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Dynamic modeling of spatial variable stator vane mechanism using modified Lagrange multiplier method 认领 引用 被引量：1
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作者 Ke HE Kaiyi HUANG +2 位作者 Zhen LI Shuhui HU Zhinan ZHANG 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2026年第6期251-271,共21页
The Variable Stator Vanes(VSV)system ensures the smooth operation of the highpressure compressor by adjusting the vane angles to prevent surge,and the dynamic behavior of its multistage vanes directly affects its serv... The Variable Stator Vanes(VSV)system ensures the smooth operation of the highpressure compressor by adjusting the vane angles to prevent surge,and the dynamic behavior of its multistage vanes directly affects its service performance.To investigate the dynamic behavior of the spatial VSV multi-vane mechanism,a positional constraint equation for the VSV mechanism was established,and the numerical expressions of the Jacobian matrices for different kinematic pair constraint equations were derived.The Lagrange multiplier method was modified for spatial rotation,and an ideal dynamic model of the spatial VSV multi-vane mechanism was developed.The computational results indicate that the dynamic behavior of different vanes within the same stage is similar,and the constraint moment experienced by vanes at different positions has a linear relationship with their centroid coordinates.This study expands the dynamic modeling methods for spatial mechanisms and provides a foundation for researching the frictional dynamic behavior of VSV mechanisms with clearance. 展开更多
关键词 Dynamic characteristics Dynamic models Lagrange multipliers Spatial dynamic modeling:VSV
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A partitioned method for a water-sediment-foundation-dam system response based on a generalized saturated porous medium model and localized Lagrange multipliers 认领 引用
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作者 Zhang Jiao Chen Shaolin +1 位作者 Liu Hongquan Zhang Yanhong 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2026年第3期663-682,共20页
The seismic analysis of an open water-sediment-foundation-dam(WSFD)system can be decomposed into a free-field problem for an auxiliary system and an interaction problem for a bounded WSFD system.Both of them involve c... The seismic analysis of an open water-sediment-foundation-dam(WSFD)system can be decomposed into a free-field problem for an auxiliary system and an interaction problem for a bounded WSFD system.Both of them involve complex wave coupling problems across multiple different media.This study develops a partitioned method and integrates a 2D-3D finite element procedure,based on a generalized saturated porous medium(GSPM)model and a novel localized Lagrange multipliers(LLM)method.The GSPM model fundamentally eliminates multi-solver coupling through a unified representation of heterogeneous media.The novel LLM method enables simultaneous interaction of multiple different media,transcending the inherent limitations in classical fluid-solid interface treatments.In implementation,a more realistic input for the bounded system is provided by computing the free-field for the auxiliary system using the 2D procedure,reducing numerical errors caused by multi-transmitting boundary.The accuracy of the partitioned method is examined through numerical simulations of an idealized dam-reservoir-foundation system,with results compared against those obtained from the direct method.Finally,the effects of sediment and nonlinearity on dam are investigated by augmenting a plastic-damage constitutive module. 展开更多
关键词 water-sediment-foundation-dam system generalized saturated porous medium model localized Lagrange multipliers partitioned analysis seismic response analysis
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HPBOUNDEDNESS OF SPECTRAL MULTIPLIERS ON HEISENBERG GROUPS 认领 引用
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作者 Nan HU Jiman ZHAO 《Acta Mathematica Scientia》 SCIE CSCD 2026年第3期1037-1053,共17页
In this paper,on Heisenberg group,we consider a spectral multiplier theorem on Hardy spaces Hp.By replacing the usual Sobolev space Ls2by the locally largest Lorentz-Sobolev space Lsp,q,we make an estim... In this paper,on Heisenberg group,we consider a spectral multiplier theorem on Hardy spaces Hp.By replacing the usual Sobolev space Ls2by the locally largest Lorentz-Sobolev space Lsp,q,we make an estimate of the kernel function of spectral multipliers with a Lorentz-Sobolev norm.Then we prove a Hörmander type multiplier theorem for spectral multiplier on Hardy spaces Hpwith 0<p≤∞. 展开更多
关键词 spectral multiplier Heisenberg group Sobolev space Lorentz space
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CHARACTERIZATION OF RESIDUATED LATTICES VIA MULTIPLIERS 认领 引用 被引量：3
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作者 Wei WANG Bin ZHAO 《Acta Mathematica Scientia》 SCIE CSCD 2022年第5期1902-1920,共19页
In the paper,we introduce some of multipliers on residuated lattices and investigate the relations among them.First,basing on the properties of multipliers,we show that the set of all multiplicative multipliers on a r... In the paper,we introduce some of multipliers on residuated lattices and investigate the relations among them.First,basing on the properties of multipliers,we show that the set of all multiplicative multipliers on a residuated lattice A forms a residuated lattice which is isomorphic to A.Second,we prove that the set of all total multipliers on A is a Boolean subalgebra of the residuated lattice(which is constituted by all multiplicative multipliers on A)and is isomorphic to the Boolean center of A.Moreover,by partial multipliers,we study the maximal residuated lattices of quotients for residuated lattices.Finally,we focus on principal implicative multipliers on residuated lattices and obtain that the set of principal implicative multipliers on A is isomorphic to the set of all multiplicative multipliers on A under the opposite(dual)order. 展开更多
关键词 residuated lattice multiplier M-multiplier PI-multiplier T-multiplier
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Development of a ceramic gas-electron-multiplier neutron detector prototype with a large sensitive area 认领 引用
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作者 Lin Zhu Jianrong Zhou +13 位作者 Xiaojuan Zhou Lixin Zeng Liang Xiao Hong Xu Fei Jia Chaoyue Zhang Yezhao Yang Dingfu Li Hao Xiong Yuguang Xie Yubin Zhao Yadong Wei Zhijia Sun Yuanbo Chen 《Chinese Physics B》 SCIE EI CAS CSCD 2025年第9期135-141,共7页
The rapid growth of neutron flux has driven the development of3He-free neutron detectors to satisfy the requirements of the neutron scattering instruments under construction or planned at the China Spallation Neutr... The rapid growth of neutron flux has driven the development of3He-free neutron detectors to satisfy the requirements of the neutron scattering instruments under construction or planned at the China Spallation Neutron Source(CSNS).Position-sensitive neutron detectors with a high counting rate and large area play an important role in the instruments performing neutron measurements in or close to the direct beam.The ceramic gas-electron-multiplier(GEM)detector serves as a promising solution,and considerable work has been done using the small-area GEM neutron detectors.In this article,we designed and constructed a detector prototype utilizing ceramic GEM foils with an effective area of about307 mm×307 mm.To evaluate and investigate their basic characteristics,the Monte Carlo(MC)tool FLUKA was employed and several neutron beam tests were conducted at CSNS.The simulated spatial resolution was basically in agreement with the measured value of 2.50±0.01 mm(FWHM).The wavelength spectra measurement was verified through comparisons with a commercial beam monitor.In addition,a detection efficiency of 4.7±0.1%was achieved for monoenergetic neutrons of 1.59 A wavelength.This is consistent with the simulated result.The results indicate that the large-area ceramic GEM detector is a good candidate to implement neutron beam measurements.Its efficiency can be improved in a cascading manner to approach that reached by traditional3He detectors. 展开更多
关键词 neutron detector counting rate gas electron multiplier spatial resolution detection efficiency
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Anti-Derivations and Anti-Left Multipliers on Some Algebras 认领 引用
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作者 Shuhan LIU Shan LI Jiankui LI 《Journal of Mathematical Research with Applications》 CSCD 2025年第6期735-744,共10页
In this paper,we study anti-derivations and anti-left multipliers.For a class of algebras,which contains triangular algebras,matrix algebras,embedded algebras,Cuntz algebras,nest algebras,P-lattice algebras,and linear... In this paper,we study anti-derivations and anti-left multipliers.For a class of algebras,which contains triangular algebras,matrix algebras,embedded algebras,Cuntz algebras,nest algebras,P-lattice algebras,and linear transformation algebras L(X),we show that every anti-left multiplier on these algebras is zero.Furthermore,let A be a zero product determined algebra andδbe a linear mapping from A into itself,satisfying that for any a,b in A,ab=0 impliesδ(b)a+bδ(a)=0.We show thatδ(x)=D(x)+δ(1)x,where D is an anti-derivation andδ(1)∈Z(A). 展开更多
关键词 anti-derivation anti-left multiplier matix algebra
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Empirical analysis on China money multiplier 认领 引用
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作者 SHANG Hua-juan 《Chinese Business Review》 2009年第8期43-49,共7页
The paper firstly represents two kind statements of China money multipliers and theoretically analyzes the relationship between each structure factor and China money multiplier. Secondly, it summarizes the several fea... The paper firstly represents two kind statements of China money multipliers and theoretically analyzes the relationship between each structure factor and China money multiplier. Secondly, it summarizes the several features and the move trends of China narrow and broad money multipliers and their structure factors. Thirdly, the paper empirically analyzes how and what degree the each structure factor affects China narrow and broad money multipliers holding everything else constant. At last two important conclusions are got, that is, the required reserve ratio is the most associated with China money multipliers and the saving deposit ratio is more associated with that, the required reserve ratio and the interest rates can be used as the ways of affecting money aggregate by the People＇s Bank of China. 展开更多
关键词 empirical analysis China money multiplier narrow money multiplier broad money multiplier structure factors of China money multiplier
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Compressing and expanding optical matrix-vector multipliers for enabling optical image encoder-decoders and generators 认领 引用
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作者 Adrian Stern 《Light: Science & Applications》 SCIE EI CAS CSCD 2026年第2期363-365,共3页
Both compressing and expanding optical matrix-vector multipliers are necessary for the full optical realization of neural networks.An expanding multiplier scheme is proposed,which,together with common compressing mult... Both compressing and expanding optical matrix-vector multipliers are necessary for the full optical realization of neural networks.An expanding multiplier scheme is proposed,which,together with common compressing multipliers,is employed to demonstrate image processor networks such as autoencoders and image generators. 展开更多
关键词 neural networksan common compressing multipliersis image generators full optical realization optical matrix vector multipliers image processor networks compressing multipliers expanding multiplier
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Bus Encoded LUT Multiplier for Portable Biomedical Therapeutic Devices 认领 引用 被引量：3
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作者 R.Praveena S.Nirmala 《Computers, Materials & Continua》 SCIE EI 2017年第1期37-47,共11页
DSP operation in a Biomedical related therapeutic hardware need to beperformed with high accuracy and with high speed. Portable DSP hardware’s likepulse/heart beat detectors must perform with reduced operational powe... DSP operation in a Biomedical related therapeutic hardware need to beperformed with high accuracy and with high speed. Portable DSP hardware’s likepulse/heart beat detectors must perform with reduced operational power due to lack ofconventional power sources. This work proposes a hybrid biomedical hardware chip inwhich the speed and power utilization factors are greatly improved. Multipliers are thecore operational unit of any DSP SoC. This work proposes a LUT based unsignedmultiplication which is proven to be efficient in terms of high operating speed. For n bitinput multiplication n*n memory array of 2 n bit size is required to memorize all thepossible input and output combination. Various literature works claims to be achieve highspeed multiplication with reduced LUT size by integrating a barrel shifter mechanism.This paper work address this problem, by reworking the multiplier architecture with aparallel operating pre-processing unit which used to change the multiplier and multiplicandorder with respect to the number of computational addition and subtraction stages required.Along with LUT multiplier a low power bus encoding scheme is integrated to limit the powerconstraint of the on chip DSP unit. This paper address both the speed and power optimizationtechniques and tested with various FPGA device families. 展开更多
关键词 Constant coefficient multipliers reduced coefficient multipliers bus encoding DSP SoC look up table barrel shifter pre-processing
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Images of triple gas electron multiplier with pixel-pads 认领 引用 被引量：7
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作者 董静 胡碧涛 +1 位作者 陈元柏 谢一冈 《Chinese Physics B》 SCIE EI CAS 2009年第10期4229-4233,共5页
Testing of a triple gas electron multiplier （GEM） with pixel-pads is described. Images by scanning and suspending radioactive sources were obtained by using 96 channels digital data acquisition （DAQ） system which ... Testing of a triple gas electron multiplier （GEM） with pixel-pads is described. Images by scanning and suspending radioactive sources were obtained by using 96 channels digital data acquisition （DAQ） system which was composed of 96 8×8 mm2 pads and associated electronics channels. 展开更多
关键词 gas electron multiplier images digital data acquisition system
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Accelerated Matrix Recovery via Random Projection Based on Inexact Augmented Lagrange Multiplier Method 认领 引用 被引量：4
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作者 王萍 张楚涵 +1 位作者 蔡思佳 李林昊 《Transactions of Tianjin University》 EI CAS 2013年第4期293-299,共7页
In this paper, a unified matrix recovery model was proposed for diverse corrupted matrices. Resulting from the separable structure of the proposed model, the convex optimization problem can be solved efficiently by ad... In this paper, a unified matrix recovery model was proposed for diverse corrupted matrices. Resulting from the separable structure of the proposed model, the convex optimization problem can be solved efficiently by adopting an inexact augmented Lagrange multiplier (IALM) method. Additionally, a random projection accelerated technique (IALM+RP) was adopted to improve the success rate. From the preliminary numerical comparisons, it was indicated that for the standard robust principal component analysis (PCA) problem, IALM+RP was at least two to six times faster than IALM with an insignificant reduction in accuracy; and for the outlier pursuit (OP) problem, IALM+RP was at least 6.9 times faster, even up to 8.3 times faster when the size of matrix was 2 000×2 000. 展开更多
关键词 matrix recovery random projection robust principal component analysis matrix completion outlier pursuit inexact augmented Lagrange multiplier method
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BILINEAR SPECTRAL MULTIPLIERS ON HEISENBERG GROUPS 认领 引用 被引量：3
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作者 Naiqi SONG Heping LIU Jiman ZHAO 《Acta Mathematica Scientia》 SCIE CSCD 2021年第3期968-990,共23页
As we know,thus far,there has appeared no definition of bilinear spectral multipliers on Heisenberg groups.In this article,we present one reasonable definition of bilinear spectral multipliers on Heisenberg groups and... As we know,thus far,there has appeared no definition of bilinear spectral multipliers on Heisenberg groups.In this article,we present one reasonable definition of bilinear spectral multipliers on Heisenberg groups and investigate its boundedness.We find some restrained conditions to separately ensure its boundedness from C0(Hn)×L2(Hn)to L2(Hn),from L2(Hn)×C0(Hn)to L2(Hn),and from Lp×Lq to Lr with 2<p,q<∞,2≤r≤∞. 展开更多
关键词 Bilinear spectral multipliers Heisenberg groups boundedness
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ON SOME GENERALIZED DIFFERENCE PARANORMED SEQUENCE SPACES ASSOCIATED WITH MULTIPLIER SEQUENCE DEFINED BY MODULUS FUNCTION 认领 引用 被引量：5
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作者 Binod Chandra Tripathy Prabhat Chandra 《Analysis in Theory and Applications》 2011年第1期21-27,共7页
In this article we introduce the paranormed sequence spaces （f,A, Am,p）, c0（f,A,Am,p） and L00（f,A, Am,p）, associated with the multiplier sequence ∧ = （hk）, defined by a modulus function f. We study their diff... In this article we introduce the paranormed sequence spaces （f,A, Am,p）, c0（f,A,Am,p） and L00（f,A, Am,p）, associated with the multiplier sequence ∧ = （hk）, defined by a modulus function f. We study their different properties like solidness, symmetricity, completeness etc. and prove some inclusion results. 展开更多
关键词 paranorm solid space symmetric space difference sequence modulus function multiplier seuence
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Missile robust gain scheduling autopilot design using full block multipliers 认领 引用 被引量：3
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作者 Jianqiao Yu Guanchen Luo Wentao Yin 《Journal of Systems Engineering and Electronics》 SCIE EI 2010年第5期883-891,共9页
Reduction of conservatism is one of the key and difficult problems in missile robust gain scheduling autopilot design based on multipliers.This article presents a scheme of adopting linear parameter-varying（LPV） con... Reduction of conservatism is one of the key and difficult problems in missile robust gain scheduling autopilot design based on multipliers.This article presents a scheme of adopting linear parameter-varying（LPV） control approach with full block multipliers to design a missile robust gain scheduling autopilot in order to eliminate conservatism.A model matching design structure with a high demand on matching precision is constructed based on the missile linear fractional transformation（LFT） model.By applying full block S-procedure and elimination lemma,a convex feasibility problem with an infinite number of constraints is formulated to satisfy robust quadratic performance specifications.Then a grid method is adopted to transform the infinite-dimensional convex feasibility problem into a solvable finite-dimensional convex feasibility problem,based on which a gain scheduling controller with linear fractional dependence on the flight Mach number and altitude is derived.Static and dynamic simulation results show the effectiveness and feasibility of the proposed scheme. 展开更多
关键词 full block multiplier gain scheduling control robust control model matching autopilot.
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CARLESON MEASURES,RIEMANN-STIELTJES OPERATORS AND MULTIPLIERS ON F(p,q,s)SPACES IN THE UNIT BALL OF C^n 认领 引用 被引量：3
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作者 彭茹 吴悠 邓方文 《Acta Mathematica Scientia》 SCIE CSCD 2016年第3期635-654,共20页
This paper is devoted to characterizing the Riemann-Stieltjes operators and pointwise multipliers on F（p, q, s） spaces in the unit ball of C^n which contain many classical function spaces, such as the Bloch space, B... This paper is devoted to characterizing the Riemann-Stieltjes operators and pointwise multipliers on F（p, q, s） spaces in the unit ball of C^n which contain many classical function spaces, such as the Bloch space, BMOA and Q8 spaces. The boundedness and compactness of these operators on F（p, q, s） spaces are characterized by means of an embedding theorem, i.e., F（p,q, s） spaces boundedly embedded into the tent-type spaces Tp,s^∞（μ） 展开更多
关键词 Carleson measures F（p, q, s） spaces tent-type spaces Riemann-Stieltjes operators multipliers
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Amplification process of a gas electron multiplier simulated by PIC-MCC model 认领 引用 被引量：1
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作者 YANG Lanlan TU Yan +4 位作者 Harm Tolner ZHONG Xuefei ZHANG Panpan QIN Nana MA Shanle 《Nuclear Science and Techniques》 SCIE CAS CSCD 2012年第4期203-208,共6页
The performance of a single gas electron multiplier(GEM)in pure Xe at an atmospheric pressure is investigated by Particle in Cell-Monte Carlo Collision(PIC-MCC)model.The micro development processes with electrons and ... The performance of a single gas electron multiplier(GEM)in pure Xe at an atmospheric pressure is investigated by Particle in Cell-Monte Carlo Collision(PIC-MCC)model.The micro development processes with electrons and ions distributions in space have been revealed.Based on the micro development processes,the macroscopic parameters such as GEM gain and the effective efficiency have also been obtained.The simulation results indicate that after tens of nanoseconds,electrons are collected by the readout electrode while the ions still exist in the gas space for several microseconds.The main signal current is formed by the electrons arriving at the readout electrode,but electrons and ions are also collected by the copper electrodes near the GEM hole and the thin Kapton film boundary.The simulated gain of GEM exponentially increases with the applied GEM voltage.With the PIC-MCC simulations,both the physical amplification and charging mechanisms in the GEM device can be well understood,which is beneficial to the device design. 展开更多
关键词 Gas electron multiplier Particle in Cell-Monte Carlo Collision Gain
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L-R smash products for multiplier Hopf algebras 认领 引用 被引量：3
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作者 ZHAO Li-hui LU Di-ming FANG Xiao-li 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE 2008年第1期83-90,共8页
The theory of L-R smash product is extended to multiplier Hopf algebras and a sufficient condition for L-R smash product to be regular multiplier Hopf algebras is given. In particular, the result of the paper implies ... The theory of L-R smash product is extended to multiplier Hopf algebras and a sufficient condition for L-R smash product to be regular multiplier Hopf algebras is given. In particular, the result of the paper implies Delvaux＇s main theorem in the case of smash products. 展开更多
关键词 multiplier Hopf algebral bimodule bialgebra L-R smash product.
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Local curve fitting based Lagrange multiplier selection for Id-slice in multi-view video coding 认领 引用 被引量：1
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作者 Shi-fang XU Guo-bin CHEN +1 位作者 Hua-dong PAN Ji-lin LIU 《Journal of Zhejiang University-SCIENCE A》 SCIE EI CAS 2009年第6期778-785,共8页
The rate and distortion of Id-slice do not fit the globally linear relationship on a logarithmic scale. Lagrange multiplier selection methods based on the globally linear approximate relationship are neither efficient... The rate and distortion of Id-slice do not fit the globally linear relationship on a logarithmic scale. Lagrange multiplier selection methods based on the globally linear approximate relationship are neither efficient nor optimal for multi-view video coding (MVC). To improve the coding efficiency of MVC, a local curve fitting based Lagrange multiplier selection method is proposed in this paper, where Lagrange multipliers are selected according to the local slopes of the approximate curves. Experi-mental results showed that the proposed method improves the coding efficiency. Up to 2.5 dB gain was achieved at low bitrates. 展开更多
关键词 Id-slice Lagrange multiplier Local curve fitting Multi-view video coding （MVC）
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REDUCIBILITY FOR A CLASS OF ANALYTIC MULTIPLIERS ON SOBOLEV DISK ALGEBRA 认领 引用 被引量：1
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作者 Yong CHEN Ya LIU Chuntao QIN 《Acta Mathematica Scientia》 SCIE CSCD 2021年第2期361-370,共10页
We prove the reducibility of analytic multipliers Mφwith a class of finite Blaschke products symbolφon the Sobolev disk algebra R(D).We also describe their nontrivial minimal reducing subspaces.
关键词 Reducing subspace multiplier finite Blaschke product Sobolev disk algebra
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SOME MULTIPLIER THEOREMS FOR ANISOTROPIC HARDY SPACES——In Memory of Professor Yongsheng Sun 认领 引用 被引量：2
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作者 Yong Ding Senhua Lan 《Analysis in Theory and Applications》 2006年第4期339-352,共14页
Let A be a symmetric expansive matrix and H^p（R^n） be the anisotropic Hardy space associated with A. For a function m in L∞（R^n）, an appropriately chosen function η in Cc^∞（R^n） and j ∈ Z define mj（ξ） = m... Let A be a symmetric expansive matrix and H^p（R^n） be the anisotropic Hardy space associated with A. For a function m in L∞（R^n）, an appropriately chosen function η in Cc^∞（R^n） and j ∈ Z define mj（ξ） = m（A^jξ）η（ξ）. The authors show that if 0 〈 p 〈 1 and mj belongs to the anisotropic nonhomogeneous Herz space K1^1/P^-1,p（R^n）, then m is a Fourier multiplier from H^p（R^n） to L^V（R^n）. For p = 1, a similar result is obtained if the space K1^0.1（R^n） is replaced by a slightly smaller space K（w）. Moreover, the authors show that if 0 〈 p 〈 1 and if the sequence {（mj）^v} belongs to a certain mixednorm space, depending on p, then m is also a Fourier multiplier from H^p（R^n） to L^v（R^n）. 展开更多
关键词 anisotropic Hardy space anisotropic Herz space Fourier multiplier
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