Describing Human–Wildlife Interaction from a European Perspective

European researchers from both the natural and social sciences show growing interest in studying interactions between society and wildlife. A wealth of theoretical frameworks, concepts, and methods are used, but an integration of perspectives is lacking. This research note summarizes results from two workshops that included 63 delegates from 25 European countries, as well as a follow-up survey of 41 respondents. Two main theoretical approaches to the study of human–wildlife interactions were identified. One approach focuses on the collective societal level relying on theories of governance, social representation, deliberative procedures, and commons theory. The other approach targets individuals or groups, and is based on theories such as the cognitive hierarchy, theory of reasoned action, and theory of planned behavior. Interdisciplinary collaboration is needed to identify the best options for wildlife conservation and management in a more politically integrated Europe.     

农业推广方法选择研究——以陕西省三原县为例

本文以陕西省三原县为例,采用典型调查方法,运用问卷调查、农户访问等资料搜集手段,研究各种因素对农业推广方法选择的影响.研究结果表明:推广对象的经济状况、采用创新的不同阶段以及推广对象的文化程度等都影响到农业推广方法的选择,而要最大限度地提高推广效果需要综合采用多种农业推广方法.     

Developing Method Based on Object-oriented Modeling Techniques for Management Information System

A developing method is given which based on object-oriented modeling techniques for management information systems.The modeling techniques,especially,from CDM to PDM conversion,make it possible that the method can be used for developing such management information systems which based on relational database.The result shows that it can raise the efficency of the system developing,improve the system tability,enhance the system maintenability.     

Application of Engineering WorkStation in Analysis of Truck Crashworthiness

This paper presents the basic equations and algorithm of vehicle crashworthinessbriefly.Take a light-truck for example,some applied problems in ustng Engineering WorkStationto analysis truck crashworthiness are discussed.A installation method of contact surface is intro-duced,Finally,a nurnerical simulation result is presented.     

Methods and Techniques to Enhance the Production of Secondary Metabolites in Hairy Roots

Hairy roots culture is a new means to gain the plant secondary metabolites. How to enhance the production of secondary metabolites in hairy roots becomes a new hotspot recently. The authors summarize recent trends and results about the increase of the production of secondary metabolites in medicinal plant hairy roots. The change of culture conditions and the application of biotechnologies can enhance the production of secondary metabolites in hairy roots.     

基于小波分析的玉米籽粒图像正形研究

近年来,通过对玉米籽粒的尺寸、外形、色泽等方面的研究,已获得了一些必要的单籽粒的视觉信息。但是,对于粮食作物而言,只有实现了作物籽粒的大规模、快速识别,才有可能在实际生产中得到广泛应用。为此,采用图像标记法,对含有众多的、散放的玉米籽粒图像进行处理,对标记图像中的像素进行逻辑判断,采用多尺度小波分析算法,实现籽粒分割、定位及正形。     

两种有效的预测方法理论分析及实践

预算实际上是一种建模,即根据过去和现在已有的信息建立一个从过去引伸到未来的模型。而时序分析法和灰色系统理论是两种有效的预测方法。为此,介绍了这两种预测方法的原理,并预测了新疆兵团的农机情况。其结果表明:未来10年,新疆农机总动力和投入将会有较大幅度的增长,而农业机械化程度将趋于最高值。     

平行动轴少齿差传动多齿接触问题研究

以有限元弹性接触分析理论为基础，建立了平行动轴少齿差内啮合齿轮多齿接触时的有限元模型，提出了一种对平行动轴少齿差内齿轮副啮合过程中实际接触齿对数、齿间载荷的分配及齿面载荷分布的分析计算方法。以SH－350型平行动轴少齿差双环减速器为例，分析了其在额定载荷工况下的实际接触齿对数、齿间载荷分配及齿面载荷分布规律等，并利用应变测试方法进行了相应的实验，验证了理论分析计算的结论，为平行动轴少齿差内啮合齿轮传动承载能力的估算，齿轮几何参数的确定及零部件的强度分析计算提供了理论依据。