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气送混凝土的流态分析与仿真

机械工程与自动化 2012年第4期 29-31页

作者：贾海深李文英肖文远太原理工大学机械电子工程研究所山西太原030024

运用Fluent对混凝土在输料管中的流态进行仿真。根据混凝土料群在输料管中的压力、速度分布特点、运动轨迹,探究出混凝土料群在输送管道中以"稀薄流"方式输送的最佳输送参数范围,为后续混凝土湿喷机的合理设计、结构优化、性能分析提供... 详细信息

运用Fluent对混凝土在输料管中的流态进行仿真。根据混凝土料群在输料管中的压力、速度分布特点、运动轨迹,探究出混凝土料群在输送管道中以"稀薄流"方式输送的最佳输送参数范围,为后续混凝土湿喷机的合理设计、结构优化、性能分析提供重要的理论依据。

关键词：混凝土稀薄流湿喷机流态分析仿真

地方文献资源开发与高校图书馆文献保障体系研究

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毕节学院学报（综合版） 2011年第2期29卷 87-91页

作者：肖远文黄卫华李文彬毕节学院图书馆贵州毕节551700

当前不少高校图书馆的文献资源建设面临很大的困难与挑战,重构其文献保障体系势在必行。从加强地方文献资源开发的角度,提出了一系列有利于促进高校图书馆文献保障体系建设的建议和措施。

关键词：地方文献高校图书馆文献资源开发文献保障体系

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寒冷地区农村住宅建设研究

建筑技术 2013年第2期44卷 138-140,160页

作者：李志通袁晓文姜波石家庄铁路职业技术学院石家庄050041

寒冷地区农村住宅建设,应结合当地农村具体情况,从构造形式及使用材料控制建筑的外墙、门窗、体型系数、屋面及地面。建议改变宅基地尺寸、研发自保温墙体材料,推广可再生能源利用,实现每个房间独立采暖且可控,以达到节能的目的。

关键词：节能寒冷地区农村住宅体型系数窗墙比夹心保温墙可再生能源

Modular assembly of complex C-alkyl glycoside enabled via cooperative NHC and photoredox catalysis

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Science China Chemistry 2025年

作者： Rui-Qiang Jiao Ming Li Xi Chen Mei-Ze Xu Tian Ding xiao-Ping Gong Zhuo-Mei Li Xue-yuan Liu Yong-Min Liang State Key Laboratory of Applied Organic Chemistry Lanzhou University College of Chemistry and Chemical Engineering Northwest Normal University

C-Alkyl glycosides are found in natural products and are indispensable in drug development programs,owing to their diverse range of medicinal ***-component reactions involving glycosyl radical addition are well documented and proved efficient for the C-alkyl glycosides ***,multicomponent reactions for the rapid and controllable construction of structurally diversified C-alkyl glycosides in a single step remains a significant challenge due to the issues associated with balancing reactivity,compatibility,and ***,we report an NHC and photoredox co-catalyzed three-component method to access complex and valuable C-alkyl *** protocol exhibits broad substrate scope and excellent chemoand ***,nine types of sugars are compatible with this *** addition,the generality of this catalytic strategy was further highlighted by the potential for scalable production,the feasibility of further modifications of the products and its successful application in the late-stage functionalization of pharmaceutical skeletons.

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激光微波双共振导致的基态碱原子的非均衡分布

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物理学报 1987年第4期 436-443页

作者：陈小源朱熙文中国科学院武汉物理研究所

本文求得了激光微波双共振抽运碱原子束时基态原子实现最大非均衡分布的条件,这与新近的实验结果相符。分析了影响非均衡分布的机制,如相干囚禁,指出了消除其影响的途径,与双激光抽运对比,讨论了激光微波双共振抽运过程的特点。

关键词：激光场碱原子抽运过程激光抽运共振抽运非均衡分布双共振微波电磁波

Plate Shape Control Theory and Experiment for 20-high Mill

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Journal of Iron and Steel Research International 2015年第11期22卷 996-1001页

作者： Zheng-wen yuan Hong xiao National Engineering Research Center for Equipment and Technology of Cold Strip Rolling Yanshan University College of Mechanical Engineering Yanshan University

Roll flattening theory is an important part of plate shape control theories for 20-high mill. In order to improve the accuracy of roll flattening calculation for 20-high mill, a new and more accurate roll flattening model was proposed. In this model, the roll barrel was considered as a finite length semi-infinite body. Based on the boundary integral equation method, the numerical solution of the finite length semi-infinite body under the distributed force was obtained and an accurate roll flattening model was established. Coupled with roll bending model and strip plastic deformation, a new and more accurate plate control model for 20-high mill was established. Moreover, the effects of the first intermediate roll taper angle and taper length were analyzed. The tension distribution calculated by analytical model was consistent with the experimental results.

关键词： 20-high mill roll flattening finite length semi-infinite body boundary integral equation method plate shape control

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

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花斑裸鲤卵黄囊期仔鱼的发育观察

西昌学院学报（自然科学版） 2017年第1期31卷 1-3页

作者：董艳珍邓思红肖文渊西昌学院动物科学学院四川西昌615013 凉山科华水生态工程公司四川西昌615000

对花斑裸鲤卵黄囊期仔鱼的发育过程进行观察,结果表明:水温14-16℃,p H6.1-7.1,溶氧6.6-7.6 mg/L的条件下花斑裸鲤刚刚孵化的仔鱼全长8.02-8.31 mm,身体淡黄色,沉于水底,依靠卵黄囊提供能量;孵化后第4天,仔鱼背鳍原基开始分化,身体背部... 详细信息

对花斑裸鲤卵黄囊期仔鱼的发育过程进行观察,结果表明:水温14-16℃,p H6.1-7.1,溶氧6.6-7.6 mg/L的条件下花斑裸鲤刚刚孵化的仔鱼全长8.02-8.31 mm,身体淡黄色,沉于水底,依靠卵黄囊提供能量;孵化后第4天,仔鱼背鳍原基开始分化,身体背部、肌节和卵黄囊之间出现大量点状黑色素斑;孵化后第6天仔鱼开始平游,并开口摄食,全长达到11.93-12.46 mm;第11天卵黄囊基本消失,仔鱼依靠外源性营养进行生长发育,全长达到14.41-15.02 mm。

关键词：花斑裸鲤仔鱼卵黄囊期发育

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有效控制颗粒饲料的粉化率

西昌学院学报（自然科学版） 2007年第3期21卷 37-38页

作者：肖文渊陶正纲张正荣西昌学院动科系四川西昌615013 会东县草原站四川会东615200

通过控制饲料配方、调质、制粒、冷却、分级、包装、堆码、搬运和贮藏等生产使用环节,可有效降低颗粒饲料的粉化率。

关键词：颗粒饲料粉化率颗粒饲料控制