检索结果-南通市图书馆

A General Vectorial Ekeland's Variational Principle with a P-distance

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

Acta Mathematica Sinica,English Series 2013年第9期29卷 1655-1678页

作者： jing Hui qiu Fei HE School of Mathematical Sciences Soochow University School of Mathematical Sciences Soochow University School of Mathematical Sciences Inner Mongolia University

In this paper, by using p-distances on uniform spaces, we establish a general vectorial Ekeland variational principle （in short EVP）, where the objective function is defined on a uniform space and taking values in a pre-ordered real linear space and the perturbation involves a p-distance and a monotone function of the objective function. Since p-distances are very extensive, such a form of the perturbation in deed contains many different forms of perturbations appeared in the previous versions of EVP. Besides, we only require the objective function has a very weak property, as a substitute for lower semi-continuity, and only require the domain space （which is a uniform space） has a very weak type of completeness, i.e., completeness with respect to a certain p-distance. Such very weak type of completeness even includes local completeness when the uniform space is a locally convex topological vector space. From the general vectorial EVP, we deduce a general vectorial Caristi＇s fixed point theorem and a general vectorial Takahashi＇s nonconvex minimization theorem. Moreover, we show that the above three theorems are equivalent to each other. We see that the above general vectorial EVP includes many particular versions of EVP, which extend and complement the related known results.

关键词： Vectorial Ekeland’s variational principle vectorial Caristi’s fixed point theorem vectorial Takahashi’s minimization theorem p-distance Gerstewitz’s function

An effective snakebite first aid training method for medics in the Chinese troops: a RCT

在线全文

学校读者我要写书评

暂无评论

Military Medical Research 2020年第1期7卷 55-62页

作者： Chen qiu Xiao-Feng qiu jing-jing Liu Yi-Xin Wang Li Gui First Medical Center General Hospital of the PLABeijing 100853China Department of Emergency Nursing School of NursingNaval Medical UniversityShanghai 200433China Second Medical Center General Hospital of the PLABeijing 100853China

Background:Snakebites can lead to lifelong consequences and is one of the main causes of death among military troops ***,few Chinese military medics know the proper first aid procedures for ***,this study aimed to explore the impact of the Standard Operation Procedure(SOP)and checklist on Chinese military medics’ability to manage snakebite first ***:This study was a prospective single-blind randomized controlled trial conducted in a military medical university of China from May to June 2017.A questionnaire-based survey was performed to collect the participants’socio-demographic profiles before the baseline *** the baseline measurement,participants were requested to provide corresponding first aid that was responsive to the simulative situation portrayed by the standardized patients(SPs)and the evaluators then scored their performances according to a checklist for snakebite first aid scoring *** the baseline measurement,they were randomly assigned to one of three intervention groups after stratification according to their baseline performance scores:group A received a self-learning course with textbooks(n=27),group B received a self-learning training on the SOP and checklist(n=27)and group C was engaged in an interactive discussion panel regarding the SOP and checklist(n=26).After the interventions,participants received outcome measurements about snakebite first aid key points capability from the same evaluator and SP for each group to avoid observational *** reviewers were blinded about the grouping in the ***:The baseline measurement yielded no significant difference(H=1.647,P=0.439)among the three *** post-intervention scores were higher than the pre-intervention scores for all three(A,B and C)groups(P=0.008,P<0.001 and P<0.001,respectively).There was significant difference of the post-intervention scores among the three groups(F=8.841,P<0.001).Both post-intervention scores of gro

关键词： Snakebite Standard operation procedure(SOP) Checklist Medic Training

Highly Luminescent N-Benzylcarbazole Compound Immobilized in Amino-functionalized Mesoporous SBA-15

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2009年第4期25卷 518-521页

作者： WANG Hong-su GUAN jing-qi SONG Ke xu Chen KAN qiu-bin College of Chemistry Jilin University Changchun 130021 P. R. China Department of Agronomy Jilin University Changchun 130062 P. R. China

An inorganic-organic photoluminescence solid material was obtained by immobilizing N-benzylcarbazole compound to an amino-functionalized mesoporous SBA-15（designated as N-benzylcarbazole-amino-SBA-15）.XRD,SEM,and N2 adsorption-desorption measurements indicate that the mesostructure of parent material SBA-15 was preserved after introducing amino and N-benzylcarbazole *** absorbance and emission studies reveal that the fluorescent N-benzylcarbazole-amino-SBA-15 exhibited red-shift character in comparison to pure N-benzylcarbazole.

关键词： N-Benzylcarbazole SBA-15 BCz-amino-SBA-15 Luminescence

Personalized HRTF Prediction Based on Light GBM Using Anthropometric Data

在线全文

学校读者我要写书评

暂无评论

China Communications 2023年第6期20卷 166-177页

作者： Yinliang qiu jing Wang Zhiyu Li School of Information and Electronics Beijing Institute of TechnologyBeijing 100876China

This paper proposes a personalized headrelated transfer function(HRTF)prediction method based on Light GBM using anthropometric *** the overfitting problems of the current training-based prediction methods,we use Light GBM and a specific network structure to prevent over-fitting and enhance the prediction *** decomposing and combining the data to be predicted,we set up 90 Light GBM models to separately predict the 90instants of HRTF in log *** the same time,the method of 10-fold cross-validation is used to score the accuracy of the *** models with scores below 80 points,Bayesian optimization is used to adjust model hyperparameters to obtain a better model *** results obtained by Light GBM are evaluated with spectral distortion(SD)which can show the fitting error between the prediction and the original *** mean SD values of both ears on the whole test set are 2.32 d B and 2.28 d B *** with the non-linear regression method and the latest method,SD value of Light GBM-based method relatively decreases by 83.8%and 48.5%.

关键词： personalized HRTF anthropometric data LightGBM over-fitting

Influence of Temperature on the Protectiveness and Morphological Characteristics of Calcareous Deposits Polarized by Galvanostatic Mode

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2014年第1期27卷 131-139页

作者： Chengjie Li Min Du jing qiu jing Zhang Congjie Gao The Key Laboratory of Marine Chemistry Theory and Technology Ministry of EducationCollege of Chemistry and Chemical EngineeringOcean University of China

The influence of temperature on calcareous deposits formed under galvanostatic polarization mode was studied. The deposition was monitored by electrochemical impedance spectrum, and a supplementary loop in Nyquist diagram at high frequency was found to be an indicator of deposits precipitation with sufficient protection at above 20 ~C. An exponential increase of protectiveness with temperature was observed, which was quantified by linear polarization resistance technique. Observation by scanning electron microscope and X-ray diffraction analyses demonstrated that the critical temperature of calcium carbonate crystal form transition ranged from 15 to 20 ℃. Calcite formed below 15 ℃, while aragonite precipitated at above 20 ℃.

关键词： Calcareous deposits Temperature Galvanostatic Cathodic protection

Roles of Na^+/Ca^(2+) exchanger 1 in digestive system physiology and pathophysiology

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2019年第3期25卷 287-298页

作者： qiu-Shi Liao Qian Du Jun Lou jing-Yu xu Rui Xie Department of Gastroenterology Affiliated Hospital to Zunyi Medical College

The Na^+/Ca^(2+) exchanger(NCX) protein family is a part of the cation/Ca^(2+) exchanger superfamily and participates in the regulation of cellular Ca^(2+) homeostasis. NCX1, the most important subtype in the NCX family, is expressed widely in various organs and tissues in mammals and plays an especially important role in the physiological and pathological processes of nerves and the cardiovascular system. In the past few years, the function of NCX1 in the digestive system has received increasing attention; NCX1 not only participates in the healing process of gastric ulcer and gastric mucosal injury but also mediates the development of digestive cancer, acute pancreatitis, and intestinal *** review aims to explore the roles of NCX1 in digestive system physiology and pathophysiology in order to guide clinical treatments.

关键词： Na^+/Ca^2+exchanger Digestive system diseases Ion channel Sodium Calcium

Surface available gravitational potential energy in the world oceans

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

Acta Oceanologica Sinica 2022年第4期41卷 40-56页

作者： Ruixin Huang Bo qiu Zhiyou jing State Key Laboratory of Tropical Oceanography South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China Woods Hole Oceanographic Institution Woods HoleMA 02543USA Department of Oceanography University of Hawaii at ManoaHonoluluHI 96822USA

Satellite altimetry observations,including the upcoming Surface Water and Ocean Topography mission,provide snapshots of the global sea surface high anomaly *** common practice in analyzing these surface elevation data is to convert them into surface velocity based on the geostrophic *** increasing horizontal resolution in satellite observations,sea surface elevation data will contain many dynamical signals other than the geostrophic velocity.A new physical quantity,the available surface potential energy,is conceptually introduced in this study defined as the density multiplied by half of the squared deviation from the local mean reference surface *** gravitational potential energy is an intrinsic property of the sea surface height field and it is an important component of ocean circulation energetics,especially near the sea *** connection with other energetic terms,this new variable may help us better understand the dynamics of oceanic circulation,in particular the processes in connection with the free surface data collected through satellite *** preliminary application of this concept to the numerically generated monthly mean Global Ocean Data Assimilation System data and Archiving,Validation,and Interpretation of Satellite Oceanographic altimeter data shows that the available surface potential energy is potentially linked to other dynamic variables,such as the total kinetic energy,eddy kinetic energy and available potential energy.

关键词： satellite altimetry surface available potential energy eddy kinetic energy

Interferon-gamma regulates the progression of neuroblastoma cells through interferon-regulatory factor-1

在线全文

学校读者我要写书评

暂无评论

BIOCELL 2024年第9期48卷 1343-1353页

作者： jing WANG JUNFENG xu YINGRAN YANG YOUZHENG qiu SHANSHAN ZHANG NING WANG School of Clinical Medicine Dali UniversityDali671000China Department of Radiology The First Affiliated Hospital of Dali UniversityDali UniversityDali671000China Department of Pediatric Surgery The First Affiliated Hospital of Dali UniversityDali UniversityDali671000China

Objective:This study aimed to elucidate the influence of IFN-gamma(IFN-γ)in neuroblastoma(NB)cells and reveal its potential underlying molecular ***:The Cell Counting Kit-8,Transwell apparatus,and flow cytometry were employed to assess cellular viability,migratory capacity,invasive potential,and apoptotic rates,***-seq combined with bioinformatics analysis revealed differentially expressed genes(DEGs)and their possible biological *** levels were determined by western blot ***:IFN-γtreatment resulted in diminished cell viability,mitigated migratory and invasive capabilities,and augmented apoptotic activity in the SK-N-BE(2)cell line,whereas it exhibited the opposite effect in SH-SY5Y ***,interferon regulatory factor 1(IRF-1)was the common DEG in both IFN-γ-treated SK-N-BE(2)and SH-SY5Y ***,we found that it was underexpressed in NB *** depletion of IRF-1 promoted the progression of both SK-N-BE(2)and SH-SY5Y ***,IRF-1 knockdown effectively counteracted the effects of IFN-γon SK-N-BE(2)cells,while exacerbating them in SH-SY5Y ***:This study verified that IFN-γexerted a distinct role in both N-Myc-and non-N-Myc-amplified NB cells,partially by mediating the expression of IRF-1,suggesting that it may serve as a potent agent for treating patients with NB.

关键词： Neuroblastoma N-Myc-amplified Non-N-Myc-amplified IFN-γ IRF-1

Crystal Structure of the 1:2 Stoichiometric Nd: [α-SiW_(11)O_(39)]^(8-): K_5Na_5H_3[Nd(α-SiW_(11)O_(39))_2]·6H_2O

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 Structural Chemistry 2007年第2期26卷 234-238页

作者： HAN qiu-Xia WANG jing-Ping NIU jing-Yang Basic Experiment Teaching Center Henan University Kaifeng 475001 China Institute of Molecular and Crystal Engineering School of Chemistry and Chemical Engineering Henan University Kaifeng 475001 China

Single-crystal X-ray structural analysis of K5Na5H3[Nd（α-SiW11O39）2]·6H2O （triclinic, space group P1^-, a = 13.7738（10）, b = 19.722（2）, c = 20.6647（15） A, α = 111.0090（10）, β = 105.1740（10）, y = 98.6870（10）°, Z = 2, V = 4867.2（8）, Mr = 5914.40, Dc = 4.026,μ = 26.754 mm^-1, F（000） = 5076, R = 0.0750 and wR = 0.2077） reveals that two [α-SiW11O39]^8- moieties are connected through one Nd atom which is in a square antiprismatic coordination environment by eight oxygen atoms from two [α-SiW11O391]^8- moieties. The Nd（Ⅲ） ion is substituted for a [WO]^4＋ unit in the ＂cap＂ region of the tungsten-oxygen framework of the parent Keggin ion. Disordered Na^＋ cations and water molecules reside outside these channels, leaving empty pores with an intersecting slot （13 A × 10 A）.

关键词： crystal structure characterization polyoxometalates