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Mechanism of diagenetic trap forma.ion in nearshore subaqueous fans on steep rift lacustrine basin slopes—A case study from the shahejie Forma.ion on the north slope of the Minfeng subsag, Bohai Basin, China

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Petroleum science 2014年第4期11卷 481-494页

作者： Wang Yanzhong Cao Yingchang ma.Benben Liu Huimin Gao Yongjin Chen Lin school of Geosciences China University of Petroleum Geological science Research Institute of shengli Oilfield SINOPEC Western new Prospect Research Center of shengli Oilfield SINOPEC

Diagenetic traps in conglomerate in nearshore subaqueous fans in the steep slope zones of rift basins have been important exploration targets for subtle reservoirs in eastern China. However, the mechanism of how those traps were formed is not clear, which inhibits further exploration for this type of reservoir. In order to solve the problem, we take as an example nearshore subaqueous fans in the upper part of the fourth member of the shahejie Forma.ion （Es4s） on the north slope of the Minfeng subsag in the Dongying sag. combining different research methods, such as core observation, thin section examination, scanning electron microscope （sEM） observation, fluid-inclusion analysis, carbon and oxygen isotope analysis of carbonate cements, and analysis of core properties, we studied the genetic mechanisms of diagenetic traps on the basis of diagenetic environment evolution and diagenetic evolution sequence in different sub/micro-facies. conglomerate in Es4s in the north Minfeng subsag experienced several periods of transition between alkaline and acidic environments as ＂alkaline-acidic-alkaline-acidic-weak alkaline＂. As a result, dissolution and cementation are also very complex, and the sequence is ＂early pyrite cementation / siderite cementation / gypsum cementation / calcite and dolomite cementation- feldspar dissolution / quartz overgrowth quartz dissolution / ferroan calcite cementation / ankerite cementation / lime-mud ma.rix recrystallization / feldspar overgrowth carbonate dissolution / feldspar dissolution / quartz overgrowth / pyrite cementation＂. The difference in sedimentary characteristics between different sub/micro-facies of nearshore subaqueous fans controls diagenetic characteristics. Inner fan conglomerates ma.nly experienced compaction and lime-mud ma.rix recrystallization, with weak dissolution, which led to a reduction in the porosity and permeability crucial to reservoir forma.ion. Lime-mud ma.rix recrystallization results in a rapid decrease in p

关键词： nearshore subaqueous fan diagenetic trap genetic mechanism Dongying sag rift basin,lacustrine basin

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“Giant pressure shadow” structure and ore-finding method of tectonic stress field in the Tongchang Cu-Au polymetallic orefield,shaanxi,China:Ⅱ.Dynamics of tectonic ore-forming processes and prognosis of concealed ores

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Chinese Journal Of Geochemistry 2010年第4期29卷 455-463页

作者： HAn Runsheng WAnG Lei ma.deyun GU Xiaochun FAn Zhuguo Kunming University of science and Technology southwest Institute of Geological survey Geological Survey Center for Non-ferrous Mineral Resources Kunming 650093 China Open Laboratory of deposit Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China Yunnan copper lndustry （Group） co. Ltd. 650000 China

The Tongchang orefield is located in the central part of the Mianxian-Lueyang-Yangpingguan area that is celebrated as a 'gold triangle' area,at the juncture of the latitudinal tectonic zone of south Qinling,the Longmenshan Cathysian tectonic zone and the sichuan-Yunnan longitudinal tectonic zone,where there are distributed Cu-Au polymetallic ore deposits(occurrences) including the Tongchang,Chenjiaba,Qinjiabian,Hongtushi,Yinshangou and Xiakouyi ore deposits(mineralization).Based on the "giant pressure shadow" structure put forward and demonstrated by numerical modeling of the tectonic stress field and the static photoelasticity experiments on the basis of tectonic ore-controlling laws in the orefield,tectonic metallogenesis driven by orefield tectonic stress has been discussed in terms of its geological setting,orefield geomechanics,and tectonic stress *** is thought that the dynamic evolution model of the tectonic stress field controls the whole process of forma.ion of the polymetallic ore deposits(mineralization) in the orefield,as well as the deforma.ion *** a result,it controls the emplacement of rockbodies and the transforma.ion of ore-source bodies,and provides both the channel-ways for ore-forming fluids and ore-hosting ***,it controls the migration potential field of fluids and,thereafter,its flow direction,rate and volume;the tectonic stress field also controls the energy field and hence controls the position of occurrence of ore deposits and their *** method of tectonic stress field has been applied to ore prognosis in the *** rules of ma.ma.ic emplacement and metallogenic fluid migrating and concentrating under the control of the structural stress field were expounded,hence providing the theoretical basis for the prognosis of concealed *** addition,a number of important target areas have been defined.

关键词：铜金多金属矿床构造应力场多金属矿田成矿过程找矿方法影子压力结构

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Acoustic emission monitoring of rockbursts during TBM-excavated headrace tunneling at Jinping Ⅱ hydropower station

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Journal of Rock Mechanics and Geotechnical Engineering 2013年第6期5卷 486-494页

作者： Wuwei Cheng Wenyou Wang shiqiang Huang Peng ma HydroChina Huadong Engineering corporation Zhejiang Huadong Engineering safety Technology co. Ltd. Chemical Process Equipment Beijing University of Chemical Technology

To better understand the mechanical properties of ma.ble at Jinping II hydropower station, this paper examines the changes of brittle rocks in excavation dama.ed zones(EDZs) before and after excavation of tunnel with the tunnel boring ma.hine(TBM). The paper attempts to employ the acoustic emission(AE) to study the AE characteristics and distribution of rockburst before and after TBM-excavated tunnel. It is known that the headrace tunnel #2, excavated by the drill-and-blast(D&B) method, is ahead of the headrace tunnel #3 that is excavated by TBM method. The experimental sub-tunnel #2–1, about 2000 m in depth and 13 m in diameter, between the two tunnels is scheduled. In the experimental sub-tunnel #2–1, a large number of experimental boreholes are arranged, and AE sensors are installed within 10 m apart from the wall of the headrace tunnel #3. By tracking the microseismic signals in rocks, the location, frequency, quantity, scope and intensity of the microseismic signals are basically identifed. It is observed that the AE signals ma.nly occur within 5 m around the rock wall, basically lasting for one day before tunnel excavation and a week after excavation. Monitoring results indicate that the rockburst signals are closely related to rock stress adjustment. The rock structure has a rapid self-adjustment capacity before and after a certain period of time during tunneling. The variations of rock stresses would last for a long time before reaching a fnal steady state. Based on this, the site-specifc support parameters for the deep tunnels can be accordingly optimized.

关键词： Acoustic emission(AE) monitoring Tunnel construction Microseismic event Relaxation time Rockbursts

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Effects of the Molecular Weight of PLGA on degradation and Drug Release In vitro from an mPEG-PLGA nanocarrier

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Chemical Research in Chinese Universities 2016年第5期32卷 848-853页

作者： LIU Rui WAnG Yan ma.Yudan WU Yi GUO Yi XU Li Key laboratory for Molecular Enzymology and Engineering Ministry of Education National Engineering Laboratory for AIDS Vaccine School of Life Sciences Jilin University Changchun 130012 P. R. China department of Endocrinology China-Japan Union Hospital Jilin University Changehun 130033 P. R. China college of Pharma.y Jilin University Changchun 130021 P. R. China Jilin Research Institute of sports science Changchun 130022 P. R. China

We successfully synthesized four kinds of copolymers with varying molecular weights of poly（lactide- co-glycolide）（PLGA） to yield methoxy-poly（ethylene glycol）-block-poly（lactide-co-glycolide）（mPEG-PLGA） nano- carriers： mPEG-PLGA（3k）, mPEG-PLGA（9k）, mPEG-PLGA（llk） and mPEG-PLGA（16k）. An antitumor drug, 10-hydroxycamptothecin（HCPT）, was encapsulated into the mPEG-PLGA nanocarrier cores by self-assembly in dialysis. The lower molecular weight nanocarriers degraded more quickly, resulting in ma.s loss, pH decline, and a rapid HCPT release rate in vitro. The degradation and drug release of the nanocarriers were dependent on the PLGA molecular weight. However, the larger molecular weight nanocarriers could not increase the loading content and encapsulation efficiency. considering the antitumor effect of these nanocarriers, the mPEG-PLGA（9k） nanocarrier, which had the highest drug loading content[（7.72±0.57）%] and a relatively high encapsulation efficiency [（22.71±5.53）%], is an optimum agent for drug delivery.

关键词： Poly(lactide-co-glycolide) 10-Hydroxycamptothecin nanocarrier Drug delivery

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液态排渣锅炉全烧和大比例掺烧高碱煤运行优化

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热力发电 2024年第1期53卷 64-72页

作者：周昊李辉马翔李丹张海东刘笑邓月海吴连东刘宇天津华能杨柳青热电有限责任公司天津300380 华能国际电力股份有限公司北京100031 西安热工研究院有限公司陕西西安710054

为掌握液态排渣锅炉全烧和大比例掺烧高碱煤的关键参数和运行经验,基于某电厂300 MW等级液态排渣锅炉进行了长期工程试验,对可能存在的燃烧组织、nO_(x)控制、排渣和沾污等问题进行分析,针对性的对燃烧系统、热物改性系统和排渣系统进... 详细信息

为掌握液态排渣锅炉全烧和大比例掺烧高碱煤的关键参数和运行经验,基于某电厂300 MW等级液态排渣锅炉进行了长期工程试验,对可能存在的燃烧组织、nO_(x)控制、排渣和沾污等问题进行分析,针对性的对燃烧系统、热物改性系统和排渣系统进行了改造。并进行了长期的运行数据记录和关键参数记录,在全烧和高比例掺烧高碱煤30万t后,锅炉各项运行参数正常。工程试验证明:该电厂300 MW等级液态排渣锅炉经升级优化后对高碱煤的的适应能力极强,在燃煤组分w(Al_(2)O_(3))nO_(x)生成量也较燃用原设计煤种下降超30%。

关键词：高碱煤液态排渣锅炉运行优化沾污结渣

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黔东南地区牛蹄塘组页岩孔隙结构多尺度表征及其对页岩气富集的影响

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中国地质 2024年第1期51卷 57-72页

作者：葛明娜包书景石砥石马勇张金川张琴张立勤林燕华王婷中国地质调查局油气资源调查中心北京100083 多资源协同陆相页岩油绿色开采全国重点实验室黑龙江大庆163712 中国石油大学(北京) 北京102249 中国地质大学(北京) 北京100083 中国石油勘探开发研究院北京100083

[研究目的]研究黔东南地区牛蹄塘组页岩孔隙结构特征及其对页岩气富集的影响,抛开不利因素,为黔东南地区页岩气勘探提供建议。[研究方法]通过聚焦离子束扫描电镜(FIB-sEM)、场发射扫描电镜(FE-sEM)和氮气吸附等手段,对页岩微纳米孔隙结... 详细信息

[研究目的]研究黔东南地区牛蹄塘组页岩孔隙结构特征及其对页岩气富集的影响,抛开不利因素,为黔东南地区页岩气勘探提供建议。[研究方法]通过聚焦离子束扫描电镜(FIB-sEM)、场发射扫描电镜(FE-sEM)和氮气吸附等手段,对页岩微纳米孔隙结构进行多尺度表征,并结合研究区牛蹄塘组页岩的生烃及埋藏史,研究构造运动与孔隙结构关系,进而分析对页岩气富集的影响。[研究结果]牛蹄塘组页岩主要发育毫米级微裂缝、微米级黄铁矿晶间孔以及纳米级有机质孔隙,以墨水瓶状孔隙和平板结构的狭缝孔为主,孔隙结构复杂;结合FIB-sEM三维重构结果,有机质在页岩中占比较高,其孔隙度在0.04%~2.48%,对总孔隙的贡献率介于14%~96%,与有机质共生的黄铁矿晶间孔是沟通裂缝的主要孔隙类型;该地区页岩气赋存状态以欠饱和的吸附气为主,游离气含量偏低。[结论]牛蹄塘组页岩大量构造裂缝,沟通了有机质孔及黄铁矿晶间孔,改变了原有孔隙结构,致使原位聚集的页岩气沿裂缝逸散,是牛蹄塘组页岩含气量低的关键因素。热演化程度适中、构造保存好的区域是古隆起周缘下一步页岩气勘探的有利方向。

关键词：页岩气孔隙结构三维重构古隆起周缘保存条件油气地质调查工程黔东南地区

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中外翼数字化装配精加工系统设计及关键技术研究

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航空制造技术 2024年第1期67卷 98-105页

作者：封璞加张轲马峥翔高谊川陈治宏翁兴东王战玺航空工业陕西飞机工业有限责任公司汉中723213 空装驻汉中地区军事代表室汉中723213 西北工业大学西安710072

航空产品各组件对合面的形位公差要求很高,传统的手动及半自动加工方法效率低、精度差,很难满足任务需求。为了提高某大型飞机机翼发房尾舱与中外翼的对合精度,本文基于逆向工程技术提出一种自动测量技术,与数控机床结合,进行对合面铣... 详细信息

航空产品各组件对合面的形位公差要求很高,传统的手动及半自动加工方法效率低、精度差,很难满足任务需求。为了提高某大型飞机机翼发房尾舱与中外翼的对合精度,本文基于逆向工程技术提出一种自动测量技术,与数控机床结合,进行对合面铣削制孔加工的解决方案。根据工艺需求,利用激光扫描仪实现空间大部件对接面轮廓尺寸检测、基准提取和铣削量计算的方法,并通过试验进行了验证。结果表明,该系统显著提高了机翼发房尾舱与中外翼的装配精度和装配效率,具有很高的应用价值及推广意义,同时对其他复杂结构件的数字化设计、加工技术研究也有着积极的促进作用。

关键词：逆向工程数控加工自动测量精加工激光扫描仪

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Culture of yeast cells immobilized by alginate-chitosan microcapsules in aqueous-organic solvent biphasic system

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Journal of Oceanology and Limnology 2019年第3期37卷 863-870页

作者： HOU Dandan YU Weiting ZHAnG demeng ZHAO Lili LIU Xiudong ma.Xiaojun college of Environment and Chemical Engineering Dalian UniversityDalian 116622China Affiliated Zhongshan Hospital of Dalian University Dalian 116001China state Key Laboratory of Bioactive seaweed substances Qingdao Brightmoon Seaweed Group Co.Ltd.Qingdao 266400China Dalian Institute of Chemical Physics Chinese Academy of SciencesDalian 116023China

Immobilization biocatalysis is a potential technology to improve the activity and stability of biocatalysts in nonaqueous systems for efficient industrial ***-chitosan(AC)microcapsules were prepared as immobilization carriers by emulsifi cation-internal gelation and complexation reaction,and their contribution on facilitating the growth and metabolism of yeast cells were testifi ed successfully in culture medium-solvent biphasic *** cell growth in AC microcapsules is superior to that in alginate beads,and the cells in both immobilization carriers ma.ntain much higher activity than free cells,which demonstrates AC microcapsules can confer yeast cells the ability to resist the adverse effect of ***,the performa.ce of AC microcapsules in biphasic systems could be improved by adjusting the forma.ion of outer polyelectrolyte complex(PEC)membrane to promote the cell growth and metabolic ability under the balance of resisting solvent toxicity and permitting substrate ***,these findings are quite valuable for applying AC microcapsules as novel immobilization carriers to realize the biotransforma.ion of value-added products in aqueous-solvent biphasic systems.

关键词： alginate-chitosan(AC)microcapsules immobilization biocatalysis aqueous-solvent biphasic system cell growth

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secure personal data sharing in cloud computing using attribute-based broadcast encryption

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The Journal of China Universities of Posts and Telecommunications 2014年第6期21卷 45-51,77页

作者： FU Jing-yi HUAnG Qin-long ma.Zhao-feng YAnG Yi-xian Informa.ion security Center Beijing University of Posts and Telecommunications national Engineering Laboratory for Disaster Backup and Recovery Beijing University of Posts and Telecommunications Beijing national security science and Technology co. Ltd

The ciphertext-policy（CP） attribute-based encryption（ABE）（CP-ABE） emergings as a promising technology for allowing users to conveniently access data in cloud computing. Unfortunately, it suffers from several drawbacks such as decryption overhead, user revocation and privacy preserving. The authors proposed a new efficient and privacy-preserving attribute-based broadcast encryption（BE）（ABBE） named EP-ABBE, that can reduce the decryption computation overhead by partial decryption, and protect user privacy by obfuscating access policy of ciphertext and user＇s attributes. Based on EP-ABBE, a secure and flexible personal data sharing scheme in cloud computing was presented, in which the data owner can enjoy the flexibly of encrypting personal data using a specified access policy together with an implicit user index set. With the proposed scheme, efficient user revocation is achieved by dropping revoked user＇s index from the user index set, which is with very low computation cost. Moreover, the privacy of user can well be protected in the scheme. The security and performa.ce analysis show that the scheme is secure, efficient and privacy-preserving.

关键词： data sharing ABBE ABE user revocation partial decryption privacy preserving

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新能源电力系统振荡薄弱点定位方法研究

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浙江电力 2024年第3期43卷 1-7页

作者：马骏超高磊陈晓刚吕敬彭琰王晨旭刘佳宁国网浙江省电力有限公司电力科学研究院杭州310014 电力传输与功率变换控制教育部重点实验室(上海交通大学) 上海200240 国网浙江省电力有限公司杭州310007

为减轻振荡对新能源电力系统的冲击,有必要在线评估系统稳定状态并定位系统振荡薄弱点,提前采取措施。为此,分别从端口频域特性和时域响应角度提出两种新能源电力系统振荡薄弱点定位方法。频域方法基于新能源场站端口阻抗特性评估系统... 详细信息

为减轻振荡对新能源电力系统的冲击,有必要在线评估系统稳定状态并定位系统振荡薄弱点,提前采取措施。为此,分别从端口频域特性和时域响应角度提出两种新能源电力系统振荡薄弱点定位方法。频域方法基于新能源场站端口阻抗特性评估系统稳定状态,并根据各新能源场站端口阻抗实部的大小定位薄弱场站。时域方法通过主动注入宽频小扰动信号,利用HHT(希尔伯特-黄变换)分析各新能源场站端口电流响应,提取薄弱模态的阻尼比,根据阻尼比大小定位薄弱场站。以三个风电场构成的小型新能源系统为例,对上述两种定位方法的有效性进行验证,结果表明两种方法均能准确定位系统振荡的薄弱点。

关键词：新能源电力系统振荡薄弱点定位频域时域希尔伯特-黄变换

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