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Micro thermoelectric devices:From principles to innovative applications

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Chinese Physics B 2022年第4期31卷 1-17页

作者： qiulin liu Guodong Li Hangtian Zhu Huaizhou Zhao Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Songshan Lake Materials Laboratory Dongguan 523808China

Thermoelectric devices(TEDs),including thermoelectric generators(TEGs) and thermoelectric coolers(TECs) based on the Seebeck and Peltier effects,respectively,are capable of converting heat directly into electricity and vice *** suffering from low energy conversion efficiency and relatively high capital cost,TEDs have found niche applications,such as the remote power source for spacecraft,solid-state refrigerators,waste heat recycling,and so *** particular,onchip integrable micro thermoelectric devices(μ-TEDs),which can realize local thermal management,on-site temperature sensing,and energy harvesting under minor temperature gradient,could play an important role in biological sensing and cell cultivation,self-powered Internet of Things(IoT),and wearable *** this review,starting from the basic principles of thermoelectric devices,we summarize the most critical parameters for μ-TEDs,design guidelines,and most recent advances in the fabrication *** addition,some innovative applications of μ-TEDs,such as in combination with microfluidics and photonics,are demonstrated in detail.

关键词： thermoelectric microdevices contact impedance local temperature control energy harvesting

High-Pressure Synthesis and Thermal Transport Properties of Polycrystalline BAs_x

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Chinese Physics Letters 2020年第6期37卷 53-56页

作者： Lei Gao qiulin liu Jiawei Yang Yue Wu Zhehong liu Shijun Qin Xubin Ye Shifeng Jin Guodong Li Huaizhou Zhao Youwen Long Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Heavy Oil Processing College of New Energy and MaterialsChina University of PetroleumBeijing 102249China Yangtze River Delta Physics Rearch Center Liyang 213300China Songshan Lake Materials Laboratory Dongguan 523808China

Polycrystalline BAsx(x=0.80-1.10)compounds with different boron-to-arsenic elemental molar ratios were synthesized by a high-pressure and high-temperature sintering *** with other ambient-pressure synthesis methods,high pressure can significantly promote the reaction speed as well as the reaction *** the content of arsenic increases from x=0.91 to 1.10,the thermal conductivity of BAsx gradually increases from 53 to 65 W·m-1·***,the temperature dependence of thermal conductivities of these samples reveals an Umklapp scattering due to the increasing phonon *** work provides a highly efficient method for polycrystalline BAs synthesis.

关键词： synthesis. method. arsenic

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喷射成形技术在铝合金制备中的应用

材料导报 2010年第S2期24卷 213-216+224页

作者：刘丘林刘允中华南理工大学机械与汽车工程学院国家金属材料近净成形工程技术研究中心

介绍了喷射成形技术在超高强铝合金、高比强度和高比模量铝合金、高硅铝合金、低膨胀和耐磨铝合金、耐热铝合金、颗粒增强铝基复合材料制备上的应用。与传统工艺(普通粉末冶金、铸造)相比,喷射成形技术在铝合金的制备上体现了很大的优... 详细信息

介绍了喷射成形技术在超高强铝合金、高比强度和高比模量铝合金、高硅铝合金、低膨胀和耐磨铝合金、耐热铝合金、颗粒增强铝基复合材料制备上的应用。与传统工艺(普通粉末冶金、铸造)相比,喷射成形技术在铝合金的制备上体现了很大的优越性和开发潜力。

关键词：铝合金喷射成形传统工艺

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论高校复合图书馆的用户教育

现代情报 2008年第6期28卷 207-209页

作者：刘秋林湖南文理学院图书馆湖南常德415000

馆藏信息资源多样化、教育对象多元化和社会化、教育手段信息化和网络化对高校复合图书馆的用户教育提出了新的挑战,因此,在复合图书馆环境下,高校图书馆必须采取相应措施,才能不断提高用户教育的水平与效益。

关键词：复合图书馆用户教育高校图书馆

Study on Extraction of Effective Aroma Components from Formula Tobacco by the Supercritical CO2 Extraction Method and Its Aroma Composition

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Agricultural Biotechnology 2020年第5期9卷 117-119页

作者： Shoujie NIE Guangyu MENG Shoutao CAO Shuaicheng TIAN Zhiguang liu Cuishu LENG Guofeng YU qiulin liu Xulun WEI Quanjiang DONG ETSONG(Qingdao)Industrial Co. Ltd.Qingdao 266021China Technology Center of China Tobacco Shandong Industrial Co. Ltd.Jinan 250014China

[Objectives]This study was conducted to improve the sensory quality and industrial availability of tobacco extracts.[Methods]The L9(34)design was adopted to carried out an extraction experiment,in which formula tobacco was extracted using supercritical CO2,and the extract was concentrated by vacuum *** sensory evaluation and chemical analysis,the function determination and chemical composition analysis of the tobacco extracts were carried out,and the optimal supercritical fluid extraction process was finally determined.[Results]The obtained optimal supercritical fluid extraction conditions were as follows:extraction temperature 55℃,extraction pressure 25 MPa,CO2 flow rate of 20 L/h,and entrainer of 95%*** tobacco extract obtained under the optimal conditions endowed the cigarettes with full and delicate aroma,less irritation and clean aftertaste and made the flavor of the cigarettes overall coordinated and softer,so the sensory quality was significantly improved.[Conclusions]The tobacco extract obtained by the supercritical CO2 extraction method from formula tobacco can effectively improve the quality of cigarettes.

关键词： Supercritical extraction method Aroma component Orthogonal test Tobacco Flavor and fragrance

Study on Extraction of Oolong Tea Assisted by Ultrasonic Wave and 4C Technique and Its Application

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Agricultural Biotechnology 2024年第3期13卷 24-27页

作者： Guofeng YU Cuishu LENG Keli FANG Zhiguang liu Jianhong SUN Zengyu Wang Xuegang LI Shuai Zhang Jian liu Xulun WEI qiulin liu Shoujie NIE Technical Center China Tobacco Shandong Industrial Co.Ltd.Qingdao 266101China Yizhong(Qingdao)Industrial Co. Ltd.Qingdao 266021China Purchasing Center China Tobacco Shandong Industrial Co.Ltd.Jinan 250000China

[Objectives]The extraction conditions of formula oolong tea were investigated by an orthogonal experiment.[Methods]The technical conditions were optimized by the 4C method,and the application of formula oolong tea extract in cigarettes was studied.[Results]①In the experimental range,the best sensory evaluation effect of formula oolong tea extract was obtained with extraction conditions of 70%ethanol as extraction solvent,extraction time h,extraction temperature 25℃,and ultrasonic frequency 80 kHz,and follow-up low-temperature concentration,low-temperature sedimentation and low-temperature centrifugation.②The effects of different centrifugal speeds on the quality of formula oolong tea extract were *** formula oolong tea extract obtained under the conditions of 3000 r/min and centrifugal time of 10 min showed the best evaluation effect with soft and delicate smoke,rich smoke fragrance,good comfort and refreshing mouthfeel.③The effective aroma components in the formula oolong tea extract were qualitatively analyzed by GC-MS.[Conclusions]This study provides high-quality raw materials and a theoretical basis for the research of independent flavor blending in cigarette industry enterprises.

关键词： Combined application of ultrasonic wave and 4C technique Orthogonal experiment Formula extraction Flavor

长短周期地震波作用下钢框架结构的响应特性对比分析

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地震工程学报 2022年第4期44卷 768-776页

作者：孙鸿玲胥彬刘秋林西南石油大学土木工程与测绘学院四川成都610500

作为一种特殊的地震动,长周期地震动对结构的危害已引起国内外学者的关注。选取10条KiK-net、K-NET台网中典型的长周期地震动,以及10条国内外的短周期地震动,对比分析两者时程特征和反应谱特征的差异。将所选长、短周期地震动输入钢框... 详细信息

作为一种特殊的地震动,长周期地震动对结构的危害已引起国内外学者的关注。选取10条KiK-net、K-NET台网中典型的长周期地震动,以及10条国内外的短周期地震动,对比分析两者时程特征和反应谱特征的差异。将所选长、短周期地震动输入钢框架结构模型;通过非线性时程分析,研究钢框架结构在长、短周期地震动作用下的响应差异。结果表明:短周期地震动的平均地面峰值加速度是长周期地震动的3.26倍,而平均地面峰值位移比长周期地震动低10.89%;短周期地震动作用下,钢框架结构顶点加速度响应平均值是长周期地震动的5.16倍,结构顶点位移响应平均值仅比长周期地震动多0.91%;长周期地震动作用下,钢框架结构层间位移角响应较大,结构底部受影响范围更广。对于长周期地震动隐患地区的高层钢框架结构,应对长、短周期震害分别进行考虑;对于中、长周期钢框架结构,建议选用峰值位移作为抗震分析指标。

关键词：长周期地震动短周期地震动频谱特征钢框架结构响应特性

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斋堂岛海域波浪能资源的数值模拟研究

水力发电学报 2015年第11期34卷 148-156页

作者：刘秋林张永良梁森栋清华大学水利水电工程系水沙科学与水利水电工程国家重点实验室北京100084

近些年来,波浪能作为新型可再生能源日益受到人们的重视。波浪资源评估对于研发波浪能发电装置、为波浪发电场选址具有至关重要的作用,目前主要通过实地观测和数值模拟两种手段对波浪资源进行评估。本文利用第三代波浪模型对斋堂岛附近... 详细信息

近些年来,波浪能作为新型可再生能源日益受到人们的重视。波浪资源评估对于研发波浪能发电装置、为波浪发电场选址具有至关重要的作用,目前主要通过实地观测和数值模拟两种手段对波浪资源进行评估。本文利用第三代波浪模型对斋堂岛附近海域进行了数值模拟,分析了当地的波浪条件并对蕴藏的波浪能资源进行了初步评估,并对目标位置的波浪资源进行了详细地计算和分析。计算结果表明,斋堂岛海域波浪资源有着显著的季节变化特征,波浪集中分布在东–南方向,最大波能流密度可达25 k W/m,资源相对稳定。

关键词：港口、海岸与近海工程波浪能资源评估数值模拟斋堂岛 SWAN

Optimization of Supercritical Extraction Process of Laoshan Black Tea by Response Surface Methodology

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Agricultural Biotechnology 2023年第1期12卷 98-101页

作者： Yongxin liu Zhiguang liu Zengyu WANG Shuai ZHANG Guofeng YU Jianhong SUN Shoutao CAO qiulin liu Xulun WEI Cuishu LENG Fuhua MA Xuegang LI Yinlong WANG Shoujie NIE Technology Center China Tobacco Shandong Industrial Co.Ltd.Qingdao 266101China Etsong Yizhong(Qingdao)Industrial Co. Ltd.Qingdao 266021China

[Objectives]Laoshan black tea was subjected to supercritical CO_(2) extraction. [Methods]The extraction conditions of Laoshan black tea were studied by an orthogonal experiment and optimized by response surface methodology. [Results] The optimum extraction conditions of black tea extract by supercritical CO_(2) extraction were as follows: extraction pressure 23.53 MPa, extraction time 1.73 h, and extraction temperature 49.75 ℃, with which the extract yield could reach 5.15% theoretically. [Conclusions] Based on the traditional extraction process, a supercritical extraction method optimized by response surface methodology and a unique extraction process were formed, which enriches the extraction processes and methods of natural raw materials.

关键词： Laoshan black tea Supercritical extraction Response surface method