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Hollow glass microspheres/silicone rubber composite materials toward materials for high performance deep in-situ temperaturepreserved coring

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Petroleum Science 2022年第1期19卷 309-320页

作者： Jian-Ping yang Ling Chen Xiao-Bin Gu Zhi-Yu Zhao Cheng-Hang Fu dong-sheng yang dong-Zhuang Tian Zhi-sheng Chen He-Ping Xie College of Polymer Science and Engineering Sichuan UniversityChengdu610065China Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization Institute of Deep Earth Sciences and Green EnergyCollege of Civil and Transportation EngineeringShenzhen UniversityShenzhen518060China School of Mechanical Engineering Sichuan UniversityChengdu610065China Jinshi Drilltech Company Limited Tangshan063004Hebei Institute of New Energy and Low-Carbon Technology Sichuan UniversityChengdu610065China College of Water Resource&Hydropower Sichuan UniversityChengdu610065China Xi'an Research Institute China Coal Technology&Engineering Group CorpXi'an710077China

Deep petroleum resources are stored under high temperature and pressure conditions,with the temperature having a significant influence on the properties of *** in-situ temperature-preserved coring(ITP-coring)devices were developed to assess deep petroleum reserves ***,hollow glass microspheres(HGMs)/silicone rubber(SR)composites that exhibit excellent thermal insulation properties were prepared as thermal insulation materials for deep ITP-coring *** mechanism and process of heat transfer in the composites were explored,as well as their other *** results show that the HGMs exhibit good compatibility with the SR *** the volume fraction of the HGMs is increased to 50%,the density of the HGMs/SR composites is reduced from 0.97 to 0.56 g/cm^(3).The HGMs filler introduces large voids into the composites,reducing their thermal conductivity to 0.11 W/m·*** addition of HGMs into the composites further enhances the thermal stability of the SR,wherein the higher the HGMs filler content,the better the thermal stability of the *** significantly enhance the mechanical strength of the *** increase the compressive strength of the composites by 828%and the tensile strength by 164%.Overall,HGMs improve the thermal insulation,pressure resistance,and thermal stability of HGMs/SR composites.

关键词： In-situ temperature-preserved coring(ITP-coring) Deep in-situ conditions Thermal insulation materials HGMs/SR composites

FAAD:an unsupervised fast and accurate anomaly detection method for a multi-dimensional sequence over data stream

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Frontiers of Information Technology & Electronic Engineering 2019年第3期20卷 388-404页

作者： Bin LI Yi-jie WANG dong-sheng yang Yong-mou LI Xing-kong MA Science and Technology on Parallel and Distributed Processing Laboratory College of ComputerNational University of Defense Technology Block Chain Research Institute of LianLian Pay

Recently, sequence anomaly detection has been widely used in many fields. Sequence data in these fields are usually multi-dimensional over the data stream. It is a challenge to design an anomaly detection method for a multi-dimensional sequence over the data stream to satisfy the requirements of accuracy and high speed. It is because:(1) Redundant dimensions in sequence data and large state space lead to a poor ability for sequence modeling;(2) Anomaly detection cannot adapt to the high-speed nature of the data stream, especially when concept drift occurs, and it will reduce the detection rate. On one hand, most existing methods of sequence anomaly detection focus on the single-dimension sequence. On the other hand, some studies concerning multi-dimensional sequence concentrate mainly on the static database rather than the data stream. To improve the performance of anomaly detection for a multi-dimensional sequence over the data stream, we propose a novel unsupervised fast and accurate anomaly detection(FAAD) method which includes three algorithms. First, a method called "information calculation and minimum spanning tree cluster" is adopted to reduce redundant dimensions. Second, to speed up model construction and ensure the detection rate for the sequence over the data stream, we propose a method called"random sampling and subsequence partitioning based on the index probabilistic suffix tree." Last, the method called "anomaly buffer based on model dynamic adjustment" dramatically reduces the effects of concept drift in the data stream. FAAD is implemented on the streaming platform Storm to detect multi-dimensional log audit *** with the existing anomaly detection methods, FAAD has a good performance in detection rate and speed without being affected by concept drift.

关键词： Data stream Multi-dimensional sequence Anomaly detection Concept drift Feature selection

Transition-Metal-Free Allylic Defluorination Cross-Electrophile Coupling Employing Rongalite

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Chinese Journal of Chemistry 2024年第12期42卷 1360-1366页

作者： Xiang-Long Chen Chun-Yan Wu dong-sheng yang Bo-Cheng Tang Huai-Yu Wang Zhi-Cheng Yu Anling Li Yan-dong Wu An-Xin Wu National Key Laboratory of Green Pesticide International Joint Research Center for Intelligent Biosensor Technology and HealthCollege of ChemistryCentral China Normal UniversityWuhanHubei 430079China state Key Laboratory of Chemical Biology and Drug Discovery Department of Applied Biology and Chemical Technology The HongKong Polytechnic UniversityKowloonHong Kong SARChina Department of Clinical Laboratory Center for Gene Diagnosisand Program of Clinical Laboratory MedicineZhongnan Hospital of Wuhan UniversityWuhanHubei 430062China

Comprehensive Summary The conversion of CF3-alkenes to gem-difluoroalkenes using reductive cross-coupling strategy has received much attention in recent years,however,the use of green and readily available reducing salt to mediate these reactions remains to be *** this work,a concise construction of gem-difluoroalkenes,which requires neither a catalyst nor a metal reducing agent,was ***,a safe and inexpensive industrial product,was employed as both a radical initiator and *** procedure was compatible with both linear and cyclic diaryliodonium salts,enabling a wide variety of substrates(>70 examples).The utility of this approach was demonstrated through gram-scale synthesis and efficient late-stage functionalizations of anti-inflammatory drugs.

关键词： Defluoroarylation Transition metal free gem-Difluoroalkenes Rongalite Single electron transfer C-C coupling Redox reactions Cross-coupling

Cross-Reference Benchmarks for Translating the Genetic Soil Classification of China into the Chinese Soil Taxonomy

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Pedosphere 2006年第2期16卷 147-153页

作者： SHI Xue-Zheng YU dong-sheng yang Guo-Xiang WANG Hong-Jie SUN Wei-Xia DU Guo-Hua State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences Nanjing210008 （China）.

Soil classification is the foundation for exchange and extension of research findings in soil science and for modern management of soil resources. This study explained database and research methodology to create a cross-reference system for translating the Genetic Soil Classification of China (GSCC) into the Chinese Soil Taxonomy (CST). With the help of the CST keys, each of the 2 540 soil species in GSCC has been interpreted to its corresponding soil order, suborder, great group, and sub-group in CST. According to the methodology adopted, the assigned soil species have been linked one another to their corresponding polygons in the 1:1000000 digital soil map of China. Referencibility of each soil species between the GSCC and CST systems was determined statistically on the basis of distribution area of each soil species at a high taxon level of the two systems. The soils were then sorted according to their maximum referencibility and classified into three categories for discussion. There were 19 soil great groups in GSCC with maximum referencibility > 90% and 22 great groups between 60%-90%. These soil great groups could serve as cross-reference benchmarks. There were 19 great groups in GSCC with maximum referencibility < 60%, which could be used as cross-reference benchmarks until new and better results were available. For these soils, if the translation was made at a lower soil taxon level or on a regional basis, it would improve their referencibility enabling them to serve as new cross-reference benchmarks.

关键词： 1:1 000 000 soil map of China cross-reference benchmark CST GSCC referencibility

Deep original information preservation by applying in-situ film formation technology during coring

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Petroleum Science 2022年第3期19卷 1322-1333页

作者： Liang-Yu Zhu Tao Liu Zhi-Yu Zhao Yi-Fan Wu dong-sheng yang Xiang-Chao Shi Zhi-Qiang Liu Fei-Fei Lu Pei Qin Xiao-Liang Gao State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu610500China Institute of New Energy and Low-Carbon Technology Sichuan UniversityChengdu610065SichuanChina College of Polymer Science and Engineering Sichuan UniversityChengdu610065China Zaoshenzhuang Village Hancheng TowuLubei DistrictTangshan064002HebeiChina Xi'an Research Institute China Coal Technology&Engineering Group CorpXi'an710077China State Key Laboratory of Coking Coal Exploitation and Comprehensive Utilization Pingdingshan467000China Institute of Coal Mining and Utilization Pingdingshan Tianan Coal Mining Co.LTD.Pingdingshan467000China

Accurately obtaining the original information of an in-situ rock via coring is a significant guiding step for exploring and developing deep oil and gas *** is difficult for traditional coring technology and equipment to preserve the original information in deep *** study develops a technology for insitu substance-preserved(ISP),moisture-preserved(IMP),and light-preserved(ILP)*** technology stores the original information in real time by forming a solid sealing film on the in-situ sample during *** study designed the ISP-IMP-ILP-Coring process and *** addition,an ISP-IMP-ILPCoring process simulation system was *** effects of temperature,pressure,and film thickness on the quality of the in-situ film were investigated by performing in-situ film-forming simulation experiments.A solid sealing film with a thickness of 2-3 mm can be formed;it completely covers the core sample and has uniform *** film maintains good ISP-IMP-ILP properties and can protect the core sample in the in-situ environment *** study verifies the feasibility of“film formation during coring”technology and provides strong support for the engineering application of ISP-IMP-ILPCoring technology.

关键词： Deep resource exploitation Original information ISP-IMP-ILP-Coring Solid sealing film In-situ film-forming Film formation during coring

A Novel Method to Simulating Transient Response of Interconnects

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A Novel Method to Simulating Transient Response of Interconn...

Long-term effects of biodegradable versus durable polymer-coated sirolimus-eluting stents on coronary arterial wall morphology assessed by virtual histology intravascular ultrasound

2005 6th International Conference on ASIC

作者： Xin-zhi Shi dong-sheng yang Gaofeng Wang Academy of Microelectronics ＆ Information Technology Wuhan Univerisity

＜正＞a novel approach for transient analysis of coupled transmission line circuits based on the generalized inverse matrix Pade approximation （GIMPA） is *** numerical result proved that this approach is efficient a... 详细信息

关键词： Transient response Transmission line matrix methods Integrated circuit interconnections Coupling circuits Distributed parameter circuits Circuit simulation Polynomials Transient analysis Propagation losses Dispersion

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Chinese Medical Journal 2011年第6期124卷 836-844页

作者： LIU Hui-liang JIN Zhi-geng LUO Jian-ping MA dong-xing yang sheng-li LIU Ying HAN Wei JING Li-min MENG Rong-ying ZHANG Jiao Department of Cardiology General Hospital of Chinese People's Armed Police Forces Beijing 100039 China

Background The durable presence of polymer coating on drug-eluting stent （DES） surface may be one of the principal reasons for stent thrombosis. The long-term coronary arterial response to biodegradable polymer-coated sirolimus-eluting stent （BSES） in vivo remained *** Forty-one patients were enrolled in this study and virtual histology intravascular ultrasound （VH-IVUS） was performed to assess the native artery vascular responses to BSES compared with durable polymer-coated SES （DSES） during long-term follow-up （median： 8 months）. The incidence of necrotic core abutting to the lumen was evaluated at *** With similar in-stent late luminal loss （0.15 mm （0.06-0.30 mm） vs. 0.19 mm （0.03-0.30 mm）, P=0.772）, the overall incidence of necrotic core abutting to the lumen was significantly less in BSES group than in DSES group （44% vs.63%, P 〈0.05）（proximal 18%, stented site 14% and distal 12% in BSES group, proximal 19%, stented site 28% and distal 16% in DSES group）. The DSES-treated segments had a significant higher incidence of necrotic core abutting to the lumen through the stent struts （73% vs. 36%, P 〈0.01）. In addition, more multiple necrotic core abutting to the lumen was observed in DSES group （overall： 63% vs. 36%, P 〈0.05）. Furthermore, when the stented segments with necrotic core abutting to the lumen had been taken into account only, DSES-treated lesions tended to contain more multiple necrotic core abutting to the lumen through the stent struts than BSES-treated lesions （74% vs. 33%）, although there was no statistically significant difference between them （P=0.06）.Conclusions By VH-IVUS analysis at follow-up, a greater frequency of stable lesion morphometry was shown in lesions treated with BSESs compared with lesions treated with DSESs. The major reason was BSES produced less toxicity to the arterial wall and facilitated neointimal healing as a result of polymer coating on DES surface biodegraded as time went by.

关键词： biodegradable polymers drug-eluting stents virtual histology intravascular ultrasound

Plasmonic tandem heterojunctions enable high-efficiency charge transfer for broad spectrum photocatalytic hydrogen production

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Journal of Energy Chemistry 2025年第1期100卷 710-720页

作者： Wenxuan Chen Xiu-Qing Qiao Guo Hui Bojing Sun dongfang Hou Meidi Wang Xueqian Wu Tao Wu dong-sheng Li College of Materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials China Three Gorges University Hubei Three Gorges Laboratory College of Chemistry and Materials Science and Guangdong Provincial Key Laboratory of Supramolecular Coordination Chemistry Jinan University

Rational engineering of semiconductor photocatalysts for efficient hydrogen production is of great significance but still challenging,primarily due to the limitations in charge transfer ***,a fascinating plasmonic tandem heterojunction with the hc-CdS/Mo2C@C heterostructure is aimfully prepared for effectively promoting the charge separation kinetics of the CdS photocatalyst via the synergistic strategy of phase junction,Schottky junction,and photothermal *** difference in atomic configuration between cubic-CdS （c-CdS） and hexagonal-CdS （h-CdS） leads to effective charge separation through a typical Ⅱ charge transfer mechanism,and plasmonic Schottky junction further extracts the electrons in the hc-CdS phase junction to realize gradient charge ***,the photothermal effect of Mo2C@C helps to expand the light absorption,accelerate charge transfer kinetics,and reduce the hydrogen evolution energy *** carbon layer provides a fast channel for charge transfer and protects the photocatalyst from *** a result,the optimized hc-CMC photocatalyst exhibits a significantly high photocatalytic H2production activity of 28.63 mmol/g/h and apparent quantum efficiency of 61.8%,surpassing most of the reported *** study provides a feasible strategy to enhance the charge transfer kinetics and photocatalytic activity of CdS by constructing plasmonic tandem heterogeneous junctions.

关键词： Heterojunctions LSPR Photocatalyst Phase junction Schottky junction Photothermal effect

预嵌锂用穿孔集流体对锂离子电容器电化学性能的影响

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物理化学学报 2017年第4期33卷 780-786页

作者：蒋江民聂平董升阳吴宇婷张校刚南京航空航天大学材料科学与技术学院江苏省能量转换材料与技术重点实验室南京210016

将石墨涂覆于传统铜箔(CCC)与穿孔铜箔(PCC)集流体表面,通过内部短路的方式进行预嵌锂处理,再以商业化的活性炭及预锂化的石墨分别为正、负极材料组装成锂离子电容器(LIC)。以PCC为集流体的LIC在0.1和2.0 A?g^(-1)的电流密度下,能量密... 详细信息

将石墨涂覆于传统铜箔(CCC)与穿孔铜箔(PCC)集流体表面,通过内部短路的方式进行预嵌锂处理,再以商业化的活性炭及预锂化的石墨分别为正、负极材料组装成锂离子电容器(LIC)。以PCC为集流体的LIC在0.1和2.0 A?g^(-1)的电流密度下,能量密度分别为118.2和51.7 Wh?kg^(-1),并且在0.5 A?g^(-1)的电流密度下循环1000次后的能量密度保持率为90%;以CCC为集流体的LIC在0.1和2.0 A?g^(-1)的电流密度下的能量密度分别为125.5和43.3 Wh?kg^(-1),在同等电流密度下2.0-3.8 V之间循环1000次后的能量密度保持率仅为73.2%。进一步研究表明,石墨采用PCC在预嵌锂的过程中避免了金属锂沉积,生成了均一且稳定的固体电解质膜(SEI),有效防止充放电过程中SEI膨胀,活性物质与集流体间粘结力降低,活性物质脱落等现象发生。因此,LIC通过PCC完成预嵌锂后的自放电及内阻更小,具有更佳的倍率性能和循环性能。

关键词：理离子电容器穿孔铜箔预嵌锂固体电解质膜集流体