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Ultra-high density resistivity method is a completely new resistivity investigation technique, by laying out electrodes at one time, it can acquire potential information from any combined electrodes, the acquired information is 40 times of the conventional high-density resistivity method, then the section's resistivity value can be acquired via utilizing 2.5-D inverse analytical method, in this way,...
Weight reflects the essentiality of an index in index volume. Presented a method of determine index weight in security risk evaluation (SRE) based on information entropy. It is a kind of structure analysis method, which constituted entropy model for security risk evaluation of information system and defined subjection function in the first instance, shaped subjection degree matrix of experts' ideas...
The traditional Finite Element Method (FEM) and Statistical Energy Analysis (SEA) are widely used in predicting structure noise of vehicles. However, these two kinds of methods both have defects in solving the Mid-Frequency problems. In this work, a hybrid FE-SEA vehicle modal is built to analysis the structural-acoustic system over frequency range 200–500 Hz. Experiments are carried out to acquire...
Bifurcation theories are widely applied in the analysis of both static and dynamic characteristics of power systems for they can be of tremendous value for our understanding of the instability issues of a power system. In this paper, the dynamic characteristics of a power system with HVDC transmission system has been studied with nonlinear bifurcation theory, in addition, eigenvalues analysis and...
Aim: To study the effect of Geraniin on the expression of P53 genes in human hepatoma HepG2 cells. Methods: Cell survival was measured using MTT metabolic viability assay. Apoptosis of HepG2 was investigated by DNA gel electrophore; The level of P53 gene expression was measured by reverse transcription polymerase chain reaction (RT-PCR) and Western blotting analysis after the HepG2 cells were treated...
Aim: To study the anti-tumour effect of Geraniin isolated from Agrimonia pilosa ledeb. Methods: MTT was used to study anti-tumor effect of Geraniin in vitro. Morphological observation of the cells was completed by fluorescence microscope. The effect of Gerannin on cell apoptosis in human gastric carcinoma SGC-7901 cells was studied by flow cytometry. Results: The proliferation of SGC-7901 cells was...
The developments of Chinese pharmaceutical enterprises in the process of the Third-Party Logistics industry, specifically the existence of some key issues were analyzed, and the Third-Party Logistics was proposed to improve the levels of Chinese pharmaceutical enterprises development measures, based on analyzing the implementation of SWOT strategy in pharmaceutical enterprises.
According to the present High Frequency (HF) Air-Ground Communications, interpolation algorithm is used to ascertain the distribution of every channel's SNR along time on the route. A new ALE scan list updating strategy that is based upon the order of SNR is achieved according to the distribution of SNR. Meanwhile, the evaluation standards of performance are given. This paper also constructs the theoretical...
With the excellent ability of anti-jamming, the traditional transform domain communication system (TDCS) is limited in wide application due to the same electromagnetic environment between the transmitter and the receiver. Based on the traditional TDCS, a long-distance aviation transform domain communication system (LDA-TDCS) is presented to realize the aviation communication under complex electromagnetic...
This paper summarizes some improved methods of particle swarm optimization (PSO), analyses its critical reasons in convergence dilemma, and then puts forward local optimum embranchment optimization method and local depth optimization method according to the characters of transmission network expansion planning. Numerical simulation results demonstrate these two methods can not only overcome the convergence...
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