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Controlling Effects of Tight Reservoir Micropore Structures on Seepage Ability: A Case Study of the Upper Paleozoic of the Eastern Ordos Basin, China

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Acta Geologica Sinica(English Edition) 2020年第2期94卷 322-336页

作者： YANG Bo qu Hongjun PU Renhai TIAN Xiahe YANG Huan DONG Wenwu CHEN Yahui State Key Laboratory of Continental Dynamics Deptof GeologyNorthwest UniversityXi'an 710069China

In this study, the types of micropores in a reservoir are analyzed using casting thin section(CTS) observation and scanning electron microscopy(SEM) experiments. The high-pressure mercury injection(HPMI) and constant-rate mercury injection(CRMI) experiments are performed to study the micropore structure of the reservoir. Nuclear magnetic resonance(NMR), gas-water relative seepage, and gas-water two-phase displacement studies are performed to examine the seepage ability and parameters of the reservoir, and further analyses are done to confirm the controlling effects of reservoir micropore structures on seepage ability. The experimental results show that Benxi, Taiyuan, Shanxi, and Shihezi formations in the study area are typical ultra-low porosity and ultra-low permeability reservoirs. Owing to compaction and later diagenetic transformation, they contain few primary pores. Secondary pores are the main pore types of reservoirs in the study area. Six main types of secondary pores are: intergranular dissolved pores, intragranular dissolved pores, lithic dissolved pores, intercrystalline dissolved pores, micropores, and microfracture. The results show that reservoirs with small pore-throat radius, medium displacement pressure, and large differences in pore-throat structures are present in the study area. The four types of micropore structures observed are: lower displacement pressure and fine pores with medium-fine throats, low displacement pressure and fine micropores with fine throats, medium displacement pressure and micropores with micro-fine throats, and high displacement pressure and micropores with micro throats. The micropore structure is complex, and the reservoir seepage ability is poor in the study areas. The movable fluid saturation, range of the gas-water two-phase seepage zone, and displacement types are the three parameters that well represent the reservoir seepage ability. According to the characteristic parameters of microscopic pore structure and seepag

关键词： micro-pore structure seepage ability movable fluid saturation the range of gas-water two phase seepage zone displacement types

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煤矿地质应急救援信息系统设计与实践

煤矿安全 2024年第1期55卷 216-224页

作者：余永鹏毛兴军闫建波王嘉文杨彦成屈博冯锋宁夏回族自治区煤炭地质局宁夏银川750002 中煤航测遥感集团有限责任公司陕西西安710099 宁夏大学信息工程学院宁夏银川750021

随着煤炭资源大规模开采,煤矿地质灾害潜在隐患也越来越多,煤矿灾害事故往往具有突发性、偶然性和复杂性等特点。信息技术可以对多源信息进行快速集成与处理,是进行有效救援的重要支持手段。以煤矿安全生产实际为背景,结合地质勘查单位... 详细信息

随着煤炭资源大规模开采,煤矿地质灾害潜在隐患也越来越多,煤矿灾害事故往往具有突发性、偶然性和复杂性等特点。信息技术可以对多源信息进行快速集成与处理,是进行有效救援的重要支持手段。以煤矿安全生产实际为背景,结合地质勘查单位业务特点,在系统需求分析基础上,设计了系统功能,提出了系统建设的关键技术和实现方法,开发建设了符合煤矿地质应急救援实际需求的信息系统。以宁南煤田某煤矿为示范,验证了系统功能的合理性。

关键词：煤矿地质灾害应急救援信息系统三维模型救援分析关键技术

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基于射流机理的泥浆罐清洗工艺参数研究

流体机械 2024年第1期52卷 62-68页

作者：韦志超李欣曲玉栋庞雷巴胜富童岭王永强鲁飞合肥通用机械研究院有限公司合肥230031 合肥通用机械研究院有限公司通用机械复合材料技术安徽省重点实验室合肥230031 铜陵有色金属集团股份有限公司安徽铜陵244000

针对传统钻井泥浆罐清洗采用人工进罐作业,存在安全隐患及效率低等问题,结合泥浆罐结构和罐内油泥沉积特点,从泥浆罐清洗工艺出发,分析“以油洗油”射流方式对罐内油泥冲击、破碎和溶解的清洗机理,开展射流轨迹模型、喷枪清洗模式、射... 详细信息

针对传统钻井泥浆罐清洗采用人工进罐作业,存在安全隐患及效率低等问题,结合泥浆罐结构和罐内油泥沉积特点,从泥浆罐清洗工艺出发,分析“以油洗油”射流方式对罐内油泥冲击、破碎和溶解的清洗机理,开展射流轨迹模型、喷枪清洗模式、射流打击力等研究。结果表明,当射流压力为0.7 MPa、流量为500 L/min、喷嘴出口直径为18 mm时,以白油为射流清洗介质,当靶距为8 m时,射流打击力为213 N,所研制的三维旋转喷枪完全满足典型钻井泥浆罐清洗作业要求。同时,三维旋转喷枪设置有罐底和罐壁2种分区清洗模式,通过清洗模式的切换,实现泥浆罐全方位清洗。研究结果可为泥浆站钻井泥浆罐安全、高效、自动化清洗提供参考。

关键词：钻井泥浆罐射流清洗射流轨迹射流打击力靶距

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水土保持碳汇研究简述及当前工作主要抓手

亚热带水土保持 2024年第3期36卷 52-54页

作者：孙坤君黄华爱瞿翼廖盛彦广西壮族自治区水利电力勘测设计研究院有限责任公司广西南宁530023 广西壮族自治区水利厅广西南宁530023

本文首先简要介绍了水土保持碳汇的基本情况以及碳汇工作在我国的发展现状,进而分析了广西碳汇资源存在的特点及面临的形势。对水土保持碳汇实现途径及水土保持碳汇计量监测评估等方面进行剖析,梳理近期水土保持碳汇工作的主要抓手和努... 详细信息

本文首先简要介绍了水土保持碳汇的基本情况以及碳汇工作在我国的发展现状,进而分析了广西碳汇资源存在的特点及面临的形势。对水土保持碳汇实现途径及水土保持碳汇计量监测评估等方面进行剖析,梳理近期水土保持碳汇工作的主要抓手和努力方向,旨在为行业内开展水土保持碳汇相关工作提供参考。

关键词：水土保持碳汇计量评估交易碳达峰碳中和

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含裂纹纳米板振动问题的哈密顿体系方法

计算力学学报 2024年第1期41卷 66-72页

作者：屈建龙周震寰徐新生大连理工大学工程力学系工业装备结构分析优化与CAE软件全国重点实验室大连116024

基于裂纹处范德华力效应,采用非局部弹性理论构造纳米板模型,并通过导入哈密顿体系建立含裂纹纳米板振动问题的对偶正则控制方程组。在全状态向量表示的哈密顿体系下,将含裂纹纳米板的固有频率和振型问题归结为广义辛本征值和本征解问... 详细信息

基于裂纹处范德华力效应,采用非局部弹性理论构造纳米板模型,并通过导入哈密顿体系建立含裂纹纳米板振动问题的对偶正则控制方程组。在全状态向量表示的哈密顿体系下,将含裂纹纳米板的固有频率和振型问题归结为广义辛本征值和本征解问题。利用哈密顿体系具有的辛共轭正交关系,得到问题解的级数解析表达式。结合边界条件,得到固有频率与辛本征值的代数方程关系式,进而直接给出固有频率的表达式。数值结果表明,非局部尺寸参数和裂纹长度对纳米板振动的各阶固有频率有直接的影响。对比表明,辛方法是准确且可靠的,可为工程应用提供依据。

关键词：哈密顿体系含裂纹纳米板非局部理论振动固有频率

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Dual-Band Flexible MIMO Antenna with Self-Isolation Enhancement Structure for Wearable Applications

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Chinese Journal of Electronics 2023年第4期32卷 692-702页

作者： YANG Lingsheng XIE Yizhang JIA Hongting qu Meixuan LU Zhengyan LI Yajie Nanjing University of Information Science and Technology Kyushu University Zhongda Hospital Southeast University

A two-element dual-band flexible multiin multi-out antenna which can be used for wearable applications is proposed in this paper. The antenna consists of two radiating elements fed by coplanar waveguide, and a shielding layer, which are all made of flexible conductive cloth MKKTN260. Each radiating element is composed of two coupled split ring-shaped bending strips. The proposed antenna shows two measured impedance bandwidth(S1130 dB) has been achieved for both the bands. Other characteristics for wearable applications like gain, efficiency, specific absorption rate, and bending performances were also studied.

关键词： Structural rings Antenna measurements Impedance measurement Dual band Medical services Bending Specific absorption rate

The correlation study on antimicrobial resistance and biofilm related genes in clinical isolates of Acinetobacter baumannii

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中华危重病急救医学 2013年第8期25卷 493-494页

作者： DONG Rong GUAN Chun HU Dan XIN Ting-ting qu Yan Department of Intensive Care Unit the Affiliated Qingdao Municipal Hospital Dong Yuan of Qingdao University Medical College Shandong Qingdao 266071 Department of Intensive Care Unit Linyi People's Hospital Shandong Linyi 276000

In recent years,the proportion of nosocomial infections caused by Acinetobacter baumannii (Ab) strains has increased significantly,and its resistance to antibiotics is *** resistance mechanisms of Ab are complex,which include the integron formation,inactivating or deactivating enzyme,outer membrane permeability,biofilm formation,drug exocytosis mechanism and so *** biofilm formation by bacteria leads to high resistance and immune evasion *** aim of this study is to investigate the resistance and distribution patterns of Ab isolates,and the biofilm formation related genes in Ab isolates in our hospital。

关键词：急救医学医疗卫生行业医疗工作医疗服务

Terahertz radiation enhancement in photoconductive antennas with embedded split-ring resonators

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Chinese Optics Letters 2020年第11期18卷 82-87页

作者： Hu Deng Weiwei qu quancheng Liu Zhixiang Wu Liping Shang School of Information Engineering Southwest University of Science and TechnologyMianyang 621010China Joint Laboratory for Extreme Conditions Matter Properties Southwest University of Science and TechnologyMianyang 621010China

This Letter proposes a novel method for enhancing terahertz(THz) radiation from microstructure photoconductive antennas(MSPCA). We present two types of MSPCA, which contain split-ring resonators(SRRs) and dipole photoconductive antennas(D-PCAs). The experimental results reveal that when the femtosecond laser is pumping onto the split position of the SRR, the maximum THz radiation power is enhanced by 92 times compared to pumping at the electrode edge of the D-PCA. Two π phase shifts occur as the pumping laser propagates from the negative electrode to the positive electrode. Analysis shows that photoinduced carrier charges move within the split position of the SRR.

关键词： terahertz microstructure photoconductive antenna split-ring resonators

Neuroprotective effects of curculigoside against Alzheimer’s disease via regulation oxidative stress mediated mitochondrial dysfunction in L-Glu-exposed HT22 cells and APP/PS1 mice

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Food Science and Human Wellness 2023年第4期12卷 1265-1278页

作者： Wenqi Wang Yidi qu Siyu Li Jinyu Chu Hongxin Yang Lirong Teng Di Wang School of Life Sciences Jilin UniversityChangchun 130012China

Curculigoside(CCG)is a phenolic glycoside compound extracted from the root of a natural plant called Curculigo orchioides *** this study,the neuroprotective effect of CCG through oxidative stress mediated mitochondrial dysfunction on L-glutamate(L-Glu)-damaged hippocampal neuron cell line(HT22)and APPswe/PSEN1dE9 transgenic(APP/PS1)mice were ***,CCG in L-Glu-damaged HT22 cells suppressed apoptosis,reduced the accumulation of reactive oxygen species,balanced the mitochondrial membrane potential and prevented the over-influx of *** APP/PS1 mice,4-week CCG administration significantly improved their memory and behavioral impairments,enhanced the function of cholinergic system,reduced the deposition of Aβand neurofibrillary fiber tangles caused by tau phosphorylation,and suppressed the development and progression of oxidative stress in brains of APP/PS1 *** on the screening of proteomic analysis on hippocampus,CCG were confirmed that it could regulate the expression levels of proteins related to mitochondrial dysfunction,mainly through activating on AMPK/Nrf2 signaling,in APP/PS1 mice and L-Glu-exposed HT22 *** has a prominent neuroprotective effect on regulate the AMPK/Nrf2-mediated mitochondrial dysfunction in cells APP/PS1 mice support CCG is a potentially potent drug for AD treatment and merits further investigation.

关键词： Alzheimer’s disease Curculigoside Apoptosis Oxidative stress Mitochondrial dysfunction AMPK/Nrf2 signaling