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Communication-Based Train Control (CBTC) system is an automated train control system to ensure the safe operation of rail vehicles using data communication. Bidirectional wireless train–ground communications is used to transfer control data between trains and wayside equipment. Wireless local area network (WLAN) based CBTC has impact on train control performance while taking handoff decisions. This may leads to communication interrupt and long latency. Inorder to minimize the handoff latency and to improve the performance, a handoff scheme in CBTC system based on WLANs with multiple-input-multiple-output is proposed.
This paper present a system which can efficiently detect fire after the image of the area has been captured by a camera. Fire has destructive properties which cannot be tolerated in any work areas. Fire is the rapid oxidation of a material in the exothermic chemical process of combustion, releasing heat and light. The light parameter and color of flame helps in detecting fire. The system first detects smoke and then fire. When smoke is present in the area it displays a message on the Security terminal. When a fire breaks in the area under consideration, the corresponding fire region in the input video frame will be segmented which covers the fire. If the area of the flame increases in the subsequent frames then an alarm is sounded.
The paper presents the modeling, simulation and analysis of an AC-DC converter based PWM rectifier. It provides a suitable control algorithm for a pulse width modulation rectifier which reduces ripple from the DC output side as well as shapes the input current properly. The basic objective of a PWM rectifier is to regulate the DC output voltage and also ensure a sinusoidal input current and unity power factor operation. This is implemented by high speed IGBT switches connected in anti parallel mode across the rectifier diodes
This Paper Summarizes components, functionality, calculations, & challenges faced by an on-going project on water heating system utilizing waste-heat. The Source & the Sink of the system are also outlined. The structural integrity aspects are highlighted. Moreover future dimensions of the project are discussed as well
Gate diffusion input (GDI)—A new technique of lowpower digital combinatorial circuit design is described. This technique allows reducing power consumption, propagation delay, and area of digital circuits while maintaining low complexity of logic design. Performance comparison with traditional CMOS and various pass-transistor logic design techniques is presented. The different methods are compared with respect to the layout area, number of devices, delay, and power dissipation.
Richardson, Texas 6. november 2014 - NetPower kunngjør lanseringen av to 24V inngang 1/32 murstein DC-DC omformere MRS2050x008 (5V / 8A) og MRS2120x003 (12V / 3A). Med utgangseffekt opp til 40W og virkningsgrad på opptil 88%, disse MRS2 DC-DC omformere er bransjens første 1/32 murstein tilbud i 18 - 36V input range. Utgangsspenningene av disse isolerte MRS2 DC-DC omformere er strengt regulert. Bare 0.92''x0.75''x0.37 måle '', MRS2 DC-DC omformere ta mye mindre plass enn andre 40W isolert DC-DC omformere på markedet. MRS2 DC-DC omformere har innebygd beskyttelse mot innspill under spenning, utgang overspenning / overstrøm og modulen over temperatur. Valgfrie funksjoner inkluderer positive / negative aktiver logikk, gjennom-hulls pinner i forskjellig lengde, SMT pins, og bunnplate for bedre termisk ytelse. MRS2050x008 og MRS2120x003 DC-DC omformere er nå tilgjengelig. Kontakt email@example.com for informasjon og støtte.
- Electrical discharge machining (EDM) is one of the most extensively disseminated manufacturing technologies, in particular as regards the generation of precise and difficult geometrical shapes on hard metallic components. The objective of this paper is to Study on Effect of Powder Mixed dielectric in EDM of Inconel 718. The effect of various powder mixed in dielectric is studied input parameters like Duty cycles, current, pulse on time and powder media in that Silicon carbide, Aluminium oxide, Graphite powder used. Machining characteristics measured in terms of Material removal rate, tool wear rate. To obtain the optimal process parameter combination, optimization is carried out by the Signal-to-Noise (S/N) ratio analysis of Taguchi method using L18 Orthogonal Array. An analysis of variance (ANOVA) is used to present the influence of process parameters on material removal rate, tool wear rate. Results obtained by Taguchi method and by ANOVA method, are compared
In this paper, fuzzy modeling of distance between Intuitionistic fuzzy sets (four inputs–one output and two inputs– one output) were developed to test the hypothesis that high job demands and low job control (job strain) are associated with elevated free cortisol levels early in the working day and with reduced variability across the day and to evaluate the contribution of anger expression to this pattern. The models were derived from multiple data sources including One hundred five school teachers (41 men and 64 women) classified 12 months earlier as high (N = 48) or low (N = 57) in job strain according to the demand/control model sampled saliva at 2-hour intervals from 8:00 to 8:30 hours to 22:00 to 22:30 hours on a working day. Comparison of the models show that the four input model exhibited less entropy than the two input model using distance between Intuitionistic fuzzy sets.
Evaluation of frequency reconfigurable patch antennas for multi-standard personal communication systems, using PIN diodes as switches. Two different configurations are studied with dual-band behavior: a patch antenna with two switchable slots; and a rectangular patch with a switchable parasitic element. One of the objectives is to evaluate the reliability of the simulation software to design and predict the performance of reconfigurable antennas with embedded active elements. These antennas were fabricated and the measured results show good agreement withthe simulations. Each of the designed antennas enable electronic switching of the operating frequency, while maintaining good input impedance match and stable radiation characteristics.
Decision making is an important aspect of any business entity. In this paper, a new linguistic methodology is suggested in order to express the results obtained by analyzing the situations in a way that can be easily understood by non- experts users through fuzzy logic. The paper will further explain the relationship between variable through the application of fuzzy Logic. The model will be useful to understand better the system as compared to statistical results. It will also allow us to confront both kind of results considering that statistical analysis that are more discriminatory while fuzzy models show a broader vision. The model will let us understand the input variables behavior according to variations in output variables, therefore strategic planning possibilities are increased as no implementation is required. The use of decision support systems (DSS) is increasing and becoming generalized and it actually is the evolution of business computing networking