On recursive averaging processes and Hilbert space extensions of the contraction mapping principle     

J.C. Dunn 《Journal of The Franklin Institute》1973,295(2):117-133

If T maps a convex domain D_T into itself, and if {ω_n} is a real sequence with range in (0, 1] then the recursive averaging process, generates a sequence {x?_n}; with range in D_T. Under suitable conditions on D_T, T and {ω_n} the sequence {x?_n} will converge in some sense to a fixed point of T. We prove that if D_T is a closed convex subset of a complex Hilbert space H, if Tω = (1 ? ω) I + ωT is a strict contraction for some ω ? (0, 1], and if {ω_n} satisfies the conditions, and then, for arbitrary ξ ? D_T, {x?_n} converges strongly to (the unique) fixed point of T. We also prove that if D_T and {ω_n} satisfy the foregoing conditions, if T has at least one fixed point, and if Tω is non-expansive for some ω ? (0, 1], then for all ξ ? D_T, {x?_n} converges at least weakly to some fixed point of T. Finally, we apply these results to linear equations involving bounded normal operators and obtain an extension of the classical Neumann operator series.  相似文献   

Propagation through a slab of irregularities in a magneto-ionic medium     

D.M. Simonich  K.C. Yeh 《Journal of The Franklin Institute》1973,295(2):135-146

A theory is developed to describe the propagation of characteristics waves through an infinite slab of irregularities in a magneto-ionic medium. The theory makes use of the asymptotic Green's dyadic. The results show that mode conversion is possible through scattering from irregularities in an anisotropic background. Some special cases are discussed and an example is given.  相似文献   

中国法律下的知识产权质押     

RONALD .C.C  王恒福  马明宇 《中国发明与专利》2006,(11)

多种原因造成了知识产权担保在发放信贷方面的重要性不如其他财产的担保。原因之一是知识产权具有一些特殊属性,一些潜在贷款人对这种财产属性缺乏了解。另一个原因是对许多知识产权的估价存在困难,相关法律在调整这些法定权利上的担保权益方面也不甚健全。尽管金融机构及其法律顾问已经越来越多地理解了知识产权担保借贷中的诸要素,但以知识产权担保的融资仍处在初期阶段。这是一个无论在法律领域,还是在信贷实践方面都很复杂的问题。立法者在回应专门立法需求以促进其发展方面也行动缓慢。这就进一步增加了用知识产权这种价值可能很大、但寿命又可能很短的财产做担保提供信贷的不确定性。  相似文献   

Application of a transversal laguerre network in adaptive equalization     

K.M. Wong  Y.G. Jan  F.C. Lee 《Journal of The Franklin Institute》1984,317(2):105-115

Synchronous data transmission systems that transmit information over dispersive channels often employ adaptive equalization techniques in the processing of the received signals. Most equalizers presently used in communication systems are of the tapped delay line (TDL) type. In this paper, we propose a class of adaptive equalizers of which the TDL equalizer is a member. Another interesting member of this class is the Laguerre adaptive equalizer which is to be introduced in this paper. The configuration of the Laguerre equalizer is developed. It is found, as shown by the examples, that the Laguerre equalizer is more accurate, and is less sensitive to timing error than the conventional TDL equalizer.  相似文献   

Preface     

Bhaskar C. Harinath 《Indian journal of clinical biochemistry : IJCB》1997,12(1):2-2

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Host protective immunity and vaccine development studies in lymphatic filariasis     

M. V. R. Reddy  R. Alli  B. C. Harinath 《Indian journal of clinical biochemistry : IJCB》2000,15(1):127-135

Lymphatic filariasis caused mainly by infection fromWuchereria bancrofti andBrugia malayi remains as the major cause of clinical morbidity in tropical and subtropical countries. Development of vaccine against filarial infection can act as additional measure to the existing therapeutic and vector control methods in the control of this disease. The main hurdles in the development of anti-filarial vaccine are the strict primate specificity ofWuchereria bancrofti, the paucity of parasite material, the diversity of clinical manifestations and their associated complex immune responses, lack of clear understanding on host-parasite interactions and the mechanisms involved in protective immunity. However in the past few years, the information generated in immuno-epidemiological studies, correlated with observations in experimental animals suggests that a filarial vaccine is feasible. Initially live irradiated infective larvae have been successfully used to induce high level of protective immunity in several animal models. Applying diverse strategies, variety of purified or recombinant filarial antigens have been explored for their ability to induce protection in different host-parasite systems. Some of these targeted filarial antigens induced high level of resistance in experimental animals against challenge infections. More focussed studies on thorough characterization of parasitological and immunological changes associated with resistance induced by such candidate protective antigens and on delivery mechanisms and safety aspects will be crucial in their selection for possible use in humans.  相似文献   

未来艾滋病的治疗和预防     

RobertC.Gallo LucMontagnier 《中国科技信息》2002,(24):41-42

超过7000万人感染HIV、2000万人死亡,艾滋病是医学史上最严重的流行病之一.  相似文献   

Elasticity : R.W. Little. 431 pages,diagrams, 6×9 in. Prentice Hall,Englewood Cliffs,N.J., 1973. Price, $18.95 (approx. £7.85).     

Steven C. Batterman 《Journal of The Franklin Institute》1975,300(1):86-87

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Isis at seventy-five   总被引：1，自引：0，他引：1  

C Rosenberg 《Isis; an international review devoted to the history of science and its cultural influences》1987,78(294):515-517

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Poly A RNA status and expression of milli (m) and micro (μ) calpains in skeletal muscle of duchenne muscular dystrophy patients     

Harleen Mangat  Tajamul Hussain  C Sundaram  MP JS Anandaraj 《Indian journal of clinical biochemistry : IJCB》2002,17(2):74-79

Poly A RNA status and itsin vitro translation in a rabbit reticulolysate cell free system, were assessed in the skeletal muscle of young boys with Duchenne muscular dystrophy. Compared to normals there is a significant 48% increase in poly A RNA content of dystrophic muscle and its translatability was increased by 56% based on³⁵S methionine incorporation into total protein systhesised. Immunoprecipitation of the translated products with monospecific antibodies showed that there is a 2.6 fold and a 2 fold increase in m and μ calpains respectively. This underlines the importance of both synthetic and degenerative activities in the early pathology in DMD muscle.  相似文献