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永磁同步电机热保护的简化二阶模型

电机与控制应用 2007年第10期34卷 11-14页

作者：王爱元上海电机学院上海200240

根据永磁同步电机的结构和发热机理,提出永磁同步电机的简化二阶动态热模型及其在电动机伺服控制系统中的热保护的方案和策略。仿真结果表明:二阶热保护模型可根据不同的工矿条件,提高电机的利用率,实现有效的热保护。

关键词：永磁同步电机二阶微分方程热模型热保护

考虑负载不确定的异步电机反馈线性化的最小损耗控制

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电机与控制学报 2017年第5期21卷 73-80页

作者：王爱元李健顾春阳上海电机学院电气学院上海201306

研究异步电机负载变动时基于反馈线性化的最小损耗控制的实现问题。首先分析了异步电机的损耗特性,建立了受电机温度时变参数影响小的最小损耗磁链控制模型,揭示了通过转矩的实时估计对磁链进行控制可实现最小损耗控制。应用微分几何精... 详细信息

研究异步电机负载变动时基于反馈线性化的最小损耗控制的实现问题。首先分析了异步电机的损耗特性,建立了受电机温度时变参数影响小的最小损耗磁链控制模型,揭示了通过转矩的实时估计对磁链进行控制可实现最小损耗控制。应用微分几何精确线性化的理论,建立了考虑负载转矩不确定性的异步电机反馈线性化模型,实现了转速和磁链的线性化解耦控制,电机转矩的实时估计依据参考模型在电动机反馈线性化控制中实现。异步电机的反馈线性化控制既提高了动态时的响应速度,又实现了稳态时的轻载高效率运行。合理选取控制参数,实现转速、磁链以及转矩估计的渐进收敛。仿真实验表明所提控制方法的可行性和有效性。

关键词：异步电机最小损耗反馈线性化控制参考模型转矩估计

Correlation between the rock mass properties and maximum horizontal stress:A case study of overcoring stress measurements

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 39-48页

作者： Peng Li Meifeng Cai Shengjun Miao yuan Li Yu wang Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mines University of Science and Technology BeijingBeijing 100083China State Key Laboratory of Coal Resources and Safe Mining China University of Mining and TechnologyXuzhou 221116China

Understanding the mechanical properties of the lithologies is crucial to accurately determine the horizontal stress *** investigate the correlation between the rock mass properties and maximum horizontal stress,the three-dimensional(3D)stress tensors at 89 measuring points determined using an improved overcoring technique in nine mines in China were adopted,a newly defined characteristic parameter C_(ERP)was proposed as an indicator for evaluating the structural properties of rock masses,and a fuzzy relation matrix was established using the information distribution *** results indicate that both the vertical stress and horizontal stress exhibit a good linear growth relationship with *** is no remarkable correlation between the elastic modulus,Poisson's ratio and depth,and the distribution of data points is scattered and ***,there is no obvious relationship between the rock quality designation(RQD)and *** maximum horizontal stress σ_(H) is a function of rock properties,showing a certain linear relationship with the C_(ERP)at the same *** addition,the overall change trend of σ_(H) determined by the established fuzzy identification method is to increase with the increase of C_(ERP).The fuzzy identification method also demonstrates a relatively detailed local relationship betweenσ_H and C_(ERP),and the predicted curve rises in a fluctuating way,which is in accord well with the measured stress data.

关键词： overcoring stress measurements elastic modulus Poisson's ratio rock quality designation maximum horizontal stress fuzzy identification

Reconstruction characteristics of gut microbiota from patients with type 1 diabetes affect the phenotypic reproducibility of glucose metabolism in mice

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Science China Life Sciences 2025年第1期68卷 176-188页

作者： Zhiyi wang Mengxue Gong yuanyuan Fang Huijuan yuan Chenhong Zhang State Key Laboratory of Microbial Metabolism School of Life Sciences and BiotechnologyShanghai Jiao Tong University Department of Endocrinology Henan Provincial People's HospitalPeople's Hospital of Zhengzhou University

The human microbiota-associated(HMA) mice model, especially the germ-free(GF)-humanized mice, has been widely used to probe the causal relationships between gut microbiota and human diseases such as type 1 diabetes(T1D). However, most studies have not clarified the extent to which the reconstruction of the human donor microbiota in recipient mice correlates with corresponding phenotypic reproducibility. In this study, we transplanted fecal microbiota from five patients with T1D and four healthy people into GF mice, and microbiota from each donor were transplanted into 10 mice. Mice with similar microbiota structure to the donor exhibited better phenotypic reproducibility. The characteristics of the microbial community assembly of donors also influenced the phenotypic reproducibility in mice, and individuals with a higher proportion of stochastic processes showed more severe disorders. Microbes enriched in patients with T1D had a stronger colonization potential in mice with impaired glucose metabolism, and microbiota functional features related to T1D were better reproduced in these mice. This indicates that assembly traits and colonization efficacy of microbiota influence phenotypic reproducibility in GF-humanized mice. Our findings provide important insights for using HMA mice models to explore links between gut microbiota and human diseases.

关键词： gut microbiome human microbiota-associated animal model type 1 diabetes

胸椎半侧骨骺加压矫形钉最大拔出力的实验研究

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中华外科杂志 2007年第14期45卷 976-978页

作者：张巍张永刚王岩汪爱媛解放军总医院骨科北京100853

目的通过山羊半侧骨骺加压矫形钉拔出力的测定,评价不同材料或同一材料不同型号矫形钉的初始稳定性。方法根据6具2～3个月龄山羊胸椎 T_6～T_(11)节段椎体标本的测量数据,设计1种齿间距离为10.0 mm 的不锈钢矫形钉和3种原始齿间距离分别... 详细信息

目的通过山羊半侧骨骺加压矫形钉拔出力的测定,评价不同材料或同一材料不同型号矫形钉的初始稳定性。方法根据6具2～3个月龄山羊胸椎 T_6～T_(11)节段椎体标本的测量数据,设计1种齿间距离为10.0 mm 的不锈钢矫形钉和3种原始齿间距离分别为5.0、6.5、8.0 mm 记忆合金矫形钉。选其中4具标本,每具截成 T_6～T_7、T_8～T_9、 T_(10)～T_(11)三个脊柱功能单位(FSU),重新分配,在每个 FSU 双侧先后置入不锈钢矫形钉和记忆合金矫形钉,分成4组:不锈钢钉组、5.0 mm 记忆合金钉组、6.5 mm 记忆合金钉组、8.0 mm 记忆合金钉组,通过858型生物力学实验机测定矫形钉的最大拔出力。结果 4组矫形钉的最大拔出力均值分别为:不锈钢钉组(20.62±9.15)N,5.0 mm 记忆合金钉组(74.18±8.81)N,6.5 mm 记忆合金钉组(51.28±5.44)N,8.0 mm 记忆合金钉组(39.13±7.54)N,组间比较存在显著性差异(P<0.01);不锈钢钉组最大拔出力小于其他组。结论不同材料的矫形钉初始抗拔出性能不同,记忆合金矫形钉的抗拔出性能优于不锈钢矫形钉。同时,记忆合金矫形钉的抗拔出性能也因其设计不同而不同,原始齿尖距离越小,所需最大拔出力越大。

关键词：胸椎动物实验加压矫形钉最大拔出力

Mechanism of inflammatory response and therapeutic effects of stem cells in ischemic stroke:current evidence and future perspectives

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Neural Regeneration Research 2025年第1期20卷 67-81页

作者： Yubo wang Tingli yuan Tianjie Lyu Ling Zhang Meng wang Zhiying He Yongjun wang Zixiao Li Vascular Neurology Department of NeurologyBeijing Tiantan HospitalCapital Medical UniversityBeijingChina China National Clinical Research Center for Neurological Diseases Beijing Tiantan HospitalCapital Medical UniversityBeijingChina Shanghai Engineering Research Center of Stem Cells Translational Medicine ShanghaiChina National Center for Healthcare Quality Management in Neurological Diseases Beijing Tiantan HospitalCapital Medical UniversityBeijingChina Institute for Regenerative Medicine Shanghai East HospitalSchool of Life Sciences and TechnologyTongji UniversityShanghaiChina Chinese Institute for Brain Research BeijingChina Research Unit of Artificial Intelligence in Cerebrovascular Disease Chinese Academy of Medical SciencesBeijingChina Beijing Engineering Research Center of Digital Healthcare for Neurological Diseases BeijingChina

Ischemic stroke is a leading cause of death and disability worldwide,with an increasing trend and tendency for onset at a younger ***,in particular,bears a high burden of stroke *** recent years,the inflammatory response after stroke has become a research hotspot:understanding the role of inflammatory response in tissue damage and repair following ischemic stroke is an important direction for its *** review summarizes several major cells involved in the inflammatory response following ischemic stroke,including microglia,neutrophils,monocytes,lymphocytes,and ***,we have also highlighted the recent progress in various treatments for ischemic stroke,particularly in the field of stem cell ***,understanding the complex interactions between inflammation and ischemic stroke can provide valuable insights for developing treatment strategies and improving patient *** cell therapy may potentially become an important component of ischemic stroke treatment.

关键词： cell therapy immune cell inflammatory ischemic stroke stem cell

Recent progress on photoactive nonprecious transition-metal complexes

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Science China Chemistry 2025年第1期68卷 46-95页

作者： Zhong-Liang Gong Hong-Jie Zhang Yan Cheng Jianxun Liu Yuhan ai Yaqin Li Zhihui Feng Qiong Zhang Shaolong Gong Yong Chen Chang-Jiang Yao yuan-yuan Zhu Liang-Jin Xu Yu-Wu Zhong CAS Key Laboratory of Photochemistry Institute of Chemistry Chinese Academy of Sciences State Key Laboratory of Structural Cemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences School of Chemistry and Chemical Engineering Anhui Key Laboratory of Advanced Catalytic Materials and Reaction EngineeringHefei University of Technology State Key Laboratory of Explosion Science and Safety Protection School of Mechatronical Engineering Beijing Institute of Technology College of Chemistry and Molecular Sciences Hubei Key Lab on Organic and Polymeric Optoelectronic Materials Wuhan University School of Chemistry and Chemical Engineering Anhui University Key Laboratory of Photochemical Conversion and Optoelectronic Materials & CAS-HKU Joint Laboratory on New Materials Technical Institute of Physics and Chemistry Chinese Academy of Sciences

Photoactive complexes of nonprecious transition metals, mainly including those in the first-row and partially the second-row of the Periodic table of elements, have received increasing attention in view of their low cost and long-term sustainability. They are recognized as promising alternatives to noble transition metal complex congeners that have been extensively studied in optoelectronic devices, artificial photosynthesis, photocatalysis, biodiagnostics, and therapeutics, etc. This review is devoted to a comprehensive summary on the classical and recent advances on photoactive nonprecious transition metal complexes, including photoactive Zr, V, Cr, Mo, and W complexes, Mn complexes and hybrids, Fe, Co, Ni, and Cu complexes, and Zn and Cd complexes and hybrids. A particular focus is given on the molecular design, modulation of photophysical and photochemical properties, and applications of the representative and lately-developed nonprecious metal complexes. In addition, a perspective on the future development in this field is provided at the end of this review.

关键词： photoactive metal complexes earth-abundant metals nonprecious metal complexes luminescence photochemistry

Assessing the corrosion protection property of coatings loaded with corrosion inhibitors using the real-time atmospheric corrosion monitoring technique

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 119-126页

作者： Xiaoxue wang Lulu Jin Jinke wang Rongqiao wang Xiuchun Liu Kai Gao Jingli Sun Yong yuan Lingwei Ma Hongchang Qian Dawei Zhang School of Energy and Power Engineering Beihang UniversityBeijing 100191China Beijing Institute of Space Long March Vehicle Beijing 100076China National Materials Corrosion and Protection Data Center University of Science and Technology BeijingBeijing 100083China Institute of Materials Intelligent Technology Liaoning Academy of MaterialsShenyang 110004China Shanghai Spaceflight Precision Machinery Institute Shanghai 201600China

The atmospheric corrosion monitoring(ACM)technique has been widely employed to track the real-time corrosion behavior of metal ***,limited studies have applied ACM to the corrosion protection properties of organic *** study compared a bare epoxy coating with one containing zinc phosphate corrosion inhibitors,both applied on ACM sensors,to observe their corrosion protection properties over *** with artificial damage via scratches were exposed to immersion and alternating dry and wet environments,which allowed for monitoring galvanic corrosion currents in *** the corrosion tests,the ACM currents of the zinc phosphate/epoxy coating were considerably lower than those of the blank epoxy *** trend in ACM current variations closely matched the results obtained from regular electrochemical tests and surface *** alignment highlights the potential of the ACM technique in evaluating the corrosion protection capabilities of organic *** with the blank epoxy coating,the zinc phosphate/epoxy coating showed much-decreased ACM current values that confirmed the effective inhibition of zinc phosphate against steel corrosion beneath the damaged coating.

关键词： atmospheric corrosion monitoring technology corrosion inhibitor coating carbon steel corrosion protection

外源性表皮生长因子与端侧吻合后的神经再生(英文)

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中国临床康复 2005年第14期9卷 252-253页

作者：尚咏汪爱媛卢世璧余征解放军空军总医院骨科北京市100036 解放军总医院骨科研究所北京市100853

背景:研究证实通过端侧吻合方式可诱导神经侧芽再生,但再生效果达不到神经端端吻合的水平,应用外源性表皮生长因子具有促进体外神经元存活及神经再生的效果,可否提高端侧周围神经吻合的再生率?目的:评价外源性表皮生长因子对端侧吻合后... 详细信息

背景:研究证实通过端侧吻合方式可诱导神经侧芽再生,但再生效果达不到神经端端吻合的水平,应用外源性表皮生长因子具有促进体外神经元存活及神经再生的效果,可否提高端侧周围神经吻合的再生率?目的:评价外源性表皮生长因子对端侧吻合后神经远段再生的影响。设计:随机对照实验。单位:解放军总医院骨科研究所。对象:实验于2001-09/2002-02在解放军总医院骨研所完成。雄性Wister大白鼠32只,体质量200～250g,随机分成表皮生长因子组和对照组,每组16只。方法:表皮生长因子组:切断右侧腓神经,在邻近的胫神经干外膜上开一1mm小窗,将腓神经远端吻合到胫神经干侧方开窗处。右小腿外侧肌肉注入用生理盐水稀释为2g/L的表皮生长因子注射液0.1mL/d,共用2周;对照组:吻合方法同表皮生长因子组,术后注射等量的生理盐水2周。两组分别于术后4周和8周进行大体、组织学、形态定量学和电生理检测。主要观察指标:两组术后有髓神经纤维再生率,运动神经传导速度,超微结构变化。结果:32只大鼠均进入结果分析。①有髓神经纤维再生率:术后4,8周时,表皮生长因子组优于对照组(52.42±1.45)%,(61.41±1.54)%,(34.60±1.52)%,(38.64±1.89)%,P<0.05。②运动神经传导速度:术后4,8周表皮生长因子组明显比对照组加快(30.33±0.88)m/s,(34.

关键词：外源性表皮生长因子神经再生吻合后端侧运动神经传导速度解放军总医院神经纤维再生 Wister 随机对照实验超微结构变化吻合周围神经生理盐水神经元存活骨科研究所对照组电生理检测形态定量学超微结构观吻合方式