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Investigation of non-uniform leading-edge tubercles in compressor cascade:Based on multi-objective optimization and data mining

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Chinese Journal of Aeronautics 2024年第7期37卷 134-152页

作者： Jiezhong DONG Wuli CHU Haoguang zhang Bo LUO tianyuan JI Ziyun zhang School of Power and Energy Northwestern Polytechnical UniversityXi’an 710129China

Corner stall receives noticeable attention in the aeroengine field as an important phenomenon in highly-load ***-uniform leading-edge tubercles,as an effective method to delay stall,are introduced into the *** this paper,the shape of leading-edge tubercles was controlled by a third-order Fourier *** judge corner stall,a more precise stall indicator for compressor cascade with flow control methods was ***,the total kinetic energy of the secondary flow at large incidence was adopted as a parameter for stall evaluation to save computing *** results of multiobjective optimization reveal that the loss coefficient exhibited negligible variation at design incidence,while the total kinetic energy of secondary flow showed a significant reduction at large incidence,resulting in a substantial increase in stall *** the optimal profiling cases,the stall incidencewas delayed from 7.9°to 11.6°.The major purpose of the research is to provide proper design guidelines for nonuniformleading-edge tubercles and uncover the flow controlmechanisms of leading-edge ***,the geometric features that meet different optimization objectives were extracted through geometric analysis near the Pareto Front and through Self-OrganizingMap(SOM)dataminingmethods in the optimization ***,flow field analysis reveals the flow control mechanism of leading-edge *** convex-concave-convex structure at the 0%-70%blade height region can form two branches of leading-edge vortex pairs that are opposite in the rotation direction to the passage *** two branches of leading-edge vortex pairs mixed with the leading-edge separation vortex to form two stronger mixed vortices,which can effectively suppress the development of passage vortex and delay stall incidence.

关键词： Corner stall Non-uniform leading-edge tubercles Stall indicator Stall evaluation parameter Mixed vortex

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槲寄生药材亲缘关系的RAPD分析

分子植物育种 2019年第1期17卷 175-180页

作者：龙猜宾文李艳梅郭佳鑫张天园于治国赵云丽沈阳药科大学药学院沈阳110016 沈阳药科大学生命科学与生物制药学院沈阳110016

本研究以半寄生性药材-槲寄生为研究对象,利用RAPD分子标记技术,以生长环境和寄主植物为要素,旨在探讨这两个因素对槲寄生药材亲缘关系的影响。研究表明:10个RAPD引物在15个槲寄生样本中共扩增出190条带,其中多态性带143条,多态性比率高... 详细信息

本研究以半寄生性药材-槲寄生为研究对象,利用RAPD分子标记技术,以生长环境和寄主植物为要素,旨在探讨这两个因素对槲寄生药材亲缘关系的影响。研究表明:10个RAPD引物在15个槲寄生样本中共扩增出190条带,其中多态性带143条,多态性比率高达75.26%。采用NTSYSpc软件的UPGMA法构建聚类系统树型图,当相似性系数为0.657时,以产地为基础,可以将15个槲寄生样本分为3类。槲寄生样本间的遗传多样性有显著差异:来自河北和黑龙江的槲寄生亲缘关系较近,辽宁地区的槲寄生样本与河北及黑龙江的槲寄生相似性小,亲缘关系相对较远;而来源于不同寄主种属的槲寄生亲缘关系错综复杂,对聚类系谱的划分影响较小。分析结果表明,不同槲寄生药材通过RAPD方法聚类谱系,未能与其寄主种属形成对应关系,但很可能与其生长的地域之间存在一定联系。这为进一步研究槲寄生药材与寄主和产地间的复杂关系提供了更有利的现代研究手段和理论参考。

关键词：槲寄生 RAPD 聚类分析亲缘关系

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《伤寒论》中六经病与温病卫气分证关系探讨

中医学报 2023年第11期38卷 2330-2333页

作者：李遨宇崔书克张天元谢刘刚张菁瑞河南中医药大学河南郑州450046

《伤寒论》中“伤寒”一词为广义伤寒,包括了后世温病学家所论述的温病。叶天士卫气营血辨证中,卫分证、气分证可在《伤寒论》六经病中找到端倪。卫分证治以辛凉解表,此可体现于麻杏甘石汤、大青龙汤、越婢汤等之中;气分证治以开泄法、... 详细信息

《伤寒论》中“伤寒”一词为广义伤寒,包括了后世温病学家所论述的温病。叶天士卫气营血辨证中,卫分证、气分证可在《伤寒论》六经病中找到端倪。卫分证治以辛凉解表,此可体现于麻杏甘石汤、大青龙汤、越婢汤等之中;气分证治以开泄法、苦泄法、温阳法等,其中开泄法可见于栀子豉汤,苦泄法可见于小陷胸汤、泻心汤类方,温阳法可见于五苓散、苓桂术甘汤等。因此,卫分证、气分证症状、病机、治法可统一于《伤寒论》六经病之中。

关键词：六经病伤寒温病卫分证气分证卫气营血辨证《伤寒论》

利用卷式膜分离器分离有机蒸气/氮气混合气的过程研究

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膜科学与技术 1999年第4期19卷 48-51页

作者：李晖张天元刘富强孙锡钧田福聚曹义鸣中国科学院大连化学物理研究所大连116023

利用硅橡胶（ＬＴＶ）／聚醚酰亚胺（ＰＥＩ）复合膜做成的卷式膜分离器，进行了有机蒸气（ＶＯＣ）／氮气混合气分离过程的研究，主要考察了原料气的处理量、浓度、压力以及渗透侧真空度对有机蒸气脱除率的影响．实验结... 详细信息

利用硅橡胶（ＬＴＶ）／聚醚酰亚胺（ＰＥＩ）复合膜做成的卷式膜分离器，进行了有机蒸气（ＶＯＣ）／氮气混合气分离过程的研究，主要考察了原料气的处理量、浓度、压力以及渗透侧真空度对有机蒸气脱除率的影响．实验结果表明，当压力为０．６ＭＰａ，处理量为１．０３ｍ３／ｈ，渗透侧真空度为０．０２ＭＰａ时，有机蒸气的脱除率达到９０％以上；提高原料气侧的压力以及在渗透侧抽真空。

关键词：有机蒸气膜分离分离器混合气氮气

Two-Dimensional Metal-Halide Perovskite-based Optoelectronics: Synthesis, Structure, Properties and Applications

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Energy & Environmental Materials 2021年第1期4卷 46-64页

作者： Hongda Li tianyuan Luo Shoufeng zhang Zijun Sun Xiong He Wenfeng zhang Haixin Chang Center for Materials Science and Engineering School of Mechanical and Transportation EngineeringGuangxi University of Science and TechnologyLiuzhou 545006China Quantum-Nano Matter and Device Lab State Key Laboratory of Material Processing and Die&Mould TechnologySchool of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China

In the past decade, metal-halide perovskites have attracted increasing attention in optoelectronics, due to their superior optoelectronic ***, inherent instabilities of conventional three-dimensional(3D)perovskites over moisture, heat, and light remain a severe challenge before the realization of commercial application of metal-halide ***, when the dimensions of metal-halide perovskites are reduced to two dimensions(2D), many of the novel properties will arise, such as enlarged bandgap, high photoluminescence quantum yield, and large exciton binding energy. As a result, 2D metal-halide perovskite-based optoelectronic devices display excellent performance, particularly as ambient stable solar cells with excellent power conversion efficiency(PCE), high-performance light-emitting diodes(LEDs) with sharp emission peak, and high-sensitive photodetectors. In this review, we first introduce the synthesis, structure,and physical properties of 2D perovskites. Then, the 2D perovskite-based solar cells, LEDs, and photodetectors are discussed. Finally, a brief overview of the opportunities and challenges for 2D perovskite optoelectronics is presented.

关键词： applications metal-halide perovskites optoelectronics two-dimensional

Data fusion and simulation-based planning and control in cyber physical system for digital assembly of aeroplane

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International Journal of Modeling, Simulation, and Scientific Computing 2015年第3期6卷 66-84页

作者： Hui Li Linxuan zhang tianyuan Xiao Jietao Dong State CIMS Engineering Research Center at Tsinghua University Main Building Room 604 Beijing 100084P.R.China State CIMS Engineering Research Center at Tsinghua University Main Building Room 601 Beijing 100084P.R.China State CIMS Engineering Research Center at Tsinghua University Main Building Room 619 Beijing 100084P.R.China

This paper introduces a CPS application for intelligent aeroplane *** first,the CPS structure is presented,which acquires the characteristics of general CPS and enables“simulation-based planning and control”to achieve high level intelligent *** the paper puts forward data fusion estimation algorithm under synchronous and asynchronous sampling,*** experiment shows that global optimal distributed fusion estimation under synchronized sampling proves to be closer to the actual value compared with ordinary weighted estimation,and multi-scale distributed fusion estimation algorithm of wavelet under asynchronous sampling does not need time registration,it can also directly link to data,and the error is *** paper presents hybrid control strategy under the circumstance of joint action of the inner and outer loop to address the problems caused by the less controllable feature of the parallel mechanism when undertaking online process simulation and control.A robust adaptive sliding mode controller is designed based on disturbance observer to restrain inner interference and maintain *** the same time,an outer collaborative trajectory planning is also *** the experiment results show the feasibility of above proposed methods.

关键词： Intelligent aeroplane assembly cyber physical system multi-sensor data fusion simulation-based control disturbance observer robust adaptive sliding mode controller

不同添加剂处理样本对高效液相色谱法测定血氯氮平及其代谢产物浓度的影响

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检验医学 2009年第11期24卷 799-803页

作者：郭新胜王冀康师天元姜锋张红亚新乡医学院第二附属医院中心实验室河南新乡453002

目的探讨使用肝素钠抗凝剂、促凝剂、分离胶等添加剂处理的样本是否适合使用高效液相色谱（HPLC）法监测氯氮平（CZP）及其代谢产物去甲氯氮平（N-CZP）浓度。方法选择临床服用CZP治疗达稳态的住院患者,使用真空采血系统分别采集普通管... 详细信息

目的探讨使用肝素钠抗凝剂、促凝剂、分离胶等添加剂处理的样本是否适合使用高效液相色谱（HPLC）法监测氯氮平（CZP）及其代谢产物去甲氯氮平（N-CZP）浓度。方法选择临床服用CZP治疗达稳态的住院患者,使用真空采血系统分别采集普通管血液样本和含有肝素钠抗凝剂、促凝剂、分离胶等添加剂的样本,在HP-1100 HPLC仪上测定CZP、N-CZP浓度,比较结果的差异。结果不同方式处理的样本间CZP、N-CZP浓度差异有统计学意义（P均〈0.001）。其中普通管血清、肝素钠抗凝血浆、促凝剂处理的血清之间CZP、N-CZP浓度均无差异（P〉0.05）;分离胶处理的样本与普通管血清、促凝剂和肝素钠抗凝剂处理的样本之间CZP、N-CZP浓度差异均有统计学意义（P〈0.01~0.001）。在不分离凝块情况下,4℃和室温放置24 h后,分离胶处理的样本CZP、N-CZP浓度均低于放置前（P〈0.05）,其他方式处理的样本结果差异无统计学意义（P〉0.05）。分离血清4℃放置24 h后,分离胶处理的样本CZP浓度低于放置前（P〈0.05）,而N-CZP浓度升高（P〈0.05）;促凝剂处理的样本CZP、N-CZP浓度均降低（P〈0.05）;其他方式处理的样本差异无统计学意义（P〉0.05）。结论促凝剂和肝素钠处理样本适用于CZP、N-CZP的快速测定,但使用促凝剂处理的样本,最好能及时测定,不能及时测定的应在不分离血凝块的条件下保存;分离胶处理的样本不适合使用HPLC法测定CZP、N-CZP浓度,也不适于储存和运输样本。

关键词：氯氮平去甲氯氮平添加剂肝素促凝剂分离胶高效液相色谱

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虎杖苷抗氧化活性研究进展

天津中医药大学学报 2024年第4期43卷 333-340页

作者：靳亚静党玲玲陈希瑜张田圆王彧邵瑞天津中医药大学中西医结合学院天津301617 组分中药国家重点实验室天津301617 天津中医药大学中医药研究院天津301617

虎杖苷是从中药虎杖的干燥根茎中提取的单体化合物,是白藜芦醇的葡糖苷衍生物。现代药理学研究发现,虎杖苷在许多生物过程中发挥重要作用,包括氧化应激、炎症和细胞凋亡等。与白藜芦醇相比,虎杖苷因具有更高的抗氧化活性和生物利用度受... 详细信息

虎杖苷是从中药虎杖的干燥根茎中提取的单体化合物,是白藜芦醇的葡糖苷衍生物。现代药理学研究发现,虎杖苷在许多生物过程中发挥重要作用,包括氧化应激、炎症和细胞凋亡等。与白藜芦醇相比,虎杖苷因具有更高的抗氧化活性和生物利用度受到广泛关注。近年来研究发现虎杖苷可以显著改善多种氧化应激相关疾病,如神经退行性疾病、糖尿病、心血管相关疾病等。文章就虎杖苷在多种临床常见疾病中的抗氧化作用进行综述,以期为虎杖苷的后续研究及开发利用提供参考。

关键词：虎杖虎杖苷抗氧化应用作用机制

A dynamic delivery strategy for material handling in mixed-model assembly lines using decentralized supermarkets

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International Journal of Modeling, Simulation, and Scientific Computing 2015年第4期6卷 73-91页

作者： Jietao Dong Linxuan zhang tianyuan Xiao Hui Li National CIMS Engineering Research Center Tsinghua University Beijing 100084 P.R.China

Material handling has become one of the major challenges in modern production ***,this paper intends to investigate the part delivery of mixedmodel assembly lines with decentralized supermarkets and tow ***,uncertain exception disturbances,including tow train failures and adjustments of the production sequence,are also *** solve this problem,a heuristic-based dynamic delivery strategy is proposed,which dynamically schedules the route,departure time,quantities and types of loaded parts for each *** evaluate the performance of this strategy,it is used to solve an instance in comparison with the periodic delivery strategy,experimental results are reported and their performances are compared under different ***,a multi-scenario analysis is employed to determinate the long-term decisions,including the number of tow trains and the route ***,the critical storage is suggested to be set for each station to avoid part starvation resulting from disturbances,and its effect on the delivery performance is investigated.

关键词： Mixed-model assembly lines dynamic part delivery supermarket tow train critical storage.