检索结果-南通市图书馆

cuInS_(2)quantum-dot-modified g-c_(3)N_(4)S-scheme heterojunction photocatalyst for hydrogen production and tetracycline degradation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

journal of Materials Science & Technology 2024年第5期172卷 145-155页

作者： jingjing Zhang Yue Zhao Kezhen qi Shu-yuan Liu college of Pharmacy Dali UniversityDali 671000China Department of Pharmacology Shenyang Medical CollegeShenyang 110034China

cuInS_(2)quantum-dot(cIS QD)-modified g-c_(3)N_(4)(cN)catalysts(cIS/cN)were prepared with the aid of an in-situ growth *** as-obtained photocatalysts were explored by measuring their crystallinity,surface morphology,binding energy and light absorption *** photocatalytic efficiency of the pho-tocatalysts was evaluated through photocatalytic water splitting for hydrogen production and tetracycline(Tc)antibiotic degradation under the simulated solar light and visible light *** optimized sample(10cIS/cN)showed the best photocatalytic activity:producing 102.4μmol g^(-1)h^(-1)of hydrogen in 1 h,or degrading 52.16%of Tc in 120 min,which were respectively 48 or 3.4 times higher than the photocatalytic activity of cN *** enhancement in the efficiency of the composite system was prin-cipally accredited to the enlargement of light absorption,the more effective in charge transfer and the dropping of the charge carrier pair recombination through a formed S-scheme heterojunctional *** work is an effort to adjust cN-based polysulfide QD for speedy *** enriched photo-catalytic activity grants a new sense for adjusting the optical properties of cN.

关键词： cuInS_(2)QDs g-c_(3)N_(4) Photocatalysis Hydrogen production S-scheme heterojunction

Trial characteristics and treatment effect estimates in randomized controlled trials of chinese herbal medicine: A meta-epidemiological study

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

journal of Integrative Medicine 2024年第3期22卷 223-234页

作者： Betty H.Wang Ya-li Lin Yin-yan Gao jin-lu Song Lang qin Ling-qi Li Wen-qi Liu claire c.W.Zhong Mary Y.jiang chen Mao Xiao-bo Yang Vincent c.H.chung Irene X.Y.Wu jockey club School of Public Health and Primary care the Chinese University of Hong KongHong Kong 999077China Xiangya School of Public Health Central South UniversityChangsha 410006Hunan ProvinceChina School of chinese Medicine the Chinese University of Hong KongHong Kong 999077China School of Public Health Southern Medical UniversityGuangzhou 510080Guangdong ProvinceChina State Key Laboratory of Dampness Syndrome of chinese Medicine the Second Affiliated Hospital of Guangzhou University of Chinese MedicineGuangzhou 510120Guangdong ProvinceChina chinese Medicine Syndrome Research Team the Second Affiliated HospitalGuangzhou University of Chinese MedicineGuangzhou 510120Guangdong ProvinceChina Guangdong Provincial Key Laboratory of clinical Research on Traditional chinese Medicine Syndrome Guangzhou 510120Guangdong ProvinceChina Hunan Provincial Key Laboratory of clinical Epidemiology Central South UniversityChangsha 410006Hunan ProvinceChina

Background:Previously published meta-epidemiological studies focused on Western medicine have identified some trial characteristics that impact the treatment effect of randomized controlled trials(RcTs).Nevertheless,it remains unclear if similar associations exist in RcTs on chinese herbal medicine(cHM).Further,chinese medicine-related characteristics have not been explored ***:To investigate trial characteristics related to treatment effect estimates on cHM *** strategy:This meta-epidemiological study searched 5 databases for systematic reviews on cHM treatment published between january 2011 and july *** criteria:An eligible systematic review should only include RcTs of cHM and conduct at least one *** extraction and analysis:Two reviewers independently conducted data extraction on general characteristics of systematic reviews,meta-analyses and included *** also assessed the risk of bias of RcTs using the cochrane risk of bias tool.A two-step approach was used for data *** ratio of odds ratios(ROR) and difference in standardized mean differences (dSMD) with 95%confidence interval (cI) were applied to present the difference in effect estimates for binary and continuous outcomes,***:Ninety-one systematic reviews,comprising 1338 RcTs were *** binary outcomes,RcTs incorporated with syndrome differentiation (ROR:1.23;95%cI:[1.07,1.39]),adopting chinese medicine formula (ROR:1.19;95%cI:[1.03,1.34]),with low risk of bias on incomplete outcome data (ROR:1.29;95%cI:[1.06,1.52]) and selective outcome reporting (ROR:1.12;95%cI:[1.01,1.24]),as well as a trial size≥100 (ROR:1.23;95%cI:[1.04,1.42]) preferred to show larger effect *** for continuous outcomes,RcTs with chinese medicine diagnostic criteria (dSMD:0.23;95%cI:[0.06,0.41]),judged as high/unclear risk of bias on allocation concealment (dSMD:-0.70;95%cI:[-0.99,-0.42]),with low risk of bias on incomplete outcome data (dSMD:0.30

关键词： chinese herbal medicine Randomized controlled trial Risk of bias Meta-epidemiological study Effect estimates

All laser direct writing process for temperature sensor based on graphene and silver

在线全文

学校读者我要写书评

暂无评论

Frontiers of Optoelectronics 2024年第1期17卷 45-55页

作者： qi Li Ruijie Bai Lianbo Guo Yang Gao Shanghai Key Laboratory of Intelligent Sensing and Detection Technology School of Mechanical and Power EngineeringEast China University of Science and TechnologyShanghai 200237China North Automatic control Technology Institute Taiyuan 030006China Wuhan National Laboratory for Optoelectronics Huazhong University of Science&TechnologyWuhan 430074China

A highly sensitive temperature sensing array is prepared by all laser direct writing(LDW)method,using laser induced silver(LIS)as electrodes and laser induced graphene(LIG)as temperature sensing layer.A finite element analysis(FEA)photothermal model incorporating a phase transition mechanism is developed to investigate the relationship between laser parameters and LIG properties,providing guidance for laser processing parameters selection with laser power of 1–5 W and laser scanning speed(greater than 50 mm/s).The deviation of simulation and experimental data for widths and thickness of LIG are less than 5%and 9%,*** electrical properties and temperature responsiveness of LIG are also *** changing the laser process parameters,the thickness of the LIG ablation grooves can be in the range of 30–120μm and the resistivity of LIG can be regulated within the range of 0.031–67.2Ω・*** percentage temperature coefficient of resistance(TcR)is calculated as−0.58%/°***,the FEA photothermal model is studied through experiments and simulations data regarding LIS,and the average deviation between experiment and simulation is less than 5%.The LIS sensing samples have a thickness of about 14μm,an electrical resistivity of 0.0001–100Ω・m is insensitive to temperature and pressure ***,for a LIS-LIG based temperature sensing array,a correction factor is introduced to compensate for the LIG temperature sensing being disturbed by pressure stimuli,the temperature measurement difference is decreased from 11.2 to 2.6°c,indicating good accuracy for temperature measurement.

关键词： Laser direct writing Temperature sensor Finite element analysis Laser induced graphene Laser induced silver

A robust viscoelastic surfactant tolerating 20% Hcl up to 150℃ for oil well stimulation

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2024年第3期21卷 1865-1874页

作者： ji Wang Ning qi Hong-Yao Yin Yu-jun Feng Polymer Research Institute State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu610065SichuanPR.China Tianfu Yongxing Laboratory New Theory and Technology of CO_(2) Capture Research CenterChengdu610065SichuanPR China School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580ShandongPR China

Viscoelastic surfactants(VES)are often used as viscous diverters in acidizing stimulation to prolong the acid consumption time and maximize zonal coverage of the acid for improving well ***,the ceiling temperature of commercial VES cannot exceed 120℃in practical use because of the poor thermal stability and fragile molecular structure,hindering their implementation in hightemperature oil reservoirs,i.e.,≥150℃.Here we synthesized a novel c22-tailed diamine,N-erucaminopropyl-N,N-dimethylamine(EDPA),and examined comparatively its rheological behavior,assemblies morphology and molecular stability in 20 wt%Hcl with a commercial VES,erucyl dimethyl amidopropyl betaine(EDAB).The feasibility of EDPA for acidizing stimulation was assessed by acid etching of carbonate rock with its Hcl solution at 150℃.Rheological results showed that the 2.5 wt%EDPA—20 wt%Hcl solution maintains stable viscosity of 90 m Pa s at 150℃for 60 min,while that of 2.0 wt%EDAB Hcl solution is just 1 m Pa s under identical conditions.1H NMR spectra and cryo-TEM observations revealed that the chemical structure and self-assembled architectures of EDPA remained intact in such context,but the EDAB suffered from degradation due to the hydrolysis of the amide group,accounting for the poor heat-resistance and *** reaction rate of 2.5 wt%EDPA Hcl solution with carbonate rock was one order of magnitude lower than that of 20 wt%Hcl solution at 150℃,underpinning the potential of EDPA to be used in the high-temperature reservoirs *** work improved the thermal tolerance of VES in highly concentrated Hcl solution,paving a feasible way for the acidization of high-temperature reservoir environments(~150℃).

关键词： Viscoelastic surfactants Thermal stability Self-diverting acid Wormlike micelles Acidizing stimulation

Sound event localization and detection based on deep learning

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2期35卷 294-301页

作者： ZHAO Dada DING Kai qi Xiaogang cHEN Yu FENG Hailin School of Mathematics and Statistics Xidian UniversityXi’an 710071China Science and Technology on Near-Surface Detection Laboratory Wuxi 214035China

Acoustic source localization(ASL)and sound event detection(SED)are two widely pursued independent research *** recent years,in order to achieve a more complete spatial and temporal representation of sound field,sound event localization and detection(SELD)has become a very active research *** paper presents a deep learning-based multioverlapping sound event localization and detection algorithm in three-dimensional ***-Mel spectrum and generalized cross-correlation spectrum are joined together in channel dimension as input *** features are classified and regressed in parallel after training by a neural network to obtain sound recognition and localization results *** channel attention mechanism is also introduced in the network to selectively enhance the features containing essential information and suppress the useless ***,a thourough comparison confirms the efficiency and effectiveness of the proposed SELD *** experiments show that the proposed algorithm is robust to reverberation and environment and can achieve higher recognition and localization accuracy compared with the baseline method.

关键词： sound event localization and detection(SELD) deep learning convolutional recursive neural network(cRNN) channel attention mechanism

Optimization on crystallization process of the magnetic core lysozyme

在线全文

学校读者我要写书评

暂无评论

Particuology 2024年第4期87卷 106-113页

作者： Lixia Hou chunxiao Qu Min Su Zhihan Liang qi Hao School of chemical Engineering Hebei University of TechnologyTianjin300130China

The continuous growth of the biomedical market highlights the significance of improvement in the ef-ficiency of batch production for protein drug ***,we investigated the effect of polymer-modified Fe_(3)O_(4) nanoparticles on lysozyme(Lys)crystallization at different conditions,using function-alized Fe_(3)O_(4) magnetic nanoparticles(Polymer c@Fe_(3)O_(4))as nucleation *** study revealed that the surface charge density of Polymer c@Fe_(3)O_(4) was highest at a modification mass ratio of Fe_(3)O_(4) to Polymer c is 8∶*** ratio facilitates the augmentation of electrostatic interaction and the promotion of *** adding 15%of the Polymerc@Fe_(3)O_(4) prepared from Fe_(3)O_(4) with an average particle size of 150 nm,the magnetic core lysozyme(M-Lys)crystals with an average particle size of 11.08μm,narrow size distribution,and regular morphology were obtained in a yield of 82.42%within 60 min.

关键词： Protein crystallization Magnetic particle Lysozyme

Unsupervised Multi-Expert Learning Model for Underwater Image Enhancement

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

IEEE/cAA journal of Automatica Sinica 2024年第3期11卷 708-722页

作者： Hongmin Liu qi Zhang Yufan Hu Hui Zeng Bin Fan the School of Intelligence Science and Technology and the Institute of Artificial Intelligence University of Science and Technology BeijingBeijing 100083China the School of Automation and Electrical Engineering University of Science and Technology BeijingBeijing 100083China IEEE

Underwater image enhancement aims to restore a clean appearance and thus improves the quality of underwater degraded *** methods feed the whole image directly into the model for ***,they ignored that the R,G and B channels of underwater degraded images present varied degrees of degradation,due to the selective absorption for the *** address this issue,we propose an unsupervised multi-expert learning model by considering the enhancement of each color ***,an unsupervised architecture based on generative adversarial network is employed to alleviate the need for paired underwater *** on this,we design a generator,including a multi-expert encoder,a feature fusion module and a feature fusion-guided decoder,to generate the clear underwater ***,a multi-expert discriminator is proposed to verify the authenticity of the R,G and B channels,*** addition,content perceptual loss and edge loss are introduced into the loss function to further improve the content and details of the enhanced *** experiments on public datasets demonstrate that our method achieves more pleasing results in vision *** metrics(PSNR,SSIM,UIQM and UcIQE) evaluated on our enhanced images have been improved obviously.

关键词： Multi-expert learning underwater image enhancement unsupervised learning

Transient NOE driven signal enhancement of INADEQUATE solid-state NMR spectroscopy for the structural analysis of rubbers

在线全文

学校读者我要写书评

暂无评论

Magnetic Resonance Letters 2024年第3期4卷 35-41页

作者： Zhiwei Yan Yue-qi Ye Rongchun Zhang South china Advanced Institute for Soft Matter Science and Technology(AISMST) School of Emergent Soft Matter(SESM)South China University of TechnologyGuangzhou510640China jEOL(Beijing)co. Ltd.Haidian DistrictBeijing100190China jEOL Ltd. MusashinoAkishimaTokyo196-8558Japan Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices South China University of TechnologyGuangzhou510640China

INADEQUATE(Incredible Natural Abundance DoublE QUAntum Transfer Experiment)is one of the most important techniques in revealing the carbon skeleton of organic solids in solid-state NMR ***,its use for structural analysis is quite limited due to the low natural abundance of^(13)c-^(13)c connectivity(~0.01%)and thus low ***,in semi-solids like rubbers,the sensitivity will be further significantly reduced by the inefficient cross polarization from 1H to^(13)c due to molecular motions induced averaging of^(1)H-^(13)c dipolar ***,in this study,we demonstrate that transient nuclear Overhauser effect(NOE)can be used to efficiently enhance^(13)c signals,and thus enable rapid acquisition of two-dimensional(2D)^(13)c INADEQUATE spectra of *** chlorobutyl rubber as the model system,it is found that an overall signalto-noise ratio(SNR)enhancement about 22%can be achieved,leading to significant timesaving by about 33%as compared to the direct polarization-based INADEQUATE *** experimental results on natural rubber and ethylene propylene diene monomer(EPDM)rubber are also shown to demonstrate the robust performance of transient NOE enhanced INADEQUATE experiment.

关键词： Transient NOE INADEQUATE carbon skeleton Rubbers

Patterns and mechanisms of belowground carbon responses to changes in precipitation

在线全文

学校读者我要写书评

暂无评论

journal of Plant Ecology 2024年第2期17卷 1-17页

作者： Hongyang chen qi Zhang Lingyan Zhou Xuhui Zhou School of Forestry Key Laboratory of Sustainable Forest Ecosystem Management-Ministry ofEducationNortheast Forestry UniversityHarbin 150040China Research center Shanghai Botanical Garden/Shanghai Engineering Research Center of Sustainable Plant InnovationShanghai 200231China

It is well known that aboveground productivity usually increases with ***,how belowground carbon(c)processes respond to changes in precipitation remains elusive,although belowground net primary productivity(BNPP)represents more than one-half of NPP and soil stores the largest terrestrial c in the *** paper reviews the patterns of belowground c processes(BNPP and soil c)in response to changes in precipitation from transect studies,manipulative experiments,modeling and data integration and *** results suggest the possible existence of nonlinear patterns of BNPP and soil c in response to changes in precipitation,which is largely different from linear response for aboveground productivity.c allocation,root turnover time and species composition may be three key processes underlying mechanisms of the nonlinear responses to changes in precipitation for belowground c *** addition,microbial community structure and long-term ecosystem processes(*** assemblage,soil texture,aggregate stability)may also affect patterns of belowground c processes in response to changes in *** last,we discuss implications and future perspectives for potential nonlinear responses of belowground c processes to changes in precipitation.

关键词： belowground processes BNPP nonlinear precipitation soil c