关于互不相关两动点相对加速度问题的探讨

文章对互不相关两动点的相对运动问题,提出了新的看法,并给出了两动点相对加速度的计算方法和计算通式。     

Some Cambridge reactions to The General Theory: David Champernowne and Joan Robinson on full employment

This essay analyses early reactions put forward by Cambridgeeconomists David Champernowne and Joan Robinson to J. M. Keynes'streatment of the labour market in The General Theory. Champernowne'sand Robinson's critical reactions represented attempts to fillthe gap of the determinants of changes in money-wages, whichthey both identified as a weak spot in the argument of the book.They rejected, albeit for different reasons, Keynes's notionof the point of full employment as an upper limit defined bythe equality between the real wage rate and the marginal disutilityof employment. Instead of Keynes's taxonomy of types of unemployment,Champernowne and Robinson introduced, respectively, the conceptsof ‘monetary employment’ and ‘monetary unemployment’,and of ‘critical levels’ of employment.     

组织因素对新产品开发绩效影响的理论与案例研究

组织文化、资源相互协调与配合、产品开发组织架构等组织因素是新产品开发绩效的关键因素。海尔洗衣机产品的开发,创建了面向市场的组织文化与资源共享的平台,在新产品开发团队中,推行模块经理与型号经理相结合的新产品开发组织架构,较好地兼顾了产品开发中的市场、技术、成本三个维度,提高了新产品开发绩效,创建了高绩效的新产品创新模式。     

客户知识管理能力对新产品开发绩效影响的实证研究

本研究分析客户知识管理能力（CKMC）对新产品开发绩效（NPD绩效）的影响,讨论产品创新程度的调节作用,并探索组织文化和组织结构的驱动作用,提出CKMC对NPD绩效影响的概念模型。最后以制造业为调研对象做实证分析,结果表明：客户知识管理能力对新产品开发绩效具有重要显著影响;在中国背景下,信任和合作的组织文化有助于提升客户知识管理能力和新产品开发绩效;集权化和形式化的组织结构不利于客户知识管理能力的提升,但有利于新产品开发绩效的提高;中国的制造业的产品创新能力亟待提高。     

Alliance-Based New Product Development Success: The Role of Formalization in Exploration and Exploitation Contexts

Purpose: Although alliances offer tremendous strategic potential, firms still struggle to successfully manage new product development alliances (NPD alliances). A prominent explanation for this is the institutional economics' view (see Williamson 1985 Williamson, O. E. 1985. The economic institutions of capitalism: Firms, markets, relational contracting, New York: The Free Press.  [Google Scholar]) that, in general, a key disadvantage of alliances versus vertical integration is that administrative control mechanisms are weaker. Here, a key control mechanism is formalization (the use of explicit rules to govern business activities).

However, regarding formalization's influence on both NPD and alliance performance, conceptual views and empirical findings are mixed, which suggest that unexamined variables moderate formalization's influence on NPD performance.

Therefore, it is surprising that there is no research on whether formalization's influence differs in alliances pursuing an NPD exploration strategy versus an NPD exploitation strategy because both (1) require varying levels of freedom of action and adherence to procedural rules to achieve success, and (2) are extensively employed in NPD.

Further, there is also surprisingly little intrafirm NPD and non-NPD alliance research on formalization in exploration and exploitation contexts because here as well formalization's influence on performance (1) is central, and (2) differs based on the project's innovative and learning intent.

The purpose of this research is to begin to close important literature and industry practice knowledge gaps about formalization's influence on NPD alliance performance in exploitation versus exploration strategic contexts.

Originality, value, and contribution: This research is the first examination ever of two key NPD strategies—exploration and exploitation—in an NPD alliance context. The research sheds light on conflicting views about formalization's NPD performance-enhancing and inhibiting aspects, and offers implications for industry best practices.

Methodology/approach: Empirical examination of survey data from 151 NPD alliances via hierarchical regression and tests of group moderation.

Findings: Results shed light on when and why formalization moderates the influence of key fundamental alliance success mechanisms on NPD alliance performance based on strategic context.     

基于F2806平台步进电机升降速设计

步进电机作为一种位置精确的运动控制单元,在工业控制领域获得广泛应用。但是步进电机启动与停止的开始瞬间会产生失步或过冲,文章提出一种线性的加减速算法,采用相对简单的数学运算实时的计算参数,替代了传统的查表法。直线型加减速算法在Matlap7.0平台与TMS320F2806平台功能实现后并应用到铺布机两轴控制系统,取得了较好的实验效果。     

创业企业韧性如何促进新产品开发？——资源保护理论视角下的单案例研究

为解析创业企业韧性与新产品开发的逻辑关系,在依据资源保护理论基础上,构建"资源交互-韧性生成-开发绩效"的理论框架,探索情境刺激和资源保护双因子情景下,企业韧性对新产品开发不同阶段的作用机理.结果表明:为避免机会识别期较低资源保护因子和较高情境刺激因子,在产品设计期创业企业通过双向资源交互生成以团队韧性为特征的企业韧性,产品开发绩效较低.从产品设计到产品测试期,创业企业建立双向和网状式并举的资源交互模式以降低情境刺激因子,产品开发绩效较高.从产品测试到发布期,创业企业通过网状式资源交互集聚企业战略核心资源和调配生成企业韧性,在降低情境刺激和资源保护的同时,保持高的产品开发绩效.