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Effect of Strong Basic Oxide（ li2O,Na2O,K2O and BaO）on Property of CaO-Based Flux

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Journal of Iron and Steel Research International 2003年第3期10卷 6-9页

作者： li gui-rong Jiangsu University

It is found that strong basic oxides including li2O,Na2O,K2O and BaO,which are used to replace a part of CaO in CaO-based fluxes,can lower the melting point and the viscosity and enhance the dephosphorizing ability. T... 详细信息

关键词： strong basic oxide CaO-based flux melting point viscosity dephosphorizing ability

Automated Dimensioning Method of Engineering Drawings for Mechanical Products Based on Curve Chain

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Computers, Materials & Continua 2020年第10期65卷 847-863页

作者： gui li Peng Yang Key Laboratory of Metallurgical Equipment and Control Technology Ministry of EducationWuhan University of Science and TechnologyWuhan430081China Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering Wuhan University of Science and TechnologyWuhan430081China

An automated method based on the curve chain was proposed for dimensioning of engineering drawings for the mechanical *** to the internal relation between the features of 3D model feature and elements of 2D drawing,the curve chain was established to reflect the geometric topological structure between the *** divides the dimensions into the absolute dimensions within the cure chain and the relative dimensions between the curve *** parallel and lengthy relationship between the drawing elements of the constructed X and Y parallel matrix was solved to remove redundant elements in the curve chain and labeled the absolute dimensions of the remaining valid *** average minimum weight coefficient was introduced to judge the dependence on the relative dimensions between curve *** the analysis of the overlap between the circular rectangular areas,including all the absolute dimensions of the curve chains,overlapping curve chains were merged,and their dimensions were rearranged to avoid the cross interference between *** method was seamlessly integrated into the drafting module of product design software NX,and it developed an automated dimensioning *** examples show that the system has excellent interactivity and robustness in the dimensioning of product engineering *** dimension information is complete,accurate and reliable.

关键词： Automated dimensioning engineering drawing curve chain mechanical product weight coefficient

A novel blind deconvolution algorithm using single frequency bin

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第8期8卷 1271-1276页

作者： ZHANG gui-bao li Jia-wen li Cong-xin National Die ＆ Mold CAD Engineering Research Center Shanghai Jiao Tong University Shanghai 200030 China

Former frequency-domain blind devolution algorithms need to consider a large number of frequency bins and recover the sources in different orders and with different amplitudes in each frequency bin,so they suffer from permutation and amplitude indeterminacy troubles. Based on sliding discrete Fourier transform,the presented deconvolution algorithm can directly recover time-domain sources from frequency-domain convolutive model using single frequency bin. It only needs to execute blind sepa-ration of instantaneous mixture once there are no permutation and amplitude indeterminacy troubles. Compared with former algorithms,the algorithm greatly reduces the computation cost as only one frequency bin is considered. Its good and robust per-formance is demonstrated by simulations when the signal-to-noise-ratio is high.

关键词： Blind deconvolution Single frequency bin Convolutive mixture

Research on the applications of infrared technique in the diagnosis and prediction of diesel engine exhaust fault

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Journal of Thermal Science 2011年第2期20卷 189-194页

作者： Lv Shi-gui Yang li Yang Qian Department of Power Engineering Naval University of Engineering Wuhan 430033 China

This paper mainly introduces the basic principles,the methods and the applications of infrared technique in the diagnosis and prediction of diesel engine exhaust faults. The test-bed for monitoring diesel engine exhaust faults by thermal infrared imager has been designed. In different running conditions, the exterior surface radiation temperatures of the exhaust pipe of the 6135G-1 diesel engine have been measured by infrared imaging system. According to the principle of infrared temperature measurement, the real temperatures of the exterior surface of the exhaust pipe have been calculated. Based on the principle of heat transfer, the method of calculating the exhaust temperatures according to the exterior surface radiation temperatures of exhaust pipe measured by thermal infrared imager is built. The relationship between diesel engine exhaust temperatures and faults has been analyzed. It is shown that the application of infrared inspection and diagnosis to the identifying of diesel engine exhaust faults is feasible and effective.

关键词： infrared exhaust temperature infrared diagnosis diesel engine fault

Numerical simulation study on penetration performance of depleted Uranium(DU)alloy fragments

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Defence Technology（防务技术） 2021年第1期17卷 50-55页

作者： Fu-lin Zhu Yang Chen gui-li Zhu Sichuan Aerospace System Engineering Institute Chengdu610100SichuanChina

Due to its high strength,high density,high hardness and good penetration capabilities,Depleted uranium alloys have already shined in armor-piercing *** should also be a lot of room for improvement in the application of fragment killing ***,regarding the performance of the depleted uranium alloy to penetrate the target plate,further investigation is needed to analyze its advantages and disadvantages compared to tungsten *** study the difference in penetration performance between depleted uranium alloy and tungsten alloy fragments,firstly,a theoretical analysis of the adiabatic shear sensitivity of DU and tungsten alloys was given from the perspective of material constitutive ***,taking the cylindrical fragment penetration target as the research object,the penetration process and velocity characteristics of the steel target plates penetrated by DU alloy fragment and tungsten alloy fragment were compared and analyzed,by using finite element software ANSYS/LS-DYNA and Lagrange ***,the influence of different postures when impacting target and different fragment shapes on the penetration results is carried out in the *** results show that in the penetration process of the DU and tungsten alloy fragments,the self-sharpening properties of the DU alloy can make the fragment head sharper and the penetrating ability *** the same conditions,the penetration capability of cylindrical fragment impacting target in vertical posture is better than that in horizontal posture,and the penetration capability of the spherical fragment is slightly better than that of cylindrical fragment.

关键词： Depleted uranium alloy Constitutive model Adiabatic shear Penetration performance Numerical simulation

Bianjing Spectacle: Soundscapes of Bianjing and Identities in Song Dynasty literature

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Frontiers of literary Studies in China-Selected Publications from Chinese Universities 2024年第1期18卷 77-102页

作者： li gui School of Humanities Shanghai Normal UniversityShanghai 200234China

By closely examining the literary works of the Song Dynasty,such as prose,poetry,rhyme-prose,lyrics,notes,and miscellaneous theses,this paper combines historical and literary evidence to rediscover the 13 types of soundscapes and their corresponding spaces in the Bianjing City,the capital of the Northern Song Dynasty,and it reveals the causes and historical-cultural significance of these *** on the key issues of soundscapes,this paper analyzes the sound spaces,identities,discourses,and literary achievements depicted in the writings about *** argues that the“Bianjing Spectacle”of vendors’cries described by the Southern Song people can be used as a summary of the soundscape characteristics of ***,it interprets the special silence,crying,and the absence of the sounds of production from an aesthetic *** rediscovering,analyzing,and interpreting the soundscapes of Bianjing,this paper reveals significant differences between the Tang and Song dynasties at the sound level and differentiates various“auditory communities.”It thereby demonstrates the portrayal of Bianjing in Song literature,addresses theoretical hot topics in literature and geography,and builds on Marx’s arguments to propose that a thorough understanding of history,the world,and ourselves requires an in depth study of the soundscapes in literature.

关键词： Song literature Bianjing in the Northern Song Dynasty soundscapes identities transformation during the Tang and Song dynasties

Effect of Induction Heat on Initial Solidification During Electromagnetic Continuous Casting of Steel

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Journal of Iron and Steel Research International 2010年第7期17卷 13-18页

作者： WANG Hong-ming li gui-rong Materials Science and Enginee1'ing School Jiangsu University Zhenjiang 212013 Jiangsu China

A three-dimensional finite element model of electromagnetic field and temperature field was developed to investigate the effects of induction heat of high frequency electromagnetic field on the early solidification process of molten *** results show that the increases of exciting current frequency make the effects of induction heat on solidification increase ***,the effects of induction heat on solidification process are weakened sharply with the increase of casting ***,when the casting speed exceeds a certain value,the effects of induction heat on solidification process are nearly negligible.

关键词： high frequency electromagnetic field induction heat initial solidification

Effect of Freeze-Thaw on Water Stability of Aggregates in a Black Soil of Northeast China

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Pedosphere 2014年第2期24卷 285-290页

作者： li gui-Yuan FAN Hao-Ming College of Water Conservancy Shenyang Agricultural University

Soil aggregate stability,an important index of the physical characteristics of a soil,can provide a good indication of a soil’s erodibility,and deserves special consideration in regions with cold *** objective of this study was to study the effect of freeze-thaw on soil water-stable aggregates in the black soil region of Northeast *** of a typical black soil in the region were collected to measure water-stable aggregates after freeze-thaw under different conditions(i.e.,initial moisture contents,freezethaw cycles and freezing temperatures)by wet-sieving into eight particle size groups(>10,10–6,6–5,5–3,3–2,2–1,1–0.5,and0.5–0.25 mm).Freeze-thaw had the most effect on aggregate stability when the samples had an initial moisture content of 400 g *** water-stable aggregates of the four larger particle size groups(>5,5–3,3–2,and 2–1 mm)reached a peak stability value,but those of the two smaller particle size groups(1–0.5 and 0.5–0.25 mm)reached a minimum value when the soil moisture content was 400 g ***-stable aggregates of the four larger particle size groups decreased while those of the two smaller particle size groups increased with the increase of freeze-thaw *** temperatures fell,the water-stable aggregates of the four larger particle size groups decreased while those of the two smaller particle size groups increased.

关键词： freezing temperature moisture content particle size water-stable aggregates

Bahadur Representation of Nonparametric M-Estimators for Spatial Processes

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Acta Mathematica Sinica,English Series 2008年第11期24卷 1871-1882页

作者： Jia CHEN De gui li li Xin ZHANG Department of Mathematics Zhejiang University Hangzhou 310027 P. R. China

Under some mild conditions, we establish a strong Bahadur representation of a general class of nonparametric local linear M-estimators for mixing processes on a random field. If the socalled optimal bandwidth hn = O（｜n｜^-1/5）, n ∈ Z^d, is chosen, then the remainder rates in the Bahadur representation for the local M-estimators of the regression function and its derivative are of order O（｜n｜^-4/5 log ｜n｜）. Moreover, we derive some asymptotic properties for the nonparametric local linear M-estimators as applications of our result.

关键词： Bahadur representation local linear M-estimator spatial processes strongly mixing