检索结果-南通市图书馆

Primary repair of esophageal atresia gross type C via thoracoscopic magnetic compression anastomosis:A case report

World Journal of Gastrointestinal Surgery 2023年第12期15卷 2919-2925页

作者： Hong-Ke Zhang Xiao-Quan Li Hong-Xia Song Shi-Qi Liu Fang-Hui Wang Jian Wen Mi Xiao A-Ping Yang Xu-Feng Duan zhen-zhen Gao Kai-Lun Hu Wei Zhang Yi Lv Xi-Hui Zhou zhen-jie cao Department of Pediatric Surgery The First Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710061Shannxi ProvinceChina Department of Neonatology The First Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710061Shannxi ProvinceChina Department of Neonatal Surgery Xi’an Children’s HospitalXi’an 710003Shannxi ProvinceChina Department of Anesthesiology The First Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710061Shannxi ProvinceChina Department of Hepatobiliary Surgery The First Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710061Shannxi ProvinceChina

BACKGROUND Esophageal atresia(EA)is a life-threatening congenital malformation in newborns,and the traditional repair approaches pose technical challenges and are extremely ***,surgeons have been actively investigating new minimally invasive techniques to address this *** compression anastomosis has been reported in several studies for its potential in repairing *** this paper,the primary repair of EA with magnetic compression anastomosis under thoracoscopy was *** SUMMARY A full-term male weighing 3500 g was diagnosed with EA gross type *** magnetic devices used in this procedure consisted of two magnetic rings and several *** fistula ligation and two purse strings were *** magnetic compression anastomosis was then completed *** the primary repair,no additional operation was conducted.A patent anastomosis was observed on the 15th day postoperatively,and the magnets were removed on the 23rd *** leakage existed when the transoral feeding *** Thoracoscopic magnetic compression anastomosis may be a promising minimally invasive approach for repairing EA.

关键词： Congenital esophageal atresia Minimal invasive surgery Thoracoscopic repair Magnetic compression anastomosis Primary repair Case report

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Constructing 2D bismuth-based heterostructure for highly efficient photocatalytic CO2 reduction

引用

Tungsten 2025年第1期7卷 71-79页

作者： Ruo-Hang Xu Hao-Yu Jiang Dan-Dan Cui Kun-Rong Du Hong-Run Zhang Sheng-jie Xu Ya-Qi Li Zhi-zhen Ren Liang Wang Wei-Chang Hao Yi Du School of Physics and BUAA-UOW Joint Research Centre Beihang University Shenzhen Institute of Beihang University Centre for Catalysis and Clean Energy School of Environment and Science Griffith University

Reforming carbon dioxide（CO2） into fuels and valuable chemicals using solar energy holds significant potential for emission reduction and addressing energy supply *** recombination of photocarriers remains a major obstacle,however,to enhancing solar energy conversion efficiency in the photocatalytic reaction *** two-dimensional materials,constructing heterogeneous structures has emerged as an effective strategy to enhance the separation of photoexcited carriers by leveraging the internal electric field at the heterogeneous ***,we present a facile strategy for preparing Bi4NbO8Br/Bi2WO6plate-on-plate Z-scheme junctions with a strong internal electric field by in situ *** unique heterostructure facilitates efficient separation and transport of photoexcited charges by harnessing the internal electric field induced by chemical bonding at the lateral ***,the Bi4NbO8Br/Bi2WO6heterostructure exhibits enhanced CO2photoreduction properties,along with a CO yield rate of approximately 35 μmol·g-1·h-1under full light *** work offers novel insights into the synthesis of unique hetero structures intended to enhance the efficiency of photocatalytic CO2reduction.

关键词： Bi4NbO8Br/Bi2WO6 CO2 reduction Heterostructures Photocatalysts

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

比值辐射计空间环境适应性设计及验证

引用

光子学报 2016年第11期45卷 160-166页

作者：李孟凡邹鹏孙真金洁曹兴家黄文薪洪津司孝龙乔延利中国科学院安徽光学精密机械研究所合肥230031 中国科学技术大学合肥230026 中国科学院通用光学定标与表征技术重点实验室合肥230031

结合卫星发射以及在轨运行过程中所处的环境条件,对"积分球+匀光板+电磁光开关"形式的比值辐射计进行空间环境适应性设计.对结构薄弱环节进行强化加固设计,通过降低器件功耗、表面热处理等方式保持比值辐射计在真空热环境下的温度稳定,... 详细信息

结合卫星发射以及在轨运行过程中所处的环境条件,对"积分球+匀光板+电磁光开关"形式的比值辐射计进行空间环境适应性设计.对结构薄弱环节进行强化加固设计,通过降低器件功耗、表面热处理等方式保持比值辐射计在真空热环境下的温度稳定,采用航天级光学涂层辅以结构屏蔽设计保证抗辐照能力.通过力学试验、热真空试验以及积分球光学涂层辐照试验进行验证.力学试验结果显示比值辐射计基频约为540Hz,振动前后比值辐射计辐射比变化小于0.31%,证明比值辐射计具有良好的结构稳定性,空间力学条件下的结构强度和刚度均满足基频大于100 Hz的设计要求.热真空试验过程中比值辐射计遥测输出稳定,各功能模块均工作正常.辐照试验后,比值辐射计光学涂层方向-半球反射比在485nm波段的最大衰变小于2%,红外波段无明显变化,该衰变对定标器在轨应用性能的影响可以忽略.研究结果表明,比值辐射计具有良好的空间环境适应性,可在复杂空间环境下进行稳定、可靠的工作,满足航天应用需求.

关键词：光学遥感星上定标环境试验比值辐射计力学热真空空间辐照

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

西宁市城市生态用地空间格局变化及其生态系统服务价值评估

引用

云南地理环境研究 2016年第4期28卷 56-62页

作者：甄少婕曹广超袁杰蒋刚青海省自然地理与环境过程重点实验室青海西宁810008 青海师范大学生命与地理科学学院青海西宁810008

于Landsat TM／80LI（2000年、2005年、2010年和2015年）4期遥感影像，应用人工目视解译和监督分类等遥感技术方法，揭示西宁市城市生态用地的空间结构变化，评估其生态系统服务价值。结果表明：2000—2015年间生态用地面积减少了15．2... 详细信息

于Landsat TM／80LI（2000年、2005年、2010年和2015年）4期遥感影像，应用人工目视解译和监督分类等遥感技术方法，揭示西宁市城市生态用地的空间结构变化，评估其生态系统服务价值。结果表明：2000—2015年间生态用地面积减少了15．2％，建设用地增加了113％；其中，建设用地和林地面积一直处于上升趋势，农田面积一直处于下降趋势，草地和水域面积在小幅度内波动，裸地面积在2005-2010年是上升趋势，从2010年开始迅速下降。15年间西宁市区生态用地的变化导致生态系统服务价值也发生了很大的变化，2000-2015年，西宁市区生态系统服务总价值降低了7．5％，其中农田所提供的生态系统服务价值降低最大，降低了56．3％。城市生态用地结构的变化导致生态系统服务价值的变化，而城市生态用地的变化主要受经济的发展、人口的增加以及政府出台政策的影响。

关键词：生态用地空间结构西宁市生态系统服务价值

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Viscosity and structure relationship with equimolar substitution of cao with MgO in the cao–MgO–Al_(2)O_(3)–SiO_(2)slag melts

引用

International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 70-79页

作者： Yong Hou Shuo Zhang jie Dang Jia Guo Hanghang Zhou Xuewei Lü College of Materials Science and Engineering Chongqing UniversityChongqing 400044China Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials Chongqing UniversityChongqing 400044China

Currently,the Al_(2)O_(3)content in the high-alumina slag systems within blast furnaces is generally limited to 16wt%–18.5wt%,making it challenging to overcome this *** most studies that concentrated on managing the MgO/Al_(2)O_(3)ratio or basicity,this paper explored the effect of equimolar substitution of MgO for cao on the viscosity and structure of a high-alumina cao-MgO-Al_(2)O_(3)-SiO_(2)slag system,providing theoretical guidance and data to facilitate the application of high-alumina *** results revealed that the viscosity first decreased and then increased with higher MgO substitution,reaching a minimum at 15mol%MgO *** transform infrared spectroscopy(FTIR)results found that the depths of the troughs representing[SiO_(4)]tetrahedra,[AlO_(4)]tetrahedra,and Si-O-Al bending became progressively deeper with increased MgO *** of the Raman spectra showed that the average number of bridging oxygens per Si atom and the X_(Q^(3))/X_(Q^(2))(X_(Q^(i))is the molar fraction of Q^(i) unit,and i is the number of bridging oxygens in a[SiO_(4)]tetrahedral unit)ratio increased from 2.30 and 1.02 to 2.52 and 2.14,respectively,indicating a progressive polymerization of the silicate structure.X-ray photoelectron spectroscopy(XPS)results highlighted that non-bridging oxygen content decreased from 77.97mol% to 63.41mol% with increasing MgO concentration,whereas bridging oxygen and free oxygen contents *** analysis demonstrated a gradual increase in the polymerization degree of the tetrahedral structure with the increase in MgO ***,bond strength is another important factor affecting the slag *** occurrence of a viscosity minimum can be attributed to the complex evolution of bond strengths of non-bridging oxygens generated during depolymerization of the[SiO_(4)]and[AlO_(4)]tetrahedral structures by cao and MgO.

关键词： aluminosilicate viscosity structure spectroscopy

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

西门塔尔牛与荷斯坦牛产后血液离子和相关血气指标的比较分析

引用

中国兽医杂志 2025年第1期61卷 80-85页

作者：魏子昂曹杰中国农业大学动物医学院北京海淀100193

为分析西门塔尔牛产后血液离子和相关血气指标的变化特点,本试验连续收集西门塔尔头胎牛40头和经产牛60头作为试验组,连续收集荷斯坦头胎牛40头和经产牛60头作为对照组,比较2个组牛血液离子和相关血气指标的差异。结果显示,西门塔尔头... 详细信息

为分析西门塔尔牛产后血液离子和相关血气指标的变化特点,本试验连续收集西门塔尔头胎牛40头和经产牛60头作为试验组,连续收集荷斯坦头胎牛40头和经产牛60头作为对照组,比较2个组牛血液离子和相关血气指标的差异。结果显示,西门塔尔头胎牛和经产牛产后0 h亚临床低血钙发病率分别为7.5%和53.3%,总发病率为35.0%;西门塔尔牛产后0 h平均血液pH为7.42±0.01,平均血糖浓度为(6.91±0.16)mmol/L;西门塔尔头胎牛和经产牛初乳产量分别为(2.30±0.28)和(5.14±0.36)L,平均初乳产量为(4.01±0.28)L。荷斯坦头胎牛和经产牛产后0 h亚临床低血钙发病率分别为5.0%和61.7%,总发病率为39.0%;荷斯坦牛产后0 h平均血液pH为7.39±0.01,平均血糖浓度为(5.76±0.15)mmol/L;荷斯坦头胎牛和经产牛初乳产量分别为(3.68±0.36)和(5.96±0.33)L,平均初乳产量为(5.05±0.25)L。2个组牛产后0 h血钠、血钾、红细胞压积和血红蛋白水平组间和组内胎次间均无显著差异(P>0.05)。结果表明,西门塔尔头胎牛亚临床低血钙发病率高于荷斯坦头胎牛,可能与品种或饲料相关。而西门塔尔经产牛产后0 h血液离子钙水平高于荷斯坦经产牛,产后低血钙发病风险较低。西门塔尔牛维持产后血液pH和血液离子稳态的能力较强,较荷斯坦牛具有更好的抗分娩应激能力。本试验为制定西门塔尔牛围产期饲养管理和产后补钙策略提供了参考依据。

关键词：西门塔尔牛低血钙离子钙血气指标

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

SG-NeRF:Sparse-Input Generalized Neural Radiance Fields for Novel View Synthesis

引用

Journal of Computer Science & Technology 2024年第4期39卷 785-797页

作者： Kuo Xu jie Li zhen-Qiang Li Yang-jie cao School of Cyber Science and Engineering Zhengzhou UniversityZhengzhou 450002China Intelligent Big Data System(iBDSys)Lab Shanghai Jiao Tong UniversityShanghai 200240China School of Computer and Artificial Intelligence Zhengzhou UniversityZhengzhou 450001China

Traditional neural radiance fields for rendering novel views require intensive input images and pre-scene optimization,which limits their practical *** propose a generalization method to infer scenes from input images and perform high-quality rendering without pre-scene optimization named SG-NeRF(Sparse-Input Generalized Neural Radiance Fields).Firstly,we construct an improved multi-view stereo structure based on the convolutional attention and multi-level fusion mechanism to obtain the geometric features and appearance features of the scene from the sparse input images,and then these features are aggregated by multi-head attention as the input of the neural radiance *** strategy of utilizing neural radiance fields to decode scene features instead of mapping positions and orientations enables our method to perform cross-scene training as well as inference,thus enabling neural radiance fields to generalize for novel view synthesis on unseen *** tested the generalization ability on DTU dataset,and our PSNR(peak signal-to-noise ratio)improved by 3.14 compared with the baseline method under the same input *** addition,if the scene has dense input views available,the average PSNR can be improved by 1.04 through further refinement training in a short time,and a higher quality rendering effect can be obtained.

关键词： Neural Radiance Fields(NeRF) multi-view stereo(MVS) new view synthesis(NVS)

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Characteristics of array of distributed synthetic jets and effect on turbulent boundary layer

引用

Acta Mechanica Sinica 2020年第6期36卷 1171-1190,I0001页

作者： Lianshan Lu Dong Li zhenghong Gao zhen cao Yu Bai jie zheng School of Aeronautics Northwestern Polytechnical UniversityXi’an710072China

An array of distributed round synthetic jets was used to control a fully developed turbulent boundary *** study focused on the related skin friction drag reduction and mechanisms *** control effects were analyzed by measuring the streamwise velocities using a hot-wire anemometer downstream of the array.A reduction in the skin friction was observed both in the regions downstream of the orifices and in the regions between two adjacent orifices.A statistical analysis with the variable-interval time-averaging(VITA)technique demonstrated a weakened bursting intensity with synthetic jet in the near-wall *** streamwise vortices were lifted by the upwash effect caused by synthetic jet and induced less low-speed *** control mechanism acted in a way to suppress the dynamic interaction between the streamwise vortices and low-speed streaks and to attenuate the turbulence production in the near-wall *** forcing frequency was found to be a more relevant parameter when synthetic jet was applied in turbulent boundary layer flow control.A higher forcing frequency induced a higher reduction in the skin *** power spectral density and autocorrelation of the fluctuating velocities showed that the synthetic jets gradually decayed in the streamwise direction,having an effect as far as 34.5 times the displacement thickness that was on the trailing edge of the distributed synthetic jets array.

关键词： Distributed synthetic jets Flow control Turbulent boundary layer Skin friction drag reduction Hot-wire

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Preparation and properties of a double quaternary ammonium copolymer used in acid fracturing

引用

Petroleum 2023年第2期9卷 265-273页

作者： jie cao Kun Liu Guobin Xu Chunlin Liu Weikun zhen Jia Wang College of Petroleum Engineering China University of Petroleum(East China)QingdaoChina

Triethylamine(TEA),1,4-dibromobutane(C4H8Br2)and N,N-dimethylaminopropyl acrylamide(DMAPAA)were selected to synthesize a double quaternary ammonium cationic monomer(TDD).TDD,acrylamide(AM),2-acrylamido-2-methylpropane sulfonic acid(AMPS)and acrylic acid(AA)were used to create a quadripolymer(PAAT)that was characterized by FT-IR and ^(1)H *** that,the basic performance of thickened acid was *** results revealed that PAAT outperformed PAA(copolymerized by AM,AMPS and AA)in terms of acid solubility,thickening performance,temperature resistance and shear ***,this crosslinked acid containing PAAT was subjected to a series of performance *** viscosity of the crosslinked acid could be kept at 67 mPa$s at 160C after 90 min and the weight loss rate of crosslinked acid in acid-rock reaction at 60 min was 23%,indicating the temperature resistance and retarder performance of the crosslinked acid solution was significantly better than that of the thickening acid and the blank acid.A scanning electron microscopy experiment revealed that crosslinked acid has good corrosion ability and low damage to the *** above experimental results indicated that the thickener PAAT has a promising future application in acid fracturing of high-temperature and high-mineralization carbonate reservoirs.

关键词： Diquaternary ammonium Thickening agent Crosslinked acid Cationic monomer Retardation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Synthesis and Langmuir-Blodgett Film Analysis of Atropisomers of “Picket Fence” Porphyrin

引用

Chemical Research in Chinese Universities 2010年第5期26卷 761-767页

作者： WANG Chao-wei REN Yu-jie cao zhen-feng CHEN Qi-bin School of Chemistry and Environmental Engineering Shanghai Institute of Technology Shanghai 200235 P. R. China School of Chemistry ＆ Molecular Engineering East China University of Science and Technology Shanghai 200237 P. R. China

Four ＂picket fence＂ porphyrin atropisomers were respectively synthesized from the four corresponding atropisomers of meso-tetra（o-aminophenyl）porphyrin that had been chromatographed on a column eluted with petroleum ether and ethyl acetate. Results show that each atropisomer could be successfully synthesized by controlling the acylation temperature at 0 ℃. They were characterized by 1H NMR, HRMS, IR, UV-Vis and Langmuir-Blodgett（LB） film analyses. Although the results of HRMS, IR, UV-Vis analyses indicate there is no remarkable difference among the atropisomers, the results of the 1H NMR and the mean molecular areas obtained by LB film technique imply that the atropisomers are significantly discrepant. The former shows that the chemical shifts of the methyl and amide protons of each atropisomer are distinct, while the later presents that the different atropisomer molecules can occupy the different surface areas at the air/water interface.

关键词： "Picket fence" porphyrin Atropisomer Langmuir-Blodgett(LB) film meso-Tetra(o-pivalamidophenyl)porphyrin

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：