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The Newly Discovered Yanchang Gas Field in the Ordos Basin, Central China

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Journal of Earth Science 2017年第2期28卷 347-357页

作者： Hairen Gao weili wang Oil and Gas Exploration Company Yanchang Petroleum (Group) Co. LTD

The Yanchang gas field is located in the Ordos Basin of central China to the southeast of the Yishan Slope, covers an exploration area of 2.6× 10~4 km^2 and has approximately 3.5× 10^（11） m^3 of gas reserves. The gas field is dominated by lithologic gas reservoirs but also has a few structural gas reservoirs. Sand bodies were deposited in the Carboniferous Benxi Formation around offshore barrier islands and in distributary channel fillings in the delta front of the P_1s_2 and P_1s_1 divisions of the Permian Shanxi Formation. The P_2h_8 division of the Shihezi Formation contains the main reservoirs. The depths of the reservoirs are between 1 970 and 3 500 m. The Yanchang gas field can be classified as a typical tight sandstone gas reservoir filed because its porosity is lower than 10% and permeability lower than 1 mD. The discovery and development of the Yanchang gas field has led to a great increase in total natural gas reserves in the Ordos Basin. Its exploration has improved methods of locating large gas fields in deep-water depositional environments in the south part of the basin.

关键词： Yanchang gas field Ordos Basin Central China tight gas reservoir lithologic reservoir gas in coal-bearing strata

Formation mechanism of primary phases and eutectic structures within undercooled Pb-Sb-Sn ternary alloys

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Science China(Physics,Mechanics & Astronomy) 2007年第4期50卷 472-490页

作者： wang weili DAI FuPing WEI BingBo Department of Applied Physics Northwestern Polytechnical UniversityXi’an 710072China

The solidification characteristics of three types of Pb-Sb-Sn ternary alloys with different primary phases were studied under substantial undercooling conditions. The experimental results show that primary (Pb) and SbSn phases grow in the dendritic mode, whereas primary (Sb) phase exhibits faceted growth in the form of polygonal blocks and long strips. (Pb) solid solution phase displays strong affinity with SbSn intermetallic compound so that they produce various morphologies of pseudobinary eutectics, but it can only grow in the divorced eutectic mode together with (Sb) phase. Although (Sb) solid solution phase and SbSn intermetallic com- pound may grow cooperatively within ternary eutectic microstructures, they sel- dom form pseudobinary eutectics independently. The (Pb)+(Sb)+SbSn ternary eutectic structure usually shows lamellar morphology, but appears as anomalous eutectic when its volume fraction becomes small. EDS analyses reveal that all of the three primary (Pb), (Sb) and SbSn phases exhibit conspicuous solute trapping effect during rapid solidification, which results in the remarkable extension of sol- ute solubility.

关键词： undercooling dendritic growth eutectic growth ternary eutectic solute trapping

Damage effectiveness assessment method for anti-ship missiles based on double hierarchy linguistic term sets and evidence theory

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Journal of Systems Engineering and Electronics 2022年第2期33卷 393-405页

作者： YAO Tianle wang weili MIAO Run DONG Jun YAN Xuefei Ordnance Engineering College Naval University of EngineeringWuhan 430000China Xi’an Modern Chemistry Research Institute Xi’an 710065 Institute of Systems Engineering Academy of Military ScienceBeijing 100082

The research on the damage effectiveness assessment of anti-ship missiles involves system science and weapon science, and has essential strategic research significance. With comprehensive analysis of the specific process of the damage assessment process of anti-missile against ships, a synthetic damage effectiveness assessment process is proposed based on the double hierarchy linguistic term set and the evidence theory. In order to improve the accuracy of the expert ’s assessment information, double hierarchy linguistic terms are used to describe the assessment opinions of experts. In order to avoid the loss of experts ’ original information caused by information fusion rules, the evidence theory is used to fuse the assessment information of various experts on each case. Good stability of the assessment process can be reflected through sensitivity analysis, and the fluctuation of a certain parameter does not have an excessive influence on the assessment results. The assessment process is accurate enough to be reflected through comparative analysis and it has a good advantage in damage effectiveness assessment.

关键词： anti-ship missile damage effect assessment linguistic term set evidence reasoning

Identity and Differences Between Chinese and Western Cultural Philosophy

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学术界 2018年第11期 262-272页

作者： Chen Jiafu wang weili College English Teaching and Research Department Tianjin Agricultural University

Cultural philosophy refers to the study of cultural principles with philosophical viewpoints and methods to form a theoretical system of cultural views and cultural *** mainly discusses the history and development of culture,the motive force and conditions of culture,the role of tradition in social history,the comparison of various cultures,and the conflict and blending of *** paper attempts to explore an effective way to integrate the two modes of thinking of Chinese and Western cultural philosophy through a comparative analysis of the differences and identity between Chinese and Western cultural *** study of cultural identity and differences between China and Western countries has a certain practical significance for cross-cultural communication in China.

关键词： cultural philosophy differences identity

Light-responsive organic artificial enzymes:Material designs and bio-applications

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Nano Research 2023年第1期16卷 117-126页

作者： weili wang Qing Shen Hao Cai Leichen wang Jinjun Shao Wenjun wang Xiaochen Dong Key Laboratory of Flexible Electronics(KLOFE)and Institute of Advanced Materials(IAM) Nanjing Tech University(NanjingTech)Nanjing 211816China School of Physical Science and Information Technology Liaocheng UniversityLiaocheng 252059China

As significant biocatalysts,natural enzymes have exhibited a vast range of applications in biocatalytic ***,the“always-on”natural enzyme activity is not beneficial for the regulation of catalytic processes,which limits their ***,it has been extensively reported that various organic artificial enzymes exhibit prominent absorption and controlled activity under illumination,which not only creates a series of light-responsive catalytic platforms but also plays a key role in biosensing and biomedical *** provide novel ideas for the design of artificial enzymes,we conduct this review to highlight the recent progress of light-responsive organic artificial enzymes(LOA-Enz).The specific photoresponse mechanism and various bio-applications of LOA-Enz are also presented in ***,the remaining challenges and future perspectives in this field are discussed.

关键词： light-response organic artificial enzymes catalytic activity bio-applications

Rapid solidification and dendrite growth of ternary Fe-Sn-Ge and Cu-Pb-Ge monotectic alloys

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Science China(Physics,Mechanics & Astronomy) 2007年第4期50卷 491-499页

作者： ZHANG XueHua RUAN Ying wang weili WEI BingBo Department of Applied Physics Northwestern Polytechnical UniversityXi’an 710072China

The phase separation and dendrite growth characteristics of ternary Fe-43.9%Sn- 10%Ge and Cu-35.5%Pb-5%Ge monotectic alloys were studied systematically by the glass fluxing method under substantial undercooling conditions. The maximum undercoolings obtained in this work are 245 and 257 K, respectively, for these two alloys. All of the solidified samples exhibit serious macrosegregation, indicating that the homogenous alloy melt is separated into two liquid phases prior to rapid solidification. The solidification structures consist of four phases including α-Fe, (Sn), FeSn and FeSn2 in Fe-43.9%Sn-10%Ge ternary alloy, whereas only (Cu) and (Pb) solid solution phases in Cu-35.5%Pb-5%Ge alloy under different undercool- ings. In the process of rapid monotectic solidification, α-Fe and (Cu) phases grow in a dendritic mode, and the transition "dendrite→monotectic cell" happens when alloy undercoolings become sufficiently large. The dendrite growth velocities of α-Fe and (Cu) phases are found to increase with undercooling according to an exponential relation.

关键词： phase separation dendrite growth monotectic alloy undercooling macrosegregation

Solute redistribution profiles during rapid solidification of undercooled ternary Co-Cu-Pb alloy

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Science China(Physics,Mechanics & Astronomy) 2014年第3期57卷 393-399页

作者： YAN Na wang weili XIA ZhenChao WEI BingBo Key Laboratory of Applied Physics and Chemistry Ministry of EducationNorthwestern Polytechnical University

The solute redistribution and phase separation of liquid ternary Co-35%Cu-32.5%Pb immiscible alloy have been investigated using glass fluxing method.A bulk undercooling of 125 K was achieved and the macrosegregation pattern was characterized by a top Co-rich zone and a bottom Cu-rich *** average solute contents of the two separated zones decreased with the increase of undercooling,except for the solute Pb in Cu-rich *** the enhancement of undercooling,a morphological transition from dendrites into equaxied grains occurred to the primary(Co)phase in Co-rich *** solute redistribution of Cu in primary(Co)phase was found to depend upon both the undercooling and composition of Co-rich *** migration is shown to be the main dynamic mechanism of droplet movement during liquid phase separation.

关键词： solute redistribution phase separation macrosegregation undercooling rapid solidification

Dual solidification mechanisms of liquid ternary Fe-Cu-Sn alloy

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Science China(Physics,Mechanics & Astronomy) 2012年第3期55卷 450-459页

作者： weili wang XiaoMei Zhang LiuHui Li BingBo Wei Northwestern Polytech Univ Dept Appl Phys Xian 710072 Peoples R China

Liquid ternary Fe47.5Cu47.5Sn5 alloy displayed dual solidification mechanisms when it was undercooled by up to 329 K （0.19TL）. Below a critical undercooling of about 196 K, it solidified just like a normal peritectic alloy, even though metastable phase separation occurred to a microscopic extent. Once bulk undercooling exceeds 196 K, macroscopic segregation played a domi- nant role in solidification. In both cases, the solidification process was always characterized by two successive peritectic trans- formations： firstly primary yFe dendrites reacted with liquid phase to form （Cu） phase, and subsequently the （Cu） phase reacted with residual liquid phase to yield β-Cu5.6Sn intermetallic compound. The primary yFe dendrites achieved a maximum growth velocity of 400 mm/s and experienced a growth kinetics transition as a result of macrosegregation. Since the （Cu） phase was both the product phase of the first peritectic transformation and also the reactant phase for the second peritectic transformation, it appeared as two layers in solidification microstructures due to the microsegregation of Sn solute. The boundary continuity between the macroscopically separated Fe-rich and Cu-ricb zones was enhanced with the increase of undercooling.

关键词： peritectic solidification phase separation macrosegregation undercooling dendritic growth

Dendrite growth characteristics within liquid Fe-Sb alloy

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Science China(Physics,Mechanics & Astronomy) 2009年第5期52卷 720-728页

作者： wang weili LüYongJun QIN HaiYan WEI BingBo Department of Applied Physics Northwestern Polytechnical UniversityXi’an 710072China

Bulk samples and small droplets of liquid Fe-10%Sb alloys are undercooled up to 429 K (0.24TL) and 568 K (0.32TL), respectively, with glass fluxing and free fall techniques. The high undercooling does not change the phase constitution, and only the αFe solid solution is found in the rapidly solidified alloy. The experimental results show that when the undercooling is below 296 K, the growth velocity of αFe dendrite rises exponentially with the increase of undercooling and reaches a maximum value 1.38 m/s. Subsequently, the growth velocity begins to decrease if undercooling further increases. The αFe phase grows into coarse dendrites under small undercooling conditions, whereas it becomes vermicular dendrites in highly undercooled melts. The solute trapping is closely related to the dendrite growth velocity and cooling rate rather than undercooling. Although the solute trapping can be remarkably suppressed by the rapid dendrite growth, the segregationless solidification is not observed in the present experiments due to the large solidification temperature range.

关键词： liquid physics dendrite growth solute distribution segregationless solidification