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Petroleum Science 2022年第3期19卷 1250-1261页

作者： yun-tao li Xiao-Ning He Jian Shuai College of Safety and Ocean Engineering China University of PetroleumBeijingChina

Buried natural gas pipelines are vulnerable to external corrosion because they are encased in a soil environment for a long *** the causes of external corrosion and taking specific maintenance measures is *** this work,a risk analysis and maintenance decision-making model for natural gas pipelines with external corrosion is proposed based on a Bayesian network.A fault tree model is first employed to identify the causes of external *** Bayesian network for risk analysis is determined *** maintenance strategies are then inserted into the Bayesian network to show a reduction of the *** costs of maintenance strategies and the reduced risk after maintenance are combined in an optimization function to build a decision-making *** of the limitations of historical data,some of the parameters in the Bayesian network are obtained from a probabilistic estimation model,which combines expert experience and fuzzy set ***,a case study is carried out to verify the feasibility of the maintenance decision *** indicates that the method proposed in this work can be used to provide effective maintenance schemes for different pipeline external corrosion scenarios and to reduce the possible losses caused by external corrosion.

关键词： Natural gas pipelines External corrosion Risk analysis Maintenance decision making Bayesian network

Self-healing,Stretchable,Temperature-Sensitive and Strain-Sensitive Hydrogel-based Flexible Sensors

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Chinese Journal of Polymer Science 2023年第3期41卷 334-344,I0005页

作者： Chun-Xia Zhao Min Guo Jie Mao yun-tao li Yuan-Peng Wu Hua Guo Dong Xiang Hui li School of Materials Science and Engineering Southwest Petroleum UniversityChengdu 610500China The Center of Functional Materials for Working Fluids of Oil and Gas Field Sichuan Engineering Technology Research Center of Basalt Fiber Composites Development and ApplicationSouthwest Petroleum UniversityChengdu 610500China State Key Lab of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu 610500China

Flexible hydrogels have shown promise as strain sensors in medical monitoring,human motion detection and intelligent *** a hydrogel strain sensor,certain challenges need to be urgently addressed for practical applications,such as the damage caused by external effects,leading to equipment failure,and the inability to perceive ambient temperature,resulting in single ***,a stretchable,self-healing and dual temperature-strain sensitive hydrogel,with a physically-crosslinked network,is designed by constructing multiple dynamic reversible *** oxide(GO)and iron ions(Fe^(3+))act as dynamic bridges in the cross-linked network and are mediated by the covalent and hydrogen bonding,rendering excellent stretchability to the *** reversible features of coordination interactions and hydrogen interactions endow excellent recoverability and self-healing ***,the incorporated N-isopropyl acrylamide(NIPAM)provides excellent temperature responsiveness to the hydrogel,facilitating the detection of external temperature ***,the hydrogels exhibited strain-sensitivity,with a wide working range of 1%-300%,fast response and electrical stability,which can be used as flexible sensors to monitor body motions,e.g.,speaking and the bending of finger,wrist,elbow and ***,the hydrogel possesses dual sensory capabilities,combining external temperature and strain,for potential applications in wearable multifunctional sensing devices.

关键词： Hydrogel sensor Self-healing Dual temperature-strain sensitive Monitor body motions

Effects of host, temperature and relative humidity on competitive displacement of two invasive Bemisia tabaci biotypes [Q and B]

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Insect Science 2012年第5期19卷 595-603页

作者： Dong Chu yun-li tao You-Jun Zhang Fang-Hao Wan Judith K Brown High-tech Research Center Shandong Academy of Agricultural Sciences Institute of Vegetables and Flowers Chinese Academy of Agricultural Sciences State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant Protection Chinese Academy of Agricultural Sciences Beijing China School of Plant Sciences The University of Arizona Tucson USA

Bemisia tabaci shifted unexpectedly in China from a predominance of B biotype to Q biotype during 2005-2008. This observation stimulated an interest in inves- tigating whether environmental factors, including host, temperature and relative humidity （RH） could possibly explain the observed shift in biotypes distribution. Results indicated that all three parameters examined influenced biotype survivability. The percentage of B biotype, when reared together on pepper plants with the Q biotype, decreased significantly from 66.7% in the founder population, to 13.6% and 3.7% in the first and second genera- tions, respectively. When the B （founder at 66.7%） and Q （founder at 33.3%） biotypes were reared together on eggplant alone, or on pepper-plus-eggplant combination, the population size of the B biotype either remained constant, or increased somewhat in the first and sec- ond generations. On eggplant, the effects of RH and temperature on the competitiveness between the Q and B biotypes （3 pairs of Q and 6 pairs of B） were not significant.

关键词： Bemisia tabaci B biotype Q biotype biological invasion host plant non-competitive displacement

Genetic differentiation of Bemisia tabaci （Gennadius）（Hemiptera： Aleyrodidae） biotype Q based on mitochondrial DNA markers

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Insect Science 2008年第2期15卷 115-123页

作者： Dong Chu Fang-Hao Wan yun-li tao Guo-Xia liu Zhong-Xue Fan Yu-Ping Bi High-tech Research Center Shandong Academy of Agncultural Sciences Jinan Shandong The State Key Laboratory for Biology ofPlant Diseasesand Insect Pests Institute of Plant Protection Chinese Academy of Agncultural Sciences Beijing China

In the present study, genetic differentiation of Bemisia tabaci （Gennadius） biotype Q was analyzed based on mitochondrial cytochrome oxidase I （mt CO1） gene sequence. The results showed that B. tabaci biotype Q could be separated into two subclades, which were labeled as subclades Q1 and Q2. Subclade Q1 was probably indigenous to the regions around the Mediterranean area and subclade Q2 to Israel or Cyprus. It was because B. tabaci was composed of several genetically distinct groups with a strong geographical association between more closely related biotypes. Not all of the B. tabaci biotype Q in the non-Mediterranean countries come from the same regions. Until now, all B. tabaci biotype Q in China were grouped into subclade Q 1. The B. tabaci biotype Q introduced into the US included both subclades Q 1 and Q2. The genetic structure analysis showed higher genetic variation of subclade Q 1 than that of subclade Q2.

关键词： Bemisia tabaci biotype Q genetic differentiation mitochondria COI gene

The Application of an Anatomical Database for Fetal Congenital Heart Disease

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Chinese Medical Journal 2015年第19期128卷 2583-2587页

作者： li Yang Qiu-Yan Pei yun-tao li Zhen-Juan Yang Department of Ultrasound Peking University People's HospitalBeijing 100044China Department of Obstetrics and Gynecology Peking University People's HospitalBeijing 100044China

Background：Fetal congenital heart anomalies are the most common congenital anomalies in live *** echocardiography （FECG） is the only prenatal diagnostic approach used to detect fetal congenital heart disease （CHD）.FECG is not widely used,and the antenatal diagnosis rate of CHD varies ***,mastering the anatomical characteristics of different kinds of CHD is critical for ultrasound physicians to improve FECG *** aim of this study is to investigate the applications of a fetal CHD anatomic database in FECG teaching and training ***：We evaluated 60 transverse section databases including 27 types of fetal CHD built in the Prenatal Diagnosis Center in Peking University People＇s *** original database contained 400-700 cross-sectional digital images with a resolution of 3744 pixels × 5616 *** imported the database into Amira 5.3.1 （Australia Visage Imaging Company,Australia） three-dimensional （3D） *** database functions use a series of 3D software visual *** features of the fetal CHD anatomical database were analyzed to determine its applications in FECG continuing education and ***：The database was rebuilt using the 3D *** original and rebuilt databases can be displayed dynamically,continuously,and synchronically and can be rotated at arbitrary *** sections from the dynamic displays and rotating angles are consistent with the sections in *** database successfully reproduced the anatomic structures and spatial relationship features of different fetal *** established a fetal CHD anatomy training database and a standardized training database for *** physicians and students can learn the anatomical features of fetal CHD and FECG through either centralized training or distance ***：The database of fetal CHD successfully reproduced the anatomic structures and spatial relationship of different kinds of fetal *** database can be w

关键词： Anatomic Database Congenital Heart Disease Fetal

CA Investment Casting Process of Complex Castings

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厦门大学学报（自然科学版） 2002年第S1期41卷 17-18页

作者： WU Jian-tao, FENG Di, XIE yun-peng, li Jun-tao, KONG Sheng-guo (Superalloy Institute of Central Iron & Steel Institute, Beijing 100081, China)

CA (Computer aided) investment casting technique used in superalloy castings of aerospace engine parts was presented. CA investment casting integrated computer application, RP (Rapid Prototyping) process, solidification simulation and investment casting process. It broke the bottle neck of making metal die. Solid model of complex parts were produced by UGII or other software, then translated into STL(Stereolithography) file, after RP process of SLS(Selective Laser Sintering), wax pattern used in investment casting can be acquired without metal die in short time. These can reduce period and cost greatly of complex superalloy parts development of engine. The key processes of CA investment casting were discussed. The accuracy of model translation should match that of RP system. Choice of RP material, surface polishing, sintering parameter plays important role in RP process. Other processes, like solidification simulating and optimization of gate system were introduced. The conclusion was that complex parts can be produced by CA investment casting with lots of advantages. The accuracy of castings can reach CT5～7,and the smoothness can get Ra3～13 mm. These parts of engines worked well.

关键词： CA investment casting RP solidification simulation complex parts of engine

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广州市马涌涌底调蓄系统工程设计

中国给水排水 2020年第16期36卷 86-90页

作者：李昀涛广州市市政工程设计研究总院有限公司广东广州510060

广州市马涌流域采用截流式合流制排水系统,雨季溢流污染严重。为提升马涌水质,实施马涌涌底调蓄系统工程,雨季溢流污染收集目标设定为8~10 mm初期雨水。考虑到河涌两岸不具备建设调蓄设施的条件,且溢流口沿河涌呈线性分布,创新性地将4... 详细信息

广州市马涌流域采用截流式合流制排水系统,雨季溢流污染严重。为提升马涌水质,实施马涌涌底调蓄系统工程,雨季溢流污染收集目标设定为8~10 mm初期雨水。考虑到河涌两岸不具备建设调蓄设施的条件,且溢流口沿河涌呈线性分布,创新性地将4个调蓄池建设在河涌底部,并用大口径涌底管道串联起来,在沿途各溢流口设置入流井,可有效缓解马涌流域溢流污染。

关键词：截流式合流制排水系统溢流污染控制调蓄系统

国产X70管线钢与焊接接头组织及SSCC性能

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天津大学学报（自然科学与工程技术版） 2005年第3期38卷 274-278页

作者：李云涛杜则裕陶勇寅李建军天津大学材料科学与工程学院天津300072

输气管道的服役条件多为潮湿环境,输送介质含H2S.随着国产X70管线钢在西气东输工程中的应用,国产高强度管线钢硫化物应力腐蚀开裂(SSCC)性能研究显得尤为重要.为此,测试、分析了国产X70管线钢及其焊缝的组织,进一步采用慢应变速率法(SS... 详细信息

输气管道的服役条件多为潮湿环境,输送介质含H2S.随着国产X70管线钢在西气东输工程中的应用,国产高强度管线钢硫化物应力腐蚀开裂(SSCC)性能研究显得尤为重要.为此,测试、分析了国产X70管线钢及其焊缝的组织,进一步采用慢应变速率法(SSRT)研究了H2S对国产X70管线钢及其焊接接头SSCC的影响,国产X70管线钢及其焊接接头在含H2S腐蚀介质中应力腐蚀敏感性随H2S浓度的增加而增加,在H2S质量分数为50×10-400时,母材的脆性系数为19. 9500,焊缝的脆性系数高达59. 1900.若以2500视为安全值,则在H2S浓度为50×10-40时的母材就SSCC而言是安全的,而焊缝却是不安全的.

关键词：国产X70管线钢焊接接头组织硫化氢硫化物应力腐蚀开裂

miR-224靶向PIK3CD影响DLBCL细胞增殖和侵袭的机制研究

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中国实验血液学杂志 2020年第5期28卷 1578-1584页

作者：谢瑜谭琳李云涛曾云昆明医科大学第一附属医院肿瘤科云南昆明650000

目的:探讨miR-224对弥漫大B细胞淋巴瘤(diffuse large B-cell lymphoma,DLBCL)细胞增殖和侵袭影响的潜在机制。方法:收集2011年6月至2017年12月在昆明医科大学第一附属医院血液科确诊的76例DLBCL初诊患者血液标本(DLBCL组)、41例健康体... 详细信息

目的:探讨miR-224对弥漫大B细胞淋巴瘤(diffuse large B-cell lymphoma,DLBCL)细胞增殖和侵袭影响的潜在机制。方法:收集2011年6月至2017年12月在昆明医科大学第一附属医院血液科确诊的76例DLBCL初诊患者血液标本(DLBCL组)、41例健康体检者血液标本(正常对照组),以及人淋巴内皮细胞HLEC和DLBCL细胞系HBL1、OCI-LY10、OCI-LY8、OCI-LY19。使用RT-qPCR法检测miR-224和PIK3CD mRNA的表达水平。CCK-8法和克隆形成实验检测HBL1细胞增殖能力,Transwell实验检测HBL1细胞侵袭能力。双荧光素酶报告基因验证miR-224与PIK3CD的靶向关系。Western blot检测PIK3CD蛋白的表达水平。结果:miR-224在DLBCL患者血液中表达显著低于正常对照组(P<0.01);过表达miR-224,HBL1细胞增殖和侵袭能力均显著降低(P<0.01)。PIK3CD是miR-224的靶基因,敲减PIK3CD能显著抑制HBL1细胞的增殖和侵袭能力(P<0.01)。结论:miR-224在DLBCL进展中起着关键的作用,miR-224靶向抑制PIK3CD可降低DLBCL细胞系HBL1细胞的增殖和侵袭能力。

关键词：弥漫大B细胞淋巴瘤 miR-224 PIK3CD 细胞增殖侵袭

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焊接匹配及合金元素对国产管线钢腐蚀的影响

钢铁 2005年第7期40卷 68-71页

作者：李云涛杜则裕陶勇寅李建军天津大学材料科学与工程学院天津300072

采用恒载荷拉伸法,测试了国产管线钢母材及其焊接接头的硫化物应力腐蚀开裂SSCC性能。结果表明:焊接匹配、合金元素是影响国产管线钢SSCC的重要因素。不同的焊接匹配将导致管线钢具有不同的耐腐蚀性能;不同碳、锰、磷含量的的国产管线... 详细信息

采用恒载荷拉伸法,测试了国产管线钢母材及其焊接接头的硫化物应力腐蚀开裂SSCC性能。结果表明:焊接匹配、合金元素是影响国产管线钢SSCC的重要因素。不同的焊接匹配将导致管线钢具有不同的耐腐蚀性能;不同碳、锰、磷含量的的国产管线钢在相同试验条件下具有不同的SSCC断裂时间与断裂应力,该试验结果主要是由于它们的Mn、P元素含量不同引起的,而不是C元素。

关键词：国产管线钢焊接匹配合金元素硫化物应力腐蚀开裂