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On the chronological understanding of the homogeneous dielectric barrier discharge

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High Voltage 2023年第6期8卷 1132-1150页

作者： Xinpei Lu Zhi Fang Dong Dai Tao Shao Feng liu Cheng Zhang dawei liu Lanlan Nie Chunqi Jiang State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhanChina College of Electrical Engineering and Control Science Nanjing Tech TechnologyNanjingChina School of Electric Power South China University of TechnologyGuangzhouChina Institute of Electrical Engineering Chinese Academy of SciencesBeijingChina Frank Reidy Research Center for Bioelectrics Old Dominion UniversityNorfolkVirginiaUSA Department of Electrical and Computer Engineering Old Dominion UniversityNorfolkVirginiaUSA

Dielectric barrier discharges(DBD)are widely utilised non‐equilibrium atmospheric pressure plasmas with a diverse range of applications,such as material processing,surface treatment,light sources,pollution control,and *** the course of several decades,extensive research has been dedicated to the generation of homogeneous DBD(H‐DBD),focussing on understanding the transition from H‐DBD to filamentary DBD and exploring strategies to create and sustain H‐*** paper first discusses the in-fluence of various parameters on DBD,including gas flow,dielectric material,surface conductivity,and mesh ***,a chronological literature review is presented,highlighting the development of H‐DBD and the associated understanding of its un-derlying *** encompasses the generation of H‐DBD in helium,nitrogen,and ***,the paper provides a brief overview of multiple‐current‐pulse(MCP)behaviours in H‐*** objective of this article is to provide a chronological un-derstanding of homogeneous dielectric barrier discharge(DBD).This understanding will aid in the design of new experiments aimed at better comprehending the mechanisms behind H‐DBD generation and ultimately assist in achieving large‐volume H‐DBD in an air environment.

关键词： dielectric barrier pollution

New insights into the associations among feed efficiency, metabolizable efficiency traits and related QTL regions in broiler chickens

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Journal of Animal Science and Biotechnology 2020年第4期11卷 950-964页

作者： Wei Li Ranran liu Maiqing Zheng Furong Feng dawei liu Yuming Guo Guiping Zhao Jie Wen State Key Laboratory of Animal Nutrition Key Laboratory of Animal(Poultry)Genetics Breeding and ReproductionMinistry of AgricultureInstitute of Animal SciencesChinese Academy of Agricultural SciencesBeijing 100193China College of Animal Science and Technology China Agricultural UniversityBeijing 100193China Foshan Gaoming Xinguang Agricultural and animal Industrials Corporation Foshan 528515China.

Background: Improving the feed efficiency would increase profitability for producers while also reducing the environmental footprint of livestock production. This study was conducted to investigate the relationships among feed efficiency traits and metabolizable efficiency traits in 180 male broilers. Significant loci and genes affecting the metabolizable efficiency traits were explored with an imputation-based genome-wide association study. The traits measured or calculated comprised three growth traits, five feed efficiency related traits, and nine metabolizable efficiency ***: The residual feed intake(RFI) showed moderate to high and positive phenotypic correlations with eight other traits measured, including average daily feed intake(ADFI), dry excreta weight(DEW), gross energy excretion(GEE), crude protein excretion(CPE), metabolizable dry matter(MDM), nitrogen corrected apparent metabolizable energy(AMEn), abdominal fat weight(Ab F), and percentage of abdominal fat(Ab P). Greater correlations were observed between growth traits and the feed conversion ratio(FCR) than RFI. In addition, the RFI, FCR, ADFI, DEW,GEE, CPE, MDM, AMEn, Ab F, and Ab P were lower in low-RFI birds than high-RFI birds(P < 0.01 or P < 0.05), whereas the coefficients of MDM and MCP of low-RFI birds were greater than those of high-RFI birds(P < 0.01). Five narrow QTLs for metabolizable efficiency traits were detected, including one 82.46-kb region for DEW and GEE on Gallus gallus chromosome(GGA) 26, one 120.13-kb region for MDM and AMEn on GGA1, one 691.25-kb region for the coefficients of MDM and AMEn on GGA5, one region for the coefficients of MDM and MCP on GGA2(103.45–103.53 Mb), and one 690.50-kb region for the coefficient of MCP on GGA14. Linkage disequilibrium(LD) analysis indicated that the five regions contained high LD blocks, as well as the genes chromosome 26 C6 orf106 homolog(C26 H6 orf106), LOC396098, SH3 and multiple ankyrin repeat domains 2(SHANK2), ETS homologous

关键词： Broiler Feed efficiency Genome-wide association study Imputation Metabolizable efficiency

Resuscitation of Septic Patients with Target-and-endpoint Protocol:A Retrospective Study from a Chinese Tertiary Hospital ICU

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Chinese Medical Sciences Journal 2018年第3期33卷 135-142页

作者： Hongmin Zhang Xiaoting Wang Qing Zhang dawei liu Department of Critical Care Medicine Peking Union Medical College HospitalChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100730China

Objective To investigate the effect of target-and-endpoint protocol on the resuscitation of septic *** This is a retrospective study performed at the Peking Union Medical College Hospital Intensive Care *** enrolled 545 septic patients who needed vasopressors on at least the first day of ICU *** general characteristics,blood lactate level,mean arterial pressure(MAP),central venous pressure(CVP)and saturation of central venous oxygen(ScvO2)at admission and 6,24 hours after admission were *** parameters at different time points were *** clearance rate and in-hospital mortality were *** The 6-hour lactate clearance rate was 21.6%(IQR,8.6%-39.0%),and in-hospital mortality was 9.4%.For patients with low CVP values(<8 mm Hg,1 mm Hg=0.133 kPa)at admission,CVP increased significantly at 6 hours after admission(5.4±1.6 mm Hg vs.7.7±2.6 mm Hg,P<0.001).For patients with low MAP(<75 mm Hg)at admission,the MAP values increased significantly at 6 hours(64.2±7.1 mm Hg vs.82.2±13.1 mm Hg,P<0.001).For patients with low ScvO2 value(<70%)at admission,the ScvO2 value increased significantly at 6 hours(61.9%±7.0%vs.71.9%±7.8%,P<0.001).No difference was found between the values at 6 hours and the corresponding values at 24 hours after *** patients with high CVP values(≥8 mm Hg)at admission,CVP decreased significantly at 6 hours(11.3±4.0 mm Hg vs.10.3±2.9 mm Hg,P<0.001).For patients with high MAP(≥75 mm Hg)at admission,the MAP values decreased significantly at 6 hours(94.2±13.9 mm Hg vs.89.4±11.4 mm Hg,P<0.001).For patients with high ScvO2 value(≥70%)at admission,the ScvO2 values decreased significantly at 6 hours(76.8%±4.2%vs.72.9%±7.3%,P<0.001).No difference was found between the values at 6 hours and the corresponding values at 24 *** This study suggested that in the resuscitation of sepsis and septic shock patients in the ICU,the target values did not need to be within the“normal range”recommended b

关键词： sepsis septic shock lactate central venous pressure

Resuscitation fluids as drugs:targeting the endothelial glycocalyx

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Chinese Medical Journal 2022年第2期135卷 137-144页

作者： Guangjian Wang Hongmin Zhang dawei liu Xiaoting Wang Chinese Critical Ultrasound Study Group Department of Critical Care Medicine Peking Union Medical College HospitalPeking Union Medical College&Chinese Academy of Medical SciencesBeijing 100730China

Fluid resuscitation is an essential intervention in critically ill patients,and its ultimate goal is to restore tissue *** illnesses are often accompanied by glycocalyx degradation caused by inflammatory reactions,hypoperfusion,shock,and so forth,leading to disturbed microcirculatory perfusion and organ ***,maintaining or even restoring the glycocalyx integrity may be of high priority in the therapeutic *** drugs,however,different resuscitation fluids may have beneficial or harmful effects on the integrity of the *** purpose of this article is to review the effects of different resuscitation fluids on the *** animal studies have shown that normal saline might be associated with glycocalyx degradation,but clinical studies have not confirmed this *** starch(HES),rather than other synthetic colloids,may restore the ***,the use of HES also leads to serious adverse events such as acute kidney injury and bleeding *** studies have suggested that albumin may restore the glycocalyx,whereas others have suggested that balanced crystalloids might aggravate glycocalyx ***,most studies did not correct the effects of the infusion rate or fluid volume;therefore,the results of using balanced crystalloids remain ***,mainly animal studies have suggested that plasma may protect and restore glycocalyx integrity,and this still requires confirmation by high-quality clinical studies.

关键词： Fluid resuscitation Resuscitation fluid Fluid therapy Endothelial glycocalyx Glycocalyx

LungPoint导航联合吲哚菁绿荧光成像在Ⅰa期非小细胞肺癌淋巴结采样中的应用价值

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结核与肺部疾病杂志 2024年第2期5卷 101-105页

作者：朱建坤刘大伟李晓峰孟倩山东大学附属山东省公共卫生临床中心胸外科济南250100 山东省医学科学院附属医院儿科济南250031

目的:寻找一种准确定位Ⅰa期非小细胞肺癌患者(NSCLC)前哨淋巴结(SLN)的方法,验证SLN作为淋巴结取样样本的合理性。方法:采用前瞻性研究方法,参照入组标准纳入2021年1月至2023年12月在山东省公共卫生临床中心胸外科临床分期为Ⅰa期NSCL... 详细信息

目的:寻找一种准确定位Ⅰa期非小细胞肺癌患者(NSCLC)前哨淋巴结(SLN)的方法,验证SLN作为淋巴结取样样本的合理性。方法:采用前瞻性研究方法,参照入组标准纳入2021年1月至2023年12月在山东省公共卫生临床中心胸外科临床分期为Ⅰa期NSCLC住院患者50例,术前借助LungPoint导航气管镜下肿瘤周围注射示踪剂吲哚菁绿,通过荧光胸腔镜成像完成SLN定位,并对包括SLN在内的区域淋巴结行病理学检查,使用该方法对SLN的识别率、准确率与假阴性率等验证其作为淋巴结取样样本的合理性。结果:50例患者中,41例检测到SLN,识别率为82.0%(41/50),经病理检测发现3例共计9枚SLN有淋巴结转移(阳性),其中1例亦检出非前哨淋巴结(N-SLN)阳性2枚。9例患者未检测到SLN,清扫淋巴结54枚,未发现转移淋巴结,故SLN准确率为100.0%(41/41),假阴性率为0(0/3)。结论:借助LungPoint气管镜在肿瘤周围注射示踪剂吲哚菁绿,通过荧光胸腔镜成像探寻SLN技术具有较高的区域淋巴结转移预测性,有望成为指导Ⅰa期NSCLC系统性淋巴结采样的依据。

关键词：癌,非小细胞肺前哨淋巴结活组织检查吲哚花青绿显微镜检查,荧光

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马铃薯切块薯种取种勺设计与仿真优化

沈阳农业大学学报 2024年第2期55卷 207-215页

作者：邬备李卓向青苗钱怀源谢方平刘大为王修善湖南农业大学机电工程学院长沙410128 湖南农业大学智能农机装备湖南省重点实验室长沙410128

马铃薯切块播种是节约用种成本、打破薯种休眠的有效途径,针对马铃薯播种机传统圆形取种勺对切块薯种适应性较差,导致漏播率高,播种合格率低的问题,对马铃薯播种机取种勺进行了设计与仿真优化。在测定薯种力学特性参数的基础上,利用EDE... 详细信息

马铃薯切块播种是节约用种成本、打破薯种休眠的有效途径,针对马铃薯播种机传统圆形取种勺对切块薯种适应性较差,导致漏播率高,播种合格率低的问题,对马铃薯播种机取种勺进行了设计与仿真优化。在测定薯种力学特性参数的基础上,利用EDEM软件,选取Hertz-Mindlin接触模型,构建了切块薯种离散元模型。通过对切块薯种取种充种状态进行分析,以传统圆形取种勺为基础,设计了一种切口式马铃薯播种机取种勺,并确定了影响取种效果的主要因素。以切口圆心角、切口深度和切口个数为试验因素,以取种成功率、重种率和空种率为评价指标,开展三因素三水平虚拟仿真正交试验。正交试验结果表明:切口式取种勺取种能力明显优于传统圆形取种勺,当切口圆心角为60°,切口深度为15 mm、切口数量为3个时,其取种效果最优。利用优化后的取种勺进行切块薯种播种验证试验,结果表明:播种取种成功率为82.2%,重种率为7.1%,空种率为10.7%,相比于传统圆形种勺,其重种率降低约12个百分点,取种成功率提升约12.5个百分点。

关键词：马铃薯切块薯种取种勺 EDEM 正交试验

Solvent-Free Synthesis of Ultrafine Tungsten Carbide Nanoparticles-Decorated Carbon Nanosheets for Microwave Absorption

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Nano-Micro Letters 2020年第11期12卷 141-153页

作者： Yunlong Lian Binhua Han dawei liu Yahui Wang Honghong Zhao Ping Xu Xijiang Han Yunchen Du MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001People’s Republic of China

Carbides/carbon composites are emerging as a new kind of binary dielectric systems with good microwave absorption ***,we obtain a series of tungsten carbide/carbon composites through a simple solvent-free strategy,where the solid mixture of dicyandiamide(DCA)and ammonium metatungstate(AM)is employed as the *** cubic WC1-x nanoparticles(3-4 nm)are in situ generated and uniformly dispersed on carbon *** configuration overcomes some disadvantages of conventional carbides/carbon composites and is greatly helpful for electromagnetic *** is found that the weight ratio of DCA to AM can regulate chemical composition of these composites,while less impact on the average size of WC1-x *** the increase in carbon nanosheets,the relative complex permittivity and dielectric loss ability are constantly enhanced through conductive loss and polarization *** different dielectric properties endow these composites with distinguishable attenuation ability and impedance *** DCA/AM weight ratio is 6.0,the optimized composite can produce good microwave absorption performance,whose strongest reflection loss intensity reaches up to-55.6 dB at 17.5 GHz and qualified absorption bandwidth covers 3.6-18.0 GHz by manipulating the thickness from 1.0 to 5.0 *** a performance is superior to many conventional carbides/carbon composites.

关键词： Solvent-free synthesis Tungsten carbide/carbon composite Ultrafine nanoparticle Microwave absorption Dielectric loss

Surface modification of metal-organic frameworks under sublimated iron-atmosphere by controlled carbonization for boosted oxygen evolution reaction

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Nano Research 2022年第7期15卷 5884-5894页

作者： Katam Srinivas Xin Chen dawei liu Fei Ma Xiaojuan Zhang Wanli Zhang Hua Lin Yuanfu Chen School of Electronic Science and Engineering and State Key Laboratory of Electronic Thin Films and Integrated DevicesUniversity of Electronic Science and Technology of ChinaChengdu 610054China School of Materials and Energy Southwest UniversityChongqing 400715China College of Science and Institute of Oxygen SupplyTibet UniversityLhasa 850000China

Development of cost-effective,efficient,and durable electrocatalysts for oxygen evolution reaction(OER)with fast kinetic reaction is highly significant,considering the elevated thermodynamic energy barrier involved in water *** overcome such challenges,an innovative vapor phased iron-doping strategy is employed on carbon nanotubes(CNT)-interlinked metalorganic framework(MOF)nanosheets(Ni-MOF@CNT)to obtain mixed metal oxide and metal heteronanoparticles superficially implanted partially(semi)-decomposed MOF nanosheets(Ni-M@C-400).These semi-MOF nanosheets attain the structural privileges related to MOF-nanostructure,mixed metal nanoparticles synergism,interconnected-CNT assisted high conductivity,and mechanical *** a result,Ni-M@C-400 exhibits exceptional OER activity with overpotential as low as 229 mV to reach the benchmark current density of 10 mA/cm^(2)(η10)and exhibits greatly reduced thermodynamic barrier(Tafel slopes of 40.51 mV/dec)along with significant durability for~60 *** importantly,this sublimated iron-doped semi-MOF(Ni-M@C-400)displays significantly better OER performance over the corresponding annealed bimetallic MOF(NiFe-M@C-400:270 mV atη10).Moreover,the successful incorporation of vapor phased iron into variety of MOFs(Cr,Mn,Co,Ni,and Cu)approved its uniqueness and the *** work provides an innovative vapor phased heteroatom-doping strategy to develop costeffective and efficient electrocatalysts for water electrolysis.

关键词： metal-organic frameworks(MOFs) semi-MOFs controlled carbonization heteronanoparticles oxygen evolution reaction

育苗播种流水线检测技术及控制系统的研究与展望

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农业工程与装备 2024年第1期51卷 1-6页

作者：顾辰昊刘大为刘安稳邹学杰李建国湖南农业大学机电工程学院湖南长沙410128 智能农机装备湖南重点实验室湖南长沙410128 沅江市农机事务中心湖南沅江413199

育苗播种流水线是工厂化育苗的关键装备,可有效减少育苗过程中的种子使用量、保证出苗整齐、提高移栽成活率,但当前我国研制的育苗播种流水线仍存在播种质量合格率偏低、流水线运行速度与排种器工作速度配合不佳等问题。通过总结和分析... 详细信息

育苗播种流水线是工厂化育苗的关键装备,可有效减少育苗过程中的种子使用量、保证出苗整齐、提高移栽成活率,但当前我国研制的育苗播种流水线仍存在播种质量合格率偏低、流水线运行速度与排种器工作速度配合不佳等问题。通过总结和分析育苗播种流水线检测技术、控制系统、补种装置的研究现状,详细阐述了其工作原理、应用场景及优缺点,以期为育苗播种流水线的研究和发展提供一定参考。

关键词：育苗播种流水线补种装置检测技术控制系统