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181. Coefficient formulae derived belong to forms of the sine function. 182. Based on the ring geometrical model, the calculation formulae of ring diameters were de rived and the relations between ring diameters, thickness and the rolling feeding amount were established. 183. Basic formulae of measuring antenna gain by using the sun source are described simply. 184. Although the objects processed by a computer algebra system are usually symbolic formulae, it is necessary for the system to operate with integers and even with infinite integers. 185. This method has simple formulae and some learning ability, while combining with other technologies, it can get a good result for Chinese name identification. 186. In this paper, the formulae of hydraulic resistance for this naval gun's recoil mechanism is derived so that necessary technique can be provided for the reverse design to this naval gun. 187. It is proposed to use the energy concentration factor and directivity factor as indication of the directivity of the array, and formulae as well as the way of using them are presented. 188. The stress concentration factor of any notched specimen can be calculated using these formulae with high precision, less error as only 1 and convenience in use. 189. Some corresponding mechanics calculating formulae of output force and force amplifying coefficient are also given. 190. The general and the recurrent formulae of the superposition principle are proved. 191. In order to supply the theoretical basis, the formulae for calculating the deformation, stresses and effective area of the conical welded bellows are derived. 192. Markowitz formalised these ideas and drew up the mathematical formulae to optimise diversification. 193. Several calculating formulae for critical failure force are proposed for engineering purposes. 194. Their properties were characterized by using integral transformation and matrix theory. Two biorthogonality formulae for the multiple vector-valued multivariate wavelet packets were obtained. 195. But the artificial language expression formula which portrays these three laws has particularity , apply different expression formulae in different thinking science to portray. 196. When the state process has Markov property, the recursive formulae for the conditional distribution density functions of filtering, prediction. and interpolation, are given respectively. 197. In this paper, based on experiment verification, more precise formulae, air gap magnetic conductance and leakage magnetic conductance, can be obtained using the results of magnetic field. 198. These formulae can be used as an analytic solution for quickly estimating the geometric aberrations of a known deflection system and checking the related computer program. 199. This paper deals with the necessary pressure for casting fiber-reinforced metal-matrix-composites from two aspects of hydrostatics and hydrodynamics and the formulae of compute are given. 200. Although the chemical formulae of indirubin and indigotin are the same but the structures are different, and indigotin does not possess the anti cancer characteristics. 201. With the variable replacement method, general solution formulae were given to the linear differential systems with complex constant coefficients and that with a class of complex variable coefficients. 202. A new type of structure of the trimming dies and the formulae for designing the cutting edge of the dies are put forward, the manufacture process and the seriation of the dies are discussed. 203. This paper expounds the importance scientific sublation plays in inducing the formulae of derivation and physical entropy, and examines the interrelation and relevance of entropy in different fields. 204. In this paper, a set of important formulae for burnup determination of fuel element from HFETR are deduced and researched, and main formulae of ASTM E244 are reformed. 205. These formulae is not only useful for design but also helpful in evaluation of the parameters in nonlinear dynamic analysis of lead-rubber bearings. 206. Explicit iterated integral formulae of the moments in various order of the hitting times of geodesic spheres by Brownian motions on rotationally symmetric manifolds are given in this paper. 207. Formulae for calculating the magnetic field generated by current in a rectangular bus-bar are derived. 208. The regression formulae were obtained to determine elastic buckling coefficients of the forementioned rectangular plates. 209. Every element of a magic square can be found by calculating with the formulae in the method when its row number and column number in the square are given. 210. I was so nervous that I even forgot the simplest definitions and formulae.