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Mechanisms and characteristics of mesocarbon microbeads prepared by co-carbonization of coal tar pitch and direct coal liquefaction residue

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International Journal of Coal Science & Technology 2019年第4期6卷 633-642页

作者： Bingfeng Yan guangyao wang State Key Laboratory of Coal Mining and Clean Utilization Beijing 100013China Beijing Research Institute of Coal Chemistry China Coal Research InstituteBeijing 100013China

DCLR-P was prepared by direct coal liquefaction residue (DCLR) with ash *** the present experiments,mesocarbon microbeads (MCMBs) were prepared by co-carbonization of coal tar pitch (CTP) and *** the increase of DCLR-P content,the yield of MCMBs increased from 47.8% to 56.8%.At the same time,the particle sizes distribution of MCMBs was narrowed,resulting in the decrease of D9o/D10 ratio from 154.88 to *** results showed that DCLR-P had a positive effect on the preparation of MCMBs.1H-NMR,FTIR,SEM and XRD were used to analyze the mechanisms and characteristics of MCMBs prepared by co-carbonization of CTP and *** results showed that the Proton Donor Quality Index (PDQI) of DCLR-P was 13.32,significantly higher than that of CTP (0.83).This indicated that DCLR-P had more naphthenic structure than CTP,which leads to hydrogen transferring in polycondensation *** aliphatic structure of DCLR-P can improve the solubility and fusibility of mesophase,thereby making the structure of MCMBs more *** microstructure of the graphitized MCMBs had a substantially parallel carbon layer useful for its electrical *** performance of graphitized MCMBs as a negative electrode material for Li-ion batteries was *** particle sizes,tap density,specific surface area and initial charge-discharge efficiency of graphitized MCMBs met the requirements of CMB-I in GB/***,the initial discharge capacity of graphitized MCMB was only 296.3 mA h g-1 due to the low degree of graphitization of MCMBs.

关键词： Mesocarbon microbeads Direct coal liquefaction residue Mechanisms Characteristics

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Improved Qualitative Trajectory Calculus for Pair-Activity Analysis

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Journal of Beijing Institute of Technology 2019年第2期28卷 318-326页

作者： Shengsheng wang guangyao wang Yungang Zhu Jingwen Shao College of Computer Science and Technology Jilin University

Trajectory provides the most robust feature for activity recognition in far-field surveillance videos,in which increasing attentions have been given to the use of qualitative methods with symbolic rather than real-value *** trajectory calculus(QTC)showed a good performance in pair-activity from ***,QTC and similar works are not good at dealing with noise,since they are all considering short-term *** deal with the problems mentioned above,two types of long-term features,including sub-trajectory feature and point-trajectory feature,are *** sub-trajectory feature is a long-term feature in a coarse granularity,while the point-trajectory feature is a long-term feature in a relatively fine *** the sub-trajectory feature,a couple of trajectories are segmented into sub-trajectories and enveloping boxes are used to substitute the original sub-trajectory for capturing the major *** point-trajectory feature describes the relationship between a single point in one trajectory and all parts of the other *** experiments on the human activity classification data demonstrated that our proposed methods are better than the original QTC and previous short-term features.

关键词： pair-activity analysis qualitative trajectory calculus sub-trajectory feature point-trajectory feature

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Electrospun nanofibrous membranes with antimicrobial activity for air filtration

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Chinese Chemical Letters 2024年第10期35卷 147-157页

作者： guangyao wang Zhitong Xu Ye Qi Yueguang Fang Guiling Ning Junwei Ye State Key Laboratory of Fine Chemicals and School of Chemical Engineering Dalian University of TechnologyDalian 116012China Engineering Laboratory of Boric and Magnesic Functional Material Preparative and Applied Technology Dalian 116024China

Air pollution,including airborne pathogens and particulate matter(PM),has become a prominent issue affecting human health and *** air filtration materials do not meet the requirements for efficient PM capture or do not instantly kill pathogens,leading to increased risk of direct/indirect contact transmission and infection due to the accumulation of pathogens during *** nanofibrous membranes have emerged as a promising platform due to their rich porous structure,finer fiber diameters,good internal connectivity,and the ability to easily incorporate active chemicals for antimicrobial *** this review,antimicrobial mechanisms of nanofibrous membranes for air filtration and PM capture mechanisms of nanofibers were firstly investigated,and various types of electrospun nanofibrous membranes with different antimicrobial agents for efficient air filtration were described in detail,including organic antimicrobial agents,inorganic antimicrobial agents and metal-organic *** hope this work could provide a better practical insight for designing novel electrospun nanofibrous membranes with antimicrobial efficacy for efficient air filtration.

关键词： Electrospinning Nanofibrous membrane Antimicrobial Particulate matter Airfiltration

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Hybrid Optimization Algorithm Based on Wolf Pack Search and Local Search for Solving Traveling Salesman Problem

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Journal of Shanghai Jiaotong university(Science) 2019年第1期24卷 41-47页

作者： DONG Ruyi wang Shengsheng wang guangyao wang Xinying College of Computer Science and Technology Jilin University Jilin Vocational College of Industry and Technology College of Computer Science and Engineering Changchun University of Technology

Traveling salesman problem(TSP) is one of the typical NP-hard problems, and it has been used in many engineering applications. However, the previous swarm intelligence(SI) based algorithms for TSP cannot coordinate with the exploration and exploitation abilities and are easily trapped into local optimum. In order to deal with this situation, a new hybrid optimization algorithm based on wolf pack search and local search(WPS-LS)is proposed for TSP. The new method firstly simulates the predatory process of wolf pack from the broad field to a specific place so that it allows for a search through all possible solution spaces and prevents wolf individuals from getting trapped into local optimum. Then, local search operation is used in the algorithm to improve the speed of solving and the accuracy of solution. The test of benchmarks selected from TSPLIB shows that the results obtained by this algorithm are better and closer to the theoretical optimal values with better robustness than those obtained by other methods.

关键词： traveling salesman problem(TSP) swarm intelligence(SI) wolf pack search(WPS) combinatorial optimization

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Study on extraction phenol from coal tar with high flux centrifugal extractor

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International Journal of Coal Science & Technology 2017年第4期4卷 333-341页

作者： Yuan Zhao Xuefeng Mao Weilin Li Xiaohui Gu guangyao wang Beijing Research Institute of Coal Chemistry China CoalResearch Institute Beijing 100013 China National Energy Technology and Equipment Laboratory ofCoal Utilization and Emission Control Beijing 100013China State Key Laboratory of Coal Mining and Clean Utilization Beijing 100013 China

Solvent extraction phenol from coal tar were carried out with novel composite YH-3 as extraction agent, and the high flux centrifugal extractor was used as extraction device. Under the premise of high phenol extraction rate, composite YH-3 extraction agent reduces n-n interaction between phenolic compounds and aromatic hydrocarbons, thus decreasing the entrainment of neutral oil. The optimization of operation conditions, such as the diameter of heavy phase weir HWD, the flow ratio, the total flow rate and the rotation speed, are necessary. For single stage extraction experiment, the mass transfer efficiency was up to 84% while the rate of extraction agent loss was lower than 0.28% with the operation conditions of 29 mm of the heavy phase weir diameter （HWD）, 1：1-1.4：1 of the flow ratio range, 160-200 mL/min of the total flow rate and the rotation speed varied from 2200 to 2600 r/min. For three stage counter-current test, the mass transfer efficiency reached up to 92.6% with the optimum operation condition of 29 mm of the HWD, 1：1 of the flow ratio, 200 rnL/min of the total flow rate and 2400 r/rain of the rotation speed. The results indicated that phenol could be extracted effectively from coal tar in the process of multistage continuous count current centrifugal extraction.

关键词： High flux centrifugal extractor Coal tar Phenol Mass transfer efficiency Loss rate

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Responses of breeding waterbird communities to environmental changes in subsidence wetlands in the North China Plain

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Avian Research 2023年第3期14卷 336-344页

作者： guangyao wang Jinming Zhao Weiqiang Li Xiangrong Song Yong Zhang Chunlin Li Willem F.de Boer School of Resources and Environmental Engineering Anhui UniversityHefei230601China School of Life Science Huaibei Normal UniversityHuaibei235000China College of Biology and the Environment Nanjing Forestry UniversityNanjing210037China Anhui Province Key Laboratory of Wetland Ecosystem Protection and Restoration Anhui UniversityHefei230601China Wildlife Ecology and Conservation Group Wageningen University&Research6708PBWageningenthe Netherlands

In the context of global degradation and loss of natural wetlands,waterbirds have been increasingly using artificial wetlands as alternative ***,waterbirds are facing various threats in these artificial wetlands,due to dramatic environmental changes induced by anthropogenic *** the effects of these changes on the temporal dynamics of the waterbird communities can help understand how waterbirds adapt to environmental changes and thus formulate effective management and conservation *** this study,we carried out field surveys on waterbirds and environmental factors across 20 subsidence wetlands created by underground coal mining in the Huainan coal mining area in the breeding seasons of 2016 and *** predicted that the waterbird assemblages(i.e.,number of individuals,species richness,Shannon-Wiener diversity,Pielou evenness and species composition) differed between the two years,and that these differences were correlated with the temporal changes in environmental *** the surveyed wetlands,we recorded 26 waterbird species in 2016 and 23 in *** individual wetlands,the number of waterbird individuals and species richness increased by 71.6% and 20.1%,respectively,over the five years,with no changes in Shannon-Wiener diversity and Pielou *** overall increase in the number of bird individuals was mainly caused by an increase in vegetation gleaners and gulls that adapt well to anthropogenic *** species composition was significantly different between the two years,which was mainly caused by changes in the number of individuals of dominant species under influence of changes in human *** most wetlands,the temporal pairwiseβ-diversities could be explained by species turnover rather than nestedness,probably due to high mobility of waterbird species and dramatic changes in local *** study suggests that waterbird communities could respond to environmental changes in subsidence wetlands,

关键词： Artificial wetlands Environmental changes Subsidence wetlands Waterbird community

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Association of elevated hs-CRP and multiple infarctions with outcomes of minor stroke or TIA: subgroup analysis of CHANCE randomised clinical trial

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Stroke & Vascular Neurology 2021年第1期6卷 80-86页

作者： guangyao wang Jing Jing Jiejie Li Yuesong Pan Hongyi Yan Xia Meng Xingquan Zhao Liping Liu Hao Li David Z wang Yongjun wang Yilong wang Department of Neurology Beijing Tiantan HospitalCapital Medical UniversityBeijingChina China National Clinical Research Center for Neurological Diseases BeijingChina Neurovascular Division Department of NeurologyBarrow Neurological InstituteSt.Joseph's Hospital and Medical CenterPhoenixArizonaUSA

Background and purpose The relationship of high-sensitive C-reactive protein(hs-CRP)levels and infarction numbers with the prognosis of stroke is *** study evaluated the association of different hs-CRP levels and infarction numbers with the prognosis of acute minor ischaemic stroke or transient ischaemic attack(TIA).Methods A subset of 807 patients with both hs-CRP measurement and baseline MRI was included from the Clopidogrel in High-risk Patients with Acute Non-disabling Cerebrovascular Events *** primary efficacy outcome was the occurrence of an ischaemic stroke at the 1-year *** numbers were classified as multiple acute infarctions(MAIs),single acute infarction and no acute infarction(NAI).The association between different hs-CRP levels with different infarction numbers and the risk of any outcome was analysed using multivariable Cox regression *** Among the 807 patients,84(10.4%)patients had a recurrent ischaemic stroke within 1 *** adjustment for conventional confounding factors,patients with both elevated hs-CRP levels and MAIs were associated with approximately 4.7-fold of risk of ischaemic stroke within 1 year(16.7% vs 3.5%,HR 4.68,95% CI 1.54 to 14.23,p=0.007),compared with those with non-elevated hs-CRP levels and *** results were observed for the composite *** Combined elevated hs-CRP levels and MAIs may increase 1-year stroke risk stratification efficiency in patients with minor ischaemic stroke or TIA compared with using those markers alone,which indicated that the combination of inflammatory and imaging markers might improve the effectiveness of risk stratification concerning minor ischaemic stroke or TIA.

关键词： elevated infarction minor

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Application of Insert Chill Iron Melt in Investment Casting

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稀有金属材料与工程 2011年第S3期40卷 23-26页

作者： Xiong guangyao, Zheng Meizhu, wang Yanlin, Zhao Mingjuan, Zhao Longzhi Key Laboratory of Ministry of Education for Conveyance and Equipment, East China Jiaotong University, Nanchang 330013, China E China Jiaotong Univ Key Lab Minist Educ Conveyance & Equipment Nanchang 330013 Peoples R China

The cast-steel creeper tread is a part with complex external surface and internal shape, having a hot spot cased by the uneven wall thickness. As the hot spot is far away from the gating system and the feeding channel is narrow, it is difficult to be fed by setting up a casting head, leading easily to shrinkage and causing great problems for investment casting. In this paper, the qualified castings can be successfully poured by feeding method of insert chill iron melt, smart design and placement process of chill, to realize simultaneous solidification of castings. The shrinkage of creeper tread is solved and the precision of castings is improved. This method exhibits easy operation, excellent feeding effect and simplified gating system to improve yield rate. Furthermore, it could save raw material, reduce waste product and lower product cost by using the insert chill iron melt in investment casting. The production practices showed that the qualified castings can be successfully poured by increasing feeding pressure, placing an internal chill to adjust the temperature of hot junction segments and realizing simultaneous solidification of castings.

关键词： creeper tread investment casting insert chill iron melt feeding

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Study on the algorithm based on the important region of board

Study on the algorithm based on the important region of boar...

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第30届中国控制与决策会议

作者： wang guangyao Liu Hedan Faculty of Automation Shengyang Aerospace University Engineering Training Center Shengyang Aerospace University

Hex is a board game with simple rules and complex strategy. In the recent years, hex is becoming more and more popular.(Hex is a game with simple rules and complex strategies which is becoming more and more popular recent years.) Although we have used Min-max tree search and Alpha-Beta pruning during game, the program still has a difficulty to dealing with some situations well. In this paper, we will instruct(describe) a condition which is difficult to deal with existed in hex. By analyzing this situation we found a special and important area called-and we will apply it to the evaluation function. Our experiment found that we will make program get win easier by using this strategy.

关键词： hex Alpha-beta pruning connected-region

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重油性质对油煤浆表观黏度的影响

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煤炭转化 2022年第2期45卷 74-83页

作者：王光耀煤炭科学技术研究院有限公司煤化工分院北京100013 国家能源煤炭高效利用与节能减排技术装备重点实验室北京100013 煤炭资源高效开采与洁净利用国家重点实验室北京100013

以催化裂解油浆(DCC)、山东渣油(SDR)、中低温煤焦油重馏分(TAR)和塔河渣油(THR)为研究对象,考察了不同条件下油煤浆表观黏度变化规律,研究了油煤浆的流体性质和黏温特性,探讨了制浆过程中不同性质重油对煤的适应性。结果表明:不同性质... 详细信息

以催化裂解油浆(DCC)、山东渣油(SDR)、中低温煤焦油重馏分(TAR)和塔河渣油(THR)为研究对象,考察了不同条件下油煤浆表观黏度变化规律,研究了油煤浆的流体性质和黏温特性,探讨了制浆过程中不同性质重油对煤的适应性。结果表明:不同性质的重油组分差距较大,THR与TAR中饱和脂肪烃含量低,含有大量氢键缔合结构。分析结果表明THR中沥青质的分子母核结构更大,重油胶质体系稳定性差,极易缩聚,在升温过程中容易结焦。煤粉浓度为30%条件下,随剪切速率提高,DCC,SDR和TAR油煤浆体系黏度下降幅度均小于10%,这与三种重油均呈牛顿流体性质有关。添加煤粉增强了THR剪切稀化的能力,黏度下降高达26.80%。四种重油配制的不同浓度油煤浆体系lnμ与1/T线性关系良好,相关系数R^(2)>0.98。在相同温度和煤浆浓度条件下,THR油煤浆体系黏度>SDR油煤浆体系黏度>TAR油煤浆体系黏度>DCC油煤浆体系黏度。SDR与TAR配制的油煤浆黏度适中,且在输送过程中受温度波动影响较小,油煤浆稳定性较高,是比较适宜的制浆原料。

关键词：油煤浆表观黏度重油性质黏温特性剪切速率

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