检索结果-南通市图书馆

General Properties of Low-frequency Power Losses in Fe-based Nanocrystalline Soft Magnetic Alloys

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2000年第1期16卷 37-44页

作者： Yanzhong ZHANG, Huijuan jin and ying shi (Shanghai Key Laboratory for Research and Developing and Applications of Metallic Function Materials, Research Center, Shanghai Iron and Steel Research institute,Shanghai 200940, China) Shanghai Key Lab. for Research and Developing and Applications of Metallic Function Materials Research Center Shanghai Iron and Steel Research Institute Shanghai 200940 China

The dependences of the power loss per cycle on frequency f and amplitude flux density Bm have been investigated for the three main original magnetic states in five sorts of Fe-based nanocrystalline soft magnetic alloys in the ranges of 10 Hz<=f<=1000 Hz and 0.4 T<= Bm <=1.0 T. The total loss P is decomposed into the sum of the hysteresis loss Physt, the classical eddy current loss Pel and the excess loss Pexc. Physt has been found to be proportional to Bm^2 and f. The behavior of Pexc/f vs f being equivalent to P/f vs f clearly exhibits nonlinearity in the range not more than about 120 Hz, whereas the behavior of P/f vs f roughly shows linearity in the range far above 100 Hz and not more than 1000 Hz. In the range up to 1000 Hz, Physt is dominant in the original high permeability state and the state of low residual flux density, whereas Pexc in the state of high residual flux density is dominant in the wider range above about 100 Hz. The framework of the statistical theory of power loss has been used for representing the behavior of Pexc/f vs f. It has been found that the number n of the simultaneously active 'Magnetic Objects' linearly varies as n = n0 + Hexc/H0 as a function of the dynamic field Hexc in the range below about 120 Hz, whereas n approximately follows a law of the form n = n0 + (Hexc/H0)^m with 1 < m < 2 in the range far above 100 Hz and not more than 1000 Hz. The values of the field HO in principle related to the microstructure and the domain structure have been calculated for the three states.

关键词： General Properties of Low-frequency Power Losses in Fe-based Nanocrystalline Soft Magnetic Alloys Fe

把字句和述宾句与韩国语“O ■宾格+VP”句的异同

在线全文

学校读者我要写书评

暂无评论

解放军外国语学院学报 2010年第3期33卷 49-53+87页

作者：金英实延边大学艺术学院文化基础部

把字句、述宾句和韩国语"O ■宾格+VP"句之间存在交叉对应关系。本文考察了3种句式NP的定指性、及物性、全面性、话题性、省略性、复杂程度和VP的处置性强弱程度、复杂程度以及韩国语"O ■宾格+VP"句对应把字句的一些条件。这有助于深... 详细信息

把字句、述宾句和韩国语"O ■宾格+VP"句之间存在交叉对应关系。本文考察了3种句式NP的定指性、及物性、全面性、话题性、省略性、复杂程度和VP的处置性强弱程度、复杂程度以及韩国语"O ■宾格+VP"句对应把字句的一些条件。这有助于深化对把字句特点的认识,也有助于面向韩国学生的把字句教学。

关键词：把字句述宾句 “O ■宾格+VP”句

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

非受事把字句与韩国语相关范畴的对比

解放军外国语学院学报 2007年第3期30卷 29-34页

作者：金英实延边大学艺术学院吉林延吉133000

汉语把字句可分为受事类把字句和非受事类把字句。“把”后的处所、材料、工具、致使、施事等宾语都是非客体格经过宾语化后形成的非常规受事宾语。本文考察了韩汉两种语言格角色在句法成分中的配位和同一格的不同表现形式,并从语义指... 详细信息

汉语把字句可分为受事类把字句和非受事类把字句。“把”后的处所、材料、工具、致使、施事等宾语都是非客体格经过宾语化后形成的非常规受事宾语。本文考察了韩汉两种语言格角色在句法成分中的配位和同一格的不同表现形式,并从语义指向的角度探讨了韩国语的相关表达形式,从而揭示了以韩国语为母语的学生在非受事把字句习得过程中的困难所在。

关键词：非受事把字句汉韩对应形式习得

Serum Metabolic Profiling in a Mouse Model of Adriamycin-Induced Focal Segmental Glomerulosclerosis

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Medical Journal 2018年第22期131卷 2743-2746页

作者： Li Lyu Cai-Li Wang Zeng-Yan Li ying-jin shi Yan-Hui Zhang Yan Mi Zhao Hu Department of Nephrology Qilu Hospital of Shandong UniversityJinanShandong 250012China Department of Nephrology The First Affiliated Hospital of Baotou Medical CollegeBaotouInner Mongolia 014010China

To the Editor:Focal segmental glomerulosclerosis (FSGS)is one of the leading causes of end-stage kidney disease.[1,2] However,no ideal intervention prevents FSGS progression due to the unclear physiopathological *** (ADR)-induced FSGS is a well-accepted model that mimics human ***,a common chemotherapeutic agent associated with nephrotoxicity,causes kidney damage by triggering imbalances between free oxygen radicals and antioxidant enzymes.

关键词： Serum Metabolic Profiling Mouse Model

Broadband and perfect terahertz absorber based on multilayer metamaterial with cross-ring patterned structures

在线全文

学校读者我要写书评

暂无评论

Optoelectronics Letters 2025年第1期21卷 1-6页

作者： WEN jin LIU Zhanzhi WU Zhengwei PAN Yu ZHANG ying School of Science Xi'an Shiyou University Shaanxi Key Laboratory of Measurement and Control Technology for Oil and Gas Wells

Broadband and perfect terahertz absorber based on multilayer metamaterial using cross-ring patterned structures is proposed and investigated. The structure of the absorber is double absorption layers consisting of a chromium cross ring and eight isosceles right triangles. The unique structure of the double absorbing layers excites the electric dipole multimode resonance, giving rise to high absorption performance. Meanwhile, the influence of construal parameters on absorber behavior is also discussed. The numerical results show that the absorption achieves over 90% ranging from 2.45 THz to 6.25 THz and 99% absorption in the range of 3.7—5.3 THz. The realization of broadband and perfect absorber is described using the impedance matching principle. It is obviously found that the absorber is insensitive to the high angle of incidence for both transverse electric(TE) and transverse magnetic(TM) polarizations. Compared with the former reports, this absorber has remarkable improved absorption efficiency and smaller period. The terahertz absorber may be found applications in the fields of energy capture and thermal detection.

关键词： Metamaterials

Tangled but ordered human mitochondrial tRNA maturation

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China Life Sciences 2025年

作者： shi-ying Yao Xiao-Long Zhou Key Laboratory of RNA Innovation Science and Engineering CAS Center for Excellence in Molecular Cell Science Shanghai Institute of Biochemistry and Cell Biology Chinese Academy of Sciences University of Chinese Academy of Sciences Key Laboratory of Systems Health Science of Zhejiang Province School of Life Science Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences

Mitochondria are cellular organelles that originate from an endosymbiotic bacterial ancestor and are primarily responsible for ATP generation via oxidative phosphorylation (OXPHOS). OXPHOS is conducted by five mitochondrial respiratory complexes in the inner mitochondrial membrane. Human mitochondria possess a distinct genome, a small, circular, doublestranded DNA (mtDNA) of 16,569 base pairs.

关键词：

Flexible molecules dedicate to release strain of inverted inorganic perovskite solar cell

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 87-93页

作者： Hongrui Sun Sanlong Wang Pengyang Wang Yali Liu Shanshan Qi Biao shi ying Zhao Xiaodan Zhang Institute of Photoelectronic Thin Film Devices and Technology Renewable Energy Conversion and Storage Center State Key Laboratory of Photovoltaic Materials and CellsNankai University Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin Haihe Laboratory of Sustainable Chemical Transformations Engineering Research Center of Thin Film Photoelectronic Technology of Ministry of Education Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)

The tensile strain in inorganic perovskite films induced by thermal annealing is one of the primary factors contributing to the inefficiency and instability of inorganic perovskite solar cells （IPSCs）,which reduces the defect formation ***,a flexible molecule 5-maleimidovaleric acid （5-MVA） was introduced as a strain buffer to release the residual strain of *** anhydride and carboxyl groups in 5-MVA interact strongly with the uncoordinated Pb2+through Lewis acid-base reaction,thus tightly“pull”the perovskite *** in-between soft carbon chain increased the structural flexibility of CsPbI2.85Br0.15perovskite materials,which effectively relieved the intrinsic internal strain of CsPbI2.85Br0.15,resisted the corrosion of external strain,and also reduced the formation of defects such as VIand *** addition,the introduction of 5-MVA improved crystal quality,passivated residual defects,and narrowed energy level ***,power conversion efficiency （PCE） of NiOxbased inverted IPSCs increased from 19.25% to 20.82% with the open-circuit voltage enhanced from 1.164 V to 1.230 *** release of strain also improved the stability of CsPbI2.85Br0.15perovskite films and devices.

关键词： Perovskite solar cells

A matrix metalloproteinase-responsive hydrogel system controls angiogenic peptide release for repair of cerebral ischemia/reperfusion injury

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第2期20卷 503-517页

作者： Qi Liu Jianye Xie Runxue Zhou jin Deng Weihong Nie Shuwei Sun Haiping Wang Chunying shi Department of Human Anatomy Histology and EmbryologySchool of Basic MedicineQingdao UniversityQingdaoShandong ProvinceChina Department of Neurology The Affiliated Hospital of Qingdao UniversityQingdaoShandong ProvinceChina Department of General Practice The Affiliated Hospital of Qingdao UniversityQingdaoShandong ProvinceChina

Vascular endothelial growth factor and its mimic peptide KLTWQELYQLKYKGI(QK)are widely used as the most potent angiogenic factors for the treatment of multiple ischemic ***,conventional topical drug delivery often results in a burst release of the drug,leading to transient retention(inefficacy)and undesirable diffusion(toxicity)in ***,a drug delivery system that responds to changes in the microenvironment of tissue regeneration and controls vascular endothelial growth factor release is crucial to improve the treatment of ischemic *** metalloproteinase-2(MMP-2)is gradually upregulated after cerebral ***,vascular endothelial growth factor mimic peptide QK was self-assembled with MMP-2-cleaved peptide PLGLAG(TIMP)and customizable peptide amphiphilic(PA)molecules to construct nanofiber hydrogel ***-TIMP-QK was found to control the delivery of QK by MMP-2 upregulation after cerebral ischemia/reperfusion and had a similar biological activity with vascular endothelial growth factor in *** results indicated that PA-TIMP-QK promoted neuronal survival,restored local blood circulation,reduced blood-brain barrier permeability,and restored motor *** findings suggest that the self-assembling nanofiber hydrogel PA-TIMP-QK may provide an intelligent drug delivery system that responds to the microenvironment and promotes regeneration and repair after cerebral ischemia/reperfusion injury.

关键词： angiogenesis biomaterial blood-brain barrier cerebral ischemia/reperfusion injury control release drug delivery inflammation QK peptides matrix metalloproteinase-2 neuroprotection self-assembling nanofiber hydrogel

T cell interactions with microglia in immune-inflammatory processes of ischemic stroke

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第5期20卷 1277-1292页

作者： Yuxiao Zheng Zilin Ren ying Liu Juntang Yan Congai Chen Yanhui He Yuyu shi Fafeng Cheng Qingguo Wang Changxiang Li Xueqian Wang School of Traditional Chinese Medicine Beijing University of Chinese MedicineBeijingChina Library Beijing University of Chinese MedicineBeijingChina Dongzhimen Hospital Beijing University of Chinese MedicineBeijingChina

The primary mechanism of secondary injury after cerebral ischemia may be the brain inflammation that emerges after an ischemic stroke,which promotes neuronal death and inhibits nerve tissue *** the first immune cells to be activated after an ischemic stroke,microglia play an important immunomodulatory role in the progression of the *** an ischemic stroke,peripheral blood immune cells(mainly T cells)are recruited to the central nervous system by chemokines secreted by immune cells in the brain,where they interact with central nervous system cells(mainly microglia)to trigger a secondary neuroimmune *** review summarizes the interactions between T cells and microglia in the immune-inflammatory processes of ischemic *** found that,during ischemic stroke,T cells and microglia demonstrate a more pronounced synergistic ***1,Th17,and M1 microglia can co-secrete proinflammatory factors,such as interferon-γ,tumor necrosis factor-α,and interleukin-1β,to promote neuroinflammation and exacerbate brain ***2,Treg,and M2 microglia jointly secrete anti-inflammatory factors,such as interleukin-4,interleukin-10,and transforming growth factor-β,to inhibit the progression of neuroinflammation,as well as growth factors such as brain-derived neurotrophic factor to promote nerve regeneration and repair brain *** interactions between microglia and T cells influence the direction of the subsequent neuroinflammation,which in turn determines the prognosis of ischemic stroke *** trials have been conducted on the ways to modulate the interactions between T cells and microglia toward anti-inflammatory communication using the immunosuppressant fingolimod or overdosing with Treg cells to promote neural tissue repair and reduce the damage caused by ischemic ***,such studies have been relatively infrequent,and clinical experience is still *** summary,in ischemic stroke,T cell subsets and activated micro

关键词： brain immune inflammation interaction ischemic stroke mechanism microglia neuron secondary injury T cells