浅谈贫困地区开发经果林效益不佳的原因及对策

林业的第二次创业,是要在山区、丘陵地区实施经果林开发工程,使一部分农民得到实惠。但是在贫困地区低效林比例太大,其原因主要有四：一是小生产与规模经营不相适应;二是筹措经果林开发资金难;三是缺乏高素质的开发管理人才;四是一部分基层领导干部素质不适应改革的新形势。要提高经果林开发的投资效益。必须做到：强化对人才的开发与管理;建立新型的规模经营承包管理机制;探索筹措开发经果林资金的新途径。     

二阶中立型无穷时滞微分方程的周期解

利用Fourier级数理论研究了二阶中立型无穷时滞微分方程的周期解,获得了周期解存在性和唯一性的充分必要条件.     

对高校基础会计实验教学的思考

高校基础会计教学不仅要向学生讲授会计理论知识和基本方法,而且更重要的是培养学生应用会计理论和方法去解决会计实际问题的能力。因此阐述加强基础会计实验教学的作用,分析我国高校基础会计实验教学中存在的问题,提出强化高校基础会计实验教学的几点对策建议。     

婚龄的法律效果与社会效果

法律作为一种规范,具有法律效果和社会效果,法律效果的显现在于法律和社会的契合程度,法律效果要以社会实践作为检验的手段,这就表现为社会效果。法律效果和社会效果是否被同时实现,实现的程度如何,可以引入西方经济学原理中的帕累托最优来衡量。通过婚姻法婚龄规定的法律效果和社会效果解析,我国婚龄的规定没有实现帕累托最优,因此还存在改进的可能性。     

浅析大学新生英语学习的心理障碍及其对策

如何引导大学新生尽快适应大学英语学习,这一问题长期以来没有得到足够重视.文章详细分析了新生在大学的新环境里,在英语学习上所表现出来的一些心理障碍,并运用有关大学生心理学理论来探讨解决这一问题的对策.     

论高校心理咨询的问题及发展对策

本文从时代发展和学生健康成长的角度强调高校心理咨询工作的重要性,指出领导、投入、咨询方式等方面存在的误区,就高校心理咨询健康发展提出系列对策。     

Target Rules for Public Choice Economies on Tree Networks and in Euclidean Spaces

We consider the problem of choosing the location of a public facility either (a) on a tree network or (b) in a Euclidean space. (a) (1996) characterize the class of target rules on a tree network by Pareto efficiency and population-monotonicity. Using Vohra's (1999) characterization of rules that satisfy Pareto efficiency and replacement-domination, we give a short proof of the previous characterization and show that it also holds on the domain of symmetric preferences. (b) The result obtained for model (a) proves to be crucial for the analysis of the problem of choosing the location of a public facility in a Euclidean space. Our main result is the characterization of the class of coordinatewise target rules by unanimity, strategy-proofness, and either replacement-domination or population-monotonicity.     

A diagnostic for selecting the threshold in extreme value analysis

A new approach is suggested for choosing the threshold when fitting the Hill estimator of a tail exponent to extreme value data. Our method is based on an easily computed diagnostic, which in turn is founded directly on the Hill estimator itself, 'symmetrized' to remove the effect of the tail exponent but designed to emphasize biases in estimates of that exponent. The attractions of the method are its accuracy, its simplicity and the generality with which it applies. This generality implies that the technique has somewhat different goals from more conventional approaches, which are designed to accommodate the minor component of a postulated two-component Pareto mixture. Our approach does not rely on the second component being Pareto distributed. Nevertheless, in the conventional setting it performs competitively with recently proposed methods, and in more general cases it achieves optimal rates of convergence. A by-product of our development is a very simple and practicable exponential approximation to the distribution of the Hill estimator under departures from the Pareto distribution.     

Efficiency with Endogenous Population Growth

In this paper, we generalize the notion of Pareto efficiency to make it applicable to environments with endogenous populations. Two efficiency concepts are proposed: ℘‐efficiency and 𝒜‐efficiency. The two concepts differ in how they treat potential agents that are not born. We show that these concepts are closely related to the notion of Pareto efficiency when fertility is exogenous. We prove a version of the first welfare theorem for Barro–Becker type fertility choice models and discuss how this result can be generalized. Finally, we study examples of equilibrium settings in which fertility decisions are not efficient, and we classify them into settings where inefficiencies arise inside the family and settings where they arise across families.     

普通工科院校学生工作面临的挑战与对策

高等教育大众化使原有的教育理念经受着巨大的冲击和挑战.学生工作肩负着学生思想教育和日常管理的任务,是培养高素质人才的重要保证.学生工作如何适应这种变化,提高工作的针对性和有效性,如何在观念、体制、方法上进行创新和重塑?本文从分析变化因素入手,探讨普通工科院校在大众化前提下学生思想教育管理需重点做好的工作.