用于遥测系统中的晶体调频振荡电路分析

本文主要分析遥测发射机中的晶体调频振荡电路,并导出晶体调频网络的参数与频率之间的关系式.最后,给出晶体调频振荡电路的实验结果和实际应用.     

Do the world’s largest cities follow Zipf’s and Gibrat’s laws?

We examine whether the size distribution and the growth process of the world’s largest cities follow Zipf’s law and Gibrat’s law. The parametric results of the size distribution analysis reject Zipf’s law for all sample sizes and also show the Zipf exponent systematically declines as the sample size increases. The growth process analysis confirms Gibrat’s law and yields a local Zipf exponent of one for cities with a normalized population less than 0.53%, which includes about 95% of the total observations. The deviations from Zipf’s law occur at the extreme upper tail and are likely a result of restricted mobility of population across countries. However, given that Gibrat’s law holds, we can expect the size distribution to converge to Zipf’s law with a decline in the barriers to immigration.     

Retaining volunteers for the cause: Hope and pride associated with cause-related charity events in cancer control

Special charity events are an important source of revenue for non-profit organisations in cancer control yet volunteering is declining and turnover is high. Experiences at cause-related events may influence retention, particularly emotions connected to the cause and ceremonies which honour cancer survivors and remember loved ones. We explore the degree to which emotions associated with cause-related volunteering and collective action in the literature are felt in response to Relay For Life and what emotions predict three indicators of retention: intention to return for future events, satisfaction with volunteering, and organisational commitment. Volunteers (n = 410) completed a cross-sectional survey at Relay For Life events in Queensland, Australia. Multiple regression analyses examined whether emotions associated with events predicted each indicator of retention, adjusting for number of years spent volunteering for events. Sixty-two percent reported an intention to return the following year. The most commonly reported event-related emotions were hope, pride, and empathy (62–69%). Intention to return, satisfaction, and commitment were each significantly predicted by hope and pride. The findings suggest special charity events in cancer control could retain volunteers by fostering pride and hope (e.g., for a cancer free future); however, future prospective research which examines the mechanisms of these relationships is warranted.     

Impact of Regulatory Enforcement on Leakages Prior to Analyst Recommendations

The financial press suggests that information is commonly leaked prior to analyst recommendations. We examine the impact that three regulatory actions (Regulation Fair Disclosure, Global Analysts Research Settlement, and the legal case against Galleon Group) have on information leakage prior to analyst recommendations. We find that all three regulatory actions have significantly reduced the leakage of information prior to analyst recommendations, even after controlling for several characteristics that explain the variation in information leakage. Our results are robust when applying an alternative method of measuring information leakage, and when forming various samples of analyst recommendations based on different criteria.     

安全联盟与经济合作研究——基于四种联盟类型的分析

联盟建立的初衷是为了满足国家在安全上的需要。但在无政府状态的国际社会中,经济交往产生的安全外部性促进了结盟国家间贸易往来的增加,确保了联盟国家间经济交往的发展;在联盟建立和发展过程中,联盟框架内存在的议题联系机制为联盟国家之间进行安全合作的同时实现经济合作提供了相应的交往渠道和方式。同时,一国通过经济上的补偿性支付的方式向其盟国提供经济补偿,使其从经济上获益,从而确保了安全联盟的稳定。根据联盟成员间的相互依存度和利益相容性程度,联盟会表现为实力增强型联盟、协调型联盟、霸权型联盟和飘忽不定型联盟等四种类型,联盟经济在各种类型的联盟中都会发挥作用;但在不同类型的联盟中,由于上述两个变量的不同,经济合作与安全利益的关联程度会有不同的表现,补偿性支付也会发挥不同的作用。     

Living in China： Hold the Oil Please

After residing in Beijing for over 6 years, many of my friends and colleagues in the d3.S. have said, Wow, it must be amazing living in China＂. Over the years I have to say, my experiences have been am...     

Toward a More Phronetic Leisure Science

In this essay, we examine the assumptions underlying natural science, social science, and the humanities. More specifically, we suggest that social science in general and leisure science in particular be guided by a different set of assumptions than those guiding natural science and the humanities. Drawing on the Aristotelian idea of phronesis, we propose that value rationality more so than instrumental rationality guide social scientific inquiry, and that social science in general, and leisure science in particular, be viewed as a bridge between natural science and the humanities.     

Accounting and networks of corruption

This study examines the nature and role of accounting practices in a network of corruption in an influence-market setting. The study focuses on the Canadian government’s Sponsorship Program (1994–2003), a national unification scheme that saw approximately $50 million diverted into the bank accounts of political parties, program administrators, and their families, friends and business colleagues. Relying on the institutional sociology of Bourdieu, the study demonstrates the precise role of accounting practices in the organization of a corrupt network imbued with a specific telos and certain accounting tasks. The study illustrates how accounting is accomplished and by whom, and it shows how the ‘skillful use’ of accounting practices and social interactions around these practices together enable corruption. In so doing, the study builds on a growing body of work examining criminogenic networks and the contextual, collaborative and systemic uses of accounting in such networks.