检索结果-南通市图书馆

Modeling of growth process and facet formation in Cz growth oxide crystals

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Modeling of growth process and facet formation in Cz growth ...

第十七届全国晶体生长与材料学术会议(CCCG-17)

作者： Vasif Mamedov Andrey Smirnov vladimir kalaev STR Group Inc.

Modeling of growth process and facet formation in Cz growth oxide crystals Vasif Mamedov,Andrey Smirnov,vladimir kalaev STR Group,*** Oxide crystals are used for various applications:laser,optical,*** of the commonly ...

关键词：

Modeling and optimization of large-scale sapphire crystal growth process using HEM and Ky methods

在线全文

cnki会议

学校读者我要写书评

暂无评论

Modeling and optimization of large-scale sapphire crystal gr...

第十七届全国晶体生长与材料学术会议(CCCG-17)

作者： Vasif Mamedov vladimir Artemyev Andrei Vorob’ev Andrey Smirnov vladimir kalaev STR Group Inc.

Sapphire crystals are used for production of high-brightness light-emitted diodes and devices,products in optics,medicine instruments and in other applications[1].Requirements for crystal quality and price motivate crystal manufacturers for optimization of crystal growth technology to increase furnace productivity and

关键词：

Modeling and optimization of 200mm and 300mm Cz Si growth processes

在线全文

cnki会议

学校读者我要写书评

暂无评论

Modeling and optimization of 200mm and 300mm Cz Si growth pr...

第十七届全国晶体生长与材料学术会议(CCCG-17)

作者： Andrei Vorob’ev Alexander Sidko Alexander Kuliev Andrey Smirnov vladimir kalaev STR Group Inc.

Around 25%of silicon wafers for photovoltaics and most of silicon wafers for microelectronics are manufactured using Cz growth *** all major applications,there are requirements to improve crystal quality and reduce pr...

关键词：

单晶炉导流筒、热屏及炭毡对单晶硅生长影响的优化模拟

在线全文

cnki会议

学校读者我要写书评

暂无评论

单晶炉导流筒、热屏及炭毡对单晶硅生长影响的优化模拟

第15届全国晶体生长与材料学术会议

作者：苏文佳左然 vladimir kalaev 江苏大学能源动力学院 STR Group St.PetersburgRussia

在Cz法生长太阳能级单晶硅中,单晶炉的导流筒、热屏和炭毡对晶体生长有很大影响。通过对上述三个部件进行改进优化,并通过数值模拟对优化前后晶体和熔体的热场、热屏外表面与石英坩埚内壁面之间的氩气流场以及晶体中的热应力进行分析,... 详细信息

在Cz法生长太阳能级单晶硅中,单晶炉的导流筒、热屏和炭毡对晶体生长有很大影响。通过对上述三个部件进行改进优化,并通过数值模拟对优化前后晶体和熔体的热场、热屏外表面与石英坩埚内壁面之间的氩气流场以及晶体中的热应力进行分析,得出以下结论:石墨导流筒的引入减少了炉体上部的氩气流动涡胞,进而减少了SiO在单晶炉上部的沉积;优化后的热屏减少了加热器对晶体的烘烤,使结晶速率加快;优化后的侧壁炭毡阻止了加热器向上部的热损失。优化后在加热器功耗不变时,结晶速率至少可提高35%,而不增加宏观位错的发生概率。

关键词：单晶硅 Cz炉数值模拟热屏炭毡

在线全文

cnki会议

学校读者我要写书评

暂无评论

直拉法单晶硅生长中的流动及其影响

直拉法单晶硅生长中的流动及其影响

第十届中国太阳能光伏会议

作者：左然 vladimir kalaev 张东亮汪钉崇江苏大学能源动力学院

总结了熔体中生长直拉硅单晶的基本控制要求,讨论了Cz法单晶生长中的各种流动及其对硅单晶生长的影响。借助于计算机模拟结果,显示了几种抑制热对流、优化单晶生长条件的方法。

关键词：晶体生长直拉硅热对流仿真

Equilibrium Arrivals to Preemptive Queueing System with Fixed and Random Population Size

在线全文

cnki会议

学校读者我要写书评

暂无评论

Journal of the Operations Research Society of China 2024年第1期12卷 77-92页

作者： Julia Chirkova vladimir Mazalov Institute of Applied Mathematical Research Karelian Research Centre of RASPetrozavodsk185910Russia School of Mathematics and Statistics Qingdao UniversityQingdao266071ShandongChina

A single-server queueing system with preemptive access is *** customer has one attempt to enter the system at its working interval[0,T].As soon as the customer request enters the system,the server immediately starts the *** when the next request arrives in the system,the previous one leaves the system even he has not finished his service *** study a non-cooperative game in which the customers wish to maximize their probability of obtaining service within a certain period of *** characterize the Nash equilibrium and the price of anarchy,which is defined as the ratio between the optimal and equilibrium social *** models are *** the first model the number of players is fixed,while in the second it is random and obeys the Poisson *** demonstrate that there exists a unique symmetric equilibrium for both ***,we calculate the price of anarchy for both models and show that the price of anarchy is not monotone with respect to the number of customers.

关键词： Service system Preemptive priorities Strategic users Random number of players Optimal arrivals Kolmogorov backward equations Nash equilibrium Price of anarchy

Study of asphaltene reaggregation in toluene/heptane mixture by dynamic and static light scattering

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Petroleum Research 2024年第1期9卷 48-54页

作者： vladimir N.Kuryakov Oil and Gas Research Institute of RAS(OGRI RAS) Gubkina Str.3119333MoscowRussian Federation

This paper presents the study of the effect of multiple ultrasonic impacts on submicron asphaltene aggregates in a toluene/heptane solution,conducted with dynamic light scattering *** objects of the study were four samples of asphaltenes obtained from four different *** all samples,the change in the average size of the asphaltene submicron aggregates with time was measured after the addition of a precipitant(heptane)to a solution of asphaltenes in toluene at an amount above the threshold *** aggregates formed in solution after the addition of the precipitant and were subjected to ultrasonic treatment,which led to the destruction of the asphaltene *** of destroyed asphaltenes was *** kinetics of this aggregation were similar to the kinetics of aggregation of asphaltenes after the addition of a *** iterations of asphaltene aggregate destruction in the sample led to a significant change in the kinetics of aggregation:the growth of aggregates slowed and stabilized at a size of approximately 200 nm and 30 nm for the different studied samples.

关键词： Asphaltenes Aggregation Sonication Dynamic light scattering Re-aggregation Colloidal stability Resins

On Differential Equations of Integrable Billiard Tables

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2024年第1期40卷 417-424页

作者： vladimir DRAGOVIC Andrey E.MIRONOV Department of Mathematical Sciences The University of Texas at DallasRichardson TXUSA Mathematical Institute SANU BelgradeSerbia Novosibirsk State University NovosibirskRussia Sobolev Institute of Mathematics of the Siberian Branch of the Russian Academy of Sciences NovosibirskRussia

We introduce a method to find differential equations for functions which define tables,such that associated billiard systems admit a local first *** illustrate this method in three situations:the case of(locally)integrable wire billiards,for finding surfaces in R^(3)with a first integral of degree one in velocities,and for finding a piece-wise smooth surface in R^(3)homeomorphic to a torus,being a table of a billiard admitting two additional first integrals.

关键词： Polynomial first integrals wire billiards piece-wise smooth surfaces

Attempts to restore loss of function in damaged ACD cells open the way to non-mutational oncogenesis

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Genes & Diseases 2024年第3期11卷 5-6页

作者： vladimir F.Niculescu 86420 Diedorf Germany Kirschenweg

This correspondence to Gene&Diseases calls attention to the controversy between proponents of genetic modification in carcinogenesis and supporters of non-mutational *** from molecular cancer research and findings from evolutionary cancer cell biology support the latter claim and provide no rationale for the mutational origin of sporadic *** is more conceivable that the general susceptibility of asymmetric cell division(ACD)phenotypes to oxygen leads to irreparable DNA defects and dysregulated defective symmetric cell division(DscD)phenotypes.

关键词： rational latter finding