摘要:
Method to bring out a temporal difference between corresponding structures in a reference image R and a floating image F by convolving the reference image R and the floating image F with a window function Hw to generate Rw and Fw, applying a non-rigid transformation resulting in a transformation field g(rR) mapping every location rR to a corresponding location rF in the floating image F and generating a subtraction image by performing subtraction Rw(r)−Fw(g(r)) wherein r represents a voxel (x, y, z) in reference image R.
摘要:
The present invention discloses an ultra-compact optical modulator comprising at least one resonator on a semiconductor chip. The EO modulator modulates incoming light having a certain wavelength range and comprises a waveguide layer accommodating at least one resonator having a periodic complex refraction index distribution structure defining a periodic defect band-edge and a cladding layer; and at least one electrode; the waveguide layer, the cladding layer and the electrode forming a capacitor structure; such that when an external voltage is applied to the capacitor structure the free carrier concentration in the waveguide layer is controlled, enabling a modulation of the resonator's refractive index; wherein the periodic defect band-edge is selected to be within the wavelength range, enabling a slow-light propagation of the incoming light within the waveguide layer.
摘要:
A gray value model is generated encoding photometric knowledge at landmark positions. This step exploits intensity correlation in neighborhoods sampled around landmark positions. A geometric model is generated encoding geometric knowledge between landmarks. This step exploits spatial correlation between landmarks of segmented anatomic entities.
摘要:
The engagement of gearwheels with curvilinear teeth is intended to create small-sized mechanical gears of rotational motion with big gear ratio in one stage. The smaller gearwheel—pinion (16)—has one tooth, having in its face section the shape of circumference (3), eccentrically shifted with respect to the axis OO1 of the gearwheel (16). The curvilinear helical tooth of the gearwheel (16) (helical eccentric) is generated by sequential shifting of the circumference 3 along the axis OO1 and its continuous turning around the axis. The greater gearwheel (17) has helical teeth, generated by turning of the cycloidal curve (5), the teeth are conjugated with the helical surface of the pinion (16). The engagement has a continuous line of contact along the whole length of the tooth, where in each section a circular pin tooth and a cycloid are engaged, having minimum losses for friction. In order to eliminate axial loads, occurring in engagement of helical teeth, the gearwheels (16) and (17) are made herring-bone. The similar eccentrically cycloidal engagement can be implemented by assembled gearwheels. On the basis of the engagement one can design cylindrical gearboxes with parallel shafts, bevel gearboxes with intersecting shafts, and also planetary gears according to David and James schemes, possessing the increased load carrying capacity at smaller overall dimensions.
摘要:
Previously used examination devices and methods mostly operate with reflected visible or UV light to analyze microstructured samples of a wafer (38), for example. The aim of the invention is to increase the possible uses of said devices, i.e. particularly in order to represent structural details, e.g. of wafers that are structured on both sides, which are not visible in VIS or UV because coatings or intermediate materials are not transparent. Said aim is achieved by using IR light as reflected light while creating transillumination (52) which significantly improves contrast in the IR image, among other things, thus allowing the sample to be simultaneously represented in reflected or transmitted IR light and in reflected visible light.
摘要:
The invention is directed to an arrangement for generating EUV radiation based on a hot plasma using liquid emitter material. The object of the invention is to find a novel possibility for generating EUV radiation which allows a continuous supply of liquid, particularly metal, emitter material (2) under a defined high pressure without having to interrupt the continuous supply of emitter material (2) when consumed emitter material (2) must be replenished. According to the invention, this object is met in that the emitter material supply unit (4) has at least a first pressure vessel (44) and a second pressure vessel (44′) between the reservoir vessel (41) and the injection device (5) for generating a high emitter material pressure for the injection unit (5), the pressure vessels (44, 44′) are acted upon by a high-pressure gas system (73) with a gas pressure (74) in the megapascal range, and the emitter material supply unit (4) has means for switching the high-pressure gas system (73) from one pressure vessel (44, 44′) to the other pressure vessel (44, 44′) and for correspondingly alternately switching the injection unit (5) to the constant emitter material pressure of the respective pressure vessel (44, 44′) being pressurized, wherein at least one of the pressure vessels (44, 44′) can be refilled during the continuous operation of droplet generation and plasma generation.
摘要:
A method and system allows for the deployment of security policies into the higher layers of the OSI model. Specifically, it allows for the establishment of security policies at layer 4 and higher, by monitoring authentication flows and using these flows as the basis for establishing security policies which then can be used as a basis for assessing the operation of the network.
摘要:
A method and a calculating circuit for generating an output signal representing an actual amplitude of a received digitized signal having a magnitude of the actual amplitude equal or greater than a value of a saturation level of a dynamic range of a receiver. For the determination of the actual amplitude, firstly, a predetermined time interval is selected. Then, a total number of samples of the received digitized signal within the predetermined time interval is calculated. Further, a number of samples of the received digitized signal within the predetermined time interval with the amplitude equal to the saturation level is calculated. Thereafter, a ratio between the number of the samples with the amplitude value equal to the saturation level and the total number of the samples is calculated. For calculation of the magnitude of the actual amplitude a predetermined relationship between the magnitude of the amplitude and the ratio is applied and the output signal representing the actual amplitude is provided.
摘要:
A device for evaluating defects in the edge area of a wafer (6) is disclosed. The evaluation may also be performed automatically. In particular, the device includes three cameras (25, 26, 27), each provided with an objective (30), wherein a first camera (25) is arranged such that the first camera (25) is opposite to an edge area on the upper surface (6a) of the wafer (6), wherein a second camera (26) is arranged such that the second camera (26) is opposite to a front surface (6b) of the wafer (6), and wherein a third camera (27) is arranged such that the third camera (27) is opposite to an edge area on the lower surface (6c) of the wafer (6).