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Correlation between supercooled liquid region and crystallization behavior with alloy composition of La-Al-Cu metallic glasses

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Science China(Physics,Mechanics & Astronomy) 2011年第9期54卷 1608-1611页

作者： zhang qingchao PANG ShuJie LI Yi zhang Tao Key Laboratory of Aerospace Materials and Performance (Ministry of Education) School of Materials Science and Engineering Beijing University of Aeronautics and Astronautics Beijing 100191 China Department of Materials Science and Engineering National University of Singapore Singapore 117576 Singapore

Bulk metallic glasses (BMGs) with large supercooled liquid region are promising materials for superplastic forming. In this paper, we demonstrate a microstructure-based strategy to pinpoint the composition with the largest supercooled liquid region in La 86 x Al 14 Cu x (x=16 at%-20 at%) metallic glass system. By monitoring the changes in crystallization behavior of the glassy alloys with composition to search for the alloys exhibiting eutectic crystallization, the glassy alloys with the largest supercooled liquid region in the given alloy system can be found. The metallic glasses with Cu contents of 16 at%-19 at% exhibited two crystallization peaks, and the primary crystallization product was identified to be α-La by means of DSC, XRD and TEM. The increase in Cu content resulted in the decay of the primary crystallization peak and the increase in onset temperature of crystallization, leading to the enlargement of supercooled liquid region. By further suppressing the α-La primary crystallization with increasing Cu content up to 20 at%, the eutectic crystallization of α-La and LaCu 13 through one crystallization reaction occurred upon heating, where the largest supercooled liquid region of 65 K for La 66 Al 14 Cu 20 glassy alloy was located. This study indicats that, in a given glassy alloy system, a larger supercooled liquid region can be achieved by optimizing the alloy compositions to suppress the primary crystallization.

关键词： bulk metallic glass supercooled liquid region crystallization

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A flexible temperature sensing finger using optical fiber grating for soft robot application

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Optoelectronics Letters 2021年第7期17卷 400-406页

作者： HE Qing zhang qingchao School of Instrument Science and Opto-Electronics Engineering Beijing Information Science and Technology UniversityBeijing 100192China

Bionic perception, especially temperature-aware, is one of the important issues in soft robots research. This paper presents a method to implant temperature sensor network into soft robot finger by using optical fiber gratings. For avoiding strain disturbance, a dedicated metal tube is designed to package and protect the optical fiber gratings. For implanting the sensors firmly, a solution using two kinds of adhesive is proposed. The prototype is calibrated in high precision temperature bath and then measured under different temperatures and different bending conditions, respectively. The experimental results are compared with electronic temperature sensor(PT100 thermal resistance), which verifies the accuracy and repeatability of the design. With the dedicated coating and adhesive solution, the proposed temperature sensor network is suitable for implanting into soft robots for the temperature-aware ability.

关键词： PT100 robot application

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Catalytic methanol decomposition to carbon monoxide and hydrogen over Pd/CeO_2-ZrO_2-La_2O_3 with different Ce/Zr molar ratios

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Journal of Natural Gas Chemistry 2009年第2期18卷 211-216页

作者： Hairong Wang Yaoqiang Chen Qiulin zhang qingchao Zhu Maochu Gong Ming Zhao Key Laboratory of Green Chemistry ＆ Technology of Ministry Education College of Chemistry Sichuan University Chengdu 610064 Sichuan China

Hairong Wang, Yaoqiang Chen, Qiulin zhang, qingchao Zhu, Maochu Gong, Ming Zhao（ Key Laboratory of Green Chemistry ＆ Technology of Ministry Education, College of Chemistry, Sichuan University, Chengdu 610064, Sichua... 详细信息

关键词： methanol decomposition palladium CeO2-ZrO2-La2O3 XPS hydrogen carbon monoxide

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Spatial and temporal variations of zooplankton composition and quantity distribution in the upper waters around Nansha Islands

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Chinese Science Bulletin 2006年第B12期51卷 154-164页

作者： YIN Jianqiang CHEN qingchao zhang Guxian HUANG Liangmin LI Kaizhi LED LAMB and LOB South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China

This study aims to examine spatial and temporal variations of zooplankton species composition,density and biomass distribution and community structure, based on the data obtained from three separate cruises carried out in November 1997, April and July 1999. Results show that 244 species of zooplankton and 8 groups of planktonic larvae were identified, which were dominated by copepods, followed by amphipods, ostracods and medusae. The total species were 201 and 198 for the cruises of November 1997 and July 1999, respectively, and no obvious seasonal variation of species richness was observed. The distribution of zooplankton species richness decreased from pelagic to coastal waters. Average richness of species in each station was higher in the cruises of November 1997(62) and April 1999(61) than in the cruise in July 1999 (56), which was mainly a result from the pelagic or coastal water mass movement made by the monsoon. Zooplankton in the upper waters (0―100 m) around Nansha Islands belonged to the typical tropic pelagic fauna, most of them were pelagic warm-water species, followed by coastal warm-water species and euryhaline warm-water species. The number of dominant species ranged from 5 to 7 in each cruise. No obvious seasonal succession of dominant species was observed. Sagitta enflata, Cypridina nami, Cosmocalanus darwinii, Pleuromamma gracilis and Echinopluteus larva were the main dominant species. The average of zooplankton biomass and density in three cruises were 31, 32, 28 mg·m 3 and 31, 39, 35 ind·m 3, respectively. Copepods were the most abundant, followed by chaetognaths. Zooplankton high biomass distributed mainly in the northwestern waters around Nansha Islands, and generally occurred in the areas of oceanic front and upwelling. The main reason for zooplankton quantity without obvious seasonal variation was the relative steady temperature dynamics in the waters around Nansha Islands.

关键词：南沙群岛海洋生态浮游动物物种组成定量分布时空变异种群结构

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Lactobacillus melliventris promotes hive productivity and immune functionality in Bombus terrestris performance in the greenhouse

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Insect Science 2024年第3期31卷 911-926页

作者： Qianhui Yu Yan Liu Shanshan Liu Shaogang Li Yifan Zhai qingchao zhang Li Zheng Hao Zheng Yifan Zhai Xiaofei Wang Insttute of Plant Protection Shandong Academy of Agricultural SciencesJinanChina Key Laboratory of Natural Enemies Insects Ministry of Agriculture and Rural AffairsJinanChina College of Food Science and Nutritional Engineering China Agricultural UniversityBeijingChina BGI-Qingdao BGI-ShenzhenQingdaoShandongChina

Bumblebees are important pollinators in agricultural ecosystems,but their abundance is declining *** is an urgent need to protect bumblebee health and their pollination *** possess specialized gut microbiota with potential to be used as probiotics to help defend at-risk bumblebee ***,evidence for probiotic benefits on bumblebees is ***,we evaluated how supplementation with Lactobacillus melliventris isolated from bumblebee gut affected the colony development of Bombus *** native strain colonized robustly and persisted long-term in bumblebees,leading to a significantly higher quality of ***,the tyrosine pathway was upregulated in the brain and fat body,while the Wnt and mTOR pathways of the gut were ***,the field experiment in the greenhouse revealed the supplementation of *** led to a 2.5-fold increase in the bumblebee survival rate and a more than 10%increase in the number of flowers visited,indicating a better health condition and pollination ability in field *** study represents a first screening for the potential use of the native gut member,***,as probiotic strains in hive supplement for bumblebee breeding,which may be a practical approach to improve immunity and hive health.

关键词： Bombus terrestris gut microbiota immunity Lactobacillus melliventris transcriptome

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Study on Traditional Furniture Design Using Emotionalism Theory

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International Journal of Technology Management 2015年第3期 1-3页

作者： Qu Zhenbo zhang qingchao Shandong Jianzhu university Art college 250061 JiNan

In face to the phenomenon of program, indifference and lack of emotion in furniture design. In this paper, through the analysis of various factors that trigger users＇ emotional experience, research the specific point of the emotional design classification. According to the furniture design propose the traditional furniture design creative model and design method for the modem life. From the perspective of the specific case, gives the detailed process of modem furniture design and implementation methods, for obtain the results of outstanding design put forward specific ways.

关键词： emotional design traditional furniture design design method emotional experience

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瞬变电磁法隧道超前地质预报物理模拟

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现代隧道技术 2019年第6期56卷 47-51,62页

作者：秦良张庆朝中国兵器工业北方勘察设计研究院有限公司石家庄050011 河北工程大学地球科学与工程学院邯郸056038

文章根据物理模拟相似性准则设计模型试验,采用水槽、盐水、塑料槽、铜板和铁块分别模拟围岩全空间、均匀介质、隧道空间、异常体和金属干扰体,重点研究隧道空间、金属干扰体及异常体自身对瞬变电磁法隧道超前地质预报结果的影响规律。... 详细信息

文章根据物理模拟相似性准则设计模型试验,采用水槽、盐水、塑料槽、铜板和铁块分别模拟围岩全空间、均匀介质、隧道空间、异常体和金属干扰体,重点研究隧道空间、金属干扰体及异常体自身对瞬变电磁法隧道超前地质预报结果的影响规律。试验结果表明:隧道空间只会对二次电磁响应值大小产生微弱影响,对二次电磁响应的衰减速度几乎无影响;金属干扰体的存在会严重影响探测结果,导致感应电动势增大,造成存在低阻异常体的假象;在对不同位置异常体的物理模拟试验中,感应电动势大小随着异常体与探测线圈距离的増加而呈指数衰减的规律。试验结果验证了瞬变电磁法用于隧道超前地质预报的可行性,为改进资料解释方法、提高探测精度提供了重要依据。

关键词：隧道超前地质预报瞬变电磁法隧道空间金属干扰体异常体物理模拟

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一种改进的电压暂降检测方法

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电工技术学报 2006年第2期21卷 123-126页

作者：张庆超肖玉龙天津大学电气与自动化工程学院天津300072

电压暂降是最严重的电能质量问题之一,补偿电压暂降能够带来巨大的经济效益,而实现电压暂降特征量的快速、准确检测是电压暂降补偿的前提。本文对现有的电压暂降特征量检测方法进行了全面的研究后,提出一种改进的电压暂降检测方法。该... 详细信息

电压暂降是最严重的电能质量问题之一,补偿电压暂降能够带来巨大的经济效益,而实现电压暂降特征量的快速、准确检测是电压暂降补偿的前提。本文对现有的电压暂降特征量检测方法进行了全面的研究后,提出一种改进的电压暂降检测方法。该方法利用求导来代替αβ变换方法中的相位延迟算法,不但克服了αβ变换方法中相位延迟算法所造成的短时扰动现象,提高了检测精度,而且还明显加快了检测速度,提高了算法的实时性,从而实现了电压暂降特征量的快速、准确检测。仿真结果证明了该方法的有效性,有望用于DVR补偿装置。

关键词：电压暂降 αβ变换相位延迟动态电压恢复器

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Avian influenza viruses suppress innate immunity by inducingtrans-transcriptional readthrough via SSU72

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Cellular & Molecular Immunology 2022年第6期19卷 702-714页

作者： Yan Zhao Fengming Huang Zhen Zou Yuhai Bi Yang Yang Cong zhang Qiang Liu Daozhen Shang Yiwu Yan Xiangwu Ju Song Mei Peng Xie Xiao Li Mingyao Tian Shuguang Tan Huijun Lu Zongsheng Han Kangtai Liu Yuqing zhang Junbo Liang Zhu Liang qingchao zhang Jiahui Chang William JLiu Cong Feng Tanshi Li Michael Q.zhang Xiaoyue Wang George FGao Yingxia Liu Ningyi Jin Chengyu Jiang State Key Laboratory of Medical Molecular Biology Institute of Basic Medical SciencesChinese Academy of Medical SciencesDepartment of BiochemistryPeking Union Medical CollegeBeijing 100005China Shenzhen Key Laboratory of Pathogen and Immunity State Key Discipline of Infectious DiseaseSecond Hospital Affiliated with Southern University of Science and TechnologyShenzhen Third People’s HospitalShenzhenGuangdong 518112China CAS Key Laboratory of Pathogenic Microbiology and Immunology Institute of MicrobiologyCenter for Influenza Research and Early-warning(CASCIRE)CAS-TWAS Center of Excellence for Emerging Infectious Diseases(CEEID)Chinese Academy of SciencesBeijing 100101China School of Life Science University of Science and Technology of ChinaHefeiAnhui 230027China Department of Automation Tsinghua UniversityBeijing 100084China Genetic Engineering Laboratory Institute of Military VeterinaryAcademy of Military Medical SciencesChangchunJilin 130062China State Key Laboratory of Biotherapy/Collaborative Innovation Center for Biotherapy West China HospitalSichuan UniversityChengduSichuan 610000China State Key Laboratory of Medical Molecular Biology Department of Biochemistry and Center for BioinformaticsInstitute of Basic Medical SciencesChinese Academy of Medical SciencesSchool of Basic MedicinePeking Union Medical CollegeBeijing 100005China National Institute for Viral Disease Control and Prevention Chinese Centers for Disease Control and PreventionBeijing 102206China Department of Emergency General Hospital of the PLAHaidian DistrictBeijing 100853China Department of Biological Sciences and Center for Systems Biology The University of Texas at DallasRichardsonTXUSA

Innate immunity plays critical antiviral roles. The highly virulent avian influenza viruses (AIVs) H5N1, H7N9, and H5N6 can betterescape host innate immune responses than the less virulent seasonal H1N1 virus. Here, we report a mechanism by whichtranscriptional readthrough (TRT)-mediated suppression of innate immunity occurs post AIV infection. By using cell lines, mouselungs, and patient PBMCs, we showed that genes on the complementary strand (“trans” genes) influenced by TRT were involved inthe disruption of host antiviral responses during AIV infection. The trans-TRT enhanced viral lethality, and TRT abolishmentincreased cell viability and STAT1/2 expression. The viral NS1 protein directly bound to SSU72, and degradation of SSU72 inducedTRT. SSU72 overexpression reduced TRT and alleviated mouse lung injury. Our results suggest that AIVs infection induce TRT byreducing SSU72 expression, thereby impairing host immune responses, a molecular mechanism acting through the NS1-SSU72-trans-TRT-STAT1/2 axis. Thus, restoration of SSU72 expression might be a potential strategy for preventing AIV pandemics.

关键词： AIV infection TRT SSU72 NS1 Immune escape

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基于微扰法的不换位输电线路相模变换

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电力系统保护与控制 2017年第10期45卷 18-23页

作者：张庆超易乐钊天津大学电气与自动化工程学院天津300072

传统的对称分量法适用于理想换位的三相对称输电线路,对于不对称程度较大的不换位单回输电线路,其结果误差较大。为获得更精确的结果,采用模分量法,该方法的关键是求解相模变换矩阵。考虑了架空地线对不换位线路阻抗矩阵的影响,并运用... 详细信息

传统的对称分量法适用于理想换位的三相对称输电线路,对于不对称程度较大的不换位单回输电线路,其结果误差较大。为获得更精确的结果,采用模分量法,该方法的关键是求解相模变换矩阵。考虑了架空地线对不换位线路阻抗矩阵的影响,并运用微扰理论,通过构造因不换位造成的阻抗矩阵微扰量,可以求解出不同精度的相模变换矩阵。将求得的变换矩阵用于模分量理论进行故障分析,所得的计算结果与实际结果相比误差很小,验证了该方法的可行性。

关键词：不换位输电线路相模变换模分量法微扰法故障测距

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