Let Δ 2 n={(x,y):x,y∈Z, 1≤x≤n, 1≤y≤n} be the set of integer lattice points . If P and Q are two points in Δ 2 n , we say that P and Q are visible from each other if P=Q or there is no any other lattice point of Δ 2 n on the line segment joining P and Q .

We introduced the normalized coefficient Y_a, Y_s of stress intensity factor on the two points to obtain, a series of data Y_2, Y_s corresponding to surface crack shapes a/c and relative depth a/r.

Effects on the precision of NRTL model predicting multicomponent VLE data containing salt are discussed with relations to two points:the different definitions of salt concentration and the adjustable energy parameters which are considered as a function of concentration.

In order to obtain the field strength at the distance of 1.1km and 2.1km away from the railway, we discussed the field from two points of view: theoretical calculation and actual measurement.

Introduce construction design of CD/DVD anti-vibration,including construction design of U-tape frame and CD deck bracket,major introduce two points about flexblity and retard concussion of part design.

Beginning with and based on this correspondence, the thesis focuses on the following two points:1) Causes of the correspondence between DV+SN and attributive-head structure:The nature of "2+1" syllable combination (2+1 hereafter) accounts for the correspondence.

This paper analyses the coal resource position of China and suggests the work targets and the main tasks of geology domain of coal resource,from two points of basic theory and the key technique.

Jiaozhou Bay is a gulf opening to Yellow Sea,which is enclosed by land of Qingdao and a connecting line of two points,the Tuandao Tou(36°02′36″N, 120°6′49″E)and the Jiaozi Stone of Xuejia island(36°00′53″N,120°17′30″E1)There are harbors that can support vessels with weight of l 00 million ton in the Bay.

The plasma potential at the core of the MM4 plasma is V(P4)=-82±9-122±12V,while those at two points (The east core and the west core) of the MM-4U are V=52.9±3.2V and V,=-62±3.2V, respectively.

By analyzing the development path of R&D/GDP and basic research/ R&D in three types of country, it is inducing their approximate S curve, pointing out that 1 0% and 2 5% are two points of inflection in the curve of R&D/GDP and 8% and 15% in basic research/ R&D.

The exponential convergence rate in entroy is studied for symmetric forms, with a special attention to the Markov chain with a state space having two points only.

The surface of body is such that the axis of rotation has two "points," where the plane tangent to the surface is not specified.

Self-similar solutions of the equations of a three-dimensional laminar boundary layer are of interest from two points of view.

An equation is obtained for the probability distribution of the velocity difference at two points.

This paper based on the author's work [6] makes a detailed examination of the two-dimensional problem of separationless flow past a shell filled with gas, fixed at one point and at two points.

In this paper the writer employs complex Riemannian Geometry and defines the absolute interval between two points as consisting of a real part and an imaginary part. Two postulates (I) and (II) are used: the first may be called law of gravitation and electro-magnetism; the second equation of motion. In the absence of electromagnetic phenomena the theory reduces practically to Einstein's theory.

In recent years, Prestressed Concrete long piles are universally adopted. Last year such kind of pile with length up to 27~M have been produced in this country. Now in order to meet the requirements of Shanghai Harlour works and Yangtze River Bridges, we work out a new type of prestressed concrete hollow pile of 36~M long, with a cross-section, of 55 cm square (inner diameter 40 cm.) By using temporary prestressing fittings on pick points with automatic adjustment for prestress, the pile is suitable for two...

In recent years, Prestressed Concrete long piles are universally adopted. Last year such kind of pile with length up to 27~M have been produced in this country. Now in order to meet the requirements of Shanghai Harlour works and Yangtze River Bridges, we work out a new type of prestressed concrete hollow pile of 36~M long, with a cross-section, of 55 cm square (inner diameter 40 cm.) By using temporary prestressing fittings on pick points with automatic adjustment for prestress, the pile is suitable for two points pick, which gives great facilities to handling and transpotation. Besides, 18% of steel saving can still be made. This paper only presents the principle and calculations. The testing results will be given later.

Three hundred and eleven herb drugs (most of which are used in chinese medicine) and 47 composite recipes were screened for antitumor activity in animals. The drugs or recipes were selected from those commonly used in Chinese medicine in the treatment of neoplasms or tumorous diseases or from drugs that belong to the same genus or the same species as certain known antitumor herbs. The preparations employed included decoctions, tinctures, extracts, electrophoretic fractions and such constituents as alkaloids,...

Three hundred and eleven herb drugs (most of which are used in chinese medicine) and 47 composite recipes were screened for antitumor activity in animals. The drugs or recipes were selected from those commonly used in Chinese medicine in the treatment of neoplasms or tumorous diseases or from drugs that belong to the same genus or the same species as certain known antitumor herbs. The preparations employed included decoctions, tinctures, extracts, electrophoretic fractions and such constituents as alkaloids, essential oils, glycosides etc. Ehrlich carcinoma (both the ascitic and the solid from) and sarcoma 180 were routinely employed for the screening; whereas other mouse tumors including spindle-cell sarcoma, sarcoma AK, reticulo-cell sarcoma L_2, sarcoma B_(22) and spon- taneous carcinoma of the breast, as well as rat tumors, Yoshida ascites sarcoma and Walker carcinoma 256 were also used in some of the tests. The drugs were given once daily and, with a few exceptions, for 6—14 days. Essential oils and soluble crystalline substances were given intraperitoneally or subcutaneously while the rest were administered through stomach tube. Inhibition of tumor growth by 30% or more in the case of solid tumors or prolongation of survival by 3 days or more in the case of ascites tumors were taken as the criteria for antitumor activity. Of the 358 preparations screened 3 (0.8%) showed definite antitumor effects, namely the essential oil of Atractylodes macrocephala Koid (白术), the tincture of Bombyx batryticatus (殭蚕) and Ye Ke San (a composite recipe meaning "powder for dysphagia"), 350 were ineffective and the results of the remaining 5 were inconclusive. Contrary to our experimental data clinical observations on neoplastic patients have claimed encouraging results for many of the composite recipes tested in the present investigation. As the assessment of antitumor therapy requires large scale and prolonged observations, further clinical and experimental investigations are necessary before definite opinions on the effectiveness of these recipes are to be expressed. The question arises as to the cause of the low incidence of positive screening results. To the authors, two points seem to be worthy of consideration. Firstly, in the crude preparations, like decoctions and extracts, effective antitumor contituents, if present, most likely exist in very low concentrations, and sometimes may even be lost or inactivated during processing. Secondly, the nature, actions and potency of the crude preparations are subjected to the influences of a number of variables. These include differences or irregularities in species, district of cultivation, time of harvesting and conditions of preservation and preparation. The non-uniformity of even one of these variables may introduce significant differences in the quality of the final preparation and this in turn would lead to variability of the screening results and difficulty in assessing the antitumor effects. It would be preferable to extract the crystalline constituents of the herb drugs for antitumor screening experiments or as an alterative to make refined preparations from which certain "inactive" constituents like tannins, sugars, gums etc. are removed so as to render concentration of the effective constituents possible.