检索结果-南通市图书馆

Resisting shrinkage properties of volume holograms recorded in TiO_2 nanoparticle-dispersed acrylamide-based photopolymer

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 Physics B 2013年第12期22卷 280-286页

作者：赵磊韩俊鹤李若平王龙阁黄明举 Key Discipline Open Laboratory of Photonic and Electronic Information Materials and Devices Henan University College of Peili Engineering Technology Lanzhou City University

A novel organic–inorganic nanoparticle–photopolymer composite system is developed, and its fundamental holographic recording characteristics are studied. In this hydrophilic TiO2-nanoparticle-dispersed acrylamide photopolymer composite system, the counter-diffusion of monomers and nanoparticles plays a fundamental and key role in hologram grating formation. The experimental results indicate that the volume shrinkage of the nanoparticle–photopolymer film during the holographic recording can be drastically reduced compared with the undoped photopolymer film. It is also found that the diffraction efficiency of the grating recorded in the nanoparticle–photopolymer film depends strongly on the concentration of the TiO2-nanoparticles, and there exists an optimal TiO2-nanoparticle-doping concentration to make the diffraction efficiency and the refractive index modulation reach their maxima. Additionally, the digital data page is stored and reconstructed in the nanoparticle–photopolymer film.

关键词： holographic proprieties TiO2-nanoparticle diffraction efficiency Bragg-mismatch

Chemical composition,energy and amino acid digestibility in double-low rapeseed meal fed to growing pigs

在线全文

学校读者我要写书评

暂无评论

Journal of Animal Science and Biotechnology 2015年第4期6卷 445-454页

作者： peili Li Fengli Wang Fei Wu Jinrong Wang Ling Liu Changhua Lai State Key Laboratory of Animal Nutrition College of Animal Science and TechnologyChina Agricultural University college of Bio-engineering Henan University of Technology

Background： The nutritional value of rapeseed meal may be variable due to the variation of its chemical composition. And a precise understandin9 of the nutritional value of an ingredient is beneficial for the accurate diet formulation and reduction of feed costs. This study was conducted to determine the chemical composition, dicjestible energy （DE） and metabolizable enercjy （ME） content, and apparent ileal digestibility （AID） and standardized ileal dicjestibility （SID） of amino acids （AA） for growincj pigs. Thirteen solvent-extracted double-low rapeseed meal （DLIRSM） samples were obtained from the main double-low rapeseed producing areas in China. Methods： The DE and ME contents of the 13 DLRSM samples were measured in cjrowin9 pigs （six pigs per DLRSM sample, average initial body weicjht （BW） =48.3 kg）. The AID and SID of AA of 10 DLRSM samples were determined in 12 crossbred barrows （average initial BW = 35.3 kcj） by using two 6 x 6 Latin square designs. Each Latin square comprised one N-flee diet and 5 DLRSM test diets. Results： The chemical composition of DLRSM varied among samples, and the coefficient of variation was greater than ]0 % for ether extract （EE）, neutral detergent fiber （NDF）, acid detergent fiber （ADF）, calcium （Ca）, and total 91ucosinolates. The AA content of DLRSM varied among samples especially for lysine （Lys） and methionine （Met）. On a dry matter （DM） basis, the apparent total tract digestibility （ATFD） of gross energy （GE）, the DE and ME and the ME：DE ratio of DLRSM averaged 62.39 %, 2862 kcal/k9 and 2723 kcal/kcj, and 94.95 %, respectively. The mean value of S1D of Lys was 70.52 % which varied from 66.54-76.54 %. The SID of crude protein （CP）, Met, and threonine （Thr） averaged 72.81%, 82.41%, and 69.76 %, respectively. Conclusions： There was great variability in chemical composition especially in the concentration of EE, NDF and ADF, but no significant differences in energy content of the DLIRSM samples were observed. In addition, the AID and SID of all AA were relatively similar amoncj

关键词： Digestible energy Double-low rapeseed meal Growing pigs Ileal digestibility of amino acids,Metabolizable energy

Deformation characteristics and damage ontologies of soft and hard composite rock masses under impact loading

在线全文

学校读者我要写书评

暂无评论

Journal of Mountain Science 2024年第5期21卷 1715-1727页

作者： LI Jinhua ZHANG Tianyu WU Baolin SU peili YANG Yang WANG Pan Architectural and Civil engineering college Xi’an University of Science and TechnologyXi’an 710054China

As one of the most common occurring geological landforms in deep rock formations, the dynamic mechanical properties of layered composite rock bodies under impact loading have been widely studied by scholars. To study the dynamic properties of soft and hard composite rocks with different thickness ratios, this paper utilizes cement, quartz sand and gypsum powder to construct soft and hard composite rock specimens and utilizes a combination of indoor tests, numerical calculations, and theoretical analyses to investigate the mechanical properties of soft and hard composite rock bodies. The test results reveal that:(1) When the proportion of hard rock increases from 20% to 50%, the strength of the combined rock body increases by 69.14 MPa and 87 MPa when the hard rock face and soft rock face are loaded, respectively;however, when the proportion of hard rock is the same, the compressive strength of the hard rock face impact is 9%-17% greater than that of the soft rock face impact;(2) When a specimen of soft and hard combined rock body is subjected to impact loading, the damage mode involves mixed tension and shear damage, and the cracks generally first appear at the ends of the specimen, then develop on the laminar surface from the impact surface, and finally end in the overall damage of the soft rock part. The development rate and the total number of cracks in the same specimen when the hard rock face is impacted are significantly greater than those when the soft rock face is impacted;(3) By introducing Weibull’s statistical strength theory to establish the damage variables of soft-hard combined rock bodies, combined with the DP strength criterion, the damage model and the Kelvin body are concatenated to obtain a statistical damage constitutive model, which can better fit the full stress-strain curve of soft-hard combined rock body specimens under a single impact load.

关键词： Soft and hard composite rock mass Dynamic properties Split Hopkinson pressure bar(SHPB) Numerical simulation Intrinsic damage model

A facial strategy to efficiently improve catalytic performance of CoFe_(2)O_(4) to peroxymonosulfate

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2022年第6期34卷 1-13页

作者： Lili Gao Jieqiong Deng Tong Li Kai Qi Jiandong Zhang Qun Yi college of Environmental Science and engineering Taiyuan University of TechnologyTaiyuan 030024China college of Biomedical engineering Taiyuan University of TechnologyTaiyuan 030024China

Cobalt iron spinel(CoFe_(2)O_(4)) has been considered as a good heterogeneous catalysis to peroxymonosulfate(PMS) in the degradation of persistent organic pollutants due to its magnetic properties and good chemical stability. However, its catalytic activity needs to be further improved. Here, a facial strategy, “in-situ substitution”, was adopted to modify CoFe_(2)O_(4) to improve its catalytic performance just by suitably increasing the Co/Fe ratio in synthesis process. Compared with CoFe_(2)O_(4), the newly synthesized Co_(1.5)Fe_(1.5)O_(4), could not only significantly improve the degradation efficiency of phenol, from 50.69 to 93.6%, but also exhibited more effective mineralization ability and higher PMS utilization. The activation energy advantage for phenol degradation using Co_(1.5)Fe_(1.5)O_(4)was only 44.2 k J/mol, much lower than that with CoFe_(2)O_(4)(127.3 k J/mol). A series of related representations of CoFe_(2)O_(4) and Co_(1.5)Fe_(1.5)O_(4) were compared to explore the possible reasons for the outstanding catalytic activity of Co_(1.5)Fe_(1.5)O_(4). Results showed that Co_(1.5)Fe_(1.5)O_(4)as well represented spinel crystal as CoFe_(2)O_(4)and the excess cobalt just partially replaced the position of iron without changing the original structure. Co_(1.5)Fe_(1.5)O_(4) had smaller particle size(8.7 nm), larger specific surface area(126.3 m^(2)/g), which was more favorable for exposure of active sites. Apart from the superior physical properties, more importantly, more reactive centers Co(Ⅱ) and surface hydroxyl compounds generated on Co_(1.5)Fe_(1.5)O_(4), which might be the major reason. Furthermore, Co_(1.5)Fe_(1.5)O_(4) behaved good paramagnetism, wide range of pH suitability and strong resistance to salt interference, making it a new prospect in environmental application.

关键词： CoFe_(2)O_(4) Co_(1.5)Fe_(1.5)O_(4) In-situ substitution Peroxymonosulfate(PMS) Advanced oxidation processes(AOPs)

Selective Harmonics Elimination Technique for Artificial Bee Colony Implementation

在线全文

学校读者我要写书评

暂无评论

Computer Systems Science & engineering 2023年第6期45卷 2721-2740页

作者： T.DeepikaVinothini R.Karthigaivel J.BarsanaBanu Department of Electrical and Electronics engineering Velammal College of Engineering and TechnologyMaduraiIndia Department of Electrical and Electronics engineering PSNA College of Engineering and TechnologyDindigulIndia Department of Electrical and Electronics engineering SBM College of Engineering and TechnologyDindigulIndia

In this research,an Artificial Bee Colony(ABC)algorithm based Selective Harmonics Elimination(SHE)technique is used as a pulse generator in a reduced switch fifteen level inverter that receives input from a PV system.Pulse width modulation based on Selective Harmonics Elimination is mostly used to suppress lower-order harmonics.A high gain DC-DC-SEPIC converter keeps the photovoltaic(PV)panel’s output voltage constant.The Grey Wolf Optimization(GWO)filter removes far more Photovoltaic panel energy from the sunlight frame.To eliminate voltage harmonics,this unique inverter architecture employs a multi-carrier duty cycle,a high-frequency modulation approach.The proposed ABC harmonics elimination approach is compared to SHE strategies based on Particle Swarm Optimization(PSO)and Flower Pollination Algorithm(FPA).The suggested system’s performance is simulated and measured using the MATLAB simulation tool.The proposed ABC approach has a THD level of 4.86%,which is better than the PSO and FPA methods.

关键词： Artificial bee colony photovoltaic flower pollination algorithm multi-carrier

Glutamicibacter nicotianae AT6:A new strain for the efficient biodegradation of tilmicosin

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

Journal of Environmental Sciences 2024年第8期142卷 182-192页

作者： Huijuan Li Hao Zhou Liling Fan Long Meng Yanyun Zhao Lanmei Zhao Bo Wang college of Chemical and Biological engineering Shandong University of Science and TechnologyQingdao 266590China college of Chemistry and Chemical engineering Heze UniversityHeze 274015China college of Safety and Environmental engineering Shandong University of Science and TechnologyQingdao 266590China

The degradation of tilmicosin(TLM),a semi-synthetic 16-membered macrolide antibiotic,has been receiving increasing attention.Conventionally,there are three tilmicosin degradation methods,and among them microbial degradation is considered the best due to its high efficiency,eco-friendliness,and low cost.Coincidently,we found a new strain,Glutamicibacter nicotianae sp.AT6,capable of degrading high-concentration TLM at 100 mg/L with a 97%removal efficiency.The role of tryptone was as well investigated,and the results revealed that the loading of tryptone had a significant influence on TLM removals.The toxicity assessment indicated that strain AT6 could efficiently convert TLM into less-toxic substances.Based on the identified intermediates,the degradation of TLM by AT6 processing through two distinct pathways was then proposed.

关键词： Tilmicosin Glutamicibacter nicotianae Biodegradation Degradation pathway Pharmaceutical wastewater

Network Traffic Prediction Using Radial Kernelized-Tversky Indexes-Based Multilayer Classifier

在线全文

学校读者我要写书评

暂无评论

Computer Systems Science & engineering 2022年第3期40卷 851-863页

作者： M.Govindarajan V.Chandrasekaran S.Anitha Department of Computer Applications Velalar College of Engineering and TechnologyErode638012India Department of Electronics and Communication engineering Velalar College of Engineering and TechnologyErode638012India Department of Information technology Kongu Engineering CollegePerunduraiIndia

Accurate cellular network traffic prediction is a crucial task to access Internet services for various devices at any time.With the use of mobile devices,communication services generate numerous data for every moment.Given the increasing dense population of data,traffic learning and prediction are the main components to substantially enhance the effectiveness of demand-aware resource allocation.A novel deep learning technique called radial kernelized LSTM-based connectionist Tversky multilayer deep structure learning(RKLSTM-CTMDSL)model is introduced for traffic prediction with superior accuracy and minimal time consumption.The RKLSTM-CTMDSL model performs attribute selection and classification processes for cellular traffic prediction.In this model,the connectionist Tversky multilayer deep structure learning includes multiple layers for traffic prediction.A large volume of spatial-temporal data are considered as an input-to-input layer.Thereafter,input data are transmitted to hidden layer 1,where a radial kernelized long short-term memory architecture is designed for the relevant attribute selection using activation function results.After obtaining the relevant attributes,the selected attributes are given to the next layer.Tversky index function is used in this layer to compute similarities among the training and testing traffic patterns.Tversky similarity index outcomes are given to the output layer.Similarity value is used as basis to classify data as heavy network or normal traffic.Thus,cellular network traffic prediction is presented with minimal error rate using the RKLSTM-CTMDSL model.Comparative evaluation proved that the RKLSTM-CTMDSL model outperforms conventional methods.

关键词： Cellular network traffic prediction connectionist Tversky multilayer deep structure learning attribute selection classification radial kernelized long short-term memory

Two-dimensional photoelectron momentum distribution of hydrogen in intense laser field

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 Physics B 2011年第11期20卷 183-189页

作者：孙长平赵松峰陈建宏周效信 Key Laboratory of Atomic and Molecular Physics and Functional Materials of Gansu Province College of Physics and Electronic EngineeringNorthwest Normal University peili college of engineering and Technique Lanzhou City University

Two-dimensional （2D） electron momentum distributions and energy spectra of a hydrogen in an intense laser field are calculated by solving the time-dependent SchrSdinger equation combined with the window-operator technique. Compared with the standard projection technique, the window-operator technique has the advantage that the continuum states of atoms can be avoided in the calculation. We show that the 2D electron momentum distributions and the energy spectra from those two techniques accord quite well with each other if an appropriate energy width is used in the window operator.

关键词： momentum distribution energy spectra time-dependent Schrodinger equation

Thin-film approximate point scattered function and its application to neutron radiography

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2022年第9期33卷 1-9页

作者： Jun Qin Jia-Yu Ni Lin-Feng Ye De-Hong Gao Wei-Jun Jiang Department of Nuclear engineering and New Energy technology The College of Engineering and Technology of Chengdu University of TechnologyLeshan 614000SichuanChina Society for Theoretical and Computational Physics The College of Engineering and Technology of Chengdu University of TechnologyLeshan 614000SichuanChina

A simpler and improved utility approximate point scattered function for thin-film converters currently used in neutron photographic devices is proposed as a correction method to produce clearer,more realistic images.The validity of the model was demonstrated through a simulation experiment.Based on the results,an error analysis was carried out,certain corrections were made to the original model,and the final model achieved a very low relative error in the simulation experiment.The model can also be optimized for quantitative neutron photographic analysis using iterative algorithms to obtain realistic neutron photographic images more quickly.At the end of the article,the model is extended to consider the case of energy spectrum hardening by introducing a temperature correction parameter.

关键词： Neutron radiography Point scattered function Image processing