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

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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A dual-protease-triggered chemiluminescent probe for precise tumor imaging

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Chinese Chemical Letters 2025年第2期36卷 302-306页

作者： Zhihui Zhang Ru Sun Chong Bian Hongbo wang zhen Zhao Panpan Lv Jianzhong Lu Haixin Zhang Hulie Zeng Yuanyuan Chen Zhijuan Cao Department of Pharmaceutical Analysis School of PharmacyFudan University Minhang Branch Zhongshan HospitalFudan University China State Institute of Pharmaceutical Industry Shanghai Jahwa United Co. Ltd.

Imaging detection of interlinked dual proteases is imperative for precise tumor imaging, which remains challenging due to limited modification position of specific substrate and possible steric ***, we have developed a unimolecular chemiluminescent probe(LGP-CL) tandemly activated by two proteases interlinked with liver cancer to achieve precise tumor imaging. Probe LGP-CL consists of a phenoxy-dioxetane scaffold caged by a tripeptide substrate(LGP, leucine-glycine-proline) as the sensing layer, which can be cleaved sequentially by aminopeptidase N(APN) and dipeptidyl peptidase IV(DPPIV)to turn on a strong chemiluminescent signal, and silenced by specific inhibitor of each enzyme, which accounts for an integrated logic gate(AND, OR and INHIBIT). The successful cleavage of dual proteases on the metabolic site depends on the proper structure of the tripeptide substrate, as confirmed by two probes design. Probe LGP-CL(LGP as the substrate) enables the excellent “dual-lock-dual-key” fit with a382-fold enhancement of chemiluminescent emission while no obvious signal is observed by using GPLCL(GPL as the substrate). By virtue of its rapid response(several minutes), high sensitivity and good cell viability, probe LGP-CL has been utilized to evaluate upregulated levels of proteases in vitro and in living systems, especially to distinguish liver tumor cells(Hep G2) from others(LO2, MCF-7, MCF-10a and RAW264.7). Overall, the newly developed CL probe may facilitate rapid investigation into the role played by proteases in liver diseases, enabling timely selection appropriate treatment. Therefore, our work not only sheds light on the rational design of optical probes for dual protease imaging, but provides a promising tool for clinical diagnosis and even drug discovery.

关键词： Chemiluminescent Dual-protease imaging Logic gates Phenoxy-dioxetane scaffold Tripeptide substrate

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模型预测控制在波浪能上应用的现状与挑战

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控制工程 2022年第9期29卷 1631-1637页

作者：王振春栾锋王年果刘福才燕山大学智能控制系统与智能装备教育部工程研究中心河北秦皇岛066004 燕山大学工业计算机控制工程河北省重点实验室河北秦皇岛066004

为了提高波浪能源的利用效率,许多机构和学者在波浪能转换装置的模型预测控制方面进行了大量的研究。波浪能转换装置一般要求在保持安全运行的同时实现最大功率能量捕获,其控制方法本质上是一个约束优化问题,应用模型预测控制方法能够... 详细信息

为了提高波浪能源的利用效率,许多机构和学者在波浪能转换装置的模型预测控制方面进行了大量的研究。波浪能转换装置一般要求在保持安全运行的同时实现最大功率能量捕获,其控制方法本质上是一个约束优化问题,应用模型预测控制方法能够很好地满足这一要求。首先对模型预测控制理论进行介绍,其次对国内外关于模型预测控制在波浪能转换装置上应用的研究现状进行阐述,最后指出在波浪能转换装置上应用模型预测控制方法所面临的挑战及研究方向。

关键词：波浪能转换装置控制方法最大功率捕获模型预测控制

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基于高频谐振变换器的高压充电电源设计

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电力电子技术 2010年第10期44卷 97-99页

作者：刘福才王猛王振春王彩红燕山大学电气工程学院河北秦皇岛066004

研究了一种高压电容器充电电源的原理、总体结构和软硬件的设计及其特点。该装置由逆变主电路和以TMS320C240DSP为核心的测控系统组成,可与计算机进行实时通信。主电路采用串联谐振软开关的控制方式,提高了变换器的工作效率,实现了对电... 详细信息

研究了一种高压电容器充电电源的原理、总体结构和软硬件的设计及其特点。该装置由逆变主电路和以TMS320C240DSP为核心的测控系统组成,可与计算机进行实时通信。主电路采用串联谐振软开关的控制方式,提高了变换器的工作效率,实现了对电容器充电的精确控制和恒流充电,具有良好的应用前景。

关键词：充电电源高压电容器串联谐振测控系统

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溶出伏安法测定蔬菜中的铊

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食品科学 2007年第2期28卷 227-228页

作者：张平姚焱汪珍春陈永亨广州大学环境科学系广东广州510006 广州大学生物工程系广东广州510006

在0.025mol/L醋酸-0.025mol/L醋酸钠缓冲介质中加入EDTA(ethylene diamine tetraacetic acid),以差示脉冲阳极溶出伏安法测定蔬菜中的铊。铊浓度在5.0×10-4～1.0×10-1mg/L范围有良好的线性关系,检出限为1.0×10-4mg/L,回收率为97.0%～... 详细信息

关键词：蔬菜铊差示脉冲阳极溶出伏安法测定

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First-episode psychiatric disorder risk from SARS-Co V-2 infection:A clinical analysis with Chinese psychiatric inpatients

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Journal of Biomedical Research 2025年第1期39卷 50-60页

作者： Ya Xie Zifeng Xu Yumin Zhang Yisheng Li Pengyu Du chun wang Clinical Mental Health Center the Affiliated Brain Hospital of Nanjing Medical UniversityNanjingJiangsu 210029China Medical School of Nanjing University NanjingJiangsu 210008China

The extensive spread of severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)throughout China in late 2022 has underscored the correlation between this virus and severe psychiatric ***,there remains a lack of reported clinical and pathological ***,we retrospectively reviewed the electronic medical records of psychiatric inpatients for seven days from early January ***-one inpatients who developed first-episode psychiatric disorders within two weeks after SARS-CoV-2 infection were recruited,while 24 uninfected first-episode psychiatric inpatients were selected as *** analyses of clinical manifestations,routine laboratory tests,and imaging examinations were *** investigation demonstrated a 330%increase in the incidence of first-episode psychiatric inpatients after SARS-CoV-2 infection in 2023,compared with the preceding year without SARS-CoV-2 *** cases exhibited psychiatric symptoms within one week of SARS-CoV-2 infection,which resolved after approximately two weeks,with no residual symptoms after three ***-way ANOVA demonstrated a significant difference in the highest fever temperature between inpatients with and without psychotic *** inpatients displayed elevated levels of interleukin-4,interleukin-8,and interferon-α,but decreased levels of eosinophils and *** findings suggest that SARS-CoV-2 may contribute to the development of psychiatric disorders,likely mediated by the virus-induced inflammatory response and neuronal dysfunction in the context of psychological distress.

关键词： COVID-19 SARS-CoV-2 psychiatric disorders inflammation interleukins

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Adaptive control design of L2 -disturbance attenuation of multimachine power systems with SMES units by using Hamiltonian function method

Adaptive control design of L2 -disturbance attenuation of mu...

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第二十一届中国控制会议

作者： wang Yu-zhen, LI chun-wen, CHENG Dai-zhan ( Department of Automation, Tsinghua University, Beijing, 100084, China Institute of Systems Science, Chinese Academy of Sciences, Beijing, 100080, China)

＜正＞By using Hamiltonian function method, this paper investigates adaptive control design of L2 -disturbance attenuation of an n -machine power system with m SMES （superconducting magnetic energy storage） units, and proposes a decentralized control scheme for the adaptive case of parameter perturbations. Firstly, the n -machine power system with the m SMES units is expressed as a dissipative Hamiltonian system by using a pre-feedback control. Then the stability of the achieved dissipative Hamiltonian system is studied. Thirdly, this paper investigates the energy-based adaptive control design of L2 -disturbance attenuation of the system with parameter perturbations.

关键词： n -machine power system SMES dissipative Hamiltonian realization L2 - disturbance attenuation energy-based adaptive control

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挥发性盐基氮的光谱分析方法

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光谱学与光谱分析 2009年第8期29卷 2196-2198页

作者：姚焱张平陈永亨田长恩刘文峰汪珍春沈水宝广州大学生命科学学院广东广州510006 广州大学环境科学与工程学院广东广州510006

报道了一种挥发性盐基氮(TVB-N)测定方法。通过奈斯勒试剂处理的分子筛吸收挥发性盐基氮,形成NH2Hg2IO固相显色体,采用漫反射光谱装置直接测定。探讨了测量原理、条件及影响因素,表明该方法具有操作方便,灵敏度高,试剂用量少等优点。方... 详细信息

报道了一种挥发性盐基氮(TVB-N)测定方法。通过奈斯勒试剂处理的分子筛吸收挥发性盐基氮,形成NH2Hg2IO固相显色体,采用漫反射光谱装置直接测定。探讨了测量原理、条件及影响因素,表明该方法具有操作方便,灵敏度高,试剂用量少等优点。方法的线性范围为1～8μg·mL-1,检测限达0.1g·mL-1。用于鱼、肉食品新鲜度的监测,发现鱼肉随放置时间的延长,挥发性盐基氮迅速增加,表明鱼肉的腐败变质是一个加速过程,并且鱼的变质速率相对猪肉更快一些。

关键词：挥发性盐基氮奈斯勒试剂光谱分析法

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电磁轨道炮刨削的形成机理及仿真分析

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高压物理学报 2015年第3期29卷 199-205页

作者：刘峰赵丽曼张晖辉王振春温银堂燕山大学建筑工程与力学学院河北秦皇岛066004 燕山大学国防科技学院河北秦皇岛066004

对电磁轨道炮发射过程中轨道表面的刨削现象进行了研究,根据其发射特点提出了微角度斜冲击引起的刨削形成机理,根据实际轨道炮的结构和载荷特点,应用LS-DYNA有限元软件在不同的参数条件下进行了数值仿真计算。计算表明,随着电枢前端倒... 详细信息

对电磁轨道炮发射过程中轨道表面的刨削现象进行了研究,根据其发射特点提出了微角度斜冲击引起的刨削形成机理,根据实际轨道炮的结构和载荷特点,应用LS-DYNA有限元软件在不同的参数条件下进行了数值仿真计算。计算表明,随着电枢前端倒角的增大轨道的刨削深度减小,电枢的质心位置后移也可以减小刨削深度,并且这些因素对刨削深度的影响并非是线性的。研究结果为进一步抑制轨道刨削现象的发生提供了依据。

关键词：轨道炮刨削 LS-DYNA有限元软件仿真

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An improved method to evaluate trap depth from thermoluminescence

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Journal of Rare Earths 2025年第2期43卷 262-269页

作者： Shiyou Zhang Fangyi Zhao Shengqiang Liu zhen Song Quanlin Liu The Beijing Municipal Key Laboratory of New Energy Materials and Technologies School of Materials Science and EngineeringUniversity of Science and Technology Beijing

Rare earth-doped inorganic compounds contribute mostly to the family of persistent luminescent materials due to the versatile energy levels of rare earth *** of the key research aims is to match the trap level stemming from the doped rare earth ion or intrinsic defects to the electronic structure of the host,and therefore thermoluminescence measurement becomes a radical technology in studying trap depth,which is one of the significant parameters that determine the properties of persistent luminescence and photostimulated ***,the results of trap depth obtained by different thermoluminescence methods are quite different so that they are not ***,we analyzed different thermoluminescence methods,selected and improved the traditional peak position method of Tm/500 to be E=（-0.94Inβ+30.09）*** the experimental heating rate（β） is needed additionally,but the accuracy is improved greatly in most *** convenient and accurate method will accelerate the discovery of novel rare earth-doped materials.

关键词： Persistent luminescence Photostimulated luminescence Rare earths Thermoluminescence Trap depth

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