基于迭代列消元法的线性分组码参数盲识别

针对线性分组码参数盲识别容错性能差的问题,提出基于迭代列消元法的线性分组码参数盲识别方法。首先对截获矩阵应用迭代列消元法,将其相关列对应各个窗内的转移矩阵中的列向量作为候选校验向量,再根据截获矩阵对偶码空间归一化维数来识别码字长度和同步时刻,最后将对偶码字进行初等行变换识别校验矩阵。仿真结果证明,与以往盲识别方法相比,所提方法容错性能好,适用于各种码率的线性分组码的码字长度、同步时刻和生成多项式识别。     

农村信贷的思考——联保贷款的缺陷与创新

农户联保贷款是近年来农村信用社摸索并正大力支持的一种新型的支农贷款方式。它的推行在一定程度上缓解了农民贷款难的问题,对农村经济结构的战略调整和经济金融的发展发挥了积极的作用。但在具体的实践过程中,其“实施难”的问题日益显现,其自身存在的缺陷也不断显露。为此,本文分析了制约农户联保贷款实施的因素以外,从农户、信用社自身等角度提出了对策建议,并提出了交叉联保的创新机制;同时,对新机制实施的必要性、可行性和实施过程中应注意的问题作了进一步研究。     

基于YOLOv3的H型钢表面缺陷检测系统

为了提升H型钢的表面质量和安全系数,设计了一种基于YOLOv3算法的型钢表面缺陷检测系统.设计的检测系统由硬件系统和软件系统组成:硬件系统包括八角架式图像采集装置、电动控制系统和通信系统;软件系统采用YOLOv3目标检测算法.现场测试结果表明:1)检测系统可实时采集图像,并根据H型钢的规格型号能够自动调节图像采集装置结...     

“Reverse” nested lottery contests

This paper proposes a multi-prize “reverse” nested lottery contest model, which can be viewed as the “mirror image” of the conventional nested lottery contest of  Clark and Riis (1996a). The reverse-lottery contest model determines winners by selecting losers based on contestants’ one-shot effort through a hypothetical sequence of lotteries. We provide a microfoundation for the reverse-lottery contest from a perspective of (simultaneous) noisy performance ranking and establish that the model is underpinned by a unique performance evaluation rule. We further demonstrate that the noisy-ranking model can be interpreted intuitively as a “worst-shot” contest, in which contestants’ performances are evaluated based on their most severe mistakes. The reverse-lottery contest model thus depicts a great variety of widely observed competitive activities of this nature. A handy closed-form solution for a symmetric equilibrium of the reverse-lottery contest is obtained. We show that the winner-take-all principle continues to hold in reverse-lottery contests. Moreover, we find that a reverse-lottery contest elicits more effort than a conventional lottery contest whenever the prizes available to contestants are relatively scarce.     

Proteus仿真使用中的几个缺陷和应对办法

Proteus仿真软件,是当前EDA工具软件的优秀代表。但在使用过程中该软件存在一些缺陷。本文列举了该软件在模拟仿真中存在的几个缺陷以及我们采取的应对方法,供大家参考和讨论。     

小(2)型水库除险加固设计经验探讨

文章结合广西小(2)型水库除险加固设计概况,总结了一些主要建筑物的典型设计方案,并针对设计过程中存在的问题,提出做好病险水库除险加固工作的建议。     

推行"零缺陷"管理创建企业质量文化

把“零缺陷”质量管理理念引入石油企业质量文化建设之中，通过企业内部质量文化教育活动，改变员工的心智，树立“第一次就把事情做对”的理念，提高员工的质量意识和技术素质。并通过全体员工的参与，营造“以顾客为中心”、“以零缺陷为核心”的企业质量文化环境，创建适合本企业特点的质量文化，在建设现代石油企业质量文化过程中，通过管理创新塑造强势竞争力，追求石油企业卓越绩效。     

腹部带血管蒂皮瓣转移修复手外伤皮肤缺损的临床疗效

目的探讨腹部带血管蒂皮瓣转移修复手外伤皮肤缺损的临床疗效。方法选取我院2012年2月至2014年2月收治的80例手外伤皮肤缺损患者的临床资料进行回顾性分析,将其分为两组。观察组患者使用腹部带血管蒂皮瓣进行修复,对照组患者使用手指掌侧推进皮瓣进行修复,观察两组患者治疗效果。结果观察组40例患者皮瓣全部成活,对照组患者皮瓣成活37例,观察组优于对照组(P<0.05);外形恢复满意度方面,观察组患者满意度为97.5%(39/40),对照组患者满意度为70.0%(28/40),其中对照组患者有2例出现轻度臃肿,差异有统计学意义(P<0.05)。结论腹部带血管蒂皮瓣转移修复手外伤皮肤缺损的疗效明显,患者满意度高,外形恢复完整,具有较高安全性。     

基于贫困人口发展的旅游扶贫效应评估--以安徽省铜锣寨风景区为例

本文以安徽省铜锣寨风景区旅游扶贫开发为例，基于旅游扶贫开发对贫困人口的经济影响和非经济影响，从实际效应——贫困人口在旅游扶贫开发中实际受益和发展情况，感知效应——贫困人口对景区旅游业发展及由此产生的生活变化的感知和态度，效应的可持续性3个方面对旅游扶贫效应中贫困人口的受益和发展情况进行评估。     

The minimum approval mechanism implements the efficient public good allocation theoretically and experimentally

We propose the minimum approval mechanism (MAM) for a standard linear public good environment with two players. Players simultaneously and privately choose their contributions to the public good in the first stage. In the second stage, they simultaneously decide whether to approve the otherʼs choice. Both contribute what they choose in the first stage if both players approve; otherwise, both contribute the minimum of the two choices in the first stage. The MAM implements the Pareto-efficient allocation in multiple solution concepts including backward elimination of weakly dominated strategies (BEWDS), limit logit agent quantal response equilibrium, subgame perfect minimax regret equilibrium, level-k thinking, and diagonalization heuristics. Moreover, the MAM is unique under plausible conditions. Overall, contributions in the MAM experiment averaged 94.9%. Quantifying subjectsʼ responses to the questionnaire reveal heterogeneous reasoning processes and highlight the importance of developing mechanisms that implement the desired social choice outcome in multiple solution concepts.