工艺参数进行研究。研究表明:基于应力波加载的高速安装方法的安装阻力明显小于同等条件下准静态安装方法的安装阻力,干涉量1%、1.5%和2%下最大安装阻力分别为3.92 kN、5.64 kN和6.11 kN;安装阻力随干涉量和安装次数增加而升高,随加载速度增加而降低;多次安装容易造成孔壁划伤,同时发现加载速度过大容易引起螺栓头损伤;干涉配合紧固件安装时孔边最大凸瘤高度与干涉量、安装速度和安装次数、摩擦因数正相关。
Interference-fit technology can significantly improve the fatigue life of bolted joints. In this study, based on the stress-wave driving technology, the high-speed driving process of titanium hi-lock bolts was analyzed theoretically, and the process parameters of driving were studied. The results show that the driving resistance of M8 titanium hi-lock bolts for the stress-wave driving is significantly lower than that of static driving under the same condition. The maximum values of the driving resistance under the interference sizes of 1%, 1.5% and 2% are respectively 3.92KN, 5.64KN, and 6.11KN. The installation resistance increases with interference sizes and driving times, while increases against with driving speeds. However, hole crash can be found under several times installation and the damage of bolt head can occur under the higher installation speeds. The maximum height of protuberance increases with interference sizes, driving speeds, driving times and friction coefficients
潮汐河口支流建闸闸下淤积研究  [PDF]
海洋工程 , 2006,
Abstract: 潮汐河口建闸的关键问题是闸下淤积。在潮汐河口支流口门上建闸,其闸下淤积面貌主要取决于干流主槽的位置,这与在潮汐河口干流上建闸的闸下淤积问题有着本质上的差异。以钱塘江河口支流曹娥江口门建闸为例,应用河床演变分析、动床实体模型和现场冲淤试验预测了曹娥江大闸闸下淤积面貌和淤积速率,为曹娥江大闸的建设提供了科学依据。
Brane worlds with bolts  [PDF]
Jorma Louko,David L. Wiltshire
Physics , 2001, DOI: 10.1088/1126-6708/2002/02/007
Abstract: We construct a family of (p+3)-dimensional brane worlds in which the brane has one compact extra dimension, the bulk has two extra dimensions, and the bulk closes regularly at codimension two submanifolds known as bolts. The (p+1)-dimensional low energy spacetime M_{low} may be any Einstein space with an arbitrary cosmological constant, the value of the bulk cosmological constant is arbitrary, and the only fields are the metric and a bulk Maxwell field. The brane can be chosen to have positive tension, and the closure of the bulk provides a singularity-free boundary condition for solutions that contain black holes or gravitational waves in M_{low}. The spacetimes admit a nonlinear gravitational wave whose properties suggest that the Newtonian gravitational potential on a flat M_{low} will behave essentially as the static potential of a massless minimally coupled scalar field with Neumann boundary conditions. When M_{low} is (p+1)-dimensional Minkowski with p\ge3 and the bulk cosmological constant vanishes, this static scalar potential is shown to have the long distance behaviour characteristic of p spatial dimensions.
水平防渗系统在金沙峡水电站的应用  [PDF]
人民黄河 , 2009,
Abstract: ?金沙峡水电站闸基坐落在含漂石砂卵石覆盖层上,最大闸高34.2m,经综合比较,对于这种软基高闸的防渗采用水平防渗方案比垂直防渗方案节省投资且能缩短工期,因此枢纽防渗选择水平防渗方案.水平防渗系统通过设置可自淤的复合土工膜壤土铺盖,以及主要防渗线预留垂直防渗灌浆管道等措施,来提高防渗方案的可靠性.枢纽蓄水后渗水量和建筑物基地扬压力均属正常.
平底闸及闸室驼峰堰的水力特性  [PDF]
人民黄河 , 2012,
Abstract: ?从理论上论证平底闸的水力特性及闸室中驼峰堰、驼峰堰的相对位置对流量系数的影响,分析各种计算泄流能力(只考虑自由出流情形)的常用方法,并对这些计算方法进行比较.结果表明:布置合理的闸型,可提高闸的泄流能力;平底闸闸室内加设驼峰堰,对提高流量系数的作用很大,但驼峰堰在闸室中所处的位置对提高流量系数的作用是不同的;驼峰堰加在闸室中部靠前的部位是最佳的布置形式.
Using RDMA for Lock Management  [PDF]
Yeounoh Chung,Erfan Zamanian
Computer Science , 2015,
Abstract: In this work, we aim to evaluate different Distributed Lock Management service designs with Remote Direct Memory Access (RDMA). In specific, we implement and evaluate the centralized and the RDMA-enabled lock manager designs for fast network settings. Experimental results confirms a couple of hypotheses. First, in the traditional centralized lock manager design, CPU is the bottleneck and bypassing CPU on client-to-server communication using RDMA results in better lock service perofrmance. Second, different lock manager designs with RDMA in consideration result in even better performance; we need to re-design lock management system for RDMA and fast networks.
光子学报 , 1975,
Abstract: 本文着重讨论克尔盒高速光闸之楔形电极的设计以及克尔盒之工作物质——硝基苯的提纯技术。
Canal Lock Displacement
Rick Blanton
Undergraduate Journal of Mathematical Modeling : One + Two , 2010, DOI: 10.5038/2326-3652.3.1.13
Abstract: In this project we determine the time needed for a pump to raise the water level in a canal lock in order for a boat to continue upstream. Using calculus methods and elementary physics, it was determined that it would take roughly 5 minutes for a single 60 horsepower pump to raise the water level the required 10 feet. We conclude that the lock is fairly efficient but offer some suggestions to increase the time efficiency of the lock system.
Hedging the Treasury Lock  [PDF]
Mario Pucci
Journal of Mathematical Finance (JMF) , 2019, DOI: 10.4236/jmf.2019.93018
Abstract: The Treasury lock is a common pre-hedging derivative strategy the Street offers to their corporate clients. The paper provides a justification of the common practice of booking a short position in the Treasury lock as a forward contract on the underlying benchmark and a short position in the Then-Current Treasury lock as a forward contract on underlying benchmark rolled over the life of the contract.
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