检索结果-南通市图书馆

The anomalous shift of the weak boson mass and the quintessence electroweak axion

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2023年第3期75卷 70-74页

作者： weikang lin Tsutomu T Yanagida Norimi Yokozaki Tsung-Dao Lee Institute(TDLI)&School of Physics and Astronomy Shanghai Jiao Tong UniversityShengrong Road 520201210 ShanghaiChina Kavli IPMU(WPI) The University of TokyoKashiwaChiba 277-8583Japan Zhejiang Institute of Modern Physics and Department of Physics Zhejiang UniversityHangzhouZhejiang 310027China

One of the simplest ways to account for the observed W-boson mass shift is to introduce the SU(2)L triplet Higgs boson with zero hypercharge,whose vacuum expectation value is about 3 *** the triplet is heavy enough at O(1) TeV,it essentially contributes only to T parameter without any conflict with the *** presence of a complex triplet Higgs boson raises the SU(2)_(L) gauge coupling constant toα_(2)(M_(PL))≃1/44 at the Planck *** to this larger gauge coupling constant,we show that the electroweak axion vacuum energy explains the observed cosmological constant provided that the axion field is located near the hill top of the potential at present.

关键词： electroweak axion dark energy dark matter W-boson mass anomaly

Research on cooling-temperature control strategy of fuel-cell engine test bench

在线全文

学校读者我要写书评

暂无评论

Clean Energy 2023年第1期7卷 42-52页

作者： Chang Du Tiancai Ma weikang lin Kaihang Song Yonghao Liang School of Automotive Studies Tongji UniversityShanghai201804PR China Institute of Carbon Neutrality Tongji UniversityShanghai200092PR China

As one of the important ways to utilize hydrogen energy,fuel cells are receiving more and more attention and research from countries and *** meet the practical needs of testing the performance of high-power fuel-cell systems and simulate the actual application environment as much as possible,a fuel-cell system test bench is usually used to test the system performance,in which the cooling-temperature control of the test bench has a great impact on the results of the performance of the fuel-cell *** paper studies the cooling-temperature control strategy of a 150-kW-class fuel-cell engine test platform,proposes a new test-bench cooling-system structure with a thermostat and heat exchanger as the main heat-dissipation components,and compares and analyzes the impact of coordinated thermostat and heat-exchanger control on the fuel-cell system test *** test results show that the control strategy of the coordinated operation of a thermostat and heat exchanger can maintain the steady-state error to within±0.3℃and maintain the temperature variation to within±1.5℃during the loading-condition test,so as to avoid the limitation of system output performance due to excessive cooling-temperature fluctuation and ensure that the fuel-cell engine performance-test process is carried out smoothly and efficiently.

关键词： fuel-cell engine test bench cooling-temperature control strategy thermostat heat exchanger

Féeton(B-L gauge boson)dark matter for the 511-keV gamma-ray excess and the prediction of low-energy neutrino flux

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics C 2024年第8期48卷 76-82页

作者： Jie Sheng Yu Cheng weikang lin Tsutomu T.Yanagida Tsung-Dao Lee Institute&School of Physics and Astronomy Shanghai Jiao Tong UniversityChina Key Laboratory for Particle Astrophysics and Cosmology(MOE)&Shanghai Key Laboratory for Particle Physics and Cosmology Shanghai Jiao Tong UniversityShanghai 200240China South-Western Institute For Astronomy Research Yunnan UniversityKunming 650500China Kavli IPMU(WPI) UTIASUniversity of TokyoKashiwa277-8583Japan

The féeton is the gauge boson of the U(1)_(B−L) gauge *** the gauge coupling constant is extremely small,the féeton becomes a candidate for dark *** show that its decay to a pair of an electron and a positron explains the observed Galactic 511-keV gamma-ray excess in a consistent *** féeton dark matter decays mainly into pairs neutrino and *** low-energy experiments with improved directional capability will enable capturing these neutrino *** seesaw-motivated parameter space predicts a relatively short féeton lifetime that is comparable to the current cosmological constraint.

关键词： feeton 511-keV gamma-ray excess low-energy neutrino

A review on the sealing structure and materials of fuel-cell stacks

在线全文

学校读者我要写书评

暂无评论

Clean Energy 2023年第1期7卷 59-69页

作者： Jinghui Zhao Huijin Guo Yuchen Xing Shaobo Ping weikang lin Yanbo Yang Zixi Wang Tiancai Ma School of Automotive Studies Tongji UniversityNo.4800 Caoan HighwayShanghaiP.R.China Institute of Carbon Neutrality Tongji UniversityShanghai200092P.R.China AT&M Environmental Engineering Technology Co. LtdNo.76 Xueyuan South RoadHaidian DistrictBeijing100081P.R.China Central Iron and Steel Research Institute Group No.76 Xueyuan South RoadHaidian DistrictBeijing100081P.R.China Department of Mechanical Engineering Tsinghua UniversityBeijing 100084P.R.China

Proton-exchange-membrane fuel cells(PEMFCs)have the characteristics of zero emissions,a low operating temperature and high power density,and have great potential in improving energy-utilization ***,fuel cells are still quite expensive as a result of the cost of key components,including the membranes,catalysts and bipolar plates of *** a result of the cost and importance of these items,most researchers have focused on improving the lifetime and performance of fuel-cell stacks in recent *** contrast,seals,sealants and adhesives play a more mundane role in the overall performance of a fuel cell,but failure of these materials can lead to reduced system efficiency,system failure and even safety *** attention has been paid to the performance and durability of these products but as other fuel-cell components improve,these seals are becoming an even more critical link in the long-term performance of fuel *** article highlights the importance and background of fuel-cell *** latest research progress on the mechanical properties and structural optimization of different sealing materials is reviewed.

关键词： proton-exchange-membrane fuel cell sealing structure sealing materials

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

非饱和混合土动剪切模量与阻尼比试验研究

西南交通大学学报 2016年第5期51卷 1033-1040页

作者：崔凯林维康西南交通大学陆地交通地质灾害防治技术国家工程实验室四川成都610031 西南交通大学土木工程学院四川成都610031

川西山区广泛分布着崩坡积混合土,且在自然条件下常处于非饱和状态.动剪切模量和阻尼比是进行场地地震反应分析时必不可少的动力特性参量.为研究该地区上述两个参数的影响因素,运用动三轴仪,获取了小应变范围内循环荷载作用下混合土动... 详细信息

川西山区广泛分布着崩坡积混合土,且在自然条件下常处于非饱和状态.动剪切模量和阻尼比是进行场地地震反应分析时必不可少的动力特性参量.为研究该地区上述两个参数的影响因素,运用动三轴仪,获取了小应变范围内循环荷载作用下混合土动应力应变骨干曲线、滞回曲线,拟合得到动剪切模量/最大动剪切模量-剪应变幅值和阻尼比-剪应变幅值曲线,系统研究了两个曲线函数随含水量和细颗粒含量的变化规律.研究结果表明:饱和程度和细颗粒含量对动剪切模量和阻尼比有显著影响,其影响程度还与矿物成分有关;在对比分析基础上,提出适用于崩坡积混合土在饱和、非饱和状态下的动剪切模量比和阻尼比推荐值,为川西山区地震安全评估提供参数取值依据.

关键词：非饱和混合土细颗粒含量动剪切模量阻尼比

Vortex‑Inspired Hydrodynamic Drafting Spinning Platform for Large‑Scale Preparation of Hydrogel Fibers

在线全文

学校读者我要写书评

暂无评论

Advanced Fiber Materials 2024年第6期6卷 1710-1728页

作者： Jinhua Dong Lei Wang Yi Chen Boyu Xu Hai Tang Ziqiang Zhao weikang lin Huijing Hu Peihang Li Runfeng Cao Long Wang Lei Zhang Yunlang She Bingyao Deng Weiyan Sun Chang Chen Dawei Li Nonwoven Technology Laboratory College of Textile Science and EngineeringJiangnan UniversityWuxi 214122JiangsuChina Department of Thoracic Surgery Shanghai Pulmonary HospitalTongji University School of MedicineShanghai 200092China Shanghai Engineering Research Center of Lung Transplantation Shanghai 200433China

Hydrogel fibers have gained considerable attention,but their large-scale production and industrial application are currently *** key lies in precise diameter control and industrial manufacturing with a straightforward,energy-saving,and efficient ***,we introduce a hydrodynamic drafting spinning platform inspired by water *** employs the rotation of a nonsolvent to generate vortices and further facilitate the efficient drafting of hydrogel *** sup-porting equipment,we have achieved impressive results,including scalable production capabilities(1 h,single channel output of 2×10^(3) m of fibers)and extensive ***,by simply regulating the velocity difference between fiber extrusion and fluid vortex,hydrogel fibers can be drafted to any diameter from about 1 mm to 5×10^(-2) mm(for chi-tosan system).Notably,this platform endows hydrogel fibers to carry functional hydrophilic or hydrophobic *** significant,these delicate hydrogel fibers seamlessly integrate with subsequent manufacturing *** allows the production of various end products,such as fiber bundles,yarns,fabrics,and ***,the immense potential in biomedical applications has been demonstrated after obtaining hydrogel fiber-based nonwoven as wound *** summary,the hydrodynamic drafting spinning platform offers an effective solution for the large-scale production of diameter-controllable,multifunctional hydrogel fibers.

关键词： Hydrogel fiber Hydrodynamic drafting spinning platform Large-scale production Gentle drafting Biomedical application

Vascular Endothelial Growth Factor‑Recruiting Nanofiber Bandages Promote Multifunctional Skin Regeneration via Improved Angiogenesis and Immunomodulation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advanced Fiber Materials 2023年第1期5卷 327-348页

作者： Yi Chen Zhengchao Yuan Weiyan Sun Muhammad Shafiq Jun Zhu Jiafei Chen Hai Tang ling Hu weikang lin Yanxi Zeng Long Wang Lei Zhang Yunlang She Hui Zheng Guofang Zhao Dong Xie Xiumei Mo Chang Chen Department of Thoracic Surgery Shanghai Pulmonary HospitalTongji UniversityShanghai 200092China Shanghai Engineering Research Center of Lung Transplantation Shanghai 200433China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Shanghai Engineering Research Center of Nano‑Biomaterials and Regenerative MedicineCollege of Biological Science and Medical EngineeringDonghua UniversityShanghai 201620China Center for Life Science Tsinghua UniversityBeijing 100084China State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science Institutes of Brain ScienceFudan UniversityShanghai 200433China Department of Chemical Engineering Faculty of EngineeringGraduate SchoolKyushu UniversityFukuoka 819‑0395Japan Department of Cardiology Shanghai Tenth People’s HospitalSchool of MedicineTongji UniversityShanghai 200092China Department of Biotechnology Faculty of Science and TechnologyUniversity of Central Punjab(UCP)Lahore 54000Pakistan Department of Cardiothoracic Surgery Hwa Mei HospitalUniversity of Chinese Academy of SciencesNingbo 315000China Ningbo Institute of Life and Health Industry University of Chinese Academy of SciencesNingbo 315000China

Tissue injury leads to gradients of chemoattractants,which drive multiple processes for tissue repair,including the inflam-matory response as well as endogenous cell ***,a limited time window for the gradients of chemoattract-ants as well as their poor stability at the injury site may not translate into healthy tissue ***,intelligent multifunctional scaffolds with the capability to stabilize injury-induced cytokines and chemokines hold great promise for tissue *** endothelial growth factor(VEGF)plays a significant role in wound healing by promoting *** overarching objective of this research was to develop intelligent multifunctional scaffolds with the capability to endogenously recruit VEGF and promote wound healing via angiogenic and immunomodulatory dual ***-1-derived peptide(PR1P)was encapsulated into electrospun poly(L-lactide-coglycolide)/gelatin(P/G)-based *** sustained release of PR1P recruited VEGF in situ,thereby stabilizing the protein concentration peak in vivo and affording a reparative microenvironment with an adequate angiogenic ability at the wound ***,PR1P-recruited VEGF-induced macrophage reprogramming towards M2-like phenotypes further conferred immunomodulatory functions to the *** dual functions of proangiogenesis and immunomodulation formed a cascade amplification,which regulated matrix metalloproteinases(MMP-9)as well as inflammatory factors(nuclear factor(NF)-κb,tumor necrosis factor(TNF)-α)in the wound microenvironment via the VEGF/macrophages/microenvironment ***,the bandages realized multifunctional regeneration in splinted excisional wounds in rats,with or without diabetes,affording a higher skin append-age neogenesis,sensory function,and collagen ***,our approach encompassing in situ recruitment of VEGF at the injury site with the capability to promote immunomodulation-mediated tissue repair affords a p

关键词： Skin regeneration Angiogenesis Immunomodulation Peptide Wound bandage Electrospun nanofiber

Correction:Vascular Endothelial Growth Factor‑Recruiting Nanofiber Bandages Promote Multifunctional Skin Regeneration via Improved Angiogenesis and Immunomodulation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advanced Fiber Materials 2024年第6期6卷 1999-2000页

作者： Chen, Yi Yuan, Zhengchao Sun, Weiyan Shafiq, Muhammad Zhu, Jun Chen, Jiafei Tang, Hai Hu, ling lin, weikang Zeng, Yanxi Wang, Long Zhang, Lei She, Yunlang Zheng, Hui Zhao, Guofang Xie, Dong Mo, Xiumei Chen, Chang Department of Thoracic Surgery Shanghai Pulmonary Hospital School of Medicine Tongji University Shanghai China Shanghai Engineering Research Center of Lung Transplantation Shanghai China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine College of Biological Science and Medical Engineering Donghua University Shanghai China Department of Chemical Engineering Faculty of Engineering Graduate School Kyushu University Fukuoka Japan Department of Biotechnology Faculty of Science and Technology University of Central Punjab (UCP) Lahore Pakistan Center for Life Science Tsinghua University Beijing China State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science Institutes of Brain Science Fudan University Shanghai China Department of Cardiology Shanghai Tenth People’s Hospital School of Medicine Tongji University Shanghai China Department of Cardiothoracic Surgery Hwa Mei Hospital University of Chinese Academy of Sciences Ningbo China Ningbo Institute of Life and Health Industry University of Chinese Academy of Sciences Ningbo China

In Fig. 5f in this article the authors missed a quantitative pseudocolor analysis picture and instead repeated a staining picture from Fig. 5e. The corrected Fig. 5 is as follows: (Figure presented.) P/G-PR1P bandages regulated collagen deposition in vivo. a–c Masson’s trichrome staining of full-length skin sections within the area of the splint at Day 14 (a) and Day 18 (b) (n = 6). Scale bar, 1 mm. c Magnified images of the wound centre. White arrows represent horizontally oriented collagen bundles, red arrows represent basket weave-like collagen networks, and red stars represent skin appendages. Scale bar, 200 μm. d‒i Analysis of the collagen arrangement. Representative images showing the collagen arrangement and pseudocolour images of the normal skin (d), wounds in the splinted only group (e), and wounds in the P/G-0.2 mg PR1P bandage-treated group (f). Scale bar, 200 μm. g Quantification of the length of horizontally oriented collagen bundles at Day 18 (n = 6). h Heatmap of collagen proportion in different directions at Day 18. i Quantification of the collagen I/III ratio at Day 18. *P © Donghua University, Shanghai, China 2024.

关键词：

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

R102钢低温再热器焊接接头裂纹分析

焊接 2005年第9期 51-54页

作者：葛兆祥林伟康王学江苏省电力科学研究院 210036 江苏常熟发电有限责任公司 215536 武汉大学动力与机械学院 430072

分析了R102钢低温再热器接头中裂纹特征、裂纹附近金相组织和硬度分布,分析结果表明,接头中裂纹性质为再热裂纹,在高温运行过程中粗晶区有沉淀强化相析出,它们所产生的晶内硬化效果是R102钢产生再热裂纹的重要原因。

关键词： R102钢接头裂纹再热器锅炉低温再热器裂纹分析焊接接头 102钢再热裂纹裂纹特征