【摘 要】
：
黑龙江省地处东北边疆,冬季气候寒冷,结冰期长达6个月左右,各型水库一年中有半年的时间是在结冰期运行。冰盖层对坝坡的危害十分严重,有些护坡曾几经翻修,仍遭到破坏。据统
论文部分内容阅读
黑龙江省地处东北边疆,冬季气候寒冷,结冰期长达6个月左右,各型水库一年中有半年的时间是在结冰期运行。冰盖层对坝坡的危害十分严重,有些护坡曾几经翻修,仍遭到破坏。据统计,十几年来全省大中型水库因冰盖
Heilongjiang Province is located in the northeastern frontier, cold climate in winter, the ice period of up to 6 months, various types of reservoirs in a year half a year is running in the icing. The ice sheet is very detrimental to the dam slope. Some of the revetments have been renovated and are still being damaged. According to statistics, more than 10 years the province’s large and medium-sized reservoirs due to ice cover
其他文献
轿车常常在制动时发出一种尖叫声,它在制动力足够并能保证在规定的距离之内停住车时,是无关紧要的,但要及时排除,否则,一旦制动失灵,后果是不堪设想的,如何排除呢?
Car oft
我单位北京130汽车一辆,在对发动机电路保养之后,发现用起动机起动时发动机马达旋转正常,但不能着车,而用手摇起动则可以顺利起动。检查其线路的连接并未发现问题,于是更换
在如今铺天盖地的广告时代,众多的中国企业都在绞尽脑汁,刻意创新,以保证自己的广告不被广告海洋所淹没,并力求脱颖而出,一鸣惊人。由此,广告创新正成为企业界精心研究的重
Three dye-doped polymer rods in different matrices were synthesized in which weak hydrogen bond, strong hydrogen bond and covalent bond existed between the dye
A new method for the determination of utratrace silver(I) by near field thermal lens spectrometry has been developed. This method is based on the silver(I) cat
前言可以说,轮胎技术是随着汽车文化的发展而进步的。在100余年的历史中,汽车文化在扩大人际交流的同时,也促进了经济的发展,丰富了生活内容,但对地球环境也加大了负面的影响
Mixed distannoxane dimers [ClR2SnOSnR’2Cl]2 were synthesized by the reaction of R2SnO (R = Bu, Pr) and R2SnCl2 (R = Me, Ph, Cy, Oct). The crystal structures o
IntroductionPoly( 3- alkylthiophenes) ( P3ATs) ,as a newkind of soluble,fusible and processable conductivepolymers,have attracted a great interest and muchatten
Polyether moiety was introduced to the phosphinite and the phosphinite modified rhodium complex formed in situ was highly active in the hydroformylation of high
全市维修行业管理在上级领导下,各部门积极配合、全系统维修管理人员共同努力,由于改革开放新形势带来了机遇,加上我们很好地抓住了这个机遇,维修行业管理可以说关系已理顺,