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| 1 | Effects of anisotropy on time-depth relation in transversely isotropic medium with a vertical axis of symmetry显示文摘It is known that rock anisotropy can significantly influence the phase and energy velocities of an elastic wave,as well as its reflection/transmission(R/T)coefficients.As a result,it can distort the velocity analysis of seismic-reflection data.In this work we present a velocity analysis for seismic-reflection data based on the available anisotropic rock parameters.We analyzed the created errors on time-depth relation of the seismic-reflection data in neglecting rock anisotropy and/or neglecting the difference between energy velocity and phase velocity,including the case of wide-angle reflection.The calculated results show that the effect of rock anisotropy on time-depth relation of seismic-reflection data is dependent not only on the values of anisotropic parameters,but also on the space arrangement of both source and receiver-array.For all studied cases(weak,moderate or strong anisotropy),we found that the effect of rock anisotropy on time-depth relation could not be neglected.Nevertheless,for the case of weak anisotropy,the energy velocity may be replaceable by the phase velocity to obtain a very good approximation on time-depth relation.Consequently,the seismic-reflection data processing algorithm for numerical computations can be simplified. | FA Lin CASTAGNA John P ZENG ZhengWen BROWN Ray L ZHAO MeiShan | 2010 | Chinese Science Bulletin2010，55，21： | 9 |
| 2 | The influence of rock anisotropy on elliptical-polarization state of inhomogenously refracted P-wave显示文摘This paper discusses the influence of the anisotropy parameters on elliptical-polarization of the inhomogenously refracted P-wave induced at VTI-media interface.For this refracted P-wave,we have derived,the equations of the elliptical-polarization trajectory.Following the elliptical-polarization trajectory,we calculated the effects of the rock anisotropic-parameters on the polarization state,with a Poincare-sphere-like representation,for several varying media parameters.It is noted that the size,shape and initial phase angle of the elliptical-polarization trajectory are all depending the anisotropy media,as well as on the incident-angle.We expect that the findings from this paper would be applied to practical applications of seismic exploration. | Lin Fa Jie Zhao YongLan Han GuoHui Li PengFei Ding MeiShan Zhao | 2016 | Science China(Physics,Mechanics & Astronomy)2016，59，4： | 4 |
| 3 | Polarization of plane wave propagating inside elastic hexagonal system solids显示文摘Based on the reported physical parameters for hexagonal system solids,we have calculated the effects of anisotropy on polarization of plane P-wave propagation.Herein we report the results of calculations and the newly observed physical phenomena.It is found that,for a given propagation,if the polarization is parallel to the wave vector,so also to the Poynting vector.In such a case,the phase velocity is identical to the energy velocity;the quasi P-wave degenerates to a pure P-wave along the propagation.It is also noted that if the polarization is parallel to the Poynting vector but not to the wave vector,the propagating wave cannot be a pure P-wave.Furthermore,the polarization in a quasi P-wave may deviate from the wave vector for more than 45°,but the deviation from the Poynting vector is always less than 45°.The energy velocity of a quasi SV-wave can be larger than that of the quasi P-wave in some propagation directions,even though the phase velocity of a quasi SV-wave may never be larger than either the phase velocity or energy velocity of the quasi P-wave.Finally,in case of parameters ε=0 and δ*≠0,the polarization of a quasi P-wave has an observed symmetry at a 45°phase angle.The anisotropy of a hexagonal system solid determines if a pure P-wave can be created and what the propagation direction is for a plane wave propagating inside such a hexagonal system solid. | FA Lin ZHAO MeiShan LIU YongChang WANG Lei WANG YanQiang SUN JiGang | 2014 | Science China(Physics,Mechanics & Astronomy)2014，57，2： | 2 |
| 4 | Effects of electric-acoustic and acoustic-electric conversions of transducers on acoustic logging signal显示文摘Based on an acoustic logging transmission network and the engineering pattern of a sliding wave in acoustic logging, analysis and calculations have been performed in a study of the effects of the electric-acoustic and acoustic-electric conversions of the transducers on the acoustic logging signal. The results show that acoustic-electric conversion through the transducer can cause not only a serious disturbance in the signal amplitude, but also an apparent transmission delay. For engineering applications, the amplitude variation and transmission delay must be accounted for in a practical analysis of the acoustic logging signal in rocks. The results also show that with enhanced understanding and proper justification, the error caused by the acoustic-electric conversion can be significantly reduced in evaluation of the cement bond quality of a cased well, and the accuracy of rock porosity calculated using the measured acoustic velocity can be increased. | FA Lin XIE WenYan TIAN Yong ZHAO MeiShan MA Li DONG DaQun | 2012 | Chinese Science Bulletin2012，57，11： | 2 |
| 5 | An innovative model for the transient response of a spherical thin-shell transducer and an experimental confirmation显示文摘 | Lin Fa Xin Zhou YuXiao Fa YanDong Zhang JinPeng Mou Meng Liang MaoMao Wang Qi Zhang PengFei Ding WeiTing Feng Hong Yang MeiShan Zhao | 2018 | Science China(Physics,Mechanics & Astronomy)2018，61，11： | 1 |
| 6 | Acoustic Goos-H?nchen effect显示文摘We report two models of the lateral displacement of acoustic-wave scattering on a fluid-solid interface that reveal an acoustic analog of the Goos-H?nchen effect in optics. This acoustic analog is called the acoustic Goos-H?nchen effect. Using newly proposed models, we made numerical calculations for the system of a water-Perspex interface. Specifically, in the post-critical-angle region,we observed a lateral displacement(and transition time) of the reflected P-wave with respect to the incident P-wave. The first arrival of the acoustic signal from the interface is found to be a reflected P-wave rather than the sliding-refraction P-wave usually described in traditional acoustic-logging sliding P-wave theory. For both proposed models, the effective propagation speed of the reflected P-wave along the interface depends on not only the physical properties of the interfacial media but also the incident angle.These observations are intriguing and warrant further investigation. | Lin Fa Ling Xue YuXiao Fa YongLan Han YanDong Zhang HongShen Cheng PengFei Ding GuoHui Li ShaoJie Tang ChunLing Bai BingJie Xi XiaoLin Zhang MeiShan Zhao | 2017 | Science China(Physics,Mechanics & Astronomy)2017，60，10： | 1 |
| 7 | Effects of Geometrical-Size of Cylindrical-Shell Transducer on Acoustic-Beam Steering Efficiency for aSlim-Hole Acoustic-Logging Tool 显示文摘 | Lin Fa Zhengwen Zeng Chuanbao Deng and Meishan Zhao | 2010 | The Open A- coustics Journal2010，，3： | 1 |
| 8 | Identifying critical factors that affect the application of information technology in construction management: A case study of China显示文摘The new mode for managing construction projects with information technology(IT)has attracted worldwide attention because it can help managers and workers perform tasks and bring potential benefits,such as high-quality products and accident-free production,effectively.However,the application of IT in site have not achieved expected results because it is faced with many constraints caused by internal factors from enterprises and projects and external factors from the government and environment.Although many relevant studies have discussed the constraints of implementing different IT and devices in the construction industry or site,few articles have specifically focused on identifying and analyzing the indicator system.In this work,we took China as the background,scientifically identified 23 influential factors that affect the implementation of IT in construction management through literature review and expert interviews.Subsequently,questionnaires were issued,and Delphi method was used to obtain empirical data that aimed at four different management fields.Then,an efficient and convenient method called DEMATEL was used to deal with these data.Afterward,the factors were divided into four categories,namely,core,diving,independent,and impact factors.Finally,the similarities and differences of the analysis results from the four fields were compared,and the key factors were identified.Results show that the cross-domain talent ability,concept and value cognition,and organization structure are core factors in all management fields that should be managed first along with the IT innovation ability in the enterprise.The formulation of technical standards and related device and training input are also critical in specific fields.Strategic planning plays a role in macro control and promotion.Data management and application,platform construction,solution,and collaboration have direct impacts on information management.The research results provide suggestions not only for the government to formulate effective policies for IT application and promotion in construction industry,but also for enterprises to take measures in improving management efficiency in the construction site and realizing its substantial benefits. | Meishan JIA Youquan XU Pengwang HE Lingmin ZHAO | 2022 | Frontiers of Engineering Management2022，9，2： | 1 |
| 9 | Reflection and refraction of elastic wave at VTI-TTI media interface显示文摘We explore the physical phenomenon of acoustic waves induced at the interface between two different anisotropic rock media.Specifically,one medium is a transversely isotropic medium with a vertical axis of symmetry(VTI medium)and the other one is a transversely isotropic medium with a tilt axis of symmetry(TTI medium).By solving the Kelvin-Christoffel equation,an eighth-order polynomial is established for reflection and refraction angles,which is confirmed from SnelFs law.Three types of analytical expressions of the polarization coefficients of the induced waves are obtained corresponding to different incident angle regions.An effective algorithm has been developed for numerical analysis of the polarization coefficients.Applying characteristic anisotropic parameters reported in the literature,the influencing factors on reflection and refraction coefficients are analyzed,e.g.,the anisotropy,the tilt-angle of rock-layer,and the incident-angle.The calculated reflection and refraction coefficients have been rechecked for energy conservation. | Lin Fa Jiaojiao Tang Qi Zhang Minjin Zhang Yandong Zhang Meng Liang Meishan Zhao | 2020 | Frontiers of physics2020，15，2： | 0 |
| 10 | Effect of Spent Mushroom Substrate on Physical and Chemical Properties and Enzymic Activity of Rice显示文摘In order to explore the substitution substrate for rice seedling on upland fields,this paper uses spent mushroom substrate to study the physical and chemical properties of substrate,enzymic activity and number of tillers during the cultivation of rice seedling on upland fields.The results show that at the three stages of rice seedling cultivation( two-leaf stage,three-leaf stage,four-leaf stage),the content of organic matter and EC in spent mushroom substrate is higher than in the control soil,p H is within the range suitable for the growth of rice,and other nutrients( total nitrogen,total phosphorus,total potassium,available nitrogen,available phosphorus) are slightly different in different periods;except phosphatase,there are significant differences in urease,catalase and sucrase between spent mushroom substrate and the control soil; the number of tillers under spent mushroom substrate is larger than under the control. | Hairu YU Xue LI Xin ZHANG Changming GE Renzhe PIAO Meishan LI Zongjun CUI Hongyan ZHAO | 2016 | Asian Agricultural Research2016，8，6： | 0 |
| 11 | Variational Versus Nonvariational Calculations for H_(2)Br Molecular Scattering显示文摘We compare modern variational and nonvariational calculations of molecular scattering and present for H2Br system the selected numerically exact state-to-state reaction probabilities obtained from quantum variational scattering calculations,on the most accurate available potential energy surface. | ZHAO Meishan | 1994 | Chinese Physics Letters1994，11，1： | 0 |
| 12 | Cumulative Reaction Probabilities of Cl+H_(2) from Quantum Scattering Calculations and Evaluation of Thermal Rate Constant显示文摘We report the cumulative reaction probabilities(CRP)of the three-dimensional Cl+H_(2)→H+HCl calculated on the Stern-Persky-Klein potential energy surface,using the generalized Newton variational principle,for total angular momentum J=0,over a total reaction energy range from 9 to 19 kcal/mol.The relation between CRP and reaction rate constants,as well as the calculation for complete reaction rates(summed over all J),bypassing the direct calculation of the CRP's for J>0,are also discussed. | ZHAO Meishan | 1994 | Chinese Physics Letters1994，11，12： | 0 |
| 13 | APPCorp:a corpus for Android privacy policy document structure analysis显示文摘With the increasing popularity of mobile devices and the wide adoption of mobile Apps,an increasing concern of privacy issues is raised.Privacy policy is identified as a proper medium to indicate the legal terms,such as the general data protection regulation(GDPR),and to bind legal agreement between service providers and users.However,privacy policies are usually long and vague for end users to read and understand.It is thus important to be able to automatically analyze the document structures of privacy policies to assist user understanding.In this work we create a manually labelled corpus containing 231 privacy policies(of more than 566,000 words and 7,748 annotated paragraphs).We benchmark our data corpus with 3 document classification models and achieve more than 82%on F1-score. | Shuang LIU Fan ZHANG Baiyang ZHAO Renjie GUO Tao CHEN Meishan ZHANG | 2023 | Frontiers of Computer Science2023，17，3： | 0 |
| 14 | An analysis of the rate of isomerization in molecules with an asymmetric double well potential显示文摘The classical theory of the rate of unimolecular isomerization developed by Gray andRice as extended by Zhao and Rice is applied to the calculation of the rate of isomerization in modelsystems which have linear asymmetric double well potentials. We are interested in this system fortwo reasons. First, we are interested in the detailed dynamical processes for the mentioned systembecause it is widely related to practical chemical reactions. Second, the present model systemhas an asymmetric double well potential, which provides a different test of the accuracy of theapproximations used in the Gray-Zhao-Rice theory than posed by previous applications. We havecalculated relaxation rates and relaxation times for the model systems on different time scales.We find that for the systems under studies the Gray-Zhao-Rice version of the classical theory ofisomerization rate yields values in good agreement with those generated from trajectory calculationsand from the Reactive Island theory of De Leon et al. | Meishan Zhao*, Department of Chemistry and The James Franck Institute, The University of Chicago, Chicago, Illinois 60637, U.S.A. Department of Physics and Chemistry, Southeast University, Nanjing. | 1993 | Chinese Journal of Chemistry1993，11，6： | 0 |
| 15 | Quantum mechanical reaction dynamics in collisions of chlorine atom with hydrogen molecule显示文摘We report the accurate determinations of quantum mechanical state-to-state probabilities tor reactions Cl + H2 - HCl + H and H’ + HCl - H’Cl + H by the generalized Newton variational principle, on the most accurate available potential energy surface. We compare the results for three versions of realistic potential energy surfaces, and to those from hyperspherical close-coupling calculations. | Meishan ZHAO The James Franck Institute, the University of Chicago, Chicago, Illinois 60637, U.S.A. | 1994 | Chinese Journal of Chemistry1994，12，3： | 0 |
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