Texture enhancement is extremely important for image analysis. In this paper, a pixel-level texture enhancement method based on heat conduction equation is proposed. Using this texture enhancement ...method can efficiently enhance the hidden texture which would increase matching accuracy. And the existence and uniqueness theorem of corresponding points matching(CPM) are also given, the paper proposes pixel-level texture enhancement method based on heat diffusion principle The experiment shows that when the texture contrast and hidden texture visibility increases, the feature points have no moving by using this proposed method, which can be also an advantage. In addition, the proposed method improves the distinction between local texture, meanwhile, increases the quantity of the corresponding points(CPs) of the matching.
We seek to determine whether cell membranes contain sensors that trigger a downstream response to temperature excursions. To do this, we have developed a novel apparatus for exposing a cell membrane ...to an extremely rapid temperature excursion in the nanosecond range. Cells are plated on a gold surface that is back-heated by a pulsed laser and cooled by conduction of heat into the glass substrate and the liquid medium. Analysis using the heat diffusion equation shows that the greatest temperature rise is localized within a region tens of nanometres thick, suitable for specifically heating a cell membrane without heating the remainder of a cell. We refer to this device as a nanosecond hotplate.
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DOBA, EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, IZUM, KILJ, KISLJ, MFDPS, NLZOH, NUK, OILJ, PILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, SIK, UILJ, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
Temperature excursions of short duration are useful in exploring the effects of stress on biological systems. Stress will affect the conformation of biological molecules such as proteins, which will ...lead to an effect on their function. The feasibility of generating such temperature excursions is demonstrated by solving the heat diffusion equation for an aqueous layer on a silicon wafer. The silicon is rapidly heated by a laser pulse and also acts as a heat sink to quench the temperature rise. An oxide layer was used to limit the maximum temperature attained by the sample. We show that exposures above a 50 degrees C benchmark can be confined to times less than 5 micros.
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DOBA, EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, IZUM, KILJ, KISLJ, MFDPS, NLZOH, NUK, OILJ, PILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, SIK, UILJ, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
A new experimental setup and analysis method for simultaneous determination of the anisotropic thermal conductivities (κ
x
, κ
y
) is proposed for materials with uniaxial anisotropy or a layered ...structure. By applying heat power diagonally through the sample from a heater to a cold finger, temperature differences (Δ
T
x
, Δ
T
y
) along the two directions were monitored. The monitored temperature differences were compared with Δ
T
x
′
and Δ
T
y
′
, which were calculated by solving a two-dimensional heat diffusion equation. Calculations were repeated until Δ
T
x
′
and Δ
T
y
′
agreed with Δ
T
x
and Δ
T
y
, to determine κ
x
and κ
y
. This technique was applied to a carbon-fiber-reinforced plastic (CFRP) from 40 K to 200 K and a satisfactory agreement was achieved with the κ
x
and κ
y
values and those determined from independent measurements of κ
x
and κ
y
.
In this paper, quantitative evalunation method for constitutive law of heat liberation of concrete member using low heat type cement was investigated. Low heat type cement made use of fly-ash cement ...and low-heat portland cement. The experiments of concrete members were determined in summer and winter season. In the range of this study, the following were revealed: 1) The integrated heat liberations of concrete members could be evaluated by difference analytical method using a one dimensional heat diffusion model. 2) The thermal properties of members could be evaluated by solution analytical method. 3) The constitutive laws of heat liberation in summer and winter season for fly-ash cement and low-heat portland cement were proposed.
The extended least-squares parameter estimate for stochastic heat diffusion equations is considered. The unknown parameter is a heat diffusion coefficient which is a function of a spatial variable. ...Almost sure convergence for the estimated parameter is proved. A numerical example is demonstrated for supporting the theoretical results developed here.
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IJS, IMTLJ, KILJ, KISLJ, NUK, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK
This chapter presents borehole heat exchangers (BHEs) into perspective in an overview of their use, followed by a brief discussion of their installation methods. It focuses on the mathematical ...details of the thermal analysis of single BHEs, with no thermal interaction with the ground surface or other boreholes. Analytical solutions of the heat diffusion equation are presented, with applicable boundary conditions to describe the heat transfer in the Earth around a single BHE. Details are presented of the mathematical treatment of the so‐called borehole thermal resistance, which is described as the resistance to heat transfer between the heat carrier fluid and the surrounding Earth. The chapter applies models of radial heat conduction around a vertical borehole. It calculates the steady‐state borehole thermal resistance for various borehole heat exchanger configurations. The chapter analyzes thermal response test data, and applies the so‐called line source solution to determine thermal conductivity of geologic materials, and the borehole thermal resistance.
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