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From waste to wealth:Coal tar residue derived carbon materials as low-cost anodes for potassium-ion batteries

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 464-475页

作者： Zhonghua Lu Jun Shen Xin Zhang Lingcong Chao Liang Chen Ding Zhang Tao wei Shoudong Xu College of Chemical Engineering and Technology Taiyuan University of TechnologyTaiyuan 030024China College of Chemistry Taiyuan University of TechnologyTaiyuan 030024China School of Chemical Engineering and Pharmacy Wuhan Institute of TechnologyWuhan 430205China School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang 212003China

Carbon materials are widely recognized as highly promising electrode materials for various energy storage system *** tar residues(CTR),as a type of carbon-rich solid waste with high value-added utilization,are crucially important for the development of a more sustainable *** this study,we employed a straightforward direct carbonization method within the temperature range of 700-1000℃to convert the worthless solid waste CTR into economically valuable carbon materials as anodes for potassium-ion batteries(PIBs).The effect of carbonization temperature on the microstructure and the potassium ions storage properties of CTR-derived carbons(CTRCs)were systematically explored by structural and morphological characterization,alongside electrochemical performances *** on the co-regulation between the turbine layers,crystal structure,pore structure,functional groups,and electrical conductivity of CTR-derived carbon carbonized at 900℃(CTRC-900H),the electrode material with high reversible capacity of 265.6m Ah·g^(-1)at 50 m A·g^(-1),a desirable cycling stability with 93.8%capacity retention even after 100 cycles,and the remarkable rate performance for PIBs were ***,cyclic voltammetry(CV)at different scan rates and galvanostatic intermittent titration technique(GITT)have been employed to explore the potassium ions storage mechanism and electrochemical kinetics of *** indicate that the electrode behavior is predominantly governed by surface-induced capacitive processes,particularly under high current densities,with the potassium storage mechanism characterized by an“adsorption-weak intercalation”*** work highlights the potential of CTR-based carbon as a promising electrode material category suitable for high-performance PIBs electrodes,while also provides valuable insights into the new avenues for the high value-added utilization of CTR.

关键词： coal tar residue carbon materials anode potassium-ion batteries high value-added

Depression mechanism of sulfite ions on sphalerite and Pb^(2+)activated sphalerite in the flotation separation of galena from sphalerite

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 335-345页

作者： Feng Zhang Chenyang Zhang Linlin Wu wei Sun Hongliang Zhang Jianhua Chen Yong Pei Songjiang Li Engineering Research Center of Ministry of Education for Carbon Emission Reduction in Metal Resource Exploitation and Utilization Hunan International Joint Research Center for Efficient and Clean Utilization of Critical Metal Mineral ResourcesSchool of Minerals Processing and BioengineeringCentral South UniversityChangsha 410083China State Key Laboratory of Mineral Processing Beijing General Research Institute of Mining&MetallurgyBeijing 100160China Hunan Provincial Key Laboratory of Micro&Nano Materials Interfaces Science College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China School of Resources Environment and MaterialsGuangxi UniversityNanning 530004China Department of Chemistry Xiangtan UniversityXiangtan 411105China China Railway Resource Group Co.Ltd Beijing 102300China

The depression mechanism of sulfite ions on sphalerite and Pb^(2+)activated sphalerite in the flotation separation of galena from sphalerite still lacked in-depth ***,the depression mechanism of sulfite ions on sphalerite and Pb^(2+)activated sphalerite in the flotation separation of galena from sphalerite was further systematically investigated with experiments and density functional theory(DFT)*** X-ray photoelectric spectroscopy(XPS)results,DFT calculation results,and frontier molecular orbital analysis indicated that sulfite ions were difficult to be adsorbed on sphalerite surface,suggesting that sulfite ions achieved depression effects on sphalerite through other non-adsorption ***,the oxygen content in the surface of sphalerite treated with sulfite ions in creased,which enhanced the hydrophilicity of the sphalerite and further increased the difference in hydrophilicity between sphalerite and ***,sulfite ions were chelated with lead ions to form PbSO_(3)in *** hydrophilic PbSO_(3)was more easily adsorbed on sphalerite than *** interaction between sulfite ions and lead ions could effectively inhibit the activation of *** addition the UV spectrum showed that after adding sulfite ions,the peak of perxanthate in the sphalerite treated xanthate solution was significantly stronger than that in the galena with xanthate solution,indicating that xanthate interacted more readily with sulfite ions and oxygen mo lecules within the sphalerite system,leading to the formation of ***,sulfite ions hardly depressed the flotation of ga lena and could promote the flotation of galena to some *** study deepened the understanding of the depression mechanism o sulfite ions on sphalerite and Pb^(2+)activated sphalerite.

关键词： sphalerite galena sulfite ion density functional theory depression mechanism

Unit panel node detection by CNN on FAST reflector

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Research in Astronomy and Astrophysics 2019年第1期19卷 113-122页

作者： zhi-Song Zhang Li-Chun Zhu wei Tang Xin-yi Li National Astronomical Observatories Chinese Academy of Sciences University of Chinese Academy of Sciences

The Five-hundred-meter Aperture Spherical radio Telescope(FAST) has an active *** observations, the reflector will be deformed into a paraboloid 300 meters in diameter. To improve its surface accuracy, we propose a scheme for photogrammetry to measure the positions of 2226 nodes on the reflector. The way to detect the nodes in the photos is the key problem in this application of photogrammetry. This paper applies a convolutional neural network(CNN) with candidate regions to detect the nodes in the photos. Experimental results show a high recognition rate of 91.5%, which is much higher than the recognition rate for traditional edge detection.

关键词： telescopes FAST photogrammetry nodes detect convolutional neural network

Photocatalysis of InGaN Nanodots Responsive to Visible Light

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Chinese Physics Letters 2011年第5期28卷 214-217页

作者： WANG Lai ZHAO wei HAO zhi-Biao LUO yi Tsinghua National Laboratory for Information Science and Technology/State Key Laboratory on Integrated Optoelectronics Department of Electronic EngineeringTsinghua UniversityBeijing 100084

Photocatalysis of InGaN nanodots grown on GaN/sapphire templates by metal organic vapor phase epitaxy is *** of methylene orange by InGaN nanodots responsive to visible light is *** through atomic force microscopy and time-resolved photoluminescence measurements show that wider bandgap of InGaN,larger specific surface area and more proportion of photocarriers diffusing to the surface before recombination are propitious to photodegradation.

关键词： sapphire dots Photo

Spatiotemporal evolution and driving factors of global production networks:An analysis based on the input-output technique

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Journal of Geographical Sciences 2021年第5期31卷 641-663页

作者： ZHENG zhi CHEN wei LIANG yi ZHANG Yajing Institute of Geographic Sciences and Natural Resources Research CASBeijing 100101China Key Laboratory of Regional Sustainable Development Modeling CASBeijing 100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China Land Consolidation and Rehabilitation Center Ministry of Natural ResourcesBeijing 100035China

Global production networks have become the most important organizational platforms for coordinating international production activities,and their evolution patterns profoundly affect value distribution across the *** this study,we shall firstly carry out an in-depth quantitative research to analyze the patterns and evolution of global production networks,using a long time-sequenced multi-region input-output table and the network analysis *** based on the method of value-added decomposition,we will develop an index system to measure the degree of participation of regions in global production ***,we will try to identify the factors affecting the degree of participation of countries in global production networks by constructing a regression *** results show that from 1995 to 2015,the evolution of global production networks measured by input-output linkages experienced four stages:expansion,contraction,re-expansion,and *** addition,the core communities of global production networks evolved from two major production communities(Europe and the Americas)to three pillars(Europe,Americas,and Asia)while more segmented communities are mainly affected by geographical *** latter consists of European,North American,South American,African and Asian *** evolution of the global production network pattern primarily manifests as a process of cooperation strengthening or weakening among communities,based on changes in the external environment and the need for individual development ***,the United States,Germany,and the United Kingdom have consistently ranked among the top entities in global production networks,whereas China,Russia,and Southeast Asia have the fastest rises in *** addition,government efficiency,resources endowment,infrastructure conditions and technology levels play important roles in the participation in global production networks.

关键词： input-output table network analysis evolution pattern value-added decomposition participation degree indicator system

Carbachol promotes gastrointestinal function during oral resuscitation of burn shock

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World Journal of Gastroenterology 2011年第13期17卷 1746-1752页

作者： Sen Hu Jin-wei Che yi-jun Tian zhi-Yong Sheng Research Laboratory of Shock and Multiple Organ Dysfunction Burns Institute First Hospital Affiliated to the PLA GeneralHospital Beijing 100048 China

AIM: To investigate the effect of carbachol on gastrointestinal function in a dog model of oral resuscitation for burn shock. METHODS: Twenty Beagle dogs with intubation of the carotid artery, jugular vein and jejunum for 24 h were subjected to 35% total body surface area fullthickness burns, and were divided into three groups: no fluid resuscitation (NR, n = 10), in which animals did not receive fluid by any means in the first 24 h postburn; oral fluid resuscitation (OR, n = 8), in which dogs were gavaged with glucose-electrolyte solution (GES) with volume and rate consistent with the Parkland formula; and oral fluid with carbachol group (OR/CAR, n = 8), in which dogs were gavaged with GES containing carbachol (20 μg/kg), with the same volume and rate as the OR group. Twenty-four hours after burns, all animals were given intravenous fluid replacement, and 72 h after injury, they received nutritional support. Hemodynamicand gastrointestinal parameters were measured serially with animals in conscious and cooperative state. RESULTS: The mean arterial pressure, cardiac output and plasma volume dropped markedly, and gastrointestinal tissue perfusion was reduced obviously after the burn injury in all the three groups. Hemodynamic parameters and gastrointestinal tissue perfusion in the OR and OR/CAR groups were promoted to pre-injury level at 48 and 72 h, respectively, while hemodynamic parameters in the NR group did not return to pre-injury level till 72 h, and gastrointestinal tissue perfusion remained lower than pre-injury level until 120 h post-burn. CO 2 of the gastric mucosa and intestinal mucosa blood flow of OR/CAR groups were 56.4 ± 4.7 mmHg and 157.7 ± 17.7 blood perfusion units (BPU) at 24 h postburn, respectively, which were significantly superior to those in the OR group (65.8 ± 5.8 mmHg and 127.7 ± 11.9 BPU, respectively, all P ying and intestinal absorption rates of GES were significantly reduced to the lowest level (52.8% and 23.7% of

关键词： Burn shock Fluid therapy Oral rehydration Carbachol Animal model Gastric emptying Intestinal absorption

EXPERIMENTAL STUDY ON THE SECOND-ORDER DIFFRACTION WAVE PRESSURE AND FORCE ON A CIRCULAR CYLINDER UNDER STOKES WAVE ACTION

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Journal of Hydrodynamics 1993年第2期5卷 94-103页

作者： Zhou, zhi-li Tian, Yong-an Dai, yi-shan Huang, wei-li Harbin Shipbuilding Engineering Inst Harbin China

This paper presents the model test to measure the second-order wave pressure and forces on a circular cylinder fixed in Stokes wave with a given draught. The distributions of second-order oscillating and steady wave pressure on the wet surface of the cylinder and second order oscillating wave forces were obtained in this test, but the second-order steady wave force was not able to be measured due to its very small magnitude. The test results also show that third-order wave force may be greater than the second-order force when wave frequencies are high. The experimental results were compared with the corresponding calculation results of Reference [3].

关键词： Cylinders (shapes) Diffraction Fluid structure interaction Force measurement Hydrodynamics Loads (forces) Mathematical models Pressure effects

Microstructures and coercivity mechanism of 2:17-type Sm-Co magnets with high remanence

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Rare Metals 2022年第4期41卷 1353-1356页

作者： wei Sun Ming-Gang Zhu yi-Kun Fang zhi-ying Liu Zhao-Hui Guo wei Li Division of Functional Materials Central Iron and Steel Research InstituteBeijing 100081China

Sm(Co_(bal)Fe_(0.245)Cu_(0.07)Zr_(0.02))7.8(at%)sintered magnets with high remanence(B_(r)~1.15 T)were prepared using a traditional powder metallurgy *** magnetic properties,especially intrinsic coercivity(H_(cj)),were obtained through adjusting isothermal procedure parameters.H_(cj)of the magnets increases from 305 to 752 kA·m^(-1)with isothermal annealing time increasing from 3 to 20 h,while B_(r) of the magnets almost keeps *** the bright field transmission electron microscopy(TEM)images,it is found that:(1)there is dispersed precipitated phase with very small size in the magnet annealed for 3 h,while the magnets annealed for 20 h have distinct and intact cellular structure;(2)the number density of Z-phase in magnet annealed for 20 h is bigger than that for 3 ***,the finer microstructures were studied with high-resolution transmission electron microscopy(HRTEM).

关键词： Microstructures Coercivity mechanism 2:17-type SmCo permanent magnet

An Empirical Comparison Between Tutorials and Crowd Documentation of Application Programming Interface

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Journal of Computer Science & Technology 2021年第4期36卷 856-876页

作者： yi-Xuan Tang zhi-Lei Ren He Jiang Xiao-Chen Li wei-Qiang Kong School of Software Dalian University of TechnologyDalian 116000China Key Laboratory for Ubiquitous Network and Service Software of Liaoning Province Dalian 116000China School of Computer Science Sz Technology Beijing Institute of TechnologyBeijing 100000China

API(application programming interface)documentation is critical for developers to learn ***,it is unclear whether API documentation indeed improves the API learnability for *** this paper,we focus on two types of API documentation,i.e.,official API tutorials and API crowd ***,we analyze API coverage and check API consistencies in API documentation based on the API ***,we conduct a survey and extract several characteristics to analyze which API documentation can help developers learn *** findings show that:1)API crowd documentation can be regarded as a supplement to the official API tutorials to some extent;2)the concerns for frequently-used APIs between different types of API documentation show a huge mismatch,which may prevent developers from deeply understanding the usages of APIs through only one type of API documentation;3)official API tutorials can help developers seek API information on a long page and API crowd documentation could provide long codes for a particular programming *** findings may help developers select the suitable API documentation and find the useful information they need.

关键词： API documentation empirical study quantitative analysis