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Weighted composition operators from F(p,q,s) spaces to Bers-type spaces in the unit ball

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Applied Mathematics(A Journal of Chinese Universities) 2009年第4期24卷 462-472页

作者： lu xiao-fen Department of Mathematics Huzhou Teachers College Huzhou 313000 China

This paper deals with the boundedness and compactness of the weighted composition operators from the F（p, q, s） spaces, including Hardy space, Bergman space, Qp space, BMOA space, Besov space and α-Bloch space, to ... 详细信息

关键词： F(p q s) space Bers-type space weighted composition operator unit ball

Decentralized Optimal Control and Stabilization of Interconnected Systems With Asymmetric Information

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IEEE/CAA Journal of Automatica Sinica 2024年第3期11卷 698-707页

作者： Na Wang xiao Liang Hongdan Li xiao lu the College of Electrical Engineering and Automation Shandong University of Science and TechnologyQingdao 266000China the School of Automation and Electrical Engineering Linyi UniversityLinyi 276000China the College of Energy Storage Technology Shandong University of Science and TechnologyQingdao 266000China

The paper addresses the decentralized optimal control and stabilization problems for interconnected systems subject to asymmetric *** with previous work,a closed-loop optimal solution to the control problem and sufficient and necessary conditions for the stabilization problem of the interconnected systems are given for the first *** main challenge lies in three aspects:Firstly,the asymmetric information results in coupling between control and estimation and failure of the separation ***,two extra unknown variables are generated by asymmetric information(different information filtration)when solving forward-backward stochastic difference ***,the existence of additive noise makes the study of mean-square boundedness an *** adopted technique is proving and assuming the linear form of controllers and establishing the equivalence between the two systems with and without additive noise.A dual-motor parallel drive system is presented to demonstrate the validity of the proposed algorithm.

关键词： Asymmetric information decentralized control forwardbackward stochastic difference equations interconnected system stalibization

Masses and Sigma Terms of Pentaquarks in Chiral Perturbation Theory

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Communications in Theoretical Physics 2006年第4X期46卷 704-710页

作者： LI xiao-Ya lu xiao-Fu Department of Physics Sichuan University Chengdu 610064 China Institute of Theoretical Physics the Chinese Academy of Sciences Beijing 100080 China China Center of Advanced Science and Technology (World Laboratory) Beijing 100080 China

Assuming that the recently θ＋ and other exotic resonances belong to the pentaquark i0 of SU（3）I with J^P = 1/2, we constructed a relativistic effective lagrangian in the frame work of baryon chiral perturbation theory. The masses of pentaquarks under isospin symmetry is determined by calculating the propagator to one loop, where the extended on-mass-shell renormalization scheme is applied. Using the experimental data for masses of θ＋, Ξ and N, we estimated the mass of Σ and the a terms.

关键词： pentaquark chiral perturbation theory σ term

Experimental Study on Working Performance of Rice Rope Direct Seeding Machine

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Agricultural Sciences in China 2010年第2期9卷 275-279页

作者： lu xiao-rong lu xiao-lian REN Wen-tao College of Information & Engineering Sichuan Agricultural University Ya'an 625014 P.R.China Department of Electronics & Information Chuzhou College Chuzhou 239000 P.R.China College of Engineering Shenyang Agricultural University Shenyang 110161 P.R.China

Structure and sowing principles of rice rope direct seeding machine are introduced. In order to test the machine＇ s working performance, such as compacting effect, sowing depth, influence of sowing device to rice rope, etc., field experiments were conducted. It is concluded that mean slip ratio of compacting wheel 1 is 4.44%, wheel 2 is 5.58%, wheel 3 is 7.81%, and wheel 4 is 6.96%; mean depth of planting is 29.72 mm, and mean variability coefficient of planting depth is 6.39%. Maximum variability coefficient of planting depth is 8.40%. Rice rope＇s snapping is closely related with the machine＇s speed and guide thread wheel by sowing device orthogonal experiments. Test results show that the machine has a rational design, safe work and meets to the requirements of planting. This study has laid the foundation for further studying the project.

关键词： rice rope direct seeding machine slip ratio planting depth sowing device experiments

Compressive behavior and energy absorption of metal porous polymer composite with interpenetrating network structure

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中国有色金属学会会刊：英文版 2006年第B2期16卷 439-443页

作者： LIU Yu GONG xiao-lu Institut Charles Delaunay CNRS FRE 2848 LASMIS UTT 12 rue Marie Curie BP 2060 10010 Troyes France

Interpenetrating phase composites (IPCs) are a new class of composite materials with improved combinations of mechanical and physical properties. This study was performed on a new type of IPC called metal porous polymer composite (MPPC) with an interpenetrating network structure. Aluminum-polypropylene (AI-PE) and Aluminum-epoxy resin (Al-Ep) composites were produced by infiltrating the polymer in the aluminum foam. The composite microstructures were characterized using SEM observation. The compressive behavior and energy absorption characteristics of MPPC were investigated and compared with the aluminum foams. The compressive modulus of composite was compared with the VOIGT-REUSS bounds and HASHIN-SHTRIKMAN (H-S) bounds models. The experimental modulus of compressive tests falls well within the theoretical models.

关键词：金属多孔聚合物复合物互穿网络结构压缩行为能量吸收 MPPC复合物

Corrosion products of reverse crevice corrosion of copper

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International Journal of Minerals,Metallurgy and Materials 2011年第3期18卷 320-324页

作者： Lin lu xiao-gang Li School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

Open-circuit potential measurements and Raman spectroscopy were used to investigate the reverse crevice corrosion phenomenon and its corresponding corrosion products. With the aid of these techniques, the existence of reverse-crevice corrosion in copper was verified, i.e., while the surface of a crevice was corrosion free, the outside surface of the copper was attacked. The processes associated with this phe-nomenon were classified into three phases, and different compositions of the corrosion products were determined. Raman spectra showed that copper and Cu2O were found in the crevice, while CuO, Cu2O, and CuCl2 were the corrosion products on the bold surface. Based on these findings, a hypothesis relating to the three phases of reverse crevice corrosion has been proposed.

关键词： copper corrosion potential crevice corrosion corrosion products Raman spectroscopy

Acute obstructive fibrinous laryngotracheobronchitis induced by severe glyphosate surfactant intoxication: A case report

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World Journal of Emergency Medicine 2020年第2期11卷 125-126页

作者： Feng-lu Yang xiao lu Hangzhou Emergency Center Hangzhou 310010China Department of Emergency Medicine the Second Affi liated Hospital of Zhejiang University School of MedicineHangzhou 310009China

Dear editor,Glyphosate is a nonselective herbicide commonly used in agriculture *** targets the shikimate metabolic pathway,which is found in plants but not in ***,it is considered to be of low toxicity to humans,supported by the finding of high concentrations of oral and dermal LD50(>5,000 mg/kg body weight)of glyphosate in experimental animals.[1,2]Ingesting commercial formulations of glyphosate surfactant herbicide(GlySH),however,has been reported to be associated with various toxic effects,including gastrointestinal injury,laryngeal injury,impaired renal function,metabolic acidosis,arrhythmias.

关键词： surfactant impaired editor

Collapse simulation of a super high-rise building subjected to extremely strong earthquakes

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Science China(Technological Sciences) 2011年第10期54卷 2549-2560页

作者： lu xiao lu XinZheng ZHANG WanKai YE LiePing Department of Civil Engineering Tsinghua UniversityBeijing 100084China

In recent years, super high-rise buildings (>500 m) are developing very quickly and become an important frontier of civil engineering. The collapse resistance of super high-rise buildings subjected to extremely strong earthquake is a critical problem that must be intensively studied. This paper builds up a nonlinear finite element model of the tallest building in China, Shang- hai Tower (632 m), and proposes the modeling method and failure criteria for different structural elements. The dynamic char- acters of this building are then analyzed, and the possible failure modes and collapse processes due to earthquakes are pre- dicted, as well as the corresponding collapse mechanism. This work will be helpful in collapse prevention and the seismic design of super high-rise buildings.

关键词： super high-rise building collapse simulation extremely strong earthquake finite element method

Hydrothermal synthesis of Mn-Zn ferrites from spent alkaline Zn-Mn batteries

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Particuology 2009年第6期7卷 491-495页

作者： lu xiao Tao Zhou Jia Meng Institute of Chemical & Chemical Engineering Central South University Changsha 410083 Hunan China

Nanocrystalline Mn-Zn ferrites （***.4Fe204） with particle size of 12 nm were synthesized hydrotherreally using spent alkaline Zn-Mn batteries, and accompanied by a study of the influencing factors. The nanocrystals were examined by powder X-ray diffraction （XRD） for crystalline phase identification, and scanning electron microscopy （SEM） for grain morphology. The relationship between concentration of Fe（II）, Mn（II）, and Zn（II） and pH value was obtained through thermodynamic analysis of the Fe（II）-Mn（II）-Zn（II）-NaOH-H2O system. The results showed that all ions were precipitated completely at a pH value of 10-11. The optimal preparation conditions are： co-precipitation pH of 10.5, temperature of 200 ℃ and time of 9 h.

关键词： Spent alkaline batteries Ferrites Hydrothermal method Preparation