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A miniature liquid helium temperature JT cryocooler for space application

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Science China(Technological Sciences) 2014年第11期57卷 2236-2240页

作者： QUAN jia ZHOU ZhenJun LIU YanJie LI jianGuo MA YueXue LIANG jingtao Technical Institute of Physics and Chemistry Chinese Academy of Sciences University of Chinese Academy of Sciences

Along with the development of space science and technology,miniature liquid helium temperature long life cryocooler is a focus subject in cryogenic *** it is the precondition of space detection researches,institutions of space in many countries do the research on *** this article,we designed a compound cooling system.A three-stage high frequency thermal coupled pulse tube cryocooler was used to precool a Joule-Thomson(JT)*** system has no moving parts at low temperatures and is hence suitable for space *** helium temperature was successfully achieved in both open loop and closed cycle *** the closed cycle experiment,when 473 W electric power was inputted,the cooling system reached a no-load temperature of 4.4 K,and a cooling capacity of 11.6 mW was provided at 4.54 *** is the first miniature liquid helium temperature JT cryocooler in China and the research achievement paves a way for the space application of ultra-long wave infrared detection and THz technologies.

关键词： liquid helium temperature JT cryocooler space application

4 K high frequency pulse tube cryocooler used for terahertz space application

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Chinese Science Bulletin 2014年第27期59卷 3490-3494页

作者： jia Quan Yanjie Liu Dong Liu Kun Zhang jingtao Liang Jing Li Qijun Yao Shengcai Shi Key Laboratory of Space Energy Conversion Technologies Technical Institute of Physics and Chemistry Chinese Academy of Sciences University of Chinese Academy of Sciences Key laboratory of Radio Astronomy Purple Mountain Observatory Chinese Academy of Sciences

Terahertz(THz) frequency region, defined from0.1 to 10 THz, is an important frequency band for radio astronomy and atmospheric science. As NbN Superconductor-Insulator-Superconductor(SIS) mixers used for terahertz detection, which are studied by the Purple Mountain Observatory(PMO), Chinese Academy of Sciences(CAS), work at 8–10 K, and require condition of micro vibrations, its astronomical observation in aerospace is limited by suitable refrigeration method. 4 K high frequency pulse tube cryocooler developed by Key Laboratory of Space Energy Conversion Technologies(SECT), Technical Institute of Physics and Chemistry(TIPC), CAS, offers an opportunity for the application of SIS mixers. This article introduces the progress of the two-stage high frequency pulse tube cryocooler researched by TIPC. The cryocooler has reached a no load temperature of 4.5 K which is the lowest temperature for this kind of cryocooler reported so far. The successful coupling between the THz component and the high frequency pulse tube cryocooler lays a solid foundation for space detection in the terahertz band.

关键词：脉冲管制冷机太赫兹高频空间应用紫金山天文台能源转换技术重点实验室大气科学

性腺疾病研究领域年度新进展——2014年8月至2015年7月

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中华内分泌代谢杂志 2016年第4期32卷 269-272页

作者：崔佳窦京涛解放军总医院内分泌科北京100853

随着影像学、生化检测以及分子生物学技术的不断进步，自2014年8月至2015年7月，国内外关于性腺疾病领域研究进展迅猛。有大量文献从不同角度探讨了性腺疾病的发病机制、基因诊断、临床诊断以及干预治疗方法。现就其中对临床工作有更多... 详细信息

随着影像学、生化检测以及分子生物学技术的不断进步，自2014年8月至2015年7月，国内外关于性腺疾病领域研究进展迅猛。有大量文献从不同角度探讨了性腺疾病的发病机制、基因诊断、临床诊断以及干预治疗方法。现就其中对临床工作有更多借鉴意义的部分经典病种文献进行汇总分析，以供临床医师参考。

关键词：性腺疾病 46 XY性发育异常 Klinefelter综合征先天性肾上腺皮质增生症 Turner综合征特发性低促性腺激素性性腺功能减退症多囊卵巢综合征

Effects of Three Humic Acid Foliar Fertilizers on Quality and Photosynthetic Characteristics of Hawthorn

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Asian Agricultural Research 2024年第7期16卷 48-52页

作者： jia WANG Xinyu LUO Heli SHANG Dongsheng LAN Qi LIU jingtao ZHU College of Horticultural Science&Technology Hebei Normal University of Science&TechnologyQinhuangdao 066000China Bureau of Agriculture and Rural Affairs of Kuancheng Manchu Autonomous County Chengde 067300China Hebei(Chengde)Hawthorn Industry Technology Research Institute Chengde 067304China

[Objectives]To investigate the effects of three foliar fertilizers on photosynthetic characteristics,fruit quality and yield of hawthorn.[Methods]Taking hawthorn foliar fertilization as the reference,the photosynthetic rate,transpiration rate,intercellular CO 2 concentration,stomatal conductance and single fruit weight of hawthorn leaves were measured under different concentrations of foliar fertilizer.[Results]The results showed that the photosynthetic rate,transpiration rate and stomatal conductance of hawthorn leaves increased significantly,while the intercellular CO 2 concentration ***,the fish protein peptide foliar fertilizer performed best,with net photosynthetic rate and transpiration rate increased by 57.22%and 57.51%,*** the three foliar fertilizers significantly reduced the intercellular CO 2 *** addition,fertilization significantly increased the single fruit weight of hawthorn,and the effect of fermented fulvic acid foliar fertilizer was the most significant,with the highest growth rate of 68.49%.[Conclusions]Spraying foliar fertilizer significantly increased the content of Vc,titratable acid,anthocyanin and soluble solids of hawthorn fruit,among which fermented fulvic acid foliar fertilizer had the optimal effect.

关键词： Hawthorn Humic acid Fulvic acid Fish protein peptide Leaf function Fruit quality

Biosorption of Cd from Aqueous Solution by Live and Dead Biomass of Fusarium oxysporum Isolated from the Sludge of Abandoned Mine

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Meteorological and Environmental Research 2022年第5期13卷 91-97页

作者： Chongju WANG Xiaolu YUAN Xuejiao jia jingtao FAN Yue LI Lin MEI Zuolin LIU Yejin Geological Team of Hubei Geological Bureau Huangshi 435003China Hubei Polytechnic University Huangshi 435003China

Owing to exploring the biosorption mechanism of Fusarium oxysporum to Cd,the adsorption capacities of live and dead biomass of *** strain KF2 were *** result showed both the live and dead biomass of strain KF2 could tolerate the Cd concentration up to 200 mg/L,and had the largest adsorption capacities for Cd,at 2.21 and 1.86 mg/g,respectively,with the inoculation amount of 3 g,the pH at 6,and the initial Cd concentration of 100 mg/*** pseudo-second-order kinetic model(live biomass r^(2)>0.99,dead biomass r^(2)>0.90)was more suitable for describing the adsorption process of strain *** indicated that the physicochemical adsorption on the cell surface might be the main pattern for Cd ***,the FTIR results showed that the main functional groups for cell wall to bind Cd were carboxyl,hydroxyl,amino,and phosphate.

关键词： Biosorption Cadimium Fungi Fusarium oxysporum Live and dead biomass Waste water

Future perspectives:advances in bone/cartilage organoid technology and clinical potential

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Biomaterials Translational 2024年第4期5卷 425-443页

作者： jingtao Huang Aikang Li Rongji Liang Xiaohao Wu Shicheng jia jiayou Chen Zilu jiao Canfeng Li Xintao Zhang jianjing Lin Department of Sports Medicine and Rehabilitation Peking University Shenzhen HospitalShenzhenGunagdong ProvinceChina Department of Clinical Medicine Shantou University Medical CollegeShantouGunagdong ProvinceChina Department of Bone&Joint Surgery Peking University Shenzhen HospitalShenzhenGunagdong ProvinceChina Immunology and Rheumatology School of MedicineStanford UniversityPalo AltoCAUSA

Bone and cartilage tissues are essential for movement and structure,yet diseases like osteoarthritis affect *** therapies have limitations,necessitating innovative *** technology,leveraging stem cells’regenerative potential,offers a novel platform for disease modelling and *** review focuses on advancements in bone/cartilage organoid technology,highlighting the role of stem cells,biomaterials,and external factors in organoid *** discuss the implications of these organoids for regenerative medicine,disease research,and personalised treatment strategies,presenting organoids as a promising avenue for enhancing cartilage repair and bone ***/cartilage organoids will play a greater role in the treatment of bone/cartilage diseases in the future,and promote the progress of biological tissue engineering.

关键词： biomaterials bone cartilage organoids stem cells tissue engineering

入口位置及角度对微通道散热器内流体流动与传热的影响

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化工进展 2021年第12期40卷 6423-6431页

作者：贾玉婷姚森王景涛李洪伟东北电力大学能源与动力工程学院吉林吉林132012

为进一步提升等截面微通道热沉的散热性能,本文设计了双进口-单出口型微通道热沉,并采用数值模拟的方法研究了入口上侧边布置、左侧边布置以及不同入口角度时去离子水在微通道热沉内的流动和传热特性。结果表明,进出口布置方式对微散热... 详细信息

为进一步提升等截面微通道热沉的散热性能,本文设计了双进口-单出口型微通道热沉,并采用数值模拟的方法研究了入口上侧边布置、左侧边布置以及不同入口角度时去离子水在微通道热沉内的流动和传热特性。结果表明,进出口布置方式对微散热器内各通道流量分配有很大影响,而流量分配直接影响热沉的温度分布。入口上下侧边布置时流体的分布更加均匀,热沉的热阻和泵功较小。入口角度的减小降低了热沉底面温度,并使底面温度更加均匀。当Re=365时,θ=45°的底面最高温度比θ=90°时降低了1.91℃,但泵功却显著增大。

关键词：微通道数值模拟传热入口位置流量分配

多级斯特林型脉管制冷机中过渡蓄冷器试验优化

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机械工程学报 2022年第8期58卷 244-249页

作者：朱强龙全加刘彦杰梁惊涛中国科学院理化技术研究所空间功热转换技术重点实验室北京100190 中国科学院大学北京100190

多级脉冲管制冷机中的过渡蓄冷器因结构简单,其对整机性能的影响通常被忽略。目前,国内有报道的大多数使用过渡蓄冷器结构的多级脉冲管制冷机均没有对过渡蓄冷器进行系统的研究和优化,但过渡蓄冷器作为多级脉冲管制冷机整机PV功消耗的... 详细信息

多级脉冲管制冷机中的过渡蓄冷器因结构简单,其对整机性能的影响通常被忽略。目前,国内有报道的大多数使用过渡蓄冷器结构的多级脉冲管制冷机均没有对过渡蓄冷器进行系统的研究和优化,但过渡蓄冷器作为多级脉冲管制冷机整机PV功消耗的重要部件之一,其效率的高低直接影响整机性能优劣。分别从过渡蓄冷器回热填料(丝网)填充方式、过渡蓄冷器直径以及长度三个方面对其进行优化研究。结果表明:优化过渡蓄冷器相关参数后,制冷机在20K的制冷量相较优化前提高了19.01%。

关键词：多级斯特林型脉管制冷机过渡蓄冷器

Ni-P-PTFE复合镀层对颗粒污垢沉积特性影响研究

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化工学报 2022年第10期73卷 4594-4602页

作者：王景涛宋凡福徐志明贾玉婷东北电力大学能源与动力工程学院吉林省吉林市132012

为探究Ni-P-PTFE复合镀层对颗粒污垢沉积特性的影响,利用化学镀工艺在碳钢表面制备Ni-P-PTFE复合镀层,以TiO_(2)纳米颗粒为研究对象,通过实验和理论分析的方式研究了不同表面能(PTFE浓度)下Ni-P-PTFE复合镀层在TiO_(2)悬浮液中的颗粒污... 详细信息

为探究Ni-P-PTFE复合镀层对颗粒污垢沉积特性的影响,利用化学镀工艺在碳钢表面制备Ni-P-PTFE复合镀层,以TiO_(2)纳米颗粒为研究对象,通过实验和理论分析的方式研究了不同表面能(PTFE浓度)下Ni-P-PTFE复合镀层在TiO_(2)悬浮液中的颗粒污垢沉积特性。结果表明:相比于碳钢试样,Ni-P-PTFE复合镀层对于TiO_(2)颗粒沉积具有较好的抑制效果。随着PTFE浓度的增加,复合镀层的表面能降低,污垢沉积量呈下降趋势,在表面能为26.8 mJ/m^(2)(PTFE=12 ml/L)时,TiO_(2)颗粒污垢在Ni-P-PTFE复合镀层的沉积量最小。实验结果与应用扩展的DLVO理论计算出的最佳表面能结果相一致,也为针对不同类型颗粒在换热表面的沉积的抑垢提供了指导施镀的依据。

关键词：结垢复合镀层表面能粒子表面