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Geological division of gas in the Pingdingshan mine area based on its tectonic dynamics characteristics

International Journal of Mining Science and Technology 2015年第5期25卷 827-833页

作者： Lei Dongji Li hui meng hui State Key Laboratory Cultivation Base for Gas Geology and Gas Control Henan Polytechnic University Collaborative Innovation Center of Central Plains Economic Region for Coalbed/Shale Gas State Key Laboratory of Coal Resources and Safe Mining China University of Mining & Technology

In this paper,we used tectonic dynamics theories to study the tectonic evolution characteristics of the Pingdingshan mine area,and analyzed the impact of tectonic progressive control on gas *** study results are as follows:the Pingdingshan mine area has been mainly controlled by multiple squeezing and shearing actions of the Qinling orogenic belt since early and middle Yanshan,forming the tectonic control characteristics of master control in two directions,namely NWW trending and NNE trending;the NWW trending structure is dominated by squeezing and shearing,while the NNE trending structure is dominated by *** controlled by the structure,the gas occurrence presents partition and zonation,*** with the western structure,the eastern NWW-NW trending structure of the mine area is more highly developed,resulting in the mine area gas occurrence distribution characteristics are distinct in the east while indistinct in the *** on this,the mine area can be divided into the following two geological dynamic areas:the western half of mine area,namely the Guodishan fault control area,where the NW-SE trending synchronous tension action suffered by the northeast side(footwall) is relatively strong,and compared with the southwest side(hanging wall),its coal and gas outburst seriousness is weak;and the eastern half of mine area,namely the NWW-NW thrust nappe fracture fold control area,which is a serious area of coal and gas outburst,in particular the axial area of the Likou syncline is the intersection compound and combination position of the NW and NE trending structures,a tectonic concentrated area,and the gas pressure and content here are the largest.

关键词： Tectonic evolution Tectonic environment Dynamic division Tectonic division

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On the Expected Discounted Penalty Function in a Delayed-claims Risk Model

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Acta Mathematicae Applicatae Sinica 2012年第2期28卷 215-224页

作者： hui meng Guo-jing WANG China Institute for Actuarial Science Central University of Finance and Economics Beijing 100081 China Department of Mathematics and Center for Financial Engineering Soochow University Suzhou 215006 China

In this paper, we consider a risk model in which each main claim may induce a delayed claim, called a by-claim. We assume that the time for the occurrence of a by-claim is random. We investigate the expected discounted penalty function, and derive the defective renewal equation satisfied by it. We obtain some explicit results when the main claim and the by-claim are both exponentially distributed, respectively. We also present some numerical illustrations.

关键词： main claim by-claim penalty function generalized Lundberg's equation operator renewalequation

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Identity-based proxy re-encryption scheme from RLWE assumption with ciphertext evolution

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The Journal of China Universities of Posts and Telecommunications 2023年第5期30卷 51-60页

作者： meng hui Ren Lina Zhao Zongqu College of Software Henan Polytechnic UniversityJiaozuo 454000China

Proxy re-encryption(PRE)allows users to transfer decryption rights to the data requester via *** to the current PRE schemes from lattice(LPRE)cannot fulfill chosen-ciphertext attack(CCA)security,an identity-based PRE(IB-PRE)scheme from learning with errors over ring(RLWE)assumption with ciphertext evolution(IB-LPRE-CE)was ***-LPRE-CE generates the private key using the preimage sampling algorithm(SamplePre)and completes the ciphertext delegation using the re-encryption *** addition,for the problem of ciphertext delegation change caused by the long-term secret key update,the idea of PRE is used to complete ciphertext evolution and the modification of ciphertext delegation,which improves the efficiency of secure data *** terms of security,IB-LPRE-CE is CCA security based on RLWE *** with the current LPRE schemes,IB-LPRE-CE offers greater security and improves the computational efficiency of the encryption algorithm.

关键词： proxy re-encryption(PRE) learning with errors over ring(RLWE) chosen-ciphertext attack(CCA) ciphertext delegation ciphertext evolution

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Model Potential Calculations of Oscillator Strength Spectra of Rydberg Li Atoms in External Fields

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Communications in Theoretical Physics 2009年第8期52卷 333-338页

作者： meng hui-Yan SHI Ting-Yun School of Applied Science of Taiyuan University of Science and Technology Taiyuan 030024 China State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and Mathematics Chinese Academy of Sciences Wuhan 430071 China

By combining the B-spline basis set with model potential (B-spline + MP),we present oscillator strengthspectra of Rydberg Li atoms in external *** photoabsorption spectra are *** the narrow energyranges considered in this paper,the structure of the spectra can be independent of the initial state chosen for a *** results are in good agreement with previous high-precision experimental data and theoretical calculations,where the R-matrix approach together with multichannel quantum defect theory (R-matrix+MQDT) was *** issuggested that the present methods can be applied to deal with the oscillator strength spectra of Rydberg atoms incrossed electric and magnetic fields.

关键词： B-spline spectra

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Analytical measurement method for situation elements' dynamic characteristics

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Journal of Systems Engineering and Electronics 2017年第6期28卷 1126-1132页

作者： huiyun Zhao Dongge Zhang hui meng Jiuyang Tao College of Command and Control System Army Engineering UniversityNanjing 210007China Military Representative Office of Taiyuan Railway Bureau Taiyuan 030013China Department of Information Operation&Command Training National Defense UniversityBeijing 100091China

This paper gives an analysis of the dynamic characteristics of situation elements(SEs) in situation awareness(SA)research. The purpose of the discussion is to understand the factors that influence SA and to help in designing the training systems to improve operators’ SA. The status function of SEs is defined and the derivative of the function represents trends of the status of SEs at each moment. Then, Fourier transform(FT) is used to give the frequency-domain function in terms of the time-domain status function. In frequency domain, the bandwidth of the status function is used as a criterion to characterize the notion of "fast" and"slow" of the change of SE’s status, which represents the dynamic characteristic of SEs. The criterion constitutes the first analytical measurement of the dynamic characteristic of SEs, which is one of the important factors that influence the SA process.

关键词： situation awareness(SA) furious transform(FT) situation elements(SEs) status value

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Crystallization behavior of plasma-sprayed lanthanide magnesium hexaaluminate coatings

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International Journal of Minerals,Metallurgy and Materials 2014年第12期21卷 1247-1253页

作者： Liang-liang Huang hui-min meng Jing Tang Corrosion and Protection Center University of Science and Technology Beijing

LaMgAl11O19 thermal barrier coatings （TBCs） were prepared by atmospheric plasma spraying. The crystallization behavior of the coatings and the synthesis mechanism of LaMgAl11O19 powders were researched. The results showed that the plasma-sprayed coatings conmined some amorphous phase, and LaMgAl11O19 powders were partially decomposed into Al2O3, LaAlO3, and MgAl2O4 in the plasma spraying process. The amorphous phase was reerystallized at a temperature of approximately 1174.9℃, at which level the decomposed Al2O3, LaAl2O3, and MgAl2O4 reacted again. The resynthesis temperature of LaMgAl11O19 in the plasma-sprayed coatings was lower than that of LaMgAl11O19 in the original raw powders. The synthesis mechanism of LaMgAl11O19 powders can be summarized as follows： during the first part of the overall reaction, La2O3 reacts with Al2O3 to form LaAl2O3 at approximately 900℃, and then LaAl2O3 further reacts with Al2O3 and MgAl2O4 to produce LaMgAl11O19 at approximately 1200℃.

关键词： thermal barrier coatings hexaaluminates plasma spraying crystallization

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Clinical study on the relationship between liver cirrhosis,ascites,and hyponatremia

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World Journal of Gastrointestinal Surgery 2024年第3期16卷 751-758页

作者： Xuan-Ji Li hui-hui meng Department of Gastroenterology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022Hubei ProvinceChina Department of Hepatology Hubei Provincial Hospital of Traditional Chinese MedicineWuhan 430065Hubei ProvinceChina

BACKGROUND Cirrhosis is a common liver disease,and ascites is one of the common clinical ***,the clinical manifestations of ascites combined with hyponatremia as a high-risk condition and its relationship to patient prognosis have not been fully *** To explore the clinical manifestations,prognostic factors,and relationships of ascites with hyponatremia in patients with cirrhosis to provide better diagnostic and treatment *** In this study,we retrospectively analyzed the clinical data of 150 patients diagnosed with cirrhosis and ascites between 2017 and *** were divided into two groups:ascites combined with hyponatremia group and ascites *** compared the general characteristics,degree of hyponatremia,complications,treatment,and prognosis between the two *** In the study results,patients in the ascites combined with hyponatremia group showed an older average age(58.2±8.9 years),64.4%were male,and had a significantly longer hospitalization time(12.7±5.3 d).Hyponatremia was more severe in this group,with a mean serum sodium concentration of 128.5±4.3 mmol/L,which was significantly different from the ascites group of 137.6±2.1 mmol/*** with ascites and hyponatremia were more likely to develop hepatic encephalopathy(56.2%vs 39.0%),renal impairment(45.2%vs 28.6%)and infection(37.0%vs 23.4%).Regarding treatment,this group more frequently used diuretics(80.8%vs 62.3%)and salt supplements(60.3%vs 38.9%).Multiple logistic regression analysis identified older age[Odds ratio(OR)=1.06,P=0.025]and male gender(OR=1.72,P=0.020)as risk factors for hyponatremia combined with ***,patients with ascites and hyponatremia present a clear high-risk status,accompanied by severe complications and poor *** In patients with cirrhosis,ascites with hyponatremia is a high-risk condition that is often associated with severe complications.

关键词： Liver cirrhosis Ascites Hyponatremia Risk Complications

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Pathogenic changes of community-acquired pneumonia in a children’s hospital in Beijing,China before and after COVID-19 onset:a retrospective study

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World Journal of Pediatrics 2022年第11期18卷 746-752页

作者： Li-Na Zhang Ling Cao Ling-hui meng Department of Pulmonology Children’s HospitalCapital Institute of PediatricsBeijingChina Center for Evidence-Based Medicine Office of Science and TechnologyCapital Institute of PediatricsBeijingChina

Background This study aimed to analyze the pathogenic characteristics of community-acquired pneumonia(CAP)in a children’s hospital before and after the coronavirus disease 2019(COVID-19)pandemic and to provide testimony for preventing CAP in the *** A retrospective analysis was *** information was collected from the electronic medical record system of the hospital.A total of 2739 children were included from February 1,2019,to January 31,*** Among these 2739 patients were 1507(55.02%)males and 1232(44.98%)females;the median age was 3.84 *** were 2364 cases during the pre-COVID-19 period and 375 cases during the post-COVID-19 *** number of hospitalized children after the pandemic was 84.14%*** median age after the onset was 1.5 years younger than that before the onset(4.08 years old)(Z=−7.885,Pbacteria(50.42%)>viruses(29.57%)>fungi(3.43%).During the post-COVID-19 period,the pathogen proportions were bacteria(56.53%)>viruses(53.60%)>MP(23.47%)>fungi(3.73%).Conclusions There was a significant decrease in the number of children with CAP hospitalized after the pandemic,especially among school-age children,and the pathogen proportions of CAP with MP and IV were significantly *** inferred that CAP was effectively prevented in school-age children because of the strong mitigation measures.

关键词： Community-acquired pneumonia Comparison Coronavirus disease 2019 Pathogen

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Prior austenite grain boundary recognition in martensite microstructure based on deep learning

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Journal of Iron and Steel Research International 2023年第5期30卷 1050-1056页

作者： Xuan-dong Wang Nan Li Hang Su hui-min meng Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China Department of Structural Steel Central Iron and Steel Research Institute Co.Ltd.Beijing 100081China Material Digital R&D Center China Iron&Steel Research Institute Group Co.Ltd.Beijing 100081China Central Laboratory Central Iron and Steel Research Institute Co.Ltd.Beijing 100081China

Grain size determination is essential in producing and testing iron and steel *** size determination of martensitic steels usually requires etching with picric acid to reveal the prior austenite grain ***,picric acid is toxic and explosive and belongs to hazardous chemicals,which makes it difficult for laboratories and testing institutions to obtain.A new experimental method was developed to use Nital etchant instead of picric *** deep learning method was used to recognize the prior austenite grain boundaries in the etched martensite microstructure,and the grain size could be determined according to the recognition ***,the polished martensite specimen was etched twice with Nital etchant and picric acid,respectively,and the same position was observed using an optical *** images of the martensitic structure and its prior austenite grain boundary label were obtained,and a data set was ***,based on this data set,a convolutional neural network model with a semantic segmentation function was trained,and the accuracy rate of the test set was 87.53%.Finally,according to the recognition results of the model,the grain size rating can be automatically determined or provide a reference for experimenters,and the difference between the automatic determination results and the measured results is about 0.5 level.

关键词： Prior austenite grain boundary Microstructure etching Image recognition Deep learning

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Lipid accumulation and protein modifications of Bruch’s membrane in age-related macular degeneration

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International Journal of Ophthalmology(English edition) 2021年第5期14卷 766-773页

作者： Li-hui meng You-Xin Chen Department of Ophthalmology Peking Union Medical College HospitalChinese Academy of Medical SciencesBeijing 100730China Key Laboratory of Ocular Fundus Diseases Chinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100730China

Age-related macular degeneration(AMD)is a progressive retinal disease,which is the leading cause of blindness in western *** is an urgency to establish new therapeutic strategies that could prevent or delay the progression of AMD more *** now,the pathogenesis of AMD has remained unclear,limiting the development of the novel ***’s membrane(BM)goes through remarkable changes in AMD,playing a significant role during the disease *** main aim of this review is to present the crucial processes that occur at the level of BM,with special consideration of the lipid accumulation and protein ***,some therapies targeted at these molecules and the construction of BM in tissue engineering of retinal pigment epithelium(RPE)cells transplantation were ***,this review may provide a reference for researchers engaged in pathogenesis or management on AMD.

关键词： Bruch’s membrane lipid accumulation protein modifications therapy

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