Pub Date : 2006-10-01DOI: 10.1109/IFOST.2006.312293
N. Pustovoy, E. Tsoy, A. G. Vostretsov, A. Vostrikov
The state management of educational and scientific development in Russia is reforming now. What are the was of reforming? What obstacles do have place? How to overcome them? Whatever the strategy of the reforms might be? These questions and the ways of Russian educational and scientific development are discussed in this paper.
{"title":"On the Ways of Russian Educational and Scientific Development","authors":"N. Pustovoy, E. Tsoy, A. G. Vostretsov, A. Vostrikov","doi":"10.1109/IFOST.2006.312293","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312293","url":null,"abstract":"The state management of educational and scientific development in Russia is reforming now. What are the was of reforming? What obstacles do have place? How to overcome them? Whatever the strategy of the reforms might be? These questions and the ways of Russian educational and scientific development are discussed in this paper.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130094192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2006-10-01DOI: 10.1109/IFOST.2006.312246
C. Ryu, Dong Hun Lee, H. Chi, Kyoung Su Kwan, Tae Hoon Kim, Ju Sung Park
This paper describes the architecture and design procedure of a DSP (digital signal processor) for the digital audio applications. The suggested DSP has fixed 24bit data structure, 6 stage pipeline, and 127 instructions. Some of the instructions are specially designed for the audio signal processing. Almost instructions are completed within a single cycle. The designed DSP has been verified by comparing the results from CBS (cycle based simulator) and those of HDL simulation through the single instruction set test and the instruction combination test, and real audio applications. Finally, we confirm by the HDL simulation that the DSP carried out successfully out ADPCM and MPEG-2 AAC decoding algorithm. The DSP core is implemented in FPGA using ALTERA Excalibur device and operates at 4MHz.
{"title":"Design of Digital Audio DSP Core","authors":"C. Ryu, Dong Hun Lee, H. Chi, Kyoung Su Kwan, Tae Hoon Kim, Ju Sung Park","doi":"10.1109/IFOST.2006.312246","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312246","url":null,"abstract":"This paper describes the architecture and design procedure of a DSP (digital signal processor) for the digital audio applications. The suggested DSP has fixed 24bit data structure, 6 stage pipeline, and 127 instructions. Some of the instructions are specially designed for the audio signal processing. Almost instructions are completed within a single cycle. The designed DSP has been verified by comparing the results from CBS (cycle based simulator) and those of HDL simulation through the single instruction set test and the instruction combination test, and real audio applications. Finally, we confirm by the HDL simulation that the DSP carried out successfully out ADPCM and MPEG-2 AAC decoding algorithm. The DSP core is implemented in FPGA using ALTERA Excalibur device and operates at 4MHz.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121835692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2006-10-01DOI: 10.1109/IFOST.2006.312354
U. Choi, K.T. Kim, Y.N. Kim, S. Kwak, K. Kim, S.D. Lee, S. Jang, K. Becksteard
The goals for the SHEV (series hybrid electric vehicle) such as transit bus and truck are to achieve increased fuel economy, while reducing emissions and maintaining the functionally of the heavy duty vehicle. The power generator is used as an important component of backup power systems in a series hybrid system which is one type of electric hybrid propulsion systems devised to enhance the fuel efficiency of a vehicle. The developed power generator (PG) system is for the vehicle system application. The system is composed of a diesel engine and a 60 kW induction generator and their control units. The traction motor is driven by a battery bank that is in parallel with power generator. The DC output of the system is driven to the high voltage DC link with a battery bank and supplies electrical power to charge the battery bank or to power loads in the DC link. This paper describes the power generator system's specifications, the control block diagram and the result of fuel efficiency tests carried out to evaluate the system's performance in reduction of fuel consumption.
{"title":"Development of the Power Generator for Series Hybrid Electric Vehicle","authors":"U. Choi, K.T. Kim, Y.N. Kim, S. Kwak, K. Kim, S.D. Lee, S. Jang, K. Becksteard","doi":"10.1109/IFOST.2006.312354","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312354","url":null,"abstract":"The goals for the SHEV (series hybrid electric vehicle) such as transit bus and truck are to achieve increased fuel economy, while reducing emissions and maintaining the functionally of the heavy duty vehicle. The power generator is used as an important component of backup power systems in a series hybrid system which is one type of electric hybrid propulsion systems devised to enhance the fuel efficiency of a vehicle. The developed power generator (PG) system is for the vehicle system application. The system is composed of a diesel engine and a 60 kW induction generator and their control units. The traction motor is driven by a battery bank that is in parallel with power generator. The DC output of the system is driven to the high voltage DC link with a battery bank and supplies electrical power to charge the battery bank or to power loads in the DC link. This paper describes the power generator system's specifications, the control block diagram and the result of fuel efficiency tests carried out to evaluate the system's performance in reduction of fuel consumption.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125487676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2006-10-01DOI: 10.1109/IFOST.2006.312341
Seong-Nam Jeong, Kyoung-Hang Woo, Eoun-Taeg Hwang, Won Choi
In this paper, we proposed a new algorithm that can be detected impact position on LPMS using the characteristic of RMS (root mean square) values and analysis of frequency. The proposed estimation algorithm of impact position uses the arriving difference time method using the analysis of frequency and the RMS value. The LPMS (loose parts monitoring system) are used for detecting and evaluating metallic loose parts in reactor systems. On experiment, we use the modeling steel drum instead of real reactor and 4 accelerometer sensors for acquiring the impact signal. And the computer is connected the accelerometer sensor input and used for monitoring and analyzing of impact signal with Lab-view and Matlab programs. It is efficiently used for reducing processing time and estimated impact position.
{"title":"A Study on the Estimation Method of Impact Position Using the Frequency Analysis","authors":"Seong-Nam Jeong, Kyoung-Hang Woo, Eoun-Taeg Hwang, Won Choi","doi":"10.1109/IFOST.2006.312341","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312341","url":null,"abstract":"In this paper, we proposed a new algorithm that can be detected impact position on LPMS using the characteristic of RMS (root mean square) values and analysis of frequency. The proposed estimation algorithm of impact position uses the arriving difference time method using the analysis of frequency and the RMS value. The LPMS (loose parts monitoring system) are used for detecting and evaluating metallic loose parts in reactor systems. On experiment, we use the modeling steel drum instead of real reactor and 4 accelerometer sensors for acquiring the impact signal. And the computer is connected the accelerometer sensor input and used for monitoring and analyzing of impact signal with Lab-view and Matlab programs. It is efficiently used for reducing processing time and estimated impact position.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126473282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2006-10-01DOI: 10.1109/IFOST.2006.312334
Ji-soon Kim, J. Kum, E. Kang, D. Nguyen, Jin-Chun Kim, Y. Kwon
In the present work, the microstructure and properties of Cu-based composites with 4.5 vol.% dispersed TiB2 particles developed by a combined process of mechanical alloying (MA), self-propagate high temperature synthesis (SHS) and spark-plasma sintering (SPS) will be reported. The microstructure of the composites revealed that the TiB2 dispersoids with the particle size of smaller than 250 nm uniformly distributed in Cu matrix. The sintered samples obtained approximately 99% in relative density after sintering at 650 degC for 5 min. The fine dispersed TiB2 dispersoids in Cu matrix was the main reason to improve the mechanical properties of the composites. The hardness reached a value of 74 HRB. The result of tensile test showed that the ultimate tensile strength, yield strength and Young modulus increased from 187 MPa, 158 Mpa and 119 GPa for pure Cu to 485.7 MPa, 355.3 MPa and 157 GPa for the composites, whereas the electrical conductivity remained a high value of 83 % IACS. After soaking at 850, 900 and 950 degC, the hardness of composites decreased to 62, 61 and 55 HRB, respectively. The softening temperature was determined to be higher than 900 degC.
{"title":"Microstructure and Property of TiB2-Dispersed Cu-matrix Composites","authors":"Ji-soon Kim, J. Kum, E. Kang, D. Nguyen, Jin-Chun Kim, Y. Kwon","doi":"10.1109/IFOST.2006.312334","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312334","url":null,"abstract":"In the present work, the microstructure and properties of Cu-based composites with 4.5 vol.% dispersed TiB2 particles developed by a combined process of mechanical alloying (MA), self-propagate high temperature synthesis (SHS) and spark-plasma sintering (SPS) will be reported. The microstructure of the composites revealed that the TiB2 dispersoids with the particle size of smaller than 250 nm uniformly distributed in Cu matrix. The sintered samples obtained approximately 99% in relative density after sintering at 650 degC for 5 min. The fine dispersed TiB2 dispersoids in Cu matrix was the main reason to improve the mechanical properties of the composites. The hardness reached a value of 74 HRB. The result of tensile test showed that the ultimate tensile strength, yield strength and Young modulus increased from 187 MPa, 158 Mpa and 119 GPa for pure Cu to 485.7 MPa, 355.3 MPa and 157 GPa for the composites, whereas the electrical conductivity remained a high value of 83 % IACS. After soaking at 850, 900 and 950 degC, the hardness of composites decreased to 62, 61 and 55 HRB, respectively. The softening temperature was determined to be higher than 900 degC.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133985627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2006-10-01DOI: 10.1109/IFOST.2006.312308
V. Maksimenko, E. Podruzhin
The bending problem of an anisotropic finite plate with smooth boundary containing defects like nonintersecting through thickness curvilinear cracks and rigid inclusions is considered. The problem is solved by the Lekhnitskii method of complex potentials written in the form of Cauchy-type integrals along the defect contours with unknown integrand density function which has the root type singularity on the defect tips. The boundary-value problem is reduced to a system of singular integral equations subject to the conditions for the displacements to be single-valued upon circulating the closed contours around the cuts and equilibrium conditions for rigid inclusions. To illustrate the efficiency of the method proposed, some specific plate bending problems are solved. The stress distribution in the vicinity of the defect tips are studied for various plate configurations and orientation of defects. For isotropic plates, the solutions are obtained by setting appropriate numerical values of the anisotropic constants.
{"title":"Singular Integral Equations for the Bending Problems of Multiconnected Anisotropic Finite Plates","authors":"V. Maksimenko, E. Podruzhin","doi":"10.1109/IFOST.2006.312308","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312308","url":null,"abstract":"The bending problem of an anisotropic finite plate with smooth boundary containing defects like nonintersecting through thickness curvilinear cracks and rigid inclusions is considered. The problem is solved by the Lekhnitskii method of complex potentials written in the form of Cauchy-type integrals along the defect contours with unknown integrand density function which has the root type singularity on the defect tips. The boundary-value problem is reduced to a system of singular integral equations subject to the conditions for the displacements to be single-valued upon circulating the closed contours around the cuts and equilibrium conditions for rigid inclusions. To illustrate the efficiency of the method proposed, some specific plate bending problems are solved. The stress distribution in the vicinity of the defect tips are studied for various plate configurations and orientation of defects. For isotropic plates, the solutions are obtained by setting appropriate numerical values of the anisotropic constants.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117011096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2006-10-01DOI: 10.1109/IFOST.2006.312313
C. Ohn, G. Chung
This paper describes the ohmic contact formation of polycrystalline 3C-SiC thin-films deposited on thermally grown Si (100) wafers. In this work, the TiW (titanium tungsten) film as a contact material has been deposited by RF magnetron sputter and annealed with vacuum furnace process. The specific contact resistance of the TiW contact was measured by using the C-TLM (circular transmission line method). Contact phase and interfacial reaction between TiW and poly 3C-SiC at high temperature were also analyzed by XRD (X-ray diffraction) and SEM (scanning electron microscope). TiW/poly 3C-SiC thin-films did not show cracks on the TiW film and any interfacial reaction after annealing. Especially, when the TiW/poly 3C-SiC thin-film was annealed at 800deg for 30 min., the lowest contact resistivity of 2.90times10-5 Omega-cm2 was obtained owing to the improved interfacial adhesion. Therefore, the good ohmic contact of poly 3C-SiC thin-films using the TiW thin-film are very suitable for microsensor applications in vehicle engine fields.
{"title":"Ohmic Contacts of Polycystalline 3C-SiC Thin-Films Grown on Si (100) Wafers for Microsensors of Vehicle Engines","authors":"C. Ohn, G. Chung","doi":"10.1109/IFOST.2006.312313","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312313","url":null,"abstract":"This paper describes the ohmic contact formation of polycrystalline 3C-SiC thin-films deposited on thermally grown Si (100) wafers. In this work, the TiW (titanium tungsten) film as a contact material has been deposited by RF magnetron sputter and annealed with vacuum furnace process. The specific contact resistance of the TiW contact was measured by using the C-TLM (circular transmission line method). Contact phase and interfacial reaction between TiW and poly 3C-SiC at high temperature were also analyzed by XRD (X-ray diffraction) and SEM (scanning electron microscope). TiW/poly 3C-SiC thin-films did not show cracks on the TiW film and any interfacial reaction after annealing. Especially, when the TiW/poly 3C-SiC thin-film was annealed at 800deg for 30 min., the lowest contact resistivity of 2.90times10-5 Omega-cm2 was obtained owing to the improved interfacial adhesion. Therefore, the good ohmic contact of poly 3C-SiC thin-films using the TiW thin-film are very suitable for microsensor applications in vehicle engine fields.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132450766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2006-10-01DOI: 10.1109/IFOST.2006.312291
O. Ganbaatar
This paper presents the central heating network of Erdenet city. This central heating network is in heating network plant at thermal power plant disposal and its is bounded by central heat distributing wall. Also, the paper presents steps that must be implemented for the heating supply plant to be in perfect working order. It is imperative that the heating system is completely up-graded in order to cope with individual adjustment of heat consumption and to control energy limits with regard to the internal and external factors.
{"title":"Presence and Future Prospects of Central Heating Supply of Erdenet City","authors":"O. Ganbaatar","doi":"10.1109/IFOST.2006.312291","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312291","url":null,"abstract":"This paper presents the central heating network of Erdenet city. This central heating network is in heating network plant at thermal power plant disposal and its is bounded by central heat distributing wall. Also, the paper presents steps that must be implemented for the heating supply plant to be in perfect working order. It is imperative that the heating system is completely up-graded in order to cope with individual adjustment of heat consumption and to control energy limits with regard to the internal and external factors.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132140063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2006-10-01DOI: 10.1109/IFOST.2006.312264
S. Chu
One of the two spindles in the X-lift broke suddenly during normal operation. The location of the breakage is where considerable stress concentration occurs and moreover the bending moment is at the maximum. Macrofractographic features associated with rotating-bending fatigue are evident on the fracture surface. The measured surface strain of the spindle varies cyclically as the spindle rotates and supports the rotating-bending fatigue. The X-lift is not perfectly symmetrical with respect to the horizontal plane. The unsymmetrical deformation can occur and cause the bending of the spindle. The 3-D finite element analysis of the X-lift revealed the bending of the spindle.
x -升降机的两根主轴在正常运转时突然断了。断裂的位置是应力集中较大且弯矩最大的位置。与旋转弯曲疲劳相关的宏观断口特征在断口表面很明显。测得的主轴表面应变随主轴旋转和支撑旋转弯曲疲劳而周期性变化。x升力相对于水平面不是完全对称的。会产生不对称变形，造成主轴弯曲。X-lift的三维有限元分析揭示了主轴的弯曲。
{"title":"Fracture Analysis of a Spindle in the X-Lift","authors":"S. Chu","doi":"10.1109/IFOST.2006.312264","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312264","url":null,"abstract":"One of the two spindles in the X-lift broke suddenly during normal operation. The location of the breakage is where considerable stress concentration occurs and moreover the bending moment is at the maximum. Macrofractographic features associated with rotating-bending fatigue are evident on the fracture surface. The measured surface strain of the spindle varies cyclically as the spindle rotates and supports the rotating-bending fatigue. The X-lift is not perfectly symmetrical with respect to the horizontal plane. The unsymmetrical deformation can occur and cause the bending of the spindle. The 3-D finite element analysis of the X-lift revealed the bending of the spindle.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116372587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2006-10-01DOI: 10.1109/IFOST.2006.312320
V. A. Bogdanovich, A. G. Vostretsov
A new approach to synthesis of asymptotically invariant optimal algorithm for detection of a signal with selective fading was developed. Synthesized algorithm has such useful property as the invariance of its characteristics with respect to statistical dependence of the quadrature components of noise at coinciding time points. When using the algorithm we can put no attention to such dependence of the noise.
{"title":"Asymptotically Invariant Optimal (AIO) Algorithm for Detection of a Signal with Selective Fading","authors":"V. A. Bogdanovich, A. G. Vostretsov","doi":"10.1109/IFOST.2006.312320","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312320","url":null,"abstract":"A new approach to synthesis of asymptotically invariant optimal algorithm for detection of a signal with selective fading was developed. Synthesized algorithm has such useful property as the invariance of its characteristics with respect to statistical dependence of the quadrature components of noise at coinciding time points. When using the algorithm we can put no attention to such dependence of the noise.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117235149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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