《大兴安岭鄂伦春》评述

本文对关小云女士的著作<大兴安岭鄂伦春>进行了评述.     

十六国时期少数民族政权法制的历史影响

十六国时期少数民族所建政权的法律制度多循魏晋,但当时一些有为君主为了适应特殊情势的需要,在取舍中原汉制的基础上,又制定了一些新的法律制度,在行政、刑事、民事、经济、婚姻、司法等制度方面均有所建树,从而使十六国时期的法制在中华法制文明发展史上留下了自己的身影。     

东南亚的黑色人种及其在中国和东南亚民族史上的地位

今天东南亚的绝大多数居民属于蒙古人种,但是还有一小部分人属于另外一个种族,那就是黑色人种。今天这个种族的人数虽然不多,而且主要分布在东南亚海岛地区,但是大量的资料表明,他们很可能曾经是中南半岛的主人,甚至很可能还广泛分布于中国大陆,特别是中国南方地区。东南亚的黑     

赫哲族居住形式的变迁

居住在人类文化中占有重要的地位,对自然条件的利用,人们的经济活动、社会结构、观念、外来文化等都会体现在居住形式中。赫哲人居住形式的变迁反映了赫哲族生活质量不断提高的过程。     

从国际人权立法与实践视角探讨少数民族人权的特殊保护

对少数民族人权保护问题研究的重点,是少数民族人权的特殊保护(特殊权利或特殊保护措施)问题,但研究还十分薄弱。系统地认识国际人权立法与实践中关于少数民族人权的特殊保护,对我国少数民族人权保护有着重要的借鉴意义。本文从少数民族人权特殊保护的涵义、必要性、特殊权利、国家义务、特殊保护的限度、特殊权利的限制和克减等方面展开分析和论述。     

An improved alternative estimation procedure for current population mean in presence of positively and negatively correlated auxiliary variables in two-occasion rotation patterns

Abstract

The present study confirms the influential role of a positively and a negatively correlated auxiliary variables in enhancing the precision of estimates of current population mean in two occasion rotation (successive) sampling. Exponential-type estimators of current population mean have been proposed for three different situations: (i) the information on a positively correlated auxiliary variable is readily available on both occasions (ii) the information on a negatively correlated auxiliary variable is readily available on both occasions and (iii) the information on both positively and negatively correlated auxiliary variables are readily available on both the occasions. The characteristics of the proposed estimators have been explored and their efficacious performances are compared with the natural and recent contemporary estimators. Optimum replacement strategies of the proposed estimation procedures have been formulated. Simulation and empirical studies are carried out to justify the proposition of the proposed estimators and appropriate recommendations have been put forward to the survey practitioners.     

Network Embeddedness in Exploration and Exploitation of Joint R&D Projects: A Structural Approach

This paper analyses how network embeddedness affects the exploration and exploitation of R&D project performance. By developing joint projects, partners and projects are linked to one another and form a network that generates social capital. We examine how the location, which determines the access to information and knowledge within a network of relationships, affects the performance of projects. We consider this question in the setup of exploration and exploitation projects, using a database built from an EU framework. We find that each of the structural embeddedness dimensions (degree, betweenness and eigenvector centrality) have a different impact on the exploration and exploitation project performance. Our empirical analysis extends to project management literature and social capital theory, by including the effect that the acquisition of external knowledge has on the performance of the project.     

互联网借贷能否实践"扶弱解难"的普惠金融理念——基于"人人贷"数据的分析

本文研究了存在随机产出风险时供应链上游高技术生产企业的专利运作战略.分别构建了3种最常见专利战略——独占、授权和共享下的供应链上下游决策模型.独占战略下,上游供应商自己生产零件并向下游制造商供货,但生产过程存在随机产出风险;授权战略下,供应商不生产零件但把技术授权给代工厂商并收取专利许可费;共享战略下,供应商把专利共享给代工厂商,当其随机产出实现且不能满足下游订单时由代工厂商来补足订单.研究结果表明,对供应商而言,若下游制造商面临的市场规模较小,则授权战略占优;若市场规模较大,此时哪种战略更好取决于其供应的可靠性:当可靠性较低时独占战略占优,当可靠性较高时共享战略占优.与分散决策相比,集中决策下授权战略占优的区间扩大,而独占战略占优的区间缩小.此外本文还发现,对供应商而言最优的专利战略和社会最优(即对整条供应链而言最优的专利战略)之间存在一定程度的偏离,且偏离的程度随启动成本的降低而加剧,随可靠性的降低而缓解.     

桥塞坐封过程仿真模拟研究

桥塞作为井下封层技术的关键设备,由于它施工工序少、周期短、卡封位置准确而得到了广泛应用。针对设计的可钻式非金属桥塞坐封过程开展模拟研究,涉及弹塑性材料接触、超弹性材料接触和非金属材料动态断裂的非线性动力学问题,利用有限元法建立该桥塞全尺寸模型和所有部件之间的广义接触关系,通过有限元模拟动态坐封过程获得桥塞各部件运动变形特性、桥塞与套管之间的密封特性和动态坐封力等数据,该桥塞坐封完成时,坐封机构部件轴向位移110 mm,坐封力约45 kN。模拟坐封也为进一步优化该型桥塞的结构和评估坐封性能提供了理论依据,对该型桥塞的推广应用奠定了基础。     

A New Quantile Function with Applications to Reliability Analysis

In this article, we propose a new class of distributions defined by a quantile function, which nests several distributions as its members. The quantile function proposed here is the sum of the quantile functions of the generalized Pareto and Weibull distributions. Various distributional properties and reliability characteristics of the class are discussed. The estimation of the parameters of the model using L-moments is studied. Finally, we apply the model to a real life dataset.