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广西贵港市主要大气污染物特征及与气象因子的关系研究

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环境科学与管理 2024年第9期49卷 42-46页

作者：梁莹露蒙小寒莫申萍刘怡明许艺馨贵港市气象局广西贵港537100 广西物流职业技术学院广西贵港537100

利用贵港市2018年-2022年大气污染物日浓度、空气质量指数(AQI)数据和同期逐日气象资料,采用时间序列分析方法和统计学方法分析贵港市主要污染物的时间变化特征及其与气象条件的关系。结果表明:2018年-2022年贵港市污染天数先减后增,1月... 详细信息

利用贵港市2018年-2022年大气污染物日浓度、空气质量指数(AQI)数据和同期逐日气象资料,采用时间序列分析方法和统计学方法分析贵港市主要污染物的时间变化特征及其与气象条件的关系。结果表明:2018年-2022年贵港市污染天数先减后增,1月、9月、10月累计污染天数最多,主要污染物为细颗粒物(PM_(2.5))和臭氧(O_(3));研究时段内下半年逐日O_(3)浓度和全年逐日PM_(2.5)浓度呈显著的二次抛物线变化趋势,O_(3)浓度在9月越高,1月、2月最低,PM_(2.5)浓度在1、12月最高,6-8月最低;O_(3)与温度因子、日照时数正相关,与相对湿度、降水量负相关,PM_(2.5)主要与气象因子呈负相关。

关键词：贵港市 O_(3) PM_(2.5) 变化特征气象因子

Improved cyclic stability of LiNi_(0.8)Mn_(0.1)Co_(0.1)O_(2) cathode enabled by a novel CEI forming additive

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Frontiers in Energy 2024年第4期18卷 535-544页

作者： Zulipiya SHADIKE yiming CHEN Lin liu Xinyin CAI Shuiyun SHEN Junliang ZHANG Institute of Fuel Cells School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China

The undesired side reactions at electrode/electrolyte interface as well as the irreversible phase evolution during electrochemical cycling significantly affect the cyclic performances of nickel-rich NMCs electrode *** optimization is an effective approach to suppress such an adverse side reaction,thereby enhancing the electrochemical ***,a novel boron-based film forming additive,tris(2,2,2-trifluoroethyl)borate(TTFEB),has been introduced to regulate the interphasial chemistry of LiNi0.8Mn0.1Co0.1O2(NMC811)cathode to improve its long-term cyclability and rate *** results of multi-model diagnostic study reveal that formation lithium fluoride(LiF)-rich and boron(B)containing cathode electrolyte interphase(CEI)not only stabilizes cathode surface,but also prevents electrolyte ***,homogenously distributed B containing species serves as a skeleton to form more uniform and denser CEI,reducing the interphasial ***,the Li/NMC811 cell with the TTFEB additive delivers an exceptional cycling stability with a high-capacity retention of 72.8%after 350 electrochemical cycles at a 1 C current rate,which is significantly higher than that of the cell cycled in the conventional electrolyte(59.7%).These findings provide a feasible pathway for improving the electrochemical performance of Ni-rich NMCs cathode by regulating the interphasial chemistry.

关键词： NMC811 cathode electrolyte interphase film forming additives cyclic stability

Evolution Toward Artificial Intelligence of Things Under 6G Ubiquitous⁃X

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Journal of Harbin Institute of Technology(New Series) 2020年第3期27卷 116-135页

作者： Ping Zhang Xiaodong Xu Xiaoqi Qin yiming liu Nan Ma Shujun Han State Key Laboratory of Networking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing 100876China National Engineering Laboratory for Mobile Network Technologies Beijing University of Posts and TelecommunicationsBeijing 100876China

With the evolution of cellular networks,6G is a promising technology to provide ubiquity of communications,computing,control,and consciousness(UC4)for“human⁃machine⁃thing⁃genie”and build a ubiquitous intelligent mobile ***,which can act as the artificial intelligence assistance for 6G users,is the key enabler to realize the unprecedented transformation from mobile Internet to network of *** Internet of Things(IoT)is the digital nervous system,genie acts like the brain of the overall *** by 6G,IoT will step into the Artificial Intelligence of Things(AIoT)era and the AIoT networks have the abilities of intelligent perception,intelligent analysis,and intelligent *** this paper,the concept of Ubiquitous⁃X is introduced,which is considered as the fundamental architecture of 6G network,and the definition and architecture of AIoT under Ubiquitous⁃X is also *** major technical challenges posed by the service requirements of novel AIoT applications are pinpointed,including massive and intelligent connectivity,efficient computing,security,privacy,authentication,high scalability and *** enabling technologies to support seamless service experiences across terminals to realize AIoT are introduced as well.

关键词： AIoT 6G Ubiquitous⁃X AI MEC blockchain physical layer security

Transjugular intrahepatic portosystemic shunt for repeated bleeding of hemorrhoids caused by severe portal hypertension with ectopic varices: A case report

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Journal of Interventional Medicine 2020年第3期3卷 157-160页

作者： Qin Shi Chen Zhou Jiacheng liu Kun Qian yiming liu Songlin Song Bin Xiong Department of Radiology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430022China Hubei Province Key Laboratory of Molecular Imaging Wuhan430022China

Background:Severe portal hypertension is life-threatening and can bring adverse complications such as ascites,gastroesophageal varices,and *** can,even cause variceal hemorrhage,which may lead to a high risk of *** is a rare incidence in bleeding of hemorrhoids caused by severe ectopic *** presentation:We report the case of a female patient with a 20-year history of hepatitis B virus infection who presented with repeated bleeding of hemorrhoids caused by severe portal hypertension with ectopic varices that is connection between the superior mesenteric vein and rectal venous *** results revealed a hemoglobin level of 74 g/***,the patient was successfully treated with transjugular intrahepatic portosystemic shunt(TIPSS)placement without variceal embolization after a multidisciplinary comprehensive *** the two-month follow-up period,the patient had failed to develop hepatic encephalopathy or hematochezia,and computed tomography venography(CTV)indicated that the stent was unobstructed and ascites ***:TIPSS placement is effective for the case,and we hope this case can help improve clinicians’awareness of hemorrhoidal bleeding with severe portal *** hypertension should also be considered during the diagnosis and treatment,as opposed to hemorrhoidal bleeding ***,abdominal CTV is recommended as an effective imaging examination method to determine the stent status after operation.

关键词： Hemorrhoidal bleeding Ectopic varices Portal hypertension Transjugular intrahepatic portosystemic shunt

职业院校健康评估课程混合式学习模式的实践研究

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河南医学研究 2024年第16期33卷 3019-3023页

作者：朱迪张建刘玙平赵慧楠于佳卉王翠丽刘奕铭河南卫生健康干部学院医学部河南郑州450008 河南卫生健康干部学院培训部河南郑州450008 南阳农业职业学院心理健康教育中心河南南阳473000

目的探索职业院校护理专业学生混合式学习和自主学习能力的现状,深度挖掘其影响因素,进而改进健康评估课程的教学设计,并用于混合式学习模式的创新和教学实践。方法通过问卷调查分析研究对象的基本特征、混合式学习现状及自主学习能力,... 详细信息

目的探索职业院校护理专业学生混合式学习和自主学习能力的现状,深度挖掘其影响因素,进而改进健康评估课程的教学设计,并用于混合式学习模式的创新和教学实践。方法通过问卷调查分析研究对象的基本特征、混合式学习现状及自主学习能力,授课结束后评估课程满意度。结果护理专业学生自主学习能力测评得分总分(103.33±16.44)分,护生的在线学习经验和理论成绩对自主学习能力有影响(P<0.05),课程结束后学生普遍满意度高。结论学生愿意在健康评估课程中使用混合式学习模式且接受度高,但受限于在线学习经验等因素的影响,造成一些学生自主学习能力较弱,教学实践中教师可通过改进教学设计提高学生自主学习能力,让学生善于筛选并充分使用线上学习资源。

关键词：职业院校健康评估课程混合式学习实践研究

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全钢附着式升降脚手架深化设计施工技术

建筑机械化 2024年第5期45卷 53-57页

作者：吴旭朱凯健陈伟杜一波刘益铭中国建筑第二工程局有限公司华东分公司上海200135

以某大型住宅建设项目为例,对建筑单体的阳台、山墙、飘窗、连廊等节点部位附着式升降脚手架导座进行深化设计,从而降低了施工现场难度,也保证附着式升降脚手架施工安全,给项目施工创造良好的安全环境,保证项目节点工期。

关键词：附着式升降脚手架高层住宅受力分析深化设计

Anisotropic shearing mechanism of Kangding slate:Experimental investigation and numerical analysis

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第5期16卷 1487-1504页

作者： Ping liu Quansheng liu Penghai Deng Yucong Pan yiming Lei Chenglei Du Xianqi Xie The Key Laboratory of Geotechnical and Structural Engineering Safety of Hubei Province School of Civil EngineeringWuhan UniversityWuhan430072China State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan UniversityWuhan430072China

The shear mechanical behavior is regarded as an essential factor affecting the stability of the surrounding rocks in underground *** shear strength and failure mechanisms of layered rock are significantly affected by the foliation *** shear tests were conducted on cubic slate samples with foliation angles of 0°,30°,45°,60°,and 90°.The effect of foliation angles on failure patterns,acoustic emission(AE)characteristics,and shear strength parameters was *** on AE characteristics,the slate failure process could be divided into four stages:quiet period,step-like increasing period,dramatic increasing period,and remission period.A new empirical expression of cohesion for layered rock was proposed,which was compared with linear and sinusoidal cohesion expressions based on the results made by this paper and previous *** comparative analysis demonstrated that the new expression has better prediction ability than other *** proposed empirical equation was used for direct shear simulations with the combined finite-discrete element method(FDEM),and it was found to align well with the experimental *** both computational efficiency and accuracy,it was recommended to use a shear rate of 0.01 m/s for FDEM to carry out direct shear *** balance the relationship between the number of elements and the simulation results in the direct shear simulations,the recommended element size is 1 mm.

关键词： Anisotropy Empirical expression of cohesion foliation angles Combined finite-discrete element method(FDEM) Shear rate Element size

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白骨壤人工纯林改造和多样性提升技术

林业科技通讯 2024年第2期 89-92页

作者：吴晓东陈菁菁刘一鸣王蔚姜仲茂廖宝文广东湛江红树林国家级自然保护区管理局广东湛江524088 中国林业科学研究院热带林业研究所广州510520

针对广东省沿海前沿滩涂营造的大面积低矮稀疏的单一乡土红树白骨壤(Avicennia marina)纯林,在湛江雷州附城镇选择低、中2个潮位的白骨壤人工林样地,采用条带方式或随机混合方式套种4种乡土红树植物,以期提升林分密度和树种多样性。结... 详细信息

针对广东省沿海前沿滩涂营造的大面积低矮稀疏的单一乡土红树白骨壤(Avicennia marina)纯林,在湛江雷州附城镇选择低、中2个潮位的白骨壤人工林样地,采用条带方式或随机混合方式套种4种乡土红树植物,以期提升林分密度和树种多样性。结果显示,套种2年后,2种套种方式在中潮带都显著提高红树植物密度,在低潮带都显著提高植被盖度。2种套种方式在套种完成时即可显著提升树种多样性达对照的3倍,但在2年后由于样地内大量白骨壤幼树自然定居,套种对树种多样性的提升效果降低为对照的2倍左右。套种乡土树种对土壤理化性质的影响不显著。结果表明,在高程落差较小的滩涂,条带状种植和混合种植多种乡土红树植物都可显著提高白骨壤纯林的林分密度、结构复杂性和多样性,但是提升效果是否具有可持续性需要更长期的观测。

关键词：红树林白骨壤 Avicennia marina 人工红树林林分改造多样性功能提升

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Improved light coupling efficiency of organic lightemitting diode and polymer optical waveguide integrated device by grating coupler

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Optoelectronics Letters 2021年第10期17卷 598-603页

作者： WEI Song liu Chang QIN Houyun liu yiming CHEN Changming WANG Hongbo ZHAO Yi State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012China

In this work,the light coupling efficiency of organic light-emitting diode(OLED)and polymer optical waveguide integrated device was improved by the grating *** maximize light coupling efficiency,the grating coupler was optimized by finite-difference time-domain(FDTD)*** on the simulation results,the grating coupler was fabricated via laser interference lithography process and an OLED was integrated on the surface of *** the integrated devices without and with grating coupler,light coupling efficiency of the grating-based integrated device was improved by about 5%.The proposed integrated device has the potential application for low-cost and flexible monolithic optical sensors.

关键词： waveguide diode optical