The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The generation mechanisms of complex fracture mesh and the mechanism of activating existing natural fractures during shale fracturing are studied based on rock fracture dynamics. It is found that steering conditions should be satisfied at both the left and right ends of a natural fracture to form an intensive fracture mesh after the induced hydraulic fracture reaches the natural fracture; there exists...
For the intelligent surface plasmon resonance biochemical analyzer, we have discussed the problems of the control parameters selected using fuzzy control filtering approach based on the grid fractal dimension theory after the analysis of the SPR signal noise characteristics, and designed a piecewise function model between the fuzzy control parameter and the fractal dimension. On experimentally measured...
Provenance of data describes the process of the generation and transformation of the date, which is used in data mining, data verification, data recovery and reference and some other areas. For uncertain data, provenance plays an important role in query and analytical processing. K-anonymous data is a special kind of uncertain data, which is derived according to the generalization tree by the definite...
In recent years, anonymization methods have emerged as an important tool to preserver individual privacy when relasing privacy sensitive data. All of these methods are under different privacy and utility assumption. But there has been little research addressing how to effectively use the anonymized data for data mining. Data mining is one of problems for the utility of anonymized data under the k-anonymity...
The numerical simulation of elastic waves by the staggered grid finite difference method is researched to improve the simulation precision and efficiency, in addition, to decrease the numerical dispersion and spurious wave. Based on the velocity-stress staggered grid technique, we designed a two dimensional finite difference program with the accuracy of 0(Δ t2 + Δ x4). More stable condition and an...
Schema matching is a basic problem in many application fields as fundamental operation of schema. This paper analyses the advantages and limitations of iMAP and CM, and proposes an extended schema matching system architecture between Database Schemas (ESM). First, ESM filters unreasonable matches by preprocess and clustering process. Then it employs a set of special-purpose searchers to explore a...
De-excitation with varistor parallel connected to field winding for large generators has been widely used. However, field current and voltage become quite large for larger generators, such as 700 MW generator for Three-Gorge power plant, China. In order to put varistor into operation during de-excitation requirement for opening arc-voltage of dc field breaker is high and high. This causes big size,...
Schema matching, the problem of finding semantic correspondences between elements of two schemas, plays a key role in many applications. Currently, schema matching is largely performed manually by domain experts, thus a time-consuming and labor-intensive process. In this paper, an improved schema matching algorithm is proposed based on Similarity Flooding (SF for short) algorithm, which is an optimized...
A new method for cell recognition by using electrolyte-insulator-semiconductor (EIS) structure sensor, the light-addressable potentiometric sensor (LAPS), integrated with a bio-sensitive membrane is elaborated. The structure of LAPS is Si3 N4/SiO2/Si. And the phage probe specific to the transferring breast cancer cell, MDAMB231, which is prepared by phage display is used as the bio-sensitive membrane...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.