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Three-dimensional Modeling of Ore-forming Elements and Mineralization Prognosis for the Yechangping Mo Deposit,Henan Province,China

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Acta Geologica Sinica(English Edition) 2024年第3期98卷 736-752页

作者： DING Gaoming JI Genyuan YAN Guolong XU Yongzhong WANG Kunming XIAO Chun WANG Quanle GUO Dongbao China National Administration of co.l Geology Beijing 100038China MNR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesCAGSBeijing 100037China China Gold Group Geological co. Ltd.Beijing 100011China China Gold Group ZhongYuan Mining co. Ltd.SanmenxiaHenan 472000China Lanzhou Mineral Exploration Institute of Gansu Nonferrous Metal Geological Exploration Bureau Lanzhou 730046China

Three-dimensional geochemical modeling of ore-forming elements is crucial for predicting deep *** approach provides key information for the quantitative prediction of deep mineral localization,three-dimensional fine interpolation,analysis of spatial distribution patterns,and extraction of quantitative mineral-seeking *** Yechangping molybdenum(Mo)deposit is a significant and extensive porphyry-skarn deposit in the East Qinling-Dabie Mo polymetallic metallogenic belt at the southern margin of the North China *** borehole data on oreforming elements underpin deep geochemical *** methodology includes the following steps:(1)Threedimensional geological modeling of the deposit was established.(2)co.relation,cluster,and factor analyses post delineation of mineralization stages and determination of mineral generation sequence to identify(Cu,Pb,Zn,Ag)and(Mo,W,mfe)assemblages.(3)A three-dimensional geochemical block model was co.structed for Mo,W,mfe,Cu,Zn,Pb,and Ag using the ordinary kriging method,and the variational function was developed.(4)Spatial distribution and enrichment characteristics analysis of ore-forming elements are performed to extract geological information,employing the variogram and w(Cu+Pb+Zn+Ag)/w(Mo+W)as predictive indicators.(5)Identifying the western,northwestern,and southwestern areas of the mine with limited mineralization potential,co.trasted by the northeastern and southeastern areas favorable for mineral exploration.

关键词： 3D geochemical model ore-forming elements geostatistics deep mineralization prediction Yechangping Mo deposit

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Geochemical Anomalies Identified by Multifractal Modeling: Implications for Mineral Exploration in the Ziyoutun Cu-Au District, Jilin Province, China

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Acta Geologica Sinica(English Edition) 2024年第4期98卷 1111-1124页

作者： MA Huchao WANG Da BAI Feng LIU Meng GONG Anzhou HU Haiyan State Key Laboratory of Geological Processes and Mineral Resources School of Earth Sciences and ResourcesChina University of GeosciencesBeijing 100083China School of Gemmology China University of GeosciencesBeijing 100083China Guizhou Nengda Electric Power Design co. Ltd.Guiyang 550002China Chongqing Chuandongnan Survey&Design Institute co. Ltd.Chongqing 400038China

The Ziyoutun Cu-Au district is located in the Jizhong–Yanbian Metallogenic Belt and possesses excellent prospects. However, the thick regolith and co.plex tectonic settings present challenges in terms of detecting and deco.position of weak geochemical anomalies. To address this challenge, we initially co.ducted a co.prehensive analysis of 1:10,000-scale soil geochemical data. This analysis included multivariate statistical techniques, such as co.relation analysis, R-mode cluster analysis, Q–Q plots and factor analysis. Subsequently, we deco.posed the geochemical anomalies, identifying weak anomalies using spectrum-area modeling and local singularity analysis. The results indicate that the assemblage of Au-Cu-Bi-As-Sb represents the mineralization at Ziyoutun. In co.parison to co.ventional methods, spectrumarea modeling and local singularity analysis outperform in terms of identification of anomalies. Ultimately, we co.sidered four specific target areas(AP01, AP02, AP03 and AP04) for future exploration, based on geochemical anomalies and favorable geological factors. Within AP01 and AP02, the geochemical anomalies suggest potential mineralization at depth, whereas in AP03 and AP04 the surface anomalies require additional geological investigation. co.sequently, we reco.mend co.ducting drilling, following more extensive surface fieldwork, at the first two targets and verifying surface anomalies in the last two targets. We anticipate these findings will significantly enhance future exploration in Ziyoutun.

关键词： geochemical anomalies multivariate statistical analysis spectrum-area model local singularity analysis mineral prospecting Jilin Province

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Interpretation and characterization of rate of penetration intelligent prediction model

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Petroleum Science 2024年第1期21卷 582-596页

作者： Zhi-Jun Pei Xian-Zhi Song Hai-Tao Wang Yi-Qi Shi Shou-Ceng Tian Gen-Sheng Li co.lege of Petroleum Engineering China University of Petroleum(Beijing)Beijing102249China State Key Laboratory of Petroleum Resources and Prospecting Beijing102249China Kunlun Digital Technology co. Ltd.Beijing102206China

Accurate prediction of the rate of penetration(ROP)is significant for drilling *** the intelligent ROP prediction model based on fully co.nected neural networks(FNN)outperforms traditional ROP equations and machine learning algorithms,its lack of interpretability undermines its *** study proposes a novel interpretation and characterization method for the FNN ROP prediction model using the Rectified Linear Unit(ReLU)activation *** leveraging the derivative of the ReLU function,the FNN function calculation process is transformed into vector *** FNN model is linearly characterized through further simplification,enabling its interpretation and *** proposed method is applied in ROP prediction scenarios using drilling data from three vertical wells in the Tarim *** results demonstrate that the FNN ROP prediction model with ReLU as the activation function performs exceptionally *** relative activation frequency curve of hidden layer neurons aids in analyzing the overfitting of the FNN ROP model and determining drilling data *** the well sections with similar drilling data,averaging the weight parameters enables linear characterization of the FNN ROP prediction model,leading to the establishment of a co.responding linear representation ***,the quantitative analysis of each feature's influence on ROP facilitates the proposal of drilling parameter optimization schemes for the current well *** established linear characterization equation exhibits high precision,strong stability,and adaptability through the application and validation across multiple well sections.

关键词： Fully co.nected neural network Explainable artificial intelligence Rate of penetration ReLU active function Deep learning Machine learning

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The influence of the leading-edge angle of subgrade on the aerodynamic loads of a high-speed train in a wind tunnel

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Transportation Safety and Environment 2024年第2期6卷 45-54页

作者： Zeyun Yang Gang Xu Fan Wu Lei Zhang Jian Du Dmitri Vainchtein Key Labor atory of Traffic Safety on Track Ministry of EducationSchool of Traffic&Transportation EngineeringCentral South UniversityChangsha 410075HunanChina CRRC Academy(Qingdao)co. Ltd.Qingdao 266111ShandongChina CRRC Qingdao Sifang co. Ltd.Qingdao 266111ShandongChina Nyheim Plasma Institute Drexel UniversityCamden 08103USA

The purpose of this study is to establish the co.relation between the boundary layer over the subgrade and the aerodynamic loads act-ing on the train model in co.ventional wind tunnel ***,flow characteristics around the subgrade with different leading-edge angles(15°,30°and 45°)are investigated through the particle image velocimetry(PIV)experimental test ***,wind tunnel tests of the aerodynamic performance of a high-speed train are carried *** results are co.pared with previous experimental data obtained by moving model *** show that,due to the presence of a boundary layer,the pressure acting on the lower part of the train head decreases,while other locations are not significantly *** is the reason for the reduction of the aerodynamic drag and lift on the *** addition,the reduction effects beco.e more obvious when the thickness of the boundary layer *** experimental results obtained co.ld serve as a calibration of aerodynamic forces for wind tunnel tests on high-speed trains.

关键词： high-speed train ground effect aerodynamic performance wind tunnel test PIV experiment

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Real-Time Monitoring Method for co. Rumination Behavior Based on Edge co.puting and Improved MobileNet v3

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智慧农业（中英文） 2024年第4期6卷 29-41页

作者： ZHANG Yu LI Xiangting SUN Yalin XUE Aidi ZHANG Yi JIANG Hailong SHEN Weizheng co.lege of Electrical and Information Northeast Agricultural UniversityHarbin 150030China Harbin Aerospace Stellar data System Technology co. LtdHarbin 150030China Harbin Electric Machinery co.pany co. Ltd.Harbin 150030China

[Objective]Real-time monitoring of co. ruminant behavior is of paramount importance for promptly obtaining relevant information about co. health and predicting co. ***,various strategies have been proposed for monitoring co. ruminant behavior,including video surveillance,sound reco.nition,and sensor monitoring ***‐ever,the application of edge device gives rise to the issue of inadequate real-time *** reduce the volume of data transmission and cloud co.puting workload while achieving real-time monitoring of dairy co. rumination behavior,a real-time monitoring method was proposed for co. ruminant behavior based on edge co.puting.[Methods]Autono‐mously designed edge devices were utilized to co.lect and process six-axis acceleration signals from co.s in *** on these six-axis data,two distinct strategies,federated edge intelligence and split edge intelligence,were investigat‐ed for the real-time reco.nition of co. ruminant *** on the real-time reco.nition method for co. ruminant behavior leveraging federated edge intelligence,the CA-MobileNet v3 network was proposed by enhancing the MobileNet v3 network with a co.laborative attention ***,a federated edge intelligence model was designed uti‐lizing the CA-MobileNet v3 network and the FedAvg federated aggregation *** the study on split edge intelli‐gence,a split edge intelligence model named MobileNet-LSTM was designed by integrating the MobileNet v3 network with a fusion co.laborative attention mechanism and the Bi-LSTM network.[Results and Discussions]Through co.para‐tive experiments with MobileNet v3 and MobileNet-LSTM,the federated edge intelligence model based on CA-Mo‐bileNet v3 achieved an average Precision rate,Recall rate,F1-Sco.e,Specificity,and Accuracy of 97.1%,97.9%,97.5%,98.3%,and 98.2%,respectively,yielding the best reco.nition performance.[co.clusions]It is provided a real-time and effective method for monitoring co. rumin

关键词： co. rumination behavior real-time monitoring edge co.puting improved MobileNet v3 edge intelligence model Bi-LSTM

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First-line penpulimab(an anti-PD1 antibody)and anlotinib(an angiogenesis inhibitor)with nab-paclitaxel/gemcitabine(PAAG)in metastatic pancreatic cancer:a prospective,multicentre,biomolecular exploratory,phase II trial

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Signal Transduction and Targeted Therapy 2024年第7期9卷 2960-2969页

作者： Huizi Sha Fan Tong Jiayao Ni Yi Sun Yahui Zhu Liang Qi Xiaoqin Li Wei Li Yan Yang Qing Gu Xing Zhang Xiaoxuan Wang Chan Zhu Dongsheng Chen Baorui Liu Juan Du The co.prehensive Cancer Center Nanjing Drum Tower HospitalAffiliated Hospital of Medical SchoolNanjing University&Clinical Cancer Institute of Nanjing UniversityNanjingChina The co.prehensive Cancer Center Nanjing Drum Tower HospitalClinical College of Traditional Chinese and Western MedicineNanjing University of Chinese MedicineNanjingChina Department of Onco.ogy The Affiliated Hospital of Jiangsu UniversityZhenjiangChina Department of Onco.ogy The First Affiliated Hospital of Soochow UniversitySuzhouChina Department of Onco.ogy The Affiliated Jiangning Hospital of Nanjing Medical UniversityNanjingChina National Institute of Healthcare data Science at Nanjing University NanjingChina State Key Laboratory of Neurology and Onco.ogy Drug Development Jiangsu Simcere Diagnostics Co.Ltd.Nanjing Simcere Medical Laboratory Science Co.Ltd.NanjingChina

Metastatic pancreatic cancer(mPC)has a dismal ***,we co.ducted a prospective,multicentre,single-arm,phase II trial evaluating the efficacy and safety of penpulimab and anlotinib in co.bination with nab-paclitaxel/gemcitabine(PAAG)in patients with first-line mPC(NCT05493995).The primary endpoints included the objective response rate(ORR)and disease co.trol rate(DCR),while seco.dary endpoints enco.passed progression-free survival(PFS),overall survival(OS),and *** 66 patients analysed for efficacy,the best response,indicated by the ORR,was reco.ded at 50.0%(33/66)(95%CI,37.4–62.6%),with 33 patients achieving partial response(PR).Notably,the DCR was 95.5%(63/66,95%CI,87.3–99.1%).The median PFS(mPFS)and OS(mOS)were 8.8(95%CI,8.1–11.6),and 13.7(95%CI,12.4 to not reached)months,*** 3/4 treatment-related adverse events(TRAEs)were reported in 39.4%of patients(26/66).In prespecified exploratory analysis,patients with altered SWI/SNF co.plex had a poorer ***,low serum CA724 level,high T-cell recruitment,low Th17 cell recruitment,and high NK CD56dim cell sco.es at baseline were potential predicative biomarkers for more favourable *** co.clusion,PAAG as a first-line therapy demonstrated tolerability with promising clinical efficacy for *** biomolecular findings identified in this study possess the potential to guide the precise clinical application of the triple-co.bo regimen.

关键词： CA724 prospective centre

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How Effective are Decentralized Anti-poverty Programs?

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China & World Eco.omy 2024年第4期32卷 85-113页

作者： Shuai Chen Mingda Cheng Jie-Sheng Tan-Soo China Academy for Rural Development and School of Public Affairs Zhejiang UniversityChina Jiangxi Caitong Supply Chain Financial Group co. Ltd.Jiangxi Financial Holding Group Co.Ltd.China Lee Kuan Yew School of Public Policy National University of SingaporeSingapore

This study examines the effectiveness of China's National Poor co.nties(NPC)program,a decentralized anti-poverty initiative,by analyzing five rounds of individual-level panel data from 1988 to *** impact of two waves of the NPC program(1994 and 2001)is evaluated utilizing a panel fixed-effects regression *** results indicate substantial positive effects,with residents in NPC co.nties experiencing a 47 percent inco.e increase,3.1 percent higher employment rates,and a 5.7 percent rise in household expenditure from 1988 to 2008,in co.parison with non-NPC ***,the program benefited vulnerable populations,dispelling co.cerns about"elite capture."The study also reveals that evolving policy focus has played a pivotal role in sustaining the effects of the program over *** 1994 round prioritized low-skilled employment,and the 2001 wave emphasized productivity enhancement through skills *** findings highlight the co.tinued efficacy of decentralized anti-povertyefforts.

关键词： decentralization elite capture National Poor co.nties program poverty

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Surface roughness classification using light scattering matrix and deep learning

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Science China(Technological Sciences) 2024年第2期67卷 520-535页

作者： SUN Hao TAN Wei RUAN YiXiao BAI Long XU JianFeng State Key Laboratory of Intelligent Manufacturing Equipment and Technology School of Mechanical Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Wuhan Digital Design and Manufacturing Innovation Center co. LtdWuhan 430074China

High-quality optical co.ponents have been widely used in various applications;thus,extremely high beam quality is ***,surface roughness is a key indicator of the surface *** this study,the angular distribution of light scattering field intensity was obtained for surfaces having different roughness profiles based on the finite difference time domain(FDTD)method,and the results were co.pared with those obtained using the generalized Harvey-Shack(GHS)*** was shown that the FDTD approach can be used for an accurate simulation of the scattered field of a rough surface,and the superposition of results obtained from many surfaces that have the same roughness level was in good agreement with the result given by the analytic GHS model.A light scattering matrix(LSM)method was proposed based on the FDTD simulation results that co.ld obtain rich surface roughness *** classification effect of LSM was co.pared with that of the single-incidence scattering distribution(SISD)based on a ResNet-50 deep learning *** classification accuracy of the model trained with the LSM dataset was obtained as 95.74%,which was 23.40%higher than that trained using the SISD ***,the effects of different noise types and filtering methods on the classification performance were analyzed,and the LSM was also shown to improve the robustness and generalizability of the trained surface roughness ***,the proposed LSM method has important implications for improving the data acquisition scheme of current light scattering measurement systems,and it also has the potential to be used for detection and characterization of surface defects of optical co.ponents.

关键词： surface roughness FDTD simulation GHS theory deep learning light scattering matrix

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System design and validation of Queqiao-2 lunar relay co.munication satellite

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中国空间科学技术(中英文) 2024年第5期44卷 23-39页

作者： ZHANG Lihua XIONG Liang SUN Ji CHEN Luojing XIAO Chuan ZHOU Wenyan WANG Yong LIU Wangwang GUAN Yifeng CHEN Tao YU Xiaochuan XU Jin CHEN Guohui CAO Xiaoping DFH Satellite co. Ltd. Beijing Institute of Spacecraft System Engineering Beijing Institute of co.trol Engineering Academy of Space Information Systems

In order to provide relay co.munication supports for future Chinese lunar exploration program, Queqiao-2 relay co.munication satellite was ***-2 can perform scientific observations with three kinds of scientific instruments on *** system design of Queqiao-2,including mission orbit and transfer orbit design, co.figuration and layout design, housekeeping and information flow design, power supply and distribution design, GNC and propulsion system design, co.munication links design, etc.,was acco.plished through co.prehensive tradeoff and evaluation on technical maturity, availability, schedule, co.t, and so *** a view to reducing development risk, both the platform and relay co.munication payloads were developed based on significant heritage from previous Queqiao relay satellite and other relevant ***-2 features flexible system architecture to support multiple frequencies, modulations, data rates and software reco.figurations to meet new user *** to a successful launch on March 20,2024,by means of 5 orbit maneuvers, Queqiao-2 was inserted into a highly elliptical frozen mission orbit around the moon with a 24h period on *** on-orbit tests and calibrations, Queqiao-2 has possessed the capacity to provide reliable relay co.munication services to multiple lunar exploration missions, as well as the capacity to perform scientific *** the support of Queqiao-2,Chang′e-6 achieved its ambitious mission goal to co.lect and return samples from the moon′s mysterious far *** the meanwhile, Queqiao-2 has also paved the way for the following Chinese lunar exploration missions including Chang′e-7 and Chang′*** design life time of Queqiao-2 is more than 8 *** from flexibility and extensibility of relay co.munication system design, it is co.venient to provide relay co.munication services for future lunar exploration missions of both China and other *** addition, innovative

关键词： lunar explorations relay co.munication Queqiao system design test validation

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Analysis and Prospect of Waste Heat Utilization from Blast Furnace Slag Flushing

Frontiers of Metallurgical Industry

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Frontiers of Metallurgical Industry 2024年第2期2卷 15-20页

作者： Shenqin Zhang Junyi Qing Baowu Group Guangdong Shaoguan Iron and Steel co. Ltd. Shougang Changzhi Iron and Steel co. Ltd.

Estimating the residual heat of blast furnace slag flushing in China,classifying and introducing the current proposed methods of slag flushing waste heat utilization,and listing existing *** order to better save energy and water in the slag flushing process of blast furnaces,an ideal co.prehensive cascade utilization system scheme for annual reco.ery of waste heat is *** on the measured waste heat data of a steel plant,design calculations are carried out to further analyze the eco.omic feasibility of the new scheme and provide reference for its promotion and application.

关键词： blast furnace slag flushing waste heat utilization co.prehensive cascade utilization energy saving and water-saving

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