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Numerical simulation of rock-breaking and influence laws of dynamic load parameters during axial-torsional coupled impact drilling with a single PDC cutter

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Petroleum Science 2023年第3期20卷 1806-1827页

作者： Yan Xi Hao-Yu Wang Chun-Qing zha jun Li gong-Hui Liu Bo-Yun guo Beijing University of Technology Bejing100124China China University of Petroleum-Bejing Beijing102249China China University of Petroleum-Beijing at Karamay KaramayXinjiang834000China University of Louisiana at Lafayett Lafayette70504USA

Axial and torsional impact drilling technology is used to improve the drilling efficiency of hard rock formation in the deep ***,the corresponding theory is not mature,and there are few correlative research reports on the rock-breaking mechanism of axial and torsional coupled impact drilling *** the influence of the impact hammer geometry and movement on the dynamic load parameters(i.e.,wavelength,amplitude,frequency,and phase difference),a numerical model that includes a hard formation and single polycrystalline diamond compact cutter was *** Riedel-Hiermaier-Thoma model,which considers the dynamic damage and strength behavior of rocks,was adopted to analyze the rock damage under axial and torsional impact *** numerical simu-lation results were verified by the experimental *** was found that compared with conventional drilling,the penetration depths of axial,torsional,and axial-torsional coupled impact drilling increased by 31.3%,5.6%,and 34.7%,*** the wavelength and amplitude of the axial impact stress wave improved the penetration *** the bit rotation speed remained unchanged,increasing the frequency in the axial and circumferential directions had little effect on the penetration ***,as the frequency increased,the cutting surface became increasingly smooth,which reduced the occurrence of bit *** the phase difference between the axial and circumfer-ential stress waves was 25%,the penetration depth significantly *** addition,the bit vibration problem can be effectively ***,the adjustment of engineering and tool structure parameters is proposed to optimize the efficiency of the axial-torsional coupled impact drilling tool.

关键词： Axial-torsional coupled impact drilling tool Rock-breaking PDC cutter RHT model

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某化验室酸性废气治理工程设计与应用

有色矿冶 2024年第2期40卷 63-65,54页

作者：郭逸潘熊薪查浔林汉军江西铜业集团有限公司永平铜矿江西上饶334000

根据某化验室酸性废气组成成分,遵从国家环保法律法规、标准规范,设计该化验室酸性废气治理方案。选用离心通风设施收集酸性废气,再选择酸碱中和法处理酸性废气,达标后再排放到大气当中。不仅能够满足日常使用需求,也显著改善周边大气质... 详细信息

根据某化验室酸性废气组成成分,遵从国家环保法律法规、标准规范,设计该化验室酸性废气治理方案。选用离心通风设施收集酸性废气,再选择酸碱中和法处理酸性废气,达标后再排放到大气当中。不仅能够满足日常使用需求,也显著改善周边大气质量,有利于保护员工身心健康。

关键词：环境保护大气污染酸性气体离心风机酸碱中和塔

Selective electrocatalytic CO2 reduction enabled by SnO2 nanoclusters

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Journal of Energy Chemistry 2019年第10期28卷 93-96页

作者： Hui Yang Yang Huang jun Deng Yunling Wu Na Han Chenyang zha Leigang Li Yanguang Li Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices Institute of Functional Nano & Soft Materials (FUNSOM) Soochow University

The development of high-performance electrocatalysts holds the decisive key to the electrochemical CO2 reduction toward value-added products. Formic acid or formate is a desirable reduction product, but its selective production is often challenging. Tin based-materials have attracted great attention for formate production, and yet their performances are far from satisfactory. In this study, we reported the preparation of SnO2 nanoclusters from the controlled self-polymerization of dopamine together with SnO32-, followed by the mild-temperature calcination. The final product consisted of large primary particles that were further made of small secondary SnO2 nanocrystals. When evaluated as the electrocatalyst for CO2 reduction in 0.5 M NaHCO3, our material exhibited impressive activity, selectivity and stability for the selective CO2 reduction to formate. A peak formate Faradaic efficiency of^73% and large partial current density of 16.3 mA/cm2 was achieved at -0.92 V versus reversible hydrogen electrode.

关键词： CO2 reduction reaction Electrocatalysts Formate Tin oxide Selectivity

导师对当代研究生思想政治教育的作用及教育路径

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兵团教育学院学报 2024年第3期34卷 13-16页

作者：朱研丁成查鑫宇张振军石河子大学党委学生工作部(学生处) 新疆石河子832003

研究生作为我国最高学历人才,其思想政治教育效果直接影响着当代社会文明和个人的进步与发展,导师作为研究生思政教育的第一责任人,在全面推进高校全员育人体系建设及研究生思想政治素质培育方面发挥着至关重要的作用。当代研究生思想... 详细信息

研究生作为我国最高学历人才,其思想政治教育效果直接影响着当代社会文明和个人的进步与发展,导师作为研究生思政教育的第一责任人,在全面推进高校全员育人体系建设及研究生思想政治素质培育方面发挥着至关重要的作用。当代研究生思想政治教育工作需不断提升导师教育的影响力,充分发挥研究生导师的思政教育功能。

关键词：导师研究生思想政治教育影响

特发性肺纤维化的发病机制及中药调节作用研究进展

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中国实验方剂学杂志 2024年第10期30卷 280-289页

作者：邹恩国黄天宇王木兰查晨亮龚琴朱卫丰冯育林刘良徛李俊江西中医药大学南昌330006 江西中医药大学中药固体制剂制造技术国家工程研究中心南昌330006 江西中医药大学附属医院南昌330006

特发性肺纤维化(IPF)作为一种肺部进行性疾病,预后不佳,目前尚无可靠手段进行根治。当下治疗IPF以器官移植和给予化学药为主,但效果欠佳且不良反应颇多,无法满足目前的临床需求。因此,开发更安全、有效的药物已成为亟需解决的问题,而研... 详细信息

特发性肺纤维化(IPF)作为一种肺部进行性疾病,预后不佳,目前尚无可靠手段进行根治。当下治疗IPF以器官移植和给予化学药为主,但效果欠佳且不良反应颇多,无法满足目前的临床需求。因此,开发更安全、有效的药物已成为亟需解决的问题,而研究IPF的发病机制将有助于新药的开发。现阶段关于IPF发病机制的研究主要集中在巨噬细胞极化、上皮-间质转化(EMT)、氧化应激和自噬作用等方面,但对于系统说明各发病机制原理及揭示各机制存在的联系尚未有研究报道。中医理论认为“气虚血瘀”“气阳虚弱”是IPF的关键病机,故临床常采用益气活血、温阳补气和祛瘀化痰类等中药或复方治疗IPF。现代药理学研究表明,此类中药在抑制巨噬细胞极化、改善氧化还原平衡、抑制EMT和调节细胞自噬等方面可发挥积极作用,但针对中药如何调节相关通路而治疗IPF,目前尚无系统的报道。该文通过总结国内外最新文献,将逐一并系统的阐述IPF的发病机制,同时更全面的概述中药中有效成分或复方调节IPF的作用机制。针对IPF的发病机制,结合中药的调节作用,着重挖掘系统治疗IPF的方案,以期为IPF的深入研究及相关药物研发提供新的思路。

关键词：特发性肺纤维化(IPF) 发病机制中药作用机制巨噬细胞极化上皮-间质转化(EMT) 氧化应激自噬

The scanning tunneling microscopy and spectroscopy of gaSb_(1-x)Bi_(x) films of a few-nanometer thickness grown by molecular beam epitaxy

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Journal of Semiconductors 2021年第9期42卷 42-46页

作者： Fangxing zha Qiuying zha.g Haoguang Dai Xiaolei zha.g Li Yue Shumin Wang jun Shao Physics Department Shanghai UniversityShanghai 200444China Shanghai Institute of Microsystem and Information Technology Chinese Academy of SciencesShanghai 200050China School of Information Science and Technology Shanghai Tech UniversityShanghai 201210China Department of Microtechnology and Nanoscience Chalmers University of Technology41296 GothenburgSweden National Laboratory for Infrared Physics Shanghai Institute of Technical PhysicsChinese Academy of SciencesShanghai 200083China

The ultrahigh vacuum scanning tunneling microscope(STM)was used to characterize the gaSb_(1-x)Bi_(x) films of a few nanometers thickness grown by the molecular beam epitaxy(MBE)on the gaSb buffer layer of 100 nm with the gaSb(100)*** thickness of the gaSb_(1-x)Bi_(x) layers of the samples are 5 and 10 nm,*** comparison,the gaSb buffer was also characterized and its STM image displays terraces whose surfaces are basically atomically flat and their roughness is generally less than 1 monolayer(ML).The surface of 5 nm gaSb_(1-x)Bi_(x) film reserves the same terraced morphology as the buffer *** contrast,the morphology of the 10 nm gaSb_(1-x)Bi_(x) film changes to the mound-like island structures with a height of a few *** result implies the growth mode transition from the two-dimensional mode as displayed by the 5 nm film to the Stranski-Krastinov mode as displayed by the 10 nm *** statistical analysis with the scanning tunneling spectroscopy(STS)measurements indicates that both the incorporation and the inhomogeneity of Bi atoms increase with the thickness of the gaSb_(1-x)Bi_(x) layer.

关键词： scanning tunneling microscopy molecular beam epitaxy semiconductor surface

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北京八达岭林场人工林生态服务功能评估

北京师范大学学报（自然科学版） 2024年第2期60卷 224-232页

作者：毛军王立平高永龙姚永刚隗骥超李卫兵田赟刘鹏查天山北京林业大学水土保持学院北京北京市八达岭林场管理处北京北京市园林绿化规划和资源监测中心北京北京绿林盛源绿化工程有限公司北京

人工林生态服务功能评估是应用生态学领域研究的热点,也是数字生态和林业高质量发展的需求.本文以北京市八达岭林场人工林生态系统(混交林、针叶林、阔叶林)和天然灌木林为研究对象,以北京市森林资源规划设计调查资料(2004、2009、2014... 详细信息

人工林生态服务功能评估是应用生态学领域研究的热点,也是数字生态和林业高质量发展的需求.本文以北京市八达岭林场人工林生态系统(混交林、针叶林、阔叶林)和天然灌木林为研究对象,以北京市森林资源规划设计调查资料(2004、2009、2014年)和八达岭林场碳通量实时监测为基础数据源,通过野外调查及典型样方观测,开展人工林生态服务功能评价,旨在探究森林生态系统结构优化和功能提升的森林经营建议.结果表明:1)2004−2014年八达岭林场针叶林和灌木林面积增长率分别为40.48%和3.32%,而阔叶林和混交林分别减少46.33%和3.57%,林场仍以混交林(703 hm^(2))和灌木林(1182 hm^(2))为主.2)2004−2014年阔叶林中椴树逐渐成为主要树种,2014年涵养水源量较2009年提高了1.55倍.油松作为混交林的优势树种,其涵养水源实物量2014年较2004年提高了67%.灌木林在2014年出现了较大幅度增加,涵养水源实物量较2004年提高了1倍左右,其价值量也相应增加.固碳、释氧、提供负氧离子、滞尘和吸收污染物等调节服务功能及其价值均表现为混交林最高,针叶林次之,阔叶林最低(P>0.05);各林分服务功能价值量与功能实物量变化趋势相同,灌木林固土和保肥功能优于其余3种林分,混交林和针叶林营养物质累积量和生物多样性优于阔叶林.3)2004−2014年保育土壤(92.91%)、生物多样性保护(4.33%)及涵养水源功能(2.33%)对人工林生态服务功能的贡献率大于固碳释氧(0.37%)、森林防护(0.04%)和净化大气环境(0.02%)功能,其中混交林和针叶林对人工林生态服务功能贡献大于阔叶林和灌木林.由此可见,林分类型和林分面积是影响人工林生态服务功能强弱的主要决定因素.八达岭人工林经营应持续保持保育土壤功能,在保证生物多样性的情况下,应注重固碳增汇功能,建议将现有林分多调整为混交林和灌木林,营造“异龄、复层”的理想人工林生态系统,逐渐提高北京八达岭人工林生态服务功能.

关键词：人工林生态系统生态服务功能价值评估固碳增汇

Organic matter accumulation in lacustrine shale of the Permian Jimsar Sag,junggar Basin,NW China

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Petroleum Science 2023年第3期20卷 1327-1346页

作者： Xiu-Jian Ding Wen-jun He Hai-Lei Liu Xu-guang guo Ming zha Zhong-Fa Jiang School of geosciences in China University of Petroleum QingdaoShandong266580China Research Institute of Petroleum Exploration and Development PetroChina Xinjiang Oilfield CompanyKaramayXinjiang841000China

The lacustrine organic-rich shale in the Permian Lucaogou(LCg)Formation of the Jimsar Sag,junggar Basin,is one of the main shale oil plays in *** this paper,geological and geochemical research techniques were employed to evaluate the geochemical variability of the lacustrine shale and the pro-duction of organic matter and its preservation *** Lcg Formation is characterized by its complex mineral compositions and a wide range of organic matter richness and *** presence of high proportions ofβ-carotane and C2g steranes,indicates that the organic matter mainly originated from phytoplankton and aquatic algal-bacterial organisms,especially *** study found that the productivity of the Lower LCg Member(P2li)was highest,and the Middle LCg Member(P_(2)l_(2))was the *** the deposition of the Lower LCg Member,the lake's bottom water was predominantly a reducing environment,and the degradation of organic matter was largely a result of bacterial sulfate *** the deposition of the Middle and Upper LCg members,the lake's bottom water was mainly oxidizing,and the degradation of organic matter was likely to be caused by aerobic *** on a comprehensive analysis of the origin and production of organic matter,as well as its depo-sitional environment and preservation conditions,two organic matter accumulation models were pro-posed to explain the distribution of the organic-rich *** model A,the high influx of volcanic ash released nutrients and brought abundant sulfate into the water,the accumulation of organic matter was mainly controlled by the preservation of organic matter,which was mainly controlled by *** the model B,the influx of volcanic ash was small,organic matter was mainly degraded by oxygen and the accumulation of organic matter is mainly determined by the production of organic matter.

关键词： Lucaogou formation Jimsar sag Organic-matter-rich shale Organic matter accumulation Organic matter productivity Bacterial sulfate reduction

Two-dimensional multimetallic sulfide nanosheets with multi-active sites to enhance polysulfide redox reactions in liquid Li2S6-based lithium-polysulfide batteries

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Journal of Energy Chemistry 2021年第1期30卷 163-169,I0006页

作者： Chenyang zha Donghai Wu Yuwei zhao jun Deng Jinghua Wu Rong Wu Meng Yang Lin Wang Houyang Chen Key Laboratory of Flexible Electronics(KLOFE) Institute of Advanced Materials(IAM)Nanjing Tech UniversityNanjing 211816JiangsuChina Henan Key Laboratory of Nanocomposites and Applications Institute of Nanostructured Functional MaterialsHuanghe Science and Technology CollegeZhengzhou 450006HenanChina Department of Chemical and Biological Engineering University at BuffaloThe State University of New YorkBuffaloNY 14260-4200USA Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201ZhejiangChina School of Materials and Chemical Technology Tokyo Institute of Technology2-12-1 OokayamaMeguroTokyo 152-8550Japan

The lithium-sulfur battery has attracted enormous attention as being one of the most significant energy storage technologies due to its high energy density and ***,the "shuttle effect" of polysulfide intermediates represents a formidable challenge towards its wide ***,we have designed and synthesized two-dimensional Cu,Zn and Sn-based multimetallic sulfide nanosheets to construct multi-active sites for the immobilization and entrapment of polysulfides with offering better performance in liquid Li2S6-based lithium-polysulfide *** experimental measurements and theoretical computations demonstrate that the interfacial multi-active sites of multimetallic sulfides not only accelerate the multi-chained redox reactions of highly diffusible polysulfides,but also strengthen affinities toward *** adopting multimetallic sulfide nanosheets as the sulfur host,the liquid Li2 S6-based cell exhibits an impressive rate capability with 1200 mAh/g and retains 580 mAh/g at 0.5 mA/cm^(2) after 1000 *** high sulfur mass loading conditions,the cell with 2.0 mg/cm^(2) sulfur loading delivers a cell capacity of 1068 mAh/g and maintains 480 mAh/g with 0.8 mA/cm^(2) and 500 *** study provides new insights into the multifunctional material design with multi-active sites for elevated lithium-polysulfide batteries.

关键词： Multimetallic sulfide Nanosheets Multi-active sites Lithium-polysulfide battery