The result is helpful for the specimen analysis and process when instrument is out of order in observation station, as well as the short-term and emergent trace monitoring in special condition.

We can see from the 30 years'practice that electric survey still plays an important role in making areal reconnaissance, locating local rise of high resistance beds and researching into electric fault plane under specific condition.

Owing to the use of magnetic field formula of triangular magnetic charge plane under special conditions, to form the total magnetic field of magnetic body, the computing formula is simmple.

In this paper, according to the actually tested data and experiment results, the authors probed the efficiency for applying the surface geochemical exploration in Qinghai Tibet Plateau, especially under the conditions of hydrocarbon source rocks being widely exposed.

The above four factors affect color, transparency, shape, size of sapphires, and reduce grade of sapphires. In some special conditions, the factorscan also form rare varieties such as star sapphires, fantasic - color sapphires, variegated sapphires, etc.

At its front, a special condition is fulfilled; namely, a smooth transition to the nonperturbed value of the strength of the electric field induced by an external perturbation.

Additional degrees of freedom that arise in the process are excluded by a special condition that is natural for the mixed finite element approximations considered.

In this paper, we focus on the structure of p-blocks with defect group satisfying some special condition.

Under the special condition, the artificial activity is possibly the key function.

In step 4 the probability is determined with which a special condition or a group of circumstances could become a clinically relevant risk factor.

China started its oil electric survey in 1952. The number of electric survey crews reached 36 by the end of 1950's. Because the main prospects changed from the Northwest to the East of China in early 1960's, and later affected by the "culture revolution", the electric survey crews greatly decreased in number and many crew members Changed their profession. 5 electric survey crews were reestablished at the beginning of 1970's. The crews conducted not only conventional electric prospecting but also the experiment...

China started its oil electric survey in 1952. The number of electric survey crews reached 36 by the end of 1950's. Because the main prospects changed from the Northwest to the East of China in early 1960's, and later affected by the "culture revolution", the electric survey crews greatly decreased in number and many crew members Changed their profession. 5 electric survey crews were reestablished at the beginning of 1970's. The crews conducted not only conventional electric prospecting but also the experiment of direct detecting oil. The electric surveyors have studied certain applied theory of electric prospecting and therefore developed a complete set of digital processing programs. We can see from the 30 years'practice that electric survey still plays an important role in making areal reconnaissance, locating local rise of high resistance beds and researching into electric fault plane under specific condition. It is suggested that magnetotelluric sounding, artificial electric field sounding and other electric prospecting methods should be actively developed, and their comprehensive applications emphasized.

This article explains the method of the computing magnetic field by the surface integration, i. e. H=-ρ∫s grad (1/R) ds. Owing to the use of magnetic field formula of triangular magnetic charge plane under special conditions, to form the total magnetic field of magnetic body, the computing formula is simmple.This article also presents the transfer matrixes of three-dimensional coordinates of magnetic field and coordinates of points in space. And also the method of treating the computed points in special cases....

This article explains the method of the computing magnetic field by the surface integration, i. e. H=-ρ∫s grad (1/R) ds. Owing to the use of magnetic field formula of triangular magnetic charge plane under special conditions, to form the total magnetic field of magnetic body, the computing formula is simmple.This article also presents the transfer matrixes of three-dimensional coordinates of magnetic field and coordinates of points in space. And also the method of treating the computed points in special cases. Finally, in this paper, the model of thismetnod and calculated example of actual mine and computing-program flow chart in this method are given.

The quantitative use of Mssbauer spectroscopy is based on the formula S_a/S_b= (C_aC_b/)·(N_a/N_b). Theoretically, if the concentrations of two types of iron atom, N_a and N_b, are known, the relative intensity coefficient (C_a/C_b) will be able to be obtained through experimental determination of the Mssbauer intensities S_a and S_b. In fact, it would often involve difficulties. In the present paper three (C_a/C_b)coefficients are obtained under the following special conditions:1. Four pure minerals, ankerite,...

The quantitative use of Mssbauer spectroscopy is based on the formula S_a/S_b= (C_aC_b/)·(N_a/N_b). Theoretically, if the concentrations of two types of iron atom, N_a and N_b, are known, the relative intensity coefficient (C_a/C_b) will be able to be obtained through experimental determination of the Mssbauer intensities S_a and S_b. In fact, it would often involve difficulties. In the present paper three (C_a/C_b)coefficients are obtained under the following special conditions:1. Four pure minerals, ankerite, olivine, andradite and almandite, were collected, each of which contains the only valence state of iron and gives the only quadrupole doublet in the Mssbauer spectrum.2. The iron concentrations of the minerals were precisely determined by wet chemical analysis.3. Mixture absorbers were prepared, each of which consists of two of the four above-mentioned, minerals, and the contributions N_a and N_b of the two minerals to each absorber with respect to its iron concentration (N_a+N_b) were known with N_a/N_b1.