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Physical property and hydrocarbon enrichment characteristics of tight oil reservoir in Chang 7 division of Yanchang Formation,Xin’anbian oilfield,Ordos Basin,China

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Petroleum Science 2021年第5期18卷 1294-1304页

作者： wei-bo zhao Su-Yun Hu Xiu-Qin Deng Bin Bai Shi-Zhen Tao bo Sun Qian-Ru Wang Dang-Xing Cheng Research Institute of PetroChina Petroleum Exploration&Development Beijing100083China Research Institute of Exploration and Development of PetroChina Changqing Oilfield Company Xi'an710020ShaanxiChina School of Earth and Space Sciences Peking UniversityBeijing100871China

Xin’anbian Oilfield of the Ordos Basin is the large tight oilfield to be first exploration discovery in *** production of tight oil increased significantly in recent *** shows great exploration potential of Chang 7 tight *** the physical property and hydrocarbon enrichment characteristics of Chang 7 tight oil reservoirs were rarely studied,The forming conditions of tight oil reservoirs are systematically summarized and analyzed through the study of hydrocarbon generation,sedimentary reservoirs and hydrocarbon migration and accumulation based on production and core experimental *** result shows that,The porosity of the Chang 7_(2)reservoir mainly distributed in 5.0-11.0%,average at 7.9%,The permeability mainly distributed in 0.04-0.18×10^(-3)μm^(2),average at 0.12×10^(-3)μm^(2),The pore diameters of the tight oil reservoir distributed in 2-8μ*** high-quality Chang 7_(3)source rocks and the micropsammite of Chang 7_(2)subaqueous distributary channel were widely distributed in the study *** lenticular or banded sand bodies are distributed among mudstone or hydrocarbon source rocks and have the advantage of migration distance for hydrocarbon *** reservoir space is composed of micro-nanometer pores and throat,that is formed in the process of increasing pressure during hydrocarbon generation and hydrocarbon *** Chang 7 tight oil was generated in the early Cretaceous and injected into the sand of the subaqueous distributary channel driven by continuous hydrocarbon generation *** formation and accumulation of tight oil reservoirs are mainly controlled by source rocks,sedimentary microfacies and reservoirs of good quality.

关键词： Ordos Basin Xin’anbian Oilfield Tight oil Pore structures Cumulation conditions

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混合系统的面向对象仿真

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系统工程与电子技术 2003年第3期25卷 347-349页

作者：郑伟周伯昭国防科学技术大学航天与材料工程学院湖南长沙410073

提出了一种新的混合系统自动机模型。该模型把混合系统看作是由系统行为模式集、连续状态空间、外部输入集、演化函数集、转移函数集、外部输入函数集等组成的六元组,对混合系统的行为具有很强的描述能力。在此基础上,利用面向对象思想... 详细信息

提出了一种新的混合系统自动机模型。该模型把混合系统看作是由系统行为模式集、连续状态空间、外部输入集、演化函数集、转移函数集、外部输入函数集等组成的六元组,对混合系统的行为具有很强的描述能力。在此基础上,利用面向对象思想,把混合系统看作由实体对象、时序对象和界面对象组合而成的对象,建立了混合系统的面向对象仿真模型,并讨论了其仿真逻辑。这一模型为混合系统的仿真提供了通用的框架。

关键词：仿真面向对象混合系统自动机模型

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The Experimental and Theoretical Research of "Local Resonance" in Ultrasonic Honing System

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厦门大学学报（自然科学版） 2002年第S1期41卷 49-页

作者： ZHU Xun-sheng, XU Ke-wei, zhao bo, MA Deng-zhe (Mechanical School of Shanghai Jiaotong University, Shanghai 200030, China)

In 1982, Professor Fang Guoliang found the "Non full resonance" phenomenon in a tool system while he use the thin-long tool ultrasonically machining deep-small hole. He called it as "local resonance". Also this "Non full resonance" phenomenon was discovered in the ultrasonic drilling and the ultrasonic honing system later. To its mechanism, professor Fang thought that the coupling of long-thin tool bar and driving system is weak, so the tool bar can vibrate independently, but the quantitative relation between the coupling factor and diameter ratio is not made certain. Then several theories come forth to interpret it but still haven’t a common conclusion. Through the systematic experimental and theoretical research, this paper reveals that the "local resonance" phenomenon of ultrasonic honing system has the same essence with the "local resonance" phenomenon in deep hole machining system: when the section area ratio of tool bar and driving system is small enough, some resonance frequencies of combined system are close to the resonance frequencies of "fixed-free" state tool bar, the combined system is still resonant. According to the given depth of hole and structure size, we can use the transfer matrix deduced in this paper to design flexible bar and oilstone seat not only satisfying mechanical structure size but also achieving enough magnitude. It greatly simplified the design. This new method can be named as "local resonance" design method for ultrasonic honing system. The experiment, deduction and design method have a certain common meaning to the study and design of other ultrasonic system.

关键词： local resonance ultrasonic honing system full resonance transfer matrix method

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三相逆变器共模干扰分析及抑制技术研究

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电力电子技术 2014年第5期48卷 34-37页

作者：苏利捷魏兆博陈振兰州交通大学自动化与电气工程学院甘肃兰州730070

在脉宽调制(PWM)逆变器系统中,IGBT的高速开关动作会产生很高的电压、电流变化率,从而引起严重的共模电磁干扰(CM-EMI),影响系统的可靠运行。此处介绍了三相逆变器供电时产生的共模电压,分析了其产生机理及负面效应。通过对4种典型CM-EM... 详细信息

在脉宽调制(PWM)逆变器系统中,IGBT的高速开关动作会产生很高的电压、电流变化率,从而引起严重的共模电磁干扰(CM-EMI),影响系统的可靠运行。此处介绍了三相逆变器供电时产生的共模电压,分析了其产生机理及负面效应。通过对4种典型CM-EMI抑制技术的详细介绍,揭示了各种方法的优缺点,为工程实践抑制CM-EMI提供了指导性建议。

关键词：逆变器共模电磁干扰抑制技术

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自行研制滚筒式参比机与进口机型功能配置以及实际应用情况对比

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家电科技 2005年第5期 37-39页

作者：赵维波中国家用电器研究院

1引言全自动滚筒式洗衣机的洗净比(C)是衡量洗净性能的重要指标,这项指标的评价方法离不开'滚筒式参比机',它是衡量洗净比(C)优劣的主要标准器.长期以来,国内各滚筒式洗衣机生产企业普遍采用IEC60456国际标准所推荐的Electrolux FOM71... 详细信息

1引言全自动滚筒式洗衣机的洗净比(C)是衡量洗净性能的重要指标,这项指标的评价方法离不开'滚筒式参比机',它是衡量洗净比(C)优劣的主要标准器.长期以来,国内各滚筒式洗衣机生产企业普遍采用IEC60456国际标准所推荐的Electrolux FOM71系列滚筒式参比机作为洗净用标准器使用.

关键词：应用情况功能配置参比自行研制 Electrolux IEC60456 滚筒式洗衣机机型进口性能测试方法家用洗衣机洗净性能评价方法国际标准生产企业洗净比标准器全自动指标衡量

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新疆水环境现状·存在问题·保护措施

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安徽农业科学 2017年第4期45卷 72-74,131页

作者：段维东赵波新疆维吾尔自治区石河子市石河子镇水管所新疆石河子832000 石河子大学水利建筑工程学院新疆石河子832000

在分析新疆特定的自然地理条件及气候特征的基础上,阐述了新疆目前的水环境现状,分析了目前存在的问题,并提出了相应的保护措施。

关键词：新疆水环境现状存在问题保护措施

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Moment Redistribution Effect of the Continuous Glass Fiber Reinforced Polymer-Concrete Composite Slabs Based on Static Loading Experiment

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Structural Durability & Health Monitoring 2025年第1期19卷 105-123页

作者： zhao-Jun Zhang Wen-wei Wang Jing-Shui Zhen bo-Cheng Li De-Cheng Cai Yang-Yang Du Hui Huang Offshore Oil Engineering Co.Ltd. Tianjin300461China Department of Bridge Engineering School of TransportationSoutheast UniversityNanjing211189China

This study aimed to investigate the moment redistribution in continuous glass fiber reinforced polymer(GFRP)-concrete composite slabs caused by concrete cracking and steel bar yielding in the negative bending moment *** experimental bending moment redistribution test was conducted on continuous GFRP-concrete composite slabs,and a calculation method based on the conjugate beam method was *** composite slabs were formed by combining GFRP profiles with a concrete layer and supported on steel beams to create two-span continuous composite slab *** methods,epoxy resin bonding,and stud connection,were used to connect the composite slabs with the steel *** experimental findings showed that the specimen connected with epoxy resin exhibited two moments redistribution phenomena during the loading process:concrete cracking and steel bar yielding at the internal *** contrast,the composite slab connected with steel beams by studs exhibited only one-moment redistribution phenomenon throughout the loading *** the concrete at the internal support cracked,the bending moment decreased in the internal support section and increased in the midspan *** the steel bars yielded,the bending moment further decreased in the internal support section and increased in the mid-span *** GFRP profiles do not experience cracking,there was no significant decrease in the bending moment of the mid-span *** test specimens experienced compressive failure of concrete at the mid-span *** results showed good agreement between the calculated and experimental values of bending moments in the mid-span section and internal support *** proposed model can effectively predict the moment redistribution behavior of continuous GFRP-concrete composite slabs.

关键词： Moment redistribution GFRP-concrete composite slabs bending moment experimental study analysis model

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Precise gradient separation of nanoparticles using reduced graphene oxide-polyoxomolybdate membranes

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Science China Chemistry 2025年第01期 209-216页

作者： Yixin Yang Wanlei zhao Ruoxuan Zheng Hongqiang Li wei Chen Yu-Fei Song State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Quzhou Institute for Innovation in Resource Chemical Engineering

The purification and size sieving of nanoparticles （NPs） represents a significant scientific ***,the r GO-polyoxometalates (POMs=PMo12,Mo132and Mo368) membranes were fabricated successfully via a simple and scalable POMsassisted in-situ photoreduction *** the mass ratio of r GO to PMo12was 1:30,the resultant r GO-PMo12membranes with highly ordered and uniform nanochannels of 1.0 nm can be obtained,which showed an accurate carbon quantum dots（CQDs） separation with a cut-off size approximately 1.0 *** increase of the size of the interlayered POMs from PMo12（1.0 nm）,{Mo132}（2.9 nm） to{Mo368}（3.8 nm）,the resultant r GO-PMo12,r GO-Mo132and r GO-Mo368exhibited precise gradient separation of CQDs and Au nanoparticles by size exclusion *** results pave a promising way to construct new twodimensional （2D） membranes for highly efficient size-selective separation.

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Potential role and therapeutic implications of glutathione peroxidase 4 in the treatment of Alzheimer's disease

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Neural Regeneration Research 2025年第3期20卷 613-631页

作者： Yanxin Shen Guimei Zhang Chunxiao wei Panpan zhao Yongchun Wang Mingxi Li Li Sun Department of Neurology and Neuroscience Center The First Hospital of Jilin UniversityJilin UniversityChangchunJilin ProvinceChina Cognitive Impairment Center Department of NeurologyThe First Hospital of Jilin UniversityJilin UniversityChangchunJilin ProvinceChina

Alzheimer's disease is an age-related neurodegenerative disorder with a complex and incompletely understood pathogenesis. Despite extensive research, a cure for Alzheimer's disease has not yet been found. Oxidative stress mediates excessive oxidative responses, and its involvement in Alzheimer's disease pathogenesis as a primary or secondary pathological event is widely accepted. As a member of the selenium-containing antioxidant enzyme family, glutathione peroxidase 4 reduces esterified phospholipid hydroperoxides to maintain cellular redox homeostasis. With the discovery of ferroptosis, the central role of glutathione peroxidase 4 in anti-lipid peroxidation in several diseases, including Alzheimer's disease, has received widespread attention. Increasing evidence suggests that glutathione peroxidase 4 expression is inhibited in the Alzheimer's disease brain, resulting in oxidative stress, inflammation, ferroptosis, and apoptosis, which are closely associated with pathological damage in Alzheimer's disease. Several therapeutic approaches, such as small molecule drugs, natural plant products, and non-pharmacological treatments, ameliorate pathological damage and cognitive function in Alzheimer's disease by promoting glutathione peroxidase 4 expression and enhancing glutathione peroxidase 4 activity. Therefore, glutathione peroxidase 4 upregulation may be a promising strategy for the treatment of Alzheimer's disease. This review provides an overview of the gene structure, biological functions, and regulatory mechanisms of glutathione peroxidase 4, a discussion on the important role of glutathione peroxidase 4 in pathological events closely related to Alzheimer's disease, and a summary of the advances in small-molecule drugs, natural plant products, and non-pharmacological therapies targeting glutathione peroxidase 4 for the treatment of Alzheimer's disease. Most prior studies on this subject used animal models, and relevant clinical studies are lacking. Future clinica

关键词： apoptosis ferroptosis inflammation lipid peroxidation natural plant products neurodegenerative disorder neuroprotection oxidative stress small-molecule drugs

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利用吸引电极记录家兔在体心脏单相动作电位的实验分析

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生理学报 1983年第1期35卷 116-120页

作者：赵荣瑞吴博威赵志青山西医学院生理教研组山西医学院生理教研组太原

本文分析了利用吸引电极记录家兔在体心脏单相动作电位(MAP)的实验技术。结果表明,吸引电极抽吸负压的大小是影响 MAP 记录稳定性的基本因素;电极部位的心肌出血则是引起 MAP 波形畸变的重要原因。兔心脏的心尖部位不易出血,因而是记录 ... 详细信息

本文分析了利用吸引电极记录家兔在体心脏单相动作电位(MAP)的实验技术。结果表明,吸引电极抽吸负压的大小是影响 MAP 记录稳定性的基本因素;电极部位的心肌出血则是引起 MAP 波形畸变的重要原因。兔心脏的心尖部位不易出血,因而是记录 MAP 的最适部位。改进的弹簧银球电极可以减少畸变波形。观察了缺血和几种特异性药物对 MAP 的影响,说明 MAP 能反映出心肌复极过程的变化,对于分析心肌的某些电生理特性有一定的实用价值。

关键词：单相动作电位家兔心脏

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