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排序方式: 共有367条查询结果,搜索用时 31 毫秒
41.
This paper deals with the reaction of dense Metastable Intermolecular Composite (MIC) materials, which have a higher density than conventional energetic materials. The reaction of a multilayer thin film of aluminum and copper oxide has been studied by varying the substrate material and thicknesses. The in-plane speed of propagation of the reaction was experimentally determined using a time of- flight technique. The experiment shows that the reaction is completely quenched for a silicon substrate having an intervening silica layer of less than 200 nm. The speed of reaction seems to be constant at 40 m/s for silica layers with a thickness greater than 1 μm. Different substrate materials such as glass and photoresist were also used. 相似文献
42.
Baikov Pavel Ranganathan Kamalakannan Goldfarb Ilan Ruzin Arie 《Journal of Materials Science: Materials in Electronics》2022,33(28):22230-22243
Journal of Materials Science: Materials in Electronics - A comprehensive understanding of the resistive switching mechanisms that activate REDOX-based random access memory devices is necessary to... 相似文献
43.
Beldjebli Ouidad Bensaha Rabah Panneerselvam Pratheep 《Journal of Inorganic and Organometallic Polymers and Materials》2022,32(5):1624-1636
Journal of Inorganic and Organometallic Polymers and Materials - The synthesis of active thin films supported on substrates overcomes the drawbacks of powder-based photocatalysis and energy... 相似文献
44.
Syed Ubaid Ahmed Panneerselvam Ranganathan Ashok Pandey Savithri Sivaraman 《Journal of Bioscience and Bioengineering》2010,109(6):588-597
In the present study, experiments have been carried out to identify various flow regimes in a dual Rushton turbines stirred bioreactor for different gas flow rates and impeller speeds. The hydrodynamic parameters like fractional gas hold-up, power consumption and mixing time have been measured. A two fluid model along with MUSIG model to handle polydispersed gas flow has been implemented to predict the various flow regimes and hydrodynamic parameters in the dual turbines stirred bioreactor. The computational model has been mapped on commercial solver ANSYS CFX. The flow regimes predicted by numerical simulations are validated with the experimental results. The present model has successfully captured the flow regimes as observed during experiments. The measured gross flow characteristics like fractional gas hold-up, and mixing time have been compared with numerical simulations. Also the effect of gas flow rate and impeller speed on gas hold-up and power consumption have been investigated. 相似文献
45.
Arnaud Duchosal René Leroy Laurent Vecellio Christophe Louste N. Ranganathan 《The International Journal of Advanced Manufacturing Technology》2013,66(5-8):1003-1014
In this study, a method is developed to determine the oil mist characteristics for the minimal quantity lubricant process. The oil mist is characterized by the size, velocity, and volume flow rate of its particles. In each case, a specific measurement process is used: the laser diffraction granulometry method, the particle image velocimetry, and the gravimetric method. These methods are used in the case of static and simple models with different inner channels. Experimental tests have been done with the same inner channel as the existing spindle inner channel. Different output models with different inner canalizations have been tested, using these experimental processes. The main goal is to control the characteristics of output oil mist as a function of the input oil mist device parameters. 相似文献
46.
Changes in the grain size and crystallographic texture during warm working and their influence on the room temperature mechanical
properties are investigated on Cd, Zn and a Zn-Al alloy. The yield strength increase in the early stages of working in extruded
cadmium is accounted for based on the development of a basal texture while in rolled zinc and zinc alloy, the properties are
affected more by the grain size. Cadmium exhibits ductile fracture at all extrusion ratios whereas the fracture mode in zinc
and the alloy changes from cleavage at small rolling strains to ductile at higher deformation strains. 相似文献
47.
Mukherjee A. Ranganathan N. Flieder J. Acharya T. 《Very Large Scale Integration (VLSI) Systems, IEEE Transactions on》1993,1(2):203-214
Describes the architecture and design of a CMOS VLSI chip for data compression and decompression using tree-based codes. The chip, called MARVLE, implements a memory-based architecture for variable length encoding and decoding based on tree-based codes. The architecture is based on an efficient scheme of mapping the tree representing any binary code onto a memory device. A prototype 2-mm CMOS VLSI chip has been designed, verified, and fabricated by the MOSIS facility. The chip has a 512×12 static RAM with an access time of 4 ns and logic circuitry for compression as well as decompression. The chip occupies a silicon area of 6.8 mm×6.9 mm and consists of 49695 transistors. The prototype chip yields a compression rate of 95.2 Mb/s and a decompression rate of 60.6 Mb/s with a clock rate of 83.3 MHz. The VLSI hardware can be used to implement the JPEG baseline compression scheme 相似文献
48.
Reasoning about uncertain contexts in pervasive computing environments 总被引:11,自引:0,他引:11
Context-aware systems can't always identify the current context precisely, so they need support for handling uncertainty. A prototype pervasive computing infrastructure, Gaia, allows applications and services to reason about uncertainty using mechanisms such as probabilistic logic, fuzzy logic, and Bayesian networks. 相似文献
49.
Chandramouli R. Vijaykrishnan N. Ranganathan N. 《Reliability, IEEE Transactions on》1998,47(4):463-471
We propose a sequential probability ratio test (SPRT) based on a 2-parameter Weibull distribution for integrated-circuit (IC) failure analysis. The shape parameter of the Weibull distribution characterizes the decreasing, constant, or increasing failure rate regions in the bath tub model for IC. The algorithm (SD) detects the operating region of the IC based on the observed failure times. Unlike the fixed-length tests, the SD, due to its sequential nature, uses the minimum average number of devices for the test for fixed error tolerances in the detection procedure. We find that SD is, on average, 96% more statistically efficient than the fixed-length test. SD is highly robust to the variations in the model parameters, unlike other existing sequential tests. Since the accuracy of the tests and the test length are conflicting requirements, we also propose a truncated SD which allows a better control of this tradeoff. It has both the sequential nature of examining measurements and the fixed-length property of guaranteeing that the tolerances be met approximately with a specified number of available measurements 相似文献
50.