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Process mineralogy approach to optimize curing-leaching in vanadiumbearing stone coal processing plants

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International Journal of Mining Science and Technology 2023年第1期33卷 123-131页

作者： Hui Li Yuexin Han Jianping Jin Peng Gao zhenya zhou School of Resource and Civil Engineering Northeastern UniversityShenyang 110819China National-Local Joint Engineering Research Center of High-Efficient Exploitation Technology for Refractory Iron Ore Resources Shenyang 110819China

The purpose of this study is to apply process mineralogy as a practical tool to further understand and analyze the reasons for low leaching rates in the curing-leaching process of vanadium-bearing stone coal and to find a solution or improvement to optimize the leaching *** vanadium-bearing stone coal with the V2O5 mass fraction of 0.88%as the research object,the effects of particle size,mineral composition,and sulfuric acid curing on the feed,intermediate,and final products of curing-leaching were *** main vanadium-bearing minerals in the feed samples included sericite/illite,montmorillonite,kaolinite,limonite,and *** the penetration depth analysis of sulfuric acid,the reason for the high vanadium content in the coarse leaching residue(0.205%V2O5)was found,mainly due to the poor curing effect and incomplete washing after ***,thorough washing after sieving and further optimizing the curing process are *** vanadium content of the fine leaching residue(0.078%)was low and the curing-leaching effect was ***,the vanadium content in the thickened residue(0.296%)exceeded that in the fine leaching residue,which was attributed to the neutralization reaction in the#1 *** solve this problem,the neutralization and thickening processes should be performed in separate *** analysis and detection of key products is helpful for identifying problems and improving the curing-leaching circuit process.

关键词： Process mineralogy Vanadium Stone coal Curing-leaching Penetration

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32寸铜镍合金高颈法兰热挤压成形工艺研究

锻压装备与制造技术 2024年第2期59卷 123-127页

作者：郑丛芳周铁柱马俊普周振亚郁炎中国船舶集团有限公司第七二五研究所河南洛阳471023

32寸铜镍合金高颈法兰高度高、底盘大,采用传统锻造后成形工艺材料利用率低;通过分析32寸高颈法兰结构特点,首次提出采用局部镦粗挤压的工艺成形方法,并利用有限元分析软件对法兰成形过程进行了模拟分析,验证了高法兰局部镦粗挤压的可行... 详细信息

32寸铜镍合金高颈法兰高度高、底盘大,采用传统锻造后成形工艺材料利用率低;通过分析32寸高颈法兰结构特点,首次提出采用局部镦粗挤压的工艺成形方法,并利用有限元分析软件对法兰成形过程进行了模拟分析,验证了高法兰局部镦粗挤压的可行性;设计配套模具进行试验验证,完成了32寸高颈法兰的试制;大大降低了产品的生产成本,提高材料利用率。

关键词：铜镍合金高颈法兰模拟分析挤压

Forward to the Special Topic on“Solving Differential Equations with Deep Learning”

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Journal of Systems Science & Complexity 2024年第2期37卷 389-390页

作者： YAN zhenya Academy of Mathematics and Systems Science Chinese Academy of SciencesBeijing 100190China

The concept of artificial intelligence(AI)was first presented at the Dartmouth SummerResearch Project on AI hosted by McCarthy and Minsky in *** that,the developmentof AI has experienced ups and downs due to some limited conditions including intelligentcomputing techniques,computer and hardware and software^([1,2]).In particular,with the rapidof deep artificial neural networks,machine learning(ML)and deep learning(DL)techniques^([3,4])have been applied in many fields of science and engineering,including machine translation,image recognition,genomics,scientific computing and atmospheric science,etc^([5]).

关键词： has artificial hardware

The Sasa-Satsuma equation with high-order discrete spectra in space-time solitonic regions:soliton resolution via the mixed■-Riemann-Hilbert problem

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Communications in Theoretical Physics 2024年第6期76卷 13-25页

作者： Minghe Zhang zhenya Yan KLMM Academy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190China School of Mathematical Sciences University of Chinese Academy of SciencesBeijing 100049China

In this paper,we investigate the Cauchy problem of the Sasa-Satsuma(SS)equation with initial data belonging to the Schwartz *** SS equation is one of the integrable higher-order extensions of the nonlinear Schrödinger equation and admits a 3×3 Lax *** the aid of the■nonlinear steepest descent method of the mixed■-Riemann-Hilbert problem,we give the soliton resolution and long-time asymptotics for the Cauchy problem of the SS equation with the existence of second-order discrete spectra in the space-time solitonic regions.

关键词： Sasa-Satsuma equation inverse scattering ■-Riemann-Hilbert problem ■steepest descent method soliton resolution

Longitudinal vibration characteristics of a tapered pipe pile considering the vertical support of surrounding soil and construction disturbance

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Earthquake Engineering and Engineering Vibration 2024年第1期23卷 51-63页

作者： Li zhenya Pan Yunchao He Xianbin Lv Chong Mohammad Towhid Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering Hohai UniversityNanjing 210098China Geotechnical Research Institute Hohai UniversityNanjing 210098China MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering Zhejiang UniversityHangzhou 310058China

This research is concentrated on the longitudinal vibration of a tapered pipe pile considering the vertical support of the surrounding soil and construction ***,the pile-soil system is partitioned into finite segments in the vertical direction and the Voigt model is applied to simulate the vertical support of the surrounding soil acting on the pile *** surrounding soil is divided into finite ring-shaped zones in the radial direction to consider the construction ***,the shear complex stiffness at the pile-soil interface is derived by solving the dynamic equilibrium equation for the soil from the outermost to innermost *** displacement impedance at the top of an arbitrary pile segment is obtained by solving the dynamic equilibrium equation for the pile and is combined with the vertical support of the surrounding soil to derive the displacement impedance at the bottom of the upper adjacent ***,the displacement impedance at the pile head is obtained based on the impedance function transfer ***,the reliability of the proposed solution is verified,followed by a sensitivity analysis concerning the coupling effect of the pile parameters,construction disturbance and the vertical support of the surrounding soil on the displacement impedance of the pile.

关键词： tapered pipe pile longitudinal vibration vertical support of the surrounding soil construction disturbance displacement impedance

Optimal dispatching strategy for residential demand response considering load participation

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Global Energy Interconnection 2024年第1期7卷 38-47页

作者： Xiaoyu zhou Xiaofeng Liu Huai Liu zhenya Ji Feng Li School of Electrical and Automation Engineering Nanjing Normal UniversityNanjing 210023P.R.China

To facilitate the coordinated and large-scale participation of residential flexible loads in demand response(DR),a load aggregator(LA)can integrate these loads for *** this study,a residential DR optimization scheduling strategy was formulated considering the participation of flexible loads in ***,based on the operational characteristics of flexible loads such as electric vehicles,air conditioners,and dishwashers,their DR participation,the base to calculate the compensation price to users,was determined by considering these loads as virtual energy *** was quantified based on the state of virtual energy storage during each time ***,flexible loads were clustered using the K-means algorithm,considering the typical operational and behavioral characteristics as the cluster ***,the LA scheduling strategy was implemented by introducing a DR mechanism based on the directrix *** simulation results demonstrate that the proposed DR approach can effectively reduce peak loads and fill valleys,thereby improving the load management performance.

关键词： Residential demand response Flexible loads Load participation Load aggregator

Game-theoretic Applications for Decision-making Behavior on the Energy Demand Side:a Systematic Review

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Protection and Control of Modern Power Systems 2024年第2期9卷 1-20页

作者： zhenya Ji Xiaofeng Liu Difei Tang School of Electrical and Automation Engineering Nanjing Normal UniversityNanjingChina School of Electrical and Automation Engineering Nanjing Normal UniversityNanjing 210023China Nanyang Technological University Singapore

As an essential characteristic of the smart grid,energy demand users are being transformed from passive roles to active *** analyze their decision-making behaviors,game theory has been widely applied on the demand *** paper focuses on the classification and in-depth analysis of recent studies that propose game-theoretic approaches for decision optimi-zation of multiple demand *** analysis classifies scenarios into various game participant categories,in-cluding distributed energy prosumers,small-and mid-dle-sized users,and large energy *** in-depth analysis of each scenario,covering non-cooperative game,cooperative game,Stackelberg game,Bayesian game,and evolutionary game,is conducted by analyzing market operation mechanisms,model assumptions/formulations,and solution *** on a comprehensive review of such studies,it is concluded that game-theoretic appli-cations on the demand side can benefit both the grid and the users,e.g.,reductions in the peak-to-average ratios and energy costs of the *** prospects for the ap-plications of game theory on the demand side are dis-cussed,including application scenarios and *** overview presented in this paper is expected to sup-port researchers in comprehending typical game-theoretic concepts,keeping with the latest research developments,and identifying new and innovative appli-cations for the energy demand *** Terms—Energy demand side,game theory,Game-theoretic application,demand response,deci-sion-making behavior.

关键词： Energy demand side game theory Game-theoretic application demand response deci-sion-making behavior

Unveiling the mechanisms of Fe(Ⅲ)-loaded chitosan composite(CTS-Fe)in enhancing anaerobic digestion of waste activated sludge

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Journal of Environmental Sciences 2024年第4期138卷 200-211页

作者： Boaiqi Zhang Ziwen Zhao RuiMa Nan Chen Zhe Kong Zhongfang Lei zhenya Zhang Graduate School of Life and Environmental Sciences University of Tsukuba1-1-1 TennodaiTsukubaIbaraki 305-8572Japan The Key Laboratory of Water and Sediment Sciences Ministry of Education/State Environmental Protection Key Laboratory of All Material Fluxes in River Ecosystems/College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China South China Institute of Environmental Sciences Ministry of Ecology and EnvironmentGuangzhou 510345China School of Water Resources and Environment China University of Geosciences(Beijing)Beijing 100083China School of Environmental Science and Engineering Suzhou University of Science and TechnologySuzhou 215009China

Anaerobic digestion(AD)of waste activated sludge(WAS)is usually limited by the low generation efficiency of ***(Ⅲ)-loaded chitosan composite(CTS-Fe)have been reported to effectively enhanced the digestion of WAS,but its role in promoting anaerobic sludge digestion remains *** present study,the effects of CTS-Fe on the hydrolysis and methanogenesis stages of WAS anaerobic digestion were *** addition of CTSFe increased methane production potential by 8%-23%under the tested conditions with the addition of 5-20 g/L ***,the results demonstrate that the addition of CTS-Fe could effectively promote the hydrolysis of WAS,evidenced by lower protein or polysaccharides concentration,higher soluble organic carbon in rector adding CTS-Fe,as well as the increased activity of extracellular hydrolase with higher CTS-Fe ***,the enrichment of Clostridia abundance(iron-reducing bacteria(IRBs))was observed in CTS-Fe adding reactor(8.9%-13.8%),which was higher than that in the control reactor(7.9%).The observation further suggesting the acceleration of hydrolysis through dissimilatory iron reduction(DIR)process,thus providing abundant substrates for ***,the presence of CTS-Fe was inhibited the acetoclastic and hydrogenotrophic methanogenesis process,which could be ascribed to the Fe(Ⅲ)act as electron acceptor coupled to methane for anaerobic ***,coenzyme F420 activity in the CTS-Fe added reactor was 34.9% lower than in the blank,also abundance of microorganisms involved in hydrogenotrophic methanogenesis was *** from this study could provide theoretical support for the practical applications of CTS-Fe.

关键词： Chitosan-Fe(Ⅲ)composite Methanogenesis Dissimilatory iron reduction Enzyme activity Microbial community structure

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中国禽肉对日出口战略研究

世界农业 2007年第3期 30-33页

作者：周振亚中国农业科学院资源区划研究所

日本是中国禽肉的主要出口国,但从2002年开始中国的禽肉对日出口逐年下降,本文通过分析中国禽肉的生产与出口状况、日本禽肉的进口特点以及竞争国巴西、泰国和美国的禽肉出口状况,研究了中国禽肉对日出口过程中的优势和劣势,提出了中国... 详细信息

日本是中国禽肉的主要出口国,但从2002年开始中国的禽肉对日出口逐年下降,本文通过分析中国禽肉的生产与出口状况、日本禽肉的进口特点以及竞争国巴西、泰国和美国的禽肉出口状况,研究了中国禽肉对日出口过程中的优势和劣势,提出了中国的禽肉出口战略。

关键词：出口战略禽肉中国出口国日本