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Journal of Thermal Science 2024年第4期33卷 1421-1442页

作者： QIN Runxuan ZHOU Xun WANG Songtao cai le School of Energy Science and Engineering Harbin Institute of TechnologyHarbin150001China

A numerical study is conducted to elucidate the impact of hole shapes and additional flow angles on the flow structure of the coolant and temperature field in the leading edge area of the gas turbine *** typical hole shapes are considered for the GE-E3 *** impact of the additional flow angle(E)within each hole shape on the temperature field is *** results indicate that for the leading edge area and suction surface,the fan-shaped hole case performs best in decreasing temperatures,with a decrease of about 43 *** is mainly due to the fact that the fan-shaped hole has the maximum expansion in hole spanwise *** the pressure surface,the console hole case performs best in decreasing temperatures,with a maximum reduction of about 47.2 *** influence of E on the surface temperature at leading edge area varied between the different hole *** the cylinder hole and console hole,the E=-20°case has the lowest area-averaged *** both the fan-shaped hole and the 7-7-7 shaped hole are expansion holes,the pattern of variation of the leading edge area temperature with increasing E is similar for the fan-shaped hole case and 7-7-7 shaped hole *** E=20°case shows the lowest spanwise-averaged temperature near the hole outlet,and the E=-20°case shows the lowest spanwise-averaged temperature further downstream.

关键词： film cooling GE-E3 turbine rotor blade conjugate heat transfer leading edge

Integrated gut microbiota,plasma metabolomics and network pharmacology to reveal the anti-ischemic stroke effect of cooked rhubarb

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Traditional Medicine Research 2024年第9期9卷 1-13页

作者： Ting Li Lan-Fang Tan Lin Shen Jie-Hui Kuang Si-Kai Zhan Bang Liu Jia-le cai Sheng-Wang Liang Ming-Hua Xian Shu-Mei Wang School of Chinese Materia Medica Guangdong Pharmaceutical UniversityGuangzhou 510006China Key Laboratory of Digital Quality Evaluation of Chinese Materia Medica of State Administration of TCM School of Chinese Materia MedicaGuangdong Pharmaceutical UniversityGuangzhou 510006China Engineering&Technology Research Center for Chinese Materia Medica Quality of the Universities of Guangdong Province School of Chinese Materia MedicaGuangdong Pharmaceutical UniversityGuangzhou 510006China Guangxi Key Laboratory of Functional Phytochemicals Research and Utilization Guangxi Institute of BotanyChinese Academy of SciencesGuilin 541006China Traditional Chinese Medicine Resource Germplasm Bank Management Center Yunfu 527300China

Background:Cooked rhubarb(CR)is obtained by steaming raw rhubarb(Rheum palmatum L.,Rheum officinale Baill.,or Rheum tanguticum *** Balf.)with millet *** is used as a traditional Chinese medicine for treating cerebral stroke,where patients often face severe *** study explored the pharmacological effects and mechanisms of CR against ischemic stroke(IS)in *** used integrated analysis of gut microbiota,metabolomics,and network ***:The compounds in CR were identified using LC-MS/*** impact of CR on rat middle cerebral artery occlusion/reperfusion(MCAO/R)-induced cerebral infarct size and brain tissue pathology was assessed through 2,3,5-triphenyl tetrazolium chloride and HE *** in hemorheology were measured by evaluating blood viscosity,and serum levels of pro-inflammatory cytokine were also *** microbiota composition was analyzed through 16S rRNA gene *** metabolites were examined using untargeted metabolomics and Spearman correlation *** pseudo-germ-free test was used to determine whether tumour necrosis factor-α(TNF-α)and interleukin-1β(IL-1β)improvement in IS are dependent on gut ***:In vivo studies showed CR enhances neurobehavioral function in MCAO/R rats and reduces cerebral infarction *** also ameliorates brain and intestinal barrier damage caused by *** also decreased inflammation and oxidative stress in IS ***,CR promotes the growth of Akkermansia and Verrucomicrobia,aiding in intestinal barrier ***,CR primarily influences the primary bile acid biosynthesis *** pseudo-germ-free experiment and network pharmacology confirmed TNF-αand IL-1βas potential *** relies on gut microbiota for its anti-inflammatory effects to improve ***:Cooked rhubarb offers neuroprotective benefits by enhancing beneficial bacteria abundance and regulating bile acid *** emerges as a potential therapeutic agent for

关键词： cooked rhubarb ischemic stroke gut microbiota metabolomics

联合国经济制裁人道主义豁免的美国“制造”与“续造”

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武大国际法评论 2024年第3期8卷 34-49页

作者：蔡蕾南京大学法学院

联合国安理会第2664号决议就资产冻结制裁规定了统一的人道主义豁免规则,增强了人道主义豁免的标准化和常设性。联合国人道主义豁免规则极有可能影响美国设计本国人道主义豁免机制,因此美国积极提出安理会第2664号决议草案,主导该决议... 详细信息

联合国安理会第2664号决议就资产冻结制裁规定了统一的人道主义豁免规则,增强了人道主义豁免的标准化和常设性。联合国人道主义豁免规则极有可能影响美国设计本国人道主义豁免机制,因此美国积极提出安理会第2664号决议草案,主导该决议的“制造”,并将本国政策实践渗入该决议内容,推动本国人道主义豁免规则国际化。而安理会第2664号决议用语的模糊性为各国在执行层面的自由裁量留下空间,美国通过对该决议的解释、执行和内化,持续对联合国人道主义豁免规则进行“续造”,这将塑造国际社会关于人道主义豁免的互动。对此,中国应继续坚持真正的多边主义,积极参与联合国安理会关于人道主义豁免的造法进程,完善本国执行联合国安理会制裁决议的机制,推动从根源上减少经济制裁对人道民生的负面影响。

关键词：经济制裁人道主义豁免安理会第2664号决议

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非轴造型对涡轮损失控制的攻角适应性研究

工程热物理学报 2024年第10期45卷 3049-3057页

作者：杜政帅蔡乐陈英杰王松涛哈尔滨工业大学能源科学与工程学院哈尔滨150001

非轴对称端壁技术能够有效减小横向二次流带来的气动损失,提升涡轮效率。为了评估不同来流条件下非轴造型在涡轮叶栅中的作用效果,以高压涡轮的静叶叶栅上端壁为研究对象。在0°攻角条件下以涡轮的出口总压损失为优化目标进行了叶栅非... 详细信息

非轴对称端壁技术能够有效减小横向二次流带来的气动损失,提升涡轮效率。为了评估不同来流条件下非轴造型在涡轮叶栅中的作用效果,以高压涡轮的静叶叶栅上端壁为研究对象。在0°攻角条件下以涡轮的出口总压损失为优化目标进行了叶栅非轴对称端壁的造型和优化,研究得到了一种能够有效减小叶栅二次流动能和气动损失的非轴造型,并在变攻角情况下对该造型的损失控制效果进行了分析。结果表明:在所考察的攻角范围内,本研究使用的非轴对称端壁造型均能有效降低叶栅气动损失,且该造型对几个主要的二次流结构的作用效果在不同攻角下没有太大的变化;在二次流强度较弱的负攻角条件下,造型对马蹄涡结构的控制效果相比于其他攻角条件更为显著。

关键词：涡轮静叶二次流控制端壁造型变攻角样条曲面

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电力系统自动化中智能化技术的应用

电力系统装备 2024年第9期 7-9页

作者：蔡乐上海市电力公司松江供电公司上海201600

电力系统的运行效率和稳定性与经济活动的品质有着直接的联系。随着电力需求的增加,人们对电力系统的稳定性也提出了更为严格的标准。为了应对这些挑战,智能化技术便成为了推动电力系统发展的关键途径。文章介绍了智能化技术在电力系统... 详细信息

电力系统的运行效率和稳定性与经济活动的品质有着直接的联系。随着电力需求的增加,人们对电力系统的稳定性也提出了更为严格的标准。为了应对这些挑战,智能化技术便成为了推动电力系统发展的关键途径。文章介绍了智能化技术在电力系统自动化领域的运用,并对其在增强电力系统的稳定性、优化资源分配和提高故障处理能力等方面的贡献进行了分析。

关键词：电力系统电气工程的自动化技术智能技术的应用

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中国译论中如果“中国”在场,儒家已在

上海翻译 2024年第2期 7-13页

作者：蔡新乐胡其维深圳大学广东深圳518060 南京大学江苏南京210023

有了周公确立、孔子继之的“中国”,才有中华文化,并得以发展;中国译论,只能自孔子开篇。但是,有关译史一般都是从佛经翻译的译论写起,多论译技,不及中国思想渊源;近年来,又因崇尚后现代,而直接对“中国”加以解构。本文在对上述问题加... 详细信息

有了周公确立、孔子继之的“中国”,才有中华文化,并得以发展;中国译论,只能自孔子开篇。但是,有关译史一般都是从佛经翻译的译论写起,多论译技,不及中国思想渊源;近年来,又因崇尚后现代,而直接对“中国”加以解构。本文在对上述问题加以辨析之后,试图以《史记》有关“重译”的记载来见证“中国之‘中’”的儒家意涵的理想意义。

关键词：中国孔子翻译

基于建构主义理论的二维核磁共振波谱的教学设计与实践

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化学教育（中英文） 2024年第4期45卷 105-112页

作者：尹田鹏周皓蔡乐遵义医科大学珠海校区生物工程学院广东珠海519041 云南大学化学科学与工程学院云南昆明650091

针对高等院校化学、药学相关专业研究生教学中二维核磁共振波谱(2D NMR)教学中存在的问题,基于构建主义理论设计教学活动。该课程设计创设了适合学生学习的情境,促进了学生协作和协商,帮助学生快速掌握2D NMR的使用,教学实践显示效果良好。

关键词：核磁共振波谱建构主义教学实践

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植物环肽研究进展

中国中药杂志 2024年第5期49卷 1172-1185页

作者：赵冕王磊冯子迈蔡乐贾庆忠河北医科大学教学实验中心河北石家庄050017 河北医科大学药学院河北石家庄050017 云南大学化学科学与工程学院云南昆明650091

植物环肽是一类主要由氨基酸肽键形成的环状含氮化合物,一般包含2~37个L-构型的编码或者非编码氨基酸结构单元,是具有重要研究价值的天然植物小分子代谢产物。科学研究表明,此类天然产物在各科植物中广泛分布,化学成分主要包括环二肽类... 详细信息

植物环肽是一类主要由氨基酸肽键形成的环状含氮化合物,一般包含2~37个L-构型的编码或者非编码氨基酸结构单元,是具有重要研究价值的天然植物小分子代谢产物。科学研究表明,此类天然产物在各科植物中广泛分布,化学成分主要包括环二肽类、环四肽类、环五肽类、环六肽类、环七肽类、环八肽类、环九肽类、环十肽类等,其中环二肽类、环六肽类、环八肽类是其主要活性成分。据报道,植物环肽结构新奇、独特,具有抗肿瘤、抗菌、抗疟、抗炎、抗病毒等多种药理活性。该文对2006年以来植物环肽的研究成果进行了综述,以期为植物环肽及其在相关医药、卫生、农业等领域的进一步研究提供理论参考。

关键词：植物环肽化学成分药理活性

Numerical Investigation of Circumferential Groove Casing Treatment in a Highly-Loaded Low-Reaction Transonic Compressor Rotor

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Journal of Thermal Science 2020年第4期29卷 916-927页

作者： ZHU Wei cai le WANG Songtao WANG Zhongqi School of Energy Science and Engineering Harbin Institute of TechnologyHarbin 150001China

In this paper, a computational investigation of circumferential groove casing treatment in a highly-loaded low-reaction transonic compressor rotor is conducted, in which the stage reaction is significantly reduced due to a larger meridional contraction with respect to conventional transonic compressors. Steady computation at near-stall point is performed first to capture the stall inception of the rotor with smooth casing. Detailed observations, which mainly focus on the tip leakage flow behavior, obstruction and vortical structures in the tip region, determine the reason for the compressor stall. There is tip leakage vortex breakdown in the tip region. Moreover, it yields passage obstruction, and finally leads to the compressor stall. Then, attempts are made to investigate how the circumferential grooves can be applied for the compressor’s stall margin enhancement without compromising efficiency. Three configurations are obtained and analyzed by changing axial position and the number of the circumferential grooves. The results of computational parametric study indicate the optimal location of the groove is near the leading edge and the downstream grooves combine their influence on the compressor’s stabilization and performance in a cumulative manner. The optimal circumferential groove configuration produces an increase of 1% in total pressure ratio at the near-stall point and a gain of 3.7% in stall margin, without any penalty in efficiency. Furthermore, the impact the grooves will exert on the flow mechanisms between the grooves and the main flow is also considered.

关键词： low-reaction transonic compressor circumferential casing groove vortex breakdown stall margin

Numerical Investigation on Effectiveness of Flow Separation Control in Two-dimensional High-load Compressor Cascade by Synthetic Jet

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Journal of Thermal Science 2012年第5期21卷 441-446页

作者： Songtao Wang le cai Xun Zhou Shaopeng Lu Engine Aerodynamics Research Centre Harbin Institute of Technology Harbin 150001 China

The effectiveness of flow separation control in two-dimensional high load cascade by synthetic jet is investigated through numerical simulation of the effect of excitation frequency and amplitude together with the adaptability of synthetic jet to off-design conditions. Test results indicate that synthetic jet can be used to effectively control the large-scale two-dimensional flow separation in compressor cascade. Preferable results can be obtained when excitation frequency is close to or times of the characteristic frequency of original flow field. Excitation amplitude has a more important effect on the effectiveness of flow separation control, and the increase in excitation amplitude can bring about a dramatic decrease in the loss of total pressure. Synthetic jet has also a very good adaptability to off-design conditions. It can therefore be concluded that the incidence sensitivity of compressor cascade can be effectively reduced by synthetic jet.

关键词： synthetic jet excitation frequency excitation amplitude off-design conditions numerical simulation