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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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Numerical Investigation on Inclined Hydraulic Transport of Large Particles for Deepsea Mining

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China Ocean Engineering 2023年第3期37卷 420-432页

作者： LIU Lei LI Xin TIAN Xin-liang zhang Xian-tao 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

Hydraulic transport in pipelines is the most promising conveying method for large ore particles in deepsea *** dynamic performances of particles during transportation in vertical,inclined and horizontal pipelines are significant for the design of hydraulic transport *** the present study,we focus on the statistical characteristics and flow regimes of the mixture composed of ore particles and seawater in the *** simulations are conducted by using Computational Fluid Dynamics(CFD)and Discrete Element Method(DEM).The influences of inclination angle and particle diameter are evaluated through two sets of numerical *** regulation of the inclined transport is totally different from that of the vertical transport,whereas the dynamics of the mixtures in inclined and horizontal pipes are similar.A number of particles accumulate on the pipe wall even with a small inclination *** hydraulic gradient and local concentration would occur when the inclination angle of the pipe is in the range of30°-60°.With the decrease of particle diameter,the particle flow becomes uniform,reflected by the almost uniform particle distribution in the vertical pipe and the clear interface between the suspended load and the bed-load in the inclined ***,small particles will introduce larger local concentrations and hydraulic gradients in the inclined pipe,which is not conducive to particle transport.

关键词： deepsea mining hydraulic transport inclined pipe numerical simulation

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Deuterated chloroform replaces ultra-dry chloroform to achieve high-efficient organic solar cells

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Chinese Chemical Letters 2025年第1期36卷 369-373页

作者： Zhiyang zhang Yi Chen Yingnan zhang Chuanlang zhan Key Laboratory of Advanced Materials Chemistry and Devices(AMCDLab)of the Department of Education of Inner Mongolia Autonomous Region College of Chemistry and Environment ScienceInner Mongolia Normal UniversityHuhehot 010022China

Chloroform is a common and excellent solvent for preparing high-efficient organic solar cells(OSCs),however,it is toxic and poisonable *** comparisons,deuterated chloroform(DC)is less toxic and costly,and particularly,it is non-poisonable *** this paper,we use DC to replace ultra-dry chloroform(UC)as the processing solvent for preparation of active layers of organic solar ***,we selected PM6:BTP-e C9 as the basic binary and counted 100 solar cells'data,from which comparable device performance were obtained with use of DC and ***,DC showed better reproducibility,superior storage under a nitrogen atmosphere and a little better performance than *** DC and UC gave rise of comparable hole and electron mobilities and similar charge recombination ***,we based PM6:Y6 and D18-Cl:Y6 as the binaries and similar effects were obtained from both UC and DC when counting 30 devices for each ***,the universality of the use of DC for preparing highefficient OSCs were again checked with several binary and ternary *** all,this study demonstrate that DC can replace UC for use in the field of OSCs.

关键词： Organic solar cell Processing solvent Deuterated chloroform Ultra-dry chloroform Active layer

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Acoustic wave propagation in a porous medium saturated with two fluids and a solid

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Chinese Physics B 2025年第2期34卷 297-307页

作者： Lin Liu xiu-Mei zhang xiu-Ming Wang State Key Laboratory of Acoustics Institute of AcousticsChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100149China Beijing Engineering Research Center of Sea Deep Drilling and Exploration Institute of AcousticsChinese Academy of SciencesBeijing 100190China

Wave propagation in multi-phase porous media is a significant research topic. There are a series of studies about porous media saturated with a single fluid, a solid and a fluid, two fluids, and three fluids. Some gas hydrate-bearing sediments are typical multiphase porous media saturated with a solid(gas hydrates) and two fluids(water and gas). Based on existing theories of porous media, we develop a theory and give a comprehensive analysis of wave propagation in a poroelastic medium saturated with two fluids and a solid. Initially, we establish the constitutive relations and equations of motion. Based on Biot's approach for describing the equations of motion in fluid-saturated porous media at the macroscale,the kinetic energy density, potential energy density, and dissipative energy density are derived. After deriving the equations of motion, a plane wave analysis predicts the existence of four compressional waves, denoted P1, P2, P3, and P4 waves,and two shear waves, denoted S1 and S2 waves. Numerical examples are presented to demonstrate how velocities and attenuations of various waves behave with gas saturation, gas hydrate saturation, and frequency. A model degradation to porous media saturated with a single fluid supports the validity of the theory, which enriches the theory of multiphase porous media and provides a foundation for the evaluation of gas hydrate-bearing sediments.

关键词： four-phase porous media equations of motion plan wave analysis wave characteristics

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Optimizing battery deployment: Aging trajectory prediction enabling homogenous performance grouping

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Journal of Energy Chemistry 2025年第1期100卷 565-577页

作者： Shuquan Wang Feng Gao zhan Ma Hao Tian Yusen zhang School of Control Science and Engineering Shandong UniversityJinan 250061ShandongChina Key Lab of Power System Intelligent Dispatch and Control of Ministry of Education Shandong UniversityJinan 250061ShandongChina

As battery deployments in electric vehicles and energy storage systems grow, ensuring homogeneous performance across units is crucial. We propose a multi-derivative imaging fusion(MDIF) model, employing advanced imaging and machine learning to predict battery aging trajectories from minimal initial data, thus facilitating effective performance grouping before deployment. Utilizing a derivative strategy and Gramian Angular Difference Field for dimensional enhancement, the MDIF model uncovers subtle predictive features from discharge curve data after only ten cycles. The architecture includes a parallel convolutional neural network with lateral connections to enhance feature integration and *** on a self-developed dataset, the model achieves an average root-mean-square error of 0.047 Ah and an average mean absolute percentage error of 1.60%, demonstrating high precision and *** robustness is further validated through transfer learning on two publicly available datasets, adapting with minimal retraining. This approach significantly reduces the testing cycles required, lowering both time and costs associated with battery testing. By enabling precise battery behavior predictions with limited data, the MDIF model optimizes battery utilization and deployment strategies, enhancing system efficiency and sustainability.

关键词： Lithium-ion battery Battery prognostics Fusion model Convolutional neural network Transfer learning

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深水立管涡激振动单模态响应时频联合预报模型

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中国石油大学学报（自然科学版） 2010年第1期34卷 60-63,69页

作者：王腾张修占朱为全中国石油大学石油工程学院山东东营257061

利用基于圆柱体的受迫振荡试验数据提出的流体力模型,依据VIVANA的频域方法识别主导响应频率并建立升力和阻力模型,推导立管涡激振动单模态响应时频联合预报模型,在时域内通过迭代求解出立管的单模态涡激振动响应。结果表明:所推导的时... 详细信息

利用基于圆柱体的受迫振荡试验数据提出的流体力模型,依据VIVANA的频域方法识别主导响应频率并建立升力和阻力模型,推导立管涡激振动单模态响应时频联合预报模型,在时域内通过迭代求解出立管的单模态涡激振动响应。结果表明:所推导的时频联合预报模型可用来预测立管的主导响应频率,对于低流速下激励出的单模态响应预报结果与试验结果吻合较好;对于高流速激励出的多模态参与的响应,整体响应及振型预测较好,但不能很好地预测出某些局部峰值。

关键词：立管涡激振动单模态响应时频联合模型

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Nickel extraction from nickel laterites: Processes, resources, environment and cost

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China Geology 2025年第1期8卷 187-213页

作者： Zhen-fang zhang Wei-bo zhang Zhen-guo zhang xiu-fa Chen Development Research Center of China Geological Survey Ministry of Natural ResourcesBeijing 100037China Inner Mongolia University of Technology Hohhot 010062China

With the development of the new energy industry and the depletion of nickel sulfide ore resources,laterite nickel ore has become the main source of primary nickel,and nickel for power batteries has become a new growth point in *** paper systematically summarizes the processes,parameters,products,recovery rates,environmental indicators,costs,advantages,disadvantages and the latest research progress of mainstream nickel extraction processes from laterite nickel *** also provides a comparative analysis of the environmental impact and economic efficiency of different nickel extraction *** is found that the current nickel extraction processes from laterite nickel ore globally for commercial production mainly include the RKEF process for producing ferronickel and the HPAL process for producing intermediate *** former accounts for about 80%of laterite nickel ore *** to each other,the investment cost per ton of nickel metal production capacity for the RKEF is about 43000$,with an operational cost of about 16000$per ton of nickel metal and a total nickel recovery rate of 77%–90%.Its products are mainly used in stainless *** the HPAL process,the investment cost per ton of nickel metal production capacity is about 56000$,with an operational cost of about 15000$per ton of nickel metal and a total nickel recovery rate of 83%–90%.Its products are mainly used in power *** significant differences between the two lies in energy consumption and carbon emissions,with the RKEF being 2.18 and 2.37 times that of the HPAL,*** the use of clean energy can greatly reduce the operational cost and environmental impact of RKEF,if RKEF is converted to producing high Ni matte,its economic and environmental performance still cannot match that of the HPAL and oxygen-enriched side-blown ***,it can be inferred that with the increasing demand for nickel in power batteries,HPAL and oxygen-enriched side

关键词： Laterite nickel ore Limonite Saprolite Nickel extraction Pyrometallurgy Power batteries Hydrometallurgy Cost Environmental impact Life cycle assessment Comprehensive utilization Mineral exploration engineering

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平台运动对深水钻井隔水管非线性动力响应的影响(英文)

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船舶力学 2010年第6期14卷 606-618页

作者：王腾张修占朱为全中国石油大学(华东)海洋工程系山东东营257061

文章建立了波浪、海流和船体运动等载荷综合作用下的深水钻井隔水管非线性时域动力响应模型,模型考虑了顶部张力和隔水管内部泥浆对隔水管动力响应的影响,计入了张力沿隔水管长度的变化,并采用有限差分法求解了四阶偏微分运动方程。计... 详细信息

文章建立了波浪、海流和船体运动等载荷综合作用下的深水钻井隔水管非线性时域动力响应模型,模型考虑了顶部张力和隔水管内部泥浆对隔水管动力响应的影响,计入了张力沿隔水管长度的变化,并采用有限差分法求解了四阶偏微分运动方程。计算了随机波浪和规则波浪下船体运动对深水钻井隔水管非线性动力响应的影响,研究分析了船体平均偏移以及波频响应和低频响应的周期和幅值对深水钻井隔水管动力响应的影响。结果表明,船体运动对深水钻井隔水管动力响应有较大的影响,在随机波浪和海流作用下,考虑船体运动时,隔水管上部最大弯矩增大了59%。船体的平均偏移主要影响底部最大弯矩。船体波频运动对上部最大弯矩有较大影响,随着波频响应的周期和幅值的变化,上部最大弯矩变化较快,而低频响应的则主要影响隔水管上部弯矩。

关键词：钻井隔水管深水船体运动非线性动力

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Dynamic modeling and analysis of brucellosis on metapopulation network:Heilongjiang as cases

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Chinese Physics B 2025年第1期34卷 117-127页

作者： Pei Xuan-Li Wu Pei Pei Ming-Tao Li Juan zhang xiu-xiu zhan School of Mathematics Taiyuan University of TechnologyTaiyuan 030024China Department of Information Technology Shanxi Professional College of FinanceTaiyuan 030008China Complex System Research Center ShanXi UniversityTaiyuan 030006China Alibaba Complex Science Research Center Hangzhou Normal UniversityHangzhou 311121China

Livestock transportation is a key factor that contributes to the spatial spread of *** analyze the impact of sheep transportation on brucellosis transmission,we develop a human–sheep coupled brucellosis model within a metapopulation network ***,we examine the positively invariant set,the basic reproduction number,the existence,uniqueness,and stability of disease-free equilibrium and the existence of the endemic equilibrium of the *** practical application,using Heilongjiang province as a case study,we simulate brucellosis transmission across 12 cities based on data using three network types:the BA network,the ER network,and homogeneous mixing *** simulation results indicate that the network's average degree plays a role in the spread of *** BA and ER networks,the basic reproduction number and cumulative incidence of brucellosis stabilize when the network's average degree reaches 4 or *** contrast,sheep transport in a homogeneous mixing network accelerates the cross-regional spread of brucellosis,whereas transportation in a BA network helps to control it ***,the findings suggest that the movement of sheep is not always detrimental to controlling the spread of *** cities with smaller sheep populations,such as Shuangyashan and Qitaihe,increasing the transport of sheep outward amplifies the spatial spread of the *** contrast,in cities with larger sheep populations,such as Qiqihar,Daqing,and Suihua,moderate sheep outflow can help reduce the *** addition,cities with large livestock populations play a dominant role in the overall transmission dynamics,underscoring the need for stricter supervision in these areas.

关键词： brucellosis metapopulation network basic reproduction number sheep transport

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Dual-functional additive of cesium ion for achieving ultrahigh efficiency of persistent phosphorescence in existing polymer-based materials

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Science China Chemistry 2025年第2期68卷 754-762页

作者： Yao Liu Jinzheng Chen Yiling Miao Kaimin zhang Faxu Lin Huahua Huang Lina zhang zhan Yang Yi zhang Zhenguo Chi Zhiyong Yang Key Laboratory for Polymeric Composite&Functional Materials of Ministry of Education Guangdong Engineering Technology Research Center for High-performance Organic and Polymer Photoelectric Functional FilmsGuangdong Basic Research Center of Excellence(GBRCE)for Functional Molecular EngineeringSchool of ChemistrySun Yat-sen UniversityGuangzhou 510275China School of Materials Science and Engineering Sun Yat-sen UniversityGuangzhou 510275China College of Materials Science and Engineering Hebei University of EngineeringHandan 056038China School of Environmental and Chemical Engineering Wuyi UniversityJiangmen 529020China

Despite great achievements obtained for polymer-based room-temperature phosphorescence(RTP)materials,the limited efficiencies of persistent RTP still hinder their ***,a simple and universal strategy of using the dual-functional additive of Cs+was presented,which could simultaneously enhance the efficiency(Φp)and maintain the long lifetime(τp)of RTP in existing polymer-based systems with various phosphors and *** them,the commercial emitter(TpB)-doped polyvinyl alcohol(PVA)/Cs_(2)CO_(3) system possessed an extremely high Φp up to 75.5% and still maintained a longτp of 2.13 s,by introducing the heavy-atom effect and an extra network of ionic bonding through the Cs+***,the temperature resistance of RTP in TpB@PVA/Cs+film could also be improved to 85℃.More satisfactorily,the efficiency of Förster resonance energy transfer(FRET)from RTP to near-infrared(NIR)was also remarkably enhanced in the multi-component *** work provides a simple and universal strategy for developing polymer systems with high RTP performance.

关键词： persistent phosphorescence cesium carbonate efficiency heavy-atom effect ionic interaction

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