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运用生物酶降低聚合物钻井液引起的地层伤害

探矿工程（岩土钻掘工程） 2003年第S1期30卷 261-263页

作者：李云波乌效鸣蔡记华中国地质大学〈武汉〉工程学院湖北武汉430074

聚合物钻井液是目前国内许多油田使用的主要钻井液体系之一 ,也是水文水井钻井液的发展方向之一。但采用聚合物钻井液钻井会对地层造成诸多伤害。详细介绍了生物酶降解聚合物的作用机理 ,通过粘度降低、渗透率恢复和泥饼清除实验 ,表明... 详细信息

聚合物钻井液是目前国内许多油田使用的主要钻井液体系之一 ,也是水文水井钻井液的发展方向之一。但采用聚合物钻井液钻井会对地层造成诸多伤害。详细介绍了生物酶降解聚合物的作用机理 ,通过粘度降低、渗透率恢复和泥饼清除实验 ,表明生物酶具有良好的降低地层伤害效果。利用中东地区一个多油层井的对比实验。

关键词：生物酶聚合物钻井液地层伤害

Prevalence of Helicobacter pylori infection in Chinese military personnel:A cross-sectional,multicenter-based study

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World Journal of Gastroenterology 2025年第3期31卷 42-49页

作者： Han-Chen Min Chun-Yan Zhang Fang-Yu Wang Xiao-Hui Yu Shan-Hong Tang Hong-wu Zhu Ya-Gang Zhao ji-Luo Liu jian Wang jing-Han Guo Xiao-Mei Zhang Yun-Sheng Yang Chinese People’s Liberation Army Medical School Chinese People’s Liberation Army General HospitalBeijing 100853China Department of Gastroenterology and Hepatology The First Medical CenterChinese People’s Liberation Army General HospitalBeijing 100853China Sixth Healthcare Department The Second Medical CenterChinese People’s Liberation Army General HospitalBeijing 100853China Department of Gastroenterology The 940th Hospital of Joint Logistic Support Force of Chinese People’s Liberation ArmyLanzhou 730050Gansu ProvinceChina Department of Gastroenterology General Hospital of Western Theater CommandChengdu 610011Sichuan ProvinceChina Department of Gastroenterology General Hospital of Southern Theater CommandGuangzhou 510010Guangdong ProvinceChina Department of Epidemiology Naval Medical UniversityShanghai 200433China School of Medicine Nankai UniversityTianjin 300071China National Clinical Research Center for Geriatric Diseases Chinese People’s Liberation Army General HospitalBeijing 100853China

BACKGROUND Helicobacter pylori(***)infection is a prevalent disease encountered in military internal medicine and recognized as the main cause of dyspepsia,gastritis,and peptic ulcer,which are common diseases in military *** guidelines in China state all patients with evidence of active infection with *** are offered ***,the prevalence of *** infection and its regional distribution in the military population remain unclear,which hinders effective prevention and treatment *** the prevalence of *** infection in the military population will aid in the development of customized strategies to better manage this infectious *** To investigate the prevalence of *** infection in the Chinese military population in different geographic *** This multicenter,retrospective study included 22421 individuals from five tertiary hospitals located in north,east,southwest,and northwest cities of *** infection was identified using the urea breath test,which had been performed between January 2020 and December *** Of the 22421 military service members,7416(33.1%)were urea breath *** highest prevalence of *** was in the 30-39 years age group for military personnel,with an infection rate of 34.9%.The majority of infected subjects were younger than 40-years-old,accounting for 70.4%of the infected *** individuals serviced in Lanzhou and Chengdu showed a higher infection prevalence than those in Beijing,Nanjing,and Guangzhou,with prevalence rates of 44.3%,37.9%,29.0%,31.1%,and 32.3%,*** *** infection remains a common infectious disease among military personnel in China and has a relatively high prevalence rate in northwest China.

关键词： Helicobacter pylori Prevalence Military personnel Urea breath test Multicenter study

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无损高密度电法在城市沟渠探测中的应用

甘肃冶金 2019年第2期41卷 97-98页

作者：吴冀明翁望飞哈文汪永辉安徽省地质矿产勘查局332地质队安徽黄山245000

高密度电法是一种高精度、高效率的探测方法,其处理软件成熟,成果图件直观,可以清晰反映目标地质体截面特征,深受地质工作者欢迎。然而,由于城市街区的道路普遍硬化,需要用电锤打眼或撬开地面砖才能供电测量,不仅降低了工作效率也对路... 详细信息

高密度电法是一种高精度、高效率的探测方法,其处理软件成熟,成果图件直观,可以清晰反映目标地质体截面特征,深受地质工作者欢迎。然而,由于城市街区的道路普遍硬化,需要用电锤打眼或撬开地面砖才能供电测量,不仅降低了工作效率也对路面造成一定的伤害。为了在城市空间勘查中,充分应用高密度电法勘查技术,笔者摸索出了一套城市硬性路面条件下的高密度无损探测技术,试验结果表明,该项技术是成功的,在屯溪老街区的排洪沟渠探测中,取得了良好的勘查效果。

关键词：高密度电法无损探测技术城市空间勘查沟渠探测

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Ni-Ti形状记忆合金爆炸焊接试验研究

内蒙古工业大学学报（自然科学版） 2008年第3期27卷 204-208页

作者：蔺宇龙佟铮吴继明白力中内蒙古工业大学材料科学与工程学院呼和浩特010051 北京昊煜爆炸加工厂北京102300

N i-T i形状记忆合金是一种新型的功能材料,在传统的高温熔融焊接后,常常改变焊接热影响区的形状记忆功能,因此,寻求一种保持其组织和形状记忆功能基本不发生改变的焊接技术,显得更为重要和迫切.对于冲击韧性值较低的形状记忆合金,能否... 详细信息

N i-T i形状记忆合金是一种新型的功能材料,在传统的高温熔融焊接后,常常改变焊接热影响区的形状记忆功能,因此,寻求一种保持其组织和形状记忆功能基本不发生改变的焊接技术,显得更为重要和迫切.对于冲击韧性值较低的形状记忆合金,能否通过爆炸焊接实现其冶金结合,是人们积极探索的新方法.本文采用下限法对形状记忆合金爆炸焊接技术进行了试验研究,并通过增加缓冲板改变常规平行法布药结构,以降低复板运动速度,成功实现了直接结合的最佳爆炸焊接界面.

关键词： Ni—Ti合金形状记忆爆炸焊接下限法直接结合

Effect and molecular mechanism of mir-146a on proliferation of lung cancer cells by targeting and regulating MIF gene

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Asian Pacific Journal of Tropical Medicine 2016年第8期9卷 783-788页

作者： wu-ming Wang ji-Chun Liu Medical College of Nanchang University Department of Thoracic Surgery Jiangxi Chest Hospital Department of Thoracic & Cardiovascular Surgery the First Affiliated Hospital of Nanchang University

Objective: To discuss the effect and molecular mechanism of mi R-146 a on the proliferation of lung cancer cells by targeting and regulating the macrophage migration inhibitory factor(MIF) gene. Methods: RT-PCR was employed to detect expression of mi R-146a; immunohistochemistry was used to detect the expression of MIF. The luciferase reporter gene technique was adopted to verify that MIF was the specific reverse target gene of mi R-146 a and the liposome LipofectamineTM2000 was employed to transfer the modeled mi R-146 a mimics, and mi R-146 a negative control(NC) in NSCLC cells to detect the expression of MIF m RNA and protein. MTT assay was used to detect cell viability, cloning technique to detect cell proliferation ability, Annexin V-PI to detect cell apoptosis, UV spectrophotometry to detect viability of cysteinyl aspartate specific proteinase 3(Caspase 3), and western blot to detect expression of nuclear factor-κB(NF-κB) in cells. Results: The expression of mi R-146 a in NSCLC lung tissues was lower than that in the normal lung tissues besides the lung cancer; while the expression of mi R-146 a in NSCLC cells was lower than that in normal human embryonic lung tissues. It was chosen as the subsequent cell line for its appropriate expression in A549. The expression of MIF protein in NSCLC lung tissues was higher than that in the normal lung tissues besides the lung cancer. The luciferase reporter gene proved that MIF was the reverse target gene of mi R-146 a. The mi R-146 a mimics were transfected into A549 cells through the liposome. Compared with NC group, the expression of MIF protein and m RNA was significantly decreased(P<0.01), with the decrease in the cell viability(P<0.01), the decrease in the number of clones(P<0.01), cell apoptosis(P<0.01), the increase in the activity of Caspase 3(P<0.01), and decrease in the phosphorylation of NF-κB p65(P<0.01). Conclusions: mi R-146 a has low expression in NSCLC tissues and cell lines, while MIF has the over expres

关键词： MicroRNA-146a Macrophage migration inhibition factor Non-small cell lung cancer Proliferation

SPECTRAL ANALYSIS OF THE FIRST-ORDER HERMITE CUBIC SPLINE COLLOCATION DIFFERENTIATION MATRICES

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Journal of Computational Mathematics 2002年第5期20卷 551-560页

作者： ji-ming wu Long-jun Shen Inst Appl Phys & Computat Math Lab Computat Phys Beijing 100088 Peoples R China

Presents a study that determined a theoretical proof for the spectral analysis result of the first-order Hermite cubic spline collocation differentation matrices. Background on the Hermite cubic spline collocation method; Basis of the argumentation in the study regarding the condensation technique and the Hurwitz theorem; Numerical results.

关键词： spline collocation differentiation matrices spectral analysis

Quantum tunneling of ultracold atoms in optical traps

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Frontiers of physics 2014年第2期9卷 137-152页

作者： jian-Hua wu Ran Qi An-Chun ji wu-ming Liu Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China

We review our theoretical advances in quantum tunneling of BoseEinstein condensates in optical traps and in microcavities. By employing a real physical system, the frequencies of the pseudo Goldstone modes in different phases between two optical traps are studied respectivdy, which are tile crucial feature of the non-Abelian Joseptmon effect. When the optical lattices are under gravity, we investigate the quantum tummling in the ＂Wannier-Stark localization＂ regime and ＂Lan（lau Zener tunneling＂ regime. We finally get the total decay rate and the rate is valid over the entire range of temperatures. At high temperatures, we show how the decay rate reduces to the appropriate results for the classical thermal activation. At hltermediate temperatures, the results of tile total decay rate are consistent with the thermally assisted tunneling. At low temperatures, we obtain the pure quantmn tunneling ultimately. And we study the alternating-current and direct-current （ac and de） photonic 3osephson effects in two weakly linked microcavities containing ultracold two-level atones, which allows for direct observation of the effects. This enables new investigations of the effect of maw-body physics in strongly coupled atom-cavity systems and provides a strategy for constructing novel interference devices of coherent photons. In addition, we propose the experimental protocols to observe these quantmn tunneling of Bose- Einstein condensates.

关键词： quantum tunneling Josephson effect Landau-Zener tunneling atom-cavity

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基于USB的生理信号采集与通信控制

微处理机 2004年第2期25卷 26-28页

作者：曾凡顺吴效明陈继焱华南理工大学生物力学研究所广州510640

本文介绍一种用 USB接口实现生理信号采集的方案。给出了上下位机之间的 USB接口电路 ,并详细说明了通信控制原理及程序实现的方法。

关键词： USB 生理信号数据采集通信控制

On the Distribution of Laplacian Eigenvalues of a Graph

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Acta Mathematica Sinica,English Series 2011年第11期27卷 2259-2268页

作者： ji ming GUO Xiao Li wu jiong ming ZHANG Kun Fu FANG Department of Applied Mathematics China University of Petroleum Dongying 257061 P. R. China Faculty of Science Huzhou Teachers College Huzhou 313000 P. R. China

This paper presents some bounds on the number of Laplacian eigenvalues contained in various subintervals of [0, n] by using the matching number and edge covering number for G, and asserts that for a connected graph the Laplacian eigenvalue 1 appears with certain multiplicity. Furthermore, as an application of our result （Theorem 13）, Grone and Merris＇ conjecture [The Laplacian spectrum of graph II. SIAM J. Discrete Math., 7, 221-229 （1994）] is partially proved.

关键词： Laplacian eigenvalue matching number edge covering number pendant neighbor