In the first place, we introduced the data structure about GenBank indetails and analyzed the dictionary of SNP database and the relation amongdata dictionaries. Then a secondary local SNP database was built on basisof information and biological data provided by GenBank. All the data inSNP database were taken from GenBank.

The southern sag in Yanqi basin, a secondary structural unit in the southern part of Bohu depression, has certain exploration potentials, with Jurassic as its major exploration target.

Maqiao salience is a secondary tectonic unit in the central depression area of Jungar Basin, which is a newly found important oil and gas exploration area with good prospects of oil and gas.

The behaviour of electrical conductivity and heat capacity of fast ionic conductor Rb_4Cu_(16)Cl_(13) has been studied in the temperature range -170-100℃. The results most likely show that this material undergoes second order phase transitions at about -26℃, -50℃ and -110℃ respectively.

Biological Evaluation of a Secondary Metabolite, 9-O-methylfusarubin, from Fusarium oxysporum

koraiensis virgin forest amounted to 98168 mm during a growing season (May to September), which was 19.6 per cent of the total rainfall and 1.3 times that of a secondary Betula platyphylla forest.

We analyzed a bird community in a secondary forest and the results show that the magpie was one of the key groups in the secondary forest.

The occurrence of four main formation periods in association with five main reconstruction periods, results in a secondary origin for the most marine gas pools in South China.

It is suggested that at pH >amp;lt; 7.0 the photoaccumulated PH is irreversibly converted into a secondary, most probably protonated form, that does not lead to destruction of the RCs but prevents the photoformation of the primary radical pair [P680+PH].

In this paper, a direct integration method used to solving non-linear structural dynamic differential equations, in which the acceleration is appr- oximated by second order polynomial of time interval is proposed. This method is unconditional stable no matter whether the physical damp- ing of the structure system is large or small so long as it exists. It possess third order accuracy and better arithmetic damping property. The effects of decay in amplitude and extension in period are remarkable on higher mode...

In this paper, a direct integration method used to solving non-linear structural dynamic differential equations, in which the acceleration is appr- oximated by second order polynomial of time interval is proposed. This method is unconditional stable no matter whether the physical damp- ing of the structure system is large or small so long as it exists. It possess third order accuracy and better arithmetic damping property. The effects of decay in amplitude and extension in period are remarkable on higher mode and very little on lower mode. Moreover, there is also no "over shoot", phe- nomenon in this method. In solving n degree of freedom structual dynamic problems by this method, when either the step length of time, structure rigidity or damping is changed, it needs to solve 2n×2n algebrac linar equations in one step. If all the step length of time, structure rigidity and damping are not changed, it needs only to complete the back substitution solving procedure in Gauss elimina- tion. This method has remarkable better properties than all other direct inte- gration methods existed.

Wilson 's θ-method is well known and is effectively used in the domain of structural dynamic analysis. An improvement is made in this paper in order to get more accurate results and to accelerate the convergence of the dynamic equations. The main idea is that the acceleration should be approximated in the time interval by a quadratic form:The accuracy is raised to O(Δt3 ) instead of O(Δt2 ) in the Wilson's method.The stability of the method is unconditional. In the sense that the physical damping of the structure...

Wilson 's θ-method is well known and is effectively used in the domain of structural dynamic analysis. An improvement is made in this paper in order to get more accurate results and to accelerate the convergence of the dynamic equations. The main idea is that the acceleration should be approximated in the time interval by a quadratic form:The accuracy is raised to O(Δt3 ) instead of O(Δt2 ) in the Wilson's method.The stability of the method is unconditional. In the sense that the physical damping of the structure system can either large or small so long as it exists. It has an accuracy of third order and a better arithmetic damping property. The effects of decay in amplitude and extension in period are remarkable on higher modes and very little on lower modes. Moreover, there is also no ' over shooting ' phenomenon in this method.In solving n degree of freedom structural dynamic problems by this method, when the step length of time, the structural rigidity or the damping is changed, it needs to solve 2n × 2n algebraic linear equations in each step. If all the step length of time, the structural rigidity and damping are not changed, it needs only to accomplish the back substitution solving procedure in Gauss elimination. This method has remarkable better properties than all other direct integration method.In the end of this paper numerical examples which are used to compare with other method are given.

In this paper,a mathematical model for comprenensive judgement is given. Let X be a finite set of objects,U be a finite set of factors,|U|=m,and R be a fuzzy relation on X x U.The triple(X,U,R)is called a judgement space.In a judgement function f.[0,1]→R,the conditions of regularity,monotonicity and continuity must be satistied.We have proved that,under certain additive pos- tulates,the judgement function f(z_l…,z_m)can be expressed asaz,(aA z) andz_i~a respectively.Finally,a method of ordering by applying the...

In this paper,a mathematical model for comprenensive judgement is given. Let X be a finite set of objects,U be a finite set of factors,|U|=m,and R be a fuzzy relation on X x U.The triple(X,U,R)is called a judgement space.In a judgement function f.[0,1]→R,the conditions of regularity,monotonicity and continuity must be satistied.We have proved that,under certain additive pos- tulates,the judgement function f(z_l…,z_m)can be expressed asaz,(aA z) andz_i~a respectively.Finally,a method of ordering by applying the second grade judgement has been suggested.

本文给出综合评判的一个数学模型。设 X 是有限对象集,U 是有限判据集,|U|=m,R 是 X×U 上的模糊关系,三元组(X,U,R)称为评判空间。评判函数 f:[0,1]~m→R 应满足正则性、递增性和连续性等条件,借助评判函数可对 X 中的对象排序。我们证明了:在一定的附加条件下,评判函数f(z_1,……,z_m)可分别表为 sum from i=1 to m a_iz_i,(a_i)和。最后提出一个二级评判的方法。