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2012 7th International Forum on Strategic Technology (IFOST)最新文献

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Compaction pressure influence on the sintering of bioceramic materials 压实压力对生物陶瓷材料烧结的影响
Pub Date : 2012-11-26 DOI: 10.1109/IFOST.2012.6357556
M. Ivin, V. Vereschagin, V. Ignatov
The use of ceramic materials varies and is determined by their properties and area of application. Orthopedics and traumatology have demand for porous materials for reconstruction of osseous defects. The material most closely fitting the natural bone in its structure and biological properties is hydroxyapatite HA (Ca5(PO4)3OH) and triple-calcium phosphate (Ca3(PO4)2) traditionally used to produce calcium-phosphate ceramics. High-temperature reactions lead to obtaining coarse-crystalline material with minimum porosity. Preparation of calcium-phosphate materials with large specific surface of the material contributes to the active bone formation compared to the dense calcium-phosphate ceramics. It was determined that compacting pressure and the packing index depends on the dispersion of materials. When compaction pressure is increased the open porosity of the material decreases by 10-15%. When sintering dense ceramics in the temperature range of 1100-1300°C the strength of the material samples increases to 130-160 MPa and open porosity decreases to 8-10%; total is 25-40% It characterizes an intensive sintering process in this temperature range. Introducing a pore-forming agent and sintering at 1250-1350°C showed that the strength improves with the increase of sintering temperature, while the open porosity ranges from 20-40% and the pore size corresponds to the size of the particles of a pore-forming agent. The results of the work allowed establishing the regularity of the influence of the quantity of pore-forming additives, sintering temperature, and the packaging index on the process of adjusting the size and number of pores for obtaining HA ceramics.
陶瓷材料的用途是多种多样的,这取决于它们的特性和应用领域。骨科和创伤学对多孔材料在骨缺损重建中的应用有很大的需求。羟基磷灰石HA (Ca5(PO4)3OH)和三磷酸钙(Ca3(PO4)2)是最接近天然骨结构和生物学特性的材料,传统上用于生产磷酸钙陶瓷。高温反应可以得到孔隙率最小的粗晶材料。与致密的磷酸钙陶瓷相比,制备具有较大比表面积的磷酸钙材料有助于活性骨的形成。确定了压实压力和填料指数取决于物料的分散性。当压实压力增加时,材料的开孔率降低10-15%。在1100 ~ 1300℃范围内烧结致密陶瓷时,材料样品的强度提高到130 ~ 160 MPa,开孔率降低到8 ~ 10%;在此温度范围内烧结过程剧烈。引入成孔剂,在1250 ~ 1350℃下烧结,强度随烧结温度的升高而提高,开孔率在20 ~ 40%之间,孔径大小与成孔剂颗粒大小相对应。研究结果建立了成孔添加剂的用量、烧结温度和包装指数对制备HA陶瓷过程中气孔大小和数量的影响规律。
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引用次数: 0
Modeling of output power in a resonant microwave compressor with the transformation of the oscillations 基于振荡变换的谐振式微波压缩机输出功率建模
Pub Date : 2012-11-26 DOI: 10.1109/IFOST.2012.6357774
V. Igumnov, V. Avgustinovich, S. Artemenko, S. Novikov, Y. Yushkov
The results of experimental studies of the interaction modes of communication on the window of a multimode waveguide resonator with a short train are presented. The experimentally determined dependence of the mode coupling parameters of the plume and windows due to the loop resonator. Based on these experiments, the model of the process of energy transfer from mode to mode in the microwave compressor with the output power fluctuations in the transformation of the resonator box with a train. Model describing a relation between the parameters of output pulses and the parameters of the compressor device mode coupling, which qualitatively agrees well with experimental data.
本文介绍了短列多模波导谐振器窗口上通信相互作用模式的实验研究结果。实验确定了环形谐振腔对羽流和窗口模式耦合参数的依赖关系。在这些实验的基础上,建立了微波压缩机中能量随输出功率波动的模态转换过程模型。该模型描述了输出脉冲参数与压缩装置模态耦合参数之间的关系,定性地与实验数据吻合较好。
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引用次数: 2
Preparation of NiO coated aluminum borate whiskers by a solgel process and an ultrasonic dispersion technique 溶胶凝胶法和超声分散法制备NiO涂层硼酸铝晶须
Pub Date : 2012-11-26 DOI: 10.1109/IFOST.2012.6357481
H. Yue, E. Guo, L. P. Wang, F. Kang, Y. K. Guo, Z. Yu
NiO coated aluminum borate whiskers were prepared by a sol-gel process and an ultrasonic dispersion technique. The preparation process and characterizations of NiO coated aluminum borate whiskers were investigated. The results show that during the heating process of the xerogel coated aluminum borate whiskers, one endothermic peak appears at 100 °C and three exothermic peaks appear in the range of 150-350 °C according to the differential thermal analysis. And no weight loss occurs after 350 °C according to the thermogravimetry analysis. After the xerogel coated aluminum borate whiskers are calcined at 500 °C, the surface of each whisker is uniformly coated by a layer of NiO film and the NiO coated whiskers can be easily dispersed in water through an ultrasonic apparatus. Moreover, No phase transformation of NiO and interfacial reaction between NiO and aluminum borate whiskers occur when the xerogel coated aluminum borate whiskers are calcined in the range of 500 and 900 °C.
采用溶胶-凝胶法和超声分散法制备了NiO涂层硼酸铝晶须。研究了NiO涂层硼酸铝晶须的制备工艺及表征。结果表明:根据差热分析,在干燥凝胶涂层硼酸铝晶须的加热过程中,在100℃时出现一个吸热峰,在150 ~ 350℃范围内出现三个放热峰。经热重分析,350℃后无失重现象。在500℃下煅烧后,每根晶须表面均匀地包裹一层NiO薄膜,通过超声波装置可以很容易地将NiO涂层晶须分散在水中。此外,在500 ~ 900℃的高温下,经静电凝胶涂层的硼酸铝晶须未发生NiO相变和NiO与硼酸铝晶须之间的界面反应。
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引用次数: 1
Synthesis of crystalline phases in the system «carbon-nitrogen» in a hypervelocity electric discharge plasma jet 超高速放电等离子体射流中“碳-氮”体系结晶相的合成
Pub Date : 2012-11-26 DOI: 10.1109/IFOST.2012.6357548
A. Sivkov, A. Pak, I. Shanenkov, D. Nikitin, Y. Kolganova
The possibility is shown to synthesize a nanodispersed powder in the system “carbon-nitrogen” in a hypervelocity electrical discharge plasma jet generated by a coaxial magnetoplasma accelerator (CMPA). The plasma shot is provided in the pressurized chamber filled with the gaseous nitrogen. Up to 1 gram of black powdered product is synthesized for one working cycle having a duration about 100 ms. According with the X-ray diffraction and transmitting electron microscopy data, the product consists of two main crystalline phases such as graphite and the structure closed to the αC3N4 structure.
在同轴磁等离子体加速器(CMPA)产生的超高速放电等离子体射流中,在“碳-氮”体系中合成纳米分散粉末的可能性。等离子体在充满气态氮的加压室中提供。最多1克的黑色粉末产品合成一个工作周期,持续时间约为100毫秒。根据x射线衍射和透射电镜数据,该产物由石墨和接近αC3N4结构的两种主要晶相组成。
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引用次数: 0
A new approach for collaborative Enterprise Architecture development 协作式企业架构开发的新方法
Pub Date : 2012-11-26 DOI: 10.1109/IFOST.2012.6357672
V. Agievich, V. Taratukhin, J. Becker, R. Gimranov
One of the challenges of Enterprise Architecture (EA) in large companies is organizing processes of baseline EA development and change management under conditions of steady change that are introduced by implemented and changed IT solutions. The research paper describes a new approach of developing and keeping relevant baseline EA description together with IT project teams using Solution Architecture models. The approach is in the process of implementation in one of the leading Russian oil and gas companies Surgutneftegas.
在大型公司中,企业架构(EA)的挑战之一是在稳定变化的条件下组织基线EA开发和变更管理的过程,这些变化是由已实现和已更改的IT解决方案引入的。该研究报告描述了一种与IT项目团队一起使用解决方案体系结构模型开发和保持相关基线EA描述的新方法。该方法正在俄罗斯一家领先的石油和天然气公司Surgutneftegas实施。
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引用次数: 13
The control system of industrial plant for large reflectors ion-plasma coating 大型反射器-等离子涂层工业装置控制系统
Pub Date : 2012-11-26 DOI: 10.1109/IFOST.2012.6357781
O. Paschenko, A. Soloviev, S. Yudakov
The control system of industrial plant for ion-plasma treatment of large reflectors is presented in the report. Brief description of the structure and technological capabilities of the plant is given. The selection of structure of the control system and master controller is justified. The principles of the controller executive program are described. Design features of the control system are given.
本文介绍了大型反射器离子等离子体处理工业装置的控制系统。简要介绍了该装置的结构和工艺能力。对控制系统结构和主控制器的选择进行了论证。介绍了控制器执行程序的原理。给出了控制系统的设计特点。
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引用次数: 1
Effect of RE element addition and processing parameters on the shear strength and interfacial IMCs of SAC solder joints 稀土元素添加量及工艺参数对SAC焊点抗剪强度及界面IMCs的影响
Pub Date : 2012-11-26 DOI: 10.1109/IFOST.2012.6357490
Yandan Zhu, Lifeng Wang, Yang Liu, Ye Lv
The reliability of SAC lead-free solder joints are believed to be greatly influenced by the interfacial intermetallic compounds (IMCs) between solders and substrates. Our previous works investigated the effects of minimal rare earth (RE) elements addition on the interfacial IMCs under different aging time. Experimental results showed that the appropriate RE content is 0.07wt% La in Sn-0.3Ag-0.7Cu (SAC0307). In this paper, the influences of reflow parameters and Ce addition on the IMCs of SAC0307-0.07La/Cu solder joints were studied. The morphologies of IMCs were characterized by metallographic microscope (OM) and scanning electron microscope (SEM). Besides, the shear strength of the solder joints was evaluated by the shear tests. In comparison purpose, all the solder balls were prepared under the same conditions. The results showed that the thicknesses of the IMCs increased following the linear law and the shear strength varied under the parabolic law with the increase of reflow time. Meanwhile, the shear strength of the solder joints increased almost linearly with the increase of the cooling rate. The main failure mode was ductile fracture when the shear speed was 0.05mm/s.
钎料与衬底之间的界面金属间化合物(IMCs)对SAC无铅焊点的可靠性影响很大。前人研究了不同时效时间下稀土元素添加量对界面IMCs的影响。实验结果表明,Sn-0.3Ag-0.7Cu (SAC0307)中稀土元素的适宜含量为0.07wt% La。本文研究了回流参数和Ce添加量对SAC0307-0.07La/Cu焊点IMCs的影响。采用金相显微镜(OM)和扫描电镜(SEM)对IMCs的形貌进行了表征。并通过剪切试验对焊点的抗剪强度进行了评价。作为比较,在相同的条件下制备了所有的焊料球。结果表明:随着回流时间的增加,复合材料的厚度呈线性增长规律,抗剪强度呈抛物线型变化规律;同时,随着冷却速度的增加,焊点的抗剪强度几乎呈线性增加。剪切速度为0.05mm/s时,主要破坏模式为韧性断裂。
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引用次数: 0
Use of variative modeling for the identification of random signals 使用变分模型来识别随机信号
Pub Date : 2012-11-26 DOI: 10.1109/IFOST.2012.6357662
V. Gubarev, O. Alsova, N. V. Abalov, G. A. Melnikov
The essence of variative (multivariant) modeling, its bases, variety, and examples of application for identification and forecasting of time series of waterborne infectious diseases are considered.
考虑了变(多)变模型的本质、基础、种类以及在水传播传染病时间序列识别和预测中的应用实例。
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引用次数: 1
Study on ambient air quality in the Erdenet city 额尔登特市环境空气质量研究
Pub Date : 2012-11-26 DOI: 10.1109/IFOST.2012.6357686
D. Bolor-Erdene, D. Ganbaatar, D. Shagjjamba, N. Tugjsuren
In this paper presents first results of the study on ambient air quality in Erdenet city. The work performed sampling of particle concentration and elemental valuable data. Determined for each of PM2,5 cities air particulate. Research results show, dust concentration is tostly more than national level in all seasons.
本文介绍了额尔登特市环境空气质量研究的初步结果。该工作进行了颗粒浓度和元素有价值数据的采样。测定了5个城市空气颗粒物的pm2.5浓度。研究结果表明,各季节扬尘浓度均高于全国水平。
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引用次数: 0
Effect of advanced thermal management systems on hybrid electric drive units 先进热管理系统对混合动力驱动装置的影响
Pub Date : 2012-11-26 DOI: 10.1109/IFOST.2012.6357678
W. Nessim, Fujun Zhang, Zhao Chang-lu, Zhu Zhenxia
In recent years, a significant interest in hybrid electric power unit has arisen globally due to its reliability and efficiency. This paper will discuss the benefits of using advanced thermal management systems in hybrid electric drivetrain, and the different control strategies that can be used to enhance system performance. A detailed one dimensional (1D) simulation model for power split hybrid electric system was developed which consists of three cooling circuits. This model is characterized by a complete modularity and permits the simulation of any new design configuration to investigate the effect of advanced thermal management on system performance. Proportional Integration Derivative (PID) module was used to apply the control strategies. The system behavior has been optimized using Design of Experiment (DoE) method. The simulation results showed a superb fuel economy (4:11) % that solves the problems of high operating costs, also decreasing time of cold start by 50% and increasing the high temperature of the coolant up to 125°C. The motor and generator temperature controlled to the optimum temperature which operate them at the maximum efficiency. These results can be used to be the basis of the final system layout and thermal management strategy.
近年来,由于混合动力装置的可靠性和效率,全球对其产生了极大的兴趣。本文将讨论在混合动力传动系统中使用先进的热管理系统的好处,以及可用于提高系统性能的不同控制策略。建立了由三个冷却回路组成的功率分流混合动力系统的详细一维仿真模型。该模型的特点是一个完整的模块化,并允许模拟任何新的设计配置,以研究先进的热管理对系统性能的影响。采用比例积分导数(PID)模块实现控制策略。采用实验设计(DoE)方法对系统性能进行了优化。仿真结果表明,该系统具有优异的燃油经济性(4:11)%,解决了运行成本高的问题,冷启动时间缩短了50%,冷却液的高温可达125°C。电机和发电机的温度控制在最佳温度,使它们以最高效率运行。这些结果可以作为最终系统布局和热管理策略的基础。
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引用次数: 0
期刊
2012 7th International Forum on Strategic Technology (IFOST)
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