类胡萝卜素对花玛丽鱼体色影响的最适量研究

将４月龄花玛丽鱼（Ｍｏｌｌｉｅｎｓｉａ Ｖｅｌｉｆｅｒａ）３００尾随机分成６组，每组５０尾，设１对照组和５个处理组，各处理组饲料在对照组饲料的基础上分别添加１００ｍｇ／ｋｇ、２００ｍｇ／ｋｇ、３００ｍｇ／ｋｇ、４００ｍｇ／ｋｇ、５００ｍｇ／ｋｇ的类胡萝卜素（Ｃａｅｒｏｔｅｎｏｉｄｓ），在近２个月的试验中，每隔７ ｄ从每一组中随机抽取５－６尾鱼测定鱼体肌肉中所含类胡萝卜素的量，通过对鱼体体色的对比观察和鱼体肌肉中所沉积的类胡萝卜素量的比较，结果表明：花玛丽鱼饮料中添加类胡萝卜素的最适添加量为４ｍｇ／ｋｇ。     

弯扭联合作用下钢混凝土组合箱梁受力特性的试验研究

制度经济学的外部性理论可以证明：只有将京津冀地区独立研发的外部性转为内部性才能使三地研发资源的配置达到最优。帕累托最优理论也证明：通过资源的整合可以达到在没有使京津冀三方中任何一方变坏的前提下，使一方变好，最终达到最优。以这两个理论为基础，通过构建包含有信息协调与共享，市场交易与合约管理，京津冀研发联盟政府支持，关系与政策协调等功能的京津冀区域研发联盟就能够实现京津冀在科技资源配置上达到共赢的目标。     

Pareto Poisson–Lindley distribution with applications

A new lifetime distribution is introduced based on compounding Pareto and Poisson–Lindley distributions. Several statistical properties of the distribution are established, including behavior of the probability density function and the failure rate function, heavy- and long-right tailedness, moments, the Laplace transform, quantiles, order statistics, moments of residual lifetime, conditional moments, conditional moment generating function, stress–strength parameter, Rényi entropy and Song's measure. We get maximum-likelihood estimators of the distribution parameters and investigate the asymptotic distribution of the estimators via Fisher's information matrix. Applications of the distribution using three real data sets are presented and it is shown that the distribution fits better than other related distributions in practical uses.     

Testing equality of conditionally jfclhwdqw exponential distributions

For the models given V = v (a common random stress), X and Y are independently exponentially distributed with failure rates λ₁and λ₂v, testing H₀λ₁λ₂using a random ‘paired’ sample is considered. It is shown that a uniformly most powerful invariant test does not exist even for one sided alternatives; locally most powerful invariant tests are derived and compared with existing procedures. The method is illustrated with reliability data. Finally, the robustness of the tests when the relationships of the failure rates to V is more complex are established.     

“农超对接”供应链的纵向合作研究——通道费、收入分享和Pareto改进

超市收取的高额通道费已成为我国"农超对接"供应链可持续发展的主要障碍。以超市和农产品生产基地组成的"农超对接"供应链为例,通过建立博弈数学模型,分别考察在独立决策、超市收取通道费和收入分享三种情形下,超市和农产品生产基地的收入变化情况。研究结果表明:(1)超市收取的通道费降低了农产品生产基地的收入;(2)当超市收取通道费大于某个临界值时,超市和农产品生产基地将失去进行收入分享合作的空间;(3)当超市收取通道费低于某个临界值时,存在一个收入分享合作策略的可行域,可以使双方的收入得到Pareto改进。     

由巨型大学到一流大学——一种基于结构优化的视角

巨型大学是高等教育大众化背景下产生的一种新的大学样式,主要特点是规模庞大,具体表现在拥有多个校区、培养多种层次人才、开设大量课程、在校师生员工众多等方面。巨型大学并不等同于一流大学,我国的巨型大学需要克服组织结构科层化、专业结构市场化与师生结构数据化等问题,要采取依法办学、特色办学和人才强校策略优化内部结构,实现向质量上的一流大学飞跃。     

Generalized additive modelling of sample extremes

Summary.  We describe smooth non-stationary generalized additive modelling for sample extremes, in which spline smoothers are incorporated into models for exceedances over high thresholds. Fitting is by maximum penalized likelihood estimation, with uncertainty assessed by using differences of deviances and bootstrap simulation. The approach is illustrated by using data on extreme winter temperatures in the Swiss Alps, analysis of which shows strong influence of the north Atlantic oscillation. Benefits of the new approach are flexible and appropriate modelling of extremes, more realistic assessment of estimation uncertainty and the accommodation of complex dependence patterns.     

目标规划模型最优可达值的等价命题

本文首先给出了目标规划模型最优可达值的概念，然后证明了它的若干个等价命题．     

陕西省人口承载力与适度人口定量研究

文章分析了人口承载力模型和适度人口量化测算模型,对陕西省人口承载力与适度人口规模进行定量估计,探讨了陕西省人口与经济社会、资源环境协调发展的对策。     

A matching prior for extreme quantile estimation of the generalized Pareto distribution

Extreme quantile estimation plays an important role in risk management and environmental statistics among other applications. A popular method is the peaks-over-threshold (POT) model that approximate the distribution of excesses over a high threshold through generalized Pareto distribution (GPD). Motivated by a practical financial risk management problem, we look for an appropriate prior choice for Bayesian estimation of the GPD parameters that results in better quantile estimation. Specifically, we propose a noninformative matching prior for the parameters of a GPD so that a specific quantile of the Bayesian predictive distribution matches the true quantile in the sense of Datta et al. (2000).