雾滴传热传质特性的理论计算模型

建立了不同雾化粒度下雾滴传热传质特性的理论计算模型,其计算结果能与实验喷雾干燥脱硫塔上所得数据较好地吻合。所得的雾滴干燥曲线和吸收曲线有助于了解雾滴在塔内的干燥。反应过程,从而指导工业装置设计和操作的改进。     

Development of the procedure for the stabilization of rainwater samples

ＤｅｖｅｌｏｐｍｅｎｔｏｆｔｈｅｐｒｏｃｅｄｕｒｅｆｏｒｔｈｅｓｔａｂｉｌｉｚａｔｉｏｎｏｆｒａｉｎｗａｔｅｒｓａｍｐｌｅｓＹｕａｎＺｈｏｎｇｘｉｎ；Ｃｈｕｎｇ－ＳｈｉｎＹｕａｎ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｃａｌＥｎｇｉｎｅｅｒｉｎｇＮａｔｉ...     

钢结构防腐涂层面漆可剥离现象的原因分析及处理措施

目的分析钢结构防腐涂层面漆出现可剥离现象的原因。方法利用质谱仪、环境扫描电镜、ICS 1100型离子色谱仪对涂料和漆膜进行测试分析。结果聚氨酯涂料和漆膜样品含有高沸点溶剂三甲苯和四甲苯,通过微观形貌分析发现漆膜固化不充分,在漆膜样品的萃取溶液中检测出了铵基盐类物质。结论聚氨酯涂料中的高沸点溶剂、低温环境下的小分子胺析出和湿热海洋环境是导致涂层面漆出现大面积可剥离现象的主要原因。     

小拖压条热轧制工艺

介绍 550 - 17小拖压条制造由铸造工艺改为热轧制工艺的方法 ,阐述轧辊型槽设计的原则 ,分型面与排布角度的选择及导道安装。     

基于影响因子分析的滑坡位移预测模型研究

将滑坡的影响因索引入到滑坡的位移预测模型中．从滑坡的位移动态变化特征和响应组成组分研究入手,将滑坡的位移分解为趋势项、周期项、脉动项和随机项．针对每一项进行研究,分别选取合适的影响因子变量和函数关系来模拟,并将各项耦合在一起得到位移的初步预测模型。通过对监测数据进行非线性多元统计回归分析,得到位移的最终预测模型。以长江三峡库区的新滩滑坡为实例,通过验证研究,发现将滑坡的影响因子引入滑坡的预测预报模型中的思路是有效可行的,而且可以明显地改善预测预报的时间尺度。     

油罐清洗作业安全防护措施

石油化工行业各类储油罐,由于检修改装、换装油品、淤渣沉积严重等原因,影响油罐的正常使用时,都需要进行清洗作业.清罐作业是石油库的一项重大作业,清罐周期一般为3～5 a.如果对油罐进行清洗作业缺乏经验或安全措施不落实,极易发生火灾、爆炸、中毒、窒息等事故.     

Simulated weightlessness for the ontogenesis of the otolith organ

The Science of Nature -     

Increasing the rate of sustainable change: a call for a redefinition of the concept and the model for its implementation

Mankind is committed to taking sustainable pathways in search of a state of sustainability. Thirty years after the “Limits to Growth” published by the Club of Rome the world is still far from the equilibrium of sustainable development (SD). Technology is postponing the depletion of natural resources but is not solving the problem itself, either because the technology is itself not sustainable or because the application of it is being mismanaged. This article attempts to analyze the wide gap between the strategies drawn up and the effectiveness of the actions taken in implementing sustainability. The paper addresses the issue of whether or not mankind can make the right choices and has the right infrastructure of pathways to do so. In short, an answer is sought to the question, “What are the prerequisites for the fastest rate of sustainable change?” This question is tackled by the four authors. They start from critical arguments concerning the effectiveness of sustainable change, explain the terminology used in the article and identify the main factors for increasing the rate of sustainable change, which are then discussed in detail in each part of the text (EG). Then, each from a different starting point, they comment on self-organization (US), sustainable innovation and cultural regions (HK), global cooperation and regional resources (MB) and sustainable research by universities (EG). The individual contributions, when taken together, form a discussion of the crucial factors or prerequisites for sustainable change. It is concluded that only cooperation between regions and regional stakeholders can give sustainable change the driving force needed to overcome global (political) friction and ensure that it moves forward in equilibrium and at a constant rate. Specific measures are put forward to maximize awareness within and among regions.     

用密切值法进行海域有机污染物优先排序和风险分类研究

将密切值法应用于大连湾海域有机污染物优先排序和风险分类研究是一种新的尝试 ,首先将大连湾海域有机污染物各评价指标 (污染物的毒性、在环境中的暴露情况和在水环境中的迁移转化 )的极端情况组成最优和最劣样本 ,再求可综合反映与最优和最劣样本距离两者水平的参数—密切值 ,并根据各污染物最优 (劣 )密切值的大小进行排序 ,根据最优 (劣 )密切值的突变来进行分类分析。实例计算结果表明 ,密切值法用于海域有机污染物优先排序和风险分类切实可行 ,而且不需要确定隶属函数、白化函数等主观参量或函数 ,评价结果更客观和可靠。     

水质铜测定不确定度的评定

根据火焰原子吸收分光光度法测定水中的铜含量,分析主要的测量不确定度来源,即标准曲线不确定度、标准溶液不确定度、测量重复性不确定度.计算得到水中铜的测定结果的合成不确定度为0.098mg/L,扩展不确定度为0.196mg/L.     

英国皇家鸟类保护协会

UK Press office：01767 681577Out of hours：01767 681577Northern Ireland：028 9049 1547Scotland：0131 311 6505Wales：029 2035 3007E-mail：grahame.madge@rspb.org.ukhttp：//www.rspb.org.uk/ 鸟类保护协会（Society for theProtection of Birds） 1889年2月年成立于加拿大的迪兹伯里,由RobertWilliamson Hon女士担任该组织的第一任秘书长,Montagu Sharpe任第一届主席。1904年,该组织在维多利亚女王的支持下正式更名为＂皇家鸟类保护协会＂。     

世界动物保护协会

世界动物保护协会（World Society for the Protection of Anirnals，WSPA）成立于1981年6月4日，是被联合国认可的国际动物福利组织，也是国际自愿性组织委员会（International Council of Voluntary Organization．ICVA）成员中唯一一个关于动物福利的组织。     

Model consideration for the origin of life

In an attempt to understand the origin of living systems we encounter the following problems: How can we conceive the origin of the first self-reproducing forms, and by means of what stimuli could a constant increase in the complexity of such forms commence? How can a translation apparatus for genetic information develop? One cannot that such an apparatus for the synthesis of enzymes can function alone without the interference of enzymes themselves, which, however, could only become available after the construction of the apparatus itself. What stimulus mechanism is conceivable that leads to the division of the genetic apparatus into a replication system, and an enzyme-synthesis system?The main problem therefore, is not the search for basic theoretical concepts. It is not a question which can be answered by means of specific experiments. One should rather explore the principal possibilities of how molecules combine to produce more and more complicated functional units. We look for the fundamental structural changes in the organizational systems and the driving forces initiating these developments. Questions concerning the detailed chemical realization are of secondary importance. In trying to solve the puzzle of how the genetic apparatus is gradually built up as complex aggregates of molecules, we consider a consistent causal chain of simple and transparent physicochemical model steps.     

人道对待动物组织

人道对待动物组织（People for the Ethical Treatment of Animals,简称PeTA）,又名善待动物组织,是全世界最大的动物权利组织。人道对待动物组织成立于1980年。是一个致力于建立和保护所有动物权益的非营利组 织,总部设在美国维吉尼亚州诺福克（Norfolk）,是美国最有影响力的动物保护组织。在现有的200多万名会员和支持者中,美国本土拥有75万名会员,     

向往森林

春天是万物复苏的季节，也是回归自然的绝佳时候。森林，那是一个接受大自然的洗礼、体验舂的气息的最佳去处。