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Search Results: 1 - 10 of 148128 matches for " Lu Wang "
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Study on the Cooperation Mechanism of Nansha Area and National Free Trade Areas along “The Belt and Road”
—Taking Financial Business as an Example
 [PDF]

Lu Wang
Open Journal of Social Sciences (JSS) , 2018, DOI: 10.4236/jss.2018.64009
Abstract:
This paper investigates the development orientation, advantages and features of the Free Trade Zone Nansha Area, combs through the development and experience of national free trade areas (FTAs) along “the Belt and Road”, analyzes the comparative advantages between the two and explores the cooperation in the following areas: management inspiration of the national FTAs along the “the Belt and Road” to the Nansha area; fields and patterns of cooperation between national FTAs along “the Belt and Road” and Nansha Area to help Chinese enterprises “go out” to countries along “the Belt and Road”; the contents of the key industry positioning and cooperation in the Nansha Area on the basis of the cooperation with the national FTAs along “the Belt and Road”.
Comparative Study and Analysis of the Development of Shale Gas between China and the USA  [PDF]
Qianqian Wang, Lu Wang
International Journal of Geosciences (IJG) , 2016, DOI: 10.4236/ijg.2016.72016
Abstract: In the 21stcentury, the shale gas is a greatly potential unconventional gas resource, which can serve as an important complement to conventional energy sources, and can effectively alleviate the energy pressure of the world. The development of shale gas in the USA is in the developing stage with advanced exploitation technology and huge reserves. Compared with the USA, the development of shale gas in China is still in the early stage. The development of shale gas is both an opportunity and a challenge. Chinais in the exploration and preparation stage of resource assessment and exploration. This paper presents the importance of the formation principle of shale gas and the energy application, and compares the progress of shale gas studies, exploitation technology as well as the study hot-points betweenChinaand theUSA. Meanwhile, this paper states the difficulties and challenges with the development of shale gas inChina.
Prediction of the Favorable Area for the Development of Fracture in Mud-Shale of Wufeng-Longmaxi Formation in Jiaoshiba Area, Sichuan Basin  [PDF]
Qianqian Wang, Lu Wang
Open Journal of Geology (OJG) , 2016, DOI: 10.4236/ojg.2016.63014
Abstract: The main reservoir stratum of shale gas in the Jiaoshiba area, Sichuan basin is Wufeng-Longmaxi Formations. This paper calculates the tectonic difference stress values of JY1 well in different depths and numerically simulates the shale gas reservoir by elasto-plastic incremental method. The results of tectonic difference stress value suggest that the present tectonic stress values distribute strippedly in plane. The areas in favor of the development of fractures are stripped and mostly distributed in the northeast, middle and southwest of Jiaoshiba area, where the shale gas is concentrated.
Modern Technology for Acupuncture Research: A Short Review from the Medical University of Graz  [PDF]
Lu Wang, Gerhard Litscher
Chinese Medicine (CM) , 2010, DOI: 10.4236/cm.2010.13012
Abstract: This short review article gives a brief description of the TCM Research Center Graz, especially the part of high-tech acupuncture research. A new technology for non-invasive acupuncture stimulation using violet laser (405 nm, 110 mW, 500 µm) is described. With this kind of laser it is possible to induce a so-called Deqi sensation which is very important in Chinese acupuncture. The second part of the review paper describes the new teleacupuncture which has been performed for the first time between the China Academy of Chinese Medical Sciences and the TCM Research Center Graz at the Medical University of Graz.
High Resolution MIMO-HFSWR Radar Using Sparse Frequency Waveforms  [PDF]
Guohua WANG, Yilong LU
Wireless Sensor Network (WSN) , 2009, DOI: 10.4236/wsn.2009.13021
Abstract: In high frequency surface wave radar (HFSWR) applications, range and azimuth resolutions are usually lim-ited by the bandwidth of waveforms and the physical dimension of the radar aperture, respectively. In this paper, we propose a concept of multiple-input multiple-output (MIMO) HFSWR system with widely sepa-rated antennas transmitting and receiving sparse frequency waveforms. The proposed system can overcome the conventional limitation on resolutions and obtain high resolution capability through this new configura-tion. Ambiguity function (AF) is derived in detail to evaluate the basic resolution performance of this pro-posed system. The advantages of the system of fine resolution and low peak sidelobe level (PSL) are demon-strated by the AF analysis through numerical simulations. The impacts of Doppler effect and the geometry configuration are also studied.
Neural Network Based Missing Feature Method For Text-Independent Speaker Identification  [PDF]
Ying WANG, Wei LU
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2010, DOI: 10.4236/ijcns.2010.31005
Abstract: The first step of missing feature methods in text-independent speaker identification is to identify highly corrupted spectrographic representation of speech as missing feature. Most mask estimation techniques rely on explicit estimation of the characteristics of the corrupting noise and usually fail to work with inaccurate estimation of noise. We present a mask estimation technique that uses neural networks to determine the reliability of spectrographic elements. Without any prior knowledge of the noise or prior probability of speech, this method exploits only the characteristics of the speech signal. Experiments were performed on speech corrupted by stationary F16 noise and non-stationary Babble noise from 5dB to 20 dB separately, using cluster based reconstruction missing feature method. The result performs better recognition accuracy than conventional spectral subtraction mask estimation methods.
Two Implicit Runge-Kutta Methods for Stochastic Differential Equation  [PDF]
Fuwen Lu, Zhiyong Wang
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.310162
Abstract: In this paper, the Ito-Taylor expansion of stochastic differential equation is briefly introduced. The colored rooted tree theory is applied to derive strong order 1.0 implicit stochastic Runge-Kutta method(SRK). Two fully implicit schemes are presented and their stability qualities are discussed. And the numerical report illustrates the better numerical behavior.
Investigation of Low Rank Coal Gasification in a Two-Stage Downdraft Entrained-Flow Gasifier  [PDF]
Xijia Lu, Ting Wang
International Journal of Clean Coal and Energy (IJCCE) , 2014, DOI: 10.4236/ijcce.2014.31001
Abstract:

Low-rank coal contains more inherent moisture, high alkali metals (Na, K, Ca), high oxygen content, and low sulfur than high-rank coal. Low-rank coal gasification usually has lower efficiency than high-rank coal, since more energy has been used to drive out the moisture and volatile matters and vaporize them. Nevertheless, Low-rank coal comprises about half of both the current utilization and the reserves in the United States and is the largest energy resource in the United States, so it is worthwhile and important to investigate the low-rank coal gasification process. In this study, the two-stage fuel feeding scheme is investigated in a downdraft, entrained-flow, and refractory-lined reactor. Both a high-rank coal (Illinois No.6 bituminous) and a low-rank coal (South Hallsville Texas Lignite) are used for comparison under the following operating conditions: 1) low-rank coal vs. high-rank coal, 2) one-stage injection vs. two-stage injection, 3) low-rank coal with pre-drying vs. without pre-drying, and 4) dry coal feeding without steam injection vs. with steam injection at the second stage. The results show that 1) With predrying to 12% moisture, syngas produced from lignite has 538 K lower exit temperature and 18% greater Higher Heating Value (HHV) than syngas produced from Illinois #6. 2) The two-stage fuel feeding scheme results in a lower wall temperature (around 100 K) in the lower half of the gasifier than the single-stage injection scheme. 3) Without pre-drying, the high inherent moisture content in the lignite causes the syngas HHV to decrease by 27% and the mole fractions of both H2 and CO to decrease by 33%, while the water vapor content increases by 121% (by volume). The low-rank coal, without pre-drying, will take longer to finish the demoisturization and devolatilization processes, resulting in delayed combustion and gasification processes.

Analysis and Applications of the Measurement Uncertainty in Electrical Testing  [PDF]
Hung-Lu Wang
Journal of Power and Energy Engineering (JPEE) , 2015, DOI: 10.4236/jpee.2015.34040
Abstract:

Recently, uncertainty measurement is more and more recognizable in modern data management, conformity assessment, and laboratory accreditation system because of its importance. In this paper, a set of reasonable probability explanations are introduced and an effective method is pro- posed to quantify the assessment indices for the uncertainty measurement of electrical testing laboratory. First of all, the influence from uncertainty factors during the test process is taken into account. With the use of ISO/IEC Guide 98-3 standard and probability theory, the index and model for the measurement uncertainty assessment of a laboratory is then derived. From the simulation results of safety testing, laboratory uncertainty measurement assessment activity for actual electrical appliances, and the confirmation of Monte Carlo simulation method, the appropriateness and correctness of proposed method are verified.

Simulation of Ash Deposition Behavior in an Entrained Flow Coal Gasifier  [PDF]
Xijia Lu, Ting Wang
International Journal of Clean Coal and Energy (IJCCE) , 2015, DOI: 10.4236/ijcce.2015.42005
Abstract: Fly ash deposition is an important phenomenon associated with ash/slag handling and discharge in the entrained-flow coal gasification process. Fouling and slagging inside the gasifier may cause reliability and safety problems because they can impose strong negative effects on the gasifier wall in the way of heat transfer and chemical corrosion. For these reasons, this study focuses on investigating the ash deposition distribution inside of a two-stage entrained-flow gasifier. The computational model is developed in order to simulate the gasification process with a focus on modeling ash formation, fly ash, and ash deposition. The Eulerian-Lagrangian approach is applied to solve the reactive thermal-flow field and particle trajectories with heterogeneous reactions. The governing equations include the Navier-Stokes equations, twelve species transport equations, and ten global chemical reactions consisting of three heterogeneous reactions and seven homogeneous reactions. The coal/ash particles are tracked with the Lagrangian method. The effects of different coal/ash injection schemes and different coal types on ash deposition have been investigated. The results show that the two-stage fuel feeding scheme could distribute the ash throughout a larger gasifier’s volume and, hence, could reduce the peak ash deposition rate and make the ash distribution more uniform inside the gasifier. Gasification of a high-ash coal results in a high ash deposition rate, low syngas higher heating value (HHV), and low carbon conversion rate. The result of ash deposition rate in this study can be used as a boundary condition to provide ash particle influx distribution for use in slagging models.
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