检索结果-南通市图书馆

Effect of GaInP and GaAsP inserted into waveguide/barrier interface on carrier leakage in InAlGaAs quantum well 808-nm laser diode

在线全文

学校读者我要写书评

暂无评论

中国光学(中英文) 2025年第1期18卷 186-197页

作者： FU Meng-jie DONG Hai-liang JIA Zhi-gang JIA Wei LIANG jian xu Bing-she Key Laboratory of Interface Science and Engineering in Advanced Materials Ministry of EducationTaiyuan University of TechnologyTaiyuan 030024China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan 030024China College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China Institute of Atomic and Molecular Science Shaanxi University of Science&TechnologyXi’an 710021China

There is nonradiative recombination in waveguide region owing to severe carrier leakage,which in turn reduces output power and wall-plug *** this paper,we designed a novel epitaxial structure,which suppresses carrier leakage by inserting n-Ga_(0.55)In_(0.45)P and p-GaAs_(0.6)P_(0.4) between barriers and waveguide layers,respectively,to modulate the energy band structure and to increase the height of *** results show that the leakage current density reduces by 87.71%,compared to traditional *** nonradiative recombination current density of novel structure reduces to 37.411 A/cm^(2),and the output power reaches 12.80 W with wall-plug efficiency of 78.24%at an injection current density 5 A/cm^(2) at room *** addition,the temperature drift coefficient of center wavelength is 0.206 nm/℃at the temperature range from 5℃to 65℃,and the slope of fitted straight line of threshold current with temperature variation is *** novel epitaxial structure provides a theoretical basis for achieving high-power laser diode.

关键词： 808-nm laser diode Ga_(0.55)In_(0.45)P and GaAs_(0.6)P_(0.4)insertion layers InAlGaAs quantum well carrier leakage

Clinicopathological differences between patients with schistosomal appendicitis and non schistosomal appendicitis:A retrospectively study of past ten years

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2025年第2期13卷 24-32页

作者： Xiao-Yi Wang Yao Hao Zi-jian Wang Xiu-Liang xu jiang-Hua Yang Department of Infectious Diseases The First Affiliated of Wannan Medical CollegeWuhu 241001Anhui ProvinceChina

BACKGROUND Chronic schistosomiasis causes multiple organ and multiple system diseases,especially the digestive *** eggs are mainly deposited in the stomach,liver and colorectal,but a few eggs are deposited in the appendix and cause *** present,there are few studies on schistosomal *** To explore the differences in epidemiological,clinical and pathological characteristics between schistosomal appendicitis and non-schistosomal appendicitis over the past decade in order to assess the impact of schistosomiasis on *** The differences of general data,clinical data and laboratory examination data of patients with appendicitis from October 2013 to October 2023 were retrospectively *** patients were divided into two groups for *** were 136 patients in schistosomal appendicitis group and 5418 patients in non-schistosomal appendicitis *** Schistosomal appendicitis accounted for 2.45%of all patients with appendicitis,and the annual proportion in the past decade was 2.2%,2.9%,1.8%,1.9%,3.4%,3.1%,1.9%,1.6%,3%,2.6%,*** prevalence of schistosomal appendicitis was middle-aged and elderly males,with an average age of 61.73±15.335 *** main population of non-schistosomal appendicitis was middle-aged men,with an average age of 35.8±24.013 years(P<0.001).The distribution of pathological types of appendicitis was different between the two groups(P<0.001).The incidence of acute suppurative appendicitis in non-schistosomal appendicitis was higher than that in schistosomal appendicitis[odds ratio(OR)=0.504;95%confidence interval(CI):0.349-0.728;P<0.001].The proportion of acute attack of chronic appendicitis in schistosomal appendicitis was higher than that in non-schistosomal appendicitis(OR=2.614;95%CI:1.815-3.763;P<0.001).The proportion of schistosomal appendicitis patients complicated with colorectal cancer was higher than that of nonschistosomal appendicitis patients(OR=5.087;95%CI:1.427-

关键词： Schistosomal appendicitis Schistosomiasis Appendix Colorectal cancer Clinicopathological characteristics

Prognostic model for esophagogastric variceal rebleeding after endoscopic treatment in liver cirrhosis: A Chinese multicenter study

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2025年第2期31卷 85-101页

作者： Jun-Yi Zhan Jie Chen Jin-Zhong Yu Fei-Peng xu Fei-Fei Xing De-Xin Wang Ming-Yan Yang Feng Xing jian Wang Yong-Ping Mu Cell Biology Laboratory Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese MedicineShanghai 201203China Institute of Liver Diseases Shanghai Academy of Chinese MedicineShanghai 201203China Clinical Key Laboratory of Traditional Chinese Medicine of Shanghai Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese MedicineShanghai 201203China Key Laboratory of Liver and Kidney Disease of the Ministry of Education Shanghai University of Traditional Chinese MedicineShanghai 201203China Department of Gastroenterology and Hepatology Zhongshan Hospital Affiliated to Fudan UniversityShanghai 200032China Shanghai Institute of Liver Disease Fudan UniversityShanghai 200032China Evidence-Based Medicine Center Fudan UniversityShanghai 200032China Department of Gastrointestinal Endoscopy Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese MedicineShanghai 201203China Department of Hepatology Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese MedicineShanghai 201203China

BACKGROUND Rebleeding after recovery from esophagogastric variceal bleeding(EGVB)is a severe complication that is associated with high rates of both incidence and *** its clinical importance,recognized prognostic models that can effectively predict esophagogastric variceal rebleeding in patients with liver cirrhosis are *** To construct and externally validate a reliable prognostic model for predicting the occurrence of esophagogastric variceal *** This study included 477 EGVB patients across 2 cohorts:The derivation cohort(n=322)and the validation cohort(n=155).The primary outcome was rebleeding events within 1 *** least absolute shrinkage and selection operator was applied for predictor selection,and multivariate Cox regression analysis was used to construct the prognostic *** validation was performed with bootstrap *** assessed the discrimination,calibration and accuracy of the model,and performed patient risk *** Six predictors,including albumin and aspartate aminotransferase concentrations,white blood cell count,and the presence of ascites,portal vein thrombosis,and bleeding signs,were selected for the rebleeding event prediction following endoscopic treatment(REPET)*** predicting rebleeding within 1 year,the REPET model ex-hibited a concordance index of 0.775 and a Brier score of 0.143 in the derivation cohort,alongside 0.862 and 0.127 in the validation ***,the REPET model revealed a significant difference in rebleeding rates(P<0.01)between low-risk patients and intermediate-to high-risk patients in both *** We constructed and validated a new prognostic model for variceal rebleeding with excellent predictive per-formance,which will improve the clinical management of rebleeding in EGVB patients.

关键词： Esophagogastric variceal bleeding Variceal rebleeding Liver cirrhosis Prognostic model Risk stratification Secondary prophylaxis

白细胞介素-33对肝癌细胞迁移、侵袭能力和细胞骨架的影响

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

东南大学学报（医学版） 2018年第3期37卷 365-371页

作者：李凡夏兵祥徐健张业伟南京医科大学附属肿瘤医院普外科江苏南京210009

目的:探讨白细胞介素(IL)-33对肝癌细胞迁移能力、侵袭能力和细胞骨架的影响及其作用机制。方法:通过蛋白质印迹法检测肝癌细胞中β-链蛋白、基质金属蛋白酶(MMP)-2以及MMP-9蛋白表达水平,流式细胞仪分析肝癌细胞表面抗原分子的表达水平... 详细信息

目的:探讨白细胞介素(IL)-33对肝癌细胞迁移能力、侵袭能力和细胞骨架的影响及其作用机制。方法:通过蛋白质印迹法检测肝癌细胞中β-链蛋白、基质金属蛋白酶(MMP)-2以及MMP-9蛋白表达水平,流式细胞仪分析肝癌细胞表面抗原分子的表达水平,附壁试验和细胞聚集试验分别检测肝癌细胞对细胞外基质的亲和力以及肝癌细胞的聚集能力,细胞迁移划痕实验和穿透小室法测定IL-33对肝癌细胞体外迁移侵袭能力的影响,高内涵细胞分析系统免疫荧光法检测IL-33对肝癌细胞骨架的影响。结果:在IL-33的作用下,肝癌细胞中β-链蛋白、MMP-2以及MMP-9蛋白的表达均显著下降(P<0.05),并有剂量和时间依赖性。与对照组相比,经IL-33作用后肝癌细胞间黏附分子-1、人类白细胞抗原-Ⅰ的表达率显著增加,且CD44表达显著下降(P<0.05);肝癌细胞对细胞外基质的亲和力及肝癌细胞聚集程度均降低(P<0.05);实验组肝癌细胞的微丝数量和细胞骨架的面积显著降低,且与剂量相关(P<0.05)。结论:IL-33能够有效抑制肝癌细胞的迁移和侵袭,并且有降低细胞骨架微丝数量和面积的作用。

关键词：白细胞介素-33 肝癌细胞细胞迁移侵袭细胞骨架

在线全文

学校读者我要写书评

暂无评论

基于数据融合的圆锥滚子端面侧摆自动检测

机床与液压 2005年第9期33卷 114-116页

作者：卢胜利祝玲王福平梁伟昌许建业上海大学机电工程与自动化学院上海200072 西北第二民族学院银川750021 西北轴承股份有限公司银川750021

本文介绍的圆锥滚子端面侧摆自动检测系统,采用多周期检测和数据融合处理方法,能够有效滤除采样中的干扰信号、提高端面侧摆检测的准确性。实际使用结果表明,该系统符合圆锥滚子轴承检测规程,可以实现圆锥滚子端面侧摆自动检测和自动分拣。

关键词：自动检测数据融合圆锥滚子端面侧摆

在线全文

学校读者我要写书评

暂无评论

地质分析法在隧道岩溶探测中的应用

湖南城市学院学报（自然科学版） 2013年第2期22卷 15-19页

作者：柳治国乔东华徐建业贵州省交通规划勘察设计研究院股份有限公司贵阳550001

在碳酸盐岩地区隧道施工过程中,岩溶地质灾害是常见的地质灾害,往往造成重大经济损失及人员伤亡.地质分析法是隧道施工地质预报的1种基本方法,也是所有采用地球物理探测方法进行隧道施工地质预报的基础.结合具体工程实践,在对碳酸盐岩... 详细信息

在碳酸盐岩地区隧道施工过程中,岩溶地质灾害是常见的地质灾害,往往造成重大经济损失及人员伤亡.地质分析法是隧道施工地质预报的1种基本方法,也是所有采用地球物理探测方法进行隧道施工地质预报的基础.结合具体工程实践,在对碳酸盐岩发育地区岩溶发育条件及发育规律总结归纳的基础上,采用地质分析法,通过对杭瑞高速公路毕都段街上隧道所揭露的岩性、构造、地形及附加岩溶发育情况等进行调查与分析,得出岩溶发育的重点区域,并在实际开挖当中得以验证.

关键词：地质分析法岩溶岩溶发育规律街上隧道

在线全文

学校读者我要写书评

暂无评论

塘河地区蚕豆田化学除草的研究

青海农林科技 2019年第1期 70-72页

作者：许生福许建业王发财罗海利青海省海南州农业技术推广站青海共和813099

蚕豆是养人、养畜、养地作物,但是蚕豆田草害防治一直是突出问题。在海南州塘河地区蚕豆田用3种处理方式进行杂草防治试验,结果表明,用45%二甲戊灵、48%灭草松、10.8%高效盖草能三种化学药剂综合防治,平均防效达99.75%,防治效果明显,可... 详细信息

蚕豆是养人、养畜、养地作物,但是蚕豆田草害防治一直是突出问题。在海南州塘河地区蚕豆田用3种处理方式进行杂草防治试验,结果表明,用45%二甲戊灵、48%灭草松、10.8%高效盖草能三种化学药剂综合防治,平均防效达99.75%,防治效果明显,可以在蚕豆田生产中推广应用。

关键词：蚕豆化学除草塘河地区防治

As-cast Ti_(x)(AlVCr)_(100−x)light-weight medium entropy alloys with high strength and uniform compressive plasticity

在线全文

学校读者我要写书评

暂无评论

Transactions of Nonferrous Metals Society of China 2025年第1期35卷 194-206页

作者： Ming-jie KAI Yu-jie MA Xiao-tian WANG Liang CHENG jian-bo HU Yao-yao HU Tai-ran xu Gui-jiang LI Xiang-kang MENG Zhen-hua CAO College of Materials Science and Engineering Nanjing Tech UniversityNanjing 210009China School of Intelligent Manufacturing and Information Jiangsu Shipping CollegeNantong 226010China Laboratory for Shock Wave and Detonation Physics Institute of Fluid PhysicsChina Academy of Engineering PhysicsMianyang 621900China National Laboratory of Solid State Microstructures College of Engineering and Applied SciencesNanjing UniversityNanjing 210093China

The effect of Ti content on the microstructure and mechanical properties of as-cast light-weight Ti_(x)(AlVCr)_(100−x)medium entropy alloys was studied by compressive tests,X-ray diffraction,scanning electron microscopy and transmission electron *** results suggest that yield strength increases and then decreases with the increment of Ti *** Ti_(60)(AlVCr)_(40)alloy has the best combination of high strength of 1204 MPa and uniform plastic strain of 70%,possessing a high specific yield strength of 255 MPa·cm^(3)/*** enhancement of strength is mainly attributed to the synergic effects of solid-solution and coherent nano-precipitation strengthening,while dislocation motion such as dislocation pinning,entanglement and dislocation cells significantly increases the strain-hardening capacity.

关键词： TiAlVCr medium entropy alloy solid solution strengthening b2 precipitate strain hardening behavior

面向区域电网保供应场景的跨区最大购电能力优化方法

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

电网技术 2025年第1期49卷 232-241,I0086-I0087页

作者：徐浩贾龙文刘志成徐箭黄彦博廖思阳国家电网有限公司华中分部湖北省武汉市430077 武汉大学电气与自动化学院湖北省武汉市430072

随着多级电力市场在不同时间尺度上交织耦合,区域电网在发挥交易通道枢纽作用的同时,也出现了网络阻塞、安全保供等一系列运行风险。针对市场化模式下的保供应场景,基于省内断面阻塞分析,提出了面向电力现货市场的跨区跨省供电支撑能力... 详细信息

随着多级电力市场在不同时间尺度上交织耦合,区域电网在发挥交易通道枢纽作用的同时,也出现了网络阻塞、安全保供等一系列运行风险。针对市场化模式下的保供应场景,基于省内断面阻塞分析,提出了面向电力现货市场的跨区跨省供电支撑能力优化方法。首先,基于省间交易通道-省间物理联络线-省内输电断面的关联关系模型,分析了省内网络阻塞形成机理;其次,通过梯度提升树算法预测省内断面阻塞情况,选择目标断面形成现货市场购电边界;最后,以跨区通道购电量最大为优化目标,考虑断面阻塞和直流馈入稳定约束,对目标省份供电支撑能力进行了优化。以实际省网为基础进行了分析,验证了所提方法的有效性。

关键词：电力现货市场供电支撑网络阻塞梯度提升树直流馈入稳定