检索结果-南通市图书馆

Investigating Optical Transport Network Performance:A Recurrence Plot Approach

在线全文

学校读者我要写书评

暂无评论

China Communications 2024年第5期21卷 166-176页

作者： sun Xiaochuan Cao Difei Wei biao Li Zhigang Li Yingqi College of Artificial Intelligence North China University of Science and TechnologyTangshan 063210China Hebei Key Laboratory of Industrial Intelligent Perception Tangshan 063210China

In future optical transport networks,lightpath performance analysis is of great practical significance for fully automated *** general,the quality of transmission(QoT)of lightpaths,measured by optical quality factor or optical signal-to-noise ratio,has a complex time-varying process,along with the interactions of the other lightpath state parameters(LSPs),such as transmit power,chromatic dispersion,polarization mode *** studies are mostly focused on lightpath QoT estimation,but ignoring lightpath-level data *** this case,our article proposes a novel lightpath performance analysis method considering recurrence plot(RP)and cross recurrence plot(CRP).Firstly,we give a detailed interpretation on the recurrence patterns of LSPs via a qualitative 2-D RP representation and its quantitative *** can potentially enable the accurate and fast lightpath failure detection with a low computational *** the other hand,CRP is devoted to modeling the relationships between lightpath QoT and LSPs,and the correlation degree is determined by a geometric mean of multiple indexes of cross recurrence quantification *** the view of application,such CRP analysis can provide the effective knowledge sharing to guarantee more credible QoT *** experiments on a real-world optical network dataset have clearly demonstrated the effectiveness of our proposal.

关键词： CRP analysis lightpath QoT optical transport networks RP analysis

Hypermethylation of the ALOX12 and CBS promoters in osteoporosis:Potential biomarkers for early diagnosis

在线全文

学校读者我要写书评

暂无评论

Genes & Diseases 2024年第1期11卷 30-33页

作者： shang Guo Yue Wu Weekai Chia Peichun Hsu Hongwei Wang Yunliang Wang biao Zhong Department of Orthopedic Surgery Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghai 200023China Institute of Translational Medicine Shanghai General HospitalShanghai Jiao Tong University School of Medicine(SJTU-SM)Shanghai 200025China The University of Chicago Department of MedicineChicagoIL 60637USA Department of Neurology The Second Affiliated Hospital of Zhengzhou UniversityZhengzhouHenan 450014China

As a bone-confined chronic degenerative disorder,the progression of osteoporosis is characterized by abnormal crosstalk between osteoblasts and osteoclasts,leading to an imbalance of bone remodeling in adults.1 Several studies reported that arachidonic acid ester 12 lipoxygenase(ALOX12)acts as a regulator in bone genesis by participating in the activation of the peroxisome proliferatoractivated receptor(PPARG)pathway through its reaction product.

关键词： osteoporosis diagnosis remodeling

Simulated Gravity Field Estimation for the Main Belt Comet 133P/Elst-Pizarro Based on a Satellite-to-satellite Tracking Mode

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

天文和天体物理学研究:英文版 2023年第9期23卷 129-141页

作者： shang-biao sun Jian-Guo Yan Wu-Tong Gao Bo Wang Zhen Wang Mao Ye Jean-Pierre Barriot State Key Laboratory of Information Engineering in Surveying Mapping and Remote SensingWuhan UniversityWuhan 430079China Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China Geodesy Observatory of Tahiti University of French PolynesiaBP 6570F-98702 FaaaTahitiFrench PolynesiaFrance

Most asteroids and comets are formed in the early stages of the solar system and therefore contain a wealth of information about their *** asteroid exploration mission planned in the coming years by China will likely target the celestial body named 133P/Elst-Pizarro(estimated diameter of about 4 km).The orbit of this asteroid stays within the asteroid belt,but nevertheless,it displays a comet-like dust *** this study,we used differential tracking data between two simulated probes and the data from an Earth station to estimate 133P gravity field *** observation mode is similar to how the gravity field was estimated for large celestial objects in the GRAIL and GRACE missions,but here the object is the very small 133P *** compared the estimated gravity fields obtained for 133P from the satellite-to-satellite combined with the Earth-based two-way range-rate observation mode,with only the Earth-based two-way range rate *** results show that the accuracy of the low-degree(4 degree and order)estimate of the gravity field is improved by one order of magnitude by using the satellite-to-satellite combined with the Earth-based two-way range-rate observation mode with respect to the Earthonly ***,another order of magnitude improvement in the gravity field solution is gained by decreasing the orbit altitude from 12 to 8 km.

关键词： gravitation-methods data analysis-celestial mechanics-comets general

The influence of silica on reaction rates and molecular hydrogen(H_(2))generation during olivine hydrothermal alteration

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2024年第1期67卷 222-233页

作者： Ruifang HUANG Weidong sun Xing DING Yusheng ZHAO Yibing LI Xiuqi shang CAS Key Laboratory of Ocean and Marginal Sea Geology South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China SUSTech Academy for Advanced Interdisciplinary Studies Southern University of Science and TechnologyShenzhen 518055China Center of Deep Sea Research Institute of OceanologyChinese Academy of SciencesQingdao 266071China State Key Laboratory of Isotope Geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China Institue of Geology Chinese Academy of Geological SciencesBeijing 100037China

Hydrothermal alteration of olivine greatly influences geodynamics and the recycling of volatiles(such as water and carbon)in subduction *** is an important component of geological fluids,and its influence on the hydrothermal alteration of olivine remains poorly *** this study,we performed experiments at 300–515℃ and 3.0 kbar(1 bar=10^(5)Pa)by reacting well homogenized mixtures of olivine and silica powders with saline solutions(0.5 mol L^(−1)NaCl).Silica greatly influences the reaction pathways,reaction rates,and molecular hydrogen(H_(2))formation during olivine hydrothermal *** experiments at 300℃ and 3.0 kbar with mixtures of olivine and 10 wt%silica,olivine was replaced by serpentine and *** proportions of serpentine and talc were determined according to standard curves based on infrared spectroscopy *** 6.5%serpentine and 12%talc were produced after an experimental duration of 7 days,which had no change after a longer period(14 days).Compared to the kinetics in silica-free systems,the rates of olivine hydrothermal alteration in experiments with 10 wt%silica are much *** overall reaction is:4.5Forsterite+5.5SiO_(2),aq+4H_(2)O=Serpentine+*** the addition of more silica(20 wt%and 40 wt%),olivine was transformed into *** rates of reaction were much faster,e.g.,for experiments with olivine and 20 wt%silica,43%of talc was produced after 14 days,which increased to 77%for experiments with 40 wt%silica over the same *** overall reaction is:3Forsterite+5SiO_(2),aq+2H_(2)O=*** experiments at 400–505℃ and 3.0 kbar,the promoting effect of silica on olivine hydrothermal alteration was also observed,which is closely associated with a decrease in Gibbs free energies of olivine hydrothermal *** 300℃ and 3.0 kbar,silica decreased H_(2)formed during olivine hydrothermal alteration by around an order of magnitude,resulting in an increase in oxygen *** on measured H_(2),we calibrated ox

关键词： Olivine hydrothermal alteration Silica Serpentinization Hydrogen Serpentine

A coating strategy on titanium implants with enhanced photodynamic therapy and CO-based gas therapy for bacterial killing and inflammation regulation

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第2期35卷 386-395页

作者： Liang Cheng Bingshuai Zhou Manlin Qi Xiaolin sun Shujun Dong Yue sun biao Dong Lin Wang Yingwei Yang Department of Oral Implantology Jilin Provincial Key Laboratory of Sciences and Technology for Stomatology Nanoengineering School and Hospital of StomatologyJilin UniversityChangchun 130021China State Key Laboratory on Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130021China College of Chemistry Jilin UniversityChangchun 130012China

Antimicrobial photodynamic therapy(aPDT)has been considered a noninvasive and effective modality against the bacterial infection of peri‑implantitis,especially the aPDT triggered by near-infrared(NIR)light due to the large penetration depth in ***,the complexity of hypoxia microenvironments and the distance of aPDT sterilization still pose challenges before realizing the aPDT clinical *** to the long lifespan and transmission distance of therapeutic gas molecules,we design a multi-functional gas generator that combines aPDT as well as O_(2) and CO gas release function,which can solve the problem of hypoxia(O_(2))in PDT and the problem of inflammation regulation(CO)in the distal part of peri‑implant inflammation under near-infrared(NIR)*** the composite nanoplatform that spin-coated on the surface of titanium implants,up-conversion nanoparticles(UCNPs)were involved in converting the NIR to visible,which further excites the partially oxidized stannic sulfide(SnS_(2)),realizing the therapeutic gas *** green(ICG)was further integrated to enhance the aPDT performance(Ti-U@SnS_(2)/I).Therefore,reactive oxygen species(ROS),CO,and O_(2) can be controllably administered via a composite nano-platform mediated by a single NIR light(808 nm).This implant surface modification strategy could achieve great self-enhancement antibacterial effectiveness and regulate the lingering questions,such as relieving the anoxic microenvironment and reaching deep infection sites,providing a viable antibiotic-free technique to combat peri‑implantitis.

关键词： Photodynamic therapy Biomaterials Dental implant Reactive oxygen species Carbon monoxide Hybrid nanoplatform

Discharge evolution law of debris flow based on a sharp bend physical modeling test

在线全文

学校读者我要写书评

暂无评论

Journal of Mountain Science 2024年第6期21卷 1904-1915页

作者： LU Ming sun Hao LIU Jinfeng Abrar HUSSAIN shang Yuqi FU Hang Key Laboratory of Mountain Hazards and Earth Surface Process Chinese Academy of SciencesChengdu 610041China Institute of Mountain Hazards and Environment Chinese Academy of SciencesChengdu 610041China University of Chinese Academy of Sciences Beijing 100049China

For the basins with debris flow development,its channel terrain exhibits a tortuous shape,which significantly restricts the movement of debris flows and leads to severe erosion effects on the concave ***,this study aims to analyze the shear force of debris flows within the bend *** established the relationship between the shear force and bend curvature through laboratory *** the long-term erosion by debris flows,the curvature radius of bends gradually increases,however,when this increasing trend reaches an equilibrium state with the intensity of debris flow discharge,there will be no significant change in curvature *** general,the activity pattern and discharges of debris flows would remain relatively ***,we can infer the magnitude of debris flow discharges from the terrain parameters of the bend channel.

关键词： Debris flow discharge Erosion effect Bend channel Curvature radius

Scale effect removal and range migration correction for hypersonic target coherent detection

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 2024年第1期35卷 14-23页

作者： WU shang sun Zhi JIANG Xingtao ZHANG Haonan DENG Jiangyun LI Xiaolong CUI Guolong School of Information and Communication Engineering University of Electronic Science and Technology of ChinaChengdu 611731China

The detection of hypersonic targets usually confronts range migration(RM)issue before coherent integration(CI).The traditional methods aiming at correcting RM to obtain CI mainly considers the narrow-band radar ***,with the increasing requirement of far-range detection,the time bandwidth product,which is corresponding to radar’s mean power,should be promoted in actual ***,the echo signal generates the scale effect(SE)at large time bandwidth product situation,influencing the intra and inter pulse integration *** eliminate SE and correct RM,this paper proposes an effective algorithm,i.e.,scaled location rotation transform(ScLRT).The ScLRT can remove SE to obtain the matching pulse compression(PC)as well as correct RM to complete CI via the location rotation transform,being implemented by seeking the actual rotation *** to the traditional coherent detection algorithms,Sc LRT can address the SE problem to achieve better detection/estimation *** last,this paper gives several simulations to assess the viability of ScLRT.

关键词： hypersonic target detection coherent integration(CI) scale effect(SE)removal range migration(RM)correction scaled location rotation transform(ScLRT)

Observation of the failure mechanism in Ag10Ge15Te75-based memristor induced by ion transport

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第9期17卷 8431-8437页

作者： Yuwei Xiong Kuibo Yin Weiwei sun Jingcang Li shangyang shang Lei Xin Qiyun Wu Xiaoran Gong Yidong Xia Litao sun SEU-FEI Nano-Pico Center Key Laboratory of MEMS of Ministry of EducationSoutheast UniversityNanjing 210096China College of Engineering and Applied Sciences Nanjing UniversityNanjing 210093China

The solid-electrolyte-based memristors have attracted tremendous attention for the next-generation nonvolatile memory for both logic and neuromorphic ***,they encounter variability performance challenges which originated from the random ionic transport and conductive filaments ***,the electrochemical metallized mechanism associated with ion transport has been ***,the failure mechanism caused by ion transport during cycles is rarely ***,the five stages of failure in the Ag/Ag10Ge15Te75/W memristor are elucidated through ex-situ current-voltage measurements combined with in-situ transmission electron microscopy *** investigation reveals that the migration and enrichment of Ag ions result in the precipitation of Ag_(2)*** formation of Ag_(2)Te hinders the device's ability to maintain its bipolar characteristics and also decreases the resistance value of the high resistance state,thereby reducing the device's switching *** promising results provide important guidance for the future design of structures and the manipulation of ion transport for high-performance memristors.

关键词： Ag10Ge15Te75 in-situ transmission electron microscopy(TEM) failure mechanism

Hemispherical resonator with low subsurface damage machined by small ball-end fine diamond grinding wheel:A novel grinding technique

维普期刊数据库评论

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 Journal of Aeronautics 2024年第5期37卷 570-585页

作者： biao QIN Henan LIU Jian CHENG Jinchuan TIAN Jiangang sun Zihan ZHOU Chuanzhen MA Mingjun CHEN State Key Laboratory of Robotics and System Harbin Institute of TechnologyHarbin 150001China Center for Precision Engineering Harbin Institute of TechnologyHarbin 150001China

As for the ultra-precision grinding of the hemispherical fused silica resonator,due to the hard and brittle nature of fused silica,subsurface damage(SSD)is easily generated,which enormously influences the performance of such ***,ultra-precision grinding experiments are carried out to investigate the surface/subsurface quality of the hemispherical resonator machined by the small ball-end fine diamond grinding *** influence of grinding parameters on the surface roughness(SR)and SSD depth of fused silica samples is then *** experimental results indicate that the SR and SSD depth decreased with the increase of grinding speed and the decrease of feed rate and grinding *** addition,based on the material strain rate and the maximum undeformed chip thickness,the effect of grinding parameters on the subsurface damage mechanism of fused silica samples is ***,a multi-step ultra-precision grinding technique of the hemispherical resonator is proposed based on the interaction influence between grinding depth and feed ***,the hemispherical resonator is processed by the proposed grinding technique,and the SR is improved from 454.328 nm to 110.449 nm while the SSD depth is reduced by 94%from 40μm to 2.379μ*** multi-step grinding technique proposed in this paper can guide the fabrication of the hemispherical resonator.

关键词： Fused silica Ultra-precision grinding Hemispherical resonator Subsurface damage Grinding technique