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邻采邻掘动压巷道密集钻孔切顶卸压技术研究

矿业研究与开发 2024年第1期44卷 42-47页

作者：刘团张百胜郭俊庆崔俊彪刘涛禹太原理工大学矿业工程学院山西太原030024 太原理工大学原位改性采矿教育部重点实验室山西太原030024

为解决邻采邻掘巷道受强动压影响导致巷道维护困难的问题,采用理论分析、数值模拟与巷道现场变形实测的方法,对炭窑坪煤业100302回风巷密集钻孔切顶卸压技术进行了研究。研究结果表明:超前工作面巷道顶板布置密集钻孔后,工作面推进至附... 详细信息

为解决邻采邻掘巷道受强动压影响导致巷道维护困难的问题,采用理论分析、数值模拟与巷道现场变形实测的方法,对炭窑坪煤业100302回风巷密集钻孔切顶卸压技术进行了研究。研究结果表明:超前工作面巷道顶板布置密集钻孔后,工作面推进至附近时,回采来压使相邻钻孔塑性区贯穿形成定向弱带,工作面推过后,顶板沿定向弱带及时破断,可达到切顶卸压的目的;确定了密集钻孔切顶卸压的关键参数,并引入平均动载系数,优化了传统密集钻孔间距公式;密集钻孔切顶卸压后,邻采邻掘过程中煤柱应力峰值变化曲线整体降低,切顶时的波动峰值出现波动时间提前、波动范围缩小、波动峰值降低,降幅分别为22.1%、19.9%、19.1%。现场监测结果表明,密集钻孔切顶卸压后邻近工作面掘进巷道围岩处于可控范围内。

关键词：邻采邻掘强动压密集钻孔切顶卸压

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切顶条件下沿空留巷组合充填体合理参数研究

矿业研究与开发 2024年第6期44卷 34-41页

作者：刘涛禹张百胜郭俊庆刘团李泽天李恒忠太原理工大学矿业工程学院山西太原030024 太原理工大学原位改性采矿教育部重点实验室山西太原030024 山西国源煤层气综合利用工程技术股份有限公司山西太原030024

针对坚硬顶板切顶条件下组合充填体承载特征不清楚、参数选取较盲目的问题,以某煤矿的90203回风巷为研究对象,采用理论分析、数值模拟和现场试验等方法,研究切顶后不同充填体宽度和不同充填体上、下分层高度条件下的组合充填体受力特征... 详细信息

针对坚硬顶板切顶条件下组合充填体承载特征不清楚、参数选取较盲目的问题,以某煤矿的90203回风巷为研究对象,采用理论分析、数值模拟和现场试验等方法,研究切顶后不同充填体宽度和不同充填体上、下分层高度条件下的组合充填体受力特征和巷道围岩的变形规律。建立叠加层板模型,分析了切顶条件下充填体受力状态及变形量,给出了切顶后组合充填体合理参数的计算公式。结果表明:随着组合充填体上分层高度增加,充填体整体承载性能经历阶段性变化,其所承受的应力呈现先增加后减小的变化趋势;随着充填体宽度的增加,充填体对围岩适应能力发生改变,使得其所受应力呈现非线性减小的趋势。实践表明,90203工作面回采期间,沿空留巷组合充填体稳定,回风巷顶底板及两帮的最大位移量分别为307 mm和319 mm,均在可控范围之内。

关键词：切顶卸压组合充填体沿空留巷巷道控制

STUDY OF PHASES IN U-10wt%Zr ALLOY BY NEUTRON DIFFRACTION

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Acta Metallurgica Sinica(English Letters) 1995年第3期8卷 174-180页

作者： XIE Guoqiang YANG Jijian zhang baisheng LI Wendan(China Institute of Atomic Energy, Beijing) China Inst of Atomic Energy Beijing China

U 10wt%Zr alloy has been analysed by neutron diffraction method to determine the constituent phases and their crystal *** collected diffraction data are processed using Rietveld' s profile technique (with program“ Fullprof ”). Four phases,α-U,δ, γand α Zr, in the alloy at room temperature and the corresponding volume fractions as well their structural parameters are obtained from the data analysis, For the δ-phase, a partially ordered unusual hexagonal structure of the modified C32(AlB2) type is confirmed.

关键词： U-10wt%Zr alloy neutron diffraction δ-phase

多层坚硬顶板动压巷道矿压显现规律及深浅孔组合爆破切顶控制技术研究

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矿业研究与开发 2024年第9期44卷 48-55页

作者：任霄洋郭俊庆张百胜郗泽涛卢春生李恒忠太原理工大学原位改性采矿教育部重点实验室山西太原030024 太原理工大学矿业工程学院山西太原030024 山西转型综合改革示范区山西太原030024 科廷大学土木与机械工程学院澳大利亚6845 山西国源煤层气综合利用工程技术股份有限公司山西太原030024

针对多层坚硬顶板巷道受相邻工作面采动影响导致巷道维护困难的问题,以碾焉煤矿8104运输顺槽为工程背景,综合采用实验室试验、理论分析、数值模拟与现场工业性试验等,研究了多层坚硬顶板动压巷道的矿压显现规律及其机理,提出了深浅孔组... 详细信息

针对多层坚硬顶板巷道受相邻工作面采动影响导致巷道维护困难的问题,以碾焉煤矿8104运输顺槽为工程背景,综合采用实验室试验、理论分析、数值模拟与现场工业性试验等,研究了多层坚硬顶板动压巷道的矿压显现规律及其机理,提出了深浅孔组合爆破切顶卸压技术,并分析了控制效果。结果表明:(1)多层坚硬顶板巷道围岩变形主要分为缓慢变形、快速变形与变形趋于稳定等3个阶段,并在快速变形阶段呈台阶式增长的变化规律,其“台阶”数量与近场内坚硬顶板的层数有关;(2)深浅孔组合爆破切顶后,切断了低位关键层的侧向悬臂结构,减少了低位关键层破断引起的动载次数;同时缩短了高低位关键层的悬臂梁长度,减小施加给区段煤柱的静载,从而共同降低了邻近动压巷道围岩的压力;(3)相较不切顶时,浅孔爆破、深孔爆破和深浅孔组合爆破等3种不同切顶方式作用后,煤柱侧的平均垂直应力分别降低了14.8%、8.9%、29.7%,并且深浅孔组合爆破切顶后,在垮落带中顶板垮落更充分,在裂隙带中岩层断裂位置最靠近煤柱,采空区中部覆岩产生的裂隙也更均匀;(4)深浅孔组合爆破切顶后,8104运输顺槽在8103邻近工作面和8104工作面两次采动影响后,围岩变形量小于400 mm,保障了矿井安全高效生产。

关键词：多层坚硬顶板矿压显现规律切顶卸压深浅孔组合爆破顶板结构

Structure Refinement of Bi_(2)Sr_(1.855)Ca_(1.145)Cu_(2)O_(8) from Neutron Data

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Chinese Physics Letters 1991年第10期8卷 521-524页

作者： YE Chuntang YANG Jilian zhang baisheng LI Jizhou KANG Jian JIN Lan DING Yongfan HE Yusheng zhang Jincang HE Aisheng XIANG Jiong Institute of Atomic Energy Beijing 102413 Department of Physics Tsiaghua UniversityBeijing 100084 Visiting scholar from Henan Normal University Visiting scholar from North University of Technology

Neutron diffraction study on the structure of Bi_(2)Sr_(1.855)Ca_(1.145)Cu_(2)O_(8) was carried *** refinements show that the average subcell structure for Bi_(2)Sr_(1.855)Ca_(1.145)Cu_(2)O_(8) is in the best fit of the space group Fmmm and the structure is described by alternate stacking of SrO-CuO_(2)-Ca-CuO_(2)-SrO slab and a double BiO *** oxygen layer sandwiched by the bismuth layers was conRrmed.

关键词： structure sandwich

Mechanism of action, benefits, and research gap in fermented soybean meal utilization as a high-quality protein source for livestock and poultry

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Animal Nutrition 2024年第1期16卷 130-146页

作者： Modinat T.Lambo Haokai Ma Haosheng zhang Peng Song Hongxiang Mao Guowen Cui baisheng Dai Yang Li Yonggen zhang College of Animal Science and Technology Northeast Agricultural University Wilmar (Shanghai) Biotechnology Research and Development Center Co. Ltd College of Electrical Engineering and Information Northeast Agricultural University

Animal nutritionists have incessantly worked towards providing livestock with high-quality plant protein feed *** meal (SBM) has been an essential and predominantly adopted vegetable protein source in livestock feeding for a long time;however,several SBM antinutrients could potentially impair the animal's performance and growth,limiting its *** processing methods have been employed to remove SBM antinutrients,including fermentation with fungal or bacterial *** to the literature,fermentation,a traditional food processing method,could improve SBM's nutritional and functional properties,making it more suitable and beneficial to *** current interest in health-promoting functional feed,which can enhance the growth of animals,improve their immune system,and promote physiological benefits more than conventional feed,coupled with the ban on the use of antimicrobial growth promoters,has caused a renewed interest in the use of fermented SBM (FSBM) in livestock *** review details the mechanism of SBM fermentation and its impacts on animal health and discusses the recent trend in the application and emerging advantages to livestock while shedding light on the research gap that needs to be critically addressed in future *** appears to be a multifunctional high-quality plant protein source for *** removing soybean antinutrients,beneficial bioactive peptides and digestive enzymes are produced during fermentation,providing probiotics,antioxidants,and immunomodulatory *** aspects regarding FSBM feeding to animals remain uncharted,such as the duration of fermentation,the influence of feeding on digestive tissue development,choice of microbial strain,and possible environmental impact.

关键词： Soybean meal Protein feed Fermentation Microorganism Livestock

Approach to Anomaly Detection in Microservice System with Multi-Source Data Streams

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ZTE Communications 2022年第3期20卷 85-92页

作者： zhang Qixun HAN Jing CHENG Li zhang baisheng GONG Zican Peking University Beijing 100091China ZTE Corporation Shenzhen 518057China

Microservices have become popular in enterprises because of their excellent scalability and timely update ***,while fine-grained modularity and service-orientation decrease the complexity of system development,the complexity of system operation and maintenance has been greatly increased,on the *** types of system failures occur frequently,and it is hard to detect and diagnose failures in ***,microservices are updated *** anomaly detection models depend on offline training and cannot adapt to the frequent updates of *** paper proposes an anomaly detection approach for microservice systems with multi-source data *** approach realizes online model construction and online anomaly detection,and is capable of self-updating and *** results show that this approach can correctly identify 78.85%of faults of different types.

关键词： anomaly detection data stream microservice monitored indicator system log

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关于导电涂料导电性能的讨论

涂料工业 1996年第1期26卷 31-36页

作者：张柏生南京理工大学

讨论了各种因素，包括填料、溶剂、成膜物质、固化条件及外加磁场等对导电涂料导电性能的影响，表明各种因素的作用实质都在于改变了填料粒子的接触数目和彼此间的距离。通过这些因素的调整可以改进涂料的性能。

关键词：涂料导电涂料导电性

Cow-YOLO:Automatic cow mounting detection based on non-local CSPDarknet53 and multiscale neck

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International Journal of Agricultural and Biological Engineering 2024年第3期17卷 193-202页

作者： De Li Junhao Wang Zhe zhang baisheng Dai Kaixuan Zhao Weizheng Shen Yanling Yin Yang Li College of Electrical Engineering and Information Northeast Agricultural UniversityHarbin 150030China College of Agricultural Equipment Engineering Henan University of Science and TechnologyLuoyang 471023HenanChina College of Animal Sciences and Technology Northeast Agriculture UniversityHarbin 150030China Key Laboratory of Northeast Smart Agricultural Technology of Ministry of Agriculture and Rural Affairs Northeast Agricultural UniversityHarbin 150030China

Cows mounting behavior is a significant manifestation of estrus in *** timely detection of cows mounting behavior can make cows conceive in time,thereby improving milk production of cows and economic benefits of the *** methods of mounting behavior detection are difficult to achieve precise detection under occlusion and severe scale change environments and meet real-time ***,this study proposed a Cow-YOLO model to detect cows mounting *** meet the needs of real-time performance,YOLOv5s model is used as the baseline *** order to solve the problem of difficult detection of cows mounting behavior in an occluded environment,the CSPDarknet53 of YOLOv5s is replaced with Non-local CSPDarknet53,which enables the network to obtain global information and improves the model’s ability to detect the mounting ***,the neck of YOLOv5s is redesigned to Multiscale Neck,reinforcing the multi-scale feature fusion capability of model to solve difficulty detection under dramatic scale ***,to further increase the detection accuracy,the Coordinate Attention Head is integrated into ***,these improvements form a novel cow mounting detection model called Cow-YOLO and make Cow-YOLO more suitable for cows mounting behavior detection in occluded and drastic scale changes ***-YOLO achieved a precision of 99.7%,a recall of 99.5%,a mean average precision of 99.5%,and a detection speed of 156.3 f/s on the test *** with existing detection methods of cows mounting behavior,Cow-YOLO achieved higher detection accuracy and faster detection speed in an occluded and drastic scale-change ***-YOLO can assist ranch breeders in achieving real-time monitoring of cows estrus,enhancing ranch economic efficiency.

关键词： cows mounting automatic detection Cow-YOLO computer vision CSPDarknet53 multiscale neck