Gravity anomalies of 2-D bodies with variable density contrast

Geophysics ◽  
2001 ◽  
Vol 66 (3) ◽  
pp. 809-813 ◽  
Author(s):  
Jianzhong Zhang ◽  
Benshan Zhong ◽  
Xixiang Zhou ◽  
Yun Dai

A new method is presented to compute gravity anomalies that result from 2-D bodies with variable density contrast. The cross‐section of a body is approximated by a polygon. Density is assumed to vary as any order of polynomial function with depth and lateral position. Results calculated by the proposed method for models with variable density contrast compare well with other methods. Liaohe basin, northeast China, is modeled from field gravity anomalies using the formulas given, showing the method is valid and effective.

1937 ◽  
Vol 4 (2) ◽  
pp. A49-A52
Author(s):  
Miklós Hetényi

Abstract This paper calls attention to a new method of dealing with deflections of beams, the cross sections of which vary by steps. It is shown that the effect of this variation on the shape of the deflection curve can be represented by a properly chosen force system acting on a beam of uniform cross section. There is no approximation involved in this substitution, whereby the original problem is reduced to one of computing deflections of beams of constant cross section.


1989 ◽  
Vol 130 (4) ◽  
pp. 711-719 ◽  
Author(s):  
I. V. Radhakrishna Murthy ◽  
P. Rama Rao ◽  
P. Ramakrishna

1990 ◽  
Vol 25 (9) ◽  
pp. 1023-1027 ◽  
Author(s):  
Pan Feng ◽  
Liang Jinkui ◽  
Su Genbo ◽  
Zhao Qinglan ◽  
He Youping ◽  
...  
Keyword(s):  

2011 ◽  
Vol 291-294 ◽  
pp. 349-354
Author(s):  
Guang Lin He ◽  
Xiao Lin Li

The influence of centerline and the cross-section variation to aerodynamic performance of the inlet was researched in a wider range. A new method of measuring the total pressure recovery coefficient and total pressure distortion coefficient of the inlet was proposed. Based on the loitering aircraft, a s-shaped inlet was designed to meet the needs of stable flight of loitering aircraft, whose total pressure recovery coefficient is 93.2% and total pressure distortion coefficient is 1.2%.


2010 ◽  
Vol 25 (21n23) ◽  
pp. 1903-1906
Author(s):  
TAKUMA MATSUMOTO ◽  
KIYOSHI KATŌ ◽  
MASANOBU YAHIRO

We present a new method of smoothing discrete breakup cross sections calculated by the method of continuum-discretized coupled-channels. In the four-body breakup reaction of 12 C (6 He , nn4 He ) at E in = 229.8 MeV , the continuous breakup cross section is evaluated as a function of the excitation energy of 6 He . Convergence of the cross section with respect to extending the modelspace is also confirmed.


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