天平横向刀盒“综合”调修法

本文重点介绍了天平横向刀盒,在调修平面性、平行性、等臂性的基础上,加以"综合"性调整,使几个性能同时达到合格点,省时省力,优质高效的完成天平计量性能的调修。     

Detecting origin fraud with trade data: the case of U.S. honey imports*

Following the 2001 U.S. imposition of antidumping tariffs on imported honey from China and Argentina, industry press noted patterns of trade suggesting that honey was being transshipped to circumvent tariffs, origin fraud that was later uncovered in criminal cases. This article presents three approaches that use trade and production data to flag countries for possible instances of origin fraud and then compares these countries with those implicated in criminal cases and media reports. In our preferred empirical method, we also find that countries with higher corruption scores are more likely to show increases in suspicious trade patterns following the tariffs.     

A question of top talent? The effects of lateral hiring in two emerging economies

On the basis of a qualitative study in two emerging economies, we advance the literature on lateral hiring by developing an integrated phase model to explain how the effects of lateral hiring unfold to affect the originating firm and its employees. Our work uncovered two types of effects on the originating firm, i.e. first-order and second-order effects. Our stage model elucidates how the psychological and emotional effects are manifest to affect the existing employees. Personnel poaching appear to have triggered the quest for meaning and attempts by the existing employees to enhance their visibility, career adaptability and marketability. We discuss implications for practice, theory and research on lateral hiring.     

Itemized platelet supply chain with lateral transshipment under uncertainty evaluating inappropriate output in laboratories

Demand uncertainty coupled with the short lifespan of itemized platelets has caused a significant shortage at public therapeutic centers. In this regard, this paper presents a multi-objective robust stochastic mixed integer linear programming model for an integrated platelet supply chain considering unidirectional lateral transshipment between hospitals and clinics. In the proposed model, platelets are divided into typical, irradiated and washed platelets with lifespan differentiated for various types of patients. This model evaluates the risk of inappropriate production by concentrating on three different procedures for extracting platelet, including apheresis, platelet rich plasma and buffy coat methods. In this investigation, staff errors, laboratory hygiene and device failure, as well as donors' blood contamination, are considered for obtaining the function of inappropriate production rate. In our model, the logistics costs are considered as the first objective and the maximum unsatisfied demand as the second objective, both also to be minimized. To tackle demand uncertainty, a robust stochastic approach is then developed. Afterwards, to create a more realistic model, the Monte Carlo sampling approach is used for generating required scenarios. Finally, some managerial insights are provided through a real case study to evaluate the applicability of the presented model. The results indicate that the proposed model not only improves the demand satisfaction but also reduces the risk of itemized platelets wastage.     

A pragmatic decision model for inventory management with heterogeneous suppliers

For enterprises, it is imperative that the trade-off between the cost of inventory and risk implications is managed in the most efficient manner. To explore this, we use the common example of a wholesaler operating in an environment where suppliers demonstrate heterogeneous reliability. The wholesaler has partial orders with dual suppliers and uses lateral transshipments. While supplier reliability is a key concern in inventory management, reliable suppliers are more expensive and investment in strategic approaches that improve supplier performance carries a high cost. Here we consider the operational strategy of dual sourcing with reliable and unreliable suppliers and model the total inventory cost where the likely scenario lead-time of the unreliable suppliers extends beyond the scheduling period. We then develop a Customized Integer Programming Optimization Model to determine the optimum size of partial orders with multiple suppliers. In addition to the objective of total cost optimization, this study takes into account the volatility of the cost associated with the uncertainty of an inventory system.     

Study of cooperation models of supply chain based on profit maximization

As is known to all, the main profit source of supply chain is derived from the improvement of relationships among enterprises. In order to maximize the profit of supply chain, longitudinal and lateral relationships among the enterprises are comprehensively analyzed, under which the supply chain profit is compared. The result indicates that the cooperation is more propitious to the profit enhancement than pure competition. Finally the optimal relationship among the enterprises is established.     

Do Investments in Specialized Knowledge Lead to Composite Good Industries?

We try to understand why firms producing goods by means of complementary components do not merge, especially in industries in which investments in component-based knowledge matters. As Audretsch, we state that these activities are developed by “individuals” who do their best to appropriate the return from their knowledge and whose effort is non-contractible. The organization of the industry into firms is identified to a partition of the set of individuals. In this context, we prove that an organization in which each individual hold his own firms is both stable with respect to unilateral deviation and optimal in the line of the property right approach. If the returns are high enough, this structure is even the only one which shares both properties.     

横向课题：高职院校科研的主攻方向

高职院校肩负着培养面向生产、建设、服务和管理第一线需要的高技能人才的使命。“校企合作、产学研结合”是提高高职院校办学质量的主要途径。高职院校的特性决定了科研工作要把主攻方向摆在横向课题上。要推动横向课题的发展,需要各个部门齐心协力,建立一系列激励机制。     

桩-土-桩相互作用有限元接触分析

桩土体作为一个共同工作的系统,广泛存在于土木工程实践中,是典型的接触问题之一,对桩-土-桩相互作用的研究也是工程十分关心的,其中桩身摩阻力的分布更是关键所在。本文基于有限元数值分析方法软件对此进行了深入研究。     

跨铁路50mT梁架设关键技术研究

文章针对跨铁路线50mT梁架设中面临的梁体易失稳、施工空间受限等难题,结合广东黄岐互通式立交桥施工实践,介绍了采用具良好经济效益的无前牵引鼻梁和无后平衡压重短导梁架桥机的新颖架梁方法,详细讨论了T梁运输、架设操作步骤、施工设备、临时支墩设置及双片横移等关键技术,对复杂施工条件下同类型桥梁构件的安装施工具有参考价值。