防恶意干扰的VANET双群联合定位算法

传统的无线定位方法直接应用于车辆自组织网络(VANET)时，会被窃听方利用定位信息，从而导致严重的安全隐患。为此，提出基于Bancroft方法的双群组合定位算法,用于保障车辆自组织网络中车辆定位的安全性和准确性。算法利用两个群组的智能车辆节点分别进行定位，利用两组解分别反求伪距值，如果所获得的伪距值与经过节点钟差修正后的原始伪距值基本一致，则认为这一组解为最终的定位结果，从而保证了定位的正确性。同时，双群定位的信息分散性保证了系统整体的安全性。理论分析及算法仿真表明,双群联合定位算法可使窃听方的误码率稳定在较高水平。     

Effects of service orientation on job embeddedness in hotel industry

This research aims to develop and analyze a model that depicts work engagement (WE) as a mediator of the relationship between job embeddedness and service orientation. Specifically, the model examines external environmental factors (EEFs) as moderator of the effects of service orientation and job embeddedness in the hospitality industry. All data used for this study were gathered in Iran from hotels frontline employees with a two-weeks’ time lag. These relationships mentioned above were analyzed using AMOS 22.0. It was discovered in the results that WE was indeed a partial mediator and that EEFs indeed moderated the effects of service orientation on job embeddedness with adequate empirical support. The implications of the findings for the managers, the study limitations, and future research recommendations were also discussed.     

Employee involvement and participation: developing the concept of institutional embeddedness using WERS2004

It is widely accepted that employee involvement and participation (EIP) is a key component of the high commitment bundle of HRM, but that it can take a range of forms in practice. Much of the analysis to date has either treated different forms of EIP as a single construct or has measured EIP by virtue of its presence or absence alone. Drawing on earlier work based on the data from WERS1998 examining the link between various forms of EIP and employee outcomes such as job satisfaction and organisational commitment, the authors re-apply and extend these ideas to data from WERS2004. In particular they develop the concept of institutional embeddedness, in order argue that both the depth and breadth of EIP have important associations with commitment though not with satisfaction.

This association held for workplaces employing 25 or more workers, and here it was apparent that the more that employees are involved at workplace level – through a wider number of EIP practices that are held more frequently and include opportunities for workers to have their say – the more likely it is that investments in EIP will reap the reward of organisational commitment. For smaller establishments, given that they tend to operate with relatively few formal schemes, it is likely that managers in these workplaces find alternative ways in which to engage the workforce, and that informal EIP offer similar levels of embeddedness in these situations. A clear implication to be drawn from the findings is that, in a context of lower levels of formality within organisations (large and small), line managers are more than ever the key link between HR policy and the embodiment of actual practice at the workplace.     

高职软件技术专业"双证制"课程改革

根据信息产业对软件技术人才的需求状况,分析了软件技术专业的就业方向和应具备的职业能力,指出了专业的核心课程,并从我国高等职业教育课程改革入手,提出了具体的软件技术专业外包和测试两个方向双证制课程改革的解决方案。     

文化嵌入、网络行为与集群企业创新台皂力的关联机制研究——理论分析框架与命题

经济行为嵌入在社会关系中，主体的行动是受背后的动机和意愿支配的。本文在进行相关文献回顾的基础上，从区域文化产生来源出发，归纳提炼了区域文化的内吝维度，并基于资源依赖理论，从文化嵌入的内容和程度两个方面，提出了文化嵌入作用于集群企业创新能力的一个系统分析框架，即嵌入于不同内容和程度区域文化的集群企业，其网络建构、网络维系和网络学习行为具有重大差异，进而使自身对网络资源的获取和利用水平上存在着差异，并最终导致企业的创新能力水平截然不同。在此基础上，形成了一系列有待未来实证检验的文化嵌入作用机制的命题。     

广播供电系统内高压柜双电源自备投装置的故障处理和分析

随着广播电视工程的扩建升级,高科技广播电视导航设备得到了普及应用。供电系统在供应设备电能使用方面的作用越来越显著。现代广播电视供电系统要求开关柜保持良好的功能状态,设置自检测或自报警功能模块,提前发出系统感应到的异常信号。     

Effects of Network Embeddedness on the Relationship Between Environmental Volatility and Interfirm Contracts

Purpose: This study examines the effects of an embedded network on the contractual relationship between exchange parties under conditions reflecting varying levels of environmental volatility and investigates the role of an important network factor—the embedded network—in the contractual relationship between manufacturers and their suppliers.

Methodology: The empirical test was conducted with manufacturing companies in the context of manufacturer–supplier relationships. Construct measures were based on existing measures and previous research. Measurement reliability and validity were established using exploratory and confirmatory factor analysis and an overall measurement model was assessed with structural equation modeling using LISREL.

Findings: The results of a survey of manufacturers indicate that firms in an embedded network preferred “soft” contracts even when they face volatile environments, whereas those facing volatile environments in a less embedded network preferred “hard” contracts with explicitly specified written requirements. Network partners carefully evaluated embedded networks (a critical factor that has not received enough attention) before forming contractual relationships in a network perceiving interfirm relationships differently.

Originality: The study introduces network embeddedness to explain governance mechanisms in volatile environments and shows that the explicit recognition of embedded network may facilitate the development of contracts with specific provisions as the contractual relationship evolves.     

An empirical investigation of director selection in movie preproduction: A two-sided matching approach

This paper examines how movie producers recruit directors in the preproduction phase as mutual choices in a two-sided matching model. It conceptualizes that movie attributes and filmmaker characteristics determine the matching outcomes (“who directed which movie”) and in turn indirectly affect movie box office. We exploit a dataset of 4,807 feature films from 1990 to 2010 to examine empirically the complementarities between the movie/producer side and the director side in terms of movie budget, filmmaker track records and social relations. A series of simulations suggest that social relations facilitate positive assortative matching. Further simulation analyses are conducted to quantify the financial implications of movie–director mismatches, as well as the indirect effects of production budget and producer characteristics. The simulation results show that: a) the financial implications of having a mismatched director can be substantial; and b) the indirect effect of production budget and producer characteristics affect movie box office in an interactive manner. These findings can help filmmakers to better understand the financial impacts of movie–director choices and make more informed decisions at the early phase of preproduction.     

农民工动态演化研究

本文通过对二元经济结构刚性对农民工的约束以及伴随我国相关政策调整而出现的农民工回流分析,说明了农民工动态演化,并提出了促进农民工合理、有序流动机制的相关政策建议。     

旅游产业发展与居民消费结构——基于1994～2009年经验数据

旅游产业的发展和居民消费结构有重要的关联,研究居民消费结构的变化对旅游产业的发展具有十分重要的意义。通过对1994～2009年旅游消费和居民消费结构有关数据的分析,发现我国旅游消费的增长速度在不断放缓,导致旅游产业的发展可能面临瓶颈。城乡二元结构对旅游消费有重要影响,城镇居民旅游消费降低与住房、医疗和教育等支出有关,农村居民旅游消费可能会发展为新的增长点。