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Simultaneous inversion of permeability,skin and boundary from pressure transient test data in three-dimensional single well reservoir model

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Petroleum Research 2024年第2期9卷 265-272页

作者： Arvind Kumar lin liang Keka Ojha Schlumberger India Indian Institute of Technology(ISM) DhanbadIndia

This study presents a novel approach for simultaneous inversion of the key reservoir parameters like horizontal permeability,vertical permeability,skin,and boundary distances for spatial distribution across the grid cells in a 3D single well reservoir model(SWRM).These parameters are first estimated from the standard pressure transient analysis of well test pressure and rate data,which also act as a priori for the inverse problem.A field-worthy layer cake geological model is prepared based on the prior information obtained from pressure transient analysis,followed by a sequential flow simulation of field well test *** simulation results provide the model pressure versus rate data as the synthetic data for this study.A cost function is defined incorporating the well test pressure data and model pressure data,which would determine the *** inversion process is to optimize the spatial distribution of reservoir parameters to minimize the difference between the measured pressure transient data and the modelled one,which is obtained from the multiphase fluid flow simulator that solves the implicit black-oil fluid-flow diffusivity equations at every step.A Gauss-Newton(GN)inversion scheme is used for the *** reliability of inversion results depends on the accuracy of priori reservoir parameters fed to the solver,which can be refined if required through uncertainty parameter optimization(UPO).This approach helps to obtain a faster and reliable update of reservoir parameters in a layer cake homogeneous geomodel,hereby introducing the required *** increases the confidence and reliability of a geomodel,which is further used for various production prediction strategies.

关键词： Well test Pressure transient Inversion Permeability Boundary

Shot Noise in Aharonov-Casher Rings

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Chinese Physics Letters 2010年第6期27卷 199-202页

作者： lin liang-Zhong ZHU Rui DENG Wen-Ji Department of Physics South China University of Technology Guangzhou 510640

We investigate the shot noise of electron transport through an Aharonov-Casher ring subject to the Rashba spin-orbit coupling （SOC）. Analytic expressions for the coefficients of reflection and transmission are derived by using the Griffith boundary conditions. For this kind of SOC, the ballistic transport of electrons can be analyzed as two independent spin channels, and both of them have the same transmission and reflection coefficients. The dependences of shot noise and Landauer-Biittiker conductance on controllable factors, including the strength of Rashba SOC, the asymmetrical angle of lead-connection positions, the radius of the rings, and the wave vector （or energy） of the incident Fermi electrons, are explicitly described by some new combined parameters. The ways that the shot noise and conductance vary with Rashba SOC and with asymmetrical angle are demonstrated by numerical simulations, respectively. It is revealed that the shot noise reaches its maximum for the particular situation of half transmission and half reflection and zero shot noise occurs at conductance maxima.

关键词： Noise Reflectance Girdling Spinning Transmissions Electronics Transport Angling

Directional Photo-manipulation of Self-assembly Patterned Microstructures

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Chinese Journal of Polymer Science 2018年第3期36卷 297-305页

作者： Wei Wang Fei Gao Yuan Yao Shao-liang lin Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of EducationSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China

Highly intricate surface architectures derived from patterned polymer microstructures have received increasing concern in recent *** photo-manipulation(DPM)of azopolymers is one of the effective strategies to tune the patterned polymer microstructures through directional mass migration(DMM)upon polarized light *** this feature article,we emphasize the latest advances of DPM on azopatterns created by *** mechanism of DMM,the photo-manipulation performance,and functions of manipulated patterns are introduced in *** presented,DPM can manipulate the as-prepared microstructures feasibly by taking the advantages of non-contacting and nondestructive ***,the challenges and opportunities of DPM strategy are discussed in conclusion.

关键词： Self-assembly Directional photo-manipulation Surface patterning Azopolymer

Plug-in Gate-loop Compensators for Series-connected IGBT Drivers in a Solid-state Fault Current Limiter

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CSEE Journal of Power and Energy Systems 2022年第1期8卷 165-174页

作者： Rui Wang Yu Chen Jing Chen lin liang Li Peng School of Electrical and Electronic Engineering Huazhong University of Science and TechnologyWuhan 430074China

A solid-state fault current limiter(SSFCL)is the key protective equipment in a direct current distribution *** order to meet the high voltage requirements and reduce costs,implementing a SSFCL based on series-connected insulated gate bipolar transistors(IGBTs)is a promising ***,voltage unbalancing of IGBTs would be introduced if the gateloops of the IGBTs are *** this paper,a plug-in gate-loop compensator with discrete gate voltage feedback and pulsewidth current compensation is *** main merits are:1)with the plug-in structure,the extra current sources only provide small power to fine-tune the gate-loop without affecting the functions provided by the commercial IGBT gate driver;2)the gate-emitter voltages of IGBTs are compared with the preset thresholds to obtain control criterion,and the pulsewidths of the current sources are controlled for gate-loop compensation,thus both analog-digital and digital-analog converters are avoided;3)the control law is easy to implement in FPGA,and is robust to voltage variation of *** the proposed compensator,the voltage unbalancing is alleviated immediately at the present switching cycle,and further eliminated cycle-by-cycle during the current limitation *** results verify the feasibility of the proposed compensator.

关键词： Current limitation direct current distribution network insulated gate bipolar transistors(IGBTs) voltage balancing

Programmable Quantum Processor with Quantum Dot Qubits

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Chinese Physics Letters 2019年第7期36卷 10-13页

作者： Yao Chen Fo-liang lin Xi liang Nian-Quan Jiang College of Mathematics Physics and Electronic Information Engineering Wenzhou University

The realization of controllable couplings between any two qubits and among any multiple qubits is the critical problem in building a programmable quantum processor(PQP). We present a design to implement these types of couplings in a double-dot molecule system, where all the qubits are connected directly with capacitors and the couplings between them are controlled via the voltage on the double-dot molecules. A general interaction Hamiltonian of n qubits is presented, from which we can derive the Hamiltonians for performing operations needed in building a PQP, such as gate operations between arbitrary two qubits and parallel coupling operations for multigroup qubits. The scheme is realizable with current technology.

关键词： The realization of controllable among any multiple with current technology

MIDDLE EAR MECHANISMS IN PROTECTION AGAINST NOISE INDUCED COCHLEAR DAMAGE

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Chinese Journal of Acoustics 1989年第2期8卷 178-184页

作者： He, Zhizhou lin, Huaying lin, Xi liang, Zhi'an Shanghai Inst of Physiology Shanghai China

Quantitative estimation of sound transmission attenuation by different middle-ear protecting mechanisms was made with the use of a computer-based CM-cogram analyzing method (FFT of cochlear output in response to white noise) and other audiometric means. Strong reflex contraction of the middle-ear muscles in guinea pigs may cause a 5- 20 dB transmission attenuation in different frequency ranges. For impulse noise exposure, the presence of an effective reflex at the lashing of every impulse may reduce the post - exposure hearing threshold shift in 15 dB on an *** tension of the tympanic membrane by applying pressure to the ear- canal is also *** for frequencies below 500 Hz where attenuation of more than 10dB may result at a pressure difference of about 200mm H2O between the two sides of the membrane. Simulated opening of the eustachian tube helps only very insignificantly, with attenuation less than 5 dB. Destruction of the middle-ear structures ( drum perforation, ossicular disruption etc .) and fluid accumulation inside the tympanic cavity may buffer acoustic trauma to the cochlea to different extent depending on the amount of transmission attenuation.

关键词： Acoustic Variables Measurement Intensity Acoustic Wave Effects Acoustic Waves Attenuation Computers Applications Mathematical Transformations Fast Fourier Transforms

Study of Pressure Balance for Press-Pack IGBTs and Its Influence on Temperature Distribution

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Chinese Journal of Electrical Engineering 2018年第4期4卷 57-63页

作者： Zihao Zhao lin liang Lubin Han State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China

Pressure balance is a key technology for Press-Pack IGBT packaging,and is studied in this paper with its influence on the temperature distribution discussed in further when the device is turned *** establishing the physical model of the Press-Pack IGBT device in the finite element simulation software,the influence of the internal flatness condition on the pressure balance is analyzed,and the variation of the average pressure difference with the flatness in different parallel scale of the chips is *** thermal contact resistance and the electrical contact resistance parameters,which are dependent on the pressure,are then imported to perform the multi-field coupling,further investigating the effect of different pressure distributions on temperature *** junction-case thermal resistance of the device with different flatness is compared *** results have demonstrated the influence of the flatness on the thermal resistance of the Press-Pack IGBT device.

关键词： Press-Pack IGBT pressure balance temperature distribution thermal resistance

Surfaces with Isotropic Blaschke Tensor in S^3

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Acta Mathematica Sinica,English Series 2015年第5期31卷 863-878页

作者： Feng Jiang LI Jian Bo FANG lin liang Department of Mathematics Yunnan Normal University Department of Mathematics and statistics Chuxiong Normal University

Abstract Let M^2 be an umbilic-free surface in the unit sphere S^3. Four basic invariants of M^2 under the Moebius transformation group of S^3 are Moebius metric g, Blaschke tensor A, Moebius second fundamental form B and Moebius form φ. We call the Blaschke tensor is isotropic if there exists a smooth function λ such that A = λg. In this paper, We classify all surfaces with isotropic Blaschke tensor in S^3.

关键词： Moebius geometry Blaschke tensor isotropic

An Iconic Mapping of linguistics Into Literary Criticism On the linguistic Roots of Structuralist Literary Criticism

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Language and Semiotic Studies 2018年第1期4卷 32-39页

作者： liang-lin Zhang Changshu Institute of Technology China

Peirce's concept of icon sheds light on the iconic mapping relationship between structural linguistics and structuralist literary criticism, and the failure of the *** a revolt against the traditional extrinsic approaches to literature, structuralist literary criticism flourished as an important literary movement in the 1950 s and 1960 ***, its difficulties cannot be *** failure of structuralist literary criticism can be found deeply rooted in structural *** by the spirit of iconic mapping and semiotic interdisciplinarity, the present paper makes an interdisciplinary investigation into the linguistic roots of structuralist literary *** of all, it examines the concept of "a closed system," initially established by Ferdinand de Saussure in his Course in General linguistics, which occupies a predominant position in sructuralist ***, it looks at how structuralist literary criticism borrows the principle of digging various levels of structures from structural linguistics; and thirdly, how the typical notion of relations in structural linguistics is also widely used in structuralist literary *** probing into the linguistic roots of structuralist criticism, this paper aims to clarify the cause of the failure of structuralist criticism.

关键词： iconic mapping structuralist literary criticism structural linguistics difficulties