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Search Results: 1 - 10 of 62339 matches for " Jian Xiao "
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On strongly Gauduchon metrics of compact complex manifolds
Jian Xiao
Mathematics , 2013, DOI: 10.1007/s12220-014-9502-5
Abstract: In this paper, we study strongly Gauduchon metrics on compact complex manifolds. We study the cohomology cones SG in the de Rham cohomology groups generated by all strongly Gauduchon metrics and its direct images under proper modifications. We also study the moduli of strongly Gauduchon manifolds. We prove an existence result of strongly Gauduchon metrics on compact complex manifold which is fibred over a compact complex curve. In particular, if a compact complex manifold X has a topologically essential fibration over a compact complex curve, and if the generic fibres satisfy ddbar-lemma, then X admits strongly Gauduchon metrics.
Characterizing volume via cone duality
Jian Xiao
Mathematics , 2015,
Abstract: For divisors over smooth projective varieties, we show that the volume can be characterized by the duality between pseudo-effective cone of divisors and movable cone of curves. Inspired by this result, we give and study a natural intersection-theoretic volume functional for 1-cycles over compact K\"ahler manifolds. In particular, for numerical equivalence classes of curves over projective varieties, it is closely related to the mobility functional.
A remark on the convergence of inverse $σ_k$-flow
Jian Xiao
Mathematics , 2015,
Abstract: We study the positivity of related cohomology classes concerning the convergence problem of inverse $\sigma_k$-flow in the conjecture proposed by Lejmi and Sz\'{e}kelyhidi.
Weak transcendental holomorphic Morse inequalities on compact K?hler manifolds
Jian Xiao
Mathematics , 2013,
Abstract: Transcendental holomorphic Morse inequalities aim at characterizing the positivity of transcendental cohomology classes of type $(1,1)$. In this paper, we prove a weak version of Demailly's conjecture on transcendental Morse inequalities on compact K\"ahler manifolds. And as a consequence, we partially improve a result of Boucksom-Demailly-Paun-Peternell.
Movable Intersection And Bigness Criterion
Jian Xiao
Mathematics , 2014,
Abstract: In this note, we give a Morse-type bigness criterion for the difference of two pseudo-effective $(1,1)$-classes by using movable intersections. And with this result we give a Morse-type bigness criterion for the difference of two movable $(n-1,n-1)$-classes.
DETERMINATION OF NINE COMPONENTS IN BAYER LIQUORS BY HIGH PERFORMANCE ION CHROMATOGRAPHY WITH CONDUCTIVITY DETECTOR
XIAO,JIAN BO;
Journal of the Chilean Chemical Society , 2006, DOI: 10.4067/S0717-97072006000300007
Abstract: a high performance ion chromatographic (hpic) method for the determination of nine components in bayer liquors was reported. formic, acetic, propionic, oxalic, succinic, glutaric anion, f-, cl-, and so42- were separated and determined by high performance ion chromatography with conductivity detector. the analytes were removed from bayer liquor by using an ion-exchange resin column. the chromatographic separation was achieved with only one ionpac as11-hc column thermostated at 30 °c. the precision results showed that the repeatability and reproducibility were <2.94 and <1.37%, respectively. the accuracy of the method was assessed by the recoveries ranging from 86.3 to 105.6 %. under optimum conditions the detection limits ranged from 0.008 to 0.053 mg/l
Anti-synchronization of a new hyperchaotic system via small-gain theorem

Xiao Jian,

中国物理 B , 2010,
Abstract: Based on the small-gain theorem, the anti-synchronization between two identical new hyperchaotic systems is investigated, moreover, the general sufficient conditions to achieve anti-synchronization between the new hyperchaotic system and the new hyperchaotic Lorenz system are obtained via small-gain theorem. Numerical simulations are performed to verify and illustrate the analytical results.
Triangular Resonator Bandpass Filter with Tunable Operation
Jian-Kang Xiao
PIER Letters , 2008, DOI: 10.2528/PIERL08010606
Abstract: Triangular patch resonator bandpass filters with tunable operation are developed to perform nicer filter properties of low passband insertion loss, transmission zeros and wide stopband. With tunable fractal-shaped defection acts as perturbation, filter operation frequency and operation band can be controlled, and the responses of undesired resonant modes are greatly weakened even suppressed. The new design can bring filters more operation without changing the dielectric substrate or patch size. The designed filters have outstanding advantages of single patch with compact size and without resonator coupling gaps, simple circuit topology, nicer performances, miniaturization and can be easily tuned for more applications. All these features are well popular for wireless communication systems.
Aquachlorido{μ-6,6′-diethoxy-2,2′-[1,2-phenylenebis(nitrilomethylidyne)]diphenolato}copper(II)sodium(I) N,N-dimethylformamide solvate
Xiao-Jian Ma
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536809051150
Abstract: In the heterometallic dinuclear title compound, [CuNa(C24H22N2O4)Cl(H2O)]·C3H7NO, the CuII ion is coordinated in a square-planar geometry by two N atoms and two O atoms of the 6,6′-diethoxy-2,2′-[1,2-phenylenebis(nitrilomethylidyne)]diphenolate ligand. The NaI ion is hexacoordinated by four O atoms of the ligand, defining the equatorial plan, and by one O atom of the water molecule and one Cl atom occuping axial positions. The CuII and NaI ions are bridged by two phenolate O atoms.
DETERMINATION OF NINE COMPONENTS IN BAYER LIQUORS BY HIGH PERFORMANCE ION CHROMATOGRAPHY WITH CONDUCTIVITY DETECTOR
JIAN BO XIAO
Journal of the Chilean Chemical Society , 2006,
Abstract: A High Performance Ion Chromatographic (HPIC) method for the determination of nine components in Bayer liquors was reported. Formic, acetic, propionic, oxalic, succinic, glutaric anion, F-, Cl-, and SO4(2-) were separated and determined by High Performance Ion Chromatography with conductivity detector. The analytes were removed from Bayer liquor by using an ion-exchange resin column. The chromatographic separation was achieved with only one IonPac AS11-HC column thermostated at 30 °C. The precision results showed that the repeatability and reproducibility were <2.94 and <1.37%, respectively. The accuracy of the method was assessed by the recoveries ranging from 86.3 to 105.6 %. Under optimum conditions the detection limits ranged from 0.008 to 0.053 mg/l
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