共查询到20条相似文献,搜索用时 93 毫秒
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本研究目的是编写反算分析程序来讨论所选择路面试验路段的反算结果。由于路面材料的应力和应变关系为非线性,所以反算分析将采用非线性材料模型,再将反算得到的材料性质与非线性有限元素法结合。本研究将应用Data Pave网站所取得的试验路段FWD数据的方法来进行选取及反算分析,并利用分析所得的结果,求出此路段路面材料性质的统计参数。 相似文献
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文章结合广梧高速四标施工测量的实际情况,对线路中边桩任意里程坐标正反程序的基本思路、基本原理作简单的论述,并对该程序的优缺点、精度作具体的阐述,对测量人员有一定的实用价值。 相似文献
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何涛 《中小企业管理与科技》2007,(5):76-76
落锤式弯沉仪(FWD)是目前国内外应用最为广泛的无损式路面弯沉检测设备,应用FWD测定路面弯沉具有省时、省力、测定结果精度高的优点。通过FWD测定的各测点在冲击荷载作用下的动态弯沉峰值和弯沉盆数据,可以反算路面各结构层的模量,从而对道路施工质量和使用情况做出评价,这是其它弯沉测定方法所无法比拟的。[第一段] 相似文献
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池军锋 《中国高新技术企业评价》2009,(24):175-176
随着经济的发展,线路工程如高等级公路、油气管线等的建设越来越多。在公路控制测量中,为了满足施工放样中的变形达到测量规范的规定,就需要选择一个合适的投影面和投影带,亦即合理地确立工程平面控制网的坐标系。文章论述了投影面和投影带的选择方法。分带投影法、分区抵偿法、边长约束法等方法较好地控制长距离线路工程控制网测量中的投影长度变形值,为工程施工提供可靠保障。 相似文献
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James R Evans 《Journal of Operations Management》1985,5(2):229-235
We consider an N-period planning horizon with known demands Dt ordering cost At, procurement cost, Ct and holding cost Ht in period t. The dynamic lot-sizing problem is one of scheduling procurement Qt in each period in order to meet demand and minimize cost.The Wagner-Whitin algorithm for dynamic lot sizing has often been misunderstood as requiring inordinate computational time and storage requirements. We present an efficient computer implementation of the algorithm which requires low core storage, thus enabling it to be potentially useful on microcomputers.The recursive computations can be stated as follows: where Mjk is the cost incurred by procuring in period j for all periods j through k, and Fk is the minimal cost for periods 1 through k. Our implementation relies on the following observations regarding these computations: Using this recursive relationship, the number of computations can be greatly reduced. Specifically, N2 ? N2 additions and N2 + N multiplications are required. This is insensitive to the data.A FORTRAN implementation on an Amdahl 470 yielded computation times (in 10?3 seconds) of T = ?.249 + .0239N + .00446N2. Problems with N = 500 were solved in under two seconds. 相似文献
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For Poisson inverse Gaussian regression models, it is very complicated to obtain the influence measures based on the traditional
method, because the associated likelihood function involves intractable expressions, such as the modified Bessel function.
In this paper, the EM algorithm is employed as a basis to derive diagnostic measures for the models by treating them as a mixed Poisson regression
with the weights from the inverse Gaussian distributions. Several diagnostic measures are obtained in both case-deletion model
and local influence analysis, based on the conditional expectation of the complete-data log-likelihood function in the EM algorithm. Two numerical examples are given to illustrate the results. 相似文献
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高效卷烟分拣系统在秦皇岛市卷烟物流中心的实现 总被引:1,自引:0,他引:1
秦皇岛市卷烟物流中心规划年销量11万箱,面向全市卷烟零售点进行配送.普天物流技术有限公司作为河北省烟草公司卷烟物流中心的物流系统集成商,承担了秦皇岛市卷烟物流中心工艺设备的建设与集成工作.目前,新建设的秦皇岛市卷烟物流中心已经运行超过半年,实现了全部业务向新物流中心的成功转移,并实现了全市销售卷烟统一分拣到户、统一配送的目标. 相似文献
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《Human Resource Management Review》2018,28(3):258-270
Human resource management (HRM) research has documented the importance of high performance work practices (HPWPs) to organizations, and recent efforts have argued for increasing attention to the role of line manager implementation of HPWPs. To date, research in this area has focused largely on the organizational or employee implications of HPWP implementation, ignoring the process through which implementation affects outcomes. In this article, we use theory on impression formation to describe the perceptual process through which line manager implementation of HPWPs facilitates the formation of different employee impressions of manager leadership styles. We argue that this process is contingent upon employee attributions of implementation intent, which are influenced by the interaction of employee affective and attributional tendencies with line manager implementation style (i.e., political skill). Our conceptualization of this process contributes to HRM research by demonstrating the benefits of integrating it with leadership theory, as well as identifying the role of interpersonal perceptual processes in the effects of HPWPs. 相似文献
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本设计以程控增益放大器AD603为核心,通过单片机STC89C52控制各模块,实现了输入信号及环境噪声幅度自动调节音量的自动增益控制音响放大器。文章重点介绍了程控放大模块、噪声采集模块、有效值检测模块等主要电路模块。系统从mp3或信号源输入音频(100 Hz~10 k Hz)信号给程控增益放大器AD603,将信号放大输... 相似文献
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文章研究并总结了多个远程监控系统车载终端的原理和实现方法,介绍了三一重工研发的应用于工程机械的远程GPS监控终端,对该终端的硬件和软件原理进行了说明,最后对终端进一步的改进提出了一些设想。 相似文献
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Exploring a unitarist and pluralist Human Resource Management (HRM) perspective, we propose a more nuanced view on Bowen and Ostroff's (2004) concept of strong HRM processes. More specifically, we investigate whether strong HRM processes contribute positively or negatively to line managers' effective HRM implementation. The results of a multi‐level model with data from 125 line managers and 899 employees of five organisations show a complex picture. In line with unitarist thinking, we find a positive indirect effect of strong HRM processes on HRM implementation effectiveness via line managers' ability. In accordance with pluralist thinking, we find a negative direct relationship between strong HRM processes and HRM implementation effectiveness. We discuss the tensions in HRM that might explain these ambiguous findings. 相似文献
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Reel ID的应用包括实物流和信息流两方面内容,也是Reel ID应用的两个基本点,是决定其可否善终的关键. 相似文献
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Jordi Trullen Luigi Stirpe Jaime Bonache Mireia Valverde 《Human Resource Management Journal》2016,26(4):449-470
The implementation of human resource (HR) practices (HRPs) is increasingly regarded as a cornerstone in the achievement of overall HRM effectiveness. This article addresses the role of the HR department in contributing to line managers' (LMs) effective implementation of HRPs. It does so by comparing the actions of HR departments in both effective and ineffective implementation processes in different firms. Its findings reveal that HR departments can make a difference by taking initiatives that foster LMs' implementation abilities, motivation and opportunities, such as deploying in‐the‐field HR specialists, framing practices in appealing ways, involving LMs in the development of HRPs and seeking CEO support, among others. By fleshing out these HR initiatives and linking them to the AMO framework, we build an inductive model that offers a more nuanced view of what HR departments can do to have their proposals effectively implemented by LMs. 相似文献