The ILU-type industrial electron accelerators are developed in BINP sins 1967. Their energy range is 0.7-4.0 MeV at beam power of 20-50 kW. The comparison of the irradiation results after bilateral and four-sided irradiation of cables and tubes is given. It is shown that the required electron energy and beam power in the case of four-sided irradiation are ...

The described installations are designed for the electron beam treatment of the tubes with inner diameters of 0.4- 22mm and wall thicknesses 0.3-1mm, the bands with thickesses 0.7-3.5 mm and width up to 1.2m. These installations are based on the ILU-8 type electron accelerator with the local protection, designed in the institute of ...

A popular strategy for the numerical solution to contact problems is based on Finite Elements with the contact constraints enforced by a penalty formulation. The resulting linearized system, however, can prove severely ill-conditioned, with the iterative solution to large 3D problems requiring expensive ILU-type preconditioners to converge. In the present communication a novel ...

The possibility of the single-use syringes sterilization inside the standard production packs was tested using the accelerator type ILU-6 with the energy up to 2.5 MeV and the electron beam power up to 20 KW. The syringes were placed vertically (along the beam direction), and the irradiation was made from two sides. The dosimetry ...

Several solution acceleration techniques, used to obtain steady state CFD solutions as quickly as possible, are applied to an implicit, upwind Euler solver to evaluate their effectiveness. The implicit system is solved using either ADI or ILU and the solution acceleration techniques evaluated are quasi-Newton iteration, Jacobian ...

This paper tests a number of incomplete lower-upper (ILU)-type preconditioners for solving indefinite linear systems, which arise from complex applications such as computational fluid dynamics (CFD). Both point and block preconditioners are considered. The paper focuses on ILU factorization that can be computed with high accuracy by allowing liberal ...

ILU-8TP system was designed for electron beam curing of thick-film pastes in the frame of screen-and-fire technological process of production of hybrid integrated circuits (HIC). It comprises electron accelerator ILU-8 (electron beam energy 1 MeV, power 20 kW), X-ray shielding, three internal conveyors and associate support devices. ...

We have acquired the experience in the use of the linear electron accelerators type ILU in two main technological directions. The first one is the radiation-induced immobilization of various biologically active substances on polymer matrix. The second one is the radiation-induced linkage of low molecular polyethilenoxides in water ...

A real-time measurement system of the spatial dose distribution is developed and realized for monitoring the bremsstrahlung flow generated on X-ray target by 5MeV 50kW electron accelerator. The sensors of the system consist of semiconductor diodes. The beam target and electron accelerator (ILU-10) are briefly described. The practice of ...

The possibility is discussed of simulating radiation porosity on an accelerator of charged particles (100 keV). A dose dependence for nickel swelling has been obtained in irradiation with nickel ions (46 keV, 550 deg C, dosages from 2.10 exp 16 to 3.2.10 ...

We consider the preconditioned iterative solution of large dense linear systems, where the coefficient matrix is a complex valued matrix arising from discretizing the integral equation of electromagnetic scattering. For some scattering structures this matrix can be poorly conditioned. The main purpose of this study is to evaluate the efficiency of a class of incomplete LU ...

The converters were designed for generation of intensive bremsstrahlung radiation. The powerful electron beam (5MeV, 50kW) was generated by ILU-10 accelerator. The converters differ in technology of manufacturing and material of target, tungsten carbide or tantalum. The aluminum board with the channels for cooling water is used as the base of the converter ...

We recently developed a parallel algorithm for computing ILU preconditioners, which was presented at

Bidomain simulations of cardiac systems often in volve solving large, sparse, linear systems of the form Ax=b. These simulations are computationally very expensive in terms of run time and memory requirements. Therefore, efficient solvers are essential to keep simulations tractable. In this paper, an efficient preconditioner for the conjugate gradient (CG) method based on system order reduction ...

The coefficient matrices in M3D are reformed here to have symmetric structures. They are further categorized into 3 types: weak diagonally-dominant matrix, moderate diagonally-dominant matrix, and strong diagonally-dominant matrix. The weak diagonally-dominant matrix corresponds to the solution of auxiliary quantity F of the perturbed toroidal flux I~ with Neumann boundary ...

A series of numerical experiments on the Cray XMP/48 and on the Cray 2 investigate the robustness and economy of direct and unsymmetric conjugate gradient (CG) type methods for the solution of matrix systems arising from a three-dimensional FEM discretization of fluid flow problems. Computations on a Boussinesq flow model problem with either ILU ...

Two recently developed methods for the solution of the sparse block-banded linear equation sets generated by fully implicit reservoir simulators are investigated. Nested factorization is a new approach to forming an incomplete factorization of the linear system. Comparisons are made of the nested factorization approach and the incomplete LU factorization (ILU) approach. Tests ...

Given a sparse linear system, A x = b, we can solve the equivalent system P A PT y = P b, x = PT y, where P is a permutation matrix. It has been known that, for example, when P is the RCMK (Reverse Cuthill-Mckee) ordering permutation, the convergence rate of the Krylov subspace method combined with the ILU-type preconditioner is often enhanced, especially if the matrix A is ...

Various incomplete factorization (ILU) methods coupled with ORTHOMIN acceleration are discussed. These include natural, D2 and D4 orderings with several degrees of factorization, the modified factorization (MILU) and the COMBINATIVE method. These techniques can also be used with the bordered systems resulting from fully-coupled, fully-implicit multi-block ...

Destruction of volatile organic compounds in the stream of flue gases from simulated waste combustion process was studied in this work. The simulated off-gas was prepared by combusting Polish light oil with air, and it was irradiated under electron beam (EB) generated from a ILU-6 accelerator. Qualitative and quantitative analyses of organic compounds from ...

In this paper some iterative solution methods of the GMRES type for the discretized Navier-Stokes equations are treated. The discretization combined with a pressure correction scheme leads to two different types of systems of linear equations: the momentum system and the pressure system. These systems may be coupled to one or more transport equations. For ...

During last years the demand for pasteurization and desinsection of various food products (meat, chicken, sea products, vegetables, fruits, etc.) had increased. The treatment of these products in industrial scale requires the usage of powerful electron accelerators with energy 5-10MeV and beam power at least 50kW or more. The report describes the ILU ...

This work is motivated by the lack of fully coupled computational tool that solves successfully the turbulent chemically reacting Navier-Stokes equation, the electron energy conservation equation and the electric current Poisson equation. In the present work, the abovementioned equations are solved in a fully coupled manner using fully implicit parallel GMRES methods. The system of Navier-Stokes ...

Efficient solution of large-scale, ill-conditioned and highly-indefinite algebraic equations often relies on high quality preconditioners together with iterative solvers. Because of their robustness, the factorization-based algorithms could play a significant role when they are combined with iterative methods, particularly in the development of scalable solvers. We present our recent work in using ...

Many interesting areas of current industry work deal with non-linear coupled systems of partial differential equations. We examine iterative methods for the solution of a model two-dimensional coupled system based on a linearized form of the two carrier drift-diffusion equations from semiconductor modeling. Discretizing this model system yields a large non-symmetric indefinite sparse matrix. To ...

ILU preconditioning methods such as PBILU2 [37], the BIS can be constructed in a single processor potential of multigrid method have been developed by a few authors. Several multilevel ILU preconditioners algebraic multigrid methods are proposed in [23, 41, 44]. The parallelization of multilevel ILU

We investigate a new element-by-element multilevel block-ILU preconditioner that combines the advantages of element-by-element (EBE) and incomplete LU-factorization (ILU) preconditioners. The preconditioner is constructed in EBE fashion with high-throughput dense operations. Numerical experiments demonstrate its effectiveness. Speedups as high as five were ...

The authors describe and test spai_1.1, a parallel MPIimplementation of the sparse approximate inverse (SPAI) preconditioner.They show that SPAI can be very effective for solving a set of very largeand difficult problems on a Cray T3E. The results clearly show the valueof SPAI (and approximate inverse methods in general) as the viablealternative to ILU-type methods when facing ...

... zi 4 Linear Acceleration of Impact Type ... (ORGANISATION DU TRAITE DE L'ATLANTIQUE NORD) LINEAR ACCELERATION OF IMPACT TYPE IL ...

... ACCELERATORS, *ION ACCELERATORS, RINGS, VACUUM APPARATUS, ELECTRONS, MAGNETIC FIELDS, CROSSED FIELD DEVICES ...

Fully coupled Newton-Krylov algorithms are used to solve steady speed compressible flow past a backward facing step flow Mach and Reynolds numbers. Various preconditioned Krylov iterative methods are used to solve the linear systems that arise on each Newton step, specifically Lanczos-based and Arnoldi-based algorithms. Several preconditioning strategies are considered to improve the performance ...

... Accession Number : AD0660737. Title : INJECTOR-TYPE ELECTRON ACCELERATOR WITH CONSTANT WAVE PHASE VELOCITY,. ...

The application of ion implantation for alloying offers a unique opportunity to modify the chemical composition, phase constitution, and microstructure of the surface layers of metals. The authors studied ion implantation of nitrogen and carbon into the surface layers of metallic targets. The phase composition of the implanted layers obtained on the Kh18N10T stainless steel, the refractory ...

We recently developed a parallel algorithm for computing ILU preconditioners, which was presented at Super Computing 1999. The algorithm has been shown to be highly scalable, in terms of execution time required for preconditioner factorization and applica...

... control systems and prototyped the approach by porting the ILU ORB from Xerox to the Lynx real-time operating system. They ...

ILU smoothers are good smoothers for linear multigrid methods. A smoother for the incompressible Navier-Stokes equations, called CILU (Collective ILU), is designed, based on r-transformations. Existing ILU decompositions factorize the matrix with real elements. In CILU the elements of the matrix that is factorized are submatrices, ...

We develop in this paper a multilevel block ILU preconditioner for solving sparse nonsymmetric M-matrices, arising from convection-diffusion equations, discretized by finite difference scheme. This preconditioner is based on recursive block ILU factorization, where the Schur complement matrices are successively approached by some sparse matrices satisfying ...

In this paper, numerical methods for solving the transonic full potential equation are developed. The governing equation is discretized by a flux-biasing finite volume method. The resulting non-linear algebraic system is solved by using a continuation method with full Newton iteration. The continuation method is based on solving a highly upstream-weighted discretization and then gradually reducing ...

reasonable amount of time, an accelerated life test at high temperatures is used . This type of accelerated test is based on the observation that ...

The results of accelerated stress testing of four different types of silicon terrestrial solar cells

reasonable amount of time, an accelerated life test at high temperatures is used . This type of accelerated test is based on the observation that ...

... Abstract : Analytical and numerical calculations are presented for a reflexing electron beam type of collective ion accelerator. ...

... Accelerations and Airspeeds of One Type of Twin-Engine Transport Airplane in Commercial Operations Over a Northern Transcontinental Route. ...

to the effect of any type of acceleration on cardiac output; or ... cardiac output or which physiological changes could be caused by. Ox acceleration. ...

To model the geodynamic evolution of plate convergence, subduction and collision and to allow for a connection to various types of observational data, geophysical, geodetical and geological, we developed a 4D (space-time) numerical mantle convection code. The model is based on a spherical 3D Eulerian fem model, with quadratic elements, on top of which we constructed a 3D ...

Last years most of the developed countries are using radiation method based on electron accelerators for sterilization of medical goods as mostly safe and ecologically pure from all known methods. The report describes in details the automated installation for sterilization of single-use syringes working in the city of Izhevsk, Russia. The syringes are irradiated from two sides ...

stripping occurs during acceleration, the Qs are ambiguous ..... acceleration site: low in the corona (Type III bursts, stripping) or ...

The operation and critical parameters of railguns are described. The potential and actual performance with other types of macroparticle accelerators is compared. Their research and industrial applications are discussed. Railgun accelerators have the poten...

The general principle of charged particle acceleration in space and laboratory plasmas is illustrated by a discussion of particular types of acceleration mechanisms which can be classified as either deterministic processes or stochastic processes. Acceler...

The general principle of charged particle acceleration in space and laboratory plasmas is illustrated by a discussion of particular types of acceleration mechanisms which can be classified as either deterministic processes or stochastic processes. Acceler...

A list of particle-accelerator installations, giving location, type, dimensions, particles accelerated, and energy, is presented. (A.C.)

Recapitulation of concepts in accelerator design and discoveries made using certain types of accelerators are qualitatively provided as part of a lecture series. (D.C.W.)

In this paper we give an introductory discussion of high intensity hadron accelerators with special emphasis on the high intensity feature. The topics selected for this discussion are: Types of acclerator - The principal actions of an accelerator are to confine and to accelerate a particle beam. Focusing - This is ...

p-multigrid is a 'multigrid-like' algorithm used to obtain solutions to high-order hp-finite element discretizations. In this method convergence is accelerated by using coarse levels constructed by reducing the order, p, of the approximating polynomial. We have investigated p-multigrid coupled with preconditioned block relaxation schemes to obtain the steady-state solution to ...

Several accelerator designs are discussed in search for a greater than 1 TeV electron accelerator. The types considered are linear accelerators, the inverse Cerenkov accelerators, the wiggler (inverse free electron laser), plasma accelerators, and the grating ...

We give here an ordered list of all types of particle accelerators and exhibit how each type evolves conceptually and/or technologically from the preceding. This is in contrast to the usual �history of particle accelerators" in which unrelated accelerator types are listed ...

Disturbance-mediated accelerated succession in two Michigan forest types This publication is not available online. Please contact a FORT author (see sid...

In linear accelerators the particles are accelerated by either electrostatic fields or oscillating Radio Frequency (RF) fields. Accordingly the linear accelerators are divided in three large groups: electrostatic, induction and RF accelerators. Overview of the different types of ...

In the linear accelerators the particles are accelerated by either electrostatic fields or oscillating radio frequency (RF) fields. Accordingly the linear accelerators are divided by three large groups: electrostatic, induction and RF accelerators. Overview of different types of ...

Reviews the development of accelerators over the past 50 years. Topics include: types of accelerators, including cyclotrons; sociology of accelerators (motivation, financing, construction, and use); impact of war; national laboratories; funding; applications; future projects; foreign projects; and international ...

Some proposed techniques for using laser beams to accelerate charged particles are reviewed. Two specific ideas for 'grating-type' accelerating structures are discussed. Speculations are presented about how a successful laser accelerator could be used in ...

A set of fourteen hydrophone types, some submitted for test by manufacturers and others the property of the Marine Physical Laboratory, were tested for acceleration response. The acceleration was introduced as vertical acceleration along the suspending ca...

Determination of homogeneity ( delta E) of particle beam accelerated in an electrostatic accelerator of Van de Graaff type is described. This value was calculated by measuring yield of gamma -quanta for resonance reactions of (p, gamma ) and (p, alpha gam...

The different accelerator types (linear, circular) and the advantages of using superconductivity in particle accelerator are first reviewed. Characteristics of some large superconducting accelerators (Tevatron, HERA, RHIC, LHC CERN) are presented. The des...

The efficacy of electron beam radiation for the disinfection and reduction of organic load of sewage water was assessed with ILU-6 Accelerator at Radiation Technology Development Division of the Bhabha Atomic Research Centre, Mumbai India. The current problem on environmental health in relation to water pollution insists for the safe disposal of sewage ...

An advanced fixed-grid enthalpy formulation based finite volume numerical method is developed to solve the phase change problems in complicated geometries. The numerical method is based on a general non-orthogonal grid structure and a colocated arrangement of variables. Second order discretizations and interpolations are used. The convergence rate is considerably accelerated ...

This paper compares various types of recirculating accelerators, outlining the advantages and disadvantages of various approaches. The accelerators are characterized according to the types of arcs they use: whether there is a single arc for the entire recirculator or there are multiple arcs, and whether the arc(s) ...

An outline is presented of some of the main elements of an electron accelerator radiological safety program. The discussion includes types of accelerator facilities, types of radiations to be anticipated, activity induced in components, air and water, and...

Structure and kinematics of structural changes in cometary type I tails, noting acceleration of ions

Task, Functional Decline in Mice with Alzheimer's Type Neurodegeneration is Accelerated by Charge. Task Book: Entry Unavailable ...

... Descriptors : *ACCELEROMETERS, MAGNETIC CIRCUITS, MECHANICAL PROPERTIES, ACCELERATION, MASS, FREQUENCY MODULATION ...

Research Foundation (JDRF), and industry. the project promises to be a breakthrough for those with type 1

A parallel ILU preconditioning algorithm for the incompressible Navier-Stokes equations has been designed, implemented and tested. The computational mesh is divided into N subdomains which are processed in parallel in different processors. During ILU factorization, matrices and vectors associated with the nodes on the interface between the subdomains are ...

... 5 Contract Nonr-3707(00) iLU Effect of Impurities on the Electrical Resistivity ... Introduction Observations have been made that the electrical resistivity ...

In this paper, we first study convergence of nonstationary multisplitting methods associated with a multisplitting which is obtained from the ILU factorizations for solving a linear system whose coefficient matrix is a large sparse H-matrix. We next study a parallel implementation of the relaxed nonstationary two-stage multisplitting method (called Algorithm 2 in this paper) ...

225) modification of computer systems or programs, including prototypes, based on and ... 225) not require any special treatment such as dry cleaning, ...

International-Miami, and Kennedy International-New York. ...... this city and this neighborhood regarding common problems . ...

An overview is given of the results obtained in the Plasma Accelerator Experiments in Belgrade, using quasi-stationary high current plasma accelerators constructed within the framework of the Yugoslavia-Belarus Joint Project. So far, the following plasma accelerators have been realized: Magnetoplasma Compressor ...

The historical background of the field of particle accelerators is presented with a description of the conceptual and technical growth of each of the major types. First, the status of high-voltage technology before accelerators were conceived is described. This shows the technical knowledge available to the earliest generation of ...

A nuxnber of characteristics of accelerators relevant to their use as meson factories'' are discussed and a comparison made of various types on the basis of these properties. In addition to the most popular types for this application--the isochronous cyclotron and the linear ...

The physiopathological effects of types of acceleration varying in direction of application, intensity, and duration are discussed. Reasons are given for the selection of a take-off position allowing the astronaut to receive the accelerative force transve...

Several new or upgraded versions of heavy ion accelerators have recently come into service. A review is made of these machines and tentative conclusions are drawn on the merits of the various types.

The types and quantities of wear particles generated during accelerated ball rolling contact fatigue

The disclosure relates to an improved integrating acceleration switch of the type having a mass suspended within a fluid filled chamber, with the motion of the mass initially opposed by a spring and subsequently not so opposed.

The disclosure relates to an improved acceleration switch, of the type having a mass suspended within a chamber, having little fluid damping at low g levels and high fluid damping at high g levels.