نتایج جستجو برای: w2
تعداد نتایج: 1961 فیلتر نتایج به سال:
In this paper, we investigate multi-message authentication to combat adversaries with infinite computational capacity. An authentication framework over a wiretap channel (W1,W2) is proposed to achieve information-theoretic security with the same key. The proposed framework bridges the two research areas in physical (PHY) layer security: secure transmission and message authentication. Specifical...
OBJECTIVES We used data from the Changing Lives of Older Couples, a prospective multiwave study of 1,532 married individuals aged 65 and older, to investigate the extent to which spousal loss and death-context characteristics are associated with the stress hormone cortisol at 6 (W1) and 18 (W2) months postbereavement. METHOD We used ordinary least squares regression models to estimate the eff...
A series of 4-aminoquinolinyl-chalcone amides 11-19 were synthesized through condensation of carboxylic acid-functionalized chalcone with aminoquinolines, using 1,1'-carbonyldiimidazole as coupling agent. These compounds were screened against the chloroquine sensitive (3D7) and chloroquine resistant (W2) strains of Plasmodium falciparum. Their cytotoxicity towards the WI-38 cell line of normal ...
The central topic of the paper is the learnability of the recursively enumerable subspaces of V∞/V , where V∞ is the standard recursive vector space over the rationals with (countably) infinite dimension and V is a given recursively enumerable subspace of V∞. It is shown that certain types of vector spaces can be characterized in terms of learnability properties: V∞/V is behaviourally correct l...
Let K be a closed bounded convex subset of R; then by a result of the first author, which extends a classical theorem of Whitney there is a constant wm(K) so that for every continuous function f on K there is a polynomial φ of degree at most m− 1 so that |f(x)− φ(x)| ≤ wm(K) sup x,x+mh∈K |∆h (f ;x)|. The aim of this paper is to study the constant wm(K) in terms of the dimension n and the geomet...
برنامه CE-QUAL-W2 یک مدل فیزیکی با اطمینانپذیری بالا جهت شبیهسازی هیدرودینامیکی-کیفی مخازن بوده که هزینه محاسباتی زیادی دارد. بنابراین یافتن مدلهای جایگزین که نتایج این مدل را با دقت مطلوب و در زمان اندکی برآورد کنند از اهمیت کاربردی بالایی برخوردار است. در این تحقیق قابلیت مدل شبکه عصبی NARX به عنوان مدل جایگزین CE-QUAL-W2 جهت پیشبینی نتایج بلند مدت شوری خروجی از مخزن بررسی شده است. برای ا...
Several refinements of norm and numerical radius inequalities bounded linear operators on a complex Hilbert space are given. In particular, we show that if A is operator space, then 14A*A+AA*≤18A+A*2+A−A*2+c2(A+A*)+c2(A−A*)≤w2(A) 12A∗A+AA∗−14(A+A∗)2(A−A∗)212≤w2(A)≤12A∗A+AA∗, where ∥⋅∥, w(⋅) c(⋅) the norm, Crawford number, respectively. Further, prove A, D AD∗≤∫01(1−t)(A2+D2)/2+tAD∗I2dt12≤12A2+D...
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