单片开关电源的原理及应用

TOPSwitch系列三端单片开关电源集成电路是由控制电压源、带隙基准电压源、振荡器、脉宽调制器等部分组成的。其工作原理是利用反馈电流来调节占空比达到稳压目的。在光电反馈式开关电源中由于增加了光电反馈电路 ,使输出电压的精度与调整率均得到明显提高。 TOP1 0 0系列还能构成固定频率、非连续式功率因数校正升压预调节器 ,可用于提高功率因数、降低无功功率、减少谐波及防止输出波形失真等作用。     

Option pricing in the presence of natural boundaries and a quadratic diffusion term

This paper uses a probabilistic change-of-numeraire technique to compute closed-form prices of European options to exchange one asset against another when the relative price of the underlying assets follows a diffusion process with natural boundaries and a quadratic diffusion coefficient. The paper shows in particular how to interpret the option price formula in terms of exercise probabilities which are calculated under the martingale measures associated with two specific numeraire portfolios. An application to the pricing of bond options and certain interest rate derivatives illustrates the main results.     

对西部基层商业银行提高经济增加值的思考

实施以经济增加值为核心的绩效考核,在金融资源匮乏的西部欠发达地区,基层行面临着经营核心目标与业务计划体系的统一、经营效益增长与市场份额增长的关系、产品定价机制问题、相对单一的信贷资产结构与降低经济资本占用、财务核算体系中业务风险体现不充分等两难选择。西部基层行必须从转变经营理念,完善组织结构,构建与完善管理信息系统、业绩评价系统、部门预算等方面创造条件为推行经济增加值奠定基础。在经济资本约束下,西部基层行在经营管理工作中要牢固树立价值最大化的经营理念,平衡好规模与效益的关系,加快经营结构的调整及强化风险管理等。     

独立董事报酬水平和薪酬结构设计分析

目前，我国独立董事薪酬制度存在严重的效率问题。研究发现，最优薪酬水平取决于独立董事的风险偏好、收入预期、工作能力和生产函数；最优薪酬结构取决于独立董事的风险偏好、收入预期，与其工作能力和生产函数无关；风险厌恶程度较高的独立董事适宜偏重货币工资激励。     

SELogic保护逻辑在厂用电系统的应用

以厂用电系统为例，讲述了备自投的技术要求，详细分析了美国SEL-351A综保内部控制逻辑，总结实际应用中注意的问题及解决措施。     

Involving suppliers in product development: Insights from R&D directors and project managers

While there is increasing evidence that involving suppliers in new product development (NPD) is important, and for many firms even inevitable, there is also evidence that not all such efforts are successful. Firms aiming at implementing this strategy effectively have to pay close attention to several contingency factors on the organizational level and properly manage supplier involvement on the project level. The exploratory case study research underlying this article explores key issues to be considered when involving suppliers in NPD and the counter measures they can take. Our research shows that companies differentiate between so-called “know-how” and “capacity” projects, and that they manage them differently. Furthermore, this research shows that firms outside the automotive and high-tech manufacturing industries are likely to intensify supplier involvement in the future.     

Steward Effects of Target Founder-CEO in Takeovers

Built upon the agency theory and the stewardship theory, this study examines the mergers and acquisitions (M&A) activities among Chinese publicly listed firms. Using a founder-CEO indicator, we separate steward effects from agency effects, and find that Chinese firms’ M&A activities are significantly influenced by the steward factors after controlling for the agency factors. Firms, of which CEO is a founder, enjoy relatively higher premium during M&A. Further investigation reveals that the steward effects vary in the power of CEO. The results show that steward effect is reinforced when founder-CEO is more powerful.     

Logics,Leaders, Lab Coats: A Multi‐Level Study on How Institutional Logics are Linked to Entrepreneurial Intentions in Academia

Situated in the context of academia, this study integrates ideas from institutional theory, person‐environment fit theory and leadership research to conceptualize and examine the cross‐level link between the organizational‐level institutional logic of research commercialization and the entrepreneurial intentions of researchers. Multi‐level analyses based on a sample of 254 researchers working for 85 research group leaders in 49 German research institutes reveal that two distinct attributes of research group leaders – that is, their track records of entrepreneurial behaviour and their entrepreneurial intentions – play a significant role in transmitting the organizational‐level logic to the individual level. We also observe a complementary interaction between organizational‐level commercialization logic and the entrepreneurial track records of leaders. We discuss how these findings advance our understanding of science commercialization through academic entrepreneurship and how they inform institutional theory and theory development in other domains of entrepreneurship research.     

Measurement of Quality of Life and Well‐Being in France: The Drivers of Subjective Well‐Being

Ever since the publication of the Stiglitz Report, France has been heavily involved in the measurement of well‐being. The French Statistical Institute (INSEE) has expanded the scope of its existing surveys. It has also launched an innovative experimental survey which, drawing upon a single statistical source, aims for the first time to explore the different dimensions of both objective and subjective quality of life, as highlighted in the Stiglitz Report. It allows us to study, at the individual level, correlations between these dimensions and the accumulation of deprivations. It has enabled us to better understand the links between determinants generally referred to as objective dimensions of quality of life (such as health or education) and subjective well‐being. This information is of paramount importance for policy makers who cannot act directly on the level of people's satisfaction but can only act upon the levers of objective dimensions. This paper presents the main findings of the experimental survey.     

恶劣环境对船舶焊接的影响

在船舶建造过程中焊接工作量约占全部的30%~40%，焊接是保证质量的重中之重。焊接质量出问题，就可能造成严重的后果。我厂沿江堤而建，空气中湿度大，工作条件差。密集性气孔很严重。所以，在这种情况下，对我厂焊接质量控制提出更高的要求。