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重力测量
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    The detection of seismic waves is essential to our understanding of the Earth's interior. In order to study and finally affirm various phenomena and the corresponding geophysical excitation factors, it is very important to comprehensively analyze the information from space geodesy, gravitational measurements and paleogeomagnetic records as well as results from geophysical studies of theories and models.
    强调了地震波探测手段对于获取地球内部信息的重要性,同时指出将空间大地测量、重力测量和地磁观测与地球物理学方面的理论与模型研究相结合,对于最终分析和确认地球自转变化中的各种信息及其激发因素是十分重要的。
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  gravimetry
The performance characteristics of the proposed crystallization method are comparable to those of conventional gravimetry.
      
The proposed method outperforms gravimetry in its simplicity, versatility, possibility of automation, rapidity, and small volumes of test water portions.
      
The macrotexture and mechanical properties of porous Al2O3/Al metal ceramics prepared by the hydrothermal treatment of aluminum powder in a closed space are studied using gravimetry, pycnometry, mercury porosimetry, and scanning electron microscopy.
      
Kinetics of the contact deposition of nickel on aluminum from alkaline ammonia solutions of different composition is studied by methods of voltammetry, gravimetry, and x-ray fluorescent analysis.
      
The effect of thiocyanate on the corrosion dissolution rate of silver in thiosemicarbazide (TSC) ammonium-chloride-bromide solutions was studied by using gravimetry and rotating disc electrode technique.
      
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In this paper, the general characteristics of the Earth rotation variation and the possible geophysical excitation sources are briefly reviewed. The relations between the decadal fluctuations of the Earth rotation and the core mantle coupling is highlighted. Several possible mechanisms of the core mantle coupling are introduced. The detection of seismic waves is essential to our understanding of the Earth's interior. In order to study and finally affirm various phenomena and...

In this paper, the general characteristics of the Earth rotation variation and the possible geophysical excitation sources are briefly reviewed. The relations between the decadal fluctuations of the Earth rotation and the core mantle coupling is highlighted. Several possible mechanisms of the core mantle coupling are introduced. The detection of seismic waves is essential to our understanding of the Earth's interior. In order to study and finally affirm various phenomena and the corresponding geophysical excitation factors, it is very important to comprehensively analyze the information from space geodesy, gravitational measurements and paleogeomagnetic records as well as results from geophysical studies of theories and models.

简要介绍了地球自转变化的一般规律和可能的地球物理激发因素、十年尺度波动与核幔边界耦合之间的联系,以及几种可能的核幔耦合机制。强调了地震波探测手段对于获取地球内部信息的重要性,同时指出将空间大地测量、重力测量和地磁观测与地球物理学方面的理论与模型研究相结合,对于最终分析和确认地球自转变化中的各种信息及其激发因素是十分重要的。

The strict formula of the gravity variation caused by the movement of instantaneous rotation axis is presented.The gravity effect of the variation of the angular velocity and that of the polar motion are separated,and these practical effects are also estimated numerically.As an example,using the EOP series of IERS during 1982 and 1996,we calculated the gravity effect of the variation of earth rotation at Wuhan station.It is pointed out as a conclusion that the gravity effect of both polar motion and variation...

The strict formula of the gravity variation caused by the movement of instantaneous rotation axis is presented.The gravity effect of the variation of the angular velocity and that of the polar motion are separated,and these practical effects are also estimated numerically.As an example,using the EOP series of IERS during 1982 and 1996,we calculated the gravity effect of the variation of earth rotation at Wuhan station.It is pointed out as a conclusion that the gravity effect of both polar motion and variation of the angular velocity must be considered in the theory and in the practical data reduction of superconductive gravimetry or absolute gravimetry,however the gravity effect of the variation of the angular velocity was usually ignored before.Nevertheless,It is necessary to correct various large error sources before one tries to solve the variation of the angular velocity and that of the polar motion from gravimetry data.

极移对重力测量的影响在前人的研究和工作中已得到了充分的考虑并有不同形式的改正公式。但是由于地轴转动速率变化的重力效应的量级很小,且限于以前的测量精度以及资料处理方法, 因而常常被忽略。随着重力测量精度的提高以及资料处理方法的改进, 有必要重新讨论该项影响。本文从推导地球瞬时自转极运动对地面台站重力测量值影响的公式入手, 将地球自转角速率变化的重力效应和极移的重力效应分离开来, 并对它们的量级分别作了估计。本文着重讨论自转角速率变化对重力测量的影响。用 I E R S 的日长变化序列和极移序列分别具体地计算了1982 ~1996 年期间对武汉的重力测量值的影响, 结果表明, 自转角速率变化对武汉地区重力值的影响最大可达0 .25 microgal(peak -to - peak) , 这在高精度的绝对重力测量和相对重力测量中不应再被忽略

Gravity survey on the moon has a important meaning both for scientific research and for human self. Successful land on the moon by Apollo spacecraft made us can do high-resolution gravity survey on 400000 km of base line. The experimental moon gravity meter was improved on the basis of D-type of earth gravity meter, its precision can reach to millgal. The moon gravity meter has good experimental effect on the earth before landing on the moon, but it can't normally work when astronaut set up the gravity meter...

Gravity survey on the moon has a important meaning both for scientific research and for human self. Successful land on the moon by Apollo spacecraft made us can do high-resolution gravity survey on 400000 km of base line. The experimental moon gravity meter was improved on the basis of D-type of earth gravity meter, its precision can reach to millgal. The moon gravity meter has good experimental effect on the earth before landing on the moon, but it can't normally work when astronaut set up the gravity meter on the moon on schedule. The part of operation error has been discovered when designer tried to find the causes, which led the moon gravity pledge to failure.

月球重力的测量对科学研究及人类自身,其意义都是重大的。阿波罗的成功登月,使我们可以在40万km的基线上对重力进行高分辨率的测量。登月试验用的月球重力仪是在D型地球仪的基础上改进而成,精度达微伽级。登月前在地球上进行的试验效果良好,但是,当宇航员按登月计划在月球上布置好重力仪后,却不能正常工作。设计人员在查找原因时,发现了运算出错的部分,这一错误导致了月球重力试验的失败。

 
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