Mongolian nomadic culture and ecological culture: On the ecological reconstruction in the agro-pastoral mosaic zone in Northern China

After analyzing the grassland environmental characteristics and nomads vs. agrarian land use styles and their ecological and environmental influences in the arid and semiarid agro-pastoral mosaic zone in northern China, it was concluded that Mongolian nomadic culture is more close to the basic principles of the ecological culture in the modern sense. Mongolian nomadic culture has advantages over agrarian culture in ecology and environmental care, sustainable utilization of grasslands, and in sustainable human social economic development in the region. Generally speaking nomadic culture prevents desertification; whereas, agrarian culture facilitates desertification. Confliction between nomadic protection and agrarian destruction of grassland ecosystem is essentially focused on the problem of regional and even global ecological safety. Obviously, protection of ecological safety should be given priority because human social and economic existence, as well as development depend on and are decided by the vulnerable ecological safety in the arid and semiarid areas. Therefore expansion of cropping into the fragile ecosystem of arid lands was unfortunate. The long term sustainable management of these grassland ecosystems could benefit from reversal of policies that are exacerbating the problems of land degradation, and from the adoption of land use practices that have been successfully applied for centuries by Mongolian herders. Protection of grasslands and nomadic culture is far more important or even vital to the subsistence and sustainability of human and all other beings, compared to the protection of agrarian lifestyle and land cultivation. Protection of ecologic safety is protecting the premise and fundamental bases of economic and social development in the area. It is important to derive the rational elements of nomadic culture in construction of ecological culture, and in the ecological reconstruction in northern China. Based on analyzing and reasoning in line with the quintessence of nomadic culture summarized, some proposals on ecological reconstruction in the area are presented.     

Modeling Disinterest and Dislike: A Bounded Bayesian Mixed Logit Model of the UK Market for GM Food

Mixed logit models represent a powerful discrete choice analytical model but require assumptions about the functional form of the parameter distributions. The use of unbounded distributions, such as the normal distribution, may be regarded as unsuitable where theory indicates that all are negatively affected by increases in an attribute, such as price. Bounded distributions such as the triangular and log-normal are unable to model the case where a section of the population is indifferent towards an attribute, while the remainder are negatively disposed toward it. Train and Sonnier’s bounded mixed logit model accommodates these features and is employed in this paper. A censored normal and Johnson’s S_b distribution are used to model preferences in the UK for food attributes, including price and GM technology. Bi-modal distributions are identified regarding GM food: some are unlikely to ever consume it, some are close to indifference and willing to consume at relatively small discounts while the remainder are fairly unresponsive to further price reductions.     

基于发展核电的生态经济价值及其伦理思考

发展核电、开发利用核能充满复杂而多层次的价值矛盾，在巨大的生态与经济利益和风险之间．核电对生态环境及人类安全的威胁问题倍受社会各界的关注．并由此引发了一系列价值难题和伦理争论，成为影响核电发展的关键。核电的安全、可持续发展不仅仅是技术问题，还涉及一系列的伦理问题，要保证核电可持续发展并有益于生态环境保护且不损害人类利益，不能犯“技术决定论”的错误．必须辅之以伦理之轨。伦理之轨通过深入核电发展链的各个环节．对核电发展进行伦理价值观的批判和引导．参与战略选择使之得以规约．并保障核电发展有益于人类合的目的性价值得以实现。     

我国绿色食品出口贸易中存在的问题及对策探析

20世纪90年代以来,绿色食品贸易在全球兴起并已成为人类社会可持续发展的必然选择。然而,尽管在国内绿色食品生产日益社会化、市场化、国际化的背景下,我国绿色食品已经呈现出蓬勃发展的良好态势,但出口数量和出口规模还是偏低。本文在分析我国绿色食品出口中存在的问题及原因的基础上,探索相应的对策,以期为我国绿色食品竞争优势的提升提供有益的思路。     

试论我国食品安全供应链综合管理

食品供应链综合管理的核心内容是质量认证与跟踪管理,其思想为解决我国食品供应链中的安全问题提供了基本的思路。本文在分析我国食品供应链中存在的与食品安全相关的问题基础上,对我国实践食品安全供应链综合管理进行了思考,提出了从宏观、中观、微观三个层面上进行食品安全供应链综合管理的框架,并对食品安全供应链综合管理中的信息集成与共享进行了探讨。     

中国粮食生产区域分化特征和成因的实证研究

对中国在1990年和2002年粮食生产的区域分化状况进行统计分析的结果表明,工业化和城市化的发展,以及农产品市场形成条件下,稻米生产的区域分散特征、小麦生产的区域集中特征以及玉米播种面积的集中和生产产量的分散特征日益明显。计量检验显示,人均承包经营耕地面积和种植业收入比率是影响粮食生产区域分化的最主要的两个因素。     

机场净空区超高障碍物风险性分析

针对机场净空区超高障碍物较多的现象,对飞机飞行航迹进行了测试,提出了净空安全系数的概念,结合实际测试数据,应用统计分析原理,得出了净空安全系数的概率分布规律.以安全系数的分布规律为基础,对不同超高障碍物的风险性进行了分析,并提出了按照不同安全系数划分障碍物限制高度的思路,最后给出了不同类型机场净空安全系数的建议值,对各类机场净空管理和障碍物限制面的确定具有重要参考价值.     

龙丽高速公路(K92+945-K93+105)石方路基控爆施工

文章详细介绍了浙江龙丽高速公路K92+945-K93+105段高陡石方路堑在保证其下方的省道通行安全及交通畅通的情况下所采取的安全防护、控制爆破及施工组织措施。     

食品质量与安全专业双语教学的探讨

本文在分析双语教学内涵的基础上，根据作者对食品科学专业多年来的教学经验，分析了在食品质量与安全专业开设双语教学的重要性和必要性，深入探讨了在食品质量与安全专业开设双语教学的教学模式，同时指出了目前双语教学存在的主要问题和对策，提出双语教学是培养与国际接轨的食品质量与安全复合型人才的最有效手段。     

基于改进遗传算法的生鲜加工配送中心连续选址模型

建立了生鲜加工配送中心选址连续模型，在引入监控算子的基础上，运用改进的遗传算法对模型进行求解。该模型和改进的遗传算法可有效的解决生鲜加工配送中心的选址问题。