华坪山药硬底斜式栽培技术

<正>山药硬底斜式栽培技术就是通过人工设式,将山药块根引入设式内生长的技术。具体是根据山药的长短,将种植沟挖成30°以上斜坡(面),用细沙、石灰浆、水泥做成沙浆抹在斜坡(面)上,使其表面光滑、硬化,将山药块茎引入斜坡(面)上生长的技术,这种技术能使山药块茎按照人们的意志固定在一定的位置生长发育,使山药产品质量提高,效益更加明显。     

新型交流介电式种子分选机技术参数的分析

将传统介电式种子分选机的电极导线在分选滚筒的圆柱表面上改进为轴向分布,可以使种子从送料斗里出来后马上与滚筒运动达成同步,使种子在电场中充分极化,增大电场引力．这样的介电式种子分选机分选性能高,分选范围大．     

绞盘卷管式喷灌机压管机构中弹性梁的设计

用于绞盘卷管式喷灌机压管机构中的矩形等截面弹性直梁 ,在梁自由端挠度及载荷相同条件下 ,设计梁使之满足强度条件 ,单梁式机构中梁的用材量与双梁式机构中梁的用材量之比为　 1 16。     

西瓜整枝有讲究

西瓜整枝的作用主要是让植株在田间按一定方向伸展,使蔓叶尽量均匀地占有地面,以便形成一个合理的群体结构。整枝方式因品种、种植密度和土壤肥力等条件而异,有单蔓式、双蔓式、三蔓式和新方法等。     

电饭锅的挑选

电饭锅按构造不同可分为间接式、直接式、烤箱式和电极式四种。按其自动化程度分为：①自动保温式。这种电饭锅在饭熟后能自动断电，并能使锅内的温度保持在70℃左右。②定时保温电饭锅。     

鲜皮的初步加工

1剥皮 屠宰后，在动物体还有余温时将皮剥下。剥皮方式有圆筒式、袜状式和片状式。 圆筒式：将尸体的后肢和尾部挑开，以后裆向头部剥皮成圆筒形，使皮向外翻出。     

鲜皮的初步加工

1剥皮 屠宰后，在动物体还有余温时将皮剥下。剥皮方式有圆筒式、袜状式和片状式。 圆筒式：将尸体的后肢和尾部挑开，以后裆向头部剥皮成圆筒形，使皮向外翻出。     

绞盘卷管式喷灌机压管机构中弹性梁的设计

用于绞盘卷管式喷灌机压管机构中的矩形等截面弹性直梁,在梁自由端挠度及载荷相同条件下,设计梁使之满足强度条件,单梁式机构中梁的用材量与双梁式机构中梁的用材量之比为１１／６。     

服装工作室式项目教学法在服装设计教学中的应用

服装工作室式项目教学法在服装设计教学中的应用,能够使学生的实践能力与创新能力得到有效培养。现通过对服装设计教学中存在的问题的分析,阐述服装工作室式项目教学法在服装设计教学中的应用,以此为服装设计教学提供改进方案。     

柴油机“飞车”的应急处理和故障排除

<正> (一) “飞车”的形成 用于拖拉机上的柴油发动机,目前广泛应用柱塞式喷油泵。由于柱塞式喷油泵的速度特性,使柴油机的供油量即使在维持供油拉杆位置不变     

基因工程教学中人文精神的渗透

大学生除了需要有丰富的专业知识外,还需要有较广阔的人文视野及较厚重的人文素养。但当代大学生人文精神严重缺失,特别是一些理工科学生。在专业课程教学过程中渗透人文精神,是对大学生进行人文素质教育的有效途径。文章结合教学实践阐述了基因工程教学中培养人文精神的必要性及渗透人文精神的途径:提高教师人文素养;利用基因工程相关公众事件、科幻电影等素材激发学生社会道德责任感;深挖教学内容,唤醒学生关爱生命,以人为本的情怀;通过科学史实和科学家的故事,搭建人文精神与科学精神的桥梁。     

复兴人文教育，重建人文精神

本阐述了人、人科学、人教育、人精神等几个概念，论述了当前大学教育中人教育失落、社会人精神状况不佳的客观现实，论证了知识经济时代不仅需要科学精神，还需要人精神，更需要人精神与科学精神的融合与共建，阐明了复兴人教育、人精神的对策措施。     

邓小平对科学技术本质观的发展

邓小平关于“科学技术是第一生产力”的论断，不仅从本质上进一步规定了科学技术属于生产力，而且第一次从量的规定上明确了现代科学技术是生产力的一泞要因素、决定量，这对马克思主义科学技术观是继承，更是发展。     

发展规范化农业科技企业应思考的几个问题

为进一步发挥农业科技企业在农业经济中的作用，从不同角度探讨了如何发展规范化的农业科技企业。首先明确了农业科技企业的概念和特征，其次在推行现代企业制度时要注意明晰产权和科学管理，最后要注意培养高素质的科技型企业家和员工队伍。     

质疑环境伦理学研究的三个问题

环境伦理学是一门实践性很强的应用伦理学,对环境伦理学的研究有许多问题值得质疑.关于环境伦理学的逻辑起点问题,关于对人类中心主义的理解问题,以及环境伦理学的理论与实践结合问题等都需要我们重新认识.     

四川省农业科技创新存在的问题与对策

阐述农业科技创新的内涵,分析四川省农业科技创新"十二五"的发展形势与紧迫性,剖析四川省农业科技创新过程中面临的问题,提出农业科技创新应涵盖技术创新和制度创新,总结促进四川省农业科技创新的建议和对策,以为四川省农业科技创新的发展提供参考。     

浅谈如何提高科技期刊的核心竞争力

随着科技期刊的竞争日渐激烈,如何提高科技期刊的核心竞争力是期刊发展的重要问题。基于中国科技期刊发展的现状,从人力资源和经营策略两方面提出了提高科技期刊核心竞争力的途径,为科技期刊更好地发展提供了参考。     

ESSAYS ON SCIENCE AND SOCIETY: The Nature of Evidence

In his essay, U. S. science writer Boyce Rensberger analyzes whether there is any truth behind the assertions that U. S. citizens are particularly ignorant about science and that the press is to blame for the high interest in pseudoscience. He concludes that many Americans are very interested in science, but cannot distinguish between good and bad science because they do not understand the standards that scientific evidence must meet. Rensberger urges scientists and science writers to pay more attention to the communication of the methods by which results have been achieved. See also the related essay by Roger Highfield.     

Can science survive in the modern age?

A recent newspaper account of the 1970 annual meeting of the AAAS was headlined, "Science's Blank Check Bounces." I am not, however, advocating that giving a "blank check" to science will solve all our problems. The discussion of science policy in the last three decades has too often confused necessary with sufficient conditions. A strong basic science is a necessary condition for a strong economy, a livable environment, and a tolerable society. But it is by no means a sufficient condition. That a vital science is an indispensable tool of human welfare in the present stage of evolution of man on the planet does not mean that it is the only tool or that it cannot also produce the opposite. Indeed, there seems almost to be a complementarity between the power for good and the power for evil inherent in science. Nuclear energy poses the possibility of nuclear holocaust, but is indispensable to a continuing supply of energy after fossil fuels run out. The computer threatens us with "big brother," but seems indispensable to the rational management of our complex social structures. Molecular genetics could be used for frightful purposes, but opens up the prospect of the final conquest of human disease and food supply. Drugs which control human behavior have opened up frightful possibilities for abuse and self-destruction, but they also offer the hope of conquest of mental illness. What I have referred to are really technologies, not science, but science is needed to use them wisely, although it will not guarantee their wise use. Although science cannot ask for a blank check, there is a part of it which must have the autonomy to "do its own thing"if it is to continue to serve society. How much of science should have this autonomy, and what sort of accountability should be required of it will be matters of continuing debate. Some accountability outside the scientific system itself is essential, as in any other human activity, but the degree of external accountability which is necessary will depend also on the success with which science maintains its own system of internal accountability, guaranteeing the intellectual excellence and integrity of its results. Although I do not believe scientists can be held accountable for the uses which society makes of the knowledge they produce, they do have an obligation to make clear the implications of this knowledge insofar as it is within their special intellectual competence to do so. However, I believe that the highest allegiance of science must continue to be to truth as defined by the validation procedures of the scientific process itself, and that the distortion of scientific results or the selective use of evidence for political purposes, no matter how worthy, is unforgivable insofar as it is presented cloaked by the authority and imputed objectivity of science. That science should have a measure of autonomy does not mean it cannot also respond to new social priorities. As in the past, new social missions can open up exciting new scientific questions, as fundamental as any generated by the internal workings of science. However, what is important is that no matter how much the broad strategy of science might be influenced by social priorities, the tactics should be largely governed by scientific criteria. Furthermore, it is essential that some science be supported and cultivated for its own sake alone. Here the primary criterion must be excellence as judged scientifically, that is, by internal standards. The fraction of the total technical effort that is supported in this way should have some degree of constancy over the long term. You are no doubt wondering what is the answer to the question posed by the title of this article. I cannot give a definite answer one way or the other. The threats to the integrity of science, both from within and from without, are probably greater than at any time in the past, because science is much more a part of the total social and political process, no longer the semihobby of a few dedicated and somewhat eccentric individuals. But I am an optimist. I do not think that the scientific enterprise is going down the drain. It will change, as science has always changed. It will respond to new social priorities, but, like an organism responding to disease, it will develop antibodies which will fight and finally contain excessive control by external criteria, and in fact will transform these external pressures into new opportunities and new fundamental fields of inquiry. But I could be wrong!     

论生命科学的新世纪

从科学、技术及其产业的发展动态论述了 2 1世纪是生命科学的新世纪 ,生命科学将决定着全球的经济和社会 ,影响到人类的生存和命运 .同时探讨了我国如何应对生命科学新世纪 ,提出了新农业观、新经济观和新现代化等的战略对策 .