Backproject Filter Proj Initialize Read Proj Send Proj Write Volume 0

ثبت نشده
چکیده

by reducing the back-projection in the root process by the relative time of ltering and backprojection, an utilization of 81.8% was achieved. Symmetric Multiprocessor Computations were done on a DEC AlphaServer 2000 4/233. This machine is an SMP with 2 processors , and 256 MB of RAM. The parallel implementation with complete load balancing was used. The serial version ran in 684.2 seconds and the load balanced parallel version ran in 353.3 seconds. The speedup is therefore 1.94 and the eciency is 96.8%.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Learning Prototype Models for Tangent Distance

true: 2 true proj. pred. proj. (0) true: 5 true proj. pred. proj. (8) true: 2 true proj. pred. proj. (0) true: 9 true proj. pred. proj. (4) true: 4 true proj. pred. proj. (7) Figure 2: Some of the errors for the test set corresponding to line (3) of table 4. Each case is displayed a s a c olumn of three images. The top is the true image, the middle the tangent projection of the true image onto ...

متن کامل

Partial Differentiation on Normed Linear Spaces Rn

Let i, n be elements of N. The functor proj(i, n) yielding a function from Rn into R is defined by: (Def. 1) For every element x of Rn holds (proj(i, n))(x) = x(i). Next we state two propositions: (1) dom proj(1, 1) = R1 and rng proj(1, 1) = R and for every element x of R holds (proj(1, 1))(〈x〉) = x and (proj(1, 1))−1(x) = 〈x〉. (2)(i) (proj(1, 1))−1 is a function from R into R1, (ii) (proj(1, 1...

متن کامل

Partial Differentiation of Real Ternary Functions

For simplicity, we adopt the following convention: D is a set, x, x0, y, y0, z, z0, r, s, t are real numbers, p, a, u, u0 are elements of R3, f , f1, f2, f3, g are partial functions from R3 to R, R is a rest, and L is a linear function. We now state three propositions: (1) dom proj(1, 3) = R3 and rng proj(1, 3) = R and for all elements x, y, z of R holds (proj(1, 3))(〈x, y, z〉) = x. (2) dom pro...

متن کامل

BEDNARSKA On lifts of projectable - projectable classical linear connections to the cotangent bundle

We describe all FMm1,m2,n1,n2 -natural operators D : Qproj-proj QT ∗ transforming projectable-projectable classical torsion-free linear connections ∇ on fibred-fibred manifolds Y into classical linear connections D(∇) on cotangent bundles T ∗Y of Y . We show that this problem can be reduced to finding FMm1,m2,n1,n2 -natural operators D : Qproj-proj (T ∗,⊗pT ∗⊗⊗qT ) for p = 2, q = 1 and p = 3, q...

متن کامل

Partial Differentiation of Real Binary Functions

For simplicity, we adopt the following convention: x, x0, y, y0, r are real numbers, z, z0 are elements of R2, Z is a subset of R2, f , f1, f2 are partial functions from R2 to R, R is a rest, and L is a linear function. Next we state two propositions: (1) domproj(1, 2) = R2 and rng proj(1, 2) = R and for all elements x, y of R holds (proj(1, 2))(〈x, y〉) = x. (2) domproj(2, 2) = R2 and rng proj(...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 1996