基于拉格朗日公式的水流路径算法研究

提出了一种水流路径算法,该算法通过以各格网点为中心建立3×3窗口内基于6条拉格朗日曲线构成的局部曲面,再利用当前点在局部曲面中的等高线曲率选取合适的单流向算法以确定当前点的水流方向及其向下游点的流量分配比例。最后通过实例证明了该方法在水流累积量计算中的良好效果。     

海上平台桶形基础沉贯过程的数值分析

探讨了桶形基础沉贯过程中负压引起的渗流场分布及其对桶壁与土体间的接触应力和摩擦阻力的影响。计算结果表明:负压沉贯过程中,桶内土体在离顶面约贯入深度一半的范围内产生负孔隙水压,该部分土体极易在负孔隙水压作用下发生破坏以至形成土塞;桶壁与土体间的接触正应力在沉贯过程中不断增加,并且与贯入深度成线性正比关系;负压主要减少桶壁内侧与土体间的摩擦力,而对桶壁外侧摩擦力无显著影响,因而,从整体上减少了桶体沉贯时所受的摩擦力。通过与求解沉贯过程中土体应力的解析公式进行对比,印证了本文计算结果的合理性,并提出了考虑初始应力的计算沉贯过程中桶-土接触应力的简化公式。     

建设监理知识分类研究

知识管理是提高我国建设监理行业创造价值能力的重要手段,知识分类活动是开展建设监理知识管理的基础。建设监理知识已有多种知识分类方法,但因未从知识管理视角分类,不能满足知识管理活动的要求。采用聚类分析方法,通过实证研究将建设监理知识划分修正为基础知识、规则知识和经验知识。提出了建设监理知识分布的不倒翁模型,即基础知识包含的四控知识较多,合同管理、信息管理和协调知识较少,隐性程度较低;规则知识包含的部分知识比较均衡,隐性程度适中;经验知识包含的协调知识较多,隐性程度较高。并提出监理工程师应改善知识结构、增加规则知识和经验知识,建设监理企业应加强知识管理能力,高等院校应改革教学内容,提高教学效果。     

中国权证市场理论价格与实际价格差异分析

中国权证市场近年得到了快速发展,但仍存在诸多问题,如何进行合理的价值评估就是其中一个方面。Black—Scholes期权定价公式作为期权定价的经典方法,其有效性在发达国家已得到验证。本文通过比较中国权证市场上交易品种的理论价格和实际价格的差异,并分析相关的影响因素,来为中国权证市场的追一步完善提出自己的建议。     

Accounting,Remuneration and Employee Motivation in the New Organisation

The paper draws upon two detailed case studies of global manufacturing companies to examine the role of accounting in redesigned remuneration systems which are emerging as organisations delayer their structures, change their production methods and move to team-based systems of work and reward. In this way, changes in the content and application of accounting measures are framed within new approaches to rewarding and motivating employees that have been stimulated by efforts to develop alternative, ‘leaner’ manufacturing practices. The focus is principally upon the remuneration of shopfloor employees, but we also consider the implications of team-based reward systems for managerial staff. We argue that despite the recent complementing of financial with non-financial forms of reward (e.g. skill acquisition, improvements to health and safety), and an emphasis upon peer pressure from team members in addition to individual incentives as a source of motivation, the language and calculations of accounting remain central and pervasive in developing, justifying and mobilising support for the new reward system.     

On discontinuous frequency functions of two variables

The theory of discontinuous frequency functions of one variable has been well elaborated, especially due to the important researches of Professor Steffensen ¹ See f. i. Steffensen: Matematisk Iagtagelseslære, p. 32 f. while the theory of discontinuous frequency functions of two and more variables has been almost neglected, in spite of the fact that all statisticians agree as to the importance of this topic.     

中西部地区大型流域生态补偿机制

为进一步提高我国中西部地区流域生态补偿机制的有效性和稳定性,利用拓展能值模型核算流域生态补偿标准,分析双维度机制分类框架机制类型,依据补偿方补偿意愿确定流域政府及其上级政府的补偿额分摊支付比例,并以汾河流域忻州段-太原段为例验证该机制的可行性。结果表明：中西部地区不协调的经济发展方式和当地大型流域复杂多样的生态环境加大了当地流域生态保护难度,应以生态价值为核心确定补偿标准,在流域政府补偿上级政府补差型机制下尽快设立专项资金并合理分摊支付补偿额,保障流域生态补偿政策的有效落地。     

杜仲不同炮制品配方颗粒的红外快速鉴别

为快速鉴别杜仲不同炮制品配方颗粒,建立了红外光谱法,结合二阶导数光谱及二维相关光谱法,分析不同炮制品配方颗粒的光谱特征。结果表明:杜仲不同炮制品配方颗粒的红外光谱基本相似,仅在1 603,1 514,1 420cm~(-1)处出现位置变化;在800~1 600cm~(-1)范围内,二阶导数光谱吸收峰有明显的强度、形状、位置变化;1 800~1 000cm~(-1)范围内,二维相关光谱差异明显。通过比较杜仲不同炮制品的红外光谱图、二阶导数光谱图及二维相关光谱图,可以准确、快速地鉴别杜仲不同炮制品配方颗粒。     

Using the Hicks formula to evaluate an estimate of the elasticity of derived demand for toll-free numbers

Duffy-Deno & Parsons D-D & P (2012) estimated the coefficient for the price elasticity of demand for toll-free numbers (TFNs) at between −0.04 and −0.05. Here, the Hicks formula for derived demand is used to check the range of likely demand elasticity for TFNs given the special characteristics of this market. This approach suggests that the demand for TFNs is likely not more elastic than estimated by D-D & P. Therefore, the premise is sound for D-D & P's discussion of the public policy implications of highly inelastic demand for TFNs. The use of industry information for all four parameters of the Hicks formula to check a derived demand elasticity is the first of its kind in the published literature.     

地基承载力理解和确定问题探讨

文章在阐述了地基承载力意义的基础上,对现行规范推荐的地基承载力确定方法,理论公式计算法和现场载荷试验法中存在的问题和局限性进行了分析。提出地基承载力的确定是一个非常重要而又十分复杂的问题,需要根据地质条件,基础及上部结构特点、结合理论计算、载荷试验的测试数据以及工程经验综合判断确定。