检索结果-南通市图书馆

A Pseudo-Kinetic Approach for Helmholtz Equation

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 Annals of Mathematics,Series B 2013年第3期34卷 319-332页

作者： Radjesvarane ALEXANDRE jie liao Department of Mathematics Shanghai Jiao Tong University IRENAV Research Institute French Naval AcademyBrest-Lanvoc 29290 France School of Science East China University of Science and Technology

A lattice Boltzmann type pseudo-kinetic model for a non-homogeneous Helmholtz equation is derived in this paper. NumericM results for some model problems show the robustness and efficiency of this lattice Boltzmann type pseudo-kinetic scheme. The computation at each site is determined only by local parameters, and can be easily adapted to solve multiple scattering problems with many scatterers or wave propagation in nonhomogeneous medium without increasing the computational cost.

关键词： Lattice Boltzmann scheme Non-homogeneous Helmholtz equation Discrete velocity

A New Method for Deriving High-Vertical-Resolution Wind Vector Data from the L-Band Radar Sounding System in China

在线全文

学校读者我要写书评

暂无评论

Advances in Atmospheric Sciences 2024年第11期41卷 2192-2202页

作者： Fang YUAN Zijiang ZHOU jie liao National Meteorological Information Center China Meteorological AdministrationBeijing 100081China

High-vertical-resolution radiosonde wind data are highly valuable for describing the dynamics of the meso-and microscale atmosphere. However, the current algorithm used in China's L-band radar sounding system for calculating highvertical-resolution wind vectors excessively smooths the data, resulting in significant underestimation of the calculated kinetic energy of gravity waves compared to similar products from other countries, which greatly limits the effective utilization of the data. To address this issue, this study proposes a novel method to calculate high-vertical-resolution wind vectors that utilizes the elevation angle, azimuth angle, and slant range from L-band radar. In order to obtain wind data with a stable quality, a two-step automatic quality control procedure, including the RMSE-F(root-mean-square error F) test and elemental consistency test are first applied to the slant range data, to eliminate continuous erroneous data caused by unstable signals or radar malfunctions. Then, a wind calculation scheme based on a sliding second-order polynomial fitting is utilized to derive the high-vertical-resolution radiosonde wind vectors. The evaluation results demonstrate that the wind data obtained through the proposed method show a high level of consistency with the high-resolution wind data observed using the Vaisala Global Positioning System and the data observed by the new Beidou Navigation Sounding System. The calculation of the kinetic energy of gravity waves in the recalculated wind data also reaches a level comparable to the Vaisala observations.

关键词： L-band radar sounding system upper air high-vertical-resolution radiosonde wind vectors quality control polynomial fitting

Prevention strategies of postoperative adhesion in soft tissues by applying biomaterials:Based on the mechanisms of occurrence and development of adhesions

在线全文

学校读者我要写书评

暂无评论

Bioactive Materials 2023年第8期26卷 387-412页

作者： jie liao Xiaoming Li Yubo Fan Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education Beijing Advanced Innovation Center for Biomedical EngineeringSchool of Biological Science and Medical EngineeringBeihang UniversityBeijing100083China

Postoperative adhesion(POA)widely occurs in soft tissues and usually leads to chronic pain,dysfunction of adjacent organs and some acute complications,seriously reducing patients’quality of life and even being *** for adhesiolysis,there are few effective methods to release existing ***,it requires a second operation and inpatient care and usually triggers recurrent adhesion in a great ***,preventing POA formation has been regarded as the most effective clinical *** have attracted great attention in preventing POA because they can act as both barriers and drug ***,even though much reported research has been demonstrated their efficacy on POA inhibition to a certain extent,thoroughly preventing POA formation is still ***,most biomaterials for POA prevention were designed based on limited experiences,not a solid theoretical basis,showing ***,we aimed to provide guidance for designing anti-adhesion materials applied in different soft tissues based on the mechanisms of POA occurrence and *** first classified the postoperative adhesions into four categories according to the different components of diverse adhesion tissues,and named them as“membranous adhesion”,“vascular adhesion”,“adhesive adhesion”and“scarred adhesion”,***,the process of the occurrence and development of POA were analyzed,and the main influencing factors in different stages were ***,we proposed seven strategies for POA prevention by using biomaterials according to these influencing ***,the relevant practices were summarized according to the corresponding strategies and the future perspectives were analyzed.

关键词： Prevention of postoperative adhesions(POA) Soft tissues Mechanisms of occurrence and development Biomaterials

A New Method for Quality Control of Chinese Rawinsonde Wind Observations

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

Advances in Atmospheric Sciences 2014年第6期31卷 1293-1304页

作者： liao jie WANG Bin LI Qingxiang State Key Laboratory of Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of Sciences University of Chinese Academy of Sciences National Meteorological Information Center

In 2006,the National Meteorological Information Center （NMIC） of the China Meteorological Administration （CMA） developed its real-time quality control （QC） system of rawinsonde observations coming from the Global Telecommunications System （GTS） and established the Global Upper-air Report Dataset,which,with the NMIC B01 format,is generally referred to as the B01 dataset and updated on a daily ***,when the B01 dataset is applied in climate analysis,some wind errors as well as some accurate values with incorrect error marks are *** improve the quality and usefulness of Chinese rawinsonde wind observations,a new QC method （NewQC） is proposed in this *** from the QC approach used for B01 datasets,the NewQC includes two vertical-wind-shear checks to analyze the vertical consistency of winds,in which the constant height level winds are used as reference data for the QC of mandatory pressure level *** threshold values are adopted in the wind shear checks for different stations and different vertical *** typical examples of QC of different error types by the new algorithm are shown and its performance with respect to 1980-2008 observational data is statistically *** with the radiosonde QC algorithms used in both the Meteorological Assimilation Data Ingest System （MADIS,http：//***/madis_raob_***） of the National Oceanic and Atmospheric Administration （NOAA） and the B01 dataset,the NewQC shows higher accuracy and better reliability,particularly when used to judge successive observation errors.

关键词： quality control rawinsonde observation vertical-wind-shear check

Axon guidance factor netrin-1 and its receptors regulate angiogenesis after cerebral ischemia

在线全文

学校读者我要写书评

暂无评论

Neuroscience Bulletin 2014年第4期30卷 683-691页

作者： Qiao Ding Song-jie liao Jian Yu Department of Neurology Guangdong Key Laboratory for Diagnosis and Treatment of Major Neurological DiseasesNational Key Clinical DepartmentNational Key Disciplinethe First Affiliated Hospital of Sun Yat-Sen University

Neurogenesis and angiogenesis play important roles in functional recovery after ischemic stroke. When cerebral ischemia occurs, axon regeneration can compensate for the loss of apoptotic neurons in the ischemic area. The formation of new blood vessels ameliorates the local decrease in blood supply, enhancing the supply of oxygen and nutrients to newly-formed neurons. New blood vessels also act as a scaffold for the migration of neuroblasts to the infarct area after ischemic stroke. In light of this, researchers have been actively searching for methods to treat cerebral infarction. Netrins were first identified as a family of proteins that mediate axon guidance and direct axon migration during embryogenesis. Later studies have revealed other functions of this protein family. In this review, we focus on netrin-1, which has been shown to be involved in axon migration and angiogenesis, which are required for recovery after cerebral ischemia. Thus, therapies targeting netrin-1 may be useful for the treatment of ischemic stroke.

关键词： netrin-1 angiogenesis cerebral ischemia neuronal recovery

Influence of hydraulic retention time on behavior of antibiotics and antibiotic resistance genes in aerobic granular reactor treating biogas slurry

在线全文

学校读者我要写书评

暂无评论

Frontiers of Environmental Science & Engineering 2019年第3期13卷 59-67页

作者： jie liao Chaoxiang Liu Lin Liu jie Li Hongyong Fan Jiaqi Ye Zhichao Zeng Key Laboratory of Environmental Biotechnology Fujian Province University Xiamen University of Technology Xiamen 361024 China Key Laboratory of Urban Pollutant Conversion Institute of Urban Environment Chinese Academy of Sciences Xiamen 361021 China Fujian Institute of Innovation Chinese Academy of Sciences Fuzhou 350002 China

The behavior of antibiotics and the corresponding resistance genes in aerobic granular reactors for treating biogas slurry under different hydraulic retention times (10.7 h, Rl;8 h, R2) was investigated in this study. The results indicated that the hydraulic retention time could affect the effluent concentrations and removal efficiencies of sulfonamides. The average removal rates of tetracyclines, fluoroquinolones, and sulfonamides were 63%, 46%, and 90% in Rl, and 62%, 46%, and 86% in R2, respectively. Although the removal efficiencies of tetracyclines and fluoroquinolones were similar in both reactors, the respective accumulated concentrations of tetracyclines and fluoroquinolones in R1 were 7.00 and 11.15μg/g SS, which were lower than those in R2 (8.92 and 13.37μg/g SS, respectively). The difference in the relative abundance of target antibiotic resistance genes between both reactors was not significant, yet the average relative abundances of all target resistance genes in R1 were higher than those in R2 after 45 days of operation. The results of this study suggested that a longer hydraulic retention time could enhance the antibiotic removal ability of aerobic granular sludge, yet it may also increase the risk of surplus sludge utilization from a resistance genes point of view.

关键词： Aerobic granules Swine wastewater Tetracyclines Fluoroquinolones Sulfonamides

Fiber-optic dual Fabry-Pérot interferometric carbon monoxide sensor with polyaniline/Co3O4/graphene oxide sensing membrane

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 Chemical Letters 2020年第8期31卷 2145-2149页

作者： Jin Peng jie liao Xiaozhan Yang Wenlin Feng Department of Physics and Energy Chongqing University of TechnologyChongqing 400054China Chongqing Key Laboratory of Green Energy Materials Technology and Systems Chongqing 400054China

An optical fiber dual Fabry-Perot interferometric carbon monoxide gas sensor based on PANI/Co3 O4/GO(PCG)sensing membrane coated on the end face of the optical fiber is proposed and *** end face of photonic crystal fiber(PCF)without cut-off wavelength is fused with a single-mode fiber(SMF),and the other end face of the PCF is coated with PCG sensing *** collapsed layer formed during the air hole fusion of PCF is used as the first reflector,the interface between PCF and sensing membrane is used as the second reflector,and the interface between the sensing membrane and the air is used as the third reflector,thus the dual Fabry-Pe rot structure sensor is *** results show that the sensor has excellent sensitivity and selectivity to carbon *** the increasing concentration of carbon monoxide gas in the range of 0-60 ppm,the intensity of interference spectrum *** sensitivity of the sensor is 0.3473 dB m/ppm,and its linearity is *** response time and recovery time are 68 s and 106 s,*** sensor has the advantages of the compact size,low cost,high sensitivity,strong selectivity and simple *** is suitable for the sensing detection of low concentration carbon monoxide gas.

关键词： Carbon monoxide Dual Fabry-Perot interferometer Gas sensor PANI/Co3O4/GO Sensing membrane

STABILITY OF GLOBAL MAXWELLIAN FOR NON-LINEAR VLASOV-POISSON-FOKKER-PLANCK EQUATIONS

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Scientia 2019年第1期39卷 127-138页

作者： jie liao Qianrong WANG Xiongfeng YANG Department of Mathematics East China University of Science and Technology School of Mathematical Sciences Key Laboratory of Scientific and Engineering Computing (MOE) Shanghai Jiao Tong University

In this article, we establish the exponential time decay of smooth solutions around a global Maxwellian to the non-linear Vlasov–Poisson–Fokker–Planck equations in the whole space by uniform-in-time energy estimates. The non-linear coupling of macroscopic part and Fokker–Planck operator in the model brings new difficulties for the energy estimates, which is resolved by adding tailored weighted-in-v energy estimates suitable for the Fokker–Planck operator.

关键词： non-linear Vlasov–Poisson–Fokker–Planck equation global Maxwellian global a priori estimates exponential convergence

Quantitative Analysis of Natural and Human Factors of Oasis Change in the Tail of Shiyang River over the Past 60 Years

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2020年第3期94卷 637-645页

作者： CHEN Yong YANG Guojing ZHOU Lihua liao jie WEI Xuan Northwest Institute of Eco-Environment and Resources Chinese Academy of SciencesLanzhou 730000China Institutes of Science and Development Chinese Academy of SciencesBeijing 100190China

The human and natural factors complicit in the driving forces of oasis change have always received considerable interest from the international research community. In this study, we used principal component analysis of natural and socio-economic statistical factors to quantitatively analyze the causal relationships and their contributions to the observed periodic expansion or shrinkage of the Minqin Oasis over almost 60 years. Our results show that human factors were the dominant factors governing expansion or shrinkage, with average contributions of 69.38% and 76.16%, respectively. Moreover, policy decisions have been the pivotal human factors. Under the influence of various policies, we have found that water resource utilization, land reclamation, population explosion, ecological protection and economic development have each played leading roles in different periods. This study provides a scientific basis for modelling the dynamics of an oasis for sustainable management.

关键词： Oasis change natural factors human factors Minqin Oasis