检索结果-南通市图书馆

Separation efficiency of liquid-solid undergoing vibration based on breakage of liquid bridge

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Particuology 2022年第2期20卷 103-110页

作者： Jian Chen Jiahe shen Jie guo Geoff wang School of Mechanical Engineering The University of NewcastleCallaghan 2308Australia School of Chemical Engineering The University of QueenslandSt Lucia 4072Australia Centre for Bulk Solids and Particulate Technologies Newcastle Institute for Energy and ResourcesThe University of NewcastleCallaghan 2308Australia

Vibrating separation is a significant method for liquid-solid separation.A typical example is the vibrating screen to dewater wet granular *** properties of granular matter and the vibrating parameters significantly affect the separation *** study investigates the effect of vibration parameters in separation based on the breakage of large-scale liquid bridge numerically by using a calibrated simulation *** analysing the simulation results,the liquid bridge shape and the volume between two sphere particles for various particle sizes and particle distances were studied in the static condition under the effect of *** results show a general reducing trend of liquid bridge volume when the radius ratio of two particles increases,particularly when the ratio increases to ***,a set of vibrating motion was applied to the liquid bridge in the simulation model.A group of experiments were also performed to validate the simulation model with ***,the effect of vibrating peak acceleration,distance between spheres and radius on the separation efficiency which was reflected by the residual water were *** is found that separation efficiency increased obviously with the peak acceleration and the increase slowed down after the peak acceleration over 1 m/s^(2).

关键词： Liquid bridge shape Liquid bridge volume Retention capacity Vibration VOF model

Exploring the potential of olivine-containing copper-nickel slag for carbon dioxide mineralization in cementitious materials

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

International Journal of Minerals,Metallurgy and Materials 2024年第3期31卷 562-573页

作者： Qianqian wang Zequn Yao Lijie guo Xiaodong shen College of Materials Science and Engineering Nanjing Tech UniversityNanjing 211816China State Key Laboratory of Materials-Oriented Chemical Engineering Nanjing 211816China BGRIMM Technology Group Beijing 100160China

Water-quenched copper-nickel metallurgical slag enriched with olivine minerals exhibits promising potential for the production of CO_(2)-mineralized cementitious *** this work,copper-nickel slag-based cementitious material(CNCM)was synthesized by using different chemical activation methods to enhance its hydration reactivity and CO_(2) mineralization *** water curing ages and carbonation conditions were explored related to their carbonation and mechanical properties ***,thermogravimetry differential scanning calorimetry and X-ray diffraction methods were applied to evaluate the CO_(2) adsorption amount and carbonation products of *** development of carbonated CNCM blocks was examined by backscattered electron imaging(BSE)with energy-dispersive X-ray *** showed that among the studied samples,the CNCM sample that was subjected to water curing for 3 d exhibited the highest CO_(2) sequestration amount of 8.51wt%at 80℃and 72 h while presenting the compressive strength of 39.07 *** result indicated that 1 t of this CNCM can sequester 85.1 kg of CO_(2) and exhibit high compressive *** the addition of citric acid did not improve strength development,it was beneficial to increase the CO_(2) diffusion and adsorption amount under the same carbonation conditions from BSE *** work provides guidance for synthesizing CO_(2)-mineralized cementitious materials using large amounts of metallurgical slags containing olivine minerals.

关键词： copper-nickel slag fayalite CO_(2)sequestration cementitious material admixtures carbonation conditions

A Hybrid Unsupervised Clustering-Based Anomaly Detection Method

在线全文

学校读者我要写书评

暂无评论

Tsinghua Science and Technology 2021年第2期26卷 146-153页

作者： guo Pu Lijuan wang Jun shen Fang Dong School of Cyber Engineering Xidian UniversityXi'an 710126China School of Computing and Information Technology University of WollongongNSW 2522Australia School of Computer Science and Engineering Southeast UniversityNanjing 211189China

In recent years,machine learning-based cyber intrusion detection methods have gained increasing *** number and complexity of new attacks continue to rise;therefore,effective and intelligent solutions are *** machine learning techniques are particularly appealing to intrusion detection systems since they can detect known and unknown types of attacks as well as zero-day *** the current paper,we present an unsupervised anomaly detection method,which combines Sub-Space Clustering(SSC)and One Class Support Vector Machine(OCSVM)to detect attacks without any prior *** proposed approach is evaluated using the well-known NSL-KDD *** experimental results demonstrate that our method performs better than some of the existing techniques.

关键词： unsupervised learning clustering intrusion detection feature selection

Experimental and numerical study regarding H-steel all-bolted connection steel frame with composite wall boards

在线全文

学校读者我要写书评

暂无评论

Earthquake Engineering and Engineering Vibration 2024年第2期23卷 427-443页

作者： Fan Min guo Hongchao Li shen wang Zhenshan wang Huaqiang School of Civil Engineering and Architecture Xi’an University of TechnologyXi’an 710048China State Key Laboratory Base of Eco-Hydraulic Engineering in Arid Area Xi’an University of TechnologyXi’an 710048China

H-steel all-bolted connection steel frame structures with heat preservation and decoration composite wall boards were investigated and the seismic performances of three scaled specimens were *** failure modes,hysteresis curves,bearing capacity,ductility,energy dissipation capacity,stiffness degradation and strain distribution were *** calculation method of structural theoretical internal force was *** results showed that the overall structural seismic performance was better,and the structural ductility met the demands of elastic-plastic inter-story drift angle for seismic *** H-steel weak-axis connection structure obtained better energy dissipation capacity,and its bearing capacity and stiffness were slightly different from the strong-axis *** heat preservation and decoration performance of composite wallboard and the all-bolted connection of the steel frame realized prefabrication during the whole construction *** plastic hinge of the steel beam can be moved outwards because of the L-angles,which effectively avoids stress concentration in joint areas and expands the plastic hinge *** errors between the theoretical structural capacity calculated by the plastic analysis method and the test results were within 2.44%.In addition,structural failure mechanisms and bearing capacities were verified by the finite element(FE)analysis,and the effects of the main parameters on the structures were *** FE verification results were the same as in the *** research results provide theoretical support and technical guidance for the application of thermal insulation and decorative composite wall panels in H-shaped steel all-bolted steel frames.

关键词： composite wall boards all-bolted steel frame H-steel low-cyclic loading failure modes

GaAs backside via-hole etching using ICP system

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2007年第6期50卷 749-754页

作者： wang HaiLing guo Xia shen GuangDi Beijing Optoelectronic Technology Laboratory Institute of Electronic Information and Control Engineering Beijing University of Technology Beijing 100022 China Beijing Optoelectronic Technology Laboratory Institute of Electronic Information and Control Engineering Beijing University of Technology Beijing 100022 China Beijing Optoelectronic Technology Laboratory Institute of Electronic Information and Control Engineering Beijing University of Technology Beijing 100022 China

A high etch rate GaAs via-hole process was studied in an inductively coupled plasma system using Cl2/BCl3 gas system. The effects of process parameters on the GaAs etch rate were investigated. The influences of photoresist SiO2; Ni masks on the resultant profiles were also studied by scanning electron microscopy. A maximum etch rate of 8.9 μm/min was obtained; the etched profiles were optimized.

关键词： via-hole, GaAs, inductively coupled plasma, etching

在线全文

学校读者我要写书评

暂无评论

国内外人造板甲醛释放量检测方法的比较

木材加工机械 2016年第6期27卷 44-46页

作者：段芬沈卓王国琴吴婷桦浙江省家具与五金研究所杭州310013 浙江省方圆检测集团股份有限公司杭州310013

介绍了国内外人造板甲醛释放量的标准检测方法,并详述了国内外检测方法的相同点与不同点,同时指出4种检测方法优缺点以及适合的板材,对以后的人造板甲醛释放量的检测提供参考依据。

关键词：甲醛释放量干燥器法穿孔萃取法气体分析法气候箱法

Local thresholding with adaptive window shrinkage in the contourlet domain for image denoising

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2013年第9期56卷 65-73页

作者： shen XiaoHong wang Kai guo Qiang School of Computer Science and Technology Shandong University of Finance and Economics Shandong Provincial Key Laboratory of Digital Media Technology Shandong University of Finance and Economics

Threshold selection is a challenging job for the image denoising in the contourlet domain. In this paper, a new local threshold with adaptive window shrinkage is proposed. According to the anisotropic energy clusters in contourlet subbands, local adaptive elliptic windows are introduced to determine the neighboring coefficients with strong dependencies for each coefficient. Utilizing the maximum likelihood estimator within the adaptive window, the signal variance is estimated from the noisy neighboring coefficients. Based on the signal variance estimation, the new threshold is obtained in the Bayesian framework. Since it makes full use of the captured directional information of images, the threshold extends to the anisotropic spatial adaptability and behaves reliably. Simulation experiments show that the new method exhibits better performance than other outstanding wavelet and contourlet denoising schemes obviously, both in the PSNR value and the visual appearance.

关键词： image denoising thresholding contourlet transform adaptive window directional selectivity

Degree elevation from Bzier curve to C-Bzier curve with corner cutting form

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Applied Mathematics(A Journal of Chinese Universities) 2016年第2期31卷 165-176页

作者： shen Wan-qiang wang guo-zhao School of Science Jiangnan University Wuxi 214122 China Department of Mathematics Zhejiang University Hangzhou 310027 China State Key Lab of CAD & CG Zhejiang University Hangzhou 310027 China.

The existing results of curve degree elevation mainly focus on the degree of algebraic polynomials. The paper considers the elevation of degree of the trigonometric polynomial, from a Bezier curve on the algebraic polynomial space, to a C-Bezier curve on the algebraic and trigonometric polynomial space. The matrix of degree elevation is obtained by an operator presentation and a derivation pyramid. It possesses not a recursive presentation but a direct expression. The degree elevation process can also be represented as a corner cutting form.

关键词： Curve modeling Bezier curve C-Bezier curve Degree elevation Corner cutting.

Design and testing of a miniature silicon strip detector

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2020年第1期31卷 72-79页

作者： shen wang Wei Chen Jian-Hua guo Purple Mountain Observatory Chinese Academy of SciencesNanjing 210023China Key Laboratory of Dark Matter and Space Astronomy Chinese Academy of SciencesNanjing 210023China School of Astronomy and Space Science University of Science and Technology of ChinaNanjing 210023China University of Science and Technology of China Hefei 230026China University of Chinese Academy of Science Beijing 100049China

In this study, we developed a multi-channel lownoise electronic readout system for a silicon strip *** two charge-sensitive amplifier VA140 chips from IDEAS in Norway, the system has a wide linear dynamic input range of up to 180 fC for 128 channels with 0.16 fC average equivalent noise charge. In addition, we studied the charge distribution behaviors between adjacent silicon strips with the help of transient current technology.

关键词： SSD VA140 TCT Readout electronics