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Automatic and Rapid Throughflow-Based Optimal Design Method for Multi-Stage Axial-Flow Compressors

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Journal of Thermal Science 2025年第1期 77-91页

作者： lei Fan ZHANG Xiawen JU Yaping ZHANG Chuhua Department of Fluid Machinery and Engineering School of Energy and Power EngineeringXi'an Jiaotong University Production and Environmental Department China Huaneng Group.Co.Ltd. State Key Laboratory for Strength and Vibration of Mechanical Structures Xi'an Jiaotong University

Throughflow design has the advantages of less time consumption and large optimization space,and thus is the corner stone of advanced design system of multi-stage axial-flow *** majority of relevant studies were limited to the throughflow inverse designs,and quite few works have been till now devoted to the throughflow optimal *** this work,an automatic and rapid throughflow-based optimal design method is proposed for axial-flow compressors in which a throughflow inverse design solver is embedded in optimal genetic algorithm to improve the design efficiency of axial-flow *** types of design parameters in the throughflow inverse design of axial-flow compressors,i.e.,swirl and shroud curve,are simultaneously used to optimize both the blade shape and flow *** proposed method is validated by the redesign optimization of the benchmark axial-flow compressor NASA Stage 35,and the CFD predictions show that the throughflow-based optimization leads to 1.18% efficiency benefit at design *** proposed method is then utilized to the two-dimensional throughflow optimal design of a large-scale 6.5-stage axial-flow industrial *** optimal design results are confirmed by CFD predictions,indicating that the proposed method can effectively improve the design adiabatic efficiency of the compressors by 1.09% within a few minutes on desk-top *** throughflow design implications are also obtained for advanced axial-flow industrial *** work could enhance the capability of throughflow design method and has engineering application value to explore the throughflow optimization space of multi-stage axial-flow compressors.

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大鼠脂肪间充质干细胞及其外泌体的蛋白组学对比分析

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中国组织工程研究 2025年第13期29卷 2683-2689页

作者：张鑫瑞韩悦雷蕾刘建宇耿承奎云南中医药大学第二临床医学院云南中医药大学呈贡校区云南省昆明市650000 昆明医科大学附属延安医院骨科云南省昆明市650000

背景:从蛋白组学方面分析脂肪间充质干细胞及其来源外泌体促进组织修复的研究较多,但缺少二者之间的蛋白组学对比分析。目的:对脂肪间充质干细胞及其外泌体进行蛋白组学分析。方法:分离培养大鼠脂肪间充质干细胞,从细胞上清液中提取外... 详细信息

背景:从蛋白组学方面分析脂肪间充质干细胞及其来源外泌体促进组织修复的研究较多,但缺少二者之间的蛋白组学对比分析。目的:对脂肪间充质干细胞及其外泌体进行蛋白组学分析。方法:分离培养大鼠脂肪间充质干细胞,从细胞上清液中提取外泌体并进行鉴定;运用DIA蛋白组学分析大鼠脂肪间充质干细胞及其外泌体差异表达蛋白,对差异表达蛋白进行GO和KEGG分析。结果与结论:①脂肪间充质干细胞以长梭形为主,类似成纤维样;②经BCA法测定外泌体悬液的蛋白质量浓度为7.66 mg/mL;③外泌体呈典型的茶杯型,可见双层膜的囊泡结构,中央为低电子密度成分,外泌体粒径分布峰值为112.2 nm,浓度为7.5×10^(11)粒子/mL,平均直径在70-140 nm之间;④外泌体有表面标记蛋白CD9、TSG101高表达;⑤GO分析脂肪间充质干细胞及其外泌体的差异表达蛋白主要集中在细胞外基质和突触等位置,与离子结合和核糖体的结合能力相关,在细胞黏附和翻译过程中最为显著;⑥KEGG通路分析结果显示,差异表达蛋白主要参与细胞外基质受体交互、核糖体和细胞因子受体相互作用等,并且与胆固醇和甲状腺等多种代谢性疾病有关。

关键词：脂肪间充质干细胞外泌体蛋白组学对比分析组织修复

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黄土边坡微生物矿化加固及植被恢复试验

水土保持研究 2025年第1期32卷 227-234+242页

作者：雷磊王良樊成虎刘子瑞宋洋薛倩楠田堪良段金贵国网陕西省电力有限公司电力科学研究院国网(西安)环保技术中心有限公司国网陕西省电力有限公司国网陕西省电力有限公司安康水力发电公司国网陕西省电力有限公司西安供电公司西北农林科技大学水土保持研究所中国科学院水利部水土保持研究所黄河水利委员会西峰水土保持科学试验站

[目的]研究黄土边坡微生物矿化加固及植被恢复，为黄土边坡的加固及坡面土壤侵蚀防治提供新方法和新技术。[方法]采用微生物诱导碳酸钙沉淀(Microbially Induced Calcite Precipitation, MICP)技术对黄土边坡进行矿化加固处理，并在固... 详细信息

[目的]研究黄土边坡微生物矿化加固及植被恢复，为黄土边坡的加固及坡面土壤侵蚀防治提供新方法和新技术。[方法]采用微生物诱导碳酸钙沉淀(Microbially Induced Calcite Precipitation, MICP)技术对黄土边坡进行矿化加固处理，并在固化黄土边坡上进行植被恢复，利用扫描电子显微镜(SEM)和光学显微镜，从微观角度探究MICP技术对黄土边坡矿化加固的作用机制，并统计分析了固化黄土边坡的植被恢复效果。[结果]采用MICP技术对黄土边坡进行固化处理后，在坡面上生成的固化层将松散且相邻的土壤颗粒胶结在一起，使黄土坡面形成一个整体，固化层最大厚度为0.23 cm,平均厚度为0.21 cm;固化黄土边坡恢复植被后第60天，A1,A2,B1,B2,A1B1,A2B2各区域内植被成活率比A0,B0,A0B0各区域分别显著提高26.66%,20%,37.5%,25%,33.33%,25%(p<0.05),第60天后，各区域内植被的成活率均差异显著，而且固化后加保水剂的A1,B1,A1B1各区域内植被的成活率最高；固化后加保水剂的B1和A1B1区域内紫穗槐高度和地径的生长变化量最大，且固化后加保水剂的A1,B1,A1B1各区域内麦冬草和紫穗槐的生长状况最好。[结论]采用MIC技术可以有效固化黄土坡面，与植被恢复技术相结合，既能防治土壤侵蚀，又能恢复生态环境。这种综合防治措施为黄土边坡水土流失防治与生态修复提供了良好的技术支持。

关键词：黄土边坡微生物矿化加固技术植被恢复边坡防护

Exit options sustain altruistic punishment and decrease the second-order free-riders, but it is not a panacea

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Science China(Information Sciences) 2025年第1期 278-291页

作者： Chen SHEN Zhao SONG lei SHI Jun TANIMOTO Zhen WANG Faculty of Engineering Sciences Kyushu University School of Statistics and Mathematics Yunnan University of Finance and Economics School of Computing Engineering and Digital Technologies Teesside University School of Artificial Intelligence OPtics and Electro Nics (iOPEN) Northwestern Polytechnical University

Why do humans punish free riders at their own expense? This behavior represents an evolutionary puzzle in human societies. This study explores the role of exit strategies in fostering altruistic punishment within evolutionary game theory. We extend the traditional prisoner's dilemma model by incorporating exiters, players who opt out for a small payoff while nullifying their opponent's payoff, and altruistic punishers who cooperate and punish non-cooperators. Our findings indicate that in well-mixed populations, exiters destabilize defection but do not promote altruistic punishment. In social networks, however,exiters enable altruistic punishment via cyclic dominance among altruistic punishers, defectors, and exiters. Notably, this cyclic dominance is sensitive to exit payoffs; adjustments can lead to cyclic dominance of non-punishing cooperators, defectors, and exiters, or to a bi-stable state between these two types of cyclic dominance. These results highlight the nuanced impact of exiters on altruistic punishment, emphasizing the need for careful incentivization of exit behavior. While exiters can support altruistic punishment in networked populations, their effectiveness is not a panacea and is highly sensitive to exit payoffs, indicating limits to the voluntary participation mechanism.

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Overview of the development history of China’s typhoon research and operational work in the past century

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Science China Earth Sciences 2020年第3期63卷 362-383页

作者： Xiaotu lei Shanghai Typhoon Institute of China Meteorological Administration Shanghai Meteorological Bureau

Because typhoons are one of the most major natural disasters in the southeastern coastal areas of China,great attention has been paid to the prevention and mitigation of the disasters caused by *** the past century,significant progress has been made in typhoon-related scientific research and operational work in China,including the construction of a network of typhoon monitoring stations,the establishment of forecasting operation systems,early warning and prevention of typhoon-related disasters,and the research of basic theories of typhoon behaviors and key forecasting *** paper briefly reviews the milestones in the development history of typhoon research in China over the past century and a half in order to commemorate the predecessors,especially those who made historical contributions to the advancement of typhoon research since the economic and cultural reforms known as the"Opening of China",who provided historical references which enabled China to become an international leader in the field of typhoon science and technology.

关键词： Typhoon Scientific research and operations Development history Review

基于多目标优化的工作量感知即时软件缺陷预测特征构建方法

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计算机科学 2025年第1期52卷 232-241页

作者：赵晨阳刘磊江贺大连理工大学软件学院辽宁大连116600

即时软件缺陷预测(JIT-SDP)是一种针对代码变更的软件缺陷预测技术,具有细粒度、即时性和可追溯性的优点。工作量感知JIT-SDP进一步考虑代码检查工作量,旨在以有限的工作量识别更多的缺陷变更。尽管目前已有不少工作量感知JIT-SDP,但这... 详细信息

即时软件缺陷预测(JIT-SDP)是一种针对代码变更的软件缺陷预测技术,具有细粒度、即时性和可追溯性的优点。工作量感知JIT-SDP进一步考虑代码检查工作量,旨在以有限的工作量识别更多的缺陷变更。尽管目前已有不少工作量感知JIT-SDP,但这些方法大多只针对分类模型算法进行优化。为提升工作量感知JIT-SDP的性能表现与泛用性,首次从特征工程方面入手,提出了一种工作量感知场景下的进化特征构建方法EEF。首先,EEF方法通过遗传编程树来表示特征,从分类性能与工作量感知性能两个角度出发,通过基于多目标优化的进化特征构建方法来获取新的特征转换方法;之后,通过得到的特征转换方法来构建新的特征集,并基于新的特征集训练与测试分类模型。为了验证EEF方法的有效性,在6个开源项目上,通过3个不同评估方案进行了实验研究,结果证明EEF方法可以提升分类模型在工作量感知场景下的性能,并优于其他特征工程方法,而且在保证特征选取多样性的前提下,基于单一模型的EEF方法同样可以提升其他模型的性能。

关键词：即时缺陷预测工作量感知进化特征构建多目标优化特征工程

Mechanical effects of circular liquid inclusions inside soft matrix:role of internal pressure change and surface tension

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Applied Mathematics and Mechanics(English Edition) 2021年第4期42卷 501-510页

作者： lei ZHANG College of Mechanical and Vehicle Engineering Chongqing UniversityChongqing 400044China

The mechanical effects of dilute liquid inclusions on the solid-liquid composite are explored,based on an analytical circular inclusion model incorporating the internal pressure change of the liquid and the surface tension of the *** simple explicit dependences of the stress field and effective stiffness on the bulk modulus and the size of the liquid,the surface tension,and Poisson’s ratio of the matrix are *** results show that the stresses in the matrix are reduced,and the stiffness of the solid-liquid composite is enhanced with the consideration of either the surface tension or the internal pressure ***,the effective Young’s modulus predicted by the present model for either soft or stiff matrices agrees well with the known experimental *** addition,according to the theoretical results,it is possible to stiffen a soft solid by pressured gas with the presence of the surface tension of the solid-gas interface.

关键词： liquid inclusion stress field effective stiffness surface tension internal pressure change

有限元分析不同内固定方式治疗肱骨近端骨折的力学差异

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中国组织工程研究 2025年第15期29卷 3101-3109页

作者：王磊王清张申申福建医科大学附属闽东医院福建省福安市355000 福建医科大学福建省福州市350108

背景:目前临床中治疗肱骨近端骨折的钢板内固定方式仍无绝对标准,但重建内侧肱骨距并有效抵抗肱骨头内翻移位是实现肱骨近端骨折坚强固定的要点。目的:利用有限元分析技术获得3种内固定方式作用于肱骨近端骨折的力学差异,对比何种内固... 详细信息

背景:目前临床中治疗肱骨近端骨折的钢板内固定方式仍无绝对标准,但重建内侧肱骨距并有效抵抗肱骨头内翻移位是实现肱骨近端骨折坚强固定的要点。目的:利用有限元分析技术获得3种内固定方式作用于肱骨近端骨折的力学差异,对比何种内固定方法可以提供更加稳定的固定支撑。方法:选择一名健康女性志愿者进行左肩关节的CT扫描,通过有限元分析软件构建肱骨近端骨折伴内侧柱支撑缺损模型。根据钢板内固定方式将模型划分为3组:A组仅在外侧应用Philos钢板固定;B组外侧应用Philos钢板联合内侧微型直行锁定加压板固定;C组外侧Philos钢板联合前内侧微型直行锁定加压板固定。在相同的固定支撑和约束条件下,采用ANSYS分析软件评估3组内固定模型的生物力学稳定性。结果与结论:①3组内固定模型的内固定物应力均未超过450 MPa;②不同载荷条件下,A组肱骨和内固定物的应力较高于B、C两组,而C组的肱骨和内固定物的应力均为最小值;③在屈曲载荷条件下,C组的相对位移对比A、B两组数值较小;④所有载荷条件下,B组的骨折端相对位移是最小的;在内收、外展以及轴向压缩的载荷条件下,B组的相对位移大约只有A组的一半;⑤C组与B组之间的相对位移并没有显著的差异,且C组的相对位移也均小于A组;⑥结果发现,相较于仅应用外侧Philos钢板,外侧Philos钢板与内侧微型直行锁定加压板的联合应用,以及外侧Philos钢板与前内侧微型直行锁定加压板的联合应用,均展现出显著的内固定系统稳定性,后两种组合在内固定系统稳定性上并未呈现出明显差异;综合考虑临床实践中的操作难易程度,外侧Philos钢板与前内侧微型直行锁定加压板的联合内固定方式治疗肱骨近端骨折可能更具优势。

关键词：肱骨近端骨折内侧柱重建 Philos钢板双钢板有限元分析

On-line trajectory generation of midcourse cooperative guidance for multiple interceptors

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Journal of Systems Engineering and Electronics 2022年第1期33卷 197-209页

作者： CHEN Wenyu SHAO lei lei Humin Air and Missile Defense College Air Force Engineering UniversityXi’an 710051China

The cooperative interception trajectories generation of multiple interceptors to hypersonic targets is ***,to solve the problem of on-line trajectory generation of the single interceptor,a generation method based on neighborhood optimal control is ***,when intercepting the strong maneuvering targets,the single interceptor is insufficient in maneuverability,therefore,an on-line multiple trajectories generation algorithm is proposed,which uses the multiple interceptors intercept area(IIA)to cover the target's predicted intercept area(PIA)*** optimizing the interceptors'zero control terminal location,the trajectories are generated on-line by using the neighborhood optimal control method,these trajectories could make the IIA maximally cover the *** simulation results show that the proposed method can greatly improve the interception probability,which provides a reference for the collaborative interception of multiple interceptors.

关键词： cooperative interception trajectories generation near space