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Reduction behavior of iron ore powder by high-volatile coal in thermogravimetric-gas chromatographic and kinetic analysis

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Journal of Iron and Steel Research International 2024年第1期31卷 92-107页

作者： rui-meng Shi Qi-yuan Mi Bin Li Xiao Shi Chong Zou Jing Guo Han-jie Guo School of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an710055ShaanxiChina China International Engineering Consulting Corporation Beijing100048China School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing100083China

The reduction behavior of iron ore powder by high-volatile coal was investigated,and its kinetic mechanism was *** effect of volatiles in coal on the reduction reaction of iron ore was compared by utilizing a Xinjiang lignite with a high volatile content and its pyrolysis carbon produced by high-temperature pyrolysis to remove volatiles,serving as a *** mass loss and gas composition of the samples during the reduction process were detected using thermo-gravimetric analysis and gas chromatography,and the morphological changes of iron ore powder were observed through scanning electron *** kinetic parameters of the iron oxide reduction reaction were calculated by the Flynn-Ozawa-Wall method,and the kinetic mechanism of volatile participation in the iron oxide reduction reaction was determined through the Coats-Redfern *** results indicate that the coupling effect between the high-volatile coal pyrolysis and reduction reactions occurs during the second stage of the entire coupling process,which corresponds to the late stage of coal pyrolysis with a substantial release of H_(2)and *** volatiles in coal actively participated in the reduction reaction,reducing the initiation temperature of the reaction by around 200℃.The reduction of iron oxides by high-volatile coal was jointly promoted by the"hydrogen cycle"and"carbon cycle",resulting in a higher reduction extent and metallization rate at the end of the *** high-volatile coal was used as the reductant,the average activation energy for the entire process was 76.5 kJ/mol,a significant decrease compared to the employment of pyrolysis carbon without volatiles as the reductant(1167 kJ/mol).

关键词： Direct reduction High-volatile coal Volatile Kinetics Reduction mechanism

A rare-earth spectral traceability anti-counterfeiting detection technology

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Optoelectronics Letters 2022年第9期18卷 535-540页

作者： DONG Jiaoling NI Xiaochang meng rui KONG Weijing LIANG Shuang ZHOU Jie School of Electronic Engineering Tianjin University of Technology and EducationTianjin 300222China

In this paper, a rare-earth spectral traceability anti-counterfeiting detection technology is proposed. Configure rare-earth samples No.1, No.2 and No.3 with different doping ratios. The spectral signals of these three samples are collected and integrated into a sample library. The traceability anti-counterfeiting detection is to compare the spectral information of the samples to be tested with the established sample library by selecting specific wavelength points for light intensity values. If the sample to be measured meets the light intensity range of the established sample library at a specific wavelength point, the sample model will be output. If it does not meet the light intensity range, the sample to be tested is fake. After testing, the anti-counterfeit rate of samples No.1, No.2 and No.3 can reach 100%. This testing process does not destroy the sample, and the anti-counterfeit effect is unique and reliable.

关键词： earth rare spectral

Potential of Steinernema carpocapsae(Weiser) as a biological control agent against potato tuber moth, Phthorimaea operculella(Zeller)(Lepidoptera: Gelechiidae)

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Journal of Integrative Agriculture 2020年第2期19卷 389-393页

作者： YAN Jun-jie Shovon Chandra SARKAR meng rui-xia Stuart REITZ GAO Yu-lin State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193P.R.China College of Agronomy Inner Mongolia Agricultural UniversityHohhot 010019P.R.China Department of Crop and Soil Sciences Malheur County ExtensionOregon State UniversityOntarioOR 97914USA

The entomopathogenic nematode,Steinernema carpocapsae,was evaluated for control of the potato tuber moth,Phthorimaea operculella,under laboratory *** evaluated different concentrations of *** for control of 2 nd,3 rd,and 4 th instar *** median lethal concentration(LC50)of *** infective juveniles(IJs)to 2 nd,3 rd and 4 th instar larvae of *** was 200,363,181 IJs mL–1,*** the extension of treatment time,the cumulative mortality increased for 2 nd,3 rd,and 4 th instar larvae and pupae of *** instars were the most susceptible for all observation ***,our results suggest that *** could be an effective biological control agent for ***.

关键词： Steinernema carpocapsae Phthorimaea operculella patato integrated biological pest control

Aptamer-based Electrochemical Biosensors for Highly Selective and Quantitative Detection of Adenosine

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Chemical Research in Chinese Universities 2008年第2期24卷 138-142页

作者： ZHENG Fan WU Zai-sheng ZHANG Song-bai GUO meng-meng CHEN Chen-rui SHEN Guo-li YU Ru-qin State Key Laboratory for Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha 410082 P. R. China

A new adenosine biosensor based on aptamer probe is introduced in this article. An amino-labeled aptamer probe was immobilized on the gold electrode modified with an o-phenylenediamine electropolymerized film. When adenosine is bound specifically to the aptamer probe, the interface of the biosensor is changed, resulting in the decrement of the peak current. The response current is proportional to the amount of adenosine in sample. The used electrode can be easily regenerated in hot water. The proposed biosensor represents a linear response to adenosine over a concentration range of 1.0x 10^-7-l.0x10^-4 mol/L with a detection limit of 1.0xl0^-8 mol/L. The presented biosensor exhibits a nice specificity towards adenosine. It offers a promising approach for adenosine assay due to its excellent electrochemical properties that are believed to be very attractive for electrochemical studies and electroanalytical applications.

关键词： Adenosine Aptamer Alternating current(AC) voltammetry

Intellicise Model Transmission for Semantic Communication in Intelligence-Native 6G Networks

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China Communications 2024年第7期21卷 95-112页

作者： Wang Yining Han Shujun Xu Xiaodong meng rui Liang Haotai Dong Chen Zhang Ping State Key Laboratory of Network and Switching Technology Beijing University of Posts and TelecommunicationsBeijing 100876China Department of Broadband Communication Peng Cheng LaboratoryShenzhen 518066China

To facilitate emerging applications and demands of edge intelligence(EI)-empowered 6G networks,model-driven semantic communications have been proposed to reduce transmission volume by deploying artificial intelligence(AI)models that provide abilities of semantic extraction and ***,it is not feasible to preload all AI models on resource-constrained ***,in-time model transmission becomes a crucial *** paper proposes an intellicise model transmission architecture to guarantee the reliable transmission of models for semantic *** mathematical relationship between model size and performance is formulated by employing a recognition error function supported with experimental *** consider the characteristics of wireless channels and derive the closed-form expression of model transmission outage probability(MTOP)over the Rayleigh ***,we define the effective model accuracy(EMA)to evaluate the model transmission performance of both communication and *** we propose a joint model selection and resource allocation(JMSRA)algorithm to maximize the average EMA of all *** results demonstrate that the average EMA of the JMSRA algorithm outperforms baseline algorithms by about 22%.

关键词： edge intelligence(EI) model transmission outage probability and accuracy resource allocation semantic communication

Study on critical conditions for rock failure by means of group renormalization

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Journal of Coal Science & Engineering(China) 2009年第1期15卷 50-54页

作者： meng Xiang-rui GAO Zhao-ning WANG Xiang-qian School of Energy Resources and Safety Anhui University of Science and Technology Huainan 232001 China The MOE Key Laboratory of Coalmine Safety and High Efficiency Mining Ministry of Education Huainan 232001 China

A study of the characteristics of the accumulative rock failure and its evolution byapplication of the group renormalization method were presented. In addition, the interactionand long-range correlated effects between the immediate neighboring units was *** concept of mechanical transference for model OFC, employed in the study ofself-organized criticality, and the coefficient a were introduced into the calculation model forgroup renormalization. With the introduction, mechanisms for the drastic increase and decrease of failure intensity of rocks were investigated under similar macro-conditions.

关键词： group renormalization rock failure critical condition

Study on stress distribution and failure criterion of the roof for the severely inclined coal seam under long wall working

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Journal of Coal Science & Engineering(China) 2012年第2期18卷 118-122页

作者： meng Xiang-rui GAO Zhao-ning WANG Xiang-qian School of Energy and Safety Anhui University of Science and TechnologyHuainan 232001China

By turning to the theory of elastic thin plates, a mechanical model of the main roof breaking for severely inclined seam under long wall working was esbalished, in which formulaes were deduced for the calculation of the stress distribution. When the main roof stress distribution was characterized, the failure form of the roof in the long wall coal seam under work was given with the failure criterion deduced. The deduced failure criterion was then applied to the No.3232（3） face of the Li- zuizi Coal Mine; the first pressure for the working face was accurately predicted. Results of the field application show that the main roof of the severely inclined coal seam under long wall working breaks in the O-X pattern, which is basically in accor- dance with the reality.

关键词： stress distribution severely inclined coal seam failure criterion

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Journal of Mountain Science 2018年第5期15卷 1115-1128页

作者： DONG Chun-liang ZHAO Guang-ming LU Xiao-yu meng Xiang-rui LI Ying-ming CHENG Xiang Key Laboratory of Safety and High-efficiency Coal Mining Ministry of Education Anhui University of Science and Technology School of Mechanics and Photoelectric Physics Anhui University of science and Technology School of Mining and Safety Anhui University of Science and Technology

The unloading effect of the excavation of deep roadways has been considerably studied, but most research methods have been limited to numerical simulations and field measurements. Only a few have adopted experimental methods for similar simulations. On the basis of the theory of mechanics,the testing system is designed considering initial geostress and dynamic unloading. The system includes an impact unloading gear and in-situ stress loading equipment, and a designed three-link structure and the impact hammer can effectively realize the dynamic excavation of ***, a cyclic excavation similar simulation experiment on a deep roadway is conducted in a laboratory. The testing system and the relevant monitoring facilities are utilized, and the unloading effect inside the surrounding rock under the cyclic dynamic excavation is studied. Results show that the cyclic dynamic excavation causes significant unloading only in the nearby rock mass, and the unloading indicators show nonlinear ***, when the lateral pressure coefficient is 1.2,the damage is concentrated on both roadsides due to the excavation unloading. Meanwhile, the damage gradually decays as the span increases.

关键词： Excavation unloading in deep roadways Unloading effect Damage of surrounding rock Circular excavation Unloading index

借贷债权应有平等的司法保护——以民间借贷司法解释为样本

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河北法学 2021年第11期39卷 133-142页

作者：孟睿偲张江洪海南省社会治理创新与人才培养研究基地海南571100 河北省沙河市人民检察院河北邢台054199

温州中院的一项判决颠覆了司法实践一以贯之的借贷债权的平等保护,其根源在于《2020民间借贷司法解释》。《2020民间借贷司法解释》明确排除金融借贷的适用,形成金融借贷优越于民间借贷的局面;同时,《2020民间借贷司法解释》以一审受理... 详细信息

温州中院的一项判决颠覆了司法实践一以贯之的借贷债权的平等保护,其根源在于《2020民间借贷司法解释》。《2020民间借贷司法解释》明确排除金融借贷的适用,形成金融借贷优越于民间借贷的局面;同时,《2020民间借贷司法解释》以一审受理时间、起诉时间、借新还旧结算方式作为借贷本息计算的依据,导致相同民间借贷本息不同的结果。平等保护是我国《民法典》的根本原则或帝王原则,是司法解释不可逾越的红线,借贷债权的司法保护不应有违形式平等和实质平等。为此,建议最高人民法院立即修改《2020民间借贷司法解释》,回归借贷债权平等保护的轨道。

关键词：借贷债权平等保护民间借贷金融借贷 2020民间借贷司法解释