Papers by Keyword: Coherence

Abstract: For small faults have great influence on remaining oil distribution and injection-production relation in the latter period of high water-cut oilfield, an accurate distribution of these minor faults is one of the main control factors of injection-production adjustment. So, the little fault location predication accurately is necessary. But, research that only rely on logging data description of fault and reservoir characteristics have certain limitation, especially in the fault-points, crosswell faults combination and extension length, plane position and continuity between wells sand body, etc. The seismic forward modeling analysis, 3D visualization, various fault classification identification describe integration technology was used, and the fine structure interpretation method was formed, which integrated technology of the first big to small, first simple to complex, slice confirm fault strike, seismic section ensure fault dip, common fixed fault attitude. Fault The remaining potential of fault nearby, crosswell sand body and enlarge transitional are developed by reunderstanding reservoir which was studied in well-seismic interpretation technology. It’s important to improve the fine remaining oil descriptiont for further increaseing understanding of reservoir and of high water-cut old oilfields.

Abstract: This paper analyzes the principles of signage system design, especially the principle of standardization and how to use it to improve the design. Except the study about the elements of system, this paper also analyzes the coherence of the whole system .This shows another perspective of the signage system design.

Abstract: Monitoring of fluidized beds operation is important in industrial applications. Collecting fluidize bed wall vibration is a non-intrusive method that can be used to characterize bed hydrodynamics. In the present work, the vibration of a lab-scale fluidized bed was measured at different operating conditions as well as the empty bed. It was shown that vibration of the empty bed is as significant as that of the fluidized bed. Therefore, the vibration signal was decomposed into two distinct signals, coherent and inherent signals. The inherent signal was used to reflect the bed hydrodynamics. The power spectral density of inherent vibration signal showed that the increasing aspect ratio of the bed leads to an increase in the intensity of vibrations especially at high frequencies. Moreover, there are first, second and so forth harmonics for which their intensities decrease as the frequency is increased.

Abstract: In many previous studies, neuronal oscillations in humans under 1530 Hz activity have been observed, correlated with rhythmical motor output. In this present study, we observed the influence of non-rhythmical paroxysmal stimulation on cortical neurons by analyzing the coherence between electroencephalogram (EEG) and electromyogram (EMG). The non-rhythmical stimulation was performed by using this method that the braced force of the subjects one foot was released suddenly when the subject was standing still. The surface EMG signals from the tibialis anterior and the gastrocnemius muscles of 10 healthy subjects were recorded, and the cortical activities of contralateral cortical sensorimotor areas were also recorded simultaneously by EEG during the experiment. The data indicates that the range (10-25Hz) synchronization represents a state of the cortico-muscular network when the balance is broken which the braced force of subjects one foot is released suddenly.

Abstract: For any company, it so important that the management takes the right decisions when there are established the different policies (production, marketing, sales etc) to optimize the efficiency and profitableness of the company. In the paper we introduce a decisional method, based on risk and uncertainty, which allows to analyze the decisions in 3 phases, offering the possibility to take a more accurate decision.

Abstract: Photosynthesis is a wonderful phenomenon which is present in green plant. In recent years, it has been discovered that there is entanglement in the biological pigment protein complexes, and that may be the reason of high transport efficiency. And coherence also plays an important role during the process of this efficiency energy transport. However, some scientists consider that it is not at all clear entanglement exists in the FMO complex, or unlike coherence, its role for the transport efficiency seems to be irrelevant. This paper mainly introduces what progress have scientists made during the past few years.

Abstract: Dispersion characteristics for AC charging pile distribution and monitoring of electric vehicles in mobile state, it proposes a communication method with the server by centralized GPRS module and Electric Vehicle Terminal (EVT). In order to meet the design requirements of the comprehensive monitoring system for remote access, system uses Struts, Spring and Hibernate framework based on Browser/Server (B/S). Network servers use weblogic cluster together with the Oracle database server and Coherence real-time database to meet the high number of concurrent users. Client pages are based on the full-featured ExtJs library with beautiful interface. The system consists of five functional modules, which are structured and closed contact with each other. Test results show that the system is stable and the average response time is short.

Abstract: In the introduction to this dissertation, one flowing algorithm is proposed in this paper considering the SAR Interferometry. The basic idea of this algorithm is that we can adopt the same imaging parameters, such as the doppler centroid, etc. when converting the two raw data from signal information to images for Interferometry. ERS-1/2 Tandem 0 level data in Zhangbei have been tested in this artic, the better phase fringes could be acquired compared with standard 1 level SLC data provided by ESA process station. The experimental result indicates the proposed method is highly desirable for research and application for InSAR technology.

Abstract: A specific issue in seismic analysis of large span bridge, study on inconsistent ground motion input is reviewed in this paper. The building of spatial model for ground motion field based on observation of motions on dense arrays and coherence validation of the synthesized ground motion field are deal with respectively. Points are emphasized that spatial correlation between motions with distance of several hundred meters to each other comes from one same source and very similar path, similar/different site condition. A comprehensive procedure taking source, path and site condition all into account to synthesize the motion field is convenient to reveal and express the physical nature of the motion field. Spatial structure of a synthesized motion field is validated by means of the coherency coefficients. The result is consistent with the conclusion from the statistics of the observed data on some dense arrays.