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Heterogeneous information phase space reconstruction and stability prediction of filling body–surrounding rock combination

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International Journal of Minerals,Metallurgy and Materials 2024年第7期31卷 1500-1511页

作者： Dapeng Chen Shenghua Yin Weiguo Long rongfu Yan Yufei Zhang Zepeng Yan Leiming wang Wei Chen School of Civil and Resources Engineering University of Science and Technology of BeijingBeijing 100083China Production Technology Department Longshou MineJinchuan Group Co.Ltd.Jinchang 737100China School of Civil Engineering and Architecture East China Jiaotong UniversityNanchang 330013China

Traditional research believes that the filling body can effectively control stress concentration while ignoring the problems of unknown stability and the complex and changeable stress distribution of the filling body–surrounding rock combination under high-stress *** monitoring data processing methods cannot fully consider the complexity of monitoring objects,the diversity of monitoring methods,and the dynamics of monitoring *** solve this problem,this paper proposes a phase space reconstruction and stability prediction method to process heterogeneous information of backfill–surrounding rock *** three-dimensional monitoring system of a large-area filling body–surrounding rock combination in Longshou Mine was constructed by using drilling stress,multipoint displacement meter,and *** information,such as the stress and displacement of the filling body–surrounding rock combination,was continuously *** with the average mutual information method and the false nearest neighbor point method,the phase space of the heterogeneous information of the filling body–surrounding rock combination was then *** this paper,the distance between the phase point and its nearest point was used as the index evaluation distance to evaluate the stability of the filling body–surrounding rock *** evaluated distances(ED)revealed a high sensitivity to the stability of the filling body–surrounding rock *** new method was then applied to calculate the time series of historically ED for 12 measuring points located at Longshou *** moments of mutation in these time series were at least 3 months ahead of the roadway return *** the ED prediction experiments,the autoregressive integrated moving average model showed a higher prediction accuracy than the deep learning models(long short-term memory and Transformer).Furthermore,the root-mean-square error distribution of the prediction results peaked at 0

关键词： deep mining filling body–surrounding rock combination phase space reconstruction multiple time series stability prediction

Deep Tectonic Processes and Superaccumulation of Metals Related to Granitoids in the Nanling MetaUogenic Province,China

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Acta Geologica Sinica(English Edition) 1999年第2期73卷 181-192页

作者： PEI rongfu, wang Ping’an, and PENG Cong Institute of Mineral Deposits, CAGS, 26 Baiwanzhuang Rd., Beijing 100037 Institute of Geomechanics, CAGS, Beijing 100081 CAGS Inst Mineral Depositis Beijing 100037 Peoples R China CAGS Inst Geomech Beijing 100081 Peoples R China

The Nanling region is an important nonferrous and rare metal metallogenic province in South China, in which most of the deposits are related to granitoids in genesis. It covers southern Hunan, southern Jiangxi, Guangxi, Guangdong and Fujian provinces, with a total area of about 550,000 km2. This metallogenic province is well known in the world for its rich tungsten and tin resources. In the past 40-odd years, a vast amount of mineral exploration activities and studies of the geology of mineral deposits have been carried out and great achievements obtained in the province. This paper is focused on a discussion about the deep tectonic processes in the orogenic belt during the Mesozoic and their contribution to the superaccumulation of metals. Tectonically, this metallogenic province is composed of three units: (1) the marginal continental orogenic belt in the Southeastern Coast fold system in the Yanshanian; (2) the intercontinental orogenic belt in the collision suture belt between the Yangtze and Cathay-sian plates mainly in the Caledonian; and (3) the intracontinental orogenic belt induced by subduction of the ocean crust and delimination of the mantle lithosphere in the Yanshanian. It is suggested that superaccumulation of metals in this metallogenic province was caused by the existence of mantle rooted tectonics at the depth based on comprehensive studies of geophysical information of seismic, geothermal and magnetotelluric surveys in Nanling and its adjacent areas. The Xihuashan wolframite quartz vein deposit, the Shizhuyuan W, Sn, Mo, Bi greisen-skarn deposit and the Dachang tin-polymetallic deposit are three typical examples of the deep tectonic processes. However, this kind of deep tectonic processes only act as the 'engine' of the superaccumulation of metals, which means that they should have to correspond with the super-crust ore-controlling pattern of 'lines-rows-clusters' (L-R-C). This recog-nization is expected to play an important role in assessment of

关键词： deep tectonic process superaccumulation of metals Nanling China

Space truss construction modeling based on on-orbit assembly motion feature

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Chinese Journal of Aeronautics 2024年第3期37卷 365-379页

作者： Changjie ZHAO Weizhong GUO Meng CHEN Jiaxing HU Youcheng HAN rongfu LIN State Key Lab of Mechanical System and Vibration Shanghai Jiao Tong UniversityShanghai 200240China Institute of Aerospace System Engineering Shanghai Shanghai 201109China

More space truss construction has been planned to develop and utilize space *** trusses are designed in the way of large-scale,complex,modular,and on-orbit *** meet the upcoming challenge of large-scale space infrastructure construction,it is necessary to study space truss automation design and robotic *** paper proposes an ordinal finite screw adjacency matrix model(OFSAMM),focusing on the relationship between assembly motions,to express and compute a space truss *** this model,a space truss is abstracted as a set of ordered assembly motions,each of which is recorded as a finite screw as the basic element of the truss and its *** operation of truss transformation is also derived under this ***,the truss configuration,the assembly sequence,the truss sub-assembly,the truss components,and the on-orbit assembly task can be expressed and calculated in a unified model,which is calculated and stores the truss topology and assembly with the minimum storage *** the end of this paper,we introduce how to synthesize and optimize space truss design through two *** study will help to improve design ***,it provides a theoretical basis for the automatic construction of space truss structures,especially in the next stage.

关键词： Adjacency matrix Finite screw On-orbit construction modeling Space applications Space trusses Topology design

Integrated Frequency-constrained Scheduling Considering Coordination of Frequency Regulation Capabilities from Multi-source Converters

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Journal of Modern Power Systems and Clean Energy 2024年第1期12卷 261-274页

作者： Jiaming Li Ying Qiao Zongxiang Lu Wei Ma Xin Cao rongfu Sun the Department of Electrical Engineering Tsinghua UniversityBeijing 100084China the China Suntien Green Energy Limited Company Shijiazhuang 050011China the State Grid Jibei Electric Power Company Beijing 100054China

As the proportion of renewable energy(RE)increases,the inertia and the primary frequency regulation(FR)capability of the power system ***,ensuring frequency security in the scheduling model has become a new technical requirement in power systems with a high share of *** to a shortage of conventional synchronous generators,the frequency support of multi-source converters has become an indispensable part of the system frequency resources,especially variable-speed wind turbine generation(WTG)and battery energy storage(BES).Quantitative expression of the FR capability of multi-source converters is necessary to construct frequency-constrained scheduling ***,the frequency support performance of these converter-interfaced devices is related to their working states,operation modes,and parameters,and the complex coupling of these factors has not been fully exploited in existing *** this study,we propose an integrated frequency-constrained scheduling model considering the coordination of FR capabilities from multi-source *** FR control strategies and variable FR parameters for WTG with or without reserved power are modeled,and multi-target allocation of BES capacity between tracking dispatch instruction and emergency FR is ***,the variable FR capabilities of WTG and BES are embedded into the integrated frequency-constrained scheduling *** nonlinear constraints for frequency security are precisely linearized through an improved iteration-based *** effectiveness of the proposed model is verified in a modified IEEE 24-bus standard *** results suggest that the coordinated participation of BES and WTG in FR can effectively reduce the cost of the scheduling model while meeting frequency security constraints.

关键词： Battery energy storage(BES) wind turbine generation(WTG) frequency regulation(FR) frequency security power system scheduling

No association between serum uric acid and outcome in acute ischemic stroke:A Systematic Review and Meta-analysis

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No association between serum uric acid and outcome in acute ...

Research Progress of miRNAs in Rice(Oryza sativa L.)under Biotic and Abiotic Stresses

中华医学会第十七次全国神经病学学术会议

作者： lin fan ying liu rongfu wang Jiangsu Taizhou People’s Hospital

11 studies from 10355 participants were included in the *** odds ratio of poor outcome was 0.97(95%CI 0.93-1.01,p=0.147)among the acute ischemic stroke patients.

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Agricultural Biotechnology 2016年第4期5卷 46-50页

作者： Yu LI Liquan WU rongfu wang Juan LI School of Resources and Environment Anhui Agricultural University School of Agronomy Anhui Agricultural University Biotechnology Center Anhui Agricultural University

Stresses are defined as a variety of environmental factors that pose adverse impacts on plant growth and survival. Rice is an important food crop, whose quality and yield may be affected by environmental stresses. MicroRNAs play an important role in response to stresses, which regulate gene expression at the post-transcription level by cleaving target mRNAs and inhibiting mRNA translation. This paper summarized the mechanism of action of miRNAs and introduced research progress of miRNAs in rice under biotic and abiotic stresses, which provided reference for revealing the functional role of rice miRNAs in stress resistance.

关键词： Rice miRNA Biotic/abiotic stresses

Coordination of distinctive pesticide adjuvants and atomization nozzles on droplet spectrum evolution for spatial drift reduction

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Chinese Journal of Chemical Engineering 2024年第2期66卷 250-262页

作者： Shidong Xue Jingkun Han Xi Xi Zhong Lan rongfu Wen Xuehu Ma State Key Laboratory of Fine Chemicals Liaoning Key Laboratory of Clean Utilization of Chemical ResourcesInstitute of Chemical EngineeringSchool of Chemical EngineeringDalian University of TechnologyDalian 16024China School of Fashion and Textiles The Hong Kong Polytechnic UniversityHong Kong 999077China China Tianchen Engineering Corporation Tianjin 300400China School of Energy and Power Engineering Dalian University of TechnologyDalian 116024China

Pesticide adjuvants,as crop protection products,have been widely used to reduce drift loss and improve utilization efficiency by regulating droplet ***,the coordinated regulation mechanisms of adjuvants and nozzles on droplet spectrum remain ***,we established the relationship between droplet spectrum evolution and liquid atomization by investigating the typical characteristics of droplet diameter distribution near the *** on this,the regulation mechanisms of distinctive pesticide adjuvants on droplet spectrum were clarified,and the corresponding drift reduction performances were quantitively evaluated by wind tunnel *** shows that the droplet diameter firstly shifts to the smaller due to the liquid sheet breakup and then prefers to increase caused by droplet *** the surface tension of sprayed liquid facilitates the uniform liquid breakup and increasing the viscosity inhibits the liquid deformation,which prolong the atomization process and effectively improve the droplet *** a result,the drift losses of flat-fan and hollow cone nozzles are reduced by about 50%after adding organosilicon and vegetable oil *** contrast,the air induction nozzle shows a superior anti-drift ability,regardless of distinctive *** findings provide insights into rational adjuvant design and nozzle selection in the field application.

关键词： Pesticide drift Spray droplets Particle size distribution Spray atomization Transport processes Adjuvants

Effects of radiation-induced suicide gene therapy under radiation of radionuclide 125I on human hepatocarcinoma cells in vitro

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Chinese Medical Journal 2014年第7期127卷 1385-1387页

作者： Li Ling Zhang Chunli Yan Ping Yin Lei Kang Lei Zhao Qian wang rongfu Key Laboratory of Nuclear Medicine Ministry of Health Jiangsu Key Laboratory of Molecular Nuclear Medicine Jiangsu Institute of Nuclear Medicine Wuxi Jiangsu 214063 China Department of Nuclear Medicine Peking University First HospitalBeijing 100034 China

There are few efficient therapeutic approaches to *** et al1 developed iodine （131I） metuximab injection （Licartin）,a novel 131I-labeled HAb18G/CD147-specific monoclonal antibody Fab＇2 ***18G/CD147 is a hepatocellular carcinoma-associated *** their results have no obvious improvements in survival rate of patients with ***：radiation effects; promoter regions, genetic lentivirus; cytosine deaminase; fluorocytosine; HepG2 cells

关键词： radiation effects promoter regions, genetic lentivirus cytosine deaminase fluorocytosine HepG2 cells

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骨与软组织肿瘤的核素诊治应用进展

中国肿瘤临床 2007年第19期34卷 1127-1130页

作者：王荣福方志伟北京大学第一医院核医学科北京市100034 天津医科大学附属肿瘤医院骨软组织肿瘤科

寻求新的骨与软组织肿瘤诊治方法是目前临床医学亟待解决问题。尽管近年来医学科学发展迅速,并取得了可喜的进展,但尚存在一定的局限性。随着核医学放射性核素示踪技术的发展和临床应用范围的不断拓宽,其在骨与软组织肿瘤中的临床应用... 详细信息

寻求新的骨与软组织肿瘤诊治方法是目前临床医学亟待解决问题。尽管近年来医学科学发展迅速,并取得了可喜的进展,但尚存在一定的局限性。随着核医学放射性核素示踪技术的发展和临床应用范围的不断拓宽,其在骨与软组织肿瘤中的临床应用日趋受到人们的重视。本文就目前核素诊治骨与软组织肿瘤的应用进展加以介绍。

关键词：骨与软组织肿瘤核医学放射性核素示踪