摘要:
First and second sets of numbers are received in an input range, which is separated into sub ranges. A first sub range is processed by initializing bits of a memory to a first logical state and by changing the initial state of each of the bits corresponding to a received number of the first set that is within the first sub range. Each number received in the second set is compared to a bit in the memory to identify a set of received numbers that are in the first sub range and that are in both the first set and the second set. The comparing is responsive to detecting a change of initial state of any bit in the memory during the processing of the first sub range. The processing and comparing is repeated for remaining sub ranges to identify received numbers that are in both the sets.
摘要:
The present invention relates to a method and respective system for operating a DRAM main memory. One buffer line is provided for multiple pages. When writing data to the buffer it is decided which to which buffer-line the data is written to based on its destination main memory address. A tuple consisting of lower memory address and data is stored. Data entered into the buffer-line will be sorted by page in case the line is flushed to the main memory. Sorting the buffer entries results in less page openings and closings, since the data is re-arranged by memory address and therefore in logical order. By using one line for multiple pages only a fraction of memory of a common set-associative cache is needed, thus decreasing the amount of overhead significantly.
摘要:
A spectacle lens having in a first see-through region a power suitable for distant viewing in a wearing position, and in a second see-through region a power suitable for medium-distance viewing, i.e. for distances of about 1 meter and more, in a wearing position, and in which the power continuously increases from the first see-through region along a plane or winding principal line to the second see-through region. The spectacle lens has the following features: the power increases not only from the first see-through region to the second see-through region, but also continuously to beyond the second see-through region to a lower edge of the spectacle lens; and a region of clear vision, i.e. a region in which a residual astigmatism of a system spectacle-lens/eye does not exceed 0.5 dpt, narrows below the first see-through region towards the lower edge of the spectacle lens to have a funnel-shaped configuration, i.e. without any constriction.
摘要:
A method for optimizing an atoroidal surface of an optical lens, in particular a spectacle lens, having at least one plane of symmetry is characterized by a combination of the following features: dividing the atoroidal surface having at least one plane of symmetry into at least two regions separated by the at least one plane of symmetry; representing one of the separate regions (represented region) of this surface by a set of coefficients of B spline functions; computing sagittal heights of the represented region by B spline interpolation; computing sagittal heights in at least one other region by mirroring coefficients or coordinates at the at least one plane of symmetry; and optimizing the atoroidal surface only by varying the set of B spline coefficients of the represented region.
摘要:
The invention relates to an optical lens or glass with an identification and/or marking on the front and/or rear surface. The inventive lens or glass with an identification and/or marking on the front and/or back surface is characterized by an identification and/or marking which consists of a plurality of elements, each element causing a spectral dispersion of the incident light and reflected light.
摘要:
A method is described for determining the optical and individual progression length of a continuous vision lens on the basis of the measured cornea/bridge distance of a spectacle frame which is matched in advance.The invention is distinguished by the following steps: a) the value of the individual cornea/bridge distance (HSA) of a spectacle frame which has been matched in advance is obtained, b) the individual distance d between a far reference point BF and a centering cross ZK is measured, and c) the optimum and individual progression length (Lopt) is determined using the following formula; Lopt=0.63*(HSA+13.5 mm)+d(BF, ZK).
摘要:
A spectacle lens comprises a region (distance portion) designed for viewing at greater distances, in particular, to infinity; a region (near portion) designed for viewing at short distances and, in particular, “reading distances”; and a progression zone located between the distance portion and the near portion, in which the power of the spectacle lens increases from a value at the distance reference point located in the distance portion to the value at the near reference point located in the near portion along a line (principal meridian) curving towards the nose. It is one of the characteristics of the invention that for minimizing the change of imaging properties with horizontal movements of the gaze along a curve described by the points of penetration of the principal rays through the front surface, these principal rays passing through a point having the coordinates (x−dx, y, s) at the beginning of the movement and a point having the coordinates (x +dx, y, s) at the end of the movement, at s=−40 mm and dx=10 mm particular conditions apply.
摘要:
A spectacle lens is provided with a region (distance portion) designed for viewing at greater distances and, in particular, “to infinity”, a region (near portion) designed for viewing at short distances and, in particular, “reading distances”, and a progression zone disposed between the distance portion and the near portion, in which the power of the spectacle lens increases from the value in the distance reference point located in the distance portion to the value at the near reference point located in the near portion along a line (principal meridian) curving towards the nose. The invention is marked by specific conditions for the astigmatic deviation and/or the mean “as worn” power being observed.
摘要:
A spectacle lens comprises a region (distance portion) designed for viewing at large distances and in particular “to infinity”; a region (near portion) designed for viewing at short distances and in particular “reading distances”; and a progressive zone disposed between the distance portion and the near portion, in which a power of the spectacle lens increases from a value at a distance reference point located in the distance portion to a value at a near reference point located in the near portion along a curve (principal line) veering towards a nose. The invention is distinct in that, for minimizing a change of binocular imaging properties with horizontal movements of glance, a lift (difference between a maximum and a minimum value occurring during a movement) of binocular imaging properties when a moving object is being followed, is smaller than a physiologically pre-determined limiting amount.