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Representations of coherent and squeezed states in an extended two-parameter Fock space

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Chinese Physics C 2012年第8期36卷 703-709页

作者： M. K. Tavassoly M. h. lake Atomic and Molecular Group Faculty of Physics Yazd University Yazd Iran Photonics Research Group Engineering Research Center Yazd University Yazd Iran

Recently an f -deformed Fock space which is spanned by ｜ n λ was introduced. These bases are the eigenstates of a deformed non-hermitian hamiltonian. In this contribution, we will use rather new nonorthogonal basis vectors for the construction of coherent and squeezed states, which in special case lead to the earlier known states. For this purpose, we first generalize the previously introduced Fock space spanned by ｜ n λ bases, to a new one, spanned by extended two-parameters bases ｜ n λ 1 ,λ 2 . These bases are now the eigenstates of a non-hermitian hamiltonian h λ 1 ,λ 2 = a λ 1 ,λ 2 a ＋ 1 2 , where a λ 1 ,λ 2 = a ＋ λ 1 a ＋ λ 2 and a are, respectively, the deformed creation and ordinary bosonic annihilation operators. The bases ｜ n λ 1 ,λ 2 are nonorthogonal （squeezed states）, but normalizable. Then, we deduce the new representations of coherent and squeezed states in our two-parameter Fock space. Finally, we discuss the quantum statistical properties, as well as the non-classical properties of the obtained states numerically.

关键词： coherent state squeezed state representation theory quantum statistics non-orthogonal bases

Trait plasticity, not values, best corresponds with woodland plant success in novel and manipulated habitats

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Journal of Plant Ecology 2013年第3期6卷 201-210页

作者： Robert J.Warren II Jeffrey K.lake Department of Biology SUNY Buffalo State1300 Elmwood AvenueBuffaloNY 14222USA Department of Biology Adrian CollegeAdrianMI49221USA

Aims The clustering of plants with similar leaf traits along environmental gradients may arise from adaptation as well as acclimation to het-erogeneous habitat *** the forces that shape plant leaf traits requires both linking variation in trait morphology with abiotic gradients and linking that trait variation with plant per-formance under varying abiotic *** the spectrum of plant types,shade-tolerant evergreen herbs are relatively low in trait plasticity,compared to deciduous and sun-adapted *** plants employ stress-tolerant strategies for survival,which coincide with relatively static trait morphologies,slow growth and hence a lower ability to adjust to changing environmental *** We investigate how the survival of two ecologically similar under-story evergreen species,Asarum arifolium and hepatica nobilis,cor-responds with variation in six commonly measured functional traits(leaf area,specific leaf area,plant height,leaf number,leaf length and shoot mass)along natural and experimental abiotic *** examine temporal(the period 2007-9)and spatial(100 km)variations in these traits after(i)translocating 576 plants across a span from the southerm Appalachian Mountains in NC,USA,to the Piedmont,GA,USA,which includes north-and south-facing slope habitats and(ii)the experimental manipulation of diffuse light and soil *** findings We find that when translocated into a novel habitats,with novel environmental conditions that often are more extreme than the source habitat,both species appear capable of considerable mor-phological acclimation and generally converge to similar trait *** nobilis does not exhibit mean trait values particu-larly different from those of ***,but it demonstrates much greater phenotypic *** results indicate that relatively conservative plant species nonetheless acclimate and survive across heterogeneous environmental conditions.

关键词： Functional traits Asarum arifolium hepatica nobilis niche specific leaf area understory

Predict Quality Management Future from Quality Management history

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Predict Quality Management Future from Quality Management Hi...

The effects of K^+ growth conditions on the accumulation of cesium by the bacterium Thermus sp. TibetanG6

中国质协2001年学术年会暨第二届中美质量管理交流研讨会

作者： lake h. T. Liang Lucent Technologies Qingdao Telecommunications, Systems, Ltd.

The author from a bran-new view of Physics’ Leverage Principle deeply analyzed the whole development history of quality management. The article not only clearly indicated that the emergence of each stage of quality management entirely comply with its inner developing rule, but also profoundly revealed the inevitable tendency of quality management development. The focus of quality management is gradually moved from "deploying audit after making" to "taking prevention before making", from "trying one’s best to ensure work result correct" to "giving one’s best effort to his correct work". Meanwhile, the article predicted that in new economic era, the emphasis of quality management will be moved from "product manufacturing quality" and SPC to the quality of understandings of customer requirement, the quality of operation of the supplier chain system and the quality of customer services. Besides continually taking the deployment of ISO9000 Standard and each traditional responsibility of quality management, in future quality professional will as a consultant involve in business process management, execution speed management, change management, function management and strategy management etc.

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Science China(Life Sciences) 2006年第2期49卷 123-129页

作者： WANG hailei1,2,3, KONG Fanjing1,2,3 & ZhENG Mianping1,2,3 1. R&D Center for Saline lake and Epithermal Deposits, Chinese Academy of Geological Sciences, Beijing 100037, China 2. Key Open Laboratory of Saline lake Resources and Environment, Chinese Academy of Geological Sciences, Beijing 100037, China 3. Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China R&D Center for Saline lake Epithermal Deposits Chinese Academy of Geological Sciences Beijing 100037 China Key Open Laboratory of Saline lake Resources Environment Chinese Academy of Geological Sciences Beijing 100037 China Institute of Mineral Resources Chinese Academy of Geological Sciences Beijing 100037 China

The accumulation of cesium by the bacterium Thermus sp. TibetanG6 was examined under different K+ growth conditions. The effects of external ph and Na+ on the accumulation of ce-sium were also studied, and the mechanism involved was discussed. K+ regimes played an important role in the accumulation of cesium by the strain TibetanG6. The quantity of cesium accumulated (24 h) was much higher in K+-deficient regime than that in K+-sufficient regime. The ph and Na+ had different effects on the accumulation of cesium in the two K+ regimes. IR spectra analyses indicated that the biosorption is a process of homeostasis with cesium initially accumulated on the cell wall.

关键词： Thermus sp. TibetanG6, cesium, bioaccumulation, K+-growth condition, ph, sodium, IR spectroscopy.

STUDIESOF MOLECULAR REORIENTATION OF A NON-SPhERICAL MOLECULE IN ThE LIQUID STATE BY DEPOLARIZED RAYLEIGh SCATTERING

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分子科学与化学研究 1982年第4期 43-54页

作者：王进贤 Department of Chemistry University of Utah Salt lake City Utah 84112 U.S.A.

Effects of orientational pair correlations on the reorientationrate of non-spherical molecules are *** Keyes-Kivelsonequation for the coherent light scattering relaxation time isderived using a different *** data on thecoherent light scattering relaxation time and the single parti-cle reorientation for n-butanol are obtained as a function ofthe concentration of *** results are compared withthe Stokes-Einstein-Debye equation and are discussed in termsof the orientational pair correlation effect.

关键词： STUDIESOF MOLECULAR REORIENTATION OF A NON-SPhERICAL MOLECULE IN ThE LIQUID STATE BY DEPOLARIZED RAYLEIGh SCATTERING SED

Dispersion of ultrafine alumina in modifier solution ——the role of polar interfacial interaction

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Journal of Central South University of Technology 2001年第1期8卷 18-23页

作者： hU Yue hua 1,QIU Guan zhou 1,J.D.Miller 2 (1.Department of Mineral Engineering, Central South University, Changsha 410083, China 2.Department of Metallurgical Engineering, University of Utah, 412 WBB, Salt lake City, UT 84112, USA) 1. Department of Mineral Engineering Central South University 410083 Changsha China 2. Department of Metallurgical Engineering University of Utah 412 WBB 84112 Salt Lake City UT USA

Dispersion of ultrafine alumina suspension is examined by using particle size analyzer. The zeta potential and contact angle measurements were used to discuss the electrokinetic behavior and surface wettability of alumina in modifier solution, and to calculate the electrostatic interaction forces and interfacial interaction forces between alumina particles. The aggregation of ultrafine alumina occurs near its PZC. Addition of modifier increases the zeta potential of alumina and its surface hydrophilicity, resulting in increase of electrostatic and hydration repulsion. It makes the suspension of ultrafine alumina completely dispersed. The average particle size of the suspension is decreased from 1.73 μm in absence of modifier to 0.8 μm in the presence of tripolyphosphate. According to polar interfacial interaction approach, the hydration forces responsible for the stability of alumina suspension in the presence of modifier have also been obtained. The extended DLVO theory is successful to describe the dispersion behavior of ultrafine alumina in modifier solution.

关键词： dispersion alumina modifier polar interfacial interaction extended DLVO theory

Composition and size dependent torsion fracture of metallic glasses

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Journal of Materials Science & Technology 2021年第23期82卷 153-160页

作者： J.Dong J.Shen Y.h.Sun h.B.Ke B.A.Sun W.h.Wang h.Y.Bai Institute of Physics Chinese Academy of SciencesBeijing100190PR China College of Materials Science and Opto Electronic Technology University of Chinese Academy of SciencesBeijing100049PR China Songshan lake Materials Laboratory DongguanGuangdong523808PR China

The fracture of metallic glasses(MGs)of different compositions and sizes down to micrometers under torsion loading were systematically *** to the flat shear fracture along the circumferential plane as commonly supposed under torsion,we find that the torsion fracture of metallic glasses can deviate from flat shear plane,and the fracture angle is closely dependent on the composition and the size of MG *** a conversion method,we show that the torsion fracture of both millimeterand micrometer-sized MGs can be described by the ellipse fracture criterion as originally proposed for the tension *** deviation from the circumferential shear plane under torsion is further shown to intrinsically relate to the fracture toughness of *** tougher MG tends to have a smaller fracture angle with respect to the maximum shear plane,and vice versa,indicating a correlation between the fracture toughness and pressure/normal stress sensitivity in *** results provide new insights on the fracture mechanism and are helpful to design and control the deformation and fracture behavior of MGs under torsion loading.

关键词： Metallic glasses Torsion fracture Pressure sensitivity Fracture toughness

Microstructural evolution and superelastic properties of ultrafine-graine d NiTi-base d shape memory alloy via sintering of amorphous ribbon precursor

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Journal of Materials Science & Technology 2023年第7期138卷 80-92页

作者： W.S.Cai h.Z.Lu h.Z.Li Z.Liu h.B.Ke W.h.Wang C.Yang National Engineering Research Center of Near-net-shape Forming for Metallic Materials Guangdong Provincial Key Laboratory for Processing and Forming of Advanced Metallic MaterialsSouth China University of TechnologyGuangzhou 510640China Songshan lake Materials Laboratory Dongguan 523808China Institute of Physics Chinese Academy of SciencesBeijing 100190China

NiTi-based shape memory alloys(SMAs)are considered as cutting-edge intelligent functional ***,it remains a great challenge to obtain ultrafine-grained(UFGed)bulk materials with mm-scale size as well as outstanding superelastic ***,UFGed bulk Ti_(35)Zr_(15)Ni_(35)Cu_(15)NiTi-based SMA is successfully prepared via spark plasma sintering of amorphous ribbon precursor at different sintering temperatures,and microstructural evolution and superelastic properties are symmetrically *** is found that its grain size ranges from UFG to micro-grain with increased sintering temperature regard-less of the predominant B2 matrix in all bulk ***,the orientation relationships between B2 matrix and nano-scale fcc(Ti,Zr)_(2)Ni precipitate evolve from coherent to ***,the UFGed samples exhibit perfect superelasticity with the high recoverable strain of∼5.8%,the stable recov-ery rate above 99%,and the great critical stress inducing martensitic transformation higher than 1 GPa,far superior to the corresponding ones of suction-cast micro-grained TiZrNiCu ***,the perfect superelasticity is attributed to the good resistance to dislocation slip or grain boundary slip by residual nano-scale amorphous phase or secondary phase of coherent and semi-coherent fcc(Ti,Zr)_(2)Ni *** addition,the gentle superelastic plateau is associated to the favorable transfer stress and the strong ability to accommodate dislocation movement,which is generated by the coherent interface between nano-scale fcc(Ti,Zr)_(2)Ni and UFGed B2 *** results suggest that spark plasma sintering of amorphous alloy precursor is a feasible route to obtaining excellent superelasticity in NiTi-based SMAs.

关键词： Shape memory alloy Amorphous alloy Microstructure Superelasticity

Marinoan glaciation in the Indian subcontinent——Anatomy and global implications

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Journal of Palaeogeography 2024年第2期13卷 293-308页

作者： h.N.Bhattacharya Department of Earth Sciences Techno India UniversityWest BengalSector VSalt LakeKolkata700091India

Detailed sedimentological analysis of the Pokaran Boulder Bed,representing the most basal unit of the Neoproterozoic-Lower Cambrian Marwar Supergroup,clearly indicates its glacial *** glacial sediments are interpreted as an ice-contact submarine fan *** on the detrital and inherited zircon population of the Marwar Supergroup sediments and interlayered pyroclastic deposits,a Marinoan cryochron of the Cryogenian Period is envisaged for the Pokaran Boulder *** well-preserved Ediacaran elements in the post-glacial sedimentary succession also support a Cryogenian to Early Cambrian age of the Marwar *** glacial deposition at the base of the Marwar Supergroup strengthens the regional correlation between the studied sediments with the Lesser himalayan Blaini-Krol-Tal sediments and the haqf Supergroup of *** available zircon ages and paleomagnetic data of the Malani Igneous suite,along with the Marinoan glacial deposits,detrital zircon ages,and Ediacaran fossil elements of the Marwar Supergroup add significant information to the Neoproterozoic Earth history.

关键词： Neoproterozoic Marinoan glaciation Diamictites Pokaran Boulder Bed Marwar Supergroup