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Experimental Study on the Molten Salt at Micron Scale during the Melting Process

Journal of Thermal Science 2024年第1期33卷 70-85页

作者： TIAN Ziqian LIAO Zhirong XU Chao FANG Yongzhe JIANG Kaijun yuan mengdi Key Laboratory of Power Station Energy Transfer Conversion and System Ministry of Education of ChinaSchool of Energy Power and Mechanical EngineeringNorth China Electric Power UniversityBeijing 102206China

The investigation of the melting behaviors of the molten salt at micron scale during the melting process is critical for explaining the solid-liquid phase transition *** this paper,a novel experimental system and analysis method were proposed to study the melting process with three heating rates in the range of1-10℃/min of the solar salt at micron *** solid-liquid boundary morphology and phase transition kinetics of molten salt particles were focused ***,the correlations between liquid fraction,temperature and time under different heating rates were *** solid-liquid boundary morphology was depicted by the visualized experimental set-up,and the instantaneous liquid volume fraction during the non-isothermal phase transition was ***,the correlation between temperature and liquid volume fraction was proposed to reveal the evolution of the solid-liquid boundary with temperature at different heating ***,the non-isothermal phase transition kinetic equation was established by introducing a constant parameter(V_(a,b)),and more kinetic parameters such as 1g V_(a,b) and-lg V_(a,b)/b were *** results showed that the exponent b is not sensitive to the heating rate with a range of 3-5 for solar salt ***,the heating rate influences the value of V_(a,b) and presents a positive ***,the non-isothermal phase transition kinetic equations at different heating rates in the range of 1-10℃/min can be quickly predicted by the proposed improved experimental test *** study could fill the research insufficiency and provide significant guidance for future research on the solid-liquid transition mechanism of molten salts at micron scale.

关键词： molten salt non-isothermal phase transition solid-liquid boundary morphology liquid volume fraction micron scale melting process

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A Comprehensive Study of a Low-Grade Heat-Driven Cooling and Power System Based on Heat Current Method

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Journal of Thermal Science 2024年第4期33卷 1523-1541页

作者： ZHAO Tian XU Ronghong XIN Yonglin HE Kelun MA Huan yuan mengdi CHEN Qun School of Energy Storage Science and Engineering North China University of TechnologyBeijing100144China Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Department of Engineering MechanicsTsinghua UniversityBeijing100084China

Combined cooling and power(CCP)system driven by low-grade heat is promising for improving energy *** work proposes a CCP system that integrates a regenerative organic Rankine cycle(RORC)and an absorption chiller on both driving and cooling fluid *** system is modeled by using the heat current method to fully consider nonlinear heat transfer and heat-work conversion constraints and resolve its behavior *** off-design system simulation is performed next,showing that the fluid inlet temperatures and flow rates of cooling water as well as RORC working fluid strongly affect system *** off-design operation even becomes infeasible when parameters deviate from nominal values largely due to limited heat transfer capability of components,highlighting the importance of considering heat transfer constraints via heat current *** optimization aiming to minimize the total thermal conductance is also *** efficiency increases by 7.9%and decreases by 12.4%after optimization,with the hot fluid inlet temperature increase from 373.15 to 403.15 K and mass flow rate ranges from 10 to 30 kg/s,emphasizing the necessity of balancing system cost and performance.

关键词： combined cooling and power system organic Rankine cycle absorption chiller cascade heat utilization heat current method off-design analysis

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压路机驾驶室告警信息优化设计研究

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包装工程 2024年第16期45卷 455-462页

作者：王菊苑梦迪寇成龙中国矿业大学江苏徐州221116 徐州市工业设计学会江苏徐州221018 郑州时空隧道信息技术有限公司郑州450000

目的为了提高驾驶员在驾驶过程中对告警信息的认知效率,以便更好地做出反馈,进而降低事故的发生,提高安全性。方法通过分析压路机告警信息的呈现方式,并解析其设计要素,再用层次分析法确定设计要素的权重,从中筛选出影响告警信息认知效... 详细信息

目的为了提高驾驶员在驾驶过程中对告警信息的认知效率,以便更好地做出反馈,进而降低事故的发生,提高安全性。方法通过分析压路机告警信息的呈现方式,并解析其设计要素,再用层次分析法确定设计要素的权重,从中筛选出影响告警信息认知效率的关键设计要素,通过眼动生理实验对关键设计要素因子进行模拟实验,确定认知效率高的压路机驾驶室告警信息设计因子。结论在设计因子的基础上,完成压路机驾驶室告警信息设计方案,并通过眼动仪生理模拟实验确定最优设计方案,完成对告警信息认知效率的提升。

关键词：压路机驾驶室告警信息认知效率设计优化

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新时代提升林业工程学科研究生创新能力的思考

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大学（研究与管理） 2024年第5期 133-136页

作者：袁梦迪许民东北林业大学材料科学与工程学院黑龙江哈尔滨150000

进入新时代以来,我国研究生教育从快速发展转为高质量发展,提升研究生创新能力、培养拔尖创新人才是研究生高质量发展的必经之路,更是我国从研究生教育大国迈向研究生教育强国的必然要求。文章以林业工程学科研究生为研究对象,分析提升... 详细信息

进入新时代以来,我国研究生教育从快速发展转为高质量发展,提升研究生创新能力、培养拔尖创新人才是研究生高质量发展的必经之路,更是我国从研究生教育大国迈向研究生教育强国的必然要求。文章以林业工程学科研究生为研究对象,分析提升研究生创新能力的必要性和影响因素,提出了构建新型教学模式、建设“本硕博”一体化培养体系、搭建学术交流平台等对策,旨在为林业工程学科拔尖人才的培养提供参考。

关键词：创新能力林业工程研究生

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A switchable concentrating photovoltaic/concentrating solar power(CPV/CSP)hybrid system for flexible electricity/thermal generation

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Science China(Technological Sciences) 2023年第8期66卷 2332-2345页

作者： PAN XinYu yuan mengdi JU Xing XU Chao Key Laboratory of Power Station Energy Transfer Conversion and System of Ministry of Education School of Energy Power and Mechanical EngineeringNorth China Electric Power UniversityBeijing 102206China

Due to the intermittency and indeterminacy of solar irradiance,balancing energy supply and load demand remains a *** paper proposed a switchable hybrid system that combines concentrating photovoltaic/concentrating solar power(CPV/CSP)technology with thermal energy storage(TES)to achieve flexible electricity and thermal generation by adjusting the incident solar flux of photovoltaic(PV).The hybrid system can directly transfer surplus solar energy into high-quality heat for storage using a rotatable PV/heat *** simulated results demonstrated that the hybrid system effectively improves power generation,optimally utilizes TES capacity,and reduces the levelized cost of electricity(LCOE).Over a selected seven-day period,the single-junction(1J)Ga As solar cells used in the hybrid system sustainably satisfied the load demand for more than five days without grid supplement,outperforming the CSP plant by an additional two *** hybrid system utilizing the 1J Ga As with the base configuration of solar multiple(SM)of 1.26 and TES capacity of 5 h improved the annual power production and renewable penetration(RP)by 20.8%and 24.8%compared with the conventional CSP plant,*** hybrid plant with monosilicon and a configuration of SM(1.8),PV ratio(1),and TES capacity(6 h)achieved an optimal LCOE of11.52$ct/k Wh and RP of 75.5%,which is 8.8%lower and 12.1%higher than the CSP plant,respectively.

关键词： concentrated photovoltaic concentrated solar power hybrid system flexible electricity/thermal ratio techno-economic analysis

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创伤后应激障碍音乐治疗的范围综述

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神经损伤与功能重建 2024年第4期19卷 230-234页

作者：马依鸣张洪光袁梦迪钟宝亮中国地质大学(武汉)心理科学与健康研究中心武汉430074 华中科技大学同济医学院附属武汉精神卫生中心武汉430012

目的:从干预措施分类和组成部分的角度描述音乐治疗在创伤后应激障碍(post-traumatic stress disorder,PTSD)的干预方法,并从临床应用角度分析其发展,为未来该领域研究提供新的见解。方法:以Arksey和O’Malley研究的范围综述指南为方法... 详细信息

目的:从干预措施分类和组成部分的角度描述音乐治疗在创伤后应激障碍(post-traumatic stress disorder,PTSD)的干预方法,并从临床应用角度分析其发展,为未来该领域研究提供新的见解。方法:以Arksey和O’Malley研究的范围综述指南为方法学框架,系统检索了主要中英文电子数据库(中国知网、PubMed、Cochrane Library、Web of Science、Embase、Medline)中音乐治疗对PTSD干预措施的相关文献,提取音乐治疗措施和疗效的数据,进行综合分析。结果:共纳入18篇研究。纳入研究的对象包括经历因战争、躯体残疾、暴力虐待、恐怖事件等而PTSD的患者;音乐干预主要以团体形式、接受式聆听方式为主,音乐没有作为单独的干预手段,通常与药物治疗联合;多数研究显示,与常规治疗组相比,音乐治疗组有效改善了PTSD患者的核心症状和伴随症状。结论:现有研究采取了多种音乐干预措施来减轻PTSD患者的回避、再体验、睡眠、焦虑、抑郁等症状,但尚无统一技术标准或指南以指导音乐干预措施的制定。PTSD患者的临床异质性表明了只有多样化和个性化音乐治疗方案才能有效的满足患者群体的需求。整体而言,该领域研究尚存在许多不足,发展标准化的音乐治疗技术指南是当前的紧迫工作。

关键词：音乐治疗创伤后应激障碍范围综述

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Preparation and Thermal Stability of AlMoON Based Solar Selective Absorption Coating

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Journal of Wuhan University of Technology(Materials Science) 2024年第4期39卷 854-862页

作者：闵捷 yuan Wenxu CHEN Yufei LAN Yapeng YAN mengdi LIU Hanze CHENG Xudong 代路 Hubei Provincial Key Laboratory of Green Materials for Light Industry Hubei University of TechnologyWuhan 430068China Col-laborative Innovation Center of Green Light-weight Materials and Processing Hubei University of TechnologyWuhan 430068China School of Materials and Chemical Engineering Hubei University of TechnologyWuhan 430068China School of Industrial Design Hu-bei University of TechnologyWuhan 430068China State Key Laboratory of Advanced Technology for Materials Synthesis and Process-ing Wuhan University of TechnologyWuhan 430070China Science and Technology on Thermal Energy and Power Laboratory Wuhan Second Ship Design&Research InstituteWuhan 430205China

AlMoON based solar selective absorption coatings were deposited on stainless steel substrate by magnetron *** coatings included infrared reflection layer Mo,absorption layer AlMoN,absorption layer AlMoON and antireflection layer AlMoO from bottom to *** surface of the deposited coatings is flat without obvious *** absorptivity and emissivity are 0.896 and 0.09,respectively,and the quality factor is *** heat treatment at 500℃-36 h,the surface roughness of the coating increases,a small number of cracks and other defects appear,and the broken part is still attached to the coating surface.A certain degree of element diffusion occurs in the coatings,resulting in the decline of the optical properties of the *** absorptivity and emissivity are 0.883 and 0.131,respectively,the quality factor is 7.06,and the PC value is *** coatings do not fail under this condition and have certain thermal stability.

关键词： AlMoON coating preparation thermal stability

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The construction and optimization of engineered yeast chassis for efficient biosynthesis of 8-hydroxygeraniol

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mLife 2023年第4期2卷 438-449页

作者： Yu Zhang mengdi yuan Xinxin Wu Qiuhui Zhang Yuzhu Wang Liming Zheng Tsan-Yu Chiu Huiming Zhang Lei Lan Feng Wang Ying Liao Xuemei Gong Shirui Yan Yun Wang Yue Shen Xian Fu BGI Research ShenzhenChina BGI Research HangzhouChina Guangdong Provincial Key Laboratory of Genome Read and Write BGI ResearchShenzhenChina BGI Research ChangzhouChina

Microbial production of monoterpenoid indole alkaloids(MIAs)provides a sustainable and eco-friendly means to obtain compounds with high pharmaceutical ***,efficient biosynthesis of MIAs in heterologous microorganisms is hindered due to low supply of key precursors such as geraniol and its derivative 8-hydroxygeraniol catalyzed by geraniol 8-hydroxylase(G8H).In this study,we developed a facile evolution platform to screen strains with improved yield of geraniol by using the SCRaMbLE system embedded in the Sc2.0 synthetic yeast and confirmed the causal role of relevant genomic *** genome mining,we identified several G8H enzymes that perform much better than the commonly used CrG8H for 8-hydroxygeraniol production in *** further showed that the N-terminus of these G8H enzymes plays an important role in cellular activity by swapping ***,the combination of the engineered chassis,optimized biosynthesis pathway,and utilization of G8H led to the final strain with more than 30-fold improvement in producing 8-hydroxygeraniol compared with the starting ***,this study will provide insights into the construction and optimization of yeast cells for efficient biosynthesis of 8-hydroxygeraniol and its derivatives.

关键词： 8-hydroxygeraniol biosynthesis G8H SCRaMbLE synthetic yeast

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Erratum to:Detecting gravitational wave with an interferometric seismometer array on lunar nearside[***.66,109513(2023)]

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Science China(Physics,Mechanics & Astronomy) 2024年第1期67卷 182-183页

作者： Junlang Li Fangfei Liu yuan Pan Zijian Wang mengdi Cao Mengyao Wang Fan Zhang Jinhai Zhang Zong-Hong Zhu Department of Astronomy Beijing Normal UniversityBeijing 100875China Advanced Institute of Natural Sciences Beijing Normal University at ZhuhaiZhuhai 519087China Institute for Frontiers in Astronomy and Astrophysics Beijing Normal UniversityBeijing 102206China Engineering Laboratory for Deep Resources Equipment and Technology Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China

This paper"Detecting gravitational wave with an interferometric seismometer array on lunar nearside"[1]was published in SCIENCE CHINA Physics,Mechanics&Astronomy(66,109513(2023),doi:10.1007/s11433-023-2179-9).Due to an oversight on our part,some errors were made in the originally published *** apologize for these errors and offer the corresponding explanations and corrections for the readers.

关键词： gravitational seism wave

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Collective Molecular Machines: Multidimensionality and Reconfigurability

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Nano-Micro Letters 2024年第8期16卷 309-340页

作者： Bin Wang yuan Lu Department of Chemical Engineering Tsinghua UniversityBeijing 100084People’s Republic of China Key Laboratory of Industrial Biocatalysis Ministry of EducationTsinghua UniversityBeijing 100084People’s Republic of China

Molecular machines are key to cellular activity where they are involved in converting chemical and light energy into efficient mechanical *** the last 60 years,designing molecular structures capable of generating unidirectional mechanical motion at the nanoscale has been the topic of intense *** progress has been made,attributed to advances in various fields such as supramolecular chemistry,biology and nanotechnology,and ***,individual molecular machines are only capable of producing nanometer work and generally have only a single *** order to address these problems,collective behaviors realized by integrating several or more of these individual mechanical units in space and time have become a new *** this review,we comprehensively discuss recent developments in the collective behaviors of molecular *** particular,collective behavior is divided into two *** is the appropriate integration of molecular machines to efficiently amplify molecular motions and deformations to construct novel functional *** other is the construction of swarming modes at the supramolecular level to perform nanoscale or microscale *** discuss design strategies for both modes and focus on the modulation of features and ***,in order to address existing challenges,the idea of transferring experience gained in the field of micro/nano robotics is presented,offering prospects for future developments in the collective behavior of molecular machines.

关键词： Molecular machines Collective control Collective behaviors DNA Biomolecular motors

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