西南太平洋巴勒尼地幔柱及塔斯曼海的张开

<正>我们认为,目前位于南极罗斯海区巴勒尼群岛之下的地幔柱在约40～45Ma时则在塔斯马尼亚正东,并曾受塔斯马尼亚碱性玄武岩的异常同位素和痕量元素特征的影响。从塔斯马尼亚穿过塔斯曼海向东北延伸的海山链可能是巴勒尼地幔柱的径迹。由此推测,塔斯曼海是在巴勒尼地幔柱上张开的。1 巴勒尼地幔柱 巴勒尼岛链(图1略)是在约10Ma到现在伴同巴勒尼地幔柱一起发生的板块内火山作用的结果而形成的(Wright等,1990)。Duncan等(1989)曾将巴勒尼地幔柱从巴勒尼群岛经(现在的)澳大利亚-南极扩张脊返回到东塔斯曼(喀斯喀特)海台的径迹描绘出来。根据从紧靠巴勒尼群岛最北面海山的磁条带(A5)推测位于塔斯马尼亚东南约 300km的东塔斯曼海台上的索埃拉海山,以及南塔斯曼海丘大陆附近的其它一些火山中心,当其在约10Ma被掩盖在澳大利亚-南极扩张脊之下以前,就可能是在巴勒尼地幔柱之上形成的。     

人体满意度和服装适体满意度

对消费者来说,服装适体的不满意,一个最显著的原因是服装不适合人体。可是,消费者对成衣适体的满意或不满意能超越服装的本身范围,如社会流行看法对消费者的暗示。     

应用核示踪物评价洗矿槽回收金的效果

在保证非常高的总砂金回率的情况下，洗矿槽能得到比其它重力选矿机高得多的富集比。洗矿槽工作可靠，价格便宜，操作简便，这就是为什么这种洗矿槽目前难以舍弃，并仍然是加拿大育突河地区最重要的砂金选矿设备的原因。     

SIMILARITY LAW OF FLUCTUATING PRESSURE WITHIN HYDRAULIC JUMP AREA

Through a series of model tests of five scales for 2-D free hydraulic jump, the da-ta of fluctuating pressure acting on the floor level within the hydraulic jump were obtained. Dur-ing the experiments, Froude number varied from 2.94 to 8.61, and Reynolds number rangedfrom 2×10~4 to 6×10~5. Experiment results indicate that the amplitude scale of fluctuating pres-sure is the length scale of model, i. e. P'=L, which agrees with gravity similarity law: Thefrequency scale of the fluctuating pressure is a unity i. e., f=1, which does not satisfy thegravity similarity law.     

THE FLOW PRODUCED IN PARTICLE-SUSPENSION BY AN INFINITE ROTATING DISK:SERIES SOLUTION

To the flow produced in particle-suspension by a rotating disk of infinite extent,the asymptotic behavior at infinity is analyzed.A corresponding series solution is presented.It isshown that this approach yields widely valid solutions of high accuracy for all the cases in whichthat suction or weak injection at the disk surface exists.For the cases that strong injection or par-ticle-free band exists,the series method fails.     

TURBULENCE MEASUREMENT INSTRUMENT WITH A SILICON PIEZORE-SISTANCE BEAM

A newly developed turbulence measurement instrument is introduced in the paper.The transducer of the device is based on the principle of the effect of silicon piezoresistance that isintegrated in a Wheatstone bridge on a pure silicon beam. At one end of the beam, a small lightball is installed as the target forced by the water flow. The other parts are prevented from thewater flow with a sophisticated stainless steel tube. The instrument can be used to measure turbu-lent velocities either in clear Water or in flows bearing hyperconcentration of sediment. It can al-so be used to measure velocities in both glass flume and model experiments as well as in pipe ex-periment by being mounted in a special way.