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排序方式: 共有148条查询结果,搜索用时 15 毫秒
1.
RM Bionta G Blewitt CB Bratton D Casper A Ciocio R Claus M Crouch ST Dye S Errede GW Foster W Gajewski KS Ganezer M Goldhaber TJ Haines TW Jones D Kielczewska WR Kropp JG Learned JM LoSecco J Matthews HS Park LR Price F Reines J Schulz S Seidel E Shumard D Sinclair HW Sobel JL Stone L Sulak R Svoboda G Thornton van der Velde JC C Wuest 《Canadian Metallurgical Quarterly》1987,36(1):30-36
2.
Quantitative real-time imaging of myocardium based on ultrasonic integrated backscatter 总被引:5,自引:0,他引:5
Thomas LJ Barzilai B Perez JE Sobel BE Wickline SA Miller JG 《IEEE transactions on ultrasonics, ferroelectrics, and frequency control》1989,36(4):466-470
The integrated backscatter calculation over the full, two-dimensional echocardiographic sector is implemented to produce images from closed-chest dogs. This new real-time integrated backscatter measurement system allows a continuous determination of integrated backscatter from all myocardial regions in the ultrasonic view. By replacing the conventional video processor in a commercial two-dimensional echocardiographic imager with this new real-time backscatter measurement system, it is possible to produce real-time two-dimensional images based on integrated backscatter. 相似文献
3.
Friedman Richard; Sobel David; Myers Patricia; Caudill Margaret; Benson Herbert 《Canadian Metallurgical Quarterly》1995,14(6):509
The use of medical services is a function of several interacting psychological and social variables as well as a function of physical malfunction. The clinical significance of addressing patients' psychosocial issues has only occasionally been considered. However, the shift in health care economics toward health care maintenance is responsible for the increased interest in interventions in the domain of behavioral medicine and health psychology. Evidence is reviewed for 6 mechanistic pathways by which behavioral interventions can maximize clinical care and result in significant economic benefits. The rationale for further integration of behavioral and biomedicine interventions is also reviewed. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
4.
Ron Kimmel Doron Shaked Michael Elad Irwin Sobel 《IEEE transactions on image processing》2005,14(6):796-803
Gamut mapping deals with the need to adjust a color image to fit into the constrained color gamut of a given rendering medium. A typical use for this tool is the reproduction of a color image prior to its printing, such that it exploits best the given printer/medium color gamut, namely the colors the printer can produce on the given medium. Most of the classical gamut mapping methods involve a pixel-by-pixel mapping and ignore the spatial color configuration. Recently proposed spatial-dependent approaches for gamut mapping are either based on heuristic assumptions or involve a high computational cost. In this paper, we present a new variational approach for space-dependent gamut mapping. Our treatment starts with the presentation of a new measure for the problem, closely related to a recent measure proposed for Retinex. We also link our method to recent measures that attempt to couple spectral and spatial perceptual measures. It is shown that the gamut mapping problem leads to a quadratic programming formulation, guaranteed to have a unique solution if the gamut of the target device is convex. An efficient numerical solution is proposed with promising results. 相似文献
5.
Ghafurian R. Dominguez J. Santini A. Sobel C. 《Power Delivery, IEEE Transactions on》1999,14(2):314-318
Through a comprehensive and aggressive research program, the Consolidated Edison Company of New York, Inc. (Con Edison) has designed, developed and installed several new products to address the environmental impact of leaked dielectric fluid from pipe-type cable systems. These include online leak detection, leak location, retractable flow direction indicator, full stop joints and transition joints. This paper describes the application of the aforementioned products on the Con Edison underground transmission system 相似文献
6.
7.
In some cases, the search for a conjunction target proceeds through the smaller group of elements in a display, whereas in others, search is limited to those elements that share a particular feature with the target. In 6 experiments, participants searched for a conjunction target among displays consisting of various proportions of 2 distractor types. Smaller-group search was more prevalent than target-feature search with denser displays and with features that were highly discriminable. Explicit instructions to limit search to a specific feature affected performance only when the discriminability of the guiding feature was much greater than the other target feature. Together, these experiments show that bottom-up factors have more influence in guiding conjunction searches than previously thought. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
8.
Design considerations for 60 GHz CMOS radios 总被引:2,自引:0,他引:2
Doan C.H. Emami S. Sobel D.A. Niknejad A.M. Brodersen R.W. 《Communications Magazine, IEEE》2004,42(12):132-140
With the availability of 7 GHz of unlicensed spectrum around 60 GHz, there is a growing interest in using this resource for new consumer applications requiring very high-data-rate wireless transmission. Historically, the cost of the 60 GHz electronics, implemented in the compound semiconductor technology, has been prohibitively expensive. A fully integrated CMOS solution has the potential to drastically reduce costs enough to hit consumer price points. System, circuit, and device-level barriers to a low-cost 60 GHz CMOS implementation are described, potential solutions are explored, and remaining challenges are discussed. 相似文献
9.
Stathmin is a ubiquitous phosphoprotein proposed to be a relay integrating various intracellular signaling pathways. Its high phylogenetic conservation and the identification of the related molecules, SCG10 in rat and XB3 in Xenopus, suggested the existence of a stathmin-related family. A systematic PCR-based approach allowed the identification of several novel mammalian sequences of which two coded for expressed members of the stathmin family; the translated RB3 sequence shares 88% amino-acid identity with that of XB3 and is thus its rat homologue, and RB3' corresponds to an alternatively spliced product of the same gene, encoding a truncated form. Within their stathmin-like domain, the alpha helix, probably responsible for coiled-coil protein-protein interactions, is conserved, as well as are two consensus phosphorylation sites; in their N-terminal extension domain, two cystein residues most likely responsible for membrane attachment through palmitoylation, are present in RB3/RB3' as in SCG10. The novel identification and characterization of the corresponding proteins showed that all three are associated with the particulate, membrane-containing fraction. They furthermore display several spots of decreasing pI on two-dimensional immunoblots, suggesting that they are phosphorylated in vivo. As for SCG10, RB3 mRNA is detectable only in the nervous system by in situ hybridization, but at similar levels in the newborn and the adult brain as revealed by Northern blots, whereas SCG10 expression decreases in the adult. Furthermore, RB3 mRNA is undetectable in PC12 cells, whereas SCG10 mRNA increases after treatment with nerve growth factor, inducing neuronal differentiation. In conclusion, we demonstrate here the existence of a highly conserved stathmin-related family in mammals, of which each member seems to play specific roles, related to the control of cell proliferation and activities for stathmin and to that of neuronal differentiation for SCG10, the novel RB3/RB3' proteins being rather related to the expression of differentiated neuronal functions. 相似文献
10.
Summary A partial correctness proof system for Brinch Hansen’s Distributed Processes (DP) is presented. Two important aspects of the
system are: Proofs of individual processes of a DP program are completely isolated from each other; in particular, no assumptions
are allowed in the proof of one process about the behavior of the other processes. Secondly a process is characterized by
its externally visible behavior, i.e. the sequence of interactions between this process and the other processes of the program.
An example demonstrates the use of the system.
This paper is an extended version of a paper presented at the Workshop on Logics of Programs, Brooklyn, New York, June 17–19,
1985 and was supported in part by the National Science Foundation under grant ECS-8404725. 相似文献