نتایج جستجو برای: stopping power
تعداد نتایج: 499755 فیلتر نتایج به سال:
Clinical trial designs often incorporate a sequential stopping rule to serve as a guide in the early termination of a study. When choosing a particular stopping rule, it is most common to examine frequentist operating characteristics such as type I error, statistical power, and precision of confidence intervals (Statist. Med. 2005, in revision). Increasingly, however, clinical trials are design...
The energy deposition of ions in dense plasmas is a key process in inertial confinement fusion that determines the α-particle heating expected to trigger a burn wave in the hydrogen pellet and resulting in high thermonuclear gain. However, measurements of ion stopping in plasmas are scarce and mostly restricted to high ion velocities where theory agrees with the data. Here, we report experiment...
The researchers made significant progress in all of the proposed research areas. The first major task in the proposal involved duality in stochastic control and optimal stopping. In support of this task, the researchers developed new methods for efficiently solving optimal stopping problems of partially observable Markov processes and optimal stopping problems under jump-diffusion processes. Th...
We study the influence of antiprotons and protons traveling through LiF on the band structure of the insulator using the embedded-cluster method. The crystal is represented by Fm − Lin + clusters with up to 19 fluorine ions embedded in a lattice of point charges representing the remainder of the crystal. The minimum excitation energy of LiF perturbed by the anti proton impurity is calculated em...
NIR tomography image reconstruction can be improved by incorporating spectral constraints and prior spatial information. The convergence of scattering power was studied based on the distribution of projection error with different parameters. The reason that scattering properties are harder to recover than chromophore concentrations was discussed. Using “hard prior” spectral reconstruction, the ...
With the increasing development of laser accelerators, the electron energy is already beyond GeV and even higher in near future. Conventional beam dump based on ionization or radiation loss mechanism is cumbersome and costly, also has radiological hazards. We revisit the stopping power of high-energy charged particles in matter and discuss the associated problem of beam dump from the point of v...
In an electron curtain accelerator, when the electron beam passes through the titanium exit window of the accelerator chamber, X-ray photons are produced as a negative by-product of retarding accelerated electrons. Controlling the produced X-ray photons to avoid their detrimental effects or in fact, proper shielding of the accelerator is an important issue that has to be considered in the use o...
-An increasing constraint in implementing algorithms in digital signal processors is low power design. In order to avoid time consuming and uneconomic redesigning it is essential to optimise the sources of power consumption in the earliest possible stage in the IC design cycle. This paper presents CapCount, a novel high-level dynamic power estimation tool, operating as an add-on tool to Synopsy...
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