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产业科技创新 2024年第4期6卷 71-74页

作者：关鹏田晓江蔡婧高观玲成楚北京市燃气集团有限责任公司北京100032

本文对城镇燃气管道结构完整性内检测技术进行了综述,介绍了其研究背景、发展现状、存在的问题以及未来研究方向。通过对多种检测方法的比较和分析,指出了当前内检测技术的发展趋势和亟待解决的问题。

关键词：城镇燃气管道结构完整性内检测技术管道中心线定位管道测径

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原发性肾类癌伴马蹄肾1例报道并文献复习

微创泌尿外科杂志 2024年第1期13卷 53-56页

作者：张涛彭程李小航许勇张旭黄庆波暨南大学附属广州红十字会医院泌尿外科广州510220 中国人民解放军总医院泌尿外科医学部北京100853

原发性肾类癌极为罕见,肾畸形,如马蹄肾等是其高危因素,确诊需要组织病理学检查,治疗以手术为主。原发性肾类癌恶性程度较低,但也可转移至肝、肺、脑、骨骼等部位,因此术后应密切随访。本文报道了1例原发性肾类癌伴马蹄肾患者,并结合文... 详细信息

原发性肾类癌极为罕见,肾畸形,如马蹄肾等是其高危因素,确诊需要组织病理学检查,治疗以手术为主。原发性肾类癌恶性程度较低,但也可转移至肝、肺、脑、骨骼等部位,因此术后应密切随访。本文报道了1例原发性肾类癌伴马蹄肾患者,并结合文献复习了原发性肾类癌的临床、病理特点、诊疗方法和预后因素。

关键词：神经内分泌瘤肾类癌马蹄肾

Synthesis,characterization and photoluminescence of aluminum N-aryloxo functionalized β-ketoiminate complexes

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Chinese Science Bulletin 2011年第14期56卷 1471-1475页

作者： FENG Tao peng HongMei YAO YingMing ZHANG Yong SHEN Qi cheng YanXiang Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou 215123 China State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry. Chinese Academy of Sciences Changchun 130022. China

The synthesis,characterization and luminescent properties of aluminum complexes containing a dianionic N-aryloxo functionalized β-ketoiminate ligand are presented.4-(2-Hydroxy-5-R-phenyl)imino-2-pentanone (R=Me,L 1 H 2;R=tert-butyl,L 2 H 2) ligands reacted with AlEt 3 in tetrahydrofuran to give the aluminum complexes (L 1 AlEt) 2 (1) and (L 2 AlEt) 2 (2) in reasonable isolated yields.X-ray diffraction revealed that complexes 1 and 2 have solvent-free centrosymmetric dimeric structures,and each aluminum center has distorted trigonal bipyramidal *** room temperature,complexes 1 and 2 exhibit blue photoluminescence in acetonitrile with maximum emission wavelengths of 419 and 413 nm,respectively.

关键词：光致发光复合物合成表征铝发光性能四氢呋喃中心对称

Colitis and colorectal tumors should be further explored and differentiated

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World Journal of Gastrointestinal Oncology 2022年第8期14卷 1597-1599页

作者： Dong-Hui Xu Bo Zhou zhi-peng Li Lian-Ping He Xin-Juan Wang School of Medicine Taizhou UniversityJiaojiang 318000Zhejiang ProvinceChina

The original article by Yuichi et al explored whether the Japan Narrow-Band Imaging Expert Team classification and the pit pattern classification are suitable for diagnosing neoplastic lesions in patients with ulcerative *** this letter,we offer some other *** factors for colorectal tumors include type 2 *** genetic factors,the deletion or mutation of some genes,such as the p53 gene,can lead to colorectal *** are significant gender differences in the occurrence and development of colorectal *** nongenetic factors,such as smoking,are also associated with the development of colorectal *** all suggest that colorectal tumors are not only caused by ulcerative colitis,and we suggest further exploration and differentiation between colitis and colorectal tumors.

关键词： Colorectal cancer Nicotine p53 Tobacco Ulcerative colitis

Bilateral diffuse uveal melanocytic proliferation associated with endometrial carcinoma–multimodal imaging analysis

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International Journal of Ophthalmology(English edition) 2022年第7期15卷 1209-1213页

作者： zhi-peng Cai Hong Zhang Jin-Jing Zhang Chuan-Hong Jie Fang-Tian Dong Eye Hospital China Academy of Chinese Medical SciencesBeijing 100040China Department of Ophthalmology Peking Union Medical College HospitalChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100730China

Dear Editor,We present a rare case of bilateral diffuse uveal melanocytic proliferation (BDUMP) associated with endometrial *** is a rare paraneoplastic ocular syndrome with generally poor *** features include:1) multiple subtle,round,or oval red patches in the retinal pigment epithelium (RPE) of the posterior fundus;2)multifocal areas of early hyperfluorescence corresponding to these patches;3) development of multiple,slightly elevated pigmented and non-pigmented uveal melanocytic tumours with diffuse thickening of the uveal tracts;4) exudative retinal detachment;5) rapid progression of *** patches progressively increase in size and merge into the giraffe-like pattern characteristic of *** signs may be present,including cysts in the ciliary body and iris,dilated episcleral vessels,and a shallow anterior chamber.

关键词： elevated epithelium modal

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学龄前儿童语用预设能力发展的实证研究

外语导刊 2024年第4期47卷 30-38,158,159页

作者：程璐璐张婷展琳琳刘艳芹富柄淇彭玉乐中国石油大学<华东>外国语学院山东青岛266580 黑龙江大学西语学院黑龙江哈尔滨150080 东北石油大学外国语学院黑龙江大庆163319 中国海洋大学外国语学院山东青岛266100

本研究基于语用预设与预设触发语分类理论,选取139名不同年龄段学龄前儿童进行预设触发语理解能力测试,探究不同年龄段学龄前儿童语用预设能力的发展特征并分析其语用预设的认知加工机制。研究发现,随着年龄的增长,不同年龄段学龄前儿... 详细信息

本研究基于语用预设与预设触发语分类理论,选取139名不同年龄段学龄前儿童进行预设触发语理解能力测试,探究不同年龄段学龄前儿童语用预设能力的发展特征并分析其语用预设的认知加工机制。研究发现,随着年龄的增长,不同年龄段学龄前儿童理解预设触发语的能力整体呈递增趋势,但语用预设能力的发展优势各有不同。本研究尝试从认知加工机制视角诠释学龄前儿童语用预设的发展轨迹,以深化对儿童语言发展特征及认知加工过程的认知与解读,以期为语义学与语用学界面研究提供新的视角和证据。

关键词：语用预设能力学龄前儿童儿童语言预设触发语

焊接参数对YG16硬质合金/35CrMo钢异质金属焊接接头组织与性能的影响

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轨道交通材料 2024年第4期3卷 17-24页

作者：刘思铧程志赵磊高华张小军任瑞铭大连交通大学辽宁大连116021 中车戚墅堰机车车辆工艺研究所股份有限公司江苏常州213011

采用BAg50CuZnCd银基钎料作为填充金属,对YG16硬质合金与35CrMo钢进行了高频感应钎焊连接,并分析了焊接温度、加热速度、保温电流和保温时间共16种工艺参数组合对接头显微组织和力学性能的影响规律。研究结果表明:典型接头硬质合金侧界... 详细信息

采用BAg50CuZnCd银基钎料作为填充金属,对YG16硬质合金与35CrMo钢进行了高频感应钎焊连接,并分析了焊接温度、加热速度、保温电流和保温时间共16种工艺参数组合对接头显微组织和力学性能的影响规律。研究结果表明:典型接头硬质合金侧界面基本保持原始的硬质合金组织结构,主要是由WC颗粒及Co(s,s)组成,焊缝主要是由Ag(s,s)和Cu(s,s)的共晶组织组成。焊接温度对接头显微组织的影响最为显著。随着焊接温度的升高,焊缝截面的微观组织中亮色Ag基固溶体所占比例越来越小,而灰色片状Cu基固溶体所占比例越来越大。焊接温度和保温时间对接头的剪切强度影响较大,加热速度和保温电流对接头的剪切强度影响不大。接头的剪切强度随着Cu基固溶体含量的增加而升高。由于Cu基固溶体的硬度较高,其含量增加到一定程度时,接头的脆性增大,剪切强度开始降低。所有接头焊缝处的显微硬度值均稳定在210 HV左右,当焊接温度、加热速度、保温电流、保温时间增大时,焊缝中的Cu(s,s)的含量增加,焊缝的硬度值也随之增加。最优参数组合为焊接温度700℃,加热速度20℃/s,保温电流300 A,保温时间20 s,此时接头的强度达到最大值。

关键词：硬质合金钢材高频感应钎焊焊接参数微观结构

Study of main factors influencing unsteady-state temperature drop in oil tank storage under dynamic thermal environment coupling

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Petroleum Science 2023年第6期20卷 3783-3797页

作者： Wei Sun Ming-Yang Li Yu-Duo Liu Qing-Lin cheng Li-Xin Zhao Shuai Shao zhi-Hua Wang Key Laboratory for Enhancing Oil&Gas Recovery of Ministry of Education Northeast Petroleum UniversityDaqing163318HeilongjiangChina

With the increasing oil demand, the construction of oil energy reserves in China needs to be further strengthened. However, given that there has been no research on the main influencing factors of crude oil temperature drop in storage tanks under actual dynamically changing environments, this paper considers the influence of dynamic thermal environment and internal crude oil physical properties on the fluctuating changes in crude oil temperature. A theoretical model of the unsteady-state temperature drop heat transfer process is developed from a three-dimensional perspective. According to the temperature drop variation law of crude oil storage tank under the coupling effect of various heat transfer modes such as external forced convection, thermal radiation, and internal natural convection, the external dynamic thermal environment influence zone, the internal crude oil physical property influence zone, and the intermediate transition zone of the tank are proposed. And the multiple non-linear regression method is used to quantitatively characterize the influence of external ambient temperature, solar radiation, wind speed, internal crude oil density, viscosity, and specific heat capacity on the temperature drop of crude oil in each influencing zone. The results of this paper not only quantitatively explain the main influencing factors of the oil temperature drop in the top, wall, and bottom regions of the tank, but also provide a theoretical reference for oil security reserves under a dynamic thermal environment.

关键词： Oil temperature drop Forced convection Natural convection Dynamic thermal environment Quantitative analysis

Efficacy and safety of low-dose thalidomide combined with mesalazine in the treatment of refractory ulcerative colitis in adults

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Gastroenterology Report 2022年第1期10卷 653-655页

作者： Jun-Rong Chen Lei Mai Jia-Chen Sun Xiang peng Min Zhang Min zhi Department of General Practice The Sixth Affiliated HospitalSun Yat-sen UniversityGuangzhouGuangdongP.R.China Department of Gastroenterology The Fifth Affiliated HospitalSun Yat-sen UniversityZhuhaiGuangdongP.R.China Department of Gastrointestinal Endoscopy The Sixth Affiliated HospitalSun Yat-sen UniversityGuangzhouGuangdongP.R.China Department of Gastroenterology The Sixth Affiliated HospitalSun Yat-sen UniversityGuangzhouGuangdongP.R.China

Introduction Inducing and maintaining clinical remission and mucosal healing is essential in the treatment of ulcerative colitis(UC),a nonspecific chronic recurrent inflammatory disorder[1].Mesalazine(5-ASA)is commonly prescribed as a first-line drug for *** the short-term efficacy of ciclosporin and infliximab,some patients may develop methylprednisolone resistance or dependence[2].

关键词： healing clinical treatment

Microstructure, Residual Strain and Stress Corrosion Cracking Behavior in 316L Heat-Affected Zone

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Acta Metallurgica Sinica(English Letters) 2016年第9期29卷 848-858页

作者： Hong-Liang Ming zhi-Ming Zhang peng-Yuan Xiu Jian-Qiu Wang En-Hou Han Wei Ke Ming-Xing Su Key Laboratory of Nuclear Materials and Safety Assessment Liaoning Key Laboratory for Safety and Assessment Technique of Nuclear Materials Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China University of Chinese Academy of Sciences Beijing 100049 China Shanghai Research Center for Weld and Detection Engineering Technique of Nuclear Equipment Shanghai 201306 China

Austenitic stainless steels are usually chosen to make many components of nuclear power plants （NPPs）. However, their microstructure in the heat-affected zone （HAZ） will change during the welding process. Some failures of the weld joints, mainly stress corrosion cracking （SCC）, have been found to be located in the HAZ. In this research, the microstructure, micro-hardness, residual strain and SCC behavior at different locations of the 316L HAZ cut from a safeend dissimilar metal weld joint were studied. However, traditional optical microscope observation could not find any microstructural difference between the HAZ and the base metal, higher residual strain and micro-hardness, and higher fraction of random high-angle grain boundaries were found in the HAZ than in the base metal when studied by using electron back-scattering diffraction scanning and micro-hardness test. What＇s more, the residual strain, the microhardness and the fraction of random grain boundaries decreased, while the fraction of coincidence site lattice grain boundaries increased with increasing the distance from the fusion boundary in 316L HAZ. Creviced bent beam test was applied to evaluate the SCC susceptibility at different locations of 316L HAZ and base metal. It was found that the HAZ had higher SCC susceptibility than the base metal and SCC resistance increased when increasing the distance from the fusion boundary in 316L HAZ.

关键词： Austenitic stainless steels Heat.affected zone Microstructure EBSD Residual strain Stresscorrosion cracking