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Search Results: 1 - 10 of 36099 matches for " Long Jin "
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Letter to the editor  [PDF]
Long Jin
Forensic Medicine and Anatomy Research (FMAR) , 2014, DOI: 10.4236/fmar.2014.21001
Abstract: Forensic Medicine and Anatomic Research
Resonance-free Region in scattering by a strictly convex obstacle
Long Jin
Mathematics , 2012, DOI: 10.1007/s11512-013-0185-0
Abstract: We prove the existence of a resonance free region in scattering by a strictly convex obstacle with the Robin boundary condition. More precisely, we show that the scattering resonances lie below a cubic curve which is the same as in the case of the Neumann boundary condition. This generalizes earlier results on cubic poles free regions obtained for the Dirichlet boundary condition.
Semiclassical Cauchy Estimates and Applications
Long Jin
Mathematics , 2013,
Abstract: In this note, we study solutions to semiclassical Schrodinger equations on a real analytic manifold with a real analytic potential and prove the semiclassical version of Cauchy estimates on derivatives. As an application, we use Donnelly and Fefferman's method to prove the upper and lower bounds for (n-1)-dimensional Hausdorff measure of the nodal sets of the solutions to semiclassical Schrodinger equations.
Scattering Resonances of Convex Obstacles for general boundary conditions
Long Jin
Mathematics , 2014, DOI: 10.1007/s00220-014-2250-3
Abstract: We study the distribution of resonances for smooth strictly convex obstacles under general boundary conditions. We show that under a pinched curvature condition for the boundary of the obstacle, the resonances are separated into cubic bands and the distribution in each bands satisfies Weyl's law.
Sudden Death in a Patient with Undiagnosed Diabetes, Acute Pancreatitis and Acute Adrenalitis  [PDF]
Cynthia Jin, Long Jin
Forensic Medicine and Anatomy Research (FMAR) , 2019, DOI: 10.4236/fmar.2019.74010
Abstract: It has been well documented that acute pancreatitis and diabetic ketoacidosis (DKA) co-occur, and both of them present either as a cause or result of the other [1] [2]. Recently, hypertriglyceridemia has been reported to co-occur as well [3] [4]; the involvement of acute adrenalitis in the setting of acute pancreatitis and DKA has not been reported. We report a case of sudden death due to diabetic ketoacidosis, acute pancreatitis and acute adrenalitis in a 37-year-old female. She was found unresponsive and breathless in bed by her mother at their residence. At the time of the autopsy, both lungs were expanded and sigmoid diverticulosis was discovered on gross examination. Histology of the pancreas and the adrenal glands revealed acute inflammation despite appearing normal upon gross examination. The postmortem toxicology report showed high levels of acetone (12 mg/dL) in the postmortem blood and extremely high levels of glucose (>500 mg/dL) in the postmortem vitreous fluid. This is the first reported case of fatal diabetic ketoacidosis co-occurring with acute pancreatitis and acute adrenalitis.
Global Attractivity of Positive Periodic Solutions of Delay Differential Equations with Feedback Control
Zhi-Long Jin
Discrete Dynamics in Nature and Society , 2007, DOI: 10.1155/2007/62731
Abstract: By constructing suitable Liapunov functionals and estimating uniform upper and lower bounds of solutions, sufficient conditions are obtained for the global attractivity of positive periodic solutions of the delay differential system with feedback control dy/dt=y(t)F(t,y(t−τ1(t)),…,y(t−τn(t)),u(t−δ(t))), du/dt=−η(t)u(t)
A Quasi-Elliptic Microstrip Bandpass Filter Using Modified Anti-Parallel Coupled-Line
Lingang Wang;Long Jin
PIER , 2013, DOI: 10.2528/PIER13012117
Abstract: A novel band-pass filter (BPF) with lower and upper stopband zeros is proposed. The filter mainly consists of two antisymmetric modified anti-parallel coupled-lines and double pairs of transmission lines. Compared with the traditional anti-parallel coupled-line, the new filter has a better performance at both pass band and stop band. On the basis of even-odd mode method and network theory, the filter has been analyzed in detail. In addition, a simple method to create transmission zeros is investigated, which is beneficial for controlling the stopband zeros. The proposed filter is implemented on RT/Duroid 4350 substrate. Measured results show low insertion loss of less than 1.6 dB in the pass band and good suppressing of more than 22 dB in the lower stop band. Measured results show a good agreement with simulated results.
N′-(3-Bromo-5-chloro-2-hydroxybenzylidene)-2-methoxybenzohydrazide
Jin-Long Hou
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809010198
Abstract: The title compound, C15H12BrClN2O3, was obtained by the condensation reaction between 3-bromo-5-chloro-2-hydroxybenzaldehyde and 2-methoxybenzohydrazide. The molecule is essentially planar, with a dihedral angle between the two benzene rings of 4.7 (2)°, and displays an E configuration about the C=N double bond. The molecular conformation is stabilized by intramolecular O—H...N and N—H...O hydrogen bonds. In the crystal structure, molecules are linked into zigzag chains running parallel to the c axis by intermolecular C—H...O hydrogen bonds. The chains are further connected through aromatic π–π stacking interactions with centroid–centroid distances of 3.583 (4) .
4-Hydroxy-N′-(3-nitrobenzylidene)benzohydrazide
Jin-Long Hou
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812014778
Abstract: The title compound, C14H11N3O4, was obtained by a condensation reaction between 3-nitrobenzaldehyde and 4-hydroxybenzohydrazide. The whole molecule is approximately planar, with a dihedral angle of 9.2 (3)° between the benzene rings. The molecule displays an E conformation about the C=N bond. In the crystal, molecules are linked via N—H...O, O—H...O and O—H...N hydrogen bonds, generating sheets parallel to the bc plane.
Determination of Fluvastatin Sodium by Differential Pulse Voltammetry
Jin-Long Yan
Pakistan Journal of Biological Sciences , 2006,
Abstract: To establish method for the determination of fluvastatin sodium in Loscol capsule, the electrochemical behavior of fluvastatin sodium on a glassy carbon electrode was investigated by cyclic voltammetry, linear sweep voltammetry and differential pulse voltammetry. It was found that fluvastatin sodium would give a sensitive oxidation peak at +0. 64 V in the HAc-NaAc buffer solution (pH 5.10) under the Differential Pulse Voltammetric (DPV) mode. The peak current was linear with the concentration of fluvastatin sodium in the range of 2.0~40 mg L-1. Based on which, a DPV method for determination of fluvastatin sodium with the detection limit of 0.24 mg L-1 has been developed. The proposed method has been used for determination of fluvastatin sodium in the Loscol capsule, the recovery was found to be in the range of 98.0~101.2%. The mechanism for this electrochemical reaction at the glassy carbon electrode was also discussed in this study. The electrochemical analysis method described here enables simple and rapid determination of fluvastatin sodium in real samples.
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