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1.
ctures and     
volume, the method of channelization, one-way traffic, signal control and other traffic engineering facilities are adapted in this paper. The traffic organization scheme of these in central business district of Humen Town,three intersections has been discussed, which can simplify intersections and improve traffic order.traffic organization;intersection;central business district0广东交通职业技术学院学报Journal of Cuangdong Communications Polytechnic26-29U491C03425C;C034_25麦婉菁;21-24广东省高速公路沥青面层矿料级配设计探讨邱启明;刘伟明;湖南益阳市交通局,广东交通职业技术学院 湖南益阳413000,广东广州510650沥青面层;;矿料级配;;设计;;室内试验论述了沥青面层混合料配合比设计的技术要求,根据当地的料源,设计了三种不同的矿料级配曲线,通过室内大量试验,对试验检测的各项技术指标比较,确定沥青面层矿料的最优级配曲线。Exploration on Guangdong Provincial Expressway Asphalt Surface Course Mineral Aggregate Gradation DesignQIU Qi-ming1,LIU Wei-ming2 (1. Communications Bureau of Yiyang City ,Yiyang 413000,China; 2.Guangdong Communications Polytechnic, Guangzhou 510650,China)This paper discusses the technical requirements of asphalt surface course mixture design.According to sources of local materials,three different mineral aggregate grading curves are designed.Through extensive indoor testing of the asphalt mixture and various qualification contrast to determine the optimum asphalt surface aggregate grading curves.asphalt surface course;mineral aggregate gradation;design;indoor test0广东交通职业技术学院学报Journal of Cuangdong Communications Polytechnic30-32+74U416.217C03422C;C034_22邱启明;25-27+69道路设计安全问题研究赖香忠;方雄师;广东省公路管理局,广东粤路勘察设计有限公司 广东广州510075,广东广州510635道路设计;;安全问题;;研究道路设计对公路交通安全有着非常重要的影响。文中从平面交叉口设计、视距问题、平纵线形与平纵组合问题、交通安全设施等方面探讨了道路设计的  相似文献   

2.
More than 3,000 representatives from more than 80 countries and regions will attend the 15th World Petroleum Congress in Beijing. They will discuss new petroleum science and technology achievements, as well as the opportunities and challenges facing the petroleum industry in the next century. This meeting will promote international exchange and cooperation in petroleum science and technology thereby helping the world petroleum industry develop more quickly. As technology and globalization lead the petroleum industry into the 21st century, China's petroleum science and technology also will enter the new century with a new look.  相似文献   

3.
This paper describes the development of the design and technology component of the National Curriculum of England and Wales from its inception in 1988 to its current form in 1995 and the influence of the Nuffield Design and Technology Project in this process. The paper discusses the Nuffield approach to four important issues – breadth and balance, continuity and progression, differentiation and clarity of content. The paper discusses the role of the teacher and identifies four important features required for successful teaching. The paper describes the work of the Project in providing continual professional development for design and technology teachers including the work of area field officers to support teachers who are using the Project publications. This revised version was published online in August 2006 with corrections to the Cover Date.  相似文献   

4.
We study firms’ choices between online and physical markets with respect to product quality and competition, and examine consequences of transparency policies on price competition and market structure. We investigate two contrasting forces. First, since consumers cannot fully inspect an online product’s quality prior to purchase, conventional wisdom and some of the literature suggest that this attracts low-quality products to the online market (a pooling effect). On the other hand, the literature on vertical product differentiation indicates that a firm with a lower-quality product may prefer to reveal its product quality in the physical market because quality differentiation helps alleviate price competition (a differentiation effect). We show that an entrant firm with product quality lower than that of the offline incumbent may choose the physical market, whereas the entrant with a quality higher than the incumbent’s may sell online. More generally the two contrasting forces can give rise to a wide range of product quality—from low-end to high-end—in both markets.  相似文献   

5.
We consider a signaling model capturing the introductory and the mature phase of a product. Information concerning product quality is transmitted between consumers through reviews, which partially depend on the expectations consumers had prior to their purchase. When future sales are sufficiently important, a novel tension arises: High-quality types may want to underpromise and overdeliver by imitating low types in order to get a better review. We show the existence of a Pareto-improving separating equilibrium. Both more informative reviews and price transparency can lead to higher prices. Our analysis reveals a new rationale for loss-leadership.  相似文献   

6.
This article discusses the theoretical and conceptual foundations for the co-management of purchasing and marketing and thereby provides some answers to the questions, why, when and how purchasing and marketing should be co-managed. It develops a conceptual framework distinguishing between internal and external co-management of purchasing and marketing. Improving value creation and value capture is identified as a necessary “pull factor” driving the co-management of purchasing and marketing. Based on resource dependence theory (RDT), we argue that dependence on critical resources is another important “push factor” for the emergence of external co-management. We present a RDT-based typology of co-management constellations showing that co-management is not a one-size-fits-all approach and summarize our findings in five propositions on the co-management of purchasing and marketing. In sum, we conceptualize co-management of marketing and purchasing as a bridging strategy that allows a focal firm to accommodate dependence on critical upstream and/or downstream resources and improves value creation within the supply chain.  相似文献   

7.
《Food Policy》2003,28(4):349-363
This paper argues that research and extension have failed to (1) develop technologies that take into account farmers’ resource constraints and risks; and (2) improve farmers’ capacity to adapt technologies to their own situations. The paper critiques continued use of blanket, high-dose fertilizer recommendations, arguing for approaches that teach farmers how to maximize returns from smaller, more affordable input purchases. Developing such technologies requires that researchers integrate a wider range of stakeholders (farmers, extension agents, agricultural exporters and processors) into research activities at an earlier point in time than has been the case. Although evidence that these new approaches are increasing the use of purchased inputs remains weak, a number of important lessons are emerging about how research and extension outcomes are influenced by institutional culture and incentives. The authors conclude that developing recommendations for small, affordable input doses and training farmers so they can adapt recommendations to their particular circumstances is as much an institutional challenge as a technology challenge.  相似文献   

8.
For the China garment industry, 2005 was certainly moody and unpredictable. She put a full stop on quotas, witnessed the frowning over trade issues between China and the US and EU, she also told the world that Chinese Yuan would be revalued by only two percent. After a rough path Chinese clothing industry still managed to raise rice wine shots and sing proudly down the karaoke.  相似文献   

9.
The phenomenon of the international Industrial Marketing and Purchasing Group (IMP Group) is, that despite the fact that it is informal in character, it has been possible to build close and lasting relationships between many researchers from all continents who have been developing their research over the last 40 years.The research carried out in the beginning by the IMP Group was very phenomenon-driven in character. Researchers associated with the IMP Group were linked because they viewed companies as being a network of interdependent entities and this view was commonly described in literature as the IMP network approach. Change is a fundamental assumption embedded in the network approach. Changes occurring in networks are caused by interdependency, interactions and mutual adaptation.The issue of change and transformation is important not only due to the aforementioned nature of the IMP network approach, but also due to the need to take into consideration new phenomena appearing and/or gaining strength in the context of company networks, technological changes facilitating the development of direct relationships on the business to consumer market, the change in the behaviour of a range of market leaders, based upon vertical integration, a change in the position of entities, which to-date have been peripheral within the network (e.g. subcontractors), the development of technology and global communication networks influencing a firm's ties within the internationalisation process, ever-growing competition drives the need to look for the actual impact of the overall relationships of a company on its economic performance. Referring to these issues this article serves to announce the 32nd Annual IMP Conference that will be held in Poznań, Poland, this year where discussion will focus on change and transformation of networks and relationships.  相似文献   

10.
About usThe centre is located opposite to the south gate of Sun Yat-San University inGuangzhou. It has 300,000 square meters of building area with nine floors and morethan 4000 shops. This 'one D stop' centre combines selling and buying, business trading,exhibitions and exchanging resources, and with excellent facilities and customerservices, China Fabrics and Accessories Centre (CFAC) is one of the biggest and high-est standard super modern business centres for trading textiles in Asia.…  相似文献   

11.
12.
We consider two different qualities of broadband access, one that simply means greater access speed to Internet applications and content, and a premium version that also gives access to interactive TV services. Based on a market survey we find that potential consumers of this premium broadband access do not consider basic broadband Internet access as a substitute. The price of basic broadband does not constrain the price that may be charged for the premium broadband that allows for interactive TV services.  相似文献   

13.
Asian economies display large evident differences in their entrepreneurial capabilities and performance. While existing explanations of these differences have largely focused on formal and informal background institutions, we instead emphasize differences in national stocks of venture forms. We suggest that alternate venture forms, because of their different governance characteristics, possess unique entrepreneurial capabilities and pursue distinct opportunities. Consequently, nations must possess a diverse and balanced stock of venture forms and have such forms engaged in the unique and complementary activities for which they are best suited. Viewed in this light, addressing national limitations in entrepreneurial performance requires changes in stocks of venture forms. In developing the policy implications of our analysis, we highlight the past successes and current development challenges of Japan, Korea, Singapore, Hong Kong, Taiwan, and mainland China.  相似文献   

14.
The impact of national legislative frameworks on the higher education sector's contribution to technological innovation is heavily disputed. This paper argues that legislative frameworks may stimulate the development of local practices for the management and exploitation of intellectual property (IP), which in turn determine the level of academic patenting. We present case studies of two comparable universities in each of four selected European countries with different histories of national IP legislation. A within-country analysis shows that a wider range and earlier development of local IP management and exploitation practices are accompanied by higher levels of academic patenting, and that increasing similarity of IP practices is associated with decreasing differences in patenting outputs. A preliminary cross-country analysis reveals an expansion in and increasing similarity of practices for IP management and exploitation in countries with different national IP framework histories. We conclude that adopting Bayh-Dole-like legislation may trigger the development of local IP practices, which stimulate patenting. However, it is not always sufficient and definitely not always necessary. The study concludes with some policy recommendations.  相似文献   

15.
This article introduces the Special Issue of Managing Business and Innovation Networks and makes an independent contribution to the advancement of network management research. The study has three ambitious goals. First, it evaluates the main developments in network management research from 2000 to 2016, focusing on disciplinary openings. Second, it specifies the contributions of recent domain extensions (business fields, ecosystems, platform networks) to network management, and clarifies the role of networks and network management in these domains. Third, it proposes a general theory of network management based on the past 20 years of research in the field and the contributions of SI articles. The theory explains how the factors at three contextual levels – environment, network and actor – influence network management activities, forming patterns of management based on activity configurations. The framework consolidates our fragmented knowledge on network management and paves the way for more advanced research and management. We conclude with suggestions for future research.  相似文献   

16.
Changes are being sought in Canada's telecommunications services which would deregulate the industry and result in reduced long-distance telephone rates and increased local charges. This article examines historical data on telephone rates and penetration, and contemporary evidence on the results of telephone industry changes in both Canada and the USA. The authors argue that such changes would benefit business users and harm residential users. They would challenge Canada's long-term commitment to universal telephone services — an ironic development in an information age where access to electronic technology is becoming essential for daily life.  相似文献   

17.
I investigate the impact of innovative work practices and information and communication technologies (ICT) use on employees’ motivations. The paper provides new and interesting results on how firms can build a motivational environment. Within an original instrumenting framework, I modify what previous analyses reveal about quality circle and training participation. The results confirm the positive role of work practices such as teamwork, quality norms, formal appraisals, management recognition, and family‐friendly policies. The ICT that most contributed to the development of a motivational environment are those that facilitate access to information and knowledge such as workflow, Internet, and e‐mail.  相似文献   

18.
Research summary: Pre‐entry industry experience is a central construct in the founding team literature. Research on prior shared experience (PSE) emphasizes that founding teams face challenges integrating and acting on independent experiences, so PSE should be beneficial for new venture performance. Existing studies, however, typically study PSE in blunt terms, expecting that more is better. Instrumental variable analyses of a unique sample of 344 commercial banks founded in four U.S. states between 1996 and 2006 showed that industry‐specific PSE may be more or less beneficial, depending on several founding team characteristics. Our findings provide nuance and caution to the narrative that PSE is always beneficial. Under some circumstances, firms with founding team PSE may be no better off than those without founding team PSE, suggesting more research is necessary to understand when and why founding team experience matters to new firms. Managerial summary: Pre‐entry experience of founding teams affects new firm performance, but is hard for founders to leverage separately gained experience. Knowledge moves more readily if sets of managers leave together to start a new firm. But, it may be simplistic to conclude that prior shared experience (PSE) is always good, or better than the sum of independent experiences. In a set of banks founded in four U.S. states between 1996 and 2006, we find that PSE is not necessarily a direct pathway to better bank performance. Characteristics of the PSE, such as the part of industry the former and new banks operate in, can lower its benefit. We also found that the benefits of PSE erode as the entire founding team develops shared history after startup. Our findings have implications for entrepreneurs, investors, and policy‐makers. Copyright © 2015 John Wiley & Sons, Ltd.  相似文献   

19.
Inasmuch as design is a central activity in K-12 engineering education, understanding the students’ motivation during engaging in engineering design activities will help educators to develop and evaluate strategies for engineering design challenges, and improve curriculum. The objective of this study is to better understand the relationship between students’ interest and expectancy for success while engaged in two design activities in grades 9–12. The primary difference between the two activities was the strategy used to solve the design problems from a predictive analysis and a creative approach. Constructs of motivation for students’ interest include task value (TV) and intrinsic goal orientation (IGO) and extrinsic goal orientation (EGO). Expectancy for success includes control of learning beliefs and self-efficacy for learning and performance. In this study, students (n = 31) from three high schools that implement the Project Lead the Way curriculum in three states in the US participated in the study. Immediately after completing their design projects, each student was asked to complete a modified version of the Motivated Strategies for Learning Questionnaire survey instrument which evaluates their interest and expectancy for success. The results show that students were more intrinsically motivated to engage in a design activity that involves a predictive analysis than a creative approach. No significant correlation was found between students’ expectancy for success and EGO in design tasks that utilized either predictive analysis or creative approach. The study also found that TV and IGO were good predictors for students’ expectancy for success. Demographic information associated with students’ motivation in the design activities is also presented.  相似文献   

20.
The global geographical balance of food and agricultural R&D spending is shifting, characterized by a declining U.S. share and a rising middle-income-country share, propelled heavily by the rapid rise of spending in China. Based on our newly compiled data, we estimate that China now outspends the United States on both public and private food and agricultural research on a purchasing power parity basis. The public-private orientation of the research has also changed markedly, with the private sector now accounting for around two-thirds of the food and agricultural R&D spending total in both China and the United States. Our estimates indicate that China’s private sector tilts heavily towards post-farm R&D activities, whereas the U.S. private sector is split more evenly between on-farm and post-farm spending. While the intensity of Chinese investment in food and agricultural R&D (relative to agricultural GDP) is beginning to grow, it still lags well behind the food and agricultural R&D investment intensities of the United States and other higher-income Asian countries (e.g., Japan and South Korea). The development regularities we reveal in the longer-run trends are indicative of future R&D investment patterns with potentially profound long-run implications for the size, shape and accessibility of the global stocks of scientific knowledge that underpin food and agricultural sectors worldwide.  相似文献   

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