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Single-scan polarization-resolved degenerate four-wave mixing spectroscopy using a vector optical field

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Photonics Research 2022年第1期10卷 230-236页

作者： JIAQI YUAN xuemei cheng XING WANG TENGFEI JIAO ZHAOYU REN State Key Laboratory of Photon-Technology in Western China Energy International Collaborative Center on Photoelectric Technology and Nano Functional MaterialsInstitute of Photonics&Photon-TechnologyNorthwest UniversityXi’an 710069China State Key Laboratory of Transient Optics and Photonics Chinese Academy of SciencesXi’an 710119China

We report on a new method to achieve the single-scan polarization-resolved degenerate four-wave mixing(DFWM)spectroscopy in a Rb atomic medium using a vector optical field,in which two pump beams are kept linearly polarized and a vector beam is employed as the probe *** the polarization and intensity of the DFWM signal are closely dependent on the polarization state of the probe beam,a vector probe beam with space-variant states of polarization is able to generate a DFWM signal with space-variant states of polarization and intensity across the DFWM ***,the polarization-resolved spectra can be retrieved from a single DFWM *** the best of our knowledge,this is the first time that the single-scan polarizationresolved spectrum detection has been realized experimentally with a vector *** work provides a simple but efficient single-scan polarization-resolved spectroscopic method,which would be of great utility for the samples of poor light stability and fast optical processes.

关键词： resolved mixing degenerate

Deformation behavior and fluid action of quartz veins in the Xuelongshan metamorphic complex,Western Yunnan

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中国科学:地球科学英文版 2023年第9期66卷 2011-2033页

作者： Shuting WANG Shuyun CAO Lefan ZHAN xuemei cheng Yanlong DONG Xiaowen LI Wenyuan LI State Key Laboratory of Geological Processes and Mineral Resources China University of GeosciencesWuhan 430074China

The Xuelongshan metamorphic complex underwent Cenozoic sinistral strike-slip shearing and exhumation from deep to shallow in the southeast margin of the Tibet *** studied the deformation behavior and fluid action of quartz veins in the metamorphic complex in depth based on macroscopic observation,electron backscatter diffraction fabric,and fluid inclusion *** mylonitic samples are characterized by strongly elongated and orientated porphyroclasts and a finegrained matrix with a shear strain of *** ultramylonitic samples are characterized by a strongly fine-grained matrix with a shear strain of ***{m}glide controls the quartz deformation in the mylonites and *** the dominant recovery mechanism,subgrain rotation dynamic recrystallization reduces the grain size and promotes rheological *** porphyroclasts restrict the crystal orientation of the recrystallized quartz *** mylonitic quartz veins have abundant single-phase and two-phase fluid ***,the ultramylonitic quartz veins have a few fluid inclusions,most of which are small and irregular toward the grain *** temperature and pressure of fluid activity in quartz veins are 550–500℃and 391–218 MPa for ultramylonitic quartz veins,with a depth of 14.2–7.9 km and 450–400℃and 236–91 MPa for mylonitic quartz veins,with a depth of 8.6–3.3 *** deformation process changes the shape of fluid inclusions from mylonitization to ultramylonitization and causes fluid leakage,an increase in local fluid pressure at the boundary,and hydrolysis weakening,promoting lattice dislocation glide and recrystallization,which is directly related to regional continuous shear deformation and exhumation.

关键词： Deformed quartz veins EBSD fabric Fluid Rheological weakening Exhumation process

和田地区鹅源致病性大肠杆菌的血清群、致病性与耐药性研究

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中国动物传染病学报 2024年第3期32卷 110-118页

作者：程雪梅肖海侠王芋丹王一霖白怡馨苏战强佟盼盼新疆农业大学动物医学学院乌鲁木齐830052

为了查明新疆和田地区鹅场发生的以腹泻为主要症状,以肝周炎和心包炎为主要病理变化的疾病是否由大肠杆菌引发,本研究无菌采集23份病死鹅内脏样本,采用常规细菌分离鉴定、PCR方法进行大肠杆菌鉴定,对分离菌的O血清群、致病性及耐药情况... 详细信息

为了查明新疆和田地区鹅场发生的以腹泻为主要症状,以肝周炎和心包炎为主要病理变化的疾病是否由大肠杆菌引发,本研究无菌采集23份病死鹅内脏样本,采用常规细菌分离鉴定、PCR方法进行大肠杆菌鉴定,对分离菌的O血清群、致病性及耐药情况进行分析。结果显示,共分离到23株大肠杆菌,血清群包括O18(21.74%)、O78(13.04%)、O2(8.70%)和O1(4.35%),12株(52.17%)血清群未明。主要携带的毒力基因包括irp2(95.65%)、iucD(73.91%)、fyuA(17.39%)和astA(8.70%),分离株对小鼠具有致病性。23株大肠杆菌对四环素的耐药率为100%,氯霉素、环丙沙星、氨苄西林、左氧氟沙星、哌拉西林、复方新诺明、链霉素和头孢噻肟的耐药率在60.87%~95.65%,对多黏菌素B均敏感。共检测出12种耐药基因,tetA、tetG、cml 1、bla_(TEM)、sul1、aac、bla_(CTX-M-1)的检出率在43.48%以上,bla SHV、bla_(CTX-M-9)、tetE、aadA1的检出率在4.35%~30.43%,未检到bla CTX-M-2。本研究确定和田地区鹅场腹泻、肝周炎和心包炎为大肠杆菌感染所致,血清型较为复杂,耐药性严重。

关键词：腹泻大肠杆菌血清群致病性耐药性

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合并心脏传导阻滞的超高龄患者腮腺恶性肿瘤切除术的麻醉与围术期管理

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中华麻醉学杂志 2024年第3期44卷 358-360页

作者：程雪梅张利东贾慧群郑晖杨旭东曹罡尹春琳田子强王古岩薛张纲王天龙解放军东部战区总医院麻醉科南京210002 河北医科大学第四医院麻醉科石家庄050000 中国医学科学院肿瘤医院麻醉科北京100021 北京大学口腔医院麻醉科北京100081 解放军东部战区总医院口腔科南京210002 首都医科大学宣武医院心血管内科北京100053 河北医科大学第四医院胸外科石家庄050000 首都医科大学附属北京同仁医院麻醉科北京100730 复旦大学附属中山医院麻醉科上海200032 首都医科大学宣武医院麻醉手术科北京100053

一、病例介绍1.病史摘要(1)一般情况:患者女性,年龄91岁,身高155 cm,体质量46 kg。因"右面部无痛性渐大肿物1年余,伴溃疡半年"入院。1年前偶然发现右侧颧面部及耳屏前部有一"鹌鹑蛋"大小包块,无明显疼痛不适,后包块逐渐增大并溃疡,期间... 详细信息

一、病例介绍1.病史摘要(1)一般情况:患者女性,年龄91岁,身高155 cm,体质量46 kg。因"右面部无痛性渐大肿物1年余,伴溃疡半年"入院。1年前偶然发现右侧颧面部及耳屏前部有一"鹌鹑蛋"大小包块,无明显疼痛不适,后包块逐渐增大并溃疡,期间未做任何处理,症状无明显好转,为进一步救治收入我院。

关键词：心脏传导阻滞病史摘要围术期管理超高龄患者鹌鹑蛋切除术无痛性腮腺恶性肿瘤

BrrTCP4b interacts with BrrTTG1 to suppress the development of trichomes in Brassica rapa var. rapa

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Plant Diversity 2024年第3期46卷 416-420页

作者： cheng Li Li Zhang Hefan Li Yuanwen Duan xuemei Wen Yongping Yang Xudong Sun The Germplasm Bank of Wild Species Yunnan Key Laboratory of Crop Wild Relatives OmicsInstitute of Tibetan Plateau Research at KunmingKunming Institute of BotanyChinese Academy of SciencesKunming 650201China University of Chinese Academy of Sciences BeijingChina Tibet Plateau Institute of Biology Lhasa 850001TibetChina

The number of trichomes significantly increased in CRISPR/Cas9-edited BrrTCP4b turnip(Brassica rapa ***)***,the underlying molecular mechanism remains to be *** this study,we performed the Y2H screen using BrrTCP4b as the bait,which unveiled an interaction between BrrTCP4b and BrrTTG1,a pivotal WD40-repeat protein transcription factor in the MYB-bHLH-WD40(MBW)*** physical interaction was further validated through bimolecular luciferase complementation and ***,it was found that the interaction between BrrTCP4b and BrrTTG1 could inhibit the activity of MBW complex,resulting in decreased expression of BrrGL2,a positive regulator of trichomes *** contrast,AtTCP4 is known to regulate trichomes development by interacting with AtGL3 in Arabidopsis ***,this study revealed that BrrTCP4b is involved in trichome development by interacting with BrrTTG1 in turnip,indicating a divergence from the mechanisms observed in model plant *** findings contribute to our understanding of the regulatory mechanisms governing trichome development in the non-model plants turnip.

关键词： TCP transcription factor MBW complex Trichome development Turnip

Grain-size reduction of feldspar and flow of deformed granites within the Gaoligong shear zone, southwestern Yunnan, China

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Science China Earth Sciences 2019年第9期62卷 1379-1398页

作者： Yanlong DONG Shuyun CAO xuemei cheng Junlai LIU Hanchen CAO State Key Laboratory of Geological Processes and Mineral Resources School of Earth Sciences China University of Geosciences Wuhan 430074 China State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Beijing 100083 China

Mineral deformation and rock flow mechanism in the lithosphere are related to the rheological behavior and weakening mechanism of the continent. Natural deformation behaviors of feldspars are not well understood due to the complexity of their mineral compositions, crystal structures, as well as changing deformation conditions. The refined microstructure,fabric and composition of major minerals in the deformed granitic rocks within the Gaoligong shear zone(GLGSZ), southwestern Yunnan, China, were studied. With increasing mylonitization, two fabric types of end-members have been distinguished(type-I banded granitic mylonite and type-II banded ultramylonite). The two types of deformed granitic rocks have the same mineral assemblage, but different mineral modes. The type-I banded granitic mylonite has a greater proportion of K-feldspar(mostly present as porphyroclasts)>plagioclase>quartz±biotite, however, the type-II banded ultramylonite has a greater proportion of fine-grained plagioclase>K-feldspar>quartz±biotite. The crystallographic preferred orientation(CPO) patterns of quartz combined with two-feldspar geothermometer, confirm that the quartz grains in the type-I and type-II granitic rock have undergone high-temperature dislocation creep deformation. The K-feldspar grains in the matrix of type-II banded ultramylonite show a dominant(100)[010] slip system with dislocation creep recrystallization, while the fine-grained plagioclase grains present a weak CPO pattern with superplastic flow. The K-feldspar porphyroclasts show grain-size reduction associated with mineral composition and fabric transformation. The myrmekite formation with the fine-grained neocrystallization of plagioclase and quartz significally replaced the K-feldspar porphyroclasts. Finally, the fine-grained neocrystallization plagioclases were formed further into the high strain localized ultramylonites with superplastic flow.

关键词： Feldspar Grain-size reduction EBSD fabric Fluid Myrmekite Mylonite Ultramylonite

Neuromorphic circuits based on memristors: endowing robots with a human-like brain

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Journal of Semiconductors 2024年第6期45卷 47-63页

作者： xuemei Wang Fan Yang Qing Liu Zien Zhang Zhixing Wen Jiangang Chen Qirui Zhang cheng Wang Ge Wang Fucai Liu School of Optoelectronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 610054China Yangtze Delta Region Institute(Huzhou) University of Electronic Science and Technology of ChinaHuzhou 313099China

Robots are widely used,providing significant convenience in daily life and *** the rapid development of artificial intelligence and neuromorphic computing in recent years,the realization of more intelligent robots through a pro-found intersection of neuroscience and robotics has received much *** circuits based on memristors used to construct hardware neural networks have proved to be a promising solution of shattering traditional control limita-tions in the field of robot control,showcasing characteristics that enhance robot intelligence,speed,and energy ***-ing with introducing the working mechanism of memristors and peripheral circuit design,this review gives a comprehensive analysis on the biomimetic information processing and biomimetic driving operations achieved through the utilization of neuro-morphic circuits in brain-like *** hardware neural network approaches,including digital-analog hybrid circuit design,novel device structure design,multi-regulation mechanism,and crossbar array,are summarized,which can well simulate the motor decision-making mechanism,multi-information integration and parallel control of brain at the hardware *** will be definitely conductive to promote the application of memristor-based neuromorphic circuits in areas such as intelligent robotics,artificial intelligence,and neural ***,a conclusion and future prospects are discussed.

关键词： neuromorphic devices neuromorphic circuits hardware networks memristors humanlike robots

Deformation structure and exhumation process of the Laojunshan gneiss dome in southeastern Yunnan of China

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Science China Earth Sciences 2021年第12期64卷 2190-2216页

作者： Zhong LIU Shuyun CAO Yanlong DONG Wei LI xuemei cheng Haobo WANG Meixia LYU State Key Laboratory of Geological Processes and Mineral Resources School of Earth SciencesChina University of GeosciencesWuhan430074China

Middle-lower crust and mantle rocks are generally widely exposed in metamorphic core complex or gneiss dome,which is an ideal place to study the exhumation process related to regional extension and *** Laojunshan metamorphic complex in southeastern Yunnan is located in a special tectonic position surrounded by the Cathaysia,Yangtze and Indochina *** is composed of different metamorphic-deformation rocks and granitic *** also are many economic deposits(e.g.,tin and tungsten)that are spatially and genetically associated with the formation and exhumation of the Laojunshan gneiss *** on detailed analysis of macro-and microscopic structure,stress field distribution and deformation condition,the tectonic units of the Laojunshan metamorphic complex show obvious characteristics of doming,as well as of typical structural units of metamorphic core *** has strongly deformed metamorphic gneiss core(footwall),detachment fault system and sedimentary cover(hanging wall)with lightly metamorphism and *** footwall of gneiss dome presents a strongly ductile deformation domain,accompanied by different ages of granitic *** distribution of developed foliation and lineation within granitic gneisses are arc-shaped and radial,respectively,with a nearly N-S trending from the footwall to the hanging *** of deformed rocks gradually weakens and transits to orthogneiss as it moves away from the detachment fault toward the *** low angle detachment fault between the footwall and the hanging wall shows an arc-like shape *** fabrics are preserved in the deformed rocks of the detachment fault,which are mainly composed of chloritized schist,fault breccia,cataclasite and fault gouge.A large number of normal faults are developed in detachment faults and hanging wall,and their stress fields radiate in an arc around the *** U-Pb ages of amphibolite and granitic gneiss from the footwall range

关键词： Gneiss dome Inversion of stress field EBSD texture Zircon U/Pb geochronology Caledonian movement in South China

Stimulated Brillouin scattering induced all-optical modulation in graphene microfiber

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Photonics Research 2019年第1期7卷 8-13页

作者： JIWEN ZHU xuemei cheng YALI LIU RUIDUO WANG MAN JIANG DIAO LI BAOLE LU ZHAOYU REN State Key Lab Incubation Base of Photoelectric Technology and Functional Materials National Photoelectric Technology and Functional Materials& Application International Cooperation Center Institute of Photonics & Photon-Technology Northwest University

Graphene microfibers are burgeoning modulators with great potential in all-optical communication. One of the critical issues that remains to be understood is the dynamic mechanism of light–graphene interaction. Here, we propose a power dependent modulation by using 980 nm pump light and 1064 nm signal light via graphene microfiber, and the results show a strong transmission reduction and frequency blue shift with the increase of pump power. The experimental observation is attributed to a stimulated Brillouin scattering process induced by the pump light. Power and frequency variations are a result of energy transition of the scattered phonon in the fiber. This work reveals the nonlinear effect process in the light–graphene interaction and provides a new method for power and frequency control with graphene all-optical modulation.

关键词： Graphene microfibers burgeoning modulators great potential