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融合相似预报方法在陇东南短期强降水预报中的应用

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高原气象 2025年第1期44卷 214-223页

作者：黄晓远李旭杜梦莹叶培龙李艳兰州大学大气科学学院甘肃兰州730000 兰州中心气象台甘肃兰州730020

基于逐步过滤相似法和自组织映射(SOM)神经网络方法,提出了一种融合相似预报方法。利用ECMWF模式预报产品、ERA5再分析资料和地面气象台站观测数据,使用该方法对2021-2022年陇东南地区开展了时效为72 h的强降水预报试验,并对预报效果进... 详细信息

基于逐步过滤相似法和自组织映射(SOM)神经网络方法,提出了一种融合相似预报方法。利用ECMWF模式预报产品、ERA5再分析资料和地面气象台站观测数据,使用该方法对2021-2022年陇东南地区开展了时效为72 h的强降水预报试验,并对预报效果进行了检验。结果表明:(1)融合相似预报方法的TS评分处于4.5%~9.1%之间,与ECMWF模式预报结果相比表现出一定的优势。随着预报时效的增长,强降水预报的TS评分呈现减小的趋势,其在08:00(北京时,下同)起报的TS评分相对较高。(2)相比于单独使用逐步过滤相似预报,融合相似预报方法的准确性有所提升,并能在一定程度上降低空报率。其中08:00起报和20:00起报的TS评分提高了1.31%和0.63%,而FAR同时下降了2.39%和1.25%。

关键词：强降水短期预报相似预报逐步过滤相似自组织映射(SOM)

GLOBAL STABILITY ANALYSIS IN CELLULAR NEURAL NETWORKS WITH UNBOUNDED TIME DELAYS

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Applied Mathematics and Mechanics(English Edition) 2004年第6期25卷 686-693页

作者： ZHANGJi-ye NationalTractionPowerLaboratory SouthwestJiaotongUniversityChengdu610031P.R.China

Without assuming the boundedness and differentiability of the activation functions,the conditions ensuring existence,uniqueness,and global asymptotical stability of the equilibrium point of cellular neural networks with unbounded time delays and variable delays were *** the idea of vector Liapunov method,the intero-differential inequalities with unbounded delay and variable delays were *** the stability analysis of the intero-differential inequalities,the sufficient conditions for global asymptotic stability of cellular neural networks were obtained.

关键词： neural network time delay cellular neural network stability

Information leakage resistant quantum dialogue against collective noise

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Science China(Physics,Mechanics & Astronomy) 2014年第12期57卷 2266-2275页

作者： ye TianYu College of Information & Electronic Engineering Zhejiang Gongshang University

In this paper,two information leakage resistant quantum dialogue(QD)protocols over a collective-noise channel are ***-free subspace(DFS)is used to erase the influence from two kinds of collective noise,i.e.,collective-dephasing noise and collective-rotation noise,where each logical qubit is composed of two physical qubits and free from *** each of the two proposed protocols,the secret messages are encoded on the initial logical qubits via two composite unitary ***,the single-photon measurements rather than the Bell-state measurements or the more complicated measurements are needed for decoding,making the two proposed protocols easier to *** initial state of each logical qubit is privately shared between the two authenticated users through the direct transmission of its auxiliary ***,the information leakage problem is avoided in the two proposed ***,the detailed security analysis also shows that Eve’s several famous active attacks can be effectively overcome,such as the Trojan horse attack,the intercept-resend attack,the measure-resend attack,the entangle-measure attack and the correlation-elicitation(CE)attack.

关键词： quantum dialogue(QD) bidirectional quantum secure direct communication (BQSDC) information leakage collec-tive-dephasing noise collective-rotation noise

LIMIT CYCLES AND BIFURCATION CURVES FOR THE QUADRATIC DIFFERENTIAL SYSTEM(III)_(m=0)HAVING THREE ANTI-SADDLES(II)

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Chinese Annals of Mathematics,Series B 1997年第3期18卷 315-322页

作者： ye YANQIAN Department of Mathematics:Nanjing University Nanjing 210008China

As a continuation of,the author studies the limit cycle bifurcation around the focus S_(1)other than O(0,0)for the system(1)asδvaries.A conjecture on the mon-existence of limit cycles around S_(1),and another one on ... 详细信息

关键词： Quadratic differential system Limit cycle Bifurcation Anti-saddle Focus

ON THE NON-EXISTENCE OF LIMIT CYCLES OF CERTAIN QUADRATIC SYSTEMS

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Chinese Annals of Mathematics,Series B 1998年第3期19卷 359-368页

作者： ye WEIYIN Nanjing Normal Univ Dept Math Nanjing 210024 Peoples R China

In §1 and §3, two conjectures mentioned by ye Yanqian are studied. In §2, by use of elementary methods the author proves some non-existence theorems of limit cycles (LC, for abbreviation) for quadratic different... 详细信息

关键词： Quadratic differential system Limit cycle

Mechanisms of insulin resistance in obesity

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Frontiers of Medicine 2013年第1期7卷 14-24页

作者： Jianping ye Antioxidant and Gene Regulation Laboratory Pennington Biomedical Research CenterLouisiana State University SystemBaton RougeLA70808USA

Obesity increases the risk for type 2 diabetes through induction of insulin *** of type 2 diabetes has been limited by little translational knowledge of insulin resistance although there have been several well-documented hypotheses for insulin *** those hypotheses,inflammation,mitochondrial dysfunction,hyperinsulinemia and lipotoxicity have been the major concepts and have received a lot of *** stress,endoplasmic reticulum(ER)stress,genetic background,aging,fatty liver,hypoxia and lipodystrophy are active subjects in the study of these ***,none of those concepts or views has led to an effective therapy for type 2 *** reason is that there has been no consensus for a unifying mechanism of insulin *** this review article,literature is critically analyzed and reinterpreted for a new energy-based concept of insulin resistance,in which insulin resistance is a result of energy surplus in *** energy surplus signal is mediated by ATP and sensed by adenosine monophosphate-activated protein kinase(AMPK)signaling *** ATP level by suppression of production or stimulation of utilization is a promising approach in the treatment of insulin *** support,many of existing insulin sensitizing medicines inhibit ATP production in *** effective therapies such as weight loss,exercise,and caloric restriction all reduce ATP in insulin sensitive *** new concept provides a unifying cellular and molecular mechanism of insulin resistance in obesity,which may apply to insulin resistance in aging and lipodystrophy.

关键词： type 2 diabetes energy expenditure inflammation lipotoxicity mitochondria hyperinsulinemia adenosine monophosphate-activated protein kinase(AMPK)

Enhancement of hydrogenation kinetics and thermodynamic properties of ZrCo1-xCrx(x=0-0.1)alloys for hydrogen storage

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Chinese Physics B 2020年第8期29卷 543-552页

作者： Linling Luo Xiaoqiu ye Guanghui Zhang Huaqin Kou Renjin Xiong Ge sang Ronghai Yu Dongliang Zhao Science and Technology on Surface Physics and Chemistry Laboratory Mianyang 621907China Institute of Materials China Academy of Engineering PhysicsMianyang 621900China School of Materials Science and Engineering Beihang UniversityBeijing 100191China Department of Functional Material Research Central Iron and Steel Research InstituteBeijing 100081China

The vacuum arc melting method was used to prepare ZrCo1-xCrx(x=0,0.025,0.05,0.075,0.1)***,the crystal structure,hydrogenation kinetics,thermodynamic properties,and disproportionation performance of ZrCo1-xCrx(x=0-0.1)alloys were *** x-ray diffraction spectra demonstrated that ZrCo1-xCrx(x=0-0.1)alloys contained ZrCo and ZrCo2 phases,and their corresponding hydrides consisted of ZrCoH3 and ZrH *** activation behaviors of Cr-substituted samples were significantly *** activation time of ZrCo was 7715 s while that of ZrCo0.9Cr0.1 was 195 *** improvement of kinetics can be attributed to the catalytic hydrogenation of *** activation energy for the hydrogenation of ZrCo was 44.88-kJ·mol^-1 H2 and decreased to 40.34-kJ·mol^-1 H2 for *** plateau pressure and width of the pressure-composition-temperature curves decreased slightly as Cr content *** extent of disproportionation of ZrCo was 83.68%after being insulated at 798 K for 10 h and decreased slightly to 70.52%for *** improvement of anti-disproportionation performance can be attributed to increase in the activation energy of disproportionation from 167.46-kJ·mol^-1 H2 for ZrCo to 168.28-kJ·mol^-1 H2 for ZrCo0.95Cr0.05.

关键词： hydrogen storage ZrCo Cr substitution anti-disproportionation performance activation behaviors

The response of Golgi protein 73 to transcatheter arterial chemoembolization in patients with hepatocellular carcinoma may relate to the influence of certain chemotherapeutics

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Hepatobiliary & Pancreatic Diseases International 2015年第4期14卷 406-412页

作者： Jie Pan ye-Fan Zhang Hua-Yu Yang Hai-Feng Xu Xin Lu Xin-Ting sang Shou-Xian Zhong Yi-Lei Mao Department of Radiology Peking Union Medical College Hospital Chinese Academy of Medical Sciences and Peking Union Medical College Department of Liver Surgery Peking Union Medical College Hospital Chinese Academy of Medical Sciences and Peking Union Medical College Department of Abdominal Surgery Cancer Hospital Chinese Academy of Medical Sciences and Peking Union Medical College

BACKGROUND： Golgi protein 73 （GP73） is a promising bio- marker of hepatocellular carcinoma （HCC）. It decreases after surgical resection, and resumes upon recurrence, indicating a potential indicator for the effectiveness of the treatment. But changes of GP73 after transcatheter arterial chemoemboliza- tion （TACE） have not been reported so far. This study was to investigate the dynamic changes of GP73 in HCC patients af- ter TACE treatment, and the possible underlying mechanisms in the cell cultures. METHODS： Blood samples were collected from 72 HCC pa- tients, before TACE, at day I and day 30 after TACE. GP73 lev- els were measured by Western blotting. The dynamic changes of GP73 were analyzed and compared with image changes and clinical data. The effects of chemotherapeutic agents （5-FU and pirarubicin） on GP73 expression were tested in three HCC cell lines （HepG2, HCCLM3 and MHCC97H）. RESULTS： The GP73 level was significantly elevated at day 1 and day 30 after TACE in HCC patients compared with that before the procedure （P〈0.05）. There was no statistical differ- ence between the two time points after TACE, nor correlationbetween GP73 levels and dinicopathological features, tumor metastasis, and patient survival. Pirarubicin, not 5-FU, signifi- cantly increased GP73 expression in three cell lines. CONCLUSIONS： Unlike surgical resection which decreases the GP73 level, TACE significantly increased GP73 expression in patients with HCC. No correlations were observed among GP73 levels, tumor characteristics and prognosis of patients with HCC.

关键词： hepatocellular carcinoma transcatheter arterial chemoembolization Golgi protein 73 chemotherapeutics

Time Decay Rate of Solutions Toward the Viscous Shock Waves under Periodic Perturbations for the Scalar Conservation Law with Nonlinear Viscosity

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Acta Mathematicae Applicatae Sinica 2023年第1期39卷 28-48页

作者： ye-chi LIU Academy of Mathmatics and Systems Science Chinese Academy of SciencesBeijing 100190China

In this paper,it is proved that the weak solution to the Cauchy problem for the scalar viscous conservation law,with nonlinear viscosity,different far field states and periodic perturbations,not only exists globally in time,but also converges towards the viscous shock wave of the corresponding Riemann problem as time goes to ***,the decay rate is *** proof is given by a technical energy method.

关键词： viscous conservation law asymptotic behavior time decay rate viscous shock wave periodic perturbation