3下综放工作面缩面改造的实践与应用

该文主要介绍了枣矿集团田陈煤矿3下7108综放工作面缩面改造的方法和步骤,成功解决了因受断层影响造成工作面反刀把式布置的回采缩面难题,保证了工作面的合理布置和不规则工作面缩面系统改造的高效完成。田陈煤矿3下7108工作面为躲避断层,工作面采用了非常规型布置,为保证生产接续问题,决定工作面在由里向外回采过程中,数次进行工作面若干切眼的合茬对接和缩面改造,实现了连续生产。今介绍其中一次缩面改造的方案。     

钞票处理成本核算研究

本文利用线性成本核算的方法,系统分析了影响钞票处理成本核算的不利因素,认为我国钞票处理中心受制于管理体制、行政化思维模式等的束缚,成本核算工作尚处于起步阶段,并认为加强钞票处理成本核算,必须从进一步明确钞票处理中心企业化的特点,赋予钞票处理中心必要自主权能,建立钞票处理成本核算专门机构,改革现钞回笼及钞票处理流程,实施钞票处理成本承担分散机制等方面予以改进。     

Sustainability and innovation in staple crop production in the US Midwest

An agroecosystem is constrained by environmental possibility and social choices, mainly in the form of government policies. To be sustainable, an agroecosystem requires production systems that are resilient to natural stressors such as disease, pests, drought, wind and salinity, and to human constructed stressors such as economic cycles and trade barriers. The world is becoming increasingly reliant on concentrated exporting agroecosystems for staple crops, and vulnerable to national and local decisions that affect resilience of these production systems. We chronicle the history of the United States staple crop agroecosystem of the Midwest region to determine whether sustainability is part of its design, or could be a likely outcome of existing policies particularly on innovation and intellectual property. Relative to other food secure and exporting countries (e.g. Western Europe), the US agroecosystem is not exceptional in yields or conservative on environmental impact. This has not been a trade-off for sustainability, as annual fluctuations in maize yield alone dwarf the loss of caloric energy from extreme historic blights. We suggest strategies for innovation that are responsive to more stakeholders and build resilience into industrialized staple crop production.     

Thoughts on whether government should steer a tropical cyclone if it could

Previous work suggests if it were possible to lower sea-surface temperature using wind-wave pumps, it would sometime make sense to try to reduce the wind speed of a tropical cyclone (TC) that is likely to make landfall. While currently there is no plausible strategy to steer a TC, suppose that TC landfall location could be altered and subsequent damages perhaps reduced. Here, we ask whether and when such a modification might be desirable. As a thought experiment, we consider a hypothetical TC that will make landfall on the east coast of Florida. Using results from previous detailed damage modeling, we examine three simplified scenarios of TC modification resulting in altered landfall location. Even in these simplified scenarios, and assuming a zero cost for modification, we find that unless it becomes possible to steer a hurricane to the open ocean with something approaching certainty, it is likely that the complexities of the decision will always make it undesirable to undertake a modification intended to steer TCs.     

Methods for estimating optimal Dickson and Waters modification dividend barrier

In applications of collective risk theory, complete information for the distribution of individual claims amount is often unknown, but reliable estimates of its first few moments may be available. Dickson and Waters [Dickson, D.C.M. and Waters, H.R., (2004) Some optimal dividends problems, Astin Bulletin, 34, 49–74.] pointed out that shareholders should be liable to cover the deficit at ruin. Thus, they considered b the level of the barrier that maximizes the expectation of the difference between the discounted dividends until ruin and the discounted deficit at ruin. For such a situation, this paper develops methods for estimating the Dickson–Waters modification for the optimal dividend barrier b with the expectation of discounted penalty at ruin. In particular, two De Vylder approximations are explained, and the diffusion approximation for the expectation of discounted penalty at ruin is examined. For several claim amount distributions, the approximate values are compared numerically with exact values.     

大豆膳食纤维改性及在烘焙食品中的应用研究

膳食纤维广泛存在于植物中,其主要功能是降低肠道中胆固醇,预防便秘,保护体内有益菌群,排除体内废物.在大豆加工过程中,会产生大量的豆渣,其主要成分就是膳食纤维.本文具体介绍了大豆膳食纤维,并就大豆膳食纤维的改性进行深入研究,具体分析大豆膳食纤维改性在面包类、饼干类、蛋糕类烘焙产品中的应用.     

从克拉申的监控理论看语言输入调整策略

在二语习得的众多理论中，克拉中的监控理论占有相当重要的地位。而监控理论的五个假说中，输入假说尤为引起课程设计者、教材编写者以及教师们的极大兴趣。没有可理解的语言输入就没有语言的习得。因此，运用语言输入调整策略。使输入变成可听、可读、可理解的语言。从而促进习得过程是非常重要的。与此同时。语言学习者并不只是被动地接受，他们本身对语言输入的质量也负有责任。     

Gender differences in consumers’ acceptance of genetically modified foods

Research has shown that women are less accepting of genetically engineered products than men. We expect two mechanisms to be at work here. First, in consumer behaviour theory, more knowledge is assumed to lead to more acceptance. We assumed that for genetically engineered foods, this general principle does not apply since long‐term consequences are not known yet. The well‐informed consumer is likely to be comparatively more concerned with this lack of knowledge. We call this the information paradox. Theory on the topic is relatively recent. The results of this study will help to distinguish consumer behaviour with regard to new types of food as compared with traditional foods. Second, we assumed that there is a gender factor included in attitudes toward foods. In general, women still plan food and household purchases. A tentative attitude and an accompanying reluctance toward food innovation are adopted when buying food for children. We call this the gender paradox. In this exploratory study we use data from the Eurobarometer. Eurobarometer surveys have been executed since 1973 by the European Commission among the adult population of European Union member countries (n > 10 000), monitoring the evolution of public opinion. Analysis of these surveys shows that gender differences exist in the acceptance of genetically modified (GM) foods in Europe. Women tend to be less accepting toward genetically modified foods. This supports our gender hypothesis. However, no evidence was found to support the assumed information paradox. It seems that knowledge leads to acceptance, also of GM foods, but more so for men than for women.     

脲醛树脂胶的技术现状及发展对策

本文简述了脲醛树脂胶的使用性能和存在的主要问题，详细探讨了国内合成工艺状况，技术研究开发进展和国内外生产现状，并就如何进一步开发环保型胶粘剂提出了建设性对策。     

淀粉类胶粘剂的开发与应用

对淀粉类胶粘剂进行了系统的分类，并结合反应机理，详细阐述了各种淀粉胶的生产工艺、各改性剂的作用、产品的性能特点及主要应用领域。