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Parallel interference cancellation for carrier frequency offset in OFDM assisted with recursive least squares algorithm

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The Journal of China Universities of Posts and Telecommunications 2010年第3期17卷 13-19页

作者： GUAN qing-yang zhao Hong-lin guo qing Communication Research Center Harbin Institute of Technology Harbin 150001 China

Parallel interference cancellation （PIC） interference due to the carrier frequency assisted with recursive least squares offset （CFO） in orthogonal frequency （RLS） algorithm is proposed to cancel the division multiplexing （OFDM） system. The proposed algorithm is composed of two stages, which are RLS scheme and PIC scheme. RLS scheme is selected to compensate the frequency offset in the time domain in the first stage, and the interference induced by residual frequency offset is canceled by the PIC scheme in the frequency domain in the second stage. The result of bit error rate （BER） shows that its performance is robust for cancellation as comparison criteria, even though the frequency offset is 0.45. The 16QAM constellation is also simulated to observe the improvements from the proposed suppression schemes.

关键词： OFDM CFO RLS PIC

Blind cancellation for frequency offset in OFDM system based on MCMA-RLS algorithm

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High Technology Letters 2011年第4期17卷 366-370页

作者： Guan qingyang zhao Honglin guo qing Communication Research Center Harbin Institute of Technology Harbin 150001 P. R. China

Modified constant modulus and recursive least squares （MCMA-RLS） algorithm is proposed to cancel interference caused by the variable frequency offset （FO） in the orthogonal frequency division multiplexing （OFDM） system. The MCMA-RLS algorithm is composed of two stages including MCMA scheme and RLS scheme. MCMA is selected to pre-cancel the variable frequency offset firstly, and then the residual interference has been canceled by the RLS scheme. BR error rate is simulated to demonstrate that the proposed method is robust for canceling the variable frequency offset.

关键词： orthogonal frequency division multiplexing (OFDM) fxequency offset (FO) modified constantmodulus algorithm (MCMA) reeursive least squares (RLS)

Effect of β Radiation on Bcl-2 and Bax Expressions in Benign Prostate Hyperplasia Tissues

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Chemical Research in Chinese Universities 2008年第4期24卷 501-504页

作者： MA qing-jie GAO Shi zhao Jie GU Xin-quan CAI Shan-yu zhao guo-qing Department of Nuclear Medicine China-Japan Union Hospital Jilin University Changchun 130033 P. R. China Isotope Division China Institute of Atomic Energy Beijing 102413 P. R. China

The authors chose specimens from nine normal prostate tissues（NP group）, 15 benign prostate hyperplasia（BPH） prostates（BPH group）, and 35 BPH prostates that had been treated＇with ^90Sr/^90Y Prostatic Hyperplasia Applicator（exposure group）. The expressions of bcl-2 and bax in stroma and epithelia of prostate tissues were demonstrated by means of immunohistochemical staining, and the staining positive rate was semiquantatively determined, so as to observe the expression of bcl-2 and bax genes in the prostate tissues of normal individuals and BPH patients, before and after fl radiation, and to evaluate the influence of fl radiation on bcl-2 and bax expressions. The expressions of gene bcl-2 in the prostate epithelia of NP and BPH are significantly higher than those in the prostate stroma（P〈0.01）. However, the expressions of bcl-2 in the prostate epithelia and stroma of the BPH group are obviously higher than those in the NP group（P〈0.01）. The expression of gene bax in the prostate epithelia of the NP group is higher than that in the BPH group（P〈0.05）. However, bcl-2 expressions in the prostate epithelia and stroma of the BPH group are significantly higher than the bax expressions（P〈0.01）. Compared with those of the NP group, the expressions of bcl-2 in the prostate epithelia and stroma of the exposure group decrease remarkably, even as the expressions of the bax notably increase（P〈0.01）. Thus, the administration of β radiation can remarkably affect bcl-2 and bax gene expressions, to regulate cell apoptosis, in the prostate tissues of BPH.

关键词： Benign prostate hyperplasia β Radiation Apoptosis

Backward Secondary Electron Emission Yield of Thick Targets Induced by MeV Ions

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Chinese Physics Letters 2000年第9期17卷 691-693页

作者： JIANG Lei zhao guo-qing ZHOU Zhu-Ying Applied Ion Beam Physics Laboratory Institute of Modern PhysicsFudan UniversityShanghai 200433

The backward secondary electron emission yields of MeV ions(H^(+),He^(+),He^(++),Cl,Si,and Cu)impinging on thick carbon and gold targets are *** measured results for H+(1MeV≤E≤5MeV)on carbon are proportional to the electronic stopping *** experimental data and fitting formula of yields for H+(1 MeV≤E≤4.5MeV)impacting Au are compared with the theoretical *** influence of the collective field and the charge state of ions on the secondary electron emission yield is discussed.

关键词： collective backward Electron

Comparative Proteomic Analysis of Human Benign Prostatic Hyperplastic Tissue Before and After Irradiation with Radioactive Nuclide

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Chemical Research in Chinese Universities 2010年第1期26卷 81-85页

作者： CHEN Li-bo zhao Jie zhao guo-qing XU Yan-li LI Jun GAO Shi MA qing-jie China-Japan Union Hospital of Jilin University Changehun 130033 P. R. China Medical College of Hebei Engineering University Handan 056029 P. R. China

The expressed proteins were extracted from human benign prostatic hyperplastic tissues obtained with transurethral resection of the prostate before and after their irradiation with radioactive nuclide. The proteins were separated by two-dimensional gel electrophoresis and analyzed by mass spectrometry. Four proteins were differentially expressed and were identified with a database search. Three were associated with the regulation of cell motion and one was lactate dehydrogenase B, which plays an important role in the process of cell energy metabolism and cell state changes in tissue. The comparative proteomic analysis indicates that after irradiation with radioactive nuclide, changes occur in human benign prostatic hyperplastic cells, and associated proteins are expressed. Analysis of these proteins should help to identify the mechanism involved when human prostatic hyperplasia is treated by irradiation with radioactive nuclide.

关键词： Prostatic hyperplasia Radioactivity Nuclide Proteome

Measured Stopping Powers of ^(7)Li Ions in Silicon Single Crystal at 1-5 MeV

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Chinese Physics Letters 1996年第3期13卷 172-174页

作者： LI Zhong zhao guo-qing ZHOU Zhu-ying TANG Jia-yong YANG Fu-jia Department of Nuclear Science Fudan UniversityShanghai 2004331 Division 2 P.O.Box 800-211Shanghai 201800

Stopping powers of ^(7)Li ions in silicon single crystal at 1-5 MeV in random andchanneling directions were determined in iransmission geometry,with the uncertainties less than 6%.The measured results were compared wi... 详细信息

关键词： Stopping directions crystal

Syntheses, Crystal Structures and Catalytic Activities of Two Novel Mn_2Dy_2O_2 Complexes

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Chinese Journal of Structural Chemistry 2019年第1期38卷 109-116,4页

作者： zhao guo-qing LI Yan-Xi CHEN Chang-Hui ZHANG Chun-Xi Laboratory of Photochemistry Institute of ChemistryChinese Academy of Sciences University of Chinese Academy of Sciences

Two novel heteronuclear manganese-dysprosium complexes have been synthesized and characterized, both of which contain a [Mn_2Dy_2O_2] core ligated by eight But CO_2-anions and four neutral ligands. In complex 1, [Mn_2Dy_2O_2(Bu^tCO_2)_8(Bu^tCO_2H)_4], all the four neutral ligands coordinated to Dy^(3+) are pivalic acids; Instead, two of these four pivalic acids have been replaced by ethanol in complex 2 [Mn2 Dy2 O2(Bu^tCO_2)_8(Bu^tCO_2H)_2(CH_3CH_2OH)_2]. The crystal of complex 1(C_(60)H_(112)Dy_2Mn_2O_(26), Mr = 1684.36) belongs to the orthorhombic system, space group Pbca with a =19.853(3), b = 18.565(3), c = 20.952(3) ?, V = 7723(2) ?3, Z = 4, Dc = 1.449 g/cm^3, S = 1.210, μ =2.302 mm^(-1), F(000) = 3448, the final R = 0.0802 and w R = 0.1570 for 8736 independent *** crystal of complex 2(C_(54)H_(104)Dy_2Mn_2O_(24), Mr = 1572.25) belongs to the monoclinic system,space group C2/c with a = 27.814(6), b = 13.194(3), c = 22.912(5) ?, β = 124.89(3)o, V = 6897(3) ?3,Z = 4, Dc = 1.514 g/cm^3, S = 1.086, μ = 2.570 mm^(-1), F(000) = 3208, the final R = 0.0256 and wR =0.0592 for 7763 independent reflections. The cyclic voltammogram and catalytic activity measurements of complex 1 suggest that this type of complex can serve as a catalyst for oxygen-evolving reaction.

关键词： manganese-dysprosium cluster crystal structure catalytic activity

Dexmedetomidine Attenuates High Glucose-induced HK-2 Epithelial-mesenchymal Transition by Inhibiting AKT and ERK

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Biomedical and Environmental Sciences 2020年第5期33卷 323-330页

作者： PAN Qi Zheng LI Kai YANG Zhuo Dong GAO Ming SHI Jia Hong REN Shu Ping zhao guo qing Department of Anesthesiology China-Japan Union HospitalJilin UniversityChangchun 130033JilinChina Department of Occupational and Environmental Health School of Public HealthJilin UniversityChangchun 130021JilinChina Department of Ultrasound China-Japan Union HospitalJilin UniversityChangchun 130033JilinChina

Objective To explore the protective effects of dexmedetomidine(Dex)against high glucose-induced epithelial-mesenchymal transition in HK-2 cells and relevant *** HK-2 cells were exposed to either glucose or glucose+Dex for 6 *** production of ROS,morphology of HK-2 cells,and cell cycle were ***,the expression of AKT,p-AKT,ERK,pERK,PI3 K,E-Cadherin,Claudin-1,andα-SMA were determined and compared between HK-2 cells exposed to glucose and those exposed to both glucose and Dex with or without PI3 K/AKT pathway inhibitor LY294002 and ERK pathway inhibitor *** Compared with HK-2 cells exposed to high level of glucose,the HK-2 cells exposed to both high level of glucose and Dex showed:(1)lower level of ROS production;(2)cell morphology was complete;(3)more cells in G1 phase;(4)lower expression of p-AKT,p-ERK andα-SMA,higher expression of ECadherin and ***3 K/AKT inhibitor LY294002 and ERK inhibitor U0126 decreased the expression of p-AKT,p-ERK andα-SMA,and increased the expression of E-Cadherin and *** Dex can attenuate high glucose-induced HK-2 epithelial-mesenchymal transition by inhibiting AKT and ERK.

关键词： Dexmedetomidine Epithelial-mesenchymal transition High glucose Oxidative stress HK-2 cells

The Effect of Beta-2 Adrenergic Receptor Genetic Variants on Vasopressor Requirements in Surgery Patients: A Meta-analysis

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Biomedical and Environmental Sciences 2019年第3期32卷 226-230页

作者： PAN Qi Zheng SHI Jia Hong LI Yun GAO Ming REN Shu Ping zhao guo qing Department of Anesthesiology China-Japan Union HospitalJilin University Department of Toxicology School of Public HealthJilin University Department of Ophthalmology China-Japan Union HospitalJilin University Department of Occupational and Environmental Health School of Public HealthJilin University

Spinal anesthesia is a common technique which can significantly alleviate surgery patients' anguish, and can avoid the risks associated with general anesthesia. However, spinal anesthesia is associated with some other risks. The most common adverse event is hypotension resulting from a near complete sympathetic block. Nearly 1/3 of non-obstetric patients experience spinal anesthesia-induced hypotension. Moreover, in obstetric patients without pharmacological prophylaxis, the incidence rate of spinal anesthesia-induced hypotension can reach up to 70%-80%[1].

关键词： Effect Genetic Variants Meta-analysis