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The Backup 2-Median Problem on Block Graphs

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Acta Mathematicae Applicatae Sinica 2014年第2期30卷 309-320页

作者： yu-kun cheng Li-ying KANG Hong YAN Zhejiang University of Finance and Economics Department of Mathematics Shanghai University Department of Logistics and Maritime Studies The Hong Kong Polytechnic University

The backup 2-median problem is a location problem to locate two facilities at vertices with the minimum expected cost where each facility may fail with a given probability. Once a facility fails, the other one takes full responsibility for the services. Here we assume that the facilities do not fail simultaneously. In this paper, we consider the backup 2-median problem on block graphs where any two edges in one block have the same length and the lengths of edges on different blocks may be different. By constructing a tree-shaped skeleton of a block graph, we devise an O（n log n q- m）-time algorithm to solve this problem where n and m are the number of vertices and edges, respectively, in the given block graph.

关键词： location theory backup median block graph

Laparoscopic liver resection utilizing the ventral avascular area of the inferior vena cava:A retrospective cohort study

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World Journal of Gastroenterology 2025年第1期31卷 42-57页

作者： kun Huang Zhu Chen Heng Xiao Hai-Yang Hu Xing-yu Chen cheng-You Du Xiang Lan Department of Hepatobiliary Surgery The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400000China Department of General Surgery Mianyang Hospital of Traditional Chinese MedicineMianyang 621000Sichuan ProvinceChina

BACKGROUND Laparoscopic liver resection(LLR)can be challenging due to the difficulty of establishing a retrohepatic tunnel under *** the third hepatic hilum before parenchymal transection often leads to significant liver mobilization,tumor compression,and bleeding from the short hepatic veins(SHVs).This study introduces a novel technique utilizing the ventral avascular area of the inferior vena cava(IVC),allowing SHVs to be addressed after parenchymal transection,thereby reducing surgical complexity and improving outcomes in in situ *** To introduce and evaluate a novel LLR technique using the ventral avascular area of the IVC and compare its short-term outcomes with conventional *** The clinical cohort data of patients with pathologically confirmed hepatocellular carcinoma or intrahepatic cholangiocarcinoma who underwent conventional LLR and novel LLR between July 2021 and July 2023 at the First Affiliated Hospital of Chongqing Medical University were retrospectively *** novel LLR,we initially separated the caudate lobe from the IVC using dissecting forceps along the ventral avascular area of the ***,we transected the parenchyma of the left and right caudate lobes from the caudal side to the cephalic side using the avascular area as a ***,we addressed the SHVs and finally dissected the root of the right hepatic vein or left hepatic *** short-term postoperative outcomes and oncological results of the two approaches were evaluated and *** A total of 256 patients were included,with 150(58.59%)undergoing conventional LLR and 106(41.41%)undergoing novel *** novel technique resulted in significantly larger tumor resections(6.47±2.96 cm vs 4.01±2.33 cm,P<0.001),shorter operative times(199.57±60.37 minutes vs 262.33±83.90 minutes,P<0.001),less intraoperative blood loss(206.92±37.09 mL vs 363.34±131.27 mL,P<0.001),and greater resection volume(345.11±31.40 mL vs 264.38±31.98 mL,P<0.001)comp

关键词： Laparoscopic liver resection Inferior vena cava Retrohepatic tunnel Short hepatic veins Complex liver tumors Intraoperative bleeding control

评估可视喉镜在急诊气管插管术中的临床价值和安全性

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智慧健康 2020年第34期6卷 91-92,100页

作者：余坤城深圳市龙岗区人民医院广东深圳518172

目的探究对急诊患者,要进行气管插管术,保证插管成功率,减少对患者的刺激,采用可视喉镜的应用价值和安全性。方法本研究共68例研究对象,均为急诊进行气管插管的患者,34例采用普通喉镜的患者为常规组,另34例采用可视喉镜的患者为研究组,... 详细信息

目的探究对急诊患者,要进行气管插管术,保证插管成功率,减少对患者的刺激,采用可视喉镜的应用价值和安全性。方法本研究共68例研究对象,均为急诊进行气管插管的患者,34例采用普通喉镜的患者为常规组,另34例采用可视喉镜的患者为研究组,所有患者选自2018年6月至2020年6月。比较分析插管时间、一次插管成功率以及不良反应的发生情况。结果在一次插管成功率和喉镜显露有效率上,研究组明显高于常规组;在插管时间上,研究组明显短于常规组;在不良反应发生率上,研究组明显低于常规组,差异具有统计学意义(P<0.05)。结论对急诊患者,要进行气管插管术,保证插管成功率,减少对患者的刺激,采用可视喉镜的应用价值高,可以有效减少不良反应,值得推广。

关键词：急诊气管插管术插管成功率可视喉镜应用价值安全性

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现代应用文类型划分中的几个认识问题

广播电视大学学报（哲学社会科学版） 2005年第4期 27-30页

作者：于成鲲上海大学上海200000

应用性文体的功能具有三种不同的特性。即区域使用功能、文类语体功能和本体功能。文体的功能是发展变化的。新文体不断产生,旧文体不断消失,现行文体的功能也在不断发生变化。应用文要以用为依据。要用得合适、用得得法、用得合体,用... 详细信息

应用性文体的功能具有三种不同的特性。即区域使用功能、文类语体功能和本体功能。文体的功能是发展变化的。新文体不断产生,旧文体不断消失,现行文体的功能也在不断发生变化。应用文要以用为依据。要用得合适、用得得法、用得合体,用是应用文的灵魂。

关键词：应用文文体类型

Relationship between longitudinal changes in lipid composition and ischemic stroke among hypertensive patients

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World Journal of Clinical Cases 2025年第4期13卷 18-27页

作者： cheng-cheng Wei yu-Qing Huang cheng-Hong yu Department of Cardiology Tongxiang First People's HospitalTongxiang 314500Zhejiang ProvinceChina Department of Cardiology Guangdong Cardiovascular InstituteGuangzhou 510080Guangdong ProvinceChina

BACKGROUND Dyslipidemia was strongly linked to stroke,however the relationship between dyslipidemia and its components and ischemic stroke remained *** To investigate the link between longitudinal changes in lipid profiles and dyslipidemia and ischemic stroke in a hypertensive *** Between 2013 and 2014,6094 hypertension individuals were included in this,and ischemic stroke cases were documented to the end of *** changes of lipid were stratified into four groups:(1)Normal was transformed into normal group;(2)Abnormal was transformed into normal group;(3)Normal was transformed into abnormal group;and(4)Abnormal was transformed into abnormal *** examine the link between longitudinal changes in dyslipidemia along with its components and the risk of ischemic stroke,we utilized multivariate Cox proportional hazards models with hazard ratio(HR)and 95%*** The average age of the participants was 62.32 years±13.00 years,with 329 women making up 54.0%of the *** the course of a mean follow-up of 4.8 years,143 ischemic strokes *** normal was transformed into normal group was used as a reference,after full adjustments,the HR for dyslipidemia and ischemic stroke among abnormal was transformed into normal group,normal was transformed into abnormal group and abnormal was transformed into abnormal Wei CC et *** changed and ischemic stroke WJCC https://*** 2 February 6,2025 Volume 13 Issue 4 group were 1.089(95%CI:0.598-1.982;P=0.779),2.369(95%CI:1.424-3.941;P<0.001)and 1.448(95%CI:1.002-2.298;P=0.047)(P for trend was 0.233),*** In individuals with hypertension,longitudinal shifts from normal to abnormal in dyslipidemia-particularly in total and low-density lipoprotein cholesterol-were significantly associated with the risk of ischemic stroke.

关键词： Longitudinal change Hypertension Dyslipidemia Lipid profile Ischemic stroke

A cellulose-based lithium-ion battery separator with regulated ionic transport and high thermal stability for extreme environments

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Nano Research 2025年第1期18卷 315-322页

作者： kun-Peng Yang Song Xie Zi-Meng Han Hao-cheng Liu Chong-Han Yin Wen-Bin Sun Zhang-Chi Ling Huai-Bin Yang De-Han Li Qing-Fang Guan Shu-Hong yu Department of Chemistry New Cornerstone Science LaboratoryInstitute of Biomimetic Materials&ChemistryAnhui Engineering Laboratory of Biomimetic MaterialsDivision of Nanomaterials&ChemistryHefei National Research Center for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefei 230026China Institute of Innovative Materials Department of Materials Science and EngineeringDepartment of ChemistrySouthern University of Science and TechnologyShenzhen 518055China

Separators play a critical role in lithium-ion ***,the restrictions of thermal stability and inferior electrical performance in commercial polyolefin separators significantly limit their applications under harsh ***,we report a cellulose-assisted self-assembly strategy to construct a cellulose-based separator massively and *** an ultrahigh ionic conductivity in electrolytes of 3.7 mS·cm^(-1) and the ability to regulate ion transport,the obtained separator is a promising alternative for high-performance lithium-ion *** addition,integrated with high thermal stability,the cellulose-based separator endows batteries with high safety at high temperatures,greatly expanding the application scenarios of energy storage devices in extreme environments.

关键词： lithium-ion batteries bio-inspired materials battery separators cellulose nanofiber ultrahigh ionic conductivity high safety

Gradient‑Layered MXene/Hollow Lignin Nanospheres Architecture Design for Flexible and Stretchable Supercapacitors

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Nano-Micro Letters 2025年第2期17卷 447-462页

作者： Haonan Zhang cheng Hao Tongtong Fu Dian yu Jane Howe Kaiwen Chen Ning Yan Hao Ren Huamin Zhai Jiangsu Provincial Key Lab of Sustainable Pulp and Paper Technology and Biomass Materials NanJing Forestry UniversityNanjing 210037People’s Republic of China Department of Chemical Engineering and Applied Chemistry University of Toronto200 College StreetTorontoON M5S 3E5Canada Department of Materials Science and Engineering University of Toronto184 College StreetTorontoON M5S 3E4Canada College of Materials Science and Engineering Nanjing Forestry UniversityNanjing 210037People’s Republic of China

With the rapid development of flexible wearable electronics,the demand for stretchable energy storage devices has *** this work,a novel gradient-layered architecture was design based on single-pore hollow lignin nanospheres(HLNPs)-intercalated two-dimensional transition metal carbide(Ti_(3)C_(2)T_(x) MXene)for fabricating highly stretchable and durable *** depositing and inserting HLNPs in the MXene layers with a bottom-up decreasing gradient,a multilayered porous MXene structure with smooth ion channels was constructed by reducing the overstacking of MXene ***,the micro-chamber architecture of thin-walled lignin nanospheres effectively extended the contact area between lignin and MXene to improve ion and electron accessibility,thus better utilizing the pseudocapacitive property of *** these strategies effectively enhanced the capacitive performance of the *** addition,HLNPs,which acted as a protective phase for MXene layer,enhanced mechanical properties of the wrinkled stretchable electrodes by releasing stress through slip and deformation during the stretch-release cycling and greatly improved the structural integrity and capacitive stability of the *** electrodes and symmetric flexible all-solid-state supercapacitors capable of enduring 600%uniaxial tensile strain were developed with high specific capacitances of 1273 mF cm^(−2)(241 F g^(−1))and 514 mF cm^(−2)(95 F g^(−1)),***,their capacitances were well preserved after 1000 times of 600%stretch-release *** study showcased new possibilities of incorporating biobased lignin nanospheres in energy storage devices to fabricate stretchable devices leveraging synergies among various two-dimensional nanomaterials.

关键词： Hollow lignin nanospheres MXene Gradient-layered architecture Wrinkled electrodes Stretchable supercapacitors

阻塞性睡眠呼吸暂停综合征患者血栓形成前状态分子与颈动脉内膜中层厚度的关系

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内科急危重症杂志 2015年第4期21卷 279-281页

作者：余坤城谢江霞阳书坤张晓瑜深圳市龙岗区人民医院深圳518172

目的:探讨阻塞性睡眠呼吸暂停低通气综合征(OSAHS)患者血栓形成前状态(PTS)分子标志物与颈动脉内膜中层厚度的关系。方法:选择OSAHS患者56例和健康体检者28例为对照组,采用酶联免疫吸附法测定血清血小板颗粒膜蛋白-140(GMP-140)、血管... 详细信息

目的:探讨阻塞性睡眠呼吸暂停低通气综合征(OSAHS)患者血栓形成前状态(PTS)分子标志物与颈动脉内膜中层厚度的关系。方法:选择OSAHS患者56例和健康体检者28例为对照组,采用酶联免疫吸附法测定血清血小板颗粒膜蛋白-140(GMP-140)、血管性血友病因子(v WF)和抗凝血酶(AT)水平,采用底物发光法测定组织型纤溶酶原激活剂(t-PA)和血浆纤溶酶原激活物抑制剂1(PAI-1)水平;使用彩色多普勒超声检测颈动脉内膜中层厚度(IMT)。结果:OSAHS组血清GMP-140、v WF、Fbg、PAI-1水平高于对照组,血清AT、t-PA水平低于对照组,颈动脉内膜中层厚度高于对照组(P均<0.05)。血清GMP-140、v WF、Fbg、PAI-1水平与IMT呈正相关(r=0.507,0.411,0.392和0.458,均P<0.05)。血清AT、t-PA水平与IMT呈负相关(r=-0.401,-0.367,均P<0.05)。OSAHS患者GMP-140、v WF、t-PA水平与IMT成线性回归关系。结论:OSAHS患者存在着明显的PTS,同时颈动脉内膜增厚明显,PTS是导致患者颈动脉内膜增厚的重要因素之一。

关键词：睡眠呼吸暂停综合征血栓形成前状态颈动脉内膜中层厚度

早期联用乌司他丁及丹参注射液对胸腹部创伤后急性肺损伤的防治作用

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中国中医急症 2010年第7期19卷 1085-1086,1090页

作者：曹平谢江霞余坤城广东省深圳市龙岗区人民医院深圳518172

目的观察早期联用乌司他丁、丹参注射液对胸腹部创伤后急性肺损伤(ALI)的防治作用。方法将60例急性胸腹部创伤患者随机分为治疗组和对照组,每组30例,两组西医常规治疗相同。治疗组加用乌司他丁、丹参注射液静滴。观察两组患者治疗前后... 详细信息

目的观察早期联用乌司他丁、丹参注射液对胸腹部创伤后急性肺损伤(ALI)的防治作用。方法将60例急性胸腹部创伤患者随机分为治疗组和对照组,每组30例,两组西医常规治疗相同。治疗组加用乌司他丁、丹参注射液静滴。观察两组患者治疗前后血气分析指标、住院时间、住ICU时间、急性呼吸窘迫综合征(ARDS)发生率和病死率,并测定血浆肿瘤坏死因子-α(TNF-α)、白细胞介素-6(IL-6)的水平。结果治疗组各项指标明显优于对照组。结论胸腹部创伤后ALI患者早期联合应用乌司他丁及丹参注射液进行干预性治疗,能减少ARDS的发生,降低患者病死率。

关键词：急性肺损伤乌司他丁丹参注射液