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mechanism research of gas and coal dust explosion

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Journal of Coal Science & Engineering(China) 2009年第2期15卷 171-174页

作者： ZHANG Yan-song HAN Li-li WANG Lei Chongqing research Institute China Coal Research Institute Chongqing 400037 China School of Civil and Environment Engineering University of Science and Technology Beijing Beijing 100083 China

Combined with the experimental results from the large tunnel of the Chongqingresearch Institute,the mechanism of gas and coal dust explosion was *** about gas and coal dust explosion were introduced such as the form conditionand influential *** and coal dust explosion propagation was researched and thelifting process of coal dust was *** an explosion occurred due to great mixtureof gas and air,the maximum explosion pressure appeared in the neighborhood of theexplosion source *** it propagated to the tunnel of the deposited coal dust,themaximum explosion pressure appeared to be in declining *** of the energy waslost in the process of raising the deposited coal dust through a shock wave,so the maximumexplosion pressure was smallest on the foreside of the deposited coal dust *** the deposited coal dust sector,the explosion pressure rapidly increased and droppedoff after achieving the largest peak *** of coal dust participation in the explosion,the flame velocity rose rapidly on the deposited coal dust and achieved a basic stablevalue;coal dust was ignited to explode by initial laminar flame,and the laminar flametransformed into turbulent *** turbulence transformed the flame fold into a funnelshape and the shock wave interacted with the flame,so the combustion rate rose and thepressure wave was further *** regeneration mechanism between the flamecombustion rate and the aerodynamic flowing structure achieved the final critical state forforming the detonation.

关键词： gas and coal dust explosion mechanism research influence factor coal dust hoisted process

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eScience 2023年第5期3卷 49-68页

作者： Zhengqing Ye Ying Jiang Li Li Feng Wu Renjie Chen Beijing Key Laboratory of Environmental Science and Engineering School of Material Science&EngineeringBeijing Institute of TechnologyBeijing100081China State Key Laboratory of Reliability and Intelligence of Electrical Equipment School of Material Science and EngineeringHebei University of TechnologyTianjin300401China Advanced Technology research Institute Beijing Institute of TechnologyJinan250300China Collaborative Innovation Center of Electric Vehicles in Beijing Beijing100081China

The electrocatalytic sulfur reduction reaction(SRR)and sulfur evolution reaction(SER),two fundamental multistep conversion processes in lithium–sulfur batteries(LSBs),are root-cause solutions to overcome sluggish redox kinetics and the polysulfide shuttling ***–organic framework(MOF)electrocatalysts have emerged as good platforms for catalyzing SRR and SER,but their catalytic performance is challenged by poor electrical conductivity and limited chemical *** MOFs and their hybrids may be beneficial for stabilizing and improving the desired catalytic properties to achieve high-performance *** review provides a detailed overview of engineering principles for improving the activity,selectivity,and stability of MOFrelated electrocatalysts via composition modulation and nanostructure design as well as hybrid *** presents and discusses the various advances achieved by using in situ characterization techniques,simulations,and theoretical calculations to reveal the dynamic evolution of MOF-related electrocatalysts,enabling an in-depth understanding of the catalysis mechanism at the molecular/atomic ***,prospects and possible research directions for MOF-related sulfur electrocatalysts are proposed.

关键词： MOF-related electrocatalysts Sulfur reduction/evolution Composition modulation Structure design mechanism research Lithium-sulfur batteries

A Review of Aftershock mechanism research

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Earthquake research in China 2013年第3期27卷 288-300页

作者： Qu Junhao Jiang Haikun Li Jin Song Jin Institute of Geology China Earthquake Administration Earthquake Administration of Shandong Province China Earthquake Networks Center Earthquake Administration of Xinjiang Uygur Autonomous Region

In this paper,research of aftershock mechanisms is reviewed,including heterogeneity of medium and stress,mechanical loading,fluid intrusion and stress corrosion,and ratestate *** studies have indicated that the heterogeneity of media and stress is the basic premise of aftershocks *** the point view of mechanics,transient creep and afterslip can explain the decay of aftershocks in a short time after a mainshock and the relaxation of stress tends to interpret the characteristics of long-term *** intrusion and stress corrosion control the evolution process of the aftershocks under certain *** interaction between the faults perturbed by the mainshock always exists during the aftershock *** kinds of models and the theories want to comply with the two basic power-law relationships---the G-R law and Omori law to some extent.

关键词： Aftershock sequence mechanism research Medium heterogeneity Stressrelaxation Modified Omori law

The application of label-free imaging technologies in transdermal research for deeper mechanism revealing

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Asian Journal of Pharmaceutical Sciences 2021年第3期16卷 265-279页

作者： Danping Zhang Qiong Bian Yi Zhou Qiaoling Huang Jianqing Gao Institute of Pharmaceutics College of Pharmaceutical SciencesZhejiang UniversityHangzhou 310058China The Third People’s Hospital of Hangzhou Hangzhou 310012China Jiangsu Engineering research Center for New-Type External and Transdermal Preparations Changzhou 213000China

The penetration behavior of topical substances in the skin not only relates to the transdermal delivery efficiency but also involves the safety and therapeutic effect of topical products,such as sunscreen and hair growth *** have tried to illustrate the transdermal process with diversified theories and *** observing the distribution of topical substances on skin by characteristic imaging is the most convincing ***,fluorescence labeling imaging,which is commonly used in biochemical research,is limited for transdermal research for most topical substances with a molecular mass less than 500 ***-free imaging technologies possess the advantages of not requiring any macromolecular dyes,no tissue destruction and an extensive substance detection capability,which has enabled rapid development of such technologies in recent years and their introduction to biological tissue analysis,such as skin *** the specific identification of topical substances and endogenous tissue components,label-free imaging technologies can provide abundant tissue distribution information,enrich theoretical and practical guidance for transdermal drug delivery *** this review,we expound the mechanisms and applications of the most popular label-free imaging technologies in transdermal research at present,compare their advantages and disadvantages,and forecast development prospects.

关键词： Infrared spectroscopy Raman spectrum Mass spectrometry Label-free imaging technology mechanism research

Network Pharmacology in research of Chinese Medicine Formula: Methodology, Application and Prospective

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Chinese Journal of Integrative Medicine 2020年第1期26卷 72-80页

作者： LUO Ting-ting LU Yuan YAN Shi-kai XIAO Xue RONG Xiang-lu GUO Jiao Institute of Traditional Chinese Medicine Guangdong Pharmaceutical UniversityGuangzhou 510006China Guangdong Metabolic Diseases research Center of Integrated Chinese and Western Medicine Guangzhou 510006China School of Pharmacy Shanghai Jiao Tong UniversityShanghai 200240China

Chinese medicine(CM) is usually prescribed as CM formula to treat disease. The lack of effective research approach makes it difficult to elucidate the molecular mechanisms of CM formula owing to its complicated chemical compounds. Network pharmacology is increasingly applied in CM formula research in recent years, which is identified suitable for the study of CM formula. In this review, we summarized the methodology of network pharmacology, including network construction, network analysis and network verification. The aim of constructing a network is to achieve the interaction between the bioactive compounds and targets and the interaction between various targets, and then find out and validate the key nodes via network analysis and network verification. Besides, we reviewed the application in CM formula research, mainly including targets discovery, bioactive compounds screening, toxicity evaluation, mechanism research and quality control research. Finally, we proposed prospective in the future and limitations of network pharmacology, expecting to provide new strategy and thinking on study for CM formula.

关键词： network pharmacology Chinese medicine formula targets discovery mechanism research quality control research

Cancer organoids:A platform in basic and translational research

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Genes & Diseases 2024年第2期11卷 614-632页

作者： Xin Ma Qin Wang Guozheng Li Hui Li Shouping Xu Da Pang Department of Breast Surgery Harbin Medical University Cancer HospitalHarbinHeilongjiang 150081China Sino-Russian Medical research Center Harbin Medical University Cancer HospitalHarbinHeilongjiang 150081China Heilongjiang Academy of Medical Sciences HarbinHeilongjiang 150086China Department of Pharmacology (The State-Province Key Laboratories of Biomedicine-Pharmaceutics of China) College of Pharmacy of Harbin Medical UniversityHarbinHeilongjiang 150086China

An accumulation of previous work has established organoids as good preclinical models of human tumors,facilitating translation from basic research to clinical *** are changing the paradigm of preclinical cancer research because they can recapitulate the heterogeneity and pathophysiology of human cancers and more closely approximate the complex tissue environment and structure found in clinical tumors than in vitro cell lines and animal ***,the potential applications of cancer organoids remain to be comprehensively *** the review,we firstly describe what is currently known about cancer organoid culture and then discuss in depth the basic mechanisms,including tumorigenesis and tumor metastasis,and describe recent advances in patient-derived tumor organoids(PDOs)for drug screening and immunological ***,the present challenges faced by organoid technology in clinical practice and its prospects are *** review highlights that organoids may offer a novel therapeutic strategy for cancer research.

关键词： Drug assays Immunotherapy mechanism research Organoids Precision medicine

How do high-voltage cathode and PEO electrolyte get along well?EIS analysis mechanism&potentiometric control strategy

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Journal of Energy Chemistry 2024年第9期96卷 424-436页

作者： Xiaodong Bai Chaoliang Zheng Heng Zhang Jian Liu Panpan Wang Baojia Xia Jianling Li State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China Shanghai Institute of Microsystem and Information Technology Chinese Academy of SciencesShanghai 201800China

PEO-based all-solid-state electrolytes are extensively utilized and researched owing to their exceptional safety,low-mass-density,and ***,the low oxidation potential of PEO makes the interface problem with the high-voltage cathode extremely *** this work,the impedance of PEO-based all-solid-state batteries with high-voltage cathode(NCM811)was studied at different *** Nyquist plots displayed a gyrate arc at low-frequencies for NCM811/PEO *** on the kinetic modeling,it was deduced that there is a decomposition reaction of PEO-matrix in addition to de-embedded reaction of NCM811,and the PEO intermediate product(dehydra-PEO)adsorbed on the electrode surface leading to low-frequency inductive ***,the distribution of relaxation time shows the dehydra-PEO results in the kinetic tardiness of the charge transfer process in the temporal ***,an artificial interface layer(CEI_(x))was modified on the surface of NCM811 to regulate the potential of cathode/electrolyte interface to prevent the high-voltage deterioration of ***/CEI_(x)/PEO batteries exhibit capacity retentions of 96.0%,84.6%,and 76.8%after undergoing 100 cycles at cut-off voltages of 4.1,4.2,and 4.3 V,***,here the failure mechanism of high-voltage PEO electrolyte is investigated by EIS and a proposed solving strategy is presented.

关键词： PEo-based electrolyte High-voltage cathode Electrochemical impedance spectroscopy mechanism research Electrochemical characteristic

Preparation of High Impermeable and Crack-resistance Chemical Admixture and Its mechanism

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Journal of Wuhan University of Technology(Materials Science) 2002年第2期17卷 70-73,98页

作者：丁庆军 LULin-nu HUShu-guang HEYong-jia WuhanUniversityofTechnology HubeiUniversity

A kind of high impermeable and crack-resistance chemical admixture ( HICRCA) was prepared , which is a compound chemical admixture composed of an expansion ingredient, density ingredient, and organic hydrophobic poreblocking ingredient. The results of the experiments indicate that the addition of HICRCA improves mortar and concrete in the following performances: (1) perfect workability: slump is more than 22cm, theslump afar 3h is about 16cm; (2) high impermeability:for the mortar, the pervious height under a water pressure of 1.5MPa is 1.5cm,for the concrete, the pervious height under a water pressure of 5.0MPa is 2. 2cm;(3) high crack-resistance: there is a micro-expansion at the age of 90d; (4) high compressivestrength: compared with the controlled concrete, the compressive strengths at the age of 3d and 2Sd are improved by 66.4% and 62.0% , respectively. At the same time, the effects of different curing condition on mortar and concrete expansive andshrinkage performance were studied. In addition, the impermeable and crack-resistance mechanism, was investigatedin the present paper.

关键词： concrete high impermeable and crack-resistance chemical admixture curing condition mechanism research

A review on vanadium extraction techniques from major vanadium-containing resources

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Rare Metals 2024年第9期43卷 4115-4131页

作者： Yin-Hui Wang Yi-Fan Wang Yu-Ting Li Chang Wu Xiu-Li Han Ning-Ning Zhao Ze-Kun Zhang Lei Dai Ling Wang Zhang-Xing He College of Mining Engineering North China University of Science and TechnologyTangshan 063210China Collaborative Innovation Center of Green Development and Ecological Restoration of Mineral Resources Tangshan 063210China College of Chemical Engineering North China University of Science and TechnologyTangshan 063009China

The critical role of vanadium in metallurgy and the increasing commercialization of vanadium redox flow batteries have contributed to a rise in market demand for vanadium,emphasizing the need to ensure the sustainability of vanadium *** vanadium slag and stone coal,generated during the smelting process of vanadium–titanium magnetite,serve as primary raw materials for vanadium *** paper reviews the process mineralogy of converter vanadium slag and stone coal,encompassing the chemical and physical phase compositions of the raw materials and the state of vanadium *** aim is to establish a theoretical foundation for the mechanistic study of the vanadium extraction techniques and to provide a reference for the optimization of the process *** paper systematically summarizes the current vanadium extraction technology from converter vanadium slag,covering roasting,direct leaching,sub-molten salt method,and the technology and research status of vanadium extraction from stone *** importantly,it identifies key issues in the current vanadium extraction techniques and challenges faced in actual production,based on the analysis of the current vanadium extraction process and mechanism *** forward feasibility and prospects for the development of vanadium extraction technology are outlined.

关键词： Converter vanadium slag Stone coal Process mineralogy Vanadium extraction process mechanism research