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Pore structure characteristics of low-rank coal reservoirs with different ash yields and their implications for recoverability of coalbed methane—a case study from the Erlian Basin, northeastern China

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Frontiers of Earth Science 2023年第1期17卷 18-29页

作者： Dawei DONG Jiaosheng YANG Qiujia HU Shitao CUI Fenjin SUN jidong zhang Xinrui CUI Shandong Institute of Petroleum and Chemical Technology Dongying 257061China PetroChina Research institute of petroleum exploration and development Beijing 100083China Shanxi CBM Exploration and Development Branch PetroChina Huabei Oilfield CompanyChangzhi 046000China China National Logging Corporation Xi’an 710077China

Pores are the main accumulation sites and migration pathways for coalbed methane(also referred to as CBM).Pore structure restricts the content and recoverability of CBM from coal reservoirs.In this study,12 representative coal samples with different ash yields that have similar tectonic characteristics and burial depths were collected from different mining areas in the Jiergalangtu and Huolinhe depressions in the Erlian Basin.These samples were used to study the restrictions of ash yield on the characteristics of coal pore structures and the recoverability of CBM through macroscopic and microscopic structure observation,scanning electron microscope observations,vitrinite reflectance tests,low-temperature N2 adsorption,nuclear magnetic resonance(NMR),and micro-computed tomography.The results show that coal reservoirs in the study area vary greatly in ash yield,based on which they can be divided into three types,i.e.,low-ash-content,ash-bearing,and high-ash-content coal reservoirs.In addition,the ash yield has a certain impact on the development of coal pores;coal samples with lower ash yields indicate the presence of well-developed medium-large pores and better connectivity.Ash yield also has a certain impact on the brittleness of coal wherein a lower ash yield implies the development of brittle coal that is more liable to fracture as compared to less brittle samples at the same pressure.Absorbed gas content also varies significantly with ash yield;a low ash yield impacts the gas saturation of coal.Overall,for coal reservoirs in the study area,their porosity,pore diameter,movable fluid porosity,adsorbed gas amount,and recoverability decrease as the ash yield increases.

关键词： coal reservoir ash pore structure recoverability Erlian Basin

基于聚集诱导效应(AIE)-激发态分子内质子转移(ESIPT)效应的四苯乙烯荧光探针对Zn(Ⅱ)检测研究

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有机化学 2024年第4期44卷 1337-1342页

作者：张继东杨垚张杰厍伟安康学院化学化工学院陕西省富硒食品质量监督检验中心陕西安康725000 中国富硒产业研究院农业农村部富硒产品开发与质量控制重点实验室陕西安康725000

设计合成了一种以四苯乙烯为荧光基团、邻香草醛为识别基团的聚集诱导效应(AIE)Zn^(2+)荧光探针.探针的结构通过^(1)H NMR、质谱及X射线单晶衍射进行了表征.荧光光谱研究发现,探针对Zn^(2+)表现出良好的选择性和灵敏性,荧光强度随着Zn^(... 详细信息

设计合成了一种以四苯乙烯为荧光基团、邻香草醛为识别基团的聚集诱导效应(AIE)Zn^(2+)荧光探针.探针的结构通过^(1)H NMR、质谱及X射线单晶衍射进行了表征.荧光光谱研究发现,探针对Zn^(2+)表现出良好的选择性和灵敏性,荧光强度随着Zn^(2+)的浓度增大而逐渐增强.通过Job plot和单晶结构表征发现,探针与Zn^(2+)是2∶1的结合模式,检测限为56.2 nmol·L^(-1).检测机理归因于激发态分子内质子转移(ESIPT)和AIE效应.该新型AIE探针可作为分析测定Zn^(2+)的一种便捷工具.

关键词：四苯乙烯聚集诱导发光荧光探针锌配合物

A Simplified Formulation to Estimate Influence of Gearbox Parameters on the Rattle Noise

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Sound & Vibration 2019年第2期53卷 38-49页

作者： jidong zhang Wentao Sui Jaspreet Dhupia School of Mechanical and Aerospace Engineering Nanyang Technological UniversitySingapore639798Singapore School of Mechanical Engineering Shandong University of TechnologyZibo255000China Department of Mechanical Engineering University of AucklandAuckland1010New Zealand

Occurrence of gear rattle in transmission systems can result in severe vibration and noise,which in applications such as automobiles is an important source of user discomfort.As a result,the reduction of the rattling noise has attracted lot of concerns.The rattling noise level is affected by several gearbox parameters,an understanding of which is essential to prevent the expensive design modifications at later stages of product development.To develop such understanding at the gearbox design stage,this paper analytically evaluates the gear parameters’effect on the root mean square of the wheel gear acceleration under idling condition,which is known to be linearly correlated to the rattling noise level.Therefore,this evaluation allows for an investigation of the gear parameters’influence on the rattling noise as well.This method is then verified by comparing the analytical results with the simulation results from a dynamic model built in SIMPACK as well as previously published experimental results.Thus,the proposed analytical evaluation method can optimize the gearbox specifications at the design stage to reduce the gear rattle noise level.

关键词： Rattle noise gear parameter analytical evaluation backlash dynamic model

识解视域下转喻式翻译的“在场”研究——以《印度:受伤的文明》汉译为例

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外语研究 2024年第2期41卷 80-87页

作者：张继东杜若凡上海外国语大学英语学院上海201620

“在场”是西方修辞学中的一个核心概念,在翻译研究中修辞“在场”的创设与识解维度和转喻密切相关。基于认知识解理论和转喻的运作机制,本研究考察了译者是如何利用修辞“在场”再现原文并影响受众的。研究发现,由于译者受详略度、聚... 详细信息

“在场”是西方修辞学中的一个核心概念,在翻译研究中修辞“在场”的创设与识解维度和转喻密切相关。基于认知识解理论和转喻的运作机制,本研究考察了译者是如何利用修辞“在场”再现原文并影响受众的。研究发现,由于译者受详略度、聚焦、突显性、视角等识解维度的影响,产出的译文在语言表达形式上与原文存有差异,但经由转喻操作后,与原文形成了较高的语义对等。因此在识解维度的作用下,译者通过转喻式翻译基本实现了原文信息的“在场”效果。本研究能够深化翻译中对修辞“在场”的探索,对翻译学与修辞学的系统优化构建有一定的促进作用。

关键词： “在场” 转喻式翻译识解

文学翻译中情感词的对比研究——以Who Do You Think You Are?及其汉译为例

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外国语 2024年第2期47卷 117-128页

作者：张继东杜若凡上海外国语大学英语学院上海201620

本研究基于门罗小说Who Do You Think You Are?英汉平行语料库,借助文本情感分析技术,对比考察了原文本、廖绣玉译本和邓若虚译本中的情感词及其所呈现的文体特征。研究发现,在情感词密度、情感词强度及情感流模式上,三个文本间存有不... 详细信息

本研究基于门罗小说Who Do You Think You Are?英汉平行语料库,借助文本情感分析技术,对比考察了原文本、廖绣玉译本和邓若虚译本中的情感词及其所呈现的文体特征。研究发现,在情感词密度、情感词强度及情感流模式上,三个文本间存有不同程度的差异:两译本的情感词密度高于原文本,但情感词强度低于原文本,尤其是消极情感词,主要是由于两译本采取了增译、弱化、漏译、多词合并及词性转化等翻译方法;两译本之间的差异集中体现在消极情感词上,主要是因为二者倾向于使用不同词类或不同强度的情感词进行翻译;三文本在消极情感流模式上具有显著差异。三个文本情感词上的差异与中西文化认同、两译者地域背景及两译本翻译策略等因素密切相关。本研究从情感词分析的角度拓展了译本风格研究的维度。

关键词：文本情感分析情感词密度情感词强度情感流模式《你以为你是谁?》

A High Selective Chemiluminescent Probe Derived from Iso-luminol Enabling High Sensitive Determination of Ferrous Ions in the Environmental Waters

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Chinese Journal of Chemistry 2021年第11期39卷 2967-2972页

作者： Shenghai zhang Yalin Shi Jiawang Deng jidong zhang Mengqi Cheng Geting Yu Quality Supervision and Inspection Centre of Se-enriched Food of Shaanxi Province School of Chemistry&Chemical EngineeringAnkangUniverisityAn'kangShaanxi725000 China Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province School of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi'anShaanxi710119 China

A new chemiluminescence(CL)reagent named 4-amino-5-thiocyanato-phthalyl-hydrazine(iso-luminol-SCN)is synthesized by the bromide-mediated substitution reaction of iso-luminol with sodium thiocyanate in dimethyl formamide(DMF)at room temperature.Strong CL is observed for iso-luminol-SCN oxidized by hydrogen peroxide(H2O2)in the presence of Fe^(2+),with the CL intensity strongly depending on the concentration of Fe^(2+)and being hardly interferred by other common metal ions.Based on this fact,a flow injection CL method is established for the high sensitive and selective determination of Fe^(2+).The CL intensity was linearly correlated with the concentration of Fe^(2+)in the range of 1.0×10^(–8) mol·L^(-1) to 1.0×10^(–5) mol·L^(-1) following the equation CLnet=166.3c+57.7(c,×10^(–6) mol·L^(-1);n=7;R2=0.9988).The detection limit is calculated to be 3.2×10–9 mol·L^(-1) Fe^(2+)based on the 3S0/K principle.The relative standard deviation(RSD)was 3.7%for 1.0×10^(–6) mol·L^(-1) Fe^(2+)(n=11),a support for the precision of Fe^(2+)measurement.The recoveries of Fe^(2+)were obtained in the range of 98.8%—101.6%in three real water samples,showing the applicability and reliability by the proposed method.The possible CL mechanism is proposed based on the kinetic characteristic of the CL reaction and the CL spectrum.

关键词： Chemiluminescence probe Synthesis design Ferrous ions Analytical method Environmental waters

事件层组合特征限定软沉积变形的地震成因——在青岛灵山岛的应用

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地球科学进展 2024年第1期39卷 96-107页

作者：张济东梁超操应长陈奥卢银中国石油大学(华东)地球科学与技术学院山东青岛266580 中国石油大学(华东)深层油气全国重点实验室山东青岛266580 同济大学海洋地质国家重点实验室上海200092

对软沉积物变形构造的形成过程解析和触发因素识别一直是国内外事件沉积学研究的重点和难点。国内外学者常将地层中保存的软沉积物变形构造的形成归因于地震作用,但缺乏足够的证据来支撑地震震动触发相应的沉积过程与变形机制。由于软... 详细信息

对软沉积物变形构造的形成过程解析和触发因素识别一直是国内外事件沉积学研究的重点和难点。国内外学者常将地层中保存的软沉积物变形构造的形成归因于地震作用,但缺乏足够的证据来支撑地震震动触发相应的沉积过程与变形机制。由于软沉积物变形构造可以由地震、风暴和非地震参与的液化作用、重力作用及滑坡等因素触发,且可能受瑞利—泰勒不稳定性(因密度差异沿垂向变形)或开尔文—亥姆获兹不稳定性(沿水平方向变形)机制的控制,软沉积物变形构造本身并不能作为特定触发因素的判别标志。此前,通过解析事件层组合特征来揭示与软沉积物变形构造形成相关的沉积过程和变形机制,进而限定变形构造触发因素的方法已成功应用于中东地区死海盆地(死海断裂带)的事件沉积研究中。尝试应用此方法来解析灵山岛灯塔剖面底部软沉积物变形构造的变形机制与触发因素,研究发现灯塔剖面底部的软沉积物变形构造是原位形成与保存的,并被浊流沉积层上覆,且二者之间无背景沉积物。这种独特的事件层组合指示原位变形和异地搬运两种水下沉积过程准同期发生,而能够同时激发这两类物质来源与沉积过程迥异的事件沉积响应的最可能因素是区域强震震动。结合灵山岛研究案例认为,前人所做的模式化的事件沉积成因判别标志不宜直接套用,而控制事件沉积的沉积过程与物理机制具有一定的普适性,应该是事件沉积学研究的关键。

关键词：软沉积变形浊流沉积地震震动沉积响应

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上游水库溃坝对铁路货场的影响分析

工程技术研究 2024年第2期9卷 52-54页

作者：张记东中铁第五勘察设计院集团有限公司北京102600

新建咸宁货场综合物流基地工程选址于王家祠水库下游,一旦水库发生溃坝,将对铁路货场的运营安全构成极大威胁。铁路勘测阶段通过详细调查水库情况,结合铁路工程水文勘测设计规范,研究了上游水库对新建货场选址处流量的影响,为货场的选... 详细信息

新建咸宁货场综合物流基地工程选址于王家祠水库下游,一旦水库发生溃坝,将对铁路货场的运营安全构成极大威胁。铁路勘测阶段通过详细调查水库情况,结合铁路工程水文勘测设计规范,研究了上游水库对新建货场选址处流量的影响,为货场的选址和设计提供了重要参考,相关研究思路可为类似铁路工程的勘察设计提供借鉴。

关键词：上游水库溃坝铁路货场勘测设计溃坝流量

Financial Pressure,Economic Stimulus and Land Transfer with the Aim of Attracting Investment-Empirical Evidence Based on Micro Data of Industrial Land

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China Finance and Economic Review 2020年第3期9卷 50-72页

作者： Shouwei Qi Hui Mao jidong zhang School of Public Finance and Taxation Zhongnan University of Economics and Law

Although China’s local governments are facing greater financial pressure,they often sell industrial land at low prices to attract investment.Local government land transfer strategies refl ect driving mechanisms of officials’behavior.Based on the micro data of about 340000 industrial land sales in 289 prefecture-level cities in China from 2006 to 2015,this paper divides industrial land transfer into two categories,namely land transfer with the aim of attracting investment and normal transfer,according to whether the transfer price is lower than the minimum price stipulated by central government.The paper explores the strategies of industrial land transfer under financial pressure and the motivation differences of officials with the help of changes in local land transfers after the introduction of economic stimulus policies.It is found that financial pressure will signifi cantly reduce local industrial land transfer with the aim of investment attraction.However,after the introduction of economic stimulus policies,although financial pressure has increased,the infl uence of financial pressure on local governments’investment-induced land transfer behavior significantly weakened due to the increase of out-of-system financing channels,thus industrial land transfer with the aim of attracting investment has increased signifi cantly.From the perspective of promotion incentives of officials,officials with longer term were more inclined to sell industrial land to attract investment.Therefore,it is necessary to rationally arrange the financial resources and powers of central and local governments,to adapt reasonable macro control method and strategy,and to build an offi cial evaluation system that meets the needs of high-quality development.

关键词： financial pressure land transfer with the aim of attracting investment industrial land transfer economic stimulus promotion incentive