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Nano Research 2024年第3期17卷 1151-1164页

作者： Jane Chung Haibo Yin Rong Wang Yunlong Wang junyang zhang Yue Peng Joung Woo Han Seongyun Ryu Junhua Li State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China EHS Research Center Samsung Electronics Co.Ltd.Gyeonggi-do 18448Republic of Korea

Electrochemical NO-to-NH_(3) under ambient conditions could be a viable alternative having advantages in terms of energy consumption and exhaust gas recycling of NO,replacing a traditional ammonia synthesis method of the Haber–Bosch *** synthesizing boron(B-)and nitrogen(N-)co-doped carbon nanotube(CNT)based gold(Au)catalysts,B-dopants elevate the conductivity of carbon nanotube by sp2 hybridization on graphene and implant B–N domains within the graphene layer,and result in facilitating the embedding amount of Au accompanied by high dispersibility with low particle *** density functional theory(DFT)calculations elucidate that the electron cloud transmitted from B-dopant to the active site of Au induces the Lewis acidic site,and the O-distal pathway occurs following a spontaneous *** of the electron-deficient B-doping area accompanied by N-defects and B–O edges retains the major valence state of Au as Au^(δ+),and suppresses hydrogen evolution reaction(HER)by repulsing the hindrance of H*.This record exhibits the highest faradaic efficiency(FE)of 94.7%,and NH_(3) yield rate of 1877.4μg·h^(-1)·mg_(cat)^(-1),which is the optimal yield over energy consumption in the field of the ambient reduction of aqueous NO.

关键词： boron heteroatom nitrogen defect gold nanoparticles valence states of gold electrochemical NO-to-NH3

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基坑免降水开挖的组合式冻结法支护工艺研究

铁道标准设计 2024年第2期68卷 143-149页

作者：张松岳祖润卢相忠张庆武孙铁成胡田飞亓源水张俊洋石家庄铁道大学省部共建交通工程结构力学行为与系统安全国家重点实验室石家庄050043 唐山开滦建设(集团)有限责任公司河北唐山063000 石家庄铁道大学土木工程学院石家庄050043 苏州轨道交通市域一号线有限公司江苏苏州215000

近年来,随着地下水资源保护力度的不断增大,对基坑工程进行免降水开挖的需求愈加紧迫。为解决富水地层基坑工程施工中的免降水问题,提出一种新的基坑支护方法:传统悬挂式止水帷幕与水平冻土止水帷幕相结合的“组合式冻结法”。根据以往... 详细信息

近年来,随着地下水资源保护力度的不断增大,对基坑工程进行免降水开挖的需求愈加紧迫。为解决富水地层基坑工程施工中的免降水问题,提出一种新的基坑支护方法:传统悬挂式止水帷幕与水平冻土止水帷幕相结合的“组合式冻结法”。根据以往市政工程中的冻结法施工经验,总结组合式冻结法的施工流程,提出泄压孔、温度限位孔和局部冻结技术相结合的冻胀控制措施,以及利用冻结管嵌入地连墙的界面区强化措施。通过模型试验对组合式冻结法的可行性进行验证,试验结果表明,组合式冻结法可以有效实现基底的支护,在冻结薄弱环节临时竖井、地连墙附近冻结壁承载能力满足设计要求;观测发现地层冻结对地连墙强度和变形无明显影响。

关键词：组合式冻结法基坑工程免降水开挖模型试验冻土止水帷幕

西部矿区多煤层采动地表沉陷无人机观测方法研究

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煤矿安全 2024年第6期55卷 228-235页

作者：崔建廷王昆刘国建张俊阳杨地赵同彬李俊生鄂尔多斯市昊华精煤有限责任公司内蒙古鄂尔多斯017000 山东科技大学能源与矿业工程学院山东青岛266590

西部矿区煤矿开采具有浅埋深、薄基岩、多煤层开采、地表环境脆弱等特点,为化解开采地表沉陷传统观测方法覆盖范围小、作业强度高、自动化程度低等难题,引入无人机(Unmanned Aerial Vehicle, UAV)摄影测量技术观测并分析某煤矿工作面地... 详细信息

西部矿区煤矿开采具有浅埋深、薄基岩、多煤层开采、地表环境脆弱等特点,为化解开采地表沉陷传统观测方法覆盖范围小、作业强度高、自动化程度低等难题,引入无人机(Unmanned Aerial Vehicle, UAV)摄影测量技术观测并分析某煤矿工作面地表沉陷规律。结果表明:UAV摄影测量观测开采沉陷的中误差为4.4 cm,满足地表沉陷整体观测需求;获取的2.53 km^(2)测区范围内地表整体沉陷模型可准确反映矿区地表沉陷区域及沉陷幅度;受多煤层开采影响地表沉陷模型呈不均匀盆状,沿工作面走向、倾向沉陷曲线均呈现不对称现象,最大沉陷值3.18 m。

关键词：无人机观测摄影测量地表沉陷多煤层开采西部矿区

农文旅融合视角下的贾汪区乡村产业发展路径研究

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市场周刊 2024年第4期37卷 38-41页

作者：张俊洋江苏师范大学江苏徐州221116

农文旅融合发展是乡村产业发展的新方向。徐州市贾汪区具有农文旅融合发展的必要性和可行性,但当前在发展定位、专项规划、政策扶持和经营管理等方面存在诸多问题。未来,贾汪农文旅融合开发应首先明确发展定位,围绕打造徐州城郊乡村休... 详细信息

农文旅融合发展是乡村产业发展的新方向。徐州市贾汪区具有农文旅融合发展的必要性和可行性,但当前在发展定位、专项规划、政策扶持和经营管理等方面存在诸多问题。未来,贾汪农文旅融合开发应首先明确发展定位,围绕打造徐州城郊乡村休闲度假体验示范区的目标,从政策帮扶、产品设计、营销推广等多种路径助推深度融合和全面进步。

关键词：农文旅产业融合乡村旅游贾汪区

Oil-in-water nanoemulsions loaded with lycopene extracts encapsulated by spray drying:Formulation,characterization and optimization

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Chinese Journal of Chemical Engineering 2024年第6期70卷 73-81页

作者： junyang Li Roberta Campardelli Giuseppe Firpo Jingtao zhang Patrizia Perego Department of Civil Chemical and Environmental Engineering(DICCA)University of GenoaVia Opera Pia 15Genova 16145Italy Department of Physics University of GenoaVia Dodecaneso 32Genova 16146Italy School of Food and Bioengineering Zhengzhou University of Light IndustryZhengzhou 450002China

Lycopene is very susceptible to degradation once released from the protective chromoplast *** this study,oil-in-water(O/W)nanoemulsions coupled with spray drying technology were applied for the encapsulation and stabilization of lycopene extracted from tomato *** extract was obtained by ultrasound-assisted *** were prepared by a high-speed rotor stator using isopropyl myristate as the oil phase and Pluronic F-127 as the emulsifier for the aqueous external *** effect of emulsification process parameters was *** drying of the produced emulsions was attempted to obtain a stabilized dry powder after the addition of a coating *** effect of different coating agents(maltodextrin,inulin,gum arabic,pectin,whey and polyvinylpyrrolidone),drying temperature(120-170℃),and feed flow rate(3-9 ml·min^(-1))on the obtained particles was *** revealed that the emulsion formulation of 20/80(O/W)with 1.5%(mass fraction)of Pluronic F-127 as stabilizer in the aqueous phase resulted in a stable nanoemulsion with droplet sizes in the range of 259-276 nm with a unimodal and sharp size *** extract in the nanoemulsion was well protected at room temperature with a degradation rate of lycopene of about 50%during a month of storage *** most stable emulsions were then processed by spray drying to obtain a dry *** drying was particularly successful when using maltodextrin as a coating agent,obtaining dried spherical particles with mean diameters ofμm with a smooth *** possibility of dissolving the spray dried powder in order to *** original emulsion was also successfully verified.

关键词： Emulsions Powders Stability Isopropyl myristate Lycopene Spray-drying

不锈钢在盐酸介质中的耐腐蚀性能研究现状及展望

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焊管 2024年第4期47卷 1-9,24页

作者：梁东光张君阳陈芳芳田文明程法嵩北华航天工业学院材料工程学院河北廊坊065000 中国航发贵州黎阳航空动力有限公司工程技术部贵阳550014

不锈钢作为用量最大的耐蚀合金,广泛应用于石油石化、医药等富含盐酸的环境中,但随着服役环境日益苛刻,不锈钢仍会发生腐蚀,如何有效防止腐蚀失效,成为了金属材料腐蚀防护领域研究的重点。介绍了不锈钢在盐酸介质中的腐蚀研究方法,重点... 详细信息

不锈钢作为用量最大的耐蚀合金,广泛应用于石油石化、医药等富含盐酸的环境中,但随着服役环境日益苛刻,不锈钢仍会发生腐蚀,如何有效防止腐蚀失效,成为了金属材料腐蚀防护领域研究的重点。介绍了不锈钢在盐酸介质中的腐蚀研究方法,重点分析了不锈钢耐盐酸腐蚀的机理、钝化膜的溶解破坏行为和影响因素,指出了耐盐酸腐蚀不锈钢的选材原则和发展方向,为不锈钢在盐酸腐蚀环境中的应用和选材提供参考。

关键词：不锈钢盐酸腐蚀钝化膜电化学

基于电催化还原硝酸盐合成氨的综合实验——铜基催化剂制备表征、性能探究及应用设计

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大学化学 2024年第6期39卷 373-382页

作者：邹嘉沛张君阳伍旭明魏聪方思敏王钰熙中国科学技术大学化学与材料科学学院合肥230026 化学国家实验教学示范中心(中国科学技术大学) 合肥230036 中山大学柔性电子学院广东深圳518107

电催化作为纳米材料和能源化学领域的研究热点,是未来新能源存储与转化技术的关键所在。在“碳达峰,碳中和”背景下,电催化还原硝酸盐合成氨技术被认为是绿色、安全的技术,为了填补这一前沿科研成果在实验教学中的空白,我们开发了基于... 详细信息

电催化作为纳米材料和能源化学领域的研究热点,是未来新能源存储与转化技术的关键所在。在“碳达峰,碳中和”背景下,电催化还原硝酸盐合成氨技术被认为是绿色、安全的技术,为了填补这一前沿科研成果在实验教学中的空白,我们开发了基于电催化还原硝酸盐合成氨的综合化学实验。本实验具有基础知识-科学研究-实际应用的一体化设计,包含铜基催化剂制备表征、性能探究及应用设计的层次化内容,有助于学生了解电催化的研究进展,掌握电催化的基础知识与研究方法,培养学生的创新意识与学以致用的能力。

关键词：电催化还原铜基催化剂合成氨科教融合

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Genome wide association analysis identifies candidate genes for fruit quality and yield in Actinidia eriantha

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Journal of Integrative Agriculture 2024年第6期23卷 1929-1939页

作者： Yingzhen Wang Ying Wu Xinlei Wang Wangmei Ren Qinyao Chen Sijia zhang Feng zhang Yunzhi Lin junyang Yue Yongsheng Liu School of Horticulture Anhui Agricultural UniversityHefei 230036China School of Forestry Science and Technology Lishui Vocational and Technical CollegeLishui 323000China College of Life Science Sichuan UniversityChengdu 610064China

Quality and yield are the primary concerns in kiwifruit breeding,but research on the genetic mechanisms of fruit size,shape,and ascorbic acid(ASA)content is currently very limited,which restricts the development of kiwifruit molecular *** this study,we obtained a total of 8.88 million highly reliable single nucleotide polymorphism(SNP)markers from 140 individuals from the natural hybrid offspring of Actinidia eriantha cv.‘White’using whole genome resequencing technology.A genome-wide association study was conducted on eight key agronomic traits,including single fruit weight,fruit shape,ASA content,and the number of inflorescences per branch.A total of 59 genetic loci containing potential functional genes were located,and candidate genes related to single fruit weight,fruit length,ASA content,number of inflorescences per branch and other traits were identified within the candidate interval,such as AeWUSCHEL,AeCDK1(cell cycle dependent kinase),AeAO1(ascorbic oxidase)and AeCO1(CONSTANS-like 4).After constructing an RNAi vector for AeAO1 and injecting it into the fruit of cv.‘Midao 31’to interfere with the expression of the AeAO1 gene,the results showed that the activity of ascorbic oxidase in the fruit of‘Midao 31’significantly decreased,while the content of ASA significantly *** study provides valuable insights into the genetic basis of variation in *** fruit traits,which may benefit molecular marker-assisted breeding efforts.

关键词： Actinidia eriantha GWAS SNP QTLs fruit quality

Wearable multichannel-active pressurized pulse sensing platform Yunlong

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Microsystems & Nanoengineering 2024年第3期10卷 283-292页

作者： Zhao Qingxia Sun Shixuan Mei Libo Gao Xikuan zhang Zekun Yang Xueli Nan Haiyan zhang Chenyang Xue junyang Li Pen-Tung Sah Institute of Micro-Nano Science and Technology Xiamen University361102 XiamenChina Discipline of Intelligent Instrument and Equipment Xiamen University361102 XiamenChina Department of Electronic Engineering Ocean University of China266000 QingdaoChina School of Automation and Software Engineering Shanxi University030006 TaiyuanChina Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) 361005 XiamenChina Key Laboratory of Instrumentation Science and Dynamic Measurement Ministry of Education North University of China030051 TaiyuanChina Science and Technology on Vacuum Technology and Physics Laboratory Lanzhou Institute of PhysicsChinese Academy of Space Technology730000 LanzhouChina

With the modernization of traditional Chinese medicine(TCM),creating devices to digitalize aspects of pulse diagnosis has proved to be *** currently available pulse detection devices usually rely on external pressure devices,which are either bulky or poorly integrated,hindering their practical *** this work,we propose an innovative wearable active pressure three-channel pulse monitoring device based on TCM pulse diagnosis *** combines a flexible pressure sensor array,flexible airbag array,active pressure control unit,advanced machine learning approach,and a companion mobile application for human–computer *** to the high sensitivity(460.1 kPa^(−1)),high linearity(R^(2)>0.999)and flexibility of the flexible pressure sensors,the device can accurately simulate finger pressure to collect pulse waves(Cun,Guan,and Chi)at different external pressures on the *** addition,by measuring the change in pulse wave amplitude at different pressures,an individual’s blood pressure status can be successfully *** enables truly wearable,actively pressurized,continuous wireless dynamic monitoring of wrist pulse *** innovative and integrated design of this pulse monitoring platform could provide a new paradigm for digitizing aspects of TCM and other smart healthcare systems.

关键词： pulse diagnosis enable

A Novel Anti-Collision Algorithm for Large Scale of UHF RFID Tags Access Systems

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Computers, Materials & Continua 2024年第7期80卷 897-912页

作者： Xu zhang Yi He Haiwen Yi Yulu zhang Yuan Li Shuai Ma Gui Li Zhiyuan Zhao Yue Liu junyang Liu Guangjun Wen Jian Li School of Information and Communication Engineering/Yibin Institute University of Electronic Science and Technology of ChinaChengdu611731China Department of IoT Technology Research China Mobile Research InstituteBeijing100053China The 10th Research Institute of China Electronics Technology Group Corporation Chengdu611731China College of Information and Communication National University of Defense TechnologyWuhan430019China

When the radio frequency identification(RFID)system inventories multiple tags,the recognition rate will be seriously affected due to *** on the existing dynamic frame slotted Aloha(DFSA)algorithm,a sub-frame observation and cyclic redundancy check(CRC)grouping combined dynamic framed slotted Aloha(SUBF-CGDFSA)algorithm is *** algorithm combines the precise estimation method of the quantity of large-scale tags,the large-scale tags grouping mechanism based on CRC pseudo-randomcharacteristics,and the Aloha anti-collision optimization mechanism based on sub-frame *** grouping tags and sequentially identifying themwithin subframes,it accurately estimates the number of remaining tags and optimizes frame length accordingly to improve efficiency in large-scale RFID *** outcomes demonstrate that this proposed algorithmcan effectively break through the system throughput bottleneck of 36.8%,which is up to 30%higher than the existing DFSA standard scheme,and has more significant advantages,which is suitable for application in largescale RFID tags scenarios.

关键词： Radio frequency identification anti-collision tags grouping dynamic framed slotted Aloha