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中低浓度煤矸石浆液管道输送参数分析

中国煤炭地质 2024年第8期36卷 50-56,49页

作者：杜金龙王康巨星贺军王淇阮泽宇中煤地生态环境科技有限公司北京100070

煤矸石是进行煤矿采动空间注浆的重要材料,在粉碎制浆以后管道输送过程中,面临淤积堵管、摩阻损失以及管道承压安全性等问题,影响注浆效率。结合注浆实践,对中低浓度煤矸石浆液(质量浓度小于50%)的基本性质、流体类型以及管道输浆的流... 详细信息

煤矸石是进行煤矿采动空间注浆的重要材料,在粉碎制浆以后管道输送过程中,面临淤积堵管、摩阻损失以及管道承压安全性等问题,影响注浆效率。结合注浆实践,对中低浓度煤矸石浆液(质量浓度小于50%)的基本性质、流体类型以及管道输浆的流态、临界流速、摩阻损失和耐压能力等参数进行了系统研究。通过测试分析,发现中低浓度煤矸石浆液流体类型为牛顿体,管道输浆流态一般处于紊流的水力光滑区-混合摩擦区;演算了不同浆液浓度(体积浓度0.16~0.22、固相粒度(0.15~1.18mm))条件下临界流速(费祥俊公式与WASP公式对照),取值为1.2~1.9m/s(管道内径D=76mm);输浆摩阻损失本质上取决于比摩阻R(水力坡降),最敏感因子是管径(R∝D^(~5))。针对母杜柴登管道输浆实际,认为其堵管风险低,管道承压满足安全性要求,比摩阻理论值与实测值吻合;同时,鉴于目前比摩阻偏高,建议调整管道内径,由当前76mm提升至88mm及以上,比摩阻可下降一半以上。研究可用于指导中低浓度煤矸石浆液管道输送设计,为管道输浆的安全与高效提供理论依据。

关键词：煤矸石浆液中低浓度管道输送临界流速比摩阻管道承压

Research on TensorMulti-Clustering Distributed Incremental Updating Method for Big Data

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Computers, Materials and Continua 2024年第1期81卷 1409-1432页

作者： Zhang, Hongjun Zhang, zeyu ruan, Yilong Ye, Hao Li, Peng Shi, Desheng School of Computer Science Nanjing University of Posts and Telecommunications Nanjing 210023 China Ministry of Science and Technology Innovation China Communications Services Corporation Limited Beijing 100071 China School of Artificial Intelligence The University of Manchester Manchester M13 9PL United Kingdom Ministry of Technology Innovation China Telecom Artificial Intelligence Technology (Beijing) Corporation Limited Beijing 100032 China Ministry of Science and Technology Innovation Zhongbo Information Technology Research Institute Corporation Limited Nanjing 210012 China Jiangsu Postal Big Data Technology and Application Engineering Research Center Nanjing University of Posts and Telecommunications Nanjing 210003 China

The scale and complexity of big data are growing continuously, posing severe challenges to traditional data processing methods, especially in the field of clustering analysis. To address this issue, this paper introduces a new method named Big Data Tensor Multi-Cluster Distributed Incremental Update (BDTMCDIncreUpdate), which combines distributed computing, storage technology, and incremental update techniques to provide an efficient and effective means for clustering analysis. Firstly, the original dataset is divided into multiple subblocks, and distributed computing resources are utilized to process the sub-blocks in parallel, enhancing efficiency. Then, initial clustering is performed on each sub-block using tensor-based multi-clustering techniques to obtain preliminary *** new data arrives, incremental update technology is employed to update the core tensor and factor matrix, ensuring that the clustering model can adapt to changes in data. Finally, by combining the updated core tensor and factor matrix with historical computational results, refined clustering results are obtained, achieving real-time adaptation to dynamic data. Through experimental simulation on the Aminer dataset, the BDTMCDIncreUpdate method has demonstrated outstanding performance in terms of accuracy (ACC) and normalized mutual information (NMI) metrics, achieving an accuracy rate of 90% and an NMI score of 0.85, which outperforms existing methods such as TClusInitUpdate and TKLClusUpdate in most scenarios. Therefore, the BDTMCDIncreUpdate method offers an innovative solution to the field of big data analysis, integrating distributed computing, incremental updates, and tensor-based multi-clustering techniques. It not only improves the efficiency and scalability in processing large-scale high-dimensional datasets but also has been validated for its effectiveness and accuracy through experiments. This method shows great potential in real-world applications where dynamic data growth is

关键词： Data accuracy

Double-layered skeleton of Li alloy anchored on 3D metal foam enabling ultralong lifespan of Li anode under high rate

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Chinese Chemical Letters 2024年第3期35卷 479-485页

作者： Chaohui Wei zeyu Yao Jin ruan Zhicui Song Aijun Zhou Yingze Song Donghuang Wang Jicheng Jiang Xin Wang Jingze Li Yangtze Delta Region Institute(Huzhou) University of Electronic Science and Technology of ChinaHuzhou 313000China School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China State Key Laboratory of Environmental-Friendly Energy Materials Tianfu Institute of Research and InnovationSchool of Materials and ChemistrySouthwest University of Science and TechnologyMianyang 621010China

The high specific capacity and low negative electrochemical potential of lithium metal anodes(LMAs),may allow the energy density threshold of Li metal batteries(LMBs)to be pushed ***,the existing detrimental issues,such as dendritic growth and volume expansion,have hindered the practical implementation of *** three-dimensional frameworks(e.g.,copper and nickel foam),have been regarded as one of the fundamental strategies to reduce the local current density,aiming to extend the Sand'***,the local environment far from the skeleton is almost the same as the typical plane Li,due to macroporous space of metal ***,we built a double-layered 3D current collector of Li alloy anchored on the metal foam,with micropores interconnected macropores,via a viable thermal infiltration and cooling *** to the excellent electronic and ionic conductivity coupled with favorable lithiophilicity,the Li alloy can effectively reduce the nucleation barrier and enhance the Li^(+)transportation rate,while the metal foam can role as the primary promotor to enlarge the surface area and buffer the dimensional ***,the Li composite anode with hierarchical structure of primary and secondary scaffolds realized the even deposition behavior and minimum volume expansion,outputting preeminent prolonged cycling performances under high rate.

关键词： Double-layered skeleton Li alloy 3D Metal foam Ultralong lifespan Lithium metal batteries High rate

原位合成手性镍配合物中的阻转异构及磁性研究

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高等学校化学学报 2021年第3期42卷 709-716页

作者：阮泽宇杜杉楠黄国璋童明良刘俊良中山大学化学学院生物无机与合成化学教育部重点实验室广州510275

阻转异构体是一类特殊的手性化合物.利用轴手性配体制得的具有阻转异构行为的配合物在不对称催化等领域有广泛的应用.相比之下,通过原位反应由非手性底物制备这类手性配合物的报道较少,而利用非轴手性化合物原位组装得到非轴手性阻转异... 详细信息

阻转异构体是一类特殊的手性化合物.利用轴手性配体制得的具有阻转异构行为的配合物在不对称催化等领域有广泛的应用.相比之下,通过原位反应由非手性底物制备这类手性配合物的报道较少,而利用非轴手性化合物原位组装得到非轴手性阻转异构体的报道则更加罕见.乙腈是一种廉价易得的基本化工原料,在金属离子存在下活化乙腈分子是向有机分子中引入氰甲基的一种有效手段.本文利用乙腈分子进攻2-二吡啶基酮获得了一例含有氰甲基官能团的配体dpkMeCN-H[dpkMeCN=cyanomethyl-di(pyridin-2-yl)methanol].在Ni^(II)和K^(I)的配位作用下,该体系发生原位组装生成了一对阻转异构体.磁性拟合结果表明镍离子之间主要为铁磁耦合,且它们由于八面体畸变产生一定的零场分裂,使手性镍配合物产生磁各向异性.

关键词：手性阻转异构体氰甲基化反应磁性零场分裂

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一类递归神经网络系统的有限时间同步

三峡大学学报（自然科学版） 2022年第3期44卷 79-84页

作者：阮泽宇胡军浩梅俊中南民族大学数学与统计学学院武汉430074

针对非线性电路网络系统中的特殊系统—递归神经网络系统,本文拟采用事件触发间歇控制策略研究递归神经网络的有限时间同步问题.首先,根据有限时间间歇控制的理论推导过程,提出事件触发间歇控制规则;其次,提出间歇控制器,利用Lyapunov... 详细信息

针对非线性电路网络系统中的特殊系统—递归神经网络系统,本文拟采用事件触发间歇控制策略研究递归神经网络的有限时间同步问题.首先,根据有限时间间歇控制的理论推导过程,提出事件触发间歇控制规则;其次,提出间歇控制器,利用Lyapunov稳定性方法以及一些不等式技巧,得到了实现驱动-响应神经网络系统的有限时间同步的充分条件,并排除了Zeno行为;最后,通过数值实例验证了所提控制策略的有效性.

关键词：非线性电路网络系统递归神经网络事件触发控制有限时间同步间歇控制

基于数值模拟分析的上邻近煤层底板损伤特征研究

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矿业研究与开发 2021年第3期41卷 70-74页

作者：李巍阮泽宇郭亚超吴来伟张鹏余宏中国矿业大学矿业工程学院江苏徐州市221116

针对保护层开采技术中高瓦斯低渗透性煤层的卸压增透问题,利用UDEC离散元数值模拟软件,对上邻近煤层开采所造成的底板损伤进行了研究,并分析了底板损伤对下煤层瓦斯迁移的影响规律。研究表明:底板在工作面后方一定范围内会出现倒三角形... 详细信息

针对保护层开采技术中高瓦斯低渗透性煤层的卸压增透问题,利用UDEC离散元数值模拟软件,对上邻近煤层开采所造成的底板损伤进行了研究,并分析了底板损伤对下煤层瓦斯迁移的影响规律。研究表明:底板在工作面后方一定范围内会出现倒三角形应力降低区;依据底板破坏的力学机理不同,将底板裂隙带分为拉伸破坏裂隙带和屈服破坏裂隙带;2#煤层开采产生的底板裂隙促进了3#煤层瓦斯的解析及迁移,有效降低了3#煤层开采时的瓦斯涌出量,保障了工作面的安全生产。

关键词： UDEC数值模拟邻近煤层底板损伤保护层开采

西部典型矿区采动地下水流场演变特征与工作面涌水控制技术

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中国科学基金 2022年第6期36卷 1016-1026页

作者：黄艳利郭亚超齐文跃李俊孟高华东欧阳神央吴来伟阮泽宇中国矿业大学矿业工程学院新疆工程学院矿业工程与地质学院燕山大学河北省重型装备与大型结构力学可靠性重点实验室

西部矿区煤炭资源大规模开采过程中，面临顶板水害威胁。本文以受直罗组巨厚砂岩含水层影响较大的枣泉煤矿为研究对象，构建了矿区含水层富水性评价模型，确定了矿区弱、较弱、中等、较强和强共5类富水性分区及矿区安全、预警、危险和... 详细信息

西部矿区煤炭资源大规模开采过程中，面临顶板水害威胁。本文以受直罗组巨厚砂岩含水层影响较大的枣泉煤矿为研究对象，构建了矿区含水层富水性评价模型，确定了矿区弱、较弱、中等、较强和强共5类富水性分区及矿区安全、预警、危险和非常危险共4类突水危险性分区；探究了富水性分区和开采方式对地下水流场演化规律及工作面涌水量的影响，提出了基于工作面涌水量控制的开采布局设计方法，并在枣泉煤矿130203工作面进行工程应用，验证了预测结果的准确性和工作面布局的合理性。研究结果为西部矿区井下防治水提供了理论指导，对井田顶板水害防治和水资源保护提供了科学的决策依据。

关键词：砂岩含水层富水性分区突水危险性预测地下水流场工作面涌水

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榆林曹家滩煤矿井下充填注浆材料制备研究

中国煤炭地质 2023年第7期35卷 51-54页

作者：亓梦茹孙箐彬贺军阮泽宇颜磊杜金龙中煤地生态环境科技有限公司北京100070

围绕曹家滩煤矿井下充填工业试验开展了注浆材料制备研究。通过固定水灰比,改变级配,分析浆体对粗颗粒矸石粉(>0.15mm)的容纳极限;改变水灰比,固定级配,分析水灰比对浆体粗颗粒占比的影响。试验显示:固定水灰比为1.7∶1,粗颗粒(>0.15mm... 详细信息

围绕曹家滩煤矿井下充填工业试验开展了注浆材料制备研究。通过固定水灰比,改变级配,分析浆体对粗颗粒矸石粉(>0.15mm)的容纳极限;改变水灰比,固定级配,分析水灰比对浆体粗颗粒占比的影响。试验显示:固定水灰比为1.7∶1,粗颗粒(>0.15mm)占比40%以下,浆液状态稳定且具备可注性;固定水灰比为1.4∶1,粗颗粒(>0.15mm)占比高达70%,浆体依旧稳定。研究表明:水灰比减小,浆体对粗颗粒(>0.15mm)的容纳极限增大。

关键词：注浆材料级配浆液密度黏度

Fast ion/electron conducting scaffold of Li-Zn dual-phase alloy enable uniform deposition of Li metal at high current densities

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Journal of Energy Chemistry 2020年第12期51卷 285-292页

作者： zeyu Yao Weishang Jia Zihao Wang Jin ruan Xianggang Kong Xin Guan Zhihong Wang Jingze Li Ying Wang Wei Zou Fu Zhou School of Materials and Energy University of Electronic Science and Technology of China College of Optoelectronic Technology Chengdu University of Information Technology School of Mechanical and Automotive Engineering Shanghai University of Engineering Science Research and Development Center Tianqi Lithium Co. Ltd.

The commercial application of Li metal anodes is hindered by the dendrite growth and short cycling lifespan under high current density that are caused in part by the imbalance in the charge transport capability in the anode. Here, we present a design principle of a three-dimensional（3 D） skeleton to introduce highly efficient ion-and electron-conducting channels in the Li anode. A process of thermal infusion followed by cooling is used to synthesize a dual-phase Li-rich Li-Zn alloy that consists of an LiZn intermetallic compound phase as the 3 D framework and the uniformly distributed Li metal phase as the active material. The phase-segregated Li-Zn phase endows the Li10 Zn alloy with built-in fast ion transport channels, in addition to the ionic conducting pathway of the liquid electrolyte, leading to better charge balance and conformal deposition of Li on the scaffold. Consequently, the Li10 Zn alloy anode can be operated for more than 10000 cycles at a high current density of 5 mA cmand areal capacity of 1 m Ah cm. Remarkably, even for the high current density of 10 m A cmand areal capacity as large as 10 mAh cm, the cycling lifetime is still greater than 500 cycles. Thus, the scaffold with high ion/electron mixed conductivity is highly effective for inhibiting Li dendrite growth and prolonging the cycling lifespan, highlighting the great promise of the fast ion conducting alloy framework for use in Li secondary batteries at high current densities.

关键词： Lithium metal anode Fast ion/electron conducting scaffold Dual-phase Li-rich Li-Zn alloy Composite lithium anode Lithium dendrite