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Percutaneous portal venoplasty and stenting for anastomotic stenosis after liver transplantation

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World Journal of Gastroenterology 2009年第15期15卷 1880-1885页

作者： Bao-Jie Wei Ren-You zhai Jian-Feng Wang Ding-Ke Dai Ping Yu Department of Radiology Beijing Chaoyang HospitalCapital Medical University Beijing 100020 China

AIM:To review percutaneous transhepatic portal venoplasty and stenting(PTPVS)for portal vein anastomotic stenosis(PVAS)after liver transplantation (LT). METHODS:From April 2004 to June 2008,16 of 18 consecutive patients(11 male and 5 female;aged 17-66 years,mean age 40.4 years)underwent PTPVS for *** occurred 2-10 mo after LT(mean 5.0 mo). Three asymptomatic patients were detected on routine screening color Doppler ultrasonography(CDUS). Fifteen patients who also had typical clinical signs of portal hypertension(PHT)were identified by contrastenhanced computerized tomography(CT)or magnetic resonance *** procedures were performed under local *** there was a PVAS75%stenosis and typical clinical signs of *** a 51-year-old woman,who suffered from massive ascites and severe bilateral lower limb edema after secondary LT,PVAS complicated hepatic vein stenosis and inferior vena cava(IVC)stenosis. Before PTPVS,a self-expandable and a balloonexpandable metallic stent were deployed in the IVC and right hepatic vein *** ascites and edema resolved gradually after *** portosystemic collater

关键词：吻合口狭窄肝移植术后支架成形术治疗后门静脉高压症彩色多普勒超声无症状病人内支架置入术

学术打假何以成为国家行动——基于多源流理论的分析

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现代大学教育 2022年第5期38卷 15-26,112,F0003页

作者：莫甲凤杨雯中南大学高等教育研究所长沙410083

多源流理论自20世纪80年代起被广泛用于分析政策议程设置问题。当问题源流、政策源流、政治源流在关键点达到紧密耦合状态,政策之窗随之开启,公共问题被提上正式的政策议程。中国学术打假经过从冷处理阶段到制度化阶段的演变,最后上升... 详细信息

多源流理论自20世纪80年代起被广泛用于分析政策议程设置问题。当问题源流、政策源流、政治源流在关键点达到紧密耦合状态,政策之窗随之开启,公共问题被提上正式的政策议程。中国学术打假经过从冷处理阶段到制度化阶段的演变,最后上升为一场国家层面的行动,是上述三条源流共同作用的结果。学术造假事件引发公众对教育公平的质疑,论文代写代发形成黑色产业链,构成问题源流;高校及相关行业学会的实践探索、专家学者的研究建议以及政府和教育主管部门的政策支持构成政策源流;执政党立德树人的教育理念、意识形态和国民情绪的变化构成政治源流。“翟某某学术门”作为触发机制,加速了三条源流的汇合,开启了国家出拳重击学术造假的政策之窗。

关键词：多源流理论学术打假国家行动政策议程学术诚信立德树人

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Structures and aromaticity of the planar Al_2P_2^(n-) (n=1―4) clusters

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Science China Chemistry 2009年第12期52卷 2237-2242页

作者： XU WenGuo,ZHANG YuanChun & zhai Lei Institute of Chemical Physics,Beijing Institute of Technology,Beijing 100081,China Institute of Chemical Physics Beijing Institute of Technology Beijing China

Clusters Al2P2n-(n = 1―4) were theoretically investigated using density functional theory (DFT) methods at the B3LYP/6-311+G* and B3PW91/6-311+G* levels of theory. The calculated results showed that the planar structure (D2h symmetry) of Al2P2n-(n = 1―4) species was the global minimum. And the negative nucleus-independent chemical shift (NICS) value of Al2P2n-(n = 1―4) species indicated the existence of a ring current in the planar structure (D2h symmetry). A detailed molecular orbital (mo) analysis revealed that the planar structures (D2h symmetry) had π aromaticity,which further exhibited the strongly aromatic character for Al2P2n-(n = 1―4) species.

关键词： DFT calculation geometric structure nucleus-independent chemical shift molecular orbital

Hot tearing susceptibility of Fe-20.96Cr-2.13Ni-0.15N-4.76Mn-0.01mo duplex stainless steel

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Journal of Iron and Steel Research(International) 2017年第4期24卷 421-425页

作者： Zhi-qiang Wei Xiang-ru Chen Hong-gang Zhong Qi-jie zhai Gang Wang State Key Laboratory of Advanced Special Steel&Shanghai Key Laboratory of Advanced Ferrometallurgy&School of Materials Science and Engineering Shanghai UniversityShanghai 200072China

The hot tearing susceptibility of a Fe-20.96Cr-2.13Ni-0.15N-4.76Mn-0.01 mo duplex stainless steel was investigated using method of constrained solidification shrinkage in one *** apparatus for realtime measuring the contraction stress and temperature during solidification was developed,which can achieve the in-situ observation of melting and solidification and avoid the large temperature gradient of casting under the condition of *** results show that the contraction stress increases significantly when the core temperature of casting reaches the liquidus *** contraction stress is released when the core temperature of casting reaches 1456°*** this temperature,the hot tearing susceptibility of duplex stainless steel is the *** decreasing the core temperature to 1363°C,the slope of contraction stress increases,which is related to the ferrite-to-austenite transformation.

关键词： Duplex stainless steel Hot tearing Solidification Contraction stress Core temperature

微生物群滋养性免疫在结直肠癌发生发展中的作用

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中国肿瘤 2022年第3期31卷 221-227页

作者：王磊翟嘉威唐末顾知恩张彤陈悦杨宇飞中国中医科学院西苑医院北京100091 北京中医药大学北京100029

微生物群滋养性免疫通过抑制肠道有害细菌、真菌的定植和异常扩张,在维持人体肠道微生物稳态、正常肠上皮细胞完整性及重塑宿主免疫系统中发挥了极其重要的作用。肠道微生物稳态的破坏及致病微生物的异常扩张所介导的炎症微环境及免疫... 详细信息

微生物群滋养性免疫通过抑制肠道有害细菌、真菌的定植和异常扩张,在维持人体肠道微生物稳态、正常肠上皮细胞完整性及重塑宿主免疫系统中发挥了极其重要的作用。肠道微生物稳态的破坏及致病微生物的异常扩张所介导的炎症微环境及免疫功能异常已被反复证实与结直肠癌的发生发展具有紧密的联系。全文就微生物群滋养性免疫在抑制结直肠癌发生发展中的作用进行综述,并解释其中关键的作用机制。

关键词：微生物群滋养性免疫微生物稳态肠上皮完整炎症微环境宿主免疫结直肠癌

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基于Laplace法的磁性球体参数确定

地球物理学报 2011年第3期54卷 787-792页

作者：卞光浪翟国君刘雁春黄谟涛海军大连舰艇学院海测工程系大连116018 海军海弹测绘研究所天津300061

解析信号法被广泛应用于磁性目标平面位置确定中,然而,数值计算表明:斜磁化情况下,解析信号模极大值与磁性目标中心平面位置之间存在较大的偏差,最大可达探测深度的30%,从而制约了该方法在航空磁测或水深较深区域的应用.从理论上推导了... 详细信息

解析信号法被广泛应用于磁性目标平面位置确定中,然而,数值计算表明:斜磁化情况下,解析信号模极大值与磁性目标中心平面位置之间存在较大的偏差,最大可达探测深度的30%,从而制约了该方法在航空磁测或水深较深区域的应用.从理论上推导了磁性球体磁异常经拉普拉斯算子运算后信号(简称"拉普拉斯信号")表达式,分析了其具有的物理性质,在此基础上,提出采用Laplace法确定磁性目标中心平面位置,当地磁场与磁化强度倾角相同且大于30°时,仿真计算的磁性球体平面位置误差小于深度的4.3%,大大提高了平面位置的计算精度.此外,还给出了磁性目标的深度和磁性参数的计算方法.仿真结果表明,当磁性球体空间位置确定较为准确时,计算出的磁性球体空间位置与磁性参数和实际值较为相符.

关键词：磁性目标探测 Laplace法解析信号法球体模型

Study of glue extrusion after endoscopic N-butyl-2-cyanoacrylate injection on gastric variceal bleeding

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World Journal of Gastroenterology 2009年第39期15卷 4945-4951页

作者： Yan-Mei Wang Liu-Fang Cheng Nan Li Kai Wu Jun-Shan zhai Ya-Wen Wang Department of Gastroenterology the Second Affiliated Hospital of PLA General Hospital Beijing 100091 China

AIM:To investigate glue extrusion after endoscopic N-butyl-2-cyanoacrylate injection on gastric variceal bleeding and to evaluate the long-term efficacy and safety of this ***:A total of 148 cirrhotic patients in our hospital with esophagogastric variceal bleeding(EGVB) were included in this study.N-butyl-2-cyanoacrylate was mixed with lipiodol in a 1:1 ratio and injected as a bolus of 1-3 mL according to variceal *** underwent endoscopic follow-up the next week,fourth week,second month,fourth month,and seventh month after injection and then every 6 mo to determine the cast *** abdominal X-ray fi lm and ultrasound or computed tomographic scan were also carried out in order to evaluate the time of variceal disappearance and complete extrusion of the *** average follow-up time was 13.1 ***:The instantaneous hemostatic rate was 96.2%.Early re-bleeding after injection in 9 cases(6.2%) was estimated from rejection of *** re-bleeding occurred in 12 patients(8.1%) at 2-18 *** glue cast was extruded into the lumen within one month in 86.1% of patients and eliminated within one *** erosion was seen at the injection position and mucosa edema in the second *** glue casts were extruded in 18 patients(12.1%) after one week and in 64 patients(42.8%) after two *** kinds of glue clumping shapes and colors on endoscopic examination were observed in 127 patients(86.1%) within one month,including punctiform,globular,pillar and *** one patients(27.9%) had glue extrusion after 3 mo and 28 patients(28.9%) after six *** extrusion time was not related to the injection volume of *** was seen in 70.2%(104 cases) *** main complication was re-bleeding resulting from *** prognosis of the patients depended on the severity of the underlying liver ***:Endoscopic injection of cyanoacrylate is highly effective for gastric varices *** glue clump

关键词：内窥镜检查胃疾病治疗临床

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天基海表精细探测微波载荷性能分析与展望

上海航天（中英文） 2023年第6期40卷 45-53页

作者：崔新东王洋郭海龙翟宇梅磨礼平北京应用气象研究所北京100029 国防科技大学气象海洋学院长沙410199

海表精细探测是海洋卫星未来发展的重要方向。介绍卫星海表参数探测的特点与优势,总结海表温度、海表高度、海表盐度等要素,分析天基探测载荷的发展现状。根据海表参数时空变化特性,分析高时空分辨率微波探测载荷性能需求。在此基础上,... 详细信息

海表精细探测是海洋卫星未来发展的重要方向。介绍卫星海表参数探测的特点与优势,总结海表温度、海表高度、海表盐度等要素,分析天基探测载荷的发展现状。根据海表参数时空变化特性,分析高时空分辨率微波探测载荷性能需求。在此基础上,针对美国和欧洲相关卫星系统发展计划,分析了高时空分辨率、高精度天基微波探测载荷可实现性与未来发展趋势,针对海表精细探测天基微波载荷的发展提出了建议。

关键词：海表温度海表高度海表盐度高时空分辨率天基微波载荷

Successful management of tubular colonic duplication using a laparoscopic approach: A case report and review of the literature

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World Journal of Clinical Cases 2020年第15期8卷 3291-3298页

作者： Gan-Bin Li Jia-Gang Han Zhen-Jun Wang Zhi-Wei zhai Yu Tao Department of General Surgery Beijing Chaoyang HospitalCapital Medical UniversityBeijing 100020China

BACKGROUND Alimentary duplication is a rare congenital disease with a reported incidence of 1 per 4500 persons,although the exact incidence has been difficult to *** to previous reports,the most common site of duplication is the ileum,and colonic duplication is *** to different types and locations of the duplication,the manifestations are varied,which makes establishing an accurate diagnosis before surgery a *** SUMMARY A 17-year-old female patient sought evaluation in our department with constipation and chronic abdominal pain for 12 years;she had difficulty defecating and had dry stools since she was a *** abdominal computed tomography revealed two extremely enlarged loops of bowel full of stool-like intestinal contents in the left lower abdomen,which led us to consider the possibility of colonic duplication.A laparoscopic exploration was performed,which revealed a tubular duplicated colon that shared a common opening with the transverse colon.A left hemi-colectomy was performed with a side-to-side *** pathologic results confirmed the *** the 6-mo followup,the patient was doing well without constipation or abdominal *** Colonic duplication is a rare alimentary abnormality in *** to the nonspecific manifestations and low incidence,it is usually difficult to make an accurate diagnosis *** is the mainstay of treatment,even though some patients are asymptomatic.

关键词： Colonic duplication Diagnosis Laparoscopy Case report