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A continuous-wave Nd:YVO_(4)-KGW intracavity Raman laser with over 34% diode-to-Stokes optical efficiency

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High Power Laser Science and Engineering 2024年第2期12卷 62-68页

作者： quan Sheng Jingni Geng Tianchang Liu Shijie fu Wei Shi Jianquan Yao Institute of Laser and Optoelectronics School of Precision Instrument and Optoelectronics EngineeringTianjin UniversityTianjinChina Key Laboratory of Optoelectronic Information Technology(Ministry of Education) Tianjin UniversityTianjinChina

We demonstrate a continuous-wave(CW)Nd:YVO_(4)-potassium gadolinium tungstate(KGW)intracavity Raman laser with a diode-to-Stokes optical efficiency of 34.2%.By optimizing the cavity arrangement and reducing the cavity losses,8.47 W Stokes output at 1177 nm was obtained under an incident 878.6 nm diode pump power of 24.8 *** influence of cavity losses on the power and efficiency of the CW Raman laser,as well as the potential for further optimization,was investigated based on the numerical *** observation of thermally-induced output rollover was well explained by the calculation of the thermal lensing and cavity stability,indicating that the end-face curvature played an important role when the end-face of the crystal was highly reflective coated to make the cavity.A 10.9 W Stokes output under 40.9 W incident pump was also demonstrated with a cavity arrangement less sensitive to the end-face curvature,which is the highest output power of CW intracavity Raman lasers reported.

关键词： continuous wave intracavity Raman laser KGW crystal thermal lens

A simple method to use the preformed nasotracheal tube during the lightwand-guided awake nasal intubation in the patients with difficult airways

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Chinese Medical Journal 2009年第5期122卷 599-600页

作者： XUE fu-shan yang quan-yong XU Ya-chao LIAO Xu Department of Anesthesiology Plastic Surgery Hospital Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100144 China

To the Editor： Management of a difficult airway remains one of the major challenges to the anesthetists in clinical ***-guided nasal intubation has been shown to be a useful technique in the patients with known difficult *** the preformed nasotracheal tubes （PNTs） are commonly selected for nasal intubation in the patients undergoing head and neck surgery because they are easy to secure,

关键词： TRACHEAL INTUBATION ANESTHESIA

Numerical and experimental study of the effects of wind turbine operation on sand-dust transport characteristics

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Science China(Physics,Mechanics & Astronomy) 2024年第4期67卷 97-113页

作者： Gaosheng Ma Hong Han Ye Li Deshun Li Yan Wang Ning fu quan Zheng Rennian Li School of Energy and Power Engineering Lanzhou University of TechnologyLanzhou 730050China Gansu Provincial Technology Center for Wind Turbines Lanzhou 730050China Key Laboratory of Fluid Machinery and Systems Lanzhou 730050China Multiple function Towing Tank Laboratory State Key Laboratory of Ocean EngineeringSchool of Naval ArchitectureOcean and Civil EngineeringShanghai Jiao Tong UniversityShanghai 200240China

Given factors such as reduced land availability for onshore wind farms,wind resource enrichment levels,and costs,there is a growing trend of establishing wind farms in deserts,the Gobi,and other arid ***,the relationship between sanddust weather environments and wind turbine operations has garnered significant *** investigate the impact of wind turbine wakes on sand-dust transportation,this study employs large eddy simulation to model flow fields,coupled with an actuator line model for simulating rotating blades and a multiphase particle in cell model for simulating sand *** research focuses on a horizontal axis wind turbine model and examines the motion and spatiotemporal distribution characteristics of four typical sizes of sand particles in the turbine *** findings reveal that sand particles of varying sizes exhibit a spiral settling pattern after traversing the rotating plane of wind turbine blades,influenced by blade shedding vortex and *** particles tend to cluster in the peripheries of the vortex cores of low vorticity in the wind turbine *** rotation of wind turbines generates a wake vortex structure that causes a significant clustering of sand particles at the tip *** the wake distance increases,the particles that cluster at the turbine's tip gradually spread outward to approximately twice the rotor diameter and then begin to mix with the incoming flow *** turbines have a noticeable impact on sand-dust transportation,hindering their movement to a significant *** average sand-blocking rate exhibits a trend of initially increasing and then decreasing as the wake distance *** its peak,the sand-blocking rate reaches an impressive 67.55%.The presence of wind turbines induces the advanced settling of sand particles,resulting in a“triangular”distribution of the deposition within the ground projection area of the wake.

关键词： wind turbine particle transportation actuator line model dry deposition particle clustering

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Endoscopic features and treatments of gastric cystica profunda

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World Journal of Gastroenterology 2024年第7期30卷 673-684页

作者： Zi-Han Geng Yan Zhu Pei-Yao fu Yi-Fan Qu Wei-Feng Chen Xia yang Ping-Hong Zhou quan-Lin Li Endoscopy Center and Endoscopy Research Institute Zhongshan HospitalFudan UniversityShanghai 200032China

BACKGROUND Gastric cystica profunda(GCP)represents a rare condition characterized by cystic dilation of gastric glands within the mucosal and/or submucosal *** is often linked to,or may progress into,early gastric cancer(EGC).AIM To provide a comprehensive evaluation of the endoscopic features of GCP while assessing the efficacy of endoscopic treatment,thereby offering guidance for diagnosis and *** This retrospective study involved 104 patients with GCP who underwent endoscopic *** demographic and clinical data,regular patient followups were conducted to assess local *** Among the 104 patients diagnosed with GCP who underwent endoscopic resection,12.5%had a history of previous gastric *** primary site predominantly affected was the cardia(38.5%,n=40).GCP commonly exhibited intraluminal growth(99%),regular presentation(74.0%),and ulcerative mucosa(61.5%).The leading endoscopic feature was the mucosal lesion type(59.6%,n=62).The average maximum diameter was 20.9±15.3 mm,with mucosal involvement in 60.6%(n=63).Procedures lasted 73.9±57.5 min,achieving complete resection in 91.3%(n=95).Recurrence(4.8%)was managed via either surgical intervention(n=1)or through endoscopic resection(n=4).Final pathology confirmed that 59.6%of GCP cases were associated with *** analysis indicated that elderly males were more susceptible to GCP associated with ***,multivariate analysis identified lesion morphology and endoscopic features as significant risk *** analysis demonstrated no statistically significant difference in recurrence between GCP with and without EGC(P=0.72).CONCLUSION The findings suggested that endoscopic resection might serve as an effective and minimally invasive treatment for GCP with or without EGC.

关键词： Gastric cystica profunda Early gastric cancer Endoscopic features Endoscopic resection Endoscopy

Analysis of mechanical strengths of extreme line casing joint considering geometric, material, and contact nonlinearities

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Petroleum Science 2024年第3期21卷 1992-2004页

作者： Ji-Yun Zhang Chi Peng Jian-Hong fu quan Cao Yu Su Jian-Yun Pang Zi-Qiang Yu Petroleum Engineering School Southwest Petroleum University Engineering Technology Research Institute of CNPC Southwest Oil and Gas Field Company

To address the challenges associated with difficult casing running, limited annular space, and poor cementing quality in the completion of ultra-deep wells, the extreme line casing offers an effective solution over conventional casings. However, due to its smaller size, the joint strength of extreme line casing is reduced, which may cause failure when running in the hole. To address this issue, this study focuses on the CST-ZT Φ139.7 mm × 7.72 mm extreme line casing and employs the elastic-plastic mechanics to establish a comprehensive analysis of the casing joint, taking into account the influence of geometric and material nonlinearities. A finite element model is developed to analyze the forces and deformations of the extreme line casing joint under axial tension and external collapse load. The model investigates the stress distribution of each thread tooth subjected to various tensile forces and external pressures. Additionally, the tensile strength and crushing strength of the extreme line casing joint are determined through both analytical and experimental approaches. The findings reveal that, under axial tensile load, the bearing surface of each thread tooth experiences uneven stress, with relatively high equivalent stress at the root of each thread tooth. The end thread teeth are valuable spots for failure. It is observed that the critical fracture axial load of thread decreases linearly with the increase of thread tooth sequence. Under external pressure, the circumferential stress is highest at the small end of the external thread, leading to yield deformation. The tensile strength of the joint obtained from the finite element model exhibits a relative error of less than 7% compared to the analytical and experimental values,proving the reliability of the finite element model. The tensile strength of the joint is 3091.9 k ***, in terms of anti-collapse capability, the joints demonstrate higher resistance to collapse compared to the casing body, which i

关键词： Extreme line casing Elastic-plastic mechanics Finite element analysis Tensile strength Collapse strength

Rare earth element-modified MOF materials:synthesis and photocatalytic applications in environmental remediation

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Rare Metals 2024年第4期43卷 1390-1406页

作者： Shu-Kun Le Qi-Jie Jin Jia-Ao Han Hua-Cong Zhou quan-Sheng Liu fu yang Jie Miao Pei-Pei Liu Cheng-Zhang Zhu Hai-Tao Xu Inner Mongolia Key Laboratory of High-Value functional Utilization of Low Rank Carbon Resources Chemical Engineering CollegeInner Mongolia University of TechnologyHohhot010050China School of Environmental Science and Engineering Nanjing Tech UniversityNanjing210009China School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang212100China Institut National de la Recherche Scientifique-Énergie Matériaux et Télécommunications MontrealQCJ3X 1P7Canada

Metal-organic framework-like materials(MOFs)have been developed in the fields of photocatalysis for their excellent optical properties and physicochemical properties,including environmental remediation,CO_(2)photoreduction,water splitting,and so *** their important roles in various fields,rare earth elements have received growing interests from *** MOFs with rare earth elements for modification allows broadening the absorption spectrum,while the active electrons on their empty 4f orbitals can act as traps to capture photoexcited carriers to inhibit the recombination of electron-hole pairs,thus promoting photocatalytic ***,rare earth elements modified MOFs provide an attractive way to achieve their high value *** this mini-review,the synthesis of rare earth element-modified MOFs photocatalysts and corresponding applications in the removal of antibiotics,CO_(2)reduction,and hydrogen production are constructively summarized and ***,the latest advancements and current difficulties of these materials as well as the application prospects are also provided.

关键词： Rare earth metals MOFs Photocatalytic CO_(2) reduction Environmental remediation Water splitting

Review on recent advances of inorganic electrode materials for potassium-ion batteries

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Tungsten 2024年第1期6卷 174-195页

作者： Jian-Zhen Xiong Ze-Cheng yang Xin-Liang Guo Xi-Ying Wang Chao Geng Zong-fu Sun An-Yong Xiao quan-Chao Zhuang Ya-Xin Chen Zhi-Cheng Ju School of Materials Science and Physics China University of Mining and TechnologyXuzhou 221116China

Rechargeable potassium-ion batteries(PIBs)have great potential in the application of electrochemical energy storage devices due to the low cost,the abundant resources and the low standard reduction potential of *** electrode materials are the key factors to determine the electrochemical performance of devices,relevant research is being carried out to build high-performance *** recent years,significant progress has been made in the study of the design of inorganic electrode ***,we review the cathode materials(Prussian blue and its analogues,layered oxides and poly anionic compounds)and the anode materials(antimony-based,selenium-based and bismuth-based compounds).On the basis of previous work,the structural design principles for improving the performance of electrode materials are reasonably *** the same time,the problems that need to be solved in the preparation of electrode materials and the direction of future research and improvement are pointed out.

关键词： Inorganic electrode materials Potassium-ion batteries Cathode materials Anode materials

Angiotensin IV upregulates the activity of protein phosphatase 1α in Neura-2A cells

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Protein & Cell 2013年第7期4卷 520-528页

作者： Dan Wang Peng Xue Xiu Lan Chen Zhen Sheng Xie fu quan yang Li Zheng Tao Xu National Key Laboratory of Biomacromolecules Institute of BiophysicsChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Science Beijing 100049China

The peptide angiotensin IV(Ang IV)is a derivative of angiotensin *** insulin regulated amino peptidase(IRAP)has been proposed as a potential receptor for Ang IV,the signalling pathways of Ang IV through IRAP remain *** applied high-resolution mass spectrometry to perform a systemic quantitative phosphoproteome of Neura-2A(N2A)cells treated with and without Ang IV us-ing sta ble-isotope labeling by amino acids in cell culture(SILAC),and identifi ed a reduction in the phosphorylation of a major Ser/Thr protein phosphorylase 1(PP1)upon Ang IV *** addition,spinophilin(spn),a PP1 reg-ulatory protein that plays important functions in the neural system,was expressed at higher *** revealed decreased phosphorylation of p70S6 kinase(p70S6K)and the major cell cycle modulator retinoblas-toma protein(pRB).These changes are consistent with an observed decrease in cell *** together,our study suggests that Ang IV functions via regulating the activity of PP1.

关键词： angiotensin IV PP1α cell proliferation p70S6 kinase spinophilin

General anesthetic agents induce neurotoxicity through oligodendrocytes in the developing brain

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Zoological Research 2024年第3期45卷 691-703页

作者： Wen-Xin Hang Yan-Chang yang Yu-Han Hu fu-quan Fang Lang Wang Xing-Hua Qian Patrick M.McQuillan Hui Xiong Jian-Hang Leng Zhi-Yong Hu Department of Anesthesiology First Affiliated HospitalZhejiang University School of MedicineHangzhouZhejiang 310003China Department of Cell Biology Yale UniversityNew HavenCT 06520USA Department of Neurology of the First Affiliated Hospital Interdisciplinary Institute of Neuroscience and TechnologySchool of Brain Science and Brain MedicineZhejiang University School of MedicineHangzhouZhejiang 310027China Department of Anesthesiology Jiaxing Maternity and Childcare Health HospitalJiaxingZhejiang 314009China Department of Anesthesiology Penn State Hershey Medical CentrePenn State College of MedicineHersheyPA 17033USA Department of Central Laboratory Affiliated Hangzhou First People’s HospitalWestlake University School of MedicineHangzhouZhejiang 310006China

General anesthetic agents can impact brain function through interactions with neurons and their effects on glial *** perform essential roles in the central nervous system,including myelin sheath formation,axonal metabolism,and neuroplasticity *** are particularly vulnerable to the effects of general anesthetic agents resulting in impaired proliferation,differentiation,and *** are increasingly interested in the effects of general anesthetic agents on *** agents not only act on the surface receptors of oligodendrocytes to elicit neuroinflammation through modulation of signaling pathways,but also disrupt metabolic processes and alter the expression of genes involved in oligodendrocyte development and *** this review,we summarize the effects of general anesthetic agents on *** anticipate that future research will continue to explore these effects and develop strategies to decrease the incidence of adverse reactions associated with the use of general anesthetic agents.

关键词： Oligodendrocytes General anesthetic agents Neurotoxicity Central nervous system Perioperative neurocognitive disorders