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Characterization of 3D pore nanostructure and stress-dependent permeability of organic-rich shales in northern Guizhou Depression,China

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Journal of Rock Mechanics and Geotechnical Engineering 2022年第2期14卷 407-422页

作者： xiaofang jiang Shouchun Deng Haibo Li Hong Zuo State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China University of Chinese Academy of Sciences Beijing100049China

The three-dimensional(3D)pore structures and permeability of shale are critical for forecasting gas production capacity and guiding pressure differential control in practical reservoir ***,few investigations have analyzed the effects of microscopic organic matter(OM)morphology and 3D pore nanostructures on the stress sensitivity,which are precisely the most unique and controlling factors of reservoir quality in *** this study,ultra-high nanoscale-resolution imaging experiments,*** ion beam-scanning electron microscopy(FIB-SEMs),were conducted on two organic-rich shale samples from Longmaxi and Wufeng Formations in northern Guizhou Depression,*** morphology,porosity of 3D pore nanostructures,pore size distribution,and connectivity of the six selected regions of interest(including clump-shaped OMs,interstitial OMs,framboidal pyrite,and microfractures)were qualitatively and quantitatively *** decay permeability(PDP)measurement was used to investigate the variation patterns of stress-dependent permeability and stress sensitivity of shales under different confining pressures and pore pressures,and the results were then used to calculate the Biot coefficients for the two shale *** results showed that the samples have high OM porosity and 85%of the OM pores have the radius of less than 40 *** OM morphology and pore structure characteristics of the Longmaxi and Wufeng Formations were distinctly *** particular,the OM in the Wufeng Formation samples developed some OM pores with radius larger than500 nm,which significantly improved the *** macroscopic permeability strongly depends on the permeability of OM *** stress sensitivity of permeability of Wufeng Formation was significantly lower than that of Longmaxi Formation,due to the differences in OM morphology and pore *** Biot coefficients of 0.729 and 0.697 were obtained for the Longmaxi and Wufeng Formations,respectively.

关键词： Focused ion beam scanning electron microscopy(FIB-SEM) Three-dimensional(3D)reconstruction Pulse decay permeability(PDP) Stress sensitivity Wufeng-Longmaxi formation

Apoptosis in suspension culture of tobacco cells induced by heat shock

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Chinese Science Bulletin 1999年第12期44卷 1101-1106页

作者： Haoming Chen Changhui Yan xiaofang jiang Yaoren Dai Tsing Hua Univ Dept Biol Beijing 100084 Peoples R China

The induction of apoptosis in suspension culture of tobacco cells by heat shock is reported for the first time. Heat treatment (48℃ for 4 h) of tobacco cells led to the appearance of typical hallmarks of apoptosis. It was demonstrated by DNA laddering analysis that the cells treated with heat shock at 48℃ for 4 h had a serious degradation of nuclear DNA into multi-nu-cleosomal sizes, suggesting that heat shock activated endogenous nuclease which led to DNA cleavage at the linkage sites between the nucleosomes, but ladders were very faint for DNA from 2 and 9 h heat-treated cells. The terminal deoxynucleotidyl transferase (TdT)-mediated dUTP nick end labelling (TUNEL) detection also showed that most of these treated cells (48℃ for 4 h) displayed positive reactions, indicating a serious DNA 3’-OH cleavage in their nuclei. Moreover, some other cytological changes in apoptotic cells, such as cell shrinkage, chromatin aggregation, nucleus collapse, have also been observed by 4’,

关键词： apoptosis DNA ladder TUNEL Nicotiana tabacum .

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电弧炉低碳高效智能冶炼技术进步及展望

钢铁 2024年第9期59卷 167-183页

作者：陈兆平田博涵蒋晓放武文合魏光升朱荣宝山钢铁股份有限公司中央研究院上海大学材料科学与工程学院北京科技大学冶金与生态工程学院

钢铁工业是中国能源消耗和碳排放大户，发展能耗及碳排更少的电弧炉短流程炼钢，是钢铁工业实现“碳达峰、碳中和”的重要抓手，进一步推动电弧炉低碳高效智能冶炼已经成为整个钢铁行业面向未来转型发展的重要内容。分析并阐明了电弧炉... 详细信息

钢铁工业是中国能源消耗和碳排放大户，发展能耗及碳排更少的电弧炉短流程炼钢，是钢铁工业实现“碳达峰、碳中和”的重要抓手，进一步推动电弧炉低碳高效智能冶炼已经成为整个钢铁行业面向未来转型发展的重要内容。分析并阐明了电弧炉低碳、高效、智能冶炼技术所存在的技术瓶颈，介绍了国内外相关工艺技术发展现状及宝钢湛江钢铁零碳示范线及宝钢电弧炉流程生产高品质钢的研究进展，并对电弧炉炼钢技术的未来发展方向进行了展望。截至目前，通过使用绿色原料与能源，降低能耗物耗，强化能量输入，促进熔池内的化学反应与开发相关工艺模型已有效提高电弧炉的低碳化、高效化、智能化水平；但仍然存在着诸多问题，如固态炉料熔化缓慢，终点钢水过氧化严重，钢中有害元素与残余元素难以有效脱除，能量利用效率普遍偏低，在线检测与控制手段缺乏，冶金反应机理尚不明晰等。在未来，随着电弧炉生产原料的多样化与设备的大型化，提高电弧炉能量效率，增强熔池搅拌效果，改良炉渣反应性与发泡性等单元技术的重要性应得到进一步重视，对电弧炉生产流程与配套装备的优化需要进一步推进，开发一系列检测技术和适用于绿色原料的生产模型，成为实现电弧炉低碳高效智能冶炼的重要目标。推动相关技术进步，实现大型电弧炉绿色高效低耗智能生产高品质钢是整个钢铁行业面向未来转型发展的必由之路。

关键词：炼钢电弧炉低碳高效智能

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液压油缸活塞杆耐久分析及优化

农业装备与车辆工程 2024年第3期62卷 145-147页

作者：姜小放张瀚文叶恒波娄底市中兴液压件有限公司湖南娄底417000

为研究旋挖钻机加压油缸的疲劳性能,通过市场调研获取了旋挖钻机加压油缸的一种非常典型的作业工况,测试其压力载荷谱并转换为活塞杆的力载荷谱。根据载荷谱特征,对载荷谱每个作业周期进行拆解分析,得到每个周期包含主卷扬上提、打桩加... 详细信息

为研究旋挖钻机加压油缸的疲劳性能,通过市场调研获取了旋挖钻机加压油缸的一种非常典型的作业工况,测试其压力载荷谱并转换为活塞杆的力载荷谱。根据载荷谱特征,对载荷谱每个作业周期进行拆解分析,得到每个周期包含主卷扬上提、打桩加压、憋压、泄压回转下放4个过程。基于载荷分解得到的单周期动态载荷谱,利用有限元仿真和疲劳分析,对加压油缸活塞杆进行疲劳寿命分析预测,反映实际工况下活塞杆的预测疲劳寿命及风险区域,为后期结构优化提供参考。

关键词：桩机油缸活塞杆载荷谱疲劳分析

培训者培训模式在护士健康教育能力培养中的效果评价

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中国高等医学教育 2024年第8期 24-25页

作者：蒋小芳杨丽黎鲜雪梅钱颖浙江大学医学院附属邵逸夫医院浙江杭州310016

目的:探讨培训者培训模式在临床护士健康教育能力培养中的应用效果。方法:选择某三甲医院两个院区临床护士作为培训对象,分别作为对照组和试验组。对照组865名临床护士采用传统教学法,试验组1246名临床护士采用培训者培训模式。结果:试... 详细信息

目的:探讨培训者培训模式在临床护士健康教育能力培养中的应用效果。方法:选择某三甲医院两个院区临床护士作为培训对象,分别作为对照组和试验组。对照组865名临床护士采用传统教学法,试验组1246名临床护士采用培训者培训模式。结果:试验组护士健康教育能力总分与教育评估与计划、教育实施和教育评价3个维度的得分高于对照组,差异有统计学意义(P<0.05)。结论:培训者培训模式能够有效提高临床护士的健康教育能力。

关键词：在职培训护士培训者培训回授法健康教育

Construction of a cell-free system using extracts from apoptotic plant cells

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Chinese Science Bulletin 1999年第16期44卷 1494-1497页

作者： Jun Zhou Haoming Chen xiaofang jiang Haizhen Zhu Yaoren Dai Tsing Hua Univ Dept Biol Beijing 100084 Peoples R China Peking Univ Coll Life Sci Beijing 100871 Peoples R China

To study the mechanism of plant apoptosis, a cell-free system has been developed using the extracts prepared from tobacco cells that become committed to apoptosis induced by heat shock treatment. Tobacco nuclei have displayed such characteristics of apoptosis as nucleus condensation and formation of apoptotic bodies during incubation in this system. Besides, these morphological changes are accompanied by DNA fragmentation, which is detected

关键词： apoptosis cell-free system protease protease inhibitor.

子午流注腕踝针疗法防治化疗所致恶心呕吐的效果研究

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护理管理杂志 2024年第2期24卷 180-184页

作者：蒋晓芳何竹陈曦陈莉李露霞张倩四川省乐山市中医医院护理部 614000 四川省乐山市中医医院行政办公室 614000 四川省乐山市中医医院肿瘤科 614000

目的探讨子午流注腕踝针疗法防治化疗所致恶心呕吐的临床效果。方法选取接受静脉化疗的肿瘤患者212例住院患者随机分为观察组107例、对照组105例。对照组采用常规护理方法,观察组在对照组的基础上给予腕踝针干预治疗。观察化疗后所致恶... 详细信息

目的探讨子午流注腕踝针疗法防治化疗所致恶心呕吐的临床效果。方法选取接受静脉化疗的肿瘤患者212例住院患者随机分为观察组107例、对照组105例。对照组采用常规护理方法,观察组在对照组的基础上给予腕踝针干预治疗。观察化疗后所致恶心呕吐发生率、严重程度、焦虑抑郁、日常生活能力。结果观察组患者化疗后第6天恶心呕吐发生率、严重程度、焦虑抑郁低于对照组(P<0.01),观察组患者化疗后第6天日常生活能力高于对照组(P<0.01)。结论子午流注腕踝针疗法可有效降低化疗所致肿瘤患者恶心呕吐发生率及严重程度,缓解焦虑情绪,提高生存质量具有较好的临床效果。

关键词：化疗恶心呕吐子午流注腕踝针

The development and future of steelmaking technology at Baosteel

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Baosteel Technical Research 2008年第3期2卷 14-23页

作者： Hou Angui jiang xiaofang Steelmaking Plant Baosteel Branch Baoshan Iron ＆ Steel Co. Ltd. Shanghai 200941 China

Baosteel＇s steelmaking has developed greatly over the last 30 years in the areas of hot metal pretreatment, converter, electric arc furnace （EAF）, secondary refining, continuous casting, stainless steel and the comprehensive utilization of resources. The development of technologies, such as clean steel production, mhrstahl heraeus （RH） vacuum refining,a breakout prediction system for slab continuous casting and rotary cylinder slag treatment has created a good environment for the development of value-added products and the comprehensive utilization of resources at Baosteel. This paper describes the direction of development of Baosteel＇ s steelmaking in the future.

关键词： steelmaking comprehensive utilization of resources continuous casting secondary refining

Review of the Tuned Mass Damper Inerter(TMDI)in Energy Harvesting and Vibration Control:Designs,Analysis and Applications

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Computer Modeling in Engineering & Sciences 2024年第6期139卷 2361-2398页

作者： xiaofang Kang Qiwen Huang Zongqin Wu Jianjun Tang Xueqin jiang Shancheng Lei School of Civil Engineering Anhui Jianzhu UniversityHefei230601China Key Laboratory of Intelligent Underground Detection Technology Anhui Jianzhu UniversityHefei230601China Chengnan College Changsha University of Science and TechnologyChangsha410015China

Tuned mass damper inerter(TMDI)is a device that couples traditional tuned mass dampers(TMD)with an inertial *** inertial device produces resistance proportional to the relative acceleration at its two ends through its“inertial”*** to its unique mechanical properties,TMDI has received widespread attention and application in the past twenty *** different configurations are required in different practical situations,TMDI is still active in the research on vibration control and energy harvesting in *** paper provides a comprehensive review of the research status of *** work first examines the generation and important vibration control characteristics of ***,the energy harvesting performance of electromagnetic tuned mass damper inerter(EM-TMDI)is *** work emphasizes the formation of a passive dynamic vibration absorber by coupling traditional TMD with inertial *** paper also summarizes the design and implementation of optimal vibration control and energy harvesting for ***,this paper details the applications of TMDI in the fields of bridges and building ***,this paper summarizes the necessity of research on tuned mass-damper-inertia,the challenges faced currently,and future research directions,such as control of parameters in electromagnetic energy harvesting TMDI systems and low-cost TMDI.

关键词： TMDI EM-TMDI energy harvesting vibration control inertial device