检索结果-内蒙古大学图书馆

Reservoir recovery study with stability analysis model constructed by water-driven oil flat sand filling experiment: example of well area X in Tankou oilfield, China

引用

Arabian Journal of Geosciences 2024年第8期17卷 1-18页

作者： Yang, Yuan Liang, Bo Exploration and Development Research Institute Jianghan Oilfield Company Sinopec China Key Laboratory of Oil and Gas Resources and Exploration Technology Ministry of Education School of Petroleum Engineering Yangtze University Wuhan China School of Aviation and Transportation Jiangsu College of Engineering and Technology Nantong China

The study of the law and degree of injection and extraction coupling in old oil areas is a difficult point that affects the recovery rate. The traditional experimental and numerical simulation research methods lack validation and working condition prediction. This study has improved the working steps and supplemented the lack of program validation link through the methods of data prediction and mathematical argumentation. This program has been implemented in the Tamkou field. In addition, we determined the relationship between different permeability, crude oil viscosity, and recovery rate influencing factors on recovery under the premise of a fixed well network, and the DGM (1,1) model prediction yielded the recovery rates of 8.93 and 12.08 for the next 2 time nodes. The analyses showed that adopting the means of water blending and dosing to adjust the crude oil viscosity to 90 mPa s, and adopting the water injection rate of 5 mL/min to extract the best recovery rate. Min water injection rate is optimal for extraction.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Mining Better Samples and Semantic Consistency for Contrast Learning in Forest Semantic Segmentation 41

Mining Better Samples and Semantic Consistency for Contrast ...

引用

第41届中国控制会议

作者： Chongjin Chen Yichao Cao Qingfei Tang Xiaobo Lu School of Software Southeast University Key Laboratory of Measurement and Control of Complex Systems of Engineering Ministry of Education School of Automation Southeast University Nanjing Enbo Technology Co. Ltd.

ISBN: (数字)9789887581536

ISBN: (纸本)9781665482561

Image segmentation has impressive progress in the past several *** good segmentation usually follows pixelwise well-annotated labels which is ***,the robustness would not be guaranteed due to lack-ofdiversity *** work usually focuses on pixels individually and pay less attention to the neighbor *** local context would be scarce and the global context is not utilized following these *** proposal a method,named Forest Semantic Segmentation Network(FSSNet) to address these *** organizes original version and augmented version of images,as two inputs into student branch and teacher branch,and force the two outputs being consistent to strengthen the robustness of our ***,we not only consider pixel itself and also the neighbor pixels because the context of neighbor pixels helps understanding the *** utilizes contrastive loss with memory bank to involve global context in training which will make pixels closer to others in same category and far away from pixels of different categories.A bank filter is suggested to improve the quality of features in the memory *** also proposal a new sample strategy to improve the effect of contrastive loss and reduce the *** method can improve accuracy and strengthen the robustness with affordable extra computation during training process,and no additional computation during inference toward *** to benchmark,the proposed approach can improve the mIoU by 3.1% on our challenging dataset.

关键词： Semantic segmentation Contrastive learning Deep learning

来源：评论

学校读者我要写书评

暂无评论

Garnet U-Pb dating of the Qingshuitang wollastonite deposit， Guposhan ore district， Nanling Range: Implications for the timing of mineralization and ore genesis

引用

Journal of Earth Science 2025年

作者： Zhuang Duan Lujun Lin Jianguo Li Qiwei Feng Yong Li Zenghui Zhou Siyuan Li Jingjing Gong Jianzhou Yang Chunjia Li Wenlong Liu Fan Yang State Key Laboratory of Deep Earth and Mineral Exploration， Institute of Geophysical and Geochemical Exploration， Chinese Academy of Geological Sciences Key Laboratory for Geochemical Exploration Technology， Ministry of Natural Resources Shandong Engineering Research Center of High-Grade Iron Deposits Exploration and Exploitation Zhengzhou Institute of Multipurpose Utilization of Mineral Resource， Chinese Academy of Geological Sciences NO.1 Geological Team of Shandong Provincial Bureau of Geology and Mineral Resources Guangxi Transportation Science and Technology Group Co.， Ltd. Tianjin Center，China Geological Survey

The Guposhan ore district， located in the southwestern Nanling Range of South China， is characterized by its large-scale Yanshanian granitic batholith and significant Sn (W) mineralization， with a number of medium to large scale skarn-， and quartz vein-type Sn-W deposits. However， the geology and genesis of wollastonite mineralization in the Guposhan ore district and its relationship to the multi-stage granitic magmatism and associated Sn-W mineralization remain poorly understood. The absence of precise age constraints for wollastonite deposit impedes recognition of the key factors contributing to this non-metallic mineralization. In this study， we present LA-ICPMS U-Pb dating and trace element analysis of garnets from Qingshuitang wollastonite deposit in the southern Guposhan ore district. The garnets from high-grade (QST-4) and skarn-type low-grade (QST-5) wollastonite ores both belong to the andradite-grossular series， and yield lower intercept ages of 166.8±2.0 Ma and 165.9±2.1 Ma， with U contents of 2.89-3.26 ppm and 3.04-3.60 ppm， respectively. These ages are directly linked with the formation of skarn assemblages， and can be interpreted as the age of Qingshuitang wollastonite mineralization， which are consistent with the major peak magmatism and Sn-W mineralization (ca. 165～160 Ma) of the Guposhan district. Combined with geological features of the Qingshuitang deposit， we propose that the critical factors controlling the formation of wollastonite mineralization through thermal contact metamorphism are the large volumes of Lower Carboniferous limestone intercalated with chert nodules and bands serving as source rocks， and being almost parallel to the Guposhan intrusion-wallrock interface， as well as the substantial and abundant heat input caused by the large scale Guposhan granite. Besides， our study suggests that LA-ICP-MS U-Pb geochronology has the potential for significantly broader applications in dating non-metallic mineralization than its current utiliza

关键词：

来源：评论

学校读者我要写书评

暂无评论

PM2.5-O3 Compound Pollution Pattern Recognition Based on Hybrid Model of tensor Decomposition and Spectral Clustering 3

PM2.5-O3 Compound Pollution Pattern Recognition Based on Hyb...

引用

3rd International Conference on Digital Society and Intelligent Systems, DSInS 2023

作者： Li, Wanhua Hu, Dongmei Guo, Yafei Dong, Jiaqi The North China Electric Power University MOE Key Laboratory of Resources and Environmental System Optimization College of Environmental Science and Engineering Beijing10044 China Beijing Jiaotong University Engineering Research Center of Clean and Low-carbon Technology for Intelligent Transportation Ministry of Education School of Environment Beijing10044 China

ISBN: (纸本)9798350331387

para>Clustering intra-urban areas with the same pollution characteristics can help to accurately manage intra-urban air pollution. In this study, a new classification model for PM2.5-O3 composite pollution features is established based on tensor decomposition and spectral clustering methods. The tensor decomposition was utilized to extract pollution features from massive air pollutant concentration data, and the pollution concentration data were decomposed into day-by-day, intra-day, and spatial modes, which provided a low-dimensional space for the subsequent spectral clustering and fine clustering classification process of the urban spatial-scale PM2.5-O3 composite pollution conditions. The model is explored by taking the annual PM2.5 and O3 pollution conditions in Beijing in 2017 and 2020 as an example, discussing the differences in geographic locations and pollution characteristics between the different models, and explaining the changes in the city's pollution characteristics from 2017 to 2020. Through this new hybrid method, scientific support can be provided for urban refinement and precise management. © 2023 IEEE.

关键词： Pattern recognition

来源：评论

学校读者我要写书评

暂无评论

Research on Teaching Mode and Platform Construction of Intelligent Manufacturing Practical Training Based on Digital Twins Under the Background of New engineering

Research on Teaching Mode and Platform Construction of Intel...

引用

International Conference on Educational and Information technology (ICEIT)

作者： Jianhua Cao Zhigang Jiang Wei Hu Xuhui Xia Xiang Liu Xiaoqin Liu Xiong Bao Engineering Training Center Wuhan University of Science and Technology Wuhan China Key Laboratory of Metallurgical Equipment and Control Technology Wuhan University of Science and Technology Wuhan China

ISBN: (数字)9798350372663

ISBN: (纸本)9798350372670

Aiming at the issues of high risks, high costs, and low efficiency in the training and teaching process of intelligent manufacturing, which seriously affect the quality of talent cultivation in intelligent manufacturing. By adopting digital twin technology, the intelligent manufacturing production line is mapped to virtual space, and a two-stage practical training teaching model that integrates virtual space simulation operations and physical space actual operations is constructed. And an intelligent manufacturing digital twin teaching platform was established to support the teaching model. The safe, efficient and economical operation of intelligent manufacturing practical training and teaching has been achieved.

关键词： Training Costs Welding transportation Production Real-time systems Manufacturing

来源：评论

学校读者我要写书评

暂无评论

Performance analysis of diffusion-based decode-and-forward relay with depleted molecule shift keying

引用

Digital Communications and Networks 2021年第3期7卷 399-409页

作者： Jiaxing Wang Mugen Peng Yaqiong Liu State Key Laboratory of Networking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing100876China School of Electronic and Control Engineering North China Institute of Aerospace Engineering.Langfang Aerospace Testing Technology and Instrument Research and Development CenterLangfang065000China

The distance-decay effect of molecular signals makes communication range a major challenge for diffusion-based Molecular Communication(MC).To solve this problem,the intermediate nano-machine is deployed as a relay between the transmitter and its intended receiver *** this work,we employ the Depleted Molecule Shift keying(D-MoSK)to model a Decode-and-Forward(DF)relay communication *** closed-form expression of Bit Error Rate(BER)for the concerned DF relay with D-MoSK is ***,the maximum a posteriori probability,minimum error probability,and maximum likelihood schemes are formulated for data *** relationships between BER and other key parameters,including the number of released molecules,receiving radius,and relay position,are investigated in *** results show that the proposed scheme can improve communication reliability ***,the performance gain can be maximized by optimizing the position of the relay and the receiving radius.

关键词： Diffusion Molecular communication Decode-and-Forward relay Bit error rate

来源：评论

学校读者我要写书评

暂无评论

Machine Learning-based Prediction of Maximum Inundation Depth and Maximum Inundation Flow Rate for Flooding 5

Machine Learning-based Prediction of Maximum Inundation Dept...

引用

5th International Conference on Computer, Big Data and Artificial Intelligence, ICCBD+AI 2024

作者： Tian, Tian Jiang, Lexin Zhang, Zongjia Yang, Lili Cheng, Xiangju South China University of Technology School of Civil Engineering and Transportation Guangzhou China Jiujiang Vocational University of Civil Engineering and Architecture Jiujiang China Jinan University School of Public Administration & Emergency Management Guangzhou China Southern University of Science and Technology SUSTech Academy of Finance and Economics Shenzhen China Southern University of Science and Technology Department of Statistics and Data Science Shenzhen China South China University of Technology State Key Laboratory of Subtropical Building and Urban Science Guangzhou China

ISBN: (纸本)9798331533991

In this paper, taking Yangshuo County, which is frequently affected by mountain floods and Lijiang River transit floods together, as an example, we utilize the high-precision flood data generated by the coupled hydrological-hydrodynamic models in a machine learning sample library and construct the maximum inundation water depth prediction model (KNN-Depth) and the maximum inundation flow rate prediction model (KNN-Speed) based on the machine learning K-nearest-neighbor algorithm (KNN) to predict the maximum inundation water depth and maximum inundation flow rate. The prediction performance of the models has been tested and examined with 17 data sets of historical floods, in which a total of six flood risk classes have been classified to carry out flood risk prediction in the study area by considering the two indicators of maximum inundation water depth and maximum inundation flow rate. The results show that: 1) The maximum inundation water depth predicted by KNN-Depth is close to the simulation results of the maximum inundation water depth of the hydrodynamic model, and the mean values of the Coefficients of Determination (R2), Root Mean Square Error (RMSE), and Mean Absolute Error (MAE) indexes of the 17 floods are 0.988, 0.127m, and 0.060m, respectively;2) The maximum inundation flow velocity generated by KNN-Speed model is similar to the simulation results of the maximum inundation flow velocity of the hydrodynamic model, and the mean values of R2, RMSE and MAE indicators of the 17 floods are 0.968, 0.051m/s and 0.020m/s, respectively;3) The running time of KNN-Depth and KNN-Speed models is 2s and 10s, respectively for the prediction;4) The research indicates that the flood risk in Yangshuo County within 500m of the banks of the main rivers during a large flood is level 6 in general, and the flood risk in the new and old urban areas is up to level 5. © 2024 IEEE.

关键词： Nearest neighbor search

来源：评论

学校读者我要写书评

暂无评论

Electrical resistivity-temperature characteristics enhancement of insulating cross-linked polyethylene composites by incorporating positive temperature coefficient particles with different Curie temperatures

引用

High Voltage 2023年第1期8卷 1-11页

作者： Guimin Jiang Yuanxiang Zhou Chenyuan Teng Yunxiao Zhang Xin Huang Lei Xue Luming Zhou The Wind Solar Storage Division of State Key Laboratory of Control and Simulation of Power System and Generation Equipment Xinjiang UniversityUrumqiChina State Key Laboratory of Power System and Generation Equipment Department of Electrical EngineeringTsinghua UniversityBeijingChina College of Information Engineering Zhejiang University of TechnologyHangzhouChina School of Electronics and Computer Science University of SouthamptonSouthamptonUK

Incorporating positive temperature coefficient(PTC)ceramic particles into polymers provides a prospective alternative solution for suppressing severe electric field distortions caused by negative temperature coefficient(NTC)of electrical resistivity within polymer insulation in high voltage direct current *** effect of the Curie temperature of PTC particles on the inhibition of the NTC effect of cross-linked polyethylene(XLPE)is investigated in this *** temperature coefficient particles with varied Curie temperatures are surface-modified and melt blending with *** modified particles are dispersed on averagely in the *** electrical resistivity,space charge behaviour,and direct current(DC)electrical breakdown strength of the samples are investigated at different temperatures,exploring the effect of the Curie temperature of PTC particles on suppressing the NTC effect of *** is demonstrated that the reduction in Curie temperature can further suppress the NTC effect of XLPE,enhance the DC strength at elevated temperatures,and inhibit the internal space charge *** reduction in the Curie temperatures means that the initiation of the PTC effect advances,exhibiting a higher potential barrier and inhibiting the NTC effect more *** work may give a reference for improving the temperature stability of DC properties for XLPE cable insulation.

关键词： coefficient resistivity insulation

来源：评论

学校读者我要写书评

暂无评论

Thermal shock resistance and enhanced adhesion of ITO film on organic substrate through introducing a transparent SiO2-PMMA buffer layer 5

Thermal shock resistance and enhanced adhesion of ITO film o...

引用

5th International Conference on Optoelectronic Science and Materials, ICOSM 2023

作者： Chen, Qiuli Fang, Fengxu Gong, Tao Chen, Wangchang Liu, Donghua Liu, Tao National Engineering Research Center of Electromagnetic Radiation Control Materials University of Electronic Science and Technology of China Chengdu611731 China Key Laboratory of Multi-spectral Absorbing Materials and Structures of Ministry of Education University of Electronic Science and Technology of China Chengdu611731 China School of Materials and Energy University of Electronic Science and Technology of China Chengdu610054 China

ISBN: (纸本)9781510674547

Transparent conductive films (TCFs) are widely used as electrodes in flexible optoelectronic devices, which have very strong potential applications in a lot of fields. Currently, one of the most intensively studied subject in this community is developing transparent organic buffer layer with both low thermal expansion coefficient and strong interfacial bonding energy with TCFs, so as to enhance their resistibility against thermal expansion during device working. This is particularly important for the ceramic type TCFs, such as indium tin oxide (ITO), because their thermal expansion coefficients are almost two orders of magnitude lower than that of flexible organic substrates. In this work, we have successfully developed a new highly transparent SiO2-PMMA buffer layer with glass transition temperature of 119.6 ℃. Thermal shock tests reveal that a 100 nm thick ITO film grown on this SiO2-PMMA buffer layer can tolerate 10 cycles of temperature shock between -55 ℃ and 120 ℃. In addition, the interfacial adhesion between organic substrate and ITO film after thermal shock was greatly enhanced as well by introducing SiO2-PMMA buffer layer. Our work presents the possible for ITO films to achieve the good thermal shock resistance and robust adhesion to organic substrates simultaneously, and is expected to be widely used in flexible optoelectronic devices. © 2024 SPIE.

关键词： Silica

来源：评论

学校读者我要写书评

暂无评论

Impacts of strong El Ninon summertime near-surface ozone over China

引用

Atmospheric and Oceanic Science Letters 2022年第4期15卷 13-18页

作者： Mengyun Li Yang Yang Pinya Wang Dongsheng Ji Hong Liao Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment TechnologySchool of Environmental Science and EngineeringNanjing University of Information Science and TechnologyNanjingChina State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina

The influences of strong El Nino events(1997/98 and 2015/16)on summertime near-surface ozone(O_(3))concentrations over China are investigated using the GEOS-Chem *** results show that near-surface O_(3) concentrations increased by a maximum of 6 ppb(parts per billion)during the summer of the developing phase of the 1997/98 El Nino in northeastern China,mainly due to the increased chemical production related to the hot and dry ***,the O_(3) concentration increased by 3 ppb during the developing summer of both the 1997/98 and 2015/16 El Nino in southern *** was linked to the weakened prevailing monsoon winds,which led to the accumulation of O_(3) in southern *** contrast,in the summer of the decaying phase of the two El Nino events,O_(3) concentrations decreased over many regions of China when the El Nino reversed to the cooling *** highlights that El Nino plays an important role in modulating near-surface O_(3) concentrations over China.

关键词： El Nino Ozone GEOS-Chem

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：