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火车运输洗精煤亏吨分类及其原因分析

山东煤炭科技 2015年第1期33卷 189-190页

作者：杨凤华闫均旭陈亮枣矿集团地质测量处山东枣庄277000 枣矿集团田陈煤矿煤质办山东滕州277523 枣矿集团环保节能中心山东枣庄277000

在煤炭贸易中,出卖方和买受方都会对发售和接收的煤炭进行检斤计量。当双方的质量、计量检测数据之间存在差异时,就会产生争议,该文通过分析亏吨原因,减少纠纷发生。

关键词：火车精煤亏吨

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奥氏体-贝氏体球墨铸铁的组织和性能

金属热处理 1988年第9期 22-31页

作者：阎秉钧李古哉胡世骏阎汝煦肖亚伟黄建宇晏国洪甘肃工业大学兰州通用机器厂兰州大学

本文用正交试验选择出热处理参数,考察了不同等温淬火温度和时间对奥氏体-贝氏体球铁组织和性能的影响,并进行了延性断裂韧度与接触疲劳性能的试验。实验结果表明,奥氏体-贝氏体球铁具有良好的断裂韧性和接触疲劳强度。文中探讨了奥氏体... 详细信息

本文用正交试验选择出热处理参数,考察了不同等温淬火温度和时间对奥氏体-贝氏体球铁组织和性能的影响,并进行了延性断裂韧度与接触疲劳性能的试验。实验结果表明,奥氏体-贝氏体球铁具有良好的断裂韧性和接触疲劳强度。文中探讨了奥氏体-贝氏体球铁性能优异的原因。

关键词：奥氏体 γ固溶体金相相组成球铁贝氏体贝茵体等温时间等温温度

Editorial for special issue on metallurgical process engineering and intelligent manufacturing

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International Journal of Minerals,Metallurgy and Materials 2021年第8期28卷 1249-1252页

作者： An-jun xu yan-ping Bao School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

In recent years, new concepts and new technologies for improving the manufacturing level have emerged one after another, and the global industrial competition pattern will undergo major adjustments. The United States proposed the"Advanced Manufacturing Country" strategy, France proposed the "New Industry France Plan," and Germany proposed "Industry 4.0." At the same time.

关键词： intelligent pattern emerged

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无线多节点图像采集系统实现及应用

计算机科学 2011年第B10期38卷 451-453页

作者：仇乐乐胡艳军许耀华姜新红高韦卫海燕安徽大学计算智能与信号处理教育部重点实验室合肥230039

首先介绍了无线传感器网络和移动通信网结合的组网策略。然后详细介绍了太阳能电板供电节点的硬件设计,以及上位机的软件设计。最后在室内和室外环境下,对整个系统进行了测试。测试结果表明网络中的设备能够快速收敛形成低成本、易扩展... 详细信息

首先介绍了无线传感器网络和移动通信网结合的组网策略。然后详细介绍了太阳能电板供电节点的硬件设计,以及上位机的软件设计。最后在室内和室外环境下,对整个系统进行了测试。测试结果表明网络中的设备能够快速收敛形成低成本、易扩展、易控制的传感器网络,并且在室内和室外环境下,上位机软件都能重建清晰的图像。

关键词：无线传感器网络多节点图像传输 ZigBee GPRS ADO

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块型建材氡射气系数快速测量的初步研究

中国辐射卫生 2016年第6期25卷 720-723,729页

作者：邓君王拓宋延超刘晓惠翟贺争王燕君苏旭中国疾病预防控制中心辐射防护与核安全医学所北京100088 中国医学科学院放射医学研究所

目的初步研究并建立块型建材中氡射气系数的快速测量方法。方法本工作以块型加气混凝土为研究对象,建立氡射气输运理论模型、采用测氡仪和密闭装置测量累积氡浓度、计算氡射气系数,并与标准测量方法进行比对。结果该方法与标准方法的测... 详细信息

目的初步研究并建立块型建材中氡射气系数的快速测量方法。方法本工作以块型加气混凝土为研究对象,建立氡射气输运理论模型、采用测氡仪和密闭装置测量累积氡浓度、计算氡射气系数,并与标准测量方法进行比对。结果该方法与标准方法的测量结果无显著性差异,表明了较高的可靠性。结论研究建立的快速测量方法可较大缩短测量时间,利于建材氡放射性危害的评价,是其放射性危害防控体系的有益补充。

关键词：块型加气混凝土氡射气系数快速测量

Characteristics of clusters in the jet influence zone of riser

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Particuology 2021年第2期19卷 118-127页

作者： Zihan yan Yiping Fan jun xu Chunxi Lu Chunming xu State Key Laboratory of Heavy Oil Processing College of Chemical Engineering and EnvironmentChina University of Petroleum-BeijingBeijing 102249China

By analyzing solid holdup signals in the jet influence zone of risers,the characteristics of clusters were *** solid holdups inside clusters and their distribution ranges were calculated under the cases of both upward and downward feed ***,the effects of the jet velocity on the cluster characteristics were *** solid holdups inside clusters have higher values and wider distribution ranges in the upward feed injection zone than in the downward zone,implying that the number of individual particles in a cluster is unstable under the influence of upward *** the case of downward jets,cluster formations in the jet influence zone of risers can more easily maintain stability,offering a better mixing environment for jets and *** the jet velocity increases,the solid holdups inside clusters in the riser wall of the upward injection zone increase accordingly,while the distributions of solid holdups inside clusters have no significant changes if the feed jets are *** phenomenon confirms that improved operational flexibility can be obtained if downward jets are mixed with the prelift gas-solid flow in risers.

关键词： Riser Cluster Jet Solid holdup

Research progress based on observations of the New Vacuum Solar Telescope

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Science China(Technological Sciences) 2020年第9期63卷 1656-1674页

作者： yan XiaoLi LIU Zhong ZHANG jun xu Zhi Yunnan Observatories Chinese Academy of SciencesKunming 650216China Center for Astronomical Mega-Science Chinese Academy of SciencesBeijing 100012China Key Laboratory of Solar Activity National Astronomical Observatories Chinese Academy of SciencesBeijing 100012China

The purpose of this paper is to introduce the main scientific results made by the one-meter New Vacuum Solar Telescope(NVST),which was put into commission on 2010. NVST is one of the large aperture solar telescopes in the world, located on the shore of Fuxian lake of Yunnan province in China, aiming at serving solar physicists by providing them with high resolution photospheric and chromospheric observational data. Based on the data from NVST and complementary observations from space(e.g.,Hinode, SDO and IRIS, etc), dozens of scientific papers have been published with a wide range of topics concentrating mainly on dynamics and activities of fine-scale magnetic structures and their roles in the eruptions of active-region filaments and *** achievements include dynamic characteristics of photospheric bright points, umbral dots, penumbral waves, and sunspot/light bridge oscillation, observational evidence of small-scale magnetic reconnection, and fine-scale dynamic structure of *** these new results will shed light on the better understanding of solar eruptive activities. Data release, observation proposals,and future research subjects are introduced and discussed.

关键词： sunspots solar flares solar filaments/prominences jets Ellerman bombs magnetic reconnection

Based on non-targeted metabolomics for differential components screening of Rosae Chinensis Flos and Rosae Rugosae Flos and their quality evaluation

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Traditional Medicine Research 2025年第2期10卷 1-15页

作者： xu Liang Ni-Hui Zhang Zhi-Lai Zhan Guang-Lu Chang yan Gao Xia Li Wen-Yuan Gao School of Pharmaceutical Science and Technology Faculty of MedicineTianjin UniversityTianjin 300193China State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs China Academy of Chinese Medical SciencesBeijing 100700China Key Laboratory of Modern Chinese Medicine Resources Research Enterprises Tianjin 300402China

Background:Rosa chinensis *** Rosa rugosa *** not only of ornamental value,but also edible flowers and the flower buds have been listed in the Chinese Pharmacopoeia as traditional *** two plants have some differences in efficacy,but the flower buds are easily confused for similar *** addition,large-scale cultivation of ornamental rose flowers may lead to a decrease in the effective components of medicinal ***,it is necessary to study the chemical composition and make quality evaluation of Rosae Chinensis Flos(Yueji)and Rosae Rugosae Flos(Meigui).Methods:In this study,40 batches of samples including Meigui and Yueji from different regions in China were collected to establish high-performance liquid chromatography ***,the fingerprints data was analyzed using principal component analysis,hierarchical cluster analysis,and partial least squares discriminant analysis analysis chemometrics to obtain information on intergroup differences,and non-targeted metabolomic techniques were applied to identify and compare chemical compositions of samples which were chosen from groups with large *** compounds were screened by orthogonal partial least-squares discriminant analysis and S-plot,and finally multi-component quantification was performed to comprehensively evaluate the quality of Yueji and ***:The similarity between the fingerprints of 40 batches roses and the reference print R was 0.73 to 0.93,indicating that there were similarities and differences between the *** principal component analysis and hierarchical cluster analysis of fingerprints data,the samples from different origins and varieties were intuitively divided into four *** least-squares discriminant analysis analysis showed that Meigui and Yueji cluster into two categories and the model was reliable.A total of 89 compounds were identified by high resolution mass spectrometry,mainly were flavonoids and flavon

关键词： Rosa chinensis Jacq. Rosa rugosa Thunb. metabolomics chemometrics multiple component quantification quality evaluation

来源于豆豉的纳豆激酶基因在大肠杆菌中活性表达研究

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中国生化药物杂志 2004年第5期25卷 284-287页

作者：杨艳燕李洁石衍君袁琳许芳湖北大学生命科学学院湖北武汉430062

目的构建大肠杆菌表达质粒pTYB10 2 ,实现纳豆激酶基因 (nattokinasegene)在大肠杆菌中高活性表达。方法以纳豆芽孢杆菌基因组DNA为模板 ,采用PCR方法分别扩增编码前肽、成熟肽的序列 (pro NK) ,构建大肠杆菌表达质粒pTYB10 2 ,转化大... 详细信息

目的构建大肠杆菌表达质粒pTYB10 2 ,实现纳豆激酶基因 (nattokinasegene)在大肠杆菌中高活性表达。方法以纳豆芽孢杆菌基因组DNA为模板 ,采用PCR方法分别扩增编码前肽、成熟肽的序列 (pro NK) ,构建大肠杆菌表达质粒pTYB10 2 ,转化大肠杆菌ER2 5 6 6。在IPTG诱导下 ,分别在 37℃ (2h)、30℃ (3h)和 15℃ (14h)培养。结果pTYB10 2能表达有活性的纳豆激酶。SDS PAGE表明 ,15℃表达杂蛋白质更少。结论证明具有 77个氨基酸序列的前肽 (pro序列 )对纳豆激酶的活性表达是必不可少的。

关键词：纳豆激酶基因大肠杆菌表达质粒活性表达