【摘 要】
：
冰坝是凌汛中冰情的一种现象。凌汛期封冻年份,在淌凌封河或解冻开河过程中,当冰块在河道里受阻停滞或冰块着地搁浅后,上游急速而来的大量流冰,有的下插,有的上爬,致使在较
论文部分内容阅读
冰坝是凌汛中冰情的一种现象。凌汛期封冻年份,在淌凌封河或解冻开河过程中,当冰块在河道里受阻停滞或冰块着地搁浅后,上游急速而来的大量流冰,有的下插,有的上爬,致使在较短时间内形成巨大的冰堆,在某些河段壅塞起来,有时可以向上游排铺数十公里。由于水流被阻塞,上游水位
Ice dam Ice Ling is a phenomenon in ice. During the Lingshui period of freezing, during the process of dripping Lingshui River or thawing the river, when the ice blocks in the riverway or the ice runs aground, a large amount of ice flowing rapidly from the upper reaches, some of them are inserted, and some climb upwards, resulting in In a relatively short period of time to form a huge pile of ice, in some sections of congestion, and sometimes can row up to tens of kilometers of paving. As the water flow is blocked, the upstream water level
其他文献
本成果是一项高强混凝土试验研究的概述。试验材料使用的是Ⅰ型波特兰水泥,砾石或轧碎的石灰岩粗骨料,本地的沉积砂,在有些拌和物中使用了减水缓凝外加剂。水灰比变动于0.70～0
The exact structure of an arginine-carboxylate salt bridge in different chemical environments remains a controversial problem. In the present work, the zwitteri
On the basis of the computed results got by the Gaussian 94 package at B3LYP/6 311++G** level, the reaction mechanism of CH 3O radical with CO has been invest
Reactions of [Cp 2Ln(μ-Cl)] 2(Cp=η 5-C 5H 5, Ln=Nd, Yb, Dy, Gd, Er) with an equivalent of [(THF) 3LiE 2C 2B 10H 10Li·(THF)] 2 (E=S, Se) in THF
A novel complex, [Cu 2(phen)(sal)(Hsal) 2] n(1), was synthesized and structurally characterized. The basic dimeric units are hold by sal ligands and extende
93111 汽车来件装配合资项目合作伙伴:德国著名汽车公司。该项目德方希望在中国汽车制造业寻找合作伙伴,建立合资工厂。初期采用来件装配方式,年组装5万辆轿车,逐步达到年产
新镗削的制动蹄片,装车后制动效果往往不尽人意。这是因为新镗削的制动蹄片的曲率半径等于制动鼓的曲率半径,两者虽然接触面大,但是受到的正压力却较小,造成制动性能不佳。
TI公司的LMH6881单通道PDA与2.4GHz LMH6882双通道PDA可在6～26dB的增益范围内提供优化的噪声、失真与带宽性能,从而可简化工程师采用差分放大器进行的设计。主要特点:最大增益
成都查处欺骗性交易行为见成效“五一”前后，四川省成都市各级工商行政管理机关对欺骗性交易行为进行集中检查行动，依据《反不正当竞争法》和《消费者权益保护法》规范经营者的
为今后更好地解决渠系建筑物的抗冻技术。吉林省水科所曾对全省渠系建筑物进行了冻害调查。通过调查认识到渠系建筑物的破坏现象是极其复杂的,冻害是我省渠系建筑物破坏的主