森林土壤肥力及其生态经济效益

森林土壤肥力的高低与森林生态经济效益密切相关。其肥力以维持和恢复自然肥力为主，人工施肥为辅。根据这一指导原则，提出恢复其肥力的途径，并通过例子介绍森林施肥后的生态经济效益评估方法。     

Thinning and harvesting in stochastic forest models

This paper analyzes a stochastic forest growth model in which the manager is able to first thin the forest to promote better growth before harvesting. Both Wicksell single thinning and harvesting cycle and Faustmann on-going rotation problems are considered. The Wicksell problem is analyzed by first restricting the class of decision times to (thinning, harvesting) pairs that bound the growth away from infinity and imbedding the problem in an infinite-dimensional linear program on a space of triplets of measures. These measures capture the thinning and harvesting decisions along with the behavior of the growth process prior to harvest. An auxiliary linear program then leads to a nonlinear optimization problem for which an optimal value and solution are determined. The values of all the problems are be related through a set of inequalities. The solution of the nonlinear problem determines (random) thinning and harvesting times for the single thinning and harvesting cycle which demonstrate the equality of the values of these various problems. Finally for the Wicksell problem, the unrestricted class of thinning and harvest times is shown to give the same value as the restricted class. The Faustmann on-going thinning and harvesting rotation problem is reduced to a Wicksell problem which then allows for the characterization of the value as the solution to a different nonlinear optimization problem. The effects of the opportunity to thin the forest are illustrated on a mean-reverting stochastic model.     

试论森林环境资源核算

环境资源核算是当前国际社会最关注的热门课题之一,作者指出了现行国民经济核算体系的缺陷,论述了世界环境资源核算的研究现状及发展前景,重点介绍了环境资源核算研究的指导思想、环境资源核算的新概念及其分类、价值和计算方法、环境产业问题等,并对我国开展森林环境资源核算研究提出了几点建议。     

环境主导型生态旅游发展对策研究——以宜昌大老岭国家森林公园为例

生态旅游是在世界旅游业对人类社会的影响引起广泛重视、人类社会对环境质量普遍重视和颇为成熟的旅游市场对特种兴趣旅游更感兴趣的三大背景下产生的,是旅游的高级形式。我国生态旅游目的地主要分布在森林公园、自然保护区、国家地质公园和国家矿山公园等地。在开发过程中,有些企业将"生态旅游"当作一种低成本开发旅游资源的发展模式,失去了其保护生态环境的宗旨。通过实地勘探与考察,结合相关研究,本文以一个新兴的森林公园为例探讨其生态旅游可持续发展的科学对策。     

新林区企业网络营销现状及发展策略分析

网络时代的到来为新林区企业提供了机遇,也带来了挑战,由于互联网基础设施建设薄弱、传统观念的束缚、网络营销人才匮乏等原因制约着我国新林区企业网络营销的开展。本文结合新林区企业现状,针对以上问题,为新林区企业开展网络营销提出相应解决策略。     

制度变迁在天然林保护工程中的作用

天然林保护工程是在政府推动下实施的,属于强制性制度变迁。本文分析了这项制度变迁所遇到的阻力,天然林区林业职工、农林利益受损和地方财政收入减少是阻力产生的根源。为了使天然林保护工程能够顺利实施,笔者提出了减少阻力的对策,即采取各种措施以对利益受损者进行补偿和扶持。     

基于随机森林方法的基金收益率方向预测与交易策略研究

笔者引入一种新的非参数随机森林方法预测我国基金超额收益率方向,并和自回归移动平均、随机游走、支持向量机等方法进行比较,发现随机森林方法在收益率方向预测上有很好的效果,一定程度上证明了我国金融市场的可预测性。并在收益率方向预测结果的基础上构建各种交易策略,利用2006年12月至2008年10月我国股市大涨大跌期来检验交易策略,结果表明,在其他条件相同情况下,基于随机森林的交易策略表现明显要好于其他策略。     

论新时期离退休干部思想建设

随着社会离退休老干部队伍的不断扩大,离退休干部已成为改革开放,经济发展、社会稳定中一支不容忽视的重要力量。离退休老干部具有优良的革命传统和实践经验,但是,由于时代的变迁,他们如何在安度晚年生活的同时,为社会主义建设贡献余热,已经成为党和人民群众日益关心的话题,本文论述了加强离退休老干部思想建设的主要途径和关键措施。     

Gender and forest conservation: The impact of women's participation in community forest governance

Would enhancing women's presence in community institutions of forest governance improve resource conservation and regeneration? This paper focuses on this little addressed question. Based on the author's primary data on communities managing their local forests in parts of India and Nepal, it statistically assesses whether the gender composition of a local forest management group affects forest conservation outcomes, after controlling for other characteristics of the management group, aspects of institutional functioning, forest and population characteristics, and related factors. It is found that groups with a high proportion of women in their executive committee (EC)—the principal decision-making body—show significantly greater improvements in forest condition in both regions. Moreover, groups with all-women ECs in the Nepal sample have better forest regeneration and canopy growth than other groups, despite receiving much smaller and more degraded forests. Older EC members, especially older women, also make a particular difference, as does employing a guard. The beneficial impact of women's presence on conservation outcomes is attributable especially to women's contributions to improved forest protection and rule compliance. More opportunity for women to use their knowledge of plant species and methods of product extraction, as well as greater cooperation among women, are also likely contributory factors.     

“双碳”目标下我国森林保险创新发展研究

摘 要：党中央高度重视生态文明建设,“双碳”目标建设作为生态文明建设的核心,对生态碳抵消提出了极高要求。在“双碳”目标建设中,森林资源保护与发展贡献了巨额生态碳汇,而森林保险能有效分散森林经营风险,扩大森林固碳规模,对实现“双碳”目标意义重大。本文分析了森林保险赋能“双碳”目标的作用机制,总结了组织制度不完善、法律法规缺位、保费补贴不均衡、产品体系存在缺陷、经营能力差和保险费率固定等问题。本文借鉴国外森林保险赋能“双碳”目标的经验,从政府层面提出优化多方合作机制、加快森林保险立法、完善差异化补贴制度等政策建议;从保险企业层面提出构建科学产品体系、利用保险科技打通业务流程、强化费率差异化水平等措施建议,以期推动我国森林保险创新发展,助力“双碳”目标稳定实现。