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Investigating the effect of volatility on the hygroscopicities of acetate nanoparticle aerosols by surface plasmon resonance microscopy

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Journal of Environmental Sciences 2024年第4期138卷 167-178页

作者： Bo yang Zhibo Xie jianguo Liu Huaqiao Gui Jiaoshi Zhang Xiuli Wei Zetao Fan Douguo Zhang Key Laboratory of Environmental Optics and Technology Anhui Institute of Optics and Fine MechanicsHefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China CAS Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Advanced Laser Technology Laboratory of Anhui Province Department of Optics and Optical EngineeringUniversity of Science and Technology of ChinaHefei 230026China

Under high relative humidity(RH)conditions,the release of volatile components(such as acetate)has a significant impact on the aerosol *** this work,one surface plasmon resonance microscopy(SPRM)measurement system was introduced to determine the hygroscopic growth factors(GFs)of three acetate aerosols separately or mixed with glucose at different *** Ca(CH_(3)COO)_(2) or Mg(CH_(3)COO)_(2) aerosols,the hygroscopic growth trend of each time was lower than that of the previous time in three cyclic humidification from 70% RH to 90% RH,which may be due to the volatility of acetic acid leading to the formation of insoluble hydroxide(Ca(OH)_(2) or Mg(OH)_(2))under high RH *** the third calculated GF(using the Zdanovskii-Stokes-Robinson method)for Ca(CH_(3)COO)_(2) or Mg(CH_(3)COO)_(2) in bicomponent aerosols with 1:1 mass ratio were 3.20% or 5.33% lower than that of the first calculated GF at 90% *** calculated results also showed that the hygroscopicity change of bicomponent aerosol was negatively correlated with glucose content,especially when the mass ratio of Mg(CH_(3)COO)_(2) to glucose was 1:2,the GF at 90% RH only decreased by4.67% after three cyclic *** coupled plasma atomic emission spectrum(ICP-AES)based measurements also indicated that the changes of Mg^(2+)concentration in bicomponent was lower than that of the *** results of this study reveal thatduring the efflorescence transitions of atmospheric nanoparticles,the organic acids diffusion rate may be inhibited by the coating effect of neutral organic components,and the particles aging cycle will be prolonged.

关键词： Hygroscopic growth Volatility Acetate aerosols Nanoparticle aerosol Surface plasmon resonance

Investigation of weight updating modes on oxide-based resistive switching memory synapse towards neuromorphic computing applications

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Science China(Information Sciences) 2021年第11期64卷 253-254页

作者： Qingting DING Tiancheng GONG Jie YU Xiaoxin XU Xiaoyan LI Hangbing LV jianguo yang Qing LUO Peng YUAN Feng ZHANG Ming LIU Institute of Microelectronics Chinese Academy of Sciences University of Chinese Academy of Sciences

Dear editor,Memristors, resistive random access memory(RRAM) devices when used in memory applications, have attracted significant interest recently as a promising candidate for neuromorphic computing systems due to their excellent size scalability, fast switching speed and low energy consumption [1].In order to obtain high learning accuracy in neural networks based on back propagation learning rule, the updating behavior of synaptic linear symmetric weights is important [2].

关键词： Gate Voltage Ramping (GVR) Constant Drain Voltage (CDV) Time Lag Plot RTN neuromorphic computing

Clean and Highly Efficient Utilization of Coal

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Bulletin of the Chinese Academy of Sciences 2011年第1期25卷 56-58页

作者： WANG jianguo yang Li State Key Laboratory of Coal Conversion Institute of Coal Chemisl~/Chinese Academy of Sciences Taiyuan 030001 P.R. China

Clean and highly efficient utilization of coal is an important scientific and technological *** the petroleum resource decreases but its consumption increases, all of the countries in the world have to face the big issue of sustainable development of energy and economy and protection of ***, study on clean coal technology (CCT) has attracted much attention and become one of important themes of energy research.

关键词：高效利用煤炭石油资源

Numerical Study of Gas-Liquid Two-Phase Flow in PEMFC Cathode Flow Channel with Different Diffusion Layer Surface Structure

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Journal of Power and Energy Engineering 2021年第11期9卷 106-117页

作者： Kai Wang Zhuocheng Liu jianguo yang Harbin Institute of Technology Weihai China

Proton exchange membrane fuel cell (PEMFC) reaction byproduct water is eventually discharged from the cathode channel through the surface of the diffusion layer (GDL). Although there are many studies on the kinetic behavior of liquid water in the cathode flow channel, there is still a lack of literature on water transport behavior in the flow channel considering the pore structure distribution on the GDL surface. In this paper, the effect of different size liquid water inlet arrangements on the GDL surface on the water management performance of the cathode runner is investigated. The volume of fluid (VOF) model is used to simulate the gas-liquid two-phase flow phenomenon in the channel. The results show that the droplet size discharged from the cathode flow channel is basically the uniformity when the liquid water inlet is distributed in gas flow from the largest to the smallest in size. At the same time, the maximum total liquid water content achievable in the flow channel, the maximum GDL surface coverage is the smallest, and the cathode flow channel has the best water management performance. The effect of pore structure distribution on the surface of GDL should be considered when conducting the study of water transport behavior in the cathode flow channel to reveal further the transport process of liquid water in the cathode channel and the removal mechanism.

关键词： PEMFC VOF GDL Structure Water Management

Obliteration of empty sella for therapy of empty sella syndrome by transsphenoidal and tranfrontal approach

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吉林大学学报(医学版) 1997年第1期 42-45页

作者： Zhao Xiaodong,Zhu jianguo,yang Zhanquan (Department of Otorhinolaryngology,Head and Neck Surgery)

作者报道７例空蝶鞍综合征，其中原发性２例，继发性５例。经蝶窦进路充填法手术治疗５例，经额进路治疗２例。除１例因有原发性脑积水未愈外，余６例治愈。本病与鞍隔缺损、良性颅内高压、长期服用嗅隐亭、垂体手术或放疗后有关。临床... 详细信息

作者报道７例空蝶鞍综合征，其中原发性２例，继发性５例。经蝶窦进路充填法手术治疗５例，经额进路治疗２例。除１例因有原发性脑积水未愈外，余６例治愈。本病与鞍隔缺损、良性颅内高压、长期服用嗅隐亭、垂体手术或放疗后有关。临床以头痛、视力视野损害和垂体功能低下为主要特点。经蝶窦充填法治疗是简单有效的方法。

关键词： Empty sella syndrome Surgery Operation

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阻镉剂对蔬菜高效安全种植的影响

安徽农学通报 2024年第8期30卷 74-79页

作者：梁成亮李倩闵子扬戴雄泽李鑫张竹青杨建国汪端华湖南省蔬菜研究所湖南长沙410125 湖南农业大学湖南长沙410128

为探究阻镉剂对蔬菜种植的影响,采用大田试验开展了丝瓜、四季豆、叶用番薯和苋菜4种蔬菜的安全性种植评价,以及配套降镉栽培技术研究,包括土壤pH值调控、RSD降镉试验和阻镉剂使用。结果表明,在土壤镉含量≤1.0 mg/kg条件下,丝瓜、叶用... 详细信息

为探究阻镉剂对蔬菜种植的影响,采用大田试验开展了丝瓜、四季豆、叶用番薯和苋菜4种蔬菜的安全性种植评价,以及配套降镉栽培技术研究,包括土壤pH值调控、RSD降镉试验和阻镉剂使用。结果表明,在土壤镉含量≤1.0 mg/kg条件下,丝瓜、叶用番薯和四季豆3种蔬菜均可以安全种植,其产品镉含量低于标准限量值;在蔬菜种植基地施用阻镉剂可使土壤pH值提高19.04%,而RSD法可使土壤pH值提高54.45%,RSD降镉钝化效果明显优于阻镉剂。综合考虑长期效应、施用成本、用量、增产提质效果和其他环境风险等因素,推荐RSD法用于重金属钝化处理,还可结合阻镉剂、提高土壤pH值等栽培措施,以达到安全种植的目的。

关键词：镉污染阻镉剂土壤强还原灭菌技术蔬菜安全种植技术

Synthesis of a novel multi-SO_3H functionalized strong BrФnsted acidic ionic liquid and its catalytic activities for acetalization

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Chinese Science Bulletin 2009年第21期54卷 3958-3964页

作者： ZHANG Jing BAO ShaoHua yang jianguo Key Laboratory of Green Chemistry and Chemical Process of Shanghai Department of Chemistry East China Normal UniversityShanghai 200062 China

The novel multi-SO3H functionalized strong BrФnsted acidic ionic liquid has been prepared and its catalytic activities were investigated through the acetalization. The results showed that the novel catalyst was very efficient for the reaction with the average yield over 90% under solvent-free condition at room temperature. Operational simplicity, without need of any solvent, a small amount of usage, low cost of the catalyst used, high yields, applicability to large-scale reactions and reusability are the key features of this methodology. The novel catalyst also has great potential for the green process.

关键词：酸性离子液体催化活动缩醛新型催化剂无溶剂条件 Br 合成反应效率

Growth and inhibition of zinc anode dendrites in Zn-air batteries:Model and experiment

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Chinese Journal of Chemical Engineering 2024年第3期67卷 268-281页

作者： Cuiping He Qingyi Gou Yanqing Hou jianguo Wang Xiang You Ni yang Lin Tian Gang Xie Yuanliang Chen Kunming University of Science and Technology State Key Laboratory of Complex Nonferrous Metal Resources Clean UtilizationKunming 650093China Kunming University of Science and Technology Faculty of Metallurgical and Energy EngineeringKunming 650093China China Copper Co.Ltd KunmingYunnan 650051China State Key Laboratory of Advanced Metallurgy for Non-ferrous Metals Kunming 650051China Sichuan Shunying Power Battery Materials Co.Ltd Sichuan 620076China

Zinc(Zn)-air batteries are widely used in secondary battery research owing to their high theoretical energy density,good electrochemical reversibility,stable discharge performance,and low cost of the anode active material ***,the Zn anode also leads to many challenges,including dendrite growth,deformation,and hydrogen precipitation *** this context,Zn dendrite growth has a greater impact on the cycle *** this dissertation,a dendrite growth model for a Zn-air battery was established based on electrochemical phase field theory,and the effects of the charging time,anisotropy strength,and electrolyte temperature on the morphology and growth height of Zn dendrites were studied.A series of experiments was designed with different gradient influencing factors in subsequent experiments to verify the theoretical simulations,including elevated electrolyte temperatures,flowing electrolytes,and pulsed *** simulation results show that the growth of Zn dendrites is controlled mainly by diffusion and mass transfer processes,whereas the electrolyte temperature,flow rate,and interfacial energy anisotropy intensity are the main *** experimental results show that an optimal electrolyte temperature of 343.15 K,an optimal electrolyte flow rate of 40 ml·min^(-1),and an effective pulse charging mode.

关键词： Zn-air battery Zinc anode Zinc dendrite Simulated dendrite growth Inhibit dendrite growth Phase-field model

Design and optimization of fluid lubricated bearings operated with extreme working performances——a comprehensive review

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International Journal of Extreme Manufacturing 2024年第2期6卷 325-376页

作者： Guohua Zhang Ming Huang Gangli Chen Jiasheng Li yang Liu jianguo He Yueqing Zheng Siwei Tang Hailong Cui Institute of Machinery Manufacturing Technology China Academy of Engineering PhysicsMianyangSichuan 621999People’s Republic of China

Fluid lubricated bearings have been widely adopted as support components for high-end equipment in metrology,semiconductor devices,aviation,strategic defense,ultraprecision manufacturing,medical treatment,and power *** all these applications,the equipment must deliver extreme working performances such as ultraprecise movement,ultrahigh rotation speed,ultraheavy bearing loads,ultrahigh environmental temperatures,strong radiation resistance,and high vacuum operation,which have challenged the design and optimization of reliable fluid lubricated *** of any related bottlenecks will promote the development course of high-end *** promote the advancement of high-end equipment,this paper reviews the design and optimization of fluid lubricated bearings operated at typical extreme working performances,targeting the realization of extreme working performances,current challenges and solutions,underlying deficiencies,and promising developmental *** paper can guide the selection of suitable fluid lubricated bearings and optimize their structures to meet their required working performances.

关键词： fluid lubricated bearings structural design performance optimization extreme working performances