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Grounded-source short offset transient electromagnetic method:Theory and applications in deep mineral exploration

Science China Earth Sciences 2025年第2期68卷 626-638页

作者： Guoqiang XUE Xin WU weiying chen Nannan ZHOU Key Laboratory of Mineral Resources Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China

The Transient Electromagnetic(TEM)method is a critical geophysical technique for subsurface exploration of metal ore bodies,primarily utilizing either loop or grounded *** Long Offset Transient Electromagnetic(LOTEM)method employs a grounded-source transmitter,relying on a far-source observation mode and plane wave approximation for ***,LOTEM's far-source configuration weakens signal strength,and the plane wave approximation reduces precision,limiting effective detection depth to approximately 1000 m with a comprehensive error of about 15%.Recently,we have developed the grounded-source Short Offset Transient Electromagnetic(SOTEM)method,achieving greater detection depth and accuracy within the 500–2000 m depth range,a crucial interval for mineral resource *** study explores the theoretical framework,instrumentation,data processing,and field applications of *** on a point charge element model,SOTEM accurately computes surface wave effects in EM field calculations,optimized for near-source ***-power,high-resolution,wide-bandwidth exploration equipment and an advanced three-dimensional hybrid inversion technique were also developed to enhance the method's *** of SOTEM to the deep exploration of the Zhou'an Ni-Cu-PGE deposit in Henan Province yielded high-resolution imaging of conductivity structures to about 2.5 km *** results,consistent with existing drill data,delineated mineralized ore bodies from surrounding formations,identified zones of mineralization potential,and suggested extensive resource prospects in the region.

关键词： Far-source observation Plane wave model approximation Grounded-source short-offset transient electromagnetic method Wide-bandwidth exploration equipment Three-dimensional hybrid inversion

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Study on HCI removal for medical waste pyrolysis and combustion using a TG-FTIR analyzer

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Frontiers of Environmental Science & Engineering 2015年第2期9卷 230-239页

作者： Hongmei ZHU weiying chen Xuguang JIANG Jianhua YAN Yong CHI College of Automation Hangzhou Dianzi University Hangzhou 310018 China Hangzhou Boiler Group Co. Ltd. Hangzhou 310021 China State Key Laboratory of Clean Energy Utilization Zhejiang University Hangzhou 310013 China

Under both pyrolysis and combustion condition, HCl removal efficiency for medical waste with Cabased additives was semi-quantitatively studied by means of TG-FTIR. Additionally, the difference of HCl removal efficiency for PVC and medical waste was compared. Experimental results showed that： 1） Thermal degradation of medical waste mainly took place in two steps under both pyrolysis and combustion condition; 2） HC1 emitted at both two steps and HCl concentration increased with the increased of Cl ratio in the medical waste; 3） for the same additive, HCI concentration decreased with the increased of additives amount, that is to say, HCI removal efficiency of medical waste increased as the increased of Ca/Cl molar ratio. Fourth, when Ca（OH）2 was used as additive, HCl removal efficiency for medical waste combustion was a little higher than that for medical waste pyrolysis, but either CaCO3 or CaO was used as additive, it was just opposite, more specifically, when CaCO3 was used as additive with Ca/CI= 1.3, HC1 removal efficiency was 5.49% under pyrolysis condition, but that was only 4.24% under combustion condition. Fifth, under the same Ca/CI molar ratio, HCl removal efficiency for PVC was higher than that for medical waste under both pyrolysis and combustion condition, more specifically, when Ca（OH）2 was used as additive with Ca/Cl-1, HCl removal efficiency was 64.51% for PVC, but that was only 27.66% for medical waste pyrolysis with 4% Cl under pyrolysis condition .

关键词： pollution medical waste pyrolysis combustion TG-FTIR HCl removal

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Three-dimensional electrical structure model of the Yangbajain geothermal field in Tibet:Evidence obtained from magnetotelluric data

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Science China Earth Sciences 2023年第8期66卷 1839-1852页

作者： Guoqiang XUE weiying chen Ping ZHAO Wangqi REN Yiming HE Pengfei LV Kangxin LEI Yang ZHAO Key Laboratory of Mineral Resources Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China College of Earth Science University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Tibetan Plateau Earth System Resources and Environment(TPESRE)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China School of Geosciences and Info-Physics Central South UniversityChangsha 410083China

The Yangbajain Geothermal Field in Tibet is located in the fault subsidence basin of the central Yadong-Gulu Rift *** spatial distribution of the field is controlled by mountain-front fault zones on the northwestern and southeastern sides of the *** power has been generated in Yangbajain for more than 40 ***,owing to the lack of threedimensional(3D) geophysical exploration data,key geological issues related to the partial melt body of the Yangbajain Geothermal Field,such as its location,burial depth,and geometric form,as well as the ascending channel of the geothermal fluid,have for a long time been *** this study,3D inversion was performed using measured geo-electromagnetic total impedance tensor data from 47 survey *** extracted horizontal sections at different depths and profiles,and at different lines,reflect the 3D electrical structure model of the geothermal field in the study ***,three findings were ***,the partial melt body,located below the China-Nepal Highway extending along the northeast direction,is the heat source of the Yangbajain Geothermal *** burial depth range of the molten body was determined to range between approximately 6.2 and 14 ***,the geothermal fluid ascended a horn-shaped circulation channel with an up-facing opening,located in the northern section of the sulfur ditch *** study results revealed that deep rock fissures(>2 km) were not well developed and had poor *** addition,no layered heat reservoirs with high water richness were observed in the northern part of the study ***,the application of enhanced geothermal system(EGS) technology in the northern region would be essential to improving the power generation capacity of the Yangbajain Geothermal *** addition,the study found no deep high-temperature heat storage areas in the southern region of the study area.

关键词： Geothermal field Magnetotelluric Partial melt body 3D electrical structure Thermal reservoir geological model

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论禅宗语言交际的终极合作

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浙江大学学报（人文社会科学版） 2017年第2期47卷 115-125页

作者：陈伟英浙江大学外国语言文化与国际交流学院浙江杭州310058

禅宗典籍中最有魅力的是公案,公案语录属于对话交际的一种,禅师通过公案接引后学,学人凭借公案验证佛理。从语用学的合作原则来看,公案语言充满对合作原则四个准则的背离,却处处体现着禅师的良苦用心。这些看似违背合作原则的言语实际... 详细信息

禅宗典籍中最有魅力的是公案,公案语录属于对话交际的一种,禅师通过公案接引后学,学人凭借公案验证佛理。从语用学的合作原则来看,公案语言充满对合作原则四个准则的背离,却处处体现着禅师的良苦用心。这些看似违背合作原则的言语实际上却是以表面不合作达到终极合作,其宗旨是实现心灵主体的超越,达到回归本心的境界。要保证公案交际的成功,交际内容、主体和语境这三个要素缺一不可,只有禅师用原发自创的个性化方式,在日常性的禅修中应机接物,交流禅体验,才是合作原则的终极体现。执着于表面文字,无法摆脱言语羁绊,或是学到皮毛后程式化地仿效祖师言句,都是背道而驰,离悟道之门愈行愈远,灭失了禅宗的独立精神。

关键词：禅语言交际公案顿悟合作原则

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Large-depth hydrogeological detection in the North China-type coalfield through short-offset grounded-wire TEM

Large-depth hydrogeological detection in the North China-typ...

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中国科学院地质与地球物理研究所2015年度（第15届）学术年会

作者： NanNan Zhou GuoQiang Xue weiying chen Jiulong cheng Institute of Geology and Geophysics Chinese Academy of Science China University of Mining and Technology

The North China-type coalfield is the most important coalfield in *** the development of Chinese economy,shallow coal resources(\600 m)have been exhausted and large-depth detection is being ***-inrush is disastrous for coal ***,large-depth(600–1200 m)detection of water-filled zones in the North China-type coalfield is a difficult geophysical task due to its low-resistivity *** traditional loop-source transient electromagnetic method(TEM)cannot realize large-depth *** the other hand,high-resolution detection of LOTEM is limited by the problem of recording points and large volume *** explore the large-depth targets with high-resolution,Short-offset grounded TEM(SOTEM)was applied in the North China-type *** is one branch of grounded-wire *** response of SOTEM is calculated using superposing-dipole method rather than the direct-dipole approximation,which is used in the calculation of the response of *** paper analyzes the comparison of the resolution and detection depth between SOTEM and loop-source TEM at *** to the loop-source TEM with frequently used parameters,the detection depth of SOTEM with the usual setup parameters is about twice of magnitude,and the resolution capability of SOTEM at large depth is higher than that of loop-source ***,the resolution capability and detection depthbetween LOTEM and SOTEM are *** the grounded-wire TEM,offsets are strictly related to the detection ***,the detection depth of LOTEM with larger receiver–transmitter offset will be ***,at the depth of 600–1200 m,the resolution capability to conductive targets of SOTEM is higher than that of *** last,SOTEM with a 1000-m long source and1000–2000 m offset is applied to the 1200 m-depth exploration of water-filled zones in the North China-type *** induced voltage is observed and transformed into magnetic ***,the data is inverted using the least mean fou

关键词： Short-offset grounded TEM The North China-type coalfield Low-resistivity coverage Waterrich region Large-depth detection

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电性源地-井瞬变电磁法全分量响应特性与探测能力分析

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地球物理学报 2019年第5期62卷 1969-1980页

作者：陈卫营韩思旭薛国强中国科学院矿产资源研究重点实验室中国科学院地质与地球物理研究所北京100029 中国科学院地球科学研究院北京100029 广东省核工业地质局二九三大队广州510800

结合地面电性源瞬变电磁法(TEM)探测深度大和地-井TEM探测精度高的优点,本文提出对电性源地-井TEM进行研究.基于一维正演理论,本文对电性源在地下激发的六个电磁场分量的扩散、分布特性和探测能力进行分析研究.研究结果表明地下瞬变场... 详细信息

结合地面电性源瞬变电磁法(TEM)探测深度大和地-井TEM探测精度高的优点,本文提出对电性源地-井TEM进行研究.基于一维正演理论,本文对电性源在地下激发的六个电磁场分量的扩散、分布特性和探测能力进行分析研究.研究结果表明地下瞬变场各分量的分布特征与地面情况类似,但是对地层的探测能力与地面情况存在较大差别.各分量的探测能力与它们的扩散特性有关,其中受积累电荷作用,垂直电场E_z和水平磁场■分量对目标层的反映最为明显,E_x和■分量在地下扩散时受"返回电流"的影响会出现变号现象,使得异常体带来的影响被掩盖,不易被分辨.本文研究结果为发展电性源地-井TEM的施工技术、数据处理与解释,建立了相应的理论基础,获得了对该方法的初步认识.

关键词：电性源地-井TEM 地下瞬变场响应特性探测能力

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风-燃互补联合发电系统的控制策略及应用研究

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太阳能学报 2017年第8期38卷 2097-2105页

作者：柴炜陈为赢蔡旭李征上海交通大学电子信息与电气工程学院风力发电研究中心上海200240

为解决区域电网绿色能源的平稳外送问题,提出由燃气-蒸汽联合循环机组与区域内多个风电场共同组成风-燃互补联合发电系统的控制方案。首先建立考虑转速控制、温度控制和燃料控制等的燃机综合模型,由动态响应曲线可知其响应时间短、调节... 详细信息

为解决区域电网绿色能源的平稳外送问题,提出由燃气-蒸汽联合循环机组与区域内多个风电场共同组成风-燃互补联合发电系统的控制方案。首先建立考虑转速控制、温度控制和燃料控制等的燃机综合模型,由动态响应曲线可知其响应时间短、调节速度快,具备补偿风功率波动的能力。在此基础上提出风-燃互补的双层复合控制策略,计划调度层通过风功率预测得到燃机基准功率,实时优化层综合考虑机组耐用度和控制效果,实时补偿风功率波动和频率偏差,从而使联络线功率按计划运行并维持系统频率稳定。最后,以中国某海岛电网为应用案例搭建RTDS全岛仿真平台,验证所提控制策略的有效性。

关键词：风-燃联合系统计划调度实时优化联合循环机组动态响应

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短偏移瞬变电磁探测系统研究

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地球物理学报 2023年第8期66卷 3514-3523页

作者：薛国强武欣陈卫营中国科学院矿产资源研究重点实验室中国科学院地质与地球物理研究所北京100029 中国科学院大学地球与行星科学学院北京100049

短偏移距瞬变电磁法是近年来发展出的新方法,具有信号强、带宽大的特点,现有国际主流装备是面向传统大收发距模式设计开发的窄带系统,研发小收发距模式下的大电流宽带系统,对于推广应用新方法具有重要意义.为此,本文提出大电流快关断发... 详细信息

短偏移距瞬变电磁法是近年来发展出的新方法,具有信号强、带宽大的特点,现有国际主流装备是面向传统大收发距模式设计开发的窄带系统,研发小收发距模式下的大电流宽带系统,对于推广应用新方法具有重要意义.为此,本文提出大电流快关断发射、低噪声宽频带接收设计方案,攻克超高压恒压钳位技术,自适应可变阻尼技术等核心技术.在同等条件下有效发射功率提升约2.5倍,关断时间压缩近4倍;系统时域噪声水平0.1 nT/s,工作带宽25 kHz.装备系统在增大发射电流和降低噪声的同时,拓展了系统带宽,实现了装备系统与新方法的强匹配.新装备的研发将为我国3000 m以浅矿产资源精细探测做出贡献.

关键词：短偏移瞬变电磁大功率大带宽低噪声自主研发

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指称语使用中自指偏误的成因探究——以英语国家汉语学习者为例

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浙江大学学报（人文社会科学版） 2019年第1期49卷 129-140页

作者：陈伟英谢莉浙江大学国际合作与交流处浙江杭州310058 浙江大学外国语言文化与国际交流学院浙江杭州310058

指称语的使用受到认知可及度、语用指称意向以及语言本身的语法、语篇因素的影响。以母语者使用倾向为参照,通过测量语篇实体的可及度,深入探讨指称语的选择过程,可发现汉语学习者自指偏误的成因如下:多余偏误主要出现在可及度较高时,... 详细信息

指称语的使用受到认知可及度、语用指称意向以及语言本身的语法、语篇因素的影响。以母语者使用倾向为参照,通过测量语篇实体的可及度,深入探讨指称语的选择过程,可发现汉语学习者自指偏误的成因如下:多余偏误主要出现在可及度较高时,输出话题链存在困难,而可及度较低时,对语篇线索的指示作用认识不到位;缺省偏误多见于可及度较低时,未能利用情节标记准确判断语篇连贯度,而可及度较高时,未能识别指称意向增强所带来的语用效果。汉语以零句为根本,述谓语具有指称性,学习者需恰当、灵活地使用指称语。

关键词：指称语自指偏误认知可及度指称意向汉语语法语篇因素

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Effect of add-on therapy with Traditional Chinese Medicine on the survival of patients with anemic lower-risk myelodysplastic syndromes in the real-world setting:a retrospective study

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Journal of Traditional Chinese Medicine 2025年第1期45卷 152-159页

作者： QU weiying TAN Xyucheng ZHAO Yihan YU Yanan ZHAO Lin Department of Hematology Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine Institute of Basic Research in Clinical Medicine China Academy of Chinese Medical Sciences Department of Hematology and chen Jianjie National Famous Old Chinese Medicine Expert Inheritance Studio Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine

OBJECTIVE: To illustrate the effect of add-on therapy of Traditional Chinese Medicine(TCM) on the long-term survival of anemic lower-risk myelodysplastic syndromes(LR-MDS) patients. METHODS: In this study, we conducted a retrospective analysis of the data of patients with LR-MDS who were identified from Shuguang Hospital between January 2006 and June 2020. The Kaplan-Meier method was used to calculate overall survival(OS), while the Cox model was employed to analyze prognostic factors of long-term survival. A total of 162 patients who met the inclusion criteria were divided into two groups: the TCM group(n = 78) or the non-TCM group(n = 84). RESULTS: There were no significant differences in baseline characteristics. The cumulative survival rate of the TCM group was significantly higher than that of the non-TCM group [log-rank P = 0.029, hazard ratio(HR) = 0.484, 95% confidence interval(CI)(0.249, 0.942), P 0.05). CONCLUSIONS: The integration of TCM and Western Medicine has the potential to extend the OS of LR-MDS patients when compared to the use of Western Medicine alone.

关键词： lower-risk myelodysplastic syndromes medicine, Chinese traditional overall survival retrospective studies

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