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On Solvability of an Inverse Boundary Value Problem for a Fourth Order Elliptic Equation

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Journal of Mathematics and System Science 2013年第11期3卷 560-566页

作者： ya. T.Mehraliyev Department of differential and inteqral equations Baku State University Khalilov 23 Baku AZ1148 Azerbaijan

In the paper an inverse boundary value problem for a fourth order elliptic equation with an integral condition of the first kind is investigated. First, the given problem is reduced to an equivalent problem in a certain sense. Then, using the Fourier method the equivalent problem is reduced to solving the system of integral equations. The existence and uniqueness of a solution to the system of integral equation is proved by the contraction mapping principle. This solution is also the unique solution to the equivalent problem. Finally, by equivalence, the theorem of existence and uniqueness of a classical solution to the given problem is proved.

关键词： Inverse boundary value problem elliptic equation Fourier method classical solution.

A New Method of Measurement of the True Temperature and Emissivity of Non-Black Body Using One Component of Wien’s Spectrum of Thermal Radiation

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Journal of Applied Mathematics and Physics 2015年第5期3卷 524-529页

作者： D. ya. Svet Joint Institute for High Temperatures of the Russian Academy of Sciences Moscow Russian Federation

It is shown that the measurement of only one component of the Wein’s spectrum of thermal radiation in range λT ≤ 3000 (°C μm) is sufficient to estimate the true temperature and spectral emissivity of the selected component with sufficient accuracy, although more than one hundred years this statement was considered as incorrect. The proposed method is based on the formation of the linear dependence of the logarithm of the emissivity of not real wavelengths and artificially generated “virtual” spectral components.

关键词： True Temperature Spectral Emissivity Wein’s Law

酸性饲粮对东方蜜蜂微孢子虫繁殖与蜜蜂免疫力的影响

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福建农林大学学报（自然科学版） 2025年第1期54卷 117-124页

作者：魏秀秀陈雅黄强江西农业大学蜜蜂研究所江西农业大学动物科学技术学院江西南昌330045

【目的】研究酸性饲粮对东方蜜蜂微孢子虫繁殖和意大利蜜蜂免疫力的影响,验证酸性饲粮是否能够防治蜜蜂微孢子虫疾病,为在养蜂中合理使用酸性饲料提供科学依据。【方法】以意大利蜜蜂为研究对象,选取400只新出房蜜蜂,随机分为4组,分别... 详细信息

【目的】研究酸性饲粮对东方蜜蜂微孢子虫繁殖和意大利蜜蜂免疫力的影响,验证酸性饲粮是否能够防治蜜蜂微孢子虫疾病,为在养蜂中合理使用酸性饲料提供科学依据。【方法】以意大利蜜蜂为研究对象,选取400只新出房蜜蜂,随机分为4组,分别为对照组、微孢子虫组、微孢子虫+柠檬酸组(含50 g·L^(-1)柠檬酸)和微孢子虫+醋酸组(含400 mL·L^(-1)醋酸),每组100只,检测并分析感染后第1天和第3天免疫基因的相对表达量,统计分析感染7 d后蜜蜂体内微孢子虫数量和蜜蜂存活率。【结果】4个试验组之间的存活率差异极显著(P0.05)。在微孢子虫组中,蜜蜂感染3 d内检测到11个免疫基因的相对表达量未显著下降(P>0.05),但酸性饲粮处理组中的部分免疫基因PgRPSC4300和Abaecin的表达量显著下降(Pg·L^(-1)柠檬酸和400 mL·L^(-1)醋酸的饲粮无法抑制微孢子虫繁殖,也不能提高蜜蜂免疫力和存活率,不适用于治疗蜜蜂微孢子虫病。

关键词：东方蜜蜂微孢子虫意大利蜜蜂酸性饲粮免疫基因存活率

Cylinder Pressure Prediction of An HCCI Engine Using Deep Learning

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Chinese Journal of Mechanical Engineering 2021年第2期34卷 160-167页

作者： Halit ya.ar gültekinÇağıl Orhan Torkul MerveŞişci Department of Mechanical Engineering Engineering FacultySakarya UniversityEsentepe Campus54187 SerdivanSakaryaTurkey Department of Industrial Engineering Engineering FacultySakarya UniversityEsentepe Campus54187 SerdivanSakaryaTurkey

Engine tests are both costly and time consuming in developing a new internal combustion ***,it is of great importance to predict engine characteristics with high accuracy using artificial ***,it is possible to reduce engine testing costs and speed up the engine development *** Learning is an effective artificial intelligence method that shows high performance in many research areas through its ability to learn high-level hidden features in data *** present paper describes a method to predict the cylinder pressure of a Homogeneous Charge Compression Ignition(HCCI)engine for various excess air coefficients by using Deep Neural Network,which is one of the Deep Learning methods and is based on the Artificial Neural Network(ANN).The Deep Learning results were compared with the ANN and experimental *** results show that the difference between experimental and the Deep Neural Network(DNN)results were less than 1%.The best results were obtained by Deep Learning *** cylinder pressure was predicted with a maximum accuracy of 97.83%of the experimental value by using *** the other hand,the accuracy value was increased up to 99.84%using *** results show that the DNN method can be used effectively to predict cylinder pressures of internal combustion engines.

关键词： Artificial neural network Deep neural network HCCI engine Cylinder pressure Excess air coefficient

Changes of Reef Community near Ku Lao Cham Islands (South China Sea) after Sangshen Typhoon

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American Journal of Climate Change 2012年第1期1卷 41-47页

作者： Yuri ya. Latypov Nikolai Selin A. V. Zhirmunsky Institute of Marine Biology Far East Branch of Russian Academy of Sciences (FEB RAS) Vladivostok Russia Far Eastern State Natural Marine Biosphere Reserve Vladivostok Russia

Coral reefs of Ku Lao Cham Islands in the Central Vietnam were studied over a quarter of a century. It was established that the reefs of these Islands were lost after the Sangshen typhoon and a heavy flood, which happened in 2006. As a result of these natural phenomena a significant part of coral populations was physically destroyed, and a powerful export of clay substances from the nearest Vietnamese coast and from the Bung River, flowing into the sea opposite the Islands, causing abundant sedimentation and death of almost all the remaining scleractinian corals. At present, where formerly there were coral reefs, now there is algal-alcyonarian stage of succession of reef communities. This is typical, as a rule, for restoration of reefs after a destructive typhoon effect.

关键词： Sangshen Typhoon Reef Community Change Succession

Accretivity of the general Second Order Linear Differential Operator

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Acta Mathematica Sinica,English Series 2019年第6期35卷 832-852页

作者： V.g.MAZ'ya.I.E.VERBITSKY Department of Mathematics Linkoping University SE-581 83 Linkoping Sweden RUDN University 6 Miklukho-Maklay St. Moscow 117198 Russia Department of Mathematics University of Missouri Columbia Missouri 65211 USA

For the general second order linear differential operator ■ with complex-valued distributional coefficients a_(jk), b_j, and c in an open set Ω ? R^n(n ≥ 1), we present conditions which ensure that-L^0 is accretive... 详细信息

关键词： Accretive differential operators complex-valued coefficients Schr?dinger operator form boundedness

四波混频Autler-Townes分裂中的探测光影响

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原子与分子物理学报 2025年第3期42卷 110-115页

作者：裴丽娅侯海龙北京化工大学数理学院北京100029

在双Λ-型四波混频系统中,研究了探测光强度对Autler-Townes(AT)分裂效应的影响.随着弱探测光强度增大,由缀饰态共振产生的AT分裂双峰间隔不变,但却逐渐增宽线宽且减弱直至消失;而在强耦合光失谐条件下,不对称地位于单光子共振峰两侧的A... 详细信息

在双Λ-型四波混频系统中,研究了探测光强度对Autler-Townes(AT)分裂效应的影响.随着弱探测光强度增大,由缀饰态共振产生的AT分裂双峰间隔不变,但却逐渐增宽线宽且减弱直至消失;而在强耦合光失谐条件下,不对称地位于单光子共振峰两侧的AT分裂双峰却会逐渐趋于对称分布.详细讨论了探测光场对原子的缀饰影响,提出通过探测光强度可以调控原子两基态之间的有效Raman相干,从而影响AT分裂双峰的特征.

关键词：四波混频原子相干 Autler-Townes分裂缀饰态横向弛豫率

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BIOLOgICAL INVASION PROBLEM WITH FREE BOUNDARY NONLOCAL DIFFUSION EQUATION

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数学杂志 2025年第1期45卷 48-56页

作者： HE Yu-rong ZHANg ya.rong School of Science Xi'an University of Architecture and TechnologyXi'an 710055China Xi'an Special Equipment Inspection Institute Xi'an 710065China School of Power and Energy Northwestern Polytechnical UniversityXi'an 710072China

In order to better describe the phenomenon of biological invasion,this paper introduces a free boundary model of biological ***,the right free boundary is added to the equation with logistic ***,the existence and uniqueness of local solutions are proved by the Sobolev embedding theorem and the comparison ***,according to the relevant research data and contents of red fire ants,the diffusion area and nest number of red fire ants were simulated without external *** paper mainly simulates the early diffusion process of red fire *** the early diffusion stage,red fire ants grow slowly and then spread over a large area after reaching a certain number.

关键词： Free boundary biological invasion differential equation

主体结构荷载可控的新型组合式防护结构(Ⅱ):影响因素及设计理念

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爆炸与冲击 2025年第1期45卷 16-27页

作者：方秦高矗孔祥振杨亚陆军工程大学爆炸冲击防灾减灾国家重点实验室江苏南京210007 内蒙古财经大学财政税务学院内蒙古呼和浩特010070

为明确泡沫混凝土厚度和强度对组合式防护结构抗爆性能的影响,充分发挥和合理利用泡沫混凝土良好的消波特性,首先通过试验及数值模拟探讨不同泡沫混凝土厚度和强度对组合式防护结构抗爆性能的影响,并分析分层梯度泡沫混凝土在爆炸波作... 详细信息

为明确泡沫混凝土厚度和强度对组合式防护结构抗爆性能的影响,充分发挥和合理利用泡沫混凝土良好的消波特性,首先通过试验及数值模拟探讨不同泡沫混凝土厚度和强度对组合式防护结构抗爆性能的影响,并分析分层梯度泡沫混凝土在爆炸波作用下的消波特性。然后将组合式防护结构与采用中粗砂为分配层的传统成层式结构进行对比分析验证其优越性,在此基础上,总结凝练出组合式防护结构的主体结构荷载可控的设计理念。结果表明,利用泡沫混凝土材料较长的屈服平台和较低的波阻抗,以泡沫混凝土作为能量调控层,通过设计泡沫混凝土强度等级(密度等级)和厚度以及采用多层梯度泡沫混凝土,可使得作用于主体结构上的爆炸荷载峰值恰为泡沫混凝土屈服强度,实现对主体结构上荷载的可控设计,有效解决了中粗砂为分配层的传统成层式结构不易控制作用于主体结构上荷载的问题。研究结果可为抗新型钻地弹的防护设计提供重要参考。

关键词：泡沫混凝土组合式防护结构可控设计爆炸波消波