An omnibus two-sample test for ranked-set sampling data

We develop an omnibus two-sample test for ranked-set sampling (RSS) data. The test statistic is the conditional probability of seeing the observed sequence of ranks in the combined sample, given the observed sequences within the separate samples. We compare the test to existing tests under perfect rankings, finding that it can outperform existing tests in terms of power, particularly when the set size is large. The test does not maintain its level under imperfect rankings. However, one can create a permutation version of the test that is comparable in power to the basic test under perfect rankings and also maintains its level under imperfect rankings. Both tests extend naturally to judgment post-stratification, unbalanced RSS, and even RSS with multiple set sizes. Interestingly, the tests have no simple random sampling analog.     

基于股价预测的泛证券投资组合策略

本文基于期望效用最大化和L₁-中位数估计研究了在线投资组合选择问题。与EG（Exponential Gradient）策略仅利用单期价格信息估计价格趋势不同，本文将利用多期价格信息估计价格趋势，以提高在线策略的性能。首先，基于多期价格数据，利用L₁-中位数估计得到预期价格趋势。然后，通过期望效用最大化，提出一个新的具有线型时间复杂度的在线策略，EGLM（Exponential Gradient via L₁-Median）。并通过相对熵函数定义资产权重向量的距离，进而证明了EGLM策略具有泛证券投资组合性质。最后，利用国内外6个证券市场的历史数据进行实证分析，结果表明相较于UP（Universal Portfolio）策略和EG策略，EGLM策略有更好的竞争性能。     

Rape culture,misogyny, and urban anxiety in NH10 and Pink

One of the most pervasive aspects of Delhi’s post-liberalization psychopathology has been everyday violence against women. The city’s rape culture was given an exceptionally sharp global focus after the horrific gang rape of Jyoti Singh on December 16, 2012. Recent Hindi cinema has begun to engage with some aspects of the capital’s misogynist urban ethos. In this paper, I look at how the Delhi subgenre of the “multiplex film” has engaged with rape culture, misogyny, and urban anxiety through a close textual and discursive analysis of two recent films—NH10 (Navdeep Singh, 2015) and Pink (Aniruddha Roy Chowdhury, 2016). Specifically, I identify how the December 16 “trigger event” and Delhi’s notorious misogyny are finding newer modes of representation through the interplay of genre and exhibition space. In what ways do these films position and imagine the “multiplex viewer”? New engagements with the figure of the consuming middle-class woman and the public discourses that surround her sexual safety and navigation of space have taken a central position in understanding the present urban psychosis of the capital. I suggest that these films and the forms of spectatorial identification that they privilege are intricately linked to the gendered spatial politics of the multiplex.     

Role of Leaders as Agents of Negotiation for Counterbalancing Cultural Dissonance in the Middle East and North Africa Region

This study provides a unique perspective in the field of cross-cultural management by exploring the relationship between “cultural dissonance”—the gap between cultural values and actual practice—and effective leadership attributes in the Middle East and North Africa (MENA) region. Incorporating cultural dissonance into implicit leadership theory, the study uses measurements of dissonance on nine cultural dimensions to identify particular leadership preferences in seven MENA countries. The overall findings suggest that societies prefer leaders who counterbalance cultural dissonance by allowing space for negotiations by members of society to reduce disparities between cultural values—“the way things should be”—and actual practices—“the way things are.” The greater the disparity between cultural values and practices, the greater the citizens' desire that leaders act as agents of change by creating space for negotiation.     

Analysis of a two incongruent arrivals and services M/G/1 queue with random feedback

A queuing system with two incongruent arrivals and services is considered. Two kinds of customers enter the system by Poisson process and the service times are assumed to have general distribution. After first kind service completion, it may feedback to repeat the first service, leave the system or go to give second service. The same policy is applied for the other kind of customer. All stochastic processes involved in this system are independent. We derive the probability generating function for each kind and for the system that yield the performance measures. Some numerical approaches examined the validity of the results.     

一类广义(2+1)维非自治长短波方程的整体光滑解的存在唯一性

利用先验估计和Galerkin方法,研究了非线性广义耗散(2+1)维非自治长短波方程在H4per(Ω)×H3per(Ω)上光滑解的整体存在唯一性.     

西部地区产学研协同创新效率及特征研究

随着“2011计划”的持续推进,协同创新已经上升到国家战略的层面。利用 RAM模型估算了西部地区协同创新效率,并结合基尼系数、σ收敛和β收敛分析了省际差异度和变动趋势。结果发现：西部地区效率具有非均衡性,这种非均衡性随着时间的推移并没有显著缩小,初期的效率低下状态将会对未来效率产生长期的制约。