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Experimental Investigation on Vertical Hydraulic Transport of Ores in Deepsea Mining

China Ocean Engineering 2024年第1期38卷 42-53页

作者： liu Lei liu jian-cheng LI Xin XU Li-xin ZHANG Xiu-zhan State Key Laboratory of Ocean Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Naval Architecture Ocean and Civil EngineeringShanghai Jiao Tong UniversityShanghai 200240China Sanya Yazhou Bay Institution of Deep-sea Sci-Tech Shanghai Jiao Tong UniversitySanya 572000China China Merchants Marine And Offshore Research Institute Co. Ltd.Shenzhen 518067China China Merchants Deepsea Research Institute(Sanya)Co. Ltd.Sanya 572000China School of Naval Architecture and Ocean Engineering Jiangsu University of Science and TechnologyZhenjiang 212100China

Deepsea mining has been proposed since the 1960s to alleviate the lack of resources on *** hydraulic transport of collected ores from the seabed to the sea surface is considered the most promising method for industrial *** the present study,an indoor model test of the vertical hydraulic transport of particles was conducted.A noncontact optical method has been proposed to measure the local characteristics of the particles inside a vertical pipe,including the local concentration and particle *** hydraulic gradient of ore transport was evaluated with various particle size distributions,particle densities,feeding concentrations and mixture flow *** transport,the local concentration is larger than the feeding concentration,whereas the particle velocity is less than the mixture *** qualitative effects of the local concentration and local fluid velocity on the particle velocity and slip velocity were *** local fluid velocity contributes significantly to particle velocity and slip velocity,whereas the effect of the local concentration is marginal.A higher feeding concentration and mixture flow velocity result in an increased hydraulic *** effect of the particle size gradation is slight,whereas the particle density plays a crucial role in the transport.

关键词： deepsea mining vertical hydraulic transport experiment flow characteristics

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Low Temperature Reduction Degradation Characteristics of Sinter,Pellet and Lump Ore

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Journal of Iron and Steel Research International 2011年第8期18卷 20-24页

作者： WU Sheng-li liu Xiao-qin ZHOU Qi XU jian liu cheng-song School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China

The reduction degradation characteristics of typical sinter, pellet and lump ore were tested with the reducing gas conditions simulating two kinds of irowmaking processes. The results show that, in the same condition of gas composition and temperature, the reduction degradation degree （RDI〈3.15mm） of sinter is high, RDI〈3.15mm of lump ore is low and RDI〈3.15 mm of pellet is in the middle level. With two kinds of gas composition simulating different iron-making processes, the reduction degradation indices （RDI） of three kinds of iron ores all present the tenden- cy of ＂inverted V-shape＂ in the temperature range from 450 to 650℃, and the RDI reach the maximum value at 550℃. The reduction degradation degrees of iron ores are extended when mixing the gas with hydrogen to increase the re duction potential, and the influence extent is discrepant for different iron ores. Colligating the increase amplitude of grains in small size fraction, the influence of reducing gas on lump ore is the greatest, the influence on sinter is the second, and the sensitivity of pellet on the reducing gas properties change is relatively small. As for the degradation form, lump ore and sinter both present the degradation ,of cracking, and the distribution of small grains generated from the cracking is in the range from 03 5 to 6. 3 mm uniformly. The lump ore presents surface cracking, while sin- ter presents integral cracking. The pellet presents the degradation of surface stripping, and the proportion of grains smaller than 0.5 mm is the highest, which is up to 90% in the grains smaller than 3.15 mm.

关键词： sinter pellet lump ore low temperature reduction degradation characteristic gas property

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Observation of topological charge transformations in acoustic vortex using passive periodic systems

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 140-147页

作者： Di-Chao Chen Xie liu Changqing Xu Da-jian Wu Ying cheng Xiao-Jun liu School of Physics and Technology Nanjing Normal University Key Laboratory of Modern Acoustics School of Physics Nanjing University

Vortex transmutation utilizes a periodic system, which not only enables the alteration of the topological charge(TC) of unstable input vortices but also facilitates their transformation into stable structures. This approach is crucial for investigating the characteristics of vortices in various wave systems. Here, we achieve acoustic vortex TC transmutation by employing a welldesigned dual-structured plate external system(DPES). The interactions between the acoustic vortex and the finite-order discrete rotational symmetry lead to the transformation of its topological charge when complete rotational symmetry is broken to Nthorder discrete symmetry. Our results experimentally demonstrate the acoustic vortex TC transmutation based on passive artificial structures, enabling numerous applications in particle manipulation and information multiplexing as well as advancing our understanding and control over free-space acoustic vortices.

关键词： acoustic vortex topological charge transformation artificial structure

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核设备制造中的项目管理

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核动力工程 2005年第3期26卷 288-290页

作者：刘建成东方锅炉(集团)股份有限公司四川自贡643001

核电站项目管理首先应完善管理机构。核设备质保大纲和项目管理的组织机构由核电容器部、制造部、质量保证部等5个部门组成。总经理对核承压设备制造质量负全面责任。分管核电工作的副总经理统一负责公司核承压设备制造有关的质量、技... 详细信息

核电站项目管理首先应完善管理机构。核设备质保大纲和项目管理的组织机构由核电容器部、制造部、质量保证部等5个部门组成。总经理对核承压设备制造质量负全面责任。分管核电工作的副总经理统一负责公司核承压设备制造有关的质量、技术和进度,组织管理部门进行审查。质量管理部部长由总经理授予足够的权力,包括不受经费和进度的约束,以建立和不断完善质量保证大纲,并验证有关部门和人员的执行情况。制造进度计划的编制应该保证实施的可行性、工作的连续性和执行计划的灵活性。对计划应该进行全过程的跟踪,检查计划的实施情况并及时反馈。

关键词：核设备制造项目管理合同管理计划管理

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无线传感器网络中基于聚簇的域连接算法

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中南大学学报（自然科学版） 2009年第1期40卷 195-199页

作者：王建明刘建成湖南商学院计算机与电子工程系湖南长沙410205 中南大学信息科学与工程学院湖南长沙410083

针对无线传感器网络中数据处理时节能效率不高的特点,提出一种有效节能的域连接算法(Regions join algorithm,RJA)。该算法首先结合传感器网络的节点特性和位置信息,提出一种基于聚簇的定向传播模型,该模型把传感器网络按域的划分来构... 详细信息

针对无线传感器网络中数据处理时节能效率不高的特点,提出一种有效节能的域连接算法(Regions join algorithm,RJA)。该算法首先结合传感器网络的节点特性和位置信息,提出一种基于聚簇的定向传播模型,该模型把传感器网络按域的划分来构建聚簇,查询只需在聚簇中进行,因而能有效减少传感器网络中信息传输的时间复杂度,同时利用网络中虚电路连接的思想,只将连接属性中与匹配相关的数据投送到链路中的公共区域进行比较运算,并不需要把整个信息表在网络中传送,因而能提高链路传输的效率。理论分析和实验结果表明,该算法与传统算法相比节省能量。

关键词：无线传感器网络聚簇定向传播模型区域连接

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High Resolution Elastic Recoil Detection Analysis with Q3D Magnetic Spectrometer

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Chinese Physics Letters 1999年第7期16卷 493-495页

作者： LU Xiu-qin FU Chang-bo LIANG Gang GUO Ji-yu ZHAO Kui LI Shu-yuan liu jian-cheng jianG Hua YANG Bing-fan Department of Nuclear Physics China Institute of Atomic EnergyBeijing 102413

Elastic recoil detection analysis technique with△E-E particle identification and Q3D momentum analysis has been developed to determine high resolution depth profiles in thin foils and multilayer systems.A depth resolution of 1.2nm was achieved at the surface of the samples using a high quality 100 MeV^(127)I *** method was applied to depth profile analysis of C/LiF multilayers,superconductor and GaN foil samples.

关键词： Elastic beam. superconductor

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Resistance of Cement-based Grouting Materials with Nano- SiO_(2) Emulsion to Chloride Ion Penetration

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 114-119页

作者： LI Shuiping cheng jian WEI Chao YUAN Bin YU chengxiao College of Architectural Science and Engineering Yangzhou UniversityYangzhou 225127China

The chloride penetration resistance of cement-based grout materials was improved by nano-silica *** of mixtures containing different nano-silica particles or emulsions were exposed in sodium chloride solutions of specific concentrations with different test *** properties of the mixes were assessed in terms of weight loss and compressive strength.X-ray diffraction(XRD)and scanning electron microscopy(SEM)of mixes were performed to analysis the phase evolution and *** results demonstrated that the introduction of nano-SiO_(2) emulsion significantly decreased the compressive strength loss and calcium hydroxide(CH)crystal content of hydration production,and then enhanced the resistance of cement-based grouting materials to chloride ion *** improvement derives from the filling and pozzolanic effects of nano-SiO_(2) particles,which were incorporated via an emulsion and attributed to a well dispersion in grouting matrix.

关键词： grouting materials nano-SiO_(2)emulsion chloride ion penetration,weight loss strength loss

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当代女性主义认识论的理论来源探析

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教学与研究 2013年第5期 73-79页

作者：刘建成济南大学马克思主义学院山东济南250022

当代女性主义认识论的理论来源从总体上说主要有三个方面:一是西方女权主义及其发展,二是传统科学观及其批判,三是后现代主义认识论。具体而言,则包括四个方面:源自女性心理的性别意识、女权主义的解放政治观、科技理性反思和同情性认... 详细信息

当代女性主义认识论的理论来源从总体上说主要有三个方面:一是西方女权主义及其发展,二是传统科学观及其批判,三是后现代主义认识论。具体而言,则包括四个方面:源自女性心理的性别意识、女权主义的解放政治观、科技理性反思和同情性认识模式思想。由女性心理和性别意识衍生出了性别压迫和性别平等理念;女权主义解放政治观作为一种政治文化基因经过多次嬗变导出了男性与女性、男性认识与女性认识的二元界分;科技理性反思蕴含着信念的可变性观念,并为人类提供了一个知识生成的社会过程的性别因素标准;同情性认识模式则满足了人们关于知识来源的价值追问,提出了认识的相对性、非中立性以及主体偏好的存在性思想。通过梳理上述四个要素与女性主义认识论的关系,意在说明,当代女性主义认识论是建立在西方特殊的社会历史背景和政治文化基础上的一种哲学思想。

关键词：女性主义认识论传统科学观后现代主义认识论

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AMS Measurement of ^(53)Mn at CIAE

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Chinese Physics Letters 2011年第7期28卷 69-72页

作者： DONG Ke-Jun HE Ming LI Chao-Li HU Hao liu Guang-Shan CHEN Zhi-Gang LI Zhen-Yu WU Shao-Yong liu jian-cheng YOU Qu-Bo JIN Chun-Sheng WANG Xiang-Gao SHEN Hong-Tao GUAN Yong-Jing YUAN jian jianG Shan China Institute of Atomic Energy P.O.Box 275(50)Beijing 102413 College of Oceanography and Environmental Science Xiamen UniversityXiamen 361005 College of Physics Science and Technology Guangxi UniversityNanning 530004 College of Physics and Technology Guangxi Normal UniversityGuilin 541004

The long-lived isotope ^(53)Mn cosmogenically produced in situ is a very useful indicator for geochronological dating.A new ^(53)Mn accelerator−mass-spectrometry(AMS)measurement method is developed based on the HI-13 Tandem Accelerator andΔE−Q3D detection system at China Institute of Atomic *** performance of ^(53)Cr isobar separation and suppression is tested by a series of ^(53)Mn standards and commercial MnO *** results show that theΔE−Q3D detection system brought about an overall suppression factor of more than 107 for the interfering isobar ^(53)Cr.

关键词： system separation Q3D

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Three-dimensional fracture of UO2 ceramic pellets by phase field modeling

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 169-180页

作者： Wei Xiong Xuan Ye Hongzhang cheng Xiaoming liu Institute of Nuclear and New Energy Technology Collaborative Innovation Center of Advanced Nuclear Energy Technology Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education Tsinghua University State Key Laboratory of Nonlinear Mechanics Institute of Mechanics Chinese Academy of Sciences School of Engineering Science University of Chinese Academy of Sciences

Fracture is the primary failure type for the UO2ceramic pellets,which are operated under irradiation and thermal processes,and physically confined by the *** this work,by combining closely coupled physical processes of heat conduction,heat transfer,and mechanical deformation with the cohesive phase field framework,we proposed a high-precision modeling of quasistatic cracking of three-dimensional （3D） UO2ceramic fuel pellets under high temperature and *** simulation results agree well with the experimental results,indicating that the proposed method has the potential to capture 3D crack modes in the interested time ***,we studied the relation of the 3D fracture patterns of fuel pellets with the peak power *** was found that the power level plays a critical role in determining the competition between radial and circumferential cracks,as well as transverse penetrating cracks.

关键词： phase field method nuclear fuel pellet coupled thermo-mechanical model thermal fracture

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