海洋综合执法模式的比较研究

海洋综合执法是克服海洋分散执法弊端的必然选择,目前我国海洋综合执法模式可以分为多元联合执法模式、一元统一执法模式和多元一体化执法模式,这三种模式在内涵和运行机制上都有显著区别,也各具自身的优势和不足,通过比较分析,可以为我们全面掌握海洋综合执法模式,以及在执法中如何选择海洋综合执法模式提供有益参考。     

基于资源基础观的中外合资企业绩效研究

根据资源基础观,中外合资企业建立的基本动因是为了克服各自资源限制而获得互补性资源。中外企业之间资源的互补性决定了合资企业资源的独特性,也决定了合资企业潜在的竞争优势和潜在绩效。在将合资企业潜在竞争优势和潜在绩效转化为现实竞争优势和现实绩效的过程中,母公司对资源的控制具有重要作用,资源控制的合理安排不仅有利于母公司独特资源向合资企业的有效转移,而且有利于资源在合资企业中价值创造功能的有效实现。     

Diversification,Performance, and the Corporate Life Cycle

This paper investigates the relation between the extent of diversification in firms and their performance at different life cycle stages. To illustrate the joint endogeneity of diversification and performance, we treat both the extent of diversification and firm performance as endogenous variables in a simultaneous equation system. Empirical results reveal that corporate diversification erodes firm value. Overall, firms in their growing stages experience a significant diversification discount; however, mature firms do not show such findings. Although unrelated diversification leads to trading at a discount in all growing and mature firms, conversely, related diversification exhibits an evident premium in mature firms.     

The assignment of call option rights between partners in international joint ventures

We examine call option rights as a contractual clause in international joint ventures (IJVs) and propose that the assignment of the call option right in an IJV is determined by certain ex ante asymmetries between the partners. Results show that between the two partners in an IJV, the firm with greater complementarity with the venture and greater prior IJV experience is more likely to hold the call option right; in addition, the firm's contractual choice on the call option right and its ownership choice on a greater initial equity stake are substitutive. Our focus on explicit call options advances the real options theory of collaborative agreements, and our results also highlight that option rights be considered an important part of alliance design. Copyright © 2013 John Wiley & Sons, Ltd.     

实时OD估计中卡尔曼滤波算法研究

ITS研究中，动态OD矩阵估计是交通动态分配的关键因素。针对OD矩阵难以获得的问题，回顾动态OD矩阵估计理论的发展历程，明确该领域研究中的三个关键问题：状态变量的选择、系统方程的确定、OD量与路段流量的关系（分配矩阵）。在此基础上介绍一种基于历史OD矩阵数据的估计方法，卡尔曼滤波算法，为动态OD矩阵估计理论的进一步的研究奠定基础。     

低复杂度的连续相位调制与LDPC联合迭代译码算法

连续相位调制与低密度奇偶校验(LDPC)码编译码技术在提高频谱利用率的同时能够有效降低发射功率,然而这会增加通信系统的复杂度。为此,提出了一种低复杂度的联合迭代译码算法解决此问题。该算法以符号/比特的可靠度作为内外译码器之间的迭代信息。仿真结果表明,新的联合迭代译码算法的性能与概率域下的算法几乎没有差异,在总迭代次数相同的情况下,采用低复杂度联合迭代的性能相比于未采用联合迭代的性能有约0.75 dB的增益。     

Intended and unintended termination of international joint ventures

This study proposes that international joint ventures (IJVs) are terminated either when the initial purposes of the formation of the IJV have been achieved (intended termination), or when unanticipated contingencies that emerge in the external, internal, or inter‐partner conditions after the establishment of the IJV impede the continuation of its operation (unintended termination). Our study examines the factors that affect intended and unintended termination and the longevity of IJVs. The findings show that approximately 90 percent of all IJV terminations are unintended and 10 percent intended, and that the frequency of intended termination and unintended termination varies noticeably depending on the initial purposes of formation. This suggests that the termination of IJVs is significantly contingent on their formation. The findings also show that the longevity of IJVs varies according to the initial purposes of formation, the initial conditions under which the IJV is formed, and the types of unanticipated contingencies that it encounters. The key theoretical issues and practical implications of the distinction between the intended and unintended termination of IJVs are also discussed. Copyright © 2007 John Wiley & Sons, Ltd.     

Inter‐firm R&D collaborations and green innovation value: The role of family firms' involvement and the moderating effects of proximity dimensions

The present paper investigates the relationship between the involvement of family firms in R&D collaborations aimed at developing green solutions and the value of resulting innovations. To dig into this relationship, the moderating effects of two proximity dimensions (i.e., geographical distance and technological relatedness) are also assessed. Analyses are based on a sample of 156 joint patents classified into the “Alternative energy production” field, as defined by the International Patent Classification Green Inventory and successfully filed at the United States Patent and Trademark Office in the period 1997–2010 by publicly listed companies. According to our conjectures, results reveal a positive relationship between the involvement of family firms and green innovation value. Moreover, our findings show that this relationship is hindered when partners are geographically distant or technologically proximate. Eventually, we contribute to the literature on green innovation by unveiling under which conditions inter‐firm R&D collaborations lead to more valuable innovations.     

实时宽带示波器在快沿脉冲测量中的应用

脉冲信号的广泛应用使得对其测量准确度提出更高要求,而脉冲信号上升沿变窄的趋势则增加了测量难度。为了更精确地测量脉冲信号并保证测量结果准确可靠,分析了高性能实时宽带示波器在带宽、采样率、底噪、电缆去嵌和匹配校准快沿脉冲等方面的优点,讨论了其用于脉冲信号测量和校准所具有的无可比拟的精准性,说明了其作为脉冲信号测量和脉冲参数计量具有无可替代的作用。最后通过一个实例介绍了对10 ps以内快沿脉冲进行测量和校准的方法。     

远程自动抄表系统在取水计量实时监控中的应用

当前,我国经济正处于快速增长期,用水量大幅度增长,水资源供需矛盾突出。文章以广西来宾市远程自动抄表系统在取水计量实时监控中的应用为例,从战略上分析了做好节水工作的重要性。