检索结果-南通市图书馆

同方期刊数据库

Optimal regularity of positive solutions of the Hénon-Hardy equation and related equations

在线全文

学校读者我要写书评

暂无评论

Science china Mathematics 2024年

作者： Zongming guo Fangshu Wan college of Mathematics and Information Science Henan Normal University School of Mathematical Sciences University of Science and Technology of China

We present a new method to determine the optimal regularity of positive solutions u∈c4(Ω\{0})∩c0(Ω) of the Hénon-Hardy equation,i.e.,Δ2u=|x|~αupinΩ,(0.1)whereΩ?RN(N≥4) is a bounded smooth domain with 0∈Ω,α>-4,and p∈*** is clear that 0 is an isolated singular point of solutions of (0.1) and the optimal regularity of u inΩrelies on the parameterα.It is also important to see that the regularity of u at x=0 determines the regularity of u inΩ.We first establish asymptotic expansions up to arbitrary orders at x=0 of prescribed positive solutions u∈c4(Ω\{0})∩c0(Ω)of (0.1).Then we show that the regularity at x=0 of each positive solution u of (0.1) can be determined by some terms in asymptotic expansions of the related positive radial solution of the equation (0.1) withΩ=B,where B is the unit ball of *** main idea works for more general equations with singular weights.

关键词：

On-chip Micro Temperature controllers Based on Freestanding Thermoelectric Nano Films for Low-Power Electronics

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nano-Micro Letters 2024年第7期16卷 98-108页

作者： Qun jin Tianxiao guo Nicolas Perez Nianjun Yang Xin jiang Kornelius Nielsch Heiko Reith Institute for Metallic Materials Leibniz Institute for Solid State and Materials Research01069 DresdenGermany Institute of Materials Engineering University of Siegen57076 SiegenGermany Institute of Applied Physics Technical University of Dresden01069 DresdenGermany Institute of Materials Science Technical University of Dresden01069 DresdenGermany

Multidimensional integration and multifunctional com-ponent assembly have been greatly explored in recent years to extend Moore’s Law of modern ***,this inevitably exac-erbates the inhomogeneity of temperature distribution in microsystems,making precise temperature control for electronic components extremely ***,we report an on-chip micro temperature controller including a pair of thermoelectric legs with a total area of 50×50μm^(2),which are fabricated from dense and flat freestanding Bi2Te3-based ther-moelectric nano films deposited on a newly developed nano graphene oxide membrane *** tunable equivalent thermal resistance is controlled by electrical currents to achieve energy-efficient temperature control for low-power electronics.A large cooling temperature difference of 44.5 K at 380 K is achieved with a power consumption of only 445μW,resulting in an ultrahigh temperature control capability over 100 K mW^(-1).Moreover,an ultra-fast cooling rate exceeding 2000 K s^(-1) and excellent reliability of up to 1 million cycles are *** proposed on-chip temperature controller is expected to enable further miniaturization and multifunctional integration on a single chip for microelectronics.

关键词： Temperature control Low-power electronics On-chip micro temperature controller Freestanding thermoelectric nano films Temperature-sensitive components

Drought events influence nutrient canopy exchanges and green leaf partitioning during senescence in a deciduous forest

在线全文

学校读者我要写书评

暂无评论

Forest Ecosystems 2024年第1期11卷 110-119页

作者： j.Touche c.calvaruso P.De Donato M.-P.Turpault INRAE BEFF-54000NancyFrance UMR 7359 GeoRessourcesFaculte des Sciences-Campus des Aiguillettes54506Vandoeuvre Les NancyFrance EcoSustain Environmental Engineering OfficeResearch and DevelopmentKanfen57330France

The increase in the frequency and intensity of drought events expected in the coming decades in Western Europe may disturb forest biogeochemical cycles and create nutrient deficiencies in *** possible origin of nutrient deficiency is the disturbance of the partitioning of the green leaf pool during the leaf senescence period between resorption,foliar leaching and senesced ***,the effects of drought events on this partitioning and the consequences for the maintenance of tree nutrition are poorly *** experiment in a beech forest in Meuse(France)was conducted to assess the effect of drought events on nutrient canopy exchanges and on the partitioning of the green leaf pool during the leaf senescence *** aim was to identify potential nutritional consequences of droughts for *** nutrient dynamics,including resorption,chemistry of green and senesced leaves,foliar absorption and leaching in mature beech stands from 2012 to 2019 allowed us to compare the nutrient exchanges for three nondry and three dry years(i.e.,with an intense drought event during the growing season).During dry years,we observed a decrease by almost a third of the potassium(K)partitioning to resorption(*** efficiency),thus reducing the K reserve in trees for the next growing *** result suggests that with the increased drought frequency and intensity expected for the coming decades,there will be a risk of potassium deficiency in trees,as already observed in a rainfall exclusion experiment on the same study *** foliar leaching and higher parititioning to the senesced leaves for K and phosphorus(P)were also *** addition,a slight increase in nitrogen(N)resorption efficiency occurred during dry years which is more likely to improve tree *** calcium(ca)negative resorption decreased,with no apparent consequence in our study *** results show that nutrient exchanges in the canopy and the partitioning of the green leaf

关键词： Natural drought Beech forest canopy Resorption Foliar leaching Senesced leaves Nutrition

MXene-based all-solid flexible electrochromic microsupercapacitor

在线全文

学校读者我要写书评

暂无评论

Microsystems & Nanoengineering 2024年第3期10卷 347-355页

作者： Shanlu guo Ruihe Zhu jingwei chen Weilin Liu Yuxiang Zhang jianmin Li Haizeng Li college of Electronic and Optical Engineering&college of Flexible Electronics(Future Technology) Nanjing University of Posts and TelecommunicationsNanjing 210023China School of Materials Science and Engineering Ocean University of ChinaQingdao 266100China Optics and Thermal Radiation Research center Institute of Frontier and Interdisciplinary ScienceShandong UniversityQingdao 266237China Shenzhen Research Institute of Shandong University Shenzhen 518000China State Key Laboratory of Featured Metal Materials and Life cycle Safety for composite Structures Guangxi UniversityNanning 530004China

With the increasing demand for multifunctional optoelectronic devices,flexible electrochromic energy storage devices are being widely recognized as promising platforms for diverse ***,simultaneously achieving high capacitance,fast color switching and large optical modulation range is very *** this study,the MXenebased flexible in-plane microsupercapacitor was fabricated via a mask-assisted spray coating *** adding electrochromic ethyl viologen dibromide(EVB)into the electrolyte,the device showed a reversible color change during the charge/discharge *** to the high electronic conductivity of the MXene flakes and the fast response kinetics of EVB,the device exhibited a fast coloration/bleaching time of 2.6 s/2.5 s,a large optical contrast of 60%,and exceptional coloration *** addition,EVB acted as a redox additive to reinforce the energy storage performance;as a result,the working voltage window of the Ti_(3)c_(2)-based symmetric aqueous microsupercapacitor was extended to 1 ***,the device had a high areal capacitance of 12.5 mF cm^(−2)with superior flexibility and mechanical stability and showed almost 100%capacitance retention after 100 bending *** as-prepared device has significant potential for a wide range of applications in flexible and wearable electronics,particularly in the fields of camouflage,anticounterfeiting,and displays.

关键词： capacitance kinetics exceptional

A prognosis model for predicting immunotherapy response of esophageal cancer based on oxidative stress-related signatures

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Oncology Research 2024年第1期32卷 199-212页

作者： jING guo cHANGYONG TONG jIANGUANG SHI XINjIAN LI XUEQIN cHEN Department of Thoracic Surgery The First Affiliated Hospital of Ningbo UniversityNingboChina Department of chinese Traditional Medicine The First Affiliated Hospital of Ningbo UniversityNingboChina

Oxidative stress(OS)is intimately associated with tumorigenesis and has been considered a potential therapeutic ***,the OS-associated therapeutic target for esophageal squamous cell carcinoma(EScc)remains *** our study,gene expression data of EScc and clinical information from public databases were *** LASSO-cox regression analysis,a risk score(RS)signature map of prognosis was constructed and performed external verification with the GSE53625 *** ESTIMATE,xcell,cIBERSORT,TIMER,and ImmucellAI algorithms were employed to analyze infiltrating immune cells and generate an immune microenvironment(IM).Afterward,functional enrichment analysis clarified the underlying mechanism of the *** was utilized for forecasting the survival rate of individual EScc *** a result,we successfully constructed an OS-related genes(OSRGs)model and found that the survival rate of high-risk groups was lower than that of low-risk *** AUc of the ROc verified the strong prediction performance of the signal in these two cohorts *** to independent prognostic analysis,the RS was identified as an independent risk factor for *** nomogram and follow-up data revealed that the RS possesses favorable predictive value for the prognosis of EScc ***-PcR detection demonstrated increased expression of MPc1,cOX6c,cYB5R3,cASP7,and cYcS in esophageal cancer *** conclusion,we have constructed an OSRGs model for EScc to predict patients’prognosis,offering a novel insight into the potential application of the OSRGs model in EScc.

关键词： Esophageal carcinoma OS Prognosis Risk markers Immune cell infiltration

Observational appearance and extra photon rings of an asymmetric thin-shell wormhole with a Bardeen profile

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 Physics c 2024年第6期48卷 211-221页

作者：何柯腱罗智郭森李国平 Department of Physics Chongqing UniversityChongqing 401331China Guangxi Key Laboratory for Relativistic Astrophysics School of Physical Science and TechnologyGuangxi UniversityNanning 530004China School of Physics and Astronomy China West Normal UniversityNanchong 637000China

In this work,the optical appearance of an asymmetric thin-shell wormhole with a Bardeen profile is *** initiate the process,we need to construct an asymmetric thin-shell wormhole utilizing the cut-and-paste technique proposed by Visser and subsequently ascertain its pertinent physical quantities such as the radius of the photon sphere and critical impact parameters for different values of magnetic charge ***,the effective potential and motion behavior of photons are also investigated within the framework of asymmetric thin-shell wormholes with a Bardeen *** can be found that the effective potential,ray trajectory,and azimuthal angle of the thin-shell wormhole exhibit a strong correlation with the mass ratio of black *** considering the accretion disk as the sole background light source,we observe additional photon rings and lensing bands in the optical appearance of the asymmetric thin-shell wormhole with a Bardeen profile compared to those exhibited by the Bardeen black *** can find that there is an increase in the size of the specific additional light bands with increasing magnetic charge g,which is different from the black hole *** exceptionally luminous rings can serve as a robust criterion for the identification and characterization of the thin-shell wormhole spacetime.

关键词： shadow asymmetric thin-shell wormhole Bardeen black hole

Alterations in nasal microbiota of patients with amyotrophic lateral sclerosis

在线全文

学校读者我要写书评

暂无评论

chinese Medical journal 2024年第2期137卷 162-171页

作者： Kaixiong Liu Qifu guo Ying Ding Li Luo jianchai Huang Qijie Zhang Department of Respiratory and critical care Medicine The First Affiliated HospitalFujian Medical UniversityFuzhouFujian 350005China Department of Respiratory and Critical Care MedicineNational Regional Medical CenterBinhai Campus of The First Affiliated HospitalFujian Medical UniversityFuzhouFujian 350212China Department of Neurology Fujian Institute of NeurologyThe First Affiliated HospitalFujian Medical UniversityFuzhouFujian 350005China Department of NeurologyNational Regional Medical CenterBinhai Campus of The First Affiliated HospitalFujian Medical UniversityFuzhouFujian 350212China

Background:Links between alterations in gut microbiota composition and amyotrophic lateral sclerosis(ALS)have previously been *** study aimed to examine the microbiota in the nasal cavity of ***:Sixty-six ALS patients and 40 healthy caregivers who live in close proximity with patients were *** throughput metagenomic sequencing of the 16S ribosomal deoxyribonucleic acid(rDNA)gene V3-V4 region of nasal microbiota was used to characterize the alpha and beta diversity and relative abundance of bacterial taxa,predict function,and conduct correlation analysis between specific taxa and clinical ***:The nasal microbiome of ALS patients showed lower alpha diversity than that of corresponding healthy family *** Gaiella,Sphingomonas,Polaribacter_1,Lachnospiraceae_NK4A136_group,Klebsiella,and Alistipes were differentially enriched in ALS patients compared to *** microbiota composition in ALS patients significantly differed from that in healthy subjects(unweighted UniFrac P=0.001),while Linear discriminant analysis Effect Size(LEfSe)analysis indicated that Bacteroidetes and Firmicutes dominated healthy nasal communities at the phylum level,whereas Actinobacteria was the predominant phylum and Thermoleophilia was the predominant class in ALS *** Faecalibacterium and Alistipes were positively correlated with ALS functional rating scale revised(ALSFRS-R;r_(s)=0.349,P=0.020 and r_(s)=0.393,P=0.008),while Prevotella-9 and Bacteroides operational taxonomic units(OTUs)were positively associated with lung function(FVc)in ALS patients(r_(s)=0.304,P=0.045,and r_(s)=0.300,P=0.048,respectively).Prevotella-1 was positively correlated with white blood cell counts(WBc,r_(s)=0.347,P=0.021),neutrophil percentage(Neu%,r_(s)=0.428,P=0.004),and neutrophil-to-lymphocyte ratio(NLR,r_(s)=0.411,P=0.006),but negatively correlated with lymphocyte percentage(Lym%,r_(s)=-0.408,P=0.006).In contrast,Streptococcus was negatively associa

关键词： Amyotrophic lateral sclerosis Nasal microbiota Dysbiosis Inflammation

Identification of hub genes associated with Helicobacter pylori infection and type 2 diabetes mellitus:A pilot bioinformatics study

在线全文

学校读者我要写书评

暂无评论

World journal of Diabetes 2024年第2期15卷 170-185页

作者： Han chen guo-Xin Zhang Xiao-Ying Zhou Department of Gastroenterology The First Affiliated Hospital of Nanjing Medical UniversityNanjing 210003Jiangsu ProvinceChina Department of Gastroenterology Jiangsu Province HospitalNanjing 210029Jiangsu ProvinceChina

BAcKGROUND Helicobacter pylori(***)infection is related to various extragastric diseases including type 2 diabetes mellitus(T2DM).However,the possible mechanisms connecting *** infection and T2DM remain *** To explore potential molecular connections between *** infection and *** We extracted gene expression arrays from three online datasets(GSE60427,GSE27411 and GSE115601).Differentially expressed genes(DEGs)commonly present in patients with *** infection and T2DM were *** genes were validated using human gastric biopsy *** between hub genes and immune cell infiltration,miRNAs,and transcription factors(TFs)were further *** A total of 67 DEGs were commonly presented in patients with *** infection and *** significantly upregulated hub genes,including TLR4,ITGAM,c5AR1,FcER1G,and FcGR2A,were finally identified,all of which are closely related to immune cell *** gene-miRNA analysis detected 13 miRNAs with at least two gene ***-gene interaction networks showed that TLR4 was coregulated by 26 TFs,the largest number of TFs among the 5 hub *** We identified five hub genes that may have molecular connections between *** infection and *** study provides new insights into the pathogenesis of ***-induced onset of T2DM.

关键词： Helicobacter pylori Type 2 diabetes mellitus Bioinformatics analysis Differentially expressed genes Hub genes

Impact of nutritional support on immunity,nutrition,inflammation,and outcomes in elderly gastric cancer patients after surgery

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World journal of Gastrointestinal Surgery 2024年第7期16卷 2175-2182页

作者： Xiao-Wan chen Xiao-chun guo Fen cheng Department of Gastrointestinal Surgery Hubei Cancer HospitalWuhan 430079Hubei ProvinceChina Department of Gastroenterology The First People’s Hospital of Jiangxia DistrictWuhan 430200Hubei ProvinceChina

BAcKGROUND Postoperative rehabilitation of elderly patients with gastric cancer has always been the focus of clinical *** the intervention by a full-course nutritional support team can have a positive impact on the postoperative immune function,nutritional status,inflammatory response,and clinical outcomes of this special population has not yet been fully *** To evaluate the impact of full-course nutritional support on postoperative comprehensive symptoms in elderly patients with gastric *** This is a retrospective study,including 60 elderly gastric cancer patients aged 70 years and above,divided into a nutritional support group and a control *** nutritional support group received full postoperative nutritional support,including individualized meal formulation,and intravenous and parenteral nutrition supplementation,and was regularly evaluated and adjusted by a professional nutrition *** control group received routine postoperative *** After intervention,the proportion of cD4+lymphocytes(25.3%±3.1%vs 21.8%±2.9%,Pcantly higher in the nutritional support group than in the control group;the changes in body weight(-0.5 kg±0.8 kg vs-1.8 kg±0.9 kg,Pcant in the nutritional support group than in the control group;and the level of c-reactive protein(1.2 mg/L±0.4 mg/L vs 2.5 mg/L±0.6 mg/L,Pc count(7.2×10^(9)/L±1.5×10^(9)/L vs 9.8×10^(9)/L±2.0×10^(9)/L,Pcantly lower in the nutritional support group than in the control *** addition,patients in the nutritional support group had a shorter hospital stay(10.3 d±2.1 d vs 14.8 d±3.6 d,Pcidence of infection(15%vs 35%,Pcontrol *** The intervention by the nutritional support team has a positive impact on postoperative immune function,

关键词： Elderly gastric cancer Postoperative Nutritional support Immune function Inflammatory response clinical outcome