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Characteristics of coal resources in China and statistical analysis and preventive measures for coal mine accidents

International Journal of Coal Science & Technology 2023年第2期10卷 45-57页

作者： chaolin Zhang Peizhong Wang Enyuan Wang Dapeng Chen Chao Li Key Laboratory of Gas and Fire Control for Coal Mines Ministry of EducationSchool of Safety EngineeringChina University of Mining and TechnologyXuzhou 221116JiangsuChina State Key Laboratory of Coal Resources and Safe Mining China University of Mining and TechnologyXuzhou 221116JiangsuChina Shaanxi Coal Chemical Industry Technology Research Institute Co. LTDXi'an 710054ShaanxiChina

In the process of green and smart mine construction under the context of carbon neutrality,China's coal safety situation has been continuously improved in recent *** order to recognize the development of coal production in China and prepare for future monitoring and prevention of safety incidents,this study mainly elaborated on the basic situation of coal resources and national mining accidents over the past five years(2017-2021),from four dimensions(accident level,type,region,and time),and then proposed the preventive measures based on accident statistical *** results show that the storage of coal resources has obvious geographic characteristics,mainly concentrated in the Midwest,with coal resources in Shanxi and Shaanxi accounting for about 49.4%.The proportion of coal consumption has dropped from 70.2%to 56%between 2011 and 2021,but still accounts for more than half of the ***,the accident-prone areas are positively correlated with the amount of coal *** different levels of coal mine accidents,general accidents had the highest number of accidents and deaths,with 692 accidents and 783 deaths,accounting for 87.6%and 54.64%*** frequency of roof,gas,and transportation accidents is relatively high,and the number of single fatalities caused by gas accidents is the largest,about *** terms of geographical distribution of accidents,the safety situation in Shanxi Province is the most *** the time distribution of coal mine accidents,the accidents mainly occurred in July and August,and rarely occurred in February and ***,the"4+4"safety management model is proposed,combining the statistical results with coal production in *** on the existing health and safety management systems,the manage-ments are divided into four sub-categories,and more specific measures are suggested.

关键词： Resource characteristics Coal mine accidents Security situation Safety 4+4 model Preventive measures

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电解锰渣粉对混凝土孔结构及力学性能的影响

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混凝土与水泥制品 2024年第5期 94-97页

作者：吴锐王超林夏晔张坤贵州大学土木工程学院贵州贵阳550000 北京邮电大学经济管理学院北京100000

研究了电解锰渣粉等质量取代0、10%、20%、30%、40%、50%的水泥对混凝土孔结构和力学性能的影响。结果表明:不同电解锰渣粉掺量试件中大孔、中孔、小孔的连通性均较差,且小孔数量较多;随着电解锰渣粉掺量的增加,试件中的孔隙数量增多,... 详细信息

研究了电解锰渣粉等质量取代0、10%、20%、30%、40%、50%的水泥对混凝土孔结构和力学性能的影响。结果表明:不同电解锰渣粉掺量试件中大孔、中孔、小孔的连通性均较差,且小孔数量较多;随着电解锰渣粉掺量的增加,试件中的孔隙数量增多,孔隙率增大,抗压强度降低,弹性模量基本呈降低趋势;与基准组相比,掺电解锰渣粉试件的应力-应变曲线的压密阶段和峰后失稳破坏阶段明显变长,说明延性有所提高。

关键词：电解锰渣粉混凝土孔结构抗压强度

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西华大学体质不合格学生体质特征及影响因素分析

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体育科学进展 2024年第3期12卷 590-596页

作者：吕超林李宗洋苏焕龙西华大学体育学院四川成都

本研究通过体质测试法及问卷调查法探讨西华大学体质不合格学生体质特征及影响因素,为提高学生体质成绩及培养学生的终身体育健康理念提供参考。方法:对841名男生和1249名女生进行体质测试及问卷调查。结果显示:男女学生体质不合格者在... 详细信息

本研究通过体质测试法及问卷调查法探讨西华大学体质不合格学生体质特征及影响因素,为提高学生体质成绩及培养学生的终身体育健康理念提供参考。方法:对841名男生和1249名女生进行体质测试及问卷调查。结果显示:男女学生体质不合格者在50m跑、立定跳远、坐位体前屈引体向上和体脂率方面均显著低于合格者;文科生的身体素质不合格者是理科生的2.494倍;相对体脂率正常而言,低体脂率者、超重和肥胖者身体素质不合格者是体脂率正常者的6.046、5.422和3.558倍;不吸烟者出现体质率不合格者出现的几率是吸烟者的58.4%;运动负荷也是影响体质的重要因素。结论认为:西华大学体质不合格学生整体主要表现在50m、坐位体前屈、体脂率和长跑成绩不理想,同时男学生引体向上和女学生的仰卧起坐成绩较差。影响体质不合格的因素为文科生、男学生、超重、肥胖及低体脂率、吸烟、每周锻炼时间、强度和次数不达标者,而感染新冠病毒后3月对体质没有显著影响。

关键词：体质体脂率运动负荷西华大学

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电化学置换反应制备石墨烯基纳米无定型锑复合阳极用于高性能钠离子电容器的构筑

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物理化学学报 2024年第5期40卷 24-27页

作者：米超林秦玉莹黄欣莉罗伊杰张志薇王成祥石元昌尹龙卫王儒涛山东大学材料科学与工程学院材料液固结构演变与加工教育部重点实验室济南250061

锑(Sb),因其具有较高的理论比容量(660 mAh·g^(-1))、较低储钠电位(0.5–0.8 V ***/Na^(+))和较高的密度(6.68 g·cm^(-3))等特点,被认为是一种理想的钠离子电容器的阳极材料。然而,在Na^(+)脱嵌过程中,Sb电极会发生较大的体积变化,导... 详细信息

锑(Sb),因其具有较高的理论比容量(660 mAh·g^(-1))、较低储钠电位(0.5–0.8 V ***/Na^(+))和较高的密度(6.68 g·cm^(-3))等特点,被认为是一种理想的钠离子电容器的阳极材料。然而,在Na^(+)脱嵌过程中,Sb电极会发生较大的体积变化,导致其容量快速衰减以及倍率性能变差,阻碍了Sb电极的实际应用。因此,本文提出一种可用于制备锚定在具有碳涂层的二维石墨烯表面的无定型Sb纳米颗粒的电化学置换方法。所制备Sb/石墨烯复合材料具有典型的二维复合结构,可大幅增加与电解液界面接触面积,缩短离子扩散路径,促进离子迁移与电子转移。进一步利用该复合材料作为阳极,自制活性炭作为阴极,构建出一种新型钠离子电容器。研究证实,该钠离子电容器工作电压可达4.0 V,可输出140.75 Wh·kg^(-1)的最大能量密度和12.43 kW·kg^(-1)的最高功率密度。综上,该研究结果可为钠离子储能器件用高容量锑基阳极材料的优化设计提供可借鉴的思路。

关键词：石墨烯锑基阳极电化学置换反应二维复合材料钠离子电容器

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Climate change and China’s mega urban regions

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Frontiers of Structural and Civil Engineering 2010年第4期4卷 418-430页

作者： chaolin GU Sunsheng HAN School of Architecture and Planning Tsinghua UniversityBeijing 100084China Faculty of Architecture Building and PlanningThe University of MelbourneParkville VIC 3010Australia

China’s mega urban regions are focal points of economic development and environmental *** paper positions four mega urban regions(i.e.,the Yangtze River Delta,the Pearl River Delta,the Bohai Bay Area,and the South-eastern Fujian Province)along China’s coast into the national economy and elaborates their development challenges and planning *** urban regions in China are spatial consequences of rapid economic *** deserve close scrutiny and demands for innovative planning responses in order to maintain their key role in driving economic growth but limiting their greenhouse gas emission.

关键词： climate change mega urban region urban planning

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以心肌肥厚为主要临床表现的法布里病母子案例分析

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中国分子心脏病学杂志 2024年第1期24卷 5949-5952页

作者：方超林谭娟王帅肖红艳武汉科技大学医学院武汉亚洲心脏病医院武汉430022 武汉科技大学医学部医学院武汉430081

法布里病(Fabry disease)是一种由GLA基因突变引起的X连锁溶酶体储存障碍,导致α- 半乳糖苷酶A活性缺乏,致使鞘糖脂在体液和全身细胞溶酶体中积累。出现皮肤、周围神经、肾脏、脑、眼、胃肠道及心血管等多器官系统的损害。其中,心脏受... 详细信息

法布里病(Fabry disease)是一种由GLA基因突变引起的X连锁溶酶体储存障碍,导致α- 半乳糖苷酶A活性缺乏,致使鞘糖脂在体液和全身细胞溶酶体中积累。出现皮肤、周围神经、肾脏、脑、眼、胃肠道及心血管等多器官系统的损害。其中,心脏受累的特征性表现为进行性心肌肥厚、心肌纤维化、心律失常和心力衰竭,称为Fabry心肌病,具有心脏猝死的潜在风险^([1])。本文报道以心肌肥厚为主要表现的法布里病母子病例,以提高对法布里病男女性发病的认识。

关键词：心肌肥厚法布里病 α-半乳糖苷酶A

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D180柴油机控制系统匹配性研究

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铁道机车车辆 2024年第5期44卷 53-58页

作者：徐朝林蔡志伟王楠戚松岐宋杨范家科中车大连机车车辆有限公司机车开发部辽宁大连116022

以D180高速柴油机在FXN3机车上进行装机性能验证为设计输入,从微机控制系统与D180柴油机的匹配性角度出发,通过D180柴油机在不同运用场景下的需求分析,结合D180柴油机采用二级增压技术的工作特性,设计了柴油机功率与转速控制策略;通过... 详细信息

以D180高速柴油机在FXN3机车上进行装机性能验证为设计输入,从微机控制系统与D180柴油机的匹配性角度出发,通过D180柴油机在不同运用场景下的需求分析,结合D180柴油机采用二级增压技术的工作特性,设计了柴油机功率与转速控制策略;通过与同等功率等级MTU高速柴油机水温控制指标对比,设计了以高温水为主、中冷水为辅的冷却系统控制策略;通过与MTU柴油机在保护系统设计理念上的对比,设计了以微机控制系统为主的判定柴油机功率调节类保护的控制策略,同时通过相关专项试验和长期现场运用验证了控制系统与D180柴油机的高度匹配性。

关键词： D180柴油机微机控制系统冷却系统柴油机保护适配性

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层理页岩单轴压缩下的声发射分形特征研究

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土工基础 2024年第3期38卷 562-566页

作者：田耕王超林郑坤唐伟贵州大学土木工程学院贵阳550025

研究不同角度层理页岩的力学特征,通过合理的监测技术检测层理页岩裂缝失稳过程,对保证页岩气的生产效率和钻井作业的稳定性具有重要意义。对含不同角度层理的页岩试样进行了单轴压缩试验,并采用声发射监测技术记录页岩破裂过程。试验... 详细信息

研究不同角度层理页岩的力学特征,通过合理的监测技术检测层理页岩裂缝失稳过程,对保证页岩气的生产效率和钻井作业的稳定性具有重要意义。对含不同角度层理的页岩试样进行了单轴压缩试验,并采用声发射监测技术记录页岩破裂过程。试验结果表明:层理页岩单轴抗压强度具有较强的各向异性特征,随着层理角的增大,单轴抗压强度呈现先减小后增大的趋势;不同角度层理页岩的单轴压缩破坏类型具有明显的差异性,角度为0°和90°时破坏类型主要为张拉破坏,角度为30°和60°时破坏类型主要为剪切破坏;基于分形理论的声发射时间序列关联维数D可以很好地表征层理页岩内部损伤破坏的发展演化规律,关联维数D处于高值状态波动,表明层理页岩内部主要以形成微裂纹为主,关联维数D急剧下降表明出现了大尺寸裂纹,即关联维数D的急剧下降可以作为层理页岩即将发生失稳破坏的预警信息。

关键词：层理页岩破坏类型声发射关联维数

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Impact of corticosteroids on initiation and half-year durability of humoral response in COVID-19 survivors

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Chinese Medical Journal Pulmonary and Critical Care Medicine 2024年第1期2卷 48-55页

作者： Yeming Wang Li Guo Guohui Fan Yang Han Qiao Zhang Lili Ren Hui Zhang Geng Wang Xueyang Zhang Tingxuan Huang Weiyang Wang Lan Chen Lixue Huang Xiaoying Gu Xinming Wang Jingchuan Zhong Ying Wang Hui Li Jiapei Yu Zhibo Liu chaolin Huang Bin Cao Jianwei Wang National Center for Respiratory Medicine State Key Laboratory of Respiratory Health and MultimorbidityNational Clinical Research Center for Respiratory DiseasesInstitute of Respiratory MedicineChinese Academy of Medical SciencesChina-Japan Friendship HospitalBeijing 100029China National health Commission Key Laboratory of Systems Biology of Pathogens and Christophe Mérieux Laboratory Institute of Pathogen BiologyChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 102629China Key Laboratory of Respiratory Disease Pathogenomics Chinese Academy of Medical SciencesBeijing 100029China School of Population Medicine and Public health Chinese Academy of Medical Sciences&Peking Union Medical CollegeState Key Laboratory of Respiratory Health and MultimorbidityKey Laboratory of Pathogen Infection Prevention and Control(Peking Union Medical College)Ministry of EducationBeijing 100730China National Center for Respiratory Medicine State Key Laboratory of Respiratory Health and MultimorbidityNational Clinical Research Center for Respiratory DiseasesInstitute of Respiratory MedicineChinese Academy of Medical SciencesDepartment of Clinical research and Data managementCenter of Respiratory MedicineChina-Japan Friendship HospitalBeijing 100029China Jin Yin-tan Hospital WuhanHubei 430023China Department of Pulmonary and Critical Care Medicine West China HospitalSichuan UniversityChengduSichuan 610041China Department of Rheumatology and Clinical Immunology Chinese Academy of Medical Sciences&Peking Union Medical CollegeNational Clinical Research Center for Dermatologic and Immunologic Diseases(NCRC-DID)Ministry of Science&TechnologyState Key Laboratory of Complex Severe and Rare DiseasesPeking Union Medical College Hospital(PUMCH)Key Laboratory of Rheumatology and Clinical ImmunologyMinistry of EducationBeijing 100730China Department of Pulmonary and Critical Care Medicine Center of Respiratory MedicineChina-Japan Friendship HospsitalInstitute of Respiratory MedicineChinese

Background:The impact of corticosteroids on humoral responses in coronavirus disease 2019(COVID-19)sur-vivors during the acute phase and subsequent 6-month period remains *** study aimed to determine how the use of corticosteroids influences the initiation and duration of humoral responses in COVID-19 survivors 6 months after infection ***:We used kinetic antibody data from the lopinavir-ritonavir trial conducted at Jin Yin-Tan Hospital in January 2020,which involved adults hospitalized with severe COVID-19(LOTUS,ChiCTR2000029308).Anti-body samples were collected from 192 patients during hospitalization,and kinetic antibodies were monitored at all available time points after ***,plasma samples were collected from 101 COVID-19 survivors for comprehensive humoral immune measurement at the half-year follow-up *** main focus was comparing the humoral responses between patients treated with systemic corticosteroid therapy and the non-corticosteroid ***:From illness onset to day 30,the median antibody titre areas under the receiver operating characteristic curve(AUCs)of nucleoprotein(N),spike protein(S),and receptor-binding domain(RBD)immunoglobulin G(IgG)were significantly lower in the corticosteroids *** AUCs of N-,S-,and RBD-IgM as well as neutralizing antibodies(NAbs)were numerically lower in the corticosteroids group compared with the non-corticosteroid ***,peak titres of N,S,RBD-IgM and-IgG and NAbs were not influenced by *** 6-month follow-up,we observed a delayed decline for most binding antibodies,except N-IgM(𝛽−0.05,95%CI[−0.10,0.00])in the corticosteroids group,though not reaching statistical *** significant difference was observed for ***,for the half-year seropositive rate,corticosteroids significantly accelerated the decay of IgA and IgM but made no difference to N-,S-,and RBD-IgG or ***,corticosteroids group showed a trend towards d

关键词： COVID-19 Corticosteroid Immunity Antibody Humoral response

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Micromorphology of landslide soil Case study on the Jibazi landslide in Yunyang in the Three Gorges Region, China

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Journal of Mountain Science 2006年第2期3卷 147-157页

作者： he Yurong CUI Peng LIAO chaolin ZHANG Baohua ZHAO Yu Chengdu Institute of Mountain Hazards and Environment Chinese Academy of Science ＆ Ministry of Water Conservation Chengdu 610064 China

Abstract： Landslide is one of natural catastrophes affecting national economy and people＇s livelihood. There are many reports on the forming mechanism and control of landslide, but the studies on micromorphology of landslide soil are few. There are many potential landslides in the Three Gorges Region in China. In this paper, the micromorphologic features of the Jibazi landslide soil in Yunyang in the Three Gorges Region of the Yangtze River were studied using routine methods, that is, soil micromorphology, X-ray diffraetometer and scanning electron microscope. The main conclusions are as follow：（1） The basic micromorphologic characteristics of the landslide soil are that the fine soil particles are commonly cohesive matrix, finer and lower content of skeleton grains, the microstructures are mainly types of phenocrystal gelatinization, densely chap and fissure structure. As a result, these micromorphologic features affect the discharging of soil water, favor the movement of landslide body and provide an internal basis of materials for the formation of landslide. （2） The concept on the forming material of landslide was proposed, and types of optical beamed clay aggregates, Fe-Mn isolates and glassy material were found in landslide-belt soil, which were remarkably different from the natural soil formation, and had some scientific significance in analyzing the forming mechanism of landslide and distinguishing me landslide-belt soil. （3） Some special micromorphologic and sub-micromorphologic characteristics, such as fingerprint microstructure, clay beamed bedding microstructure, oppressive microstructure, moulage microstructure and extending hole microstncture, could bring useful micromorphologic evidences for the observation and forecasting of landslide. The results mentioned above will bring helpful micromorphologic evidences for distinguishing slide soil, analyzing the formation mechanism of landslide, and monitoring and forecasting the occurrence of landslide.

关键词： Landslide Microstructure forming material of landslide Three Gorges Region China

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