水族习惯法及其变迁——以贵州省三都水族自治县塘党寨为例

本文通过对贵州省三都水族自治县的一个典型水族村寨——恒丰乡塘党寨——的田野调查,描述了水族习惯法的表现形式、维护机制及其变迁。文章认为,水族地区社会经济的发展、国家权力的深入、长期的“送法下乡”活动以及宗教信仰等文化背景的深刻变化,是水族习惯法发生变迁的主要原因。研究这些变迁及其原因,对于理解和认识少数民族地区乃至整个农村的法治建设,具有不可忽视的作用。     

民族地区干部如何看待民族地区加快发展问题--云南地方干部问卷调查分析报告

新世纪中国民族地区面临的最大机遇是社会发展指标追赶的机遇,面临的最大挑战是人类贫困,从而使民族地区传统发展战略和宏观管理政策将面临着严峻的挑战。因此,本文依据具有民族地区代表性的云南地方干部调查问卷统计分析结果,通过考察民族地区发展战略的制定者和宏观管理政策的执行者——民族地区干部——对民族地区加快发展问题的认识和理解,总结出了一些有益的政策启示。     

试论民族地区普通中学多媒体课件制作及管理

运用现代教育技术提高教学效率是民族地区普通中学发展的必由之路。只有正确认识民族地区普通中学教育技术应用的背景,加强对此类教学资源的管理,才能使之更好服务于教学,提高民族地区教学实践活动的效率。     

法律的民族志写作与文化批评——论中国的法律人类学研究

本文针对目前我国对法律人类学的研究还没有形成独立的学科特色和明确研究方向、研究方法这一问题,提出可以以法律的民族志写作为其工具,进行法律的文化批评,用实践化的研究风格树立其独特的交叉学科形象。     

Inventory‐Based Dynamic Pricing with Costly Price Adjustment

We study an average‐cost stochastic inventory control problem in which the firm can replenish inventory and adjust the price at anytime. We establish the optimality to change the price from low to high in each replenishment cycle as inventory is depleted. With costly price adjustment, scale economies of inventory replenishment are reflected in the cycle time instead of lot size—An increased fixed ordering cost leads to an extended replenishment cycle but does not necessarily increase the order quantity. A reduced marginal cost of ordering calls for an increased order quantity, as well as speeding up product selling within a cycle. We derive useful properties of the profit function that allows for reducing computational complexity of the problem. For systems requiring short replenishment cycles, the optimal solution can be easily computed by applying these properties. For systems requiring long replenishment cycles, we further consider a relaxed problem that is computational tractable. Under this relaxation, the sum of fixed ordering cost and price adjustment cost is equal to (greater than, less than) the total inventory holding cost within a replenishment cycle when the inventory holding cost is linear (convex, concave) in the stock level. Moreover, under the optimal solution, the time‐average profit is the same across all price segments when the inventory holding cost is accounted properly. Through a numerical study, we demonstrate that inventory‐based dynamic pricing can lead to significant profit improvement compared with static pricing and limited price adjustment can yield a benefit that is close to unlimited price adjustment. To be able to enjoy the benefit of dynamic pricing, however, it is important to appropriately choose inventory levels at which the price is revised.     

性别保护视角下强奸罪的反思与重构

我国刑法采取传统性别模式评价性侵犯罪,在应对新型性侵犯罪方面存在一定的滞后性。通过对刑法法意和性权益保护方式的分析,发现由于受制于单一性别模式,强奸罪立法规定存在不足,具体体现在法益保护、犯罪行为方式、犯罪主体对象划定、涉性犯罪的概念位阶等的规定不周延,以及罪名体系不统一方面。强奸罪的立法完善应从三个方面进行:取消强奸罪的性别限制;扩大强奸罪行为方式;强调对不同性别人群的性权利予以同等保护,从而实现对不同类型性侵犯罪行为的有效规制。     

一类含有随机参数的混沌系统的Hopf分岔研究

文章选取随机变量为系统的随机变量研究含有随机参数混沌系统的Hopf分岔,利用Chebyshev正交多项式逼近理论将含有随机变量的系统转化为等价的确定性系统,通过Hopf分岔定理和Lyapunov系数讨论了随机参数系统的Hopf分岔及稳定性,发现随机系统的渐进稳定性参数区间大小不仅和确定性参数有关,还与随机参数有非常密切的关系.     

Subgroup Analysis with Time‐to‐Event Data Under a Logistic‐Cox Mixture Model

Subgroup detection has received increasing attention recently in different fields such as clinical trials, public management and market segmentation analysis. In these fields, people often face time‐to‐event data, which are commonly subject to right censoring. This paper proposes a semiparametric Logistic‐Cox mixture model for subgroup analysis when the interested outcome is event time with right censoring. The proposed method mainly consists of a likelihood ratio‐based testing procedure for testing the existence of subgroups. The expectation–maximization iteration is applied to improve the testing power, and a model‐based bootstrap approach is developed to implement the testing procedure. When there exist subgroups, one can also use the proposed model to estimate the subgroup effect and construct predictive scores for the subgroup membership. The large sample properties of the proposed method are studied. The finite sample performance of the proposed method is assessed by simulation studies. A real data example is also provided for illustration.     

Estimating Abundance from Presence–Absence Maps via a Paired Negative‐Binomial Model

The estimation of abundance from presence–absence data is an intriguing problem in applied statistics. The classical Poisson model makes strong independence and homogeneity assumptions and in practice generally underestimates the true abundance. A controversial ad hoc method based on negative‐binomial counts (Am. Nat.) has been empirically successful but lacks theoretical justification. We first present an alternative estimator of abundance based on a paired negative binomial model that is consistent and asymptotically normally distributed. A quadruple negative binomial extension is also developed, which yields the previous ad hoc approach and resolves the controversy in the literature. We examine the performance of the estimators in a simulation study and estimate the abundance of 44 tree species in a permanent forest plot.     

城市化进程中少数民族流动人口就业现状、存在问题及其对策分析

城市化进程的加快,必然导致人口流动,更多少数民族人口流动到城市就业.作者对成都市少数民族流动人口就业现状、特征进行了调查,分析了少数民族流动人口就业存在的问题,并就与之相关的对策进行了探讨.