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Laparoscopic partial splenectomy in the treatment of splenic ectopic pregnancy

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Hepatobiliary Surgery and Nutrition 2024年第3期13卷 569-572页

作者： ke-xi Liao Li Cao Yan-Zhou Wang Bao-Lin Wang Shu-Guo Zheng Jian-Wei Li Institute of Hepatobiliary Surgery First Affiliated HospitalArmy Medical UniversityChongqingChina Department of Gynecology and Obstetrics First Affiliated HospitalArmy Medical UniversityChongqingChina

Ectopic pregnancy is a pregnancy that occurred outside the uterus,usually in the fallopian tube,followed by other abdominal *** pregnancy could not develop normally to term and requires sufficient evaluation and intervention with medication or surgery in most cases(1).As a rare form of abdominal pregnancy(2),splenic ectopic pregnancy could be treated by drug treatment(3)or surgical interventions,including laparotomy and laparoscopy,which focused on total splenectomy(4,5).A previous study(6)indicated that laparoscopic partial splenectomy for selected patients was safe and *** to the fragile texture of the spleen,the suture method during laparoscopic partial splenectomy was technically demanding since it might encounter higher risk of splenic vascular hemorrhage than total ***,few reports focused on the treatment of splenic ectopic pregnancy via laparoscopic partial splenectomy(7).In order to avoid the potential severe complications such as hemoperitoneum(8)caused by drug treatment alone,and to avert impaired hematopoietic and immune function caused by total splenectomy,we herein presented a case(Video 1)of a 30-year-old woman(gravida 2,para 1)undergoing laparoscopic partial splenectomy performed by hepatobiliary surgeons to treat splenic ectopic pregnancy.

关键词： pregnancy splenectomy impaired

Online Nonstop Task Management for Storm-Based Distributed Stream Processing Engines

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Journal of Computer Science & Technology 2024年第1期39卷 116-138页

作者：张洲金培权谢希科王晓亮刘睿诚万寿红 School of Computer Science and Technology University of Science and Technology of ChinaHefei 230026China key Laboratory of Electromagnetic Space Information Chinese Academy of SciencesHefei 230026China

Most distributed stream processing engines(DSPEs)do not support online task management and cannot adapt to time-varying data ***,some studies have proposed online task deployment algorithms to solve this ***,these approaches do not guarantee the Quality of Service(QoS)when the task deployment changes at runtime,because the task migrations caused by the change of task deployments will impose an exorbitant *** study one of the most popular DSPEs,Apache Storm,and find out that when a task needs to be migrated,Storm has to stop the resource(implemented as a process of Worker in Storm)where the task is *** will lead to the stop and restart of all tasks in the resource,resulting in the poor performance of task *** to solve this problem,in this pa-per,we propose N-Storm(Nonstop Storm),which is a task-resource decoupling DSPE.N-Storm allows tasks allocated to resources to be changed at runtime,which is implemented by a thread-level scheme for task ***,we add a local shared key/value store on each node to make resources aware of the changes in the allocation ***,each resource can manage its tasks at *** on N-Storm,we further propose Online Task Deployment(OTD).Differ-ing from traditional task deployment algorithms that deploy all tasks at once without considering the cost of task migra-tions caused by a task re-deployment,OTD can gradually adjust the current task deployment to an optimized one based on the communication cost and the runtime states of *** demonstrate that OTD can adapt to different kinds of applications including computation-and communication-intensive *** experimental results on a real DSPE cluster show that N-Storm can avoid the system stop and save up to 87%of the performance degradation time,compared with Apache Storm and other state-of-the-art *** addition,OTD can increase the average CPU usage by 51%for computation-intensive application

关键词： distributed stream processing engine(DSPE) Apache Storm online task migration online task deployment

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鸭舵转速对双旋弹追随稳定性影响研究

航空兵器 2024年第2期31卷 71-78页

作者：王刚张润桐林海珍席柯西北工业大学航空学院西安710072 中国兵器工业导航与控制技术研究所北京100089 飞行器基础布局全国重点实验室西安710072

发展了适合双旋弹虚拟飞行仿真的高保真计算流体力学和刚体动力学耦合平台,以此为基础研究了旋转鸭舵对双旋弹弹道追随稳定性的影响。为了准确刻画双旋弹前后体的差动旋转效应,将滑移网格算法引入自研非结构混合网格流场数值模拟程序HUN... 详细信息

发展了适合双旋弹虚拟飞行仿真的高保真计算流体力学和刚体动力学耦合平台,以此为基础研究了旋转鸭舵对双旋弹弹道追随稳定性的影响。为了准确刻画双旋弹前后体的差动旋转效应,将滑移网格算法引入自研非结构混合网格流场数值模拟程序HUND3D。通过对双旋弹进行定轴转动非定常模拟,考察了不同鸭舵转速下双旋弹的流动特征与气动特性。通过耦合求解非定常雷诺平均NS方程和七自由度刚体动力学方程,实现了双旋弹不同弯度弹道的虚拟飞行仿真,分析了弹道追随过程的动力学机理,并结合气动特性分析结果研究了控制鸭舵转速改善弹道追随稳定性的策略。研究结果表明:鸭舵旋转所产生的气动干扰,能够显著影响弹体的侧向力与偏航力矩。通过控制前体鸭舵转速以产生有利于弹道追随的偏航力矩,能够在一定程度上改善弹道追随稳定性。

关键词：双旋弹虚拟飞行仿真计算流体力学滑移网格侧向力偏航力矩追随稳定性

基于EGWO-LSTM-LSM算法的TOF定位研究

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无线电工程 2024年第7期54卷 1767-1778页

作者：柯希孙洁华北理工大学电气工程学院河北唐山063210

针对最小二乘法(Least Squares Method,LSM)对于超宽带(Ultra Wide Band,UWB)中飞行时间(Time of Flight,TOF)法在非视距(Non Line of Sight,NLoS)下定位精度低下的问题,提出了基于扩展灰狼算法(Extended Gray Wolf Algorithm,EGWO)优化后的长短期记忆(Long Short-Term Memory,LSTM)网络改进LSM定位算法(EGWO-LSTM-LSM)。采用LSTM及改进的EGWO建立最优测距误差预测模型,根据预测结果构造权重矩阵,在LSM上加权计算,并添加测距误差校正项,以改进LSM实现静态定位,并结合卡尔曼滤波器(Kalman Filter,KF)实现动态定位追踪。仿真结果表明,EGWO-LSTM预测准确率达98.857%,EGWO-LSTM-LSM将二维和三维位置误差分别稳定控制在10~25 mm,进一步提升了TOF定位精度。

关键词：飞行时间扩展灰狼算法改进最小二乘法长短期记忆卡尔曼滤波

Improving Li Plating Behaviors Through Cu-Sn Alloy-Coated Current Collector for Dendrite-Free Lithium Metal Anodes

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Acta Metallurgica Sinica(English Letters) 2021年第3期34卷 354-358页

作者： Yifeng Cheng xi ke Zhicong Shi Smart Energy Research Centre School of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006China Guangdong Engineering Technology Research Center for New Energy Materials and Devices Guangzhou 510006China

Alloy anode with good reversibility of lithium plating/stripping and long cycling stability is considered as promising anode ***,Cu-Sn alloy is used as the substrate for Li deposition to induce the most densely packed arrangement of Li atoms,thus presenting high lithiophilicity and improving Li plating *** LiFePO4-based full cell with the asprepared dendrite-free Li metal anode retained at 85 mAh g-1 with a high coulombic efficiency of 99.5% after 300 cycles,presenting a capacity retention of 79.4%.This strategy provides a new perspective to structure dendrite-free Li anode for the next-generation high-energy density batteries.

关键词： Li metal anodes Dendrite-free Composite electrode Lithiophilic surface

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单取代β-环糊精衍生物的制备综合实验设计

化学教育（中英文） 2024年第20期45卷 51-59页

作者：刘智敏叶柯希杨怡许志刚昆明理工大学理学院云南昆明650500

为培养学生在制备综合性实验方面的能力,并推行化学教学实验的绿色化和规范化,改进了原有环糊精衍生物制备实验,将反应介质从吡啶变为NaOH水溶液,设计了2种6位单取代-β-环糊精衍生物的制备实验方案。该实验以β-环糊精为原料,对甲苯磺... 详细信息

为培养学生在制备综合性实验方面的能力,并推行化学教学实验的绿色化和规范化,改进了原有环糊精衍生物制备实验,将反应介质从吡啶变为NaOH水溶液,设计了2种6位单取代-β-环糊精衍生物的制备实验方案。该实验以β-环糊精为原料,对甲苯磺酰氯为衍生化试剂制得单-(6-O-对甲苯磺酰)-β-环糊精,后续在此基础上再与乙二胺反应制备得单-(6-乙二胺-6-去氧)-β-环糊精。实验涉及过滤、重结晶等操作,并通过红外光谱、核磁共振氢谱、熔点测定、高效液相色谱对产物进行表征。该综合实验实现了有机化学和分析化学学科知识的融合,能帮助有科研深造需求和从事相关工作的学生奠定良好的实验基础。

关键词： β-环糊精衍生物单取代制备综合实验

Review:Development of Non-Perfluorosulfonic Acid Membranes for High Temperature Proton Exchange Membrane Fuel Cells

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Journal of Harbin Institute of Technology(New Series) 2022年第5期29卷 86-108页

作者： xi ke Wei Feng Dongyue Shanghai R&D Center for Advanced Fluorine&Silicone Materials Shanghai 201108China State key Laboratory of Fluorinated Functional Membrane Materials Zibo 256401ShandongChina

Temperature is a crucial factor that is intrinsically related to fuel cell performances and categorizes the proton exchange membranes(PEM)into high and low temperature(HT,LT)*** water as proton conductor,working temperature of LT-PEM is limited below 100℃.PEM fuel cell with an elevated temperature(HT-PEMFC,>120℃)thus attracts much research attention on account of the significant benefits,such as simpler water management,faster electrode kinetics,improved CO tolerance of platinum catalyst,and heat *** a well-known concept,numerous polymer membranes with doping phosphoric acid(PA)have been investigated for *** this review,the development trend for the most advanced technology of HT-PEM polybenzimidazole(PBI)membrane,other hydrocarbon-based membrane,and fluorinated membrane produced via pre-irradiation induced grafting with respect to their synthesis,properties,critical issues,and corresponding solutions is presented.

关键词： fuel cells PA PBI hydrocarbon pre-irradiation induced grafting

碳排放约束下的城市空间格局优化:理论框架、指标体系与实践路径

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自然资源学报 2024年第3期39卷 682-696页

作者：徐可西詹冰倩姜春鲍海君苏婕妤何旻宇浙大城市学院国土空间规划学院杭州310015 浙江财经大学公共管理学院杭州310018 香港城市大学工程学院中国香港999077

构建低碳城市空间格局是推动城市绿色低碳发展的重要抓手。立足城市碳排放约束目标,构建了集约、紧凑、高效、绿色导向下的城市空间格局优化理论框架,剖析了城市空间格局要素与碳核算体系的内在关系,进而开发了涵盖城市规模、城市形态... 详细信息

构建低碳城市空间格局是推动城市绿色低碳发展的重要抓手。立足城市碳排放约束目标,构建了集约、紧凑、高效、绿色导向下的城市空间格局优化理论框架,剖析了城市空间格局要素与碳核算体系的内在关系,进而开发了涵盖城市规模、城市形态、城市布局和蓝绿空间四个维度的指标体系。城市规模维度旨在控制无序扩张,涉及人口、经济和空间规模三方面指标;城市形态以外部紧凑为导向,涵盖城市平面形态和立面形态两方面指标;城市布局以功能高效为落脚点,涵盖居住密度、职住平衡比等指标;蓝绿空间关注城市碳汇的提升,包括蓝绿空间占比、融合度等指标。遵循“评价指标—规划策略—规划内容—空间响应”逻辑主线,提出了提高城市承载能力、合理控制城市扩张,优化城市空间结构、打造紧凑城市形态,人城产交通一体化、完善城市服务功能和构建市域生态网络、提升固碳增汇能力四条实践路径,为碳排放约束下的城市空间格局优化提供了方向。

关键词：城市空间格局碳排放国土空间规划低碳城市指标体系

Digital and analog memory devices based on 2D layered MPS_(3) (M= Mn, Co, Ni) materials

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Chinese Physics B 2021年第4期30卷 487-491页

作者： Guihua Zhao Li Wang xi ke Zhiyi Yu School of Electronics and Information Technology Sun Yat-sen UniversityGuangzhou 510006China School of Microelectronics Science and Technology Sun Yat-sen UniversityZhuhai 519082China School of Materials and Energy Guangdong University of TechnologyGuangzhou 510006China School of Chemistry and Chemical Engineering Neijiang Normal UniversityNeijiang 641100China

We demonstrate digital and analog devices with an Ag/MPS_(3)/Au structure based on layered MPS_(3)(M=Mn,Co,Ni)2 D *** devices show the bipolar behavior of resistive *** addition,Ag/MnPS_(3)/Au and Ag/NiPS_(3)/Au devices show synaptic characteristics of potentiation and *** digital and analog characteristics of resistance states enable Ag/MPS_(3)/Au devices to work as both binary memory and artificial synapse *** Ag/MPS_(3)/Au memory devices are promising for applications of flexible eye-like and brain-like systems on a chip when they are integrated with photodetectors and FETs composed of full MPS_(3) materials.

关键词： electrochemical metallization memory memristor 2D materials neuromorphic computing