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Polarization flipping of Even-Order Harmonics in Monolayer Transition-Metal Dichalcogenides

Ultrafast Science 2021年第1期1卷 39-47页

作者： Yuki Kobayashi Christian Heide Hamed Koochaki Kelardeh Amalya Johnson fang Liu tony f.heinz David A.Reis Shambhu Ghimire Stanford PULSE Institute SLAC National Accelerator LaboratoryMenlo ParkCA 94025USA Department of Applied Physics Stanford UniversityStanfordCA 94305USA Max Planck Institute for the Physics of Complex Systems Nöthnitzer Str.3801187 DresdenGermany Department of Materials Science and Engineering Stanford UniversityStanfordCA 94305USA Department of Chemistry Stanford UniversityStanfordCA 94305USA Department of Photon Science Stanford UniversityStanfordCA 94305USA

We present a systematic study of the crystal-orientation dependence of high-harmonic generation in monolayer transition-metal dichalcogenides,WS2 and MoSe2,subjected to intense linearly polarized midinfrared laser *** measured spectra consist of both odd-and even-order harmonics,with a high-energy cutoff extending beyond the 15th order for a laser-field strength around~1 V/*** WS2,we find that the polarization direction of the odd-order harmonics smoothly follows that of the laser field irrespective of the crystal orientation,whereas the direction of the even-order harmonics is fixed by the crystal mirror ***,the polarization of the even-order harmonics shows a flip in the course of crystal rotation when the laser field lies between two of the crystal mirror *** numerically solving the semiconductor Bloch equations for a gapped-graphene model,we qualitatively reproduce these experimental features and find the polarization flipping to be associated with a significant contribution from interband *** contrast,high-harmonic signals from MoSe2 exhibit deviations from the laser-field following of oddorder harmonics and crystal-mirror-plane following of even-order *** attribute these differences to the competing roles of the intraband and interband contributions,including the deflection of the electron-hole trajectories by nonparabolic crystal bands.

关键词： polarization harmonics mirror

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Evolution of the Raman spectrum of graphene grown on copper upon oxidation of the substrate

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Nano Research 2014年第11期7卷 1613-1622页

作者： XiuliYin Yilei Li fen Ke Chenfang Lin Huabo Zhao Lin Gan Zhengtang Luo Ruguang Zhao tony f. heinz Zonghai Hu State Key Laboratory for Artificial Microstructures and Mesoscopic Physics School of Physics Peking University Beijing 100871 China Collaborative Innovation Center for Quantum Matter Beijing China Departments of Physics and Electrical Engineering Columbia University New York NY 10027 USA Department of Chemical and Biomolecular Engineering Hang Kong University of Science and Technology Kowloon Hang Kong China

在在一部铜电影上种的单个层的 graphene 的拉曼光谱的重要变化在发生在周围的条件下面的内在的底层的自发的氧化以后被观察。graphene G 和 2D 拉曼模式的频率被发现经历红移动，当二个乐队的紧张由超过一个数量级变化时。为了理解这... 详细信息

在在一部铜电影上种的单个层的 graphene 的拉曼光谱的重要变化在发生在周围的条件下面的内在的底层的自发的氧化以后被观察。graphene G 和 2D 拉曼模式的频率被发现经历红移动，当二个乐队的紧张由超过一个数量级变化时。为了理解这些的起源，完成，我们进一步由扫描通道描绘了样品显微镜学(STM ) ，扫描通道光谱学(圣) ，和原子力量显微镜学(AfM ) 。没有破坏 graphene overlayer 的水晶的顺序或改变做水平的搬运人，底层的氧化在底层生产了可估计的折皱。我们以 graphene 层的折皱导致的张力的紧张解释拉曼频率的红移动。在有氧化的拉曼紧张的变化从对在散布过程的拉曼结合 graphene 层的光的效率的薄亚铜的氧化物电影的影响产生。

关键词：氧化石墨拉曼光谱生长扫描隧道显微镜演化铜基原子力显微镜氧化亚铜薄膜

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Matching while Learning: Wireless Scheduling for Age of Information Optimization at the Edge

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China Communications 2023年第3期20卷 347-360页

作者： Kun Guo Hao Yang Peng Yang Wei feng tony Q.S.Quek School of Communications and Electronics Engineering East China Normal UniversityShanghai 200241China Chongqing Key Laboratory of Precision Optics Chongqing Institute of East China Normal UniversityChongqing 401120China Zhejiang University/University of Illinois at Urbana-Champaign Institute Zhejiang UniversityHaining 314400China School of Electronic and Information Engineering Beihang UniversityBeijing 100083China Beijing National Research Center for Information Science and Technology Department of Electronic EngineeringTsinghua UniversityBeijing 100084China Information Systems Technology and Design(ISTD)Pillar Singapore University of Technology and DesignSingapore 487372

In this paper,we investigate the minimization of age of information(AoI),a metric that measures the information freshness,at the network edge with unreliable wireless ***,we consider a set of users transmitting status updates,which are collected by the user randomly over time,to an edge server through unreliable orthogonal *** begs a natural question:with random status update arrivals and obscure channel conditions,can we devise an intelligent scheduling policy that matches the users and channels to stabilize the queues of all users while minimizing the average AoI?To give an adequate answer,we define a bipartite graph and formulate a dynamic edge activation problem with stability ***,we propose an online matching while learning algorithm(MatL)and discuss its implementation for wireless ***,simulation results demonstrate that the MatL is reliable to learn the channel states and manage the users’buffers for fresher information at the edge.

关键词： information freshness Lyapunov opti-mization multi-armed bandit wireless scheduling

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Time-dependent reliability analysis for repairable consecutive-k-out-of-n:f system

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Statistical Theory and Related fields 2022年第2期6卷 139-147页

作者： Gökhan Gökdere Hon Keung tony Ng Department of Statistics Faculty of ScienceFırat UniversityElazıgTurkey Department of Statistical Science Southern Methodist UniversityDallasTXUSA

In a repairable consecutive C(k,n:f)system,after the system operates for a certain time,some components may fail,some failed components may be repaired and the state of the system may *** models developed in the existing literature usually assume that the state of the sys-tem varies over time depending on the values of n and k and the state of the system is *** the system reliability will vary over time,it is of great interest to analyse the time-dependent system *** this paper,we develop a novel and simple method that utilizes the eigen-values of the transition rate matrix of the system for the computation of time-dependent system reliability when the system state is *** addition,the transition performance probabilities of the system from a known state to the possible states are also *** results are presented to illustrate the applicability and accuracy of the proposed method.

关键词： Repairable consecutive-k-out-of-n:f system transition rate matrix time-dependent reliability time-dependent transition performance probability

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兔耳动脉的交感性血管收缩对α肾上腺素能受体拮抗剂的部分阻抗(英文)

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中国药理学与毒理学杂志 1992年第1期6卷 14-18页

作者： tony J-f LEE Department of Pharmacology Southern Illinois University School of Medicine Springfield Illinois 62794-9230 USA

本文利用离体组织灌流技术,对刺激家兔颈上神经节内壁交感神经引起兔耳中央动脉收缩的本质进行探讨,α受体拮抗剂仅部分阻断跨壁神经刺激(TNS)引起的收缩,若预先使用利血平耗竭离体血管内源性儿茶酚胺,由TNS引起的此种家兔耳中央动脉收... 详细信息

本文利用离体组织灌流技术,对刺激家兔颈上神经节内壁交感神经引起兔耳中央动脉收缩的本质进行探讨,α受体拮抗剂仅部分阻断跨壁神经刺激(TNS)引起的收缩,若预先使用利血平耗竭离体血管内源性儿茶酚胺,由TNS引起的此种家兔耳中央动脉收缩则明显减弱,与此同时,α受体拮抗剂却增强了后期(residual)收缩反应,这种增强作用可能是因突触前膜α受体同时被阻断而引起,由此可见,交感神经冲动引起的家兔耳中央动脉收缩绝大部分是由去甲肾上腺素(NE)介导的,但后期收缩反应则可能是由另一种不明递质所介导,而这种属于外周循环系统的耳动脉交感神经与血管之间冲动传递方式又有别于大脑动脉的传递方式。

关键词：耳动脉 α肾上腺素能受体拮抗剂

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Spectrum of NSD1 gene mutations in southern Chinese patients with Sotos syndrome

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Chinese Medical Journal 2005年第18期118卷 1499-1506页

作者： tony M.f. Tong Edgar W.L. Hau Ivan f.M. Lo Daniel H.C. Chan Stephen T.S. Lam Clinical Genetic Service Department of Health Hong Kong SAR China Clinical Genetic Service Department of Health Hong Kong SAR China Clinical Genetic Service Department of Health Hong Kong SAR China Clinical Genetic Service Department of Health Hong Kong SAR China Clinical Genetic Service Department of Health Hong Kong SAR China

Background Sotos syndrome is an overgrowth syndrome with characteristic facial gestalt and mental retardation of variable severity. Haploinsufficiency of the NSD 1 gene has been implicated as the major cause of Sotos syndrome, with a predominance of microdeletions reported in Japanese patients. This study was conducted to investigate into the spectrum of NSD1 gene mutations in southern Chinese patients with Sotos syndrome. Methods Thirty-six Chinese patients with Sotos syndrome and two patients with Weaver syndrome were subject to molecular testing. Results NSD1 gene mutations were detected in 26 （72%） Sotos patients. Microdeletion was found in only 3 patients, while the other 23 had point mutations （6 frameshift, 8 nonsense, 2 spice site, and 7 missense）. Of these, 19 mutations were never reported. NSD1 gene mutations were not found in the two patients with Weaver syndrome. Conclusions Most cases of Sotos syndrome are caused by NSD1 gene defects, but the spectrum of mutations is different from that of Japanese patients. Genotype-phenotype correlation showed that patients with microdeletions might be more prone to congenital heart disease but less likely to have somatic overgrowth. The two patients with Weaver syndrome were not found to have NSD1 gene mutations, but the number was too small for any conclusion to be drawn.

关键词： Sotos syndrome·Weaver syndrome·NSD1 gene mutation

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猫大脑动脉的胆碱能性血管收缩(英文)

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中国药理学与毒理学杂志 1992年第1期6卷 19-27页

作者： Matthew D LINNIK tony J-f LEE Department of Pharmacology Southern Illinois University School of Medicine Springfield Illinois 62794 9230 USADepartment of Pharmacology Southern Illinois University School of Medicine Springfield Illinois 62794 9230 USA

本文对猫脑动脉的胆碱能神经冲动传递的离体研究结果进行如下两方面的探讨:1)在乙酰胆碱亚舒张浓度下的反应;2)在阿托品敏感性神经源性血管舒张的可能性上的争议. 观察结果表明,55％的脑动脉血管条对0.1～3nmol·L^(-1)浓度的乙酰胆碱(A... 详细信息

本文对猫脑动脉的胆碱能神经冲动传递的离体研究结果进行如下两方面的探讨:1)在乙酰胆碱亚舒张浓度下的反应;2)在阿托品敏感性神经源性血管舒张的可能性上的争议. 观察结果表明,55％的脑动脉血管条对0.1～3nmol·L^(-1)浓度的乙酰胆碱(ACh)产生了收缩反应,高于上述浓度的乙酰胆碱引起了血管内皮依赖性的舒张反应.进一步提高乙酰胆碱浓度则导致直接的血管平滑肌的收缩反应,0.1～3 nmol·L^(-1)亚舒张浓度乙酰胆碱引起的血管收缩反应以及高于此浓度乙酰胆碱所致的血管内皮依赖性舒张反应仅发生干预先已收缩而有张力的脑血管,亚舒张浓度乙酰胆碱(0.1～3nmol·L^(-1))所致的收缩反应并不依赖于血管内皮的存在,在Krebs溶液4℃条件下保存5d的同样脑血管对亚舒张浓度乙酰胆碱(0.1～3nmol·L^(-1))所致的收缩反应频率下降至13％,但血管内皮依赖性舒张反应或直接的血管平滑肌收缩反应在如此条件下保存的脑血管上依然完好. 以上结果与乙酰胆碱作为脑血管神经末梢递质导致神经源性血管舒张的假说是不相符合的。

关键词：脑动脉毒蕈碱能受体拮抗剂

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Identification of naphthalene metabolism by white rot fungus Armillaria sp.f022

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Journal of Environmental Sciences 2012年第4期24卷 728-732页

作者： tony Hadibarata Abdull Rahim Mohd Yusoff Azmi Aris Risky Ayu Kristanti Institute of Environmental and Water Resources Management Universiti Teknologi Malaysia81310 SkudaiJohorMalaysia Department of Chemical and Environmental Engineering.Yamanashi University 4-4-37 TakedaKofuYamanashi400-8510 Japan

Armillaria sp. f022, a white rot fungus isolated from tropical rain forest （Samarinda, Indonesia） was used to biodegrade naphthalene in cultured medium. Transformation of naphthalene by Armillaria sp. f022 which is able to use naphthalene, a two ring-polycyclic aromatic hydrocarbon （PAH） as a source of carbon and energy was investigated. The metabolic pathway was elucidated by identifying metabolites, biotransformation studies and monitoring enzyme activities in cell-free extracts. The identification of metabolites suggests that Armillaria sp. f022 initiates its attack on naphthalene by dioxygenation at its C-1 and C-4 positions to give 1,4-naphthoquinone. The intermediate 2-hydroxybenzaldebyde and salicylic acid, and the characteristic of the meta-cleavage of the resulting diol were identified in the long-term incubation. A part from typical metabolites of naphthalene degradation known from mesophiles, benzoic acid was identified as the next intermediate for the naphthalene pathway of this Armillaria sp. f022. Neither phthalic acid, catechol and cis, cis-muconic acid metabolites were detected in culture extracts. Several enzymes （manganese peroxidase, lignin peroxidase, laccase, 1,2-dioxygenase and 2,3-dioxygenase） produced by ArmiUaria sp. f022 were detected during the incubation.

关键词： Armillaria sp. f022 dioxygenase enzymes ligninolytic enzymes naphthalene metabolites 1,4-naphthaquinone

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大脑血管内胆碱乙酰转移酶免疫反应活性(英文)

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中国药理学与毒理学杂志 1992年第1期6卷 28-35页

作者： Jun-Ge YU Jang-Yen WU tony J-f LEE Department of Pharmacology Southern Illinois University School of Medicine Springfield Illinois 62794-19230 USADepartment of Pharmacology Southern Illinois University School of Medicine Springfield Illinois 62794-19230 USADepartment of Pharmacology Southern Illinois University School of Medicine Springfield Illinois 62794-19230 USA

本文采用间接免疫荧光染色(双抗体法)和非标记抗体-过氧化物酶-抗过氧化物酶法(PAP法),使用抗纯化胆碱乙酰转移酶(CHAT)抗体,对猫和猪各种体积的脑软膜动静脉,脑实质内微血管以及脉络丛的乙酰胆碱能神经的存在和分布进行了研究。结果表... 详细信息

本文采用间接免疫荧光染色(双抗体法)和非标记抗体-过氧化物酶-抗过氧化物酶法(PAP法),使用抗纯化胆碱乙酰转移酶(CHAT)抗体,对猫和猪各种体积的脑软膜动静脉,脑实质内微血管以及脉络丛的乙酰胆碱能神经的存在和分布进行了研究。结果表明,脑软膜动静脉的ChAT免疫反应性神经主要是成束状的,只有少数是由细小纤维组成,静脉的此类神经供应少于其动脉供应程度,同时,ChAT免疫反应纤维的密度又与血管的体积成比例,在小分枝的动静脉上(外径小于30μm)通常观察不到此类纤维的存在,脉络丛的动静脉有ChAT免疫反应性神经存在,但此类神经在实质内微血管则观察不到,以上结果与以前报告过的颅内和实质外动脉的乙酰胆碱酯酶(AChE)性纤维的密度比同类静脉所存在密度大的结果相符,而ChAT免疫反应纤维分布的方式则与报告过的AChE性纤维的分布方式不同,后者主要是由细小纤维组成,尽管离体的实质内微血管无ChAT免疫反应纤维,但胆碱能神经接近和“突触化”此类微血管的可能性不能排除,脑软膜血管一些内皮细胞胞浆内也有ChAT免疫反应活性存在,因此,本文结果与神经元和血管内皮两者的胆碱能机构在控制脑循环中起着重要作用之假说相一致。

关键词：胆碱乙酰转移酶胆碱能神经支配

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Chrysanthemum indicum ethanol extract attenuates hepatic stellate cell activation in vitro and thioacetamide-induced hepatofibrosis in rats

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Asian Pacific Journal of Tropical Biomedicine 2021年第11期11卷 500-509页

作者： Yun-Jin Chae Sushruta Koppula Myong-Ki Kim tony Yoon MinDong Song Department of Applied Life Science Graduate School of Konkuk University268 Chungwon-daeroChungju-siChungbuk27478Republic of Korea Department of Biotechnology College of Biomedical and Health SciencesKonkuk University268 Chungwon-daeroChungju-siChungbuk27478Republic of Korea Research Institute and College of Biomedical&Health Science Konkuk University268 Chungwon-daeroChungju-siChungbuk27478Republic of Korea Scholar foxtrot Co. LTD501SinGwan-dong 5FJongam-ro 36-gilSeongbuk-guSeoul02796Republic of Korea Department of food Science and Engineering Seowon UniversityCheongjuChungbuk 28674Republic of Korea food One Corp 127Sincheoksandan 5-roDeoksan-eupJincheon-gunChungbuk 27850Republic of Korea

Objective:To investigate the antifibrotic effects of Chrysanthemum indicum ethanol extract(CIEE)against activated hepatic stellate cells(HSC)and thioacetamide(TAA)-induced hepatofibrosis in ***:Cell viability and proliferation of HSC-T6 cells were measured using MTT *** HSCs were used to study ***(200 mg/kg)was used to induced hepatic fibrosis in ***(100 and 500 mg/kg)and silymarin(50 mg/kg)were administered *** functions including alanine transaminase,aspartate transaminase,glutathione,and hydroxyproline levels were measured using commercial *** sections and fibrotic biomarker expression were measured using hematoxylin and eosin staining and real-time polymerase chain ***:In vitro study revealed that CIEE(0.1,0.25,and 0.5 mg/mL)inhibited the proliferation of activated HSCs exposed to transforming growth factor(TGf)-β and restored the activated primary HSC *** in vivo studies,TAA-induced increase in liver/body weight ratio(5.46±0.26)was significantly reduced(4.13±0.22)by CIEE(Pfunctions by significantly attenuating changes in alanine transaminase,aspartate transaminase,glutathione,and hydroxyproline levels(Pfurther,CIEE(100 and 500 mg/kg)ameliorated the histological changes in liver tissue and TGf-β expression significantly(Pficantly protects against TAA-induced liver damage in rats and can be used in the treatment of liver fibrosis.

关键词： Chrysanthemum indicum fibrosis Hepatoprotective Hydroxyproline Thioacetamide

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