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42 results about "Numeric range" patented technology

Rapid computation of local eye vectors in a fixed point lighting unit

A rapid method for calculating a local eye vector in a fixed point lighting unit. For a given triangle primitive which is to be projected into a given viewport in screen space coordinates, the local eye vector corresponds to a given eye position and a first vertex of the given triangle primitive. (A different local eye vector is calculated for each vertex of the given triangle primitive). The method first comprises generating a view vector matrix which corresponds to the given eye position and corner coordinates of the given viewport, where the corner coordinates are expressed in screen space coordinates. The view vector matrix is usable to map screen space coordinates to an eye vector space which corresponds to the given viewport. The method next includes receiving a first set of coordinates (in screen space) which correspond to the first vertex. The first set of coordinates are then scaled to a numeric range which is representable by the fixed point lighting unit. Next, the first set of coordinates are transformed using the view vector matrix, which produces a non-normalized local eye vector within the eye vector space for the given viewport. The non-normalized local eye vector is normalized to form a normalized local eye vector. The normalized local eye vector is then usable to perform subsequent lighting computations such as computation of specular reflection values for infinite light sources, producing more realistic lighting effects than if an infinite eye vector were used. These more realistic lighting effects do not come at decreased performance, however, as the local eye vector may be calculated rapidly using this method.
Owner:ORACLE INT CORP

Graphics accelerator with shift count generation for handling potential fixed-point numeric overflows

A 3-D graphics accelerator for performing lighting operations using operands within a given fixed point numeric range. The 3-D graphics accelerator includes a first computational unit which is configured to compute a value of an attenuation factor usable for performing said lighting operation for local lights. The attenuation factor is represented in floating point format. The first computational unit is also configured to represent the attenuation factor in an intermediate format including a first intermediate value (a scaled attenuation factor value within the given fixed point numeric range), and a second intermediate value (a shift count usable to convert the scaled attenuation factor value back to the original attenuation factor value). The 3-D graphics accelerator further includes a lighting unit coupled to said first computational unit. The first computational unit is further configured to convey the intermediate representation of the attenuation factor to the lighting unit. The lighting unit performs lighting calculations in fixed point, using operands within the given numeric range (such as the scaled attenuation factors). The lighting unit generates intermediate color values as a result of these lighting calculations. The lighting unit then uses the shift count value to shift the intermediate color values by an appropriate amount, thereby generating a final color value. The lighting unit clamps said final color value to a predetermined maximum color value in response to said final color value exceeding said predetermined maximum color value.
Owner:ORACLE INT CORP

Rapid computation of local eye vectors in a fixed point lighting unit

A rapid method for calculating a local eye vector in a fixed point lighting unit. For a given triangle primitive which is to be projected into a given viewport in screen space coordinates, the local eye vector corresponds to a given eye position and a first vertex of the given triangle primitive. (A different local eye vector is calculated for each vertex of the given triangle primitive). The method first comprises generating a view vector matrix which corresponds to the given eye position and corner coordinates of the given viewport, where the corner coordinates are expressed in screen space coordinates. The view vector matrix is usable to map screen space coordinates to an eye vector space which corresponds to the given viewport. The method next includes receiving a first set of coordinates (in screen space) which correspond to the first vertex. The first set of coordinates are then scaled to a numeric range which is representable by the fixed point lighting unit. Next, the first set of coordinates are transformed using the view vector matrix, which produces a non-normalized local eye vector within the eye vector space for the given viewport. The non-normalized local eye vector is normalized to form a normalized local eye vector. The normalized local eye vector is then usable to perform subsequent lighting computations such as computation of specular reflection values for infinite light sources, producing more realistic lighting effects than if an infinite eye vector were used. These more realistic lighting effects do not come at decreased performance, however, as the local eye vector may be calculated rapidly using this method.
Owner:SUN MICROSYSTEMS INC

Reservoir layer evaluation method by utilizing nuclear magnetic resonance logging interpretation parameters

The invention discloses a reservoir layer evaluation method by utilizing nuclear magnetic resonance logging interpretation parameters, relating to the geology logging interpretation evaluation technology field of petroleum geological exploration; oil saturation So and mobile fluid saturation BVM parameters are chosen, a formula M1=BVM*So is utilized to obtain the M1 parameter which reflects the oil characteristics of the reservoir layer and the total energy; by utilizing the formula SMo=BVM-SMw, the mobile oil saturation SMo parameter is calculated, and then the formula M2=SMO*phi is utilized to obtain the M2 parameter which reflects the recoverable oil volume of the recoverable oil volume, and then the fluid type is determined according to the numeric range of the M1 and M2 values; by adopting the method, different oil grades of the reservoir layer can be effectively and quantitatively divided in a refining way, the undetermined factors of the interpretation parameters caused by block, horizon and oil-containing characteristics are eliminated, and the reservoir layer evaluation method has general applicability to a clastic rock oil-containing bed series.
Owner:CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD

Data processing apparatus, method and computer program product for reducing memory usage of an object oriented program

The present invention provides a method, computer program product and data processing apparatus for reducing memory usage of an object oriented program. The object oriented program comprises at least one class definition used to create objects, each class definition providing at least one function that can be run in respect of objects created from that class definition, and identifying a number of storage items to be provided in memory for each object to store data values associated with that object. For each class definition, the method is performed prior to any objects being created from that class definition, and is performed in respect of at least a subset of the storage items identified by that class definition. The method involves determining an original size associated with each storage item, and analysing at least the class definition to identify any numeric ranges associated with the storage items. For each storage item for which a numeric range is identified, it is determined if the original size can be reduced whilst still supporting the numeric range, and if so a modified size less than the original size is allocated to that storage item. Thereafter, the class definition is altered having regard to any storage element that has been allocated a modified size, whereafter when objects are created from that altered class definition, a significant reduction in memory usage is obtained.
Owner:ARM LTD

Rock core sampling method

The invention relates to a rock core sampling method. The rock core sampling method sequentially comprises the following steps of: weighing and measuring rock cores to be screened; measuring each rock core by using ultrasonic waves with different frequencies, and reading time used by the ultrasonic wave permeating the rock core, head wave amplitude after butt joint of probes and head wave amplitude after the rock core is added; combining an error analysis theory to acquire the numeric range of wave impedance of each rock core; preliminarily screening the rock cores with the intersected wave impedance numeric range under different frequencies; further screening the preliminarily screened rock cores by utilizing sound wave attenuation coefficients; and finally screening the rock cores with the intersected attenuation coefficient numeric range under different frequencies. The rock core sampling method is reliable in principle, simple in structure and convenient in operation. By the method, a large number of rock cores with the same properties for a test can be preferably selected with less time and cost; physical properties, such as mass, density and the like, and internal pore space structures of the rock cores can be quantitatively analyzed; and important significance is achieved in a rock core analyzing test.
Owner:SOUTHWEST PETROLEUM UNIV

Method for large-scale cultivation of Babylonia areolata in mulched shrimp pond

Disclosed is a method for large-scale cultivation of Babylonia areolata in a mulched shrimp pond. According to the characteristics of pond culture, the mulched shrimp pond is selected, a novel substrate is designed, and timely removal of excessively accumulated residual bait and dung of cultured animals and harmful substances in the substrate with low dissolved oxygen are mainly considered. In addition, the technique of regular complete drainage of water and replacement of fresh seawater is adopted according to the characteristic that Babylonia areolata which dwells at the bottom is capable of leaving water temporarily, so that the substrate conditions are changed forcedly, culture waste is cleared, the numeric range of physical and chemical factors of the substrate is updated, and the substrate is guaranteed to meet the requirement of Babylonia areolata on continual growth during cultivation in 8-10 months. The cleanness of the sandy bottom is kept for a long period of time during cultivation of Babylonia areolata using the mulched shrimp pond in 8-10 months, and a fine living environment is provided for bottom-dwelling Babylonia areolata. The method is simple, efficient, highly operable, low-cost and applicable to large-scale cultivation of Babylonia areolata in shrimp ponds.
Owner:ZHANJIANG TENGFEI INDAL

Ga-Bi doped aluminate green phosphor and preparation method thereof

The invention relates to an aluminate green phosphor doped with rare earth elements gallium and bismuth, and a preparation method of the aluminate green phosphor. The aluminate green phosphor is activated by use of Ce<3+>, and the general formula of the aluminate green phosphor is Y3-x-nBinAl5-yGayO12: Ce<3+>x, wherein the numeric range of x is from 0.01 to 0.2, and preferably from 0.06 to 0.08; the numeric range of y is from 0.5 to 4.5, and preferably from 1.0 to 4.5; the numeric range of n is from 0 to 0.006, and preferably from 0.002 to 0.006. The phosphor having the main emission peak in the green position is obtained by doping YAG (Yttrium Aluminum Garnet) phosphor with the element Ga, and the overall luminous efficacy of the phosphor is not reduced; the green phosphor is matched with yellow phosphor and a blue LED (Light Emitting Diode) chip so that a high-brightness white-light LED can be obtained; if the green phosphor is matched with the blue LED chip, green light can be obtained directly; if the green phosphor is matched with the yellow phosphor and the blue LED chip, cold-tone white light can be obtained; the green phosphor also can be matched with red phosphor and the blue LED chip to obtain white light; and besides, trace bismuth element also can be added to the aluminate green phosphor, so that the luminous intensity of the prepared phosphor can be greatly improved.
Owner:徐州泰歆塬光电科技有限公司

Refrigerating and heating type air conditioner and control method thereof

The invention discloses a refrigerating and heating type air conditioner and a control method thereof. The refrigerating and heating type air conditioner comprises a duplex-cylinder compressor, a commutation assembly, an outdoor heat exchanger, an indoor heat exchanger, an air-liquid separator, a control valve and a coolant radiator, wherein the control valve and the coolant radiator are connected in parallel; an air suction port of a first cylinder is communicated with a first liquid storage device, and the numeric range of the exhaust volume ratio of a second cylinder to the first cylinder is 1%-10%; the commutation assembly comprises a first valve port, a second valve port, a third valve port and a fourth valve port, and the fourth valve port is connected with the first liquid storage device; the air-liquid separator comprises an air outlet, a first interface and a second interface, the air outlet is connected with the second cylinder, and a first throttling element with an adjustable opening degree is connected between the first interface and the outdoor heat exchanger in series; a second throttling element with a fixed opening degree is connected between the second interface and the indoor heat exchanger in series. The coolant radiator and the control valve which are in parallel connection are connected between the outdoor heat exchanger and the first throttling element in series. The refrigerating and heating type air conditioner disclosed by the invention can effectively improve the energy efficiency of the air conditioner.
Owner:GD MIDEA AIR-CONDITIONING EQUIP CO LTD +1

Refrigerating and heating type air conditioner and control method thereof

The invention discloses a refrigerating and heating type air conditioner and a control method thereof. The refrigerating and heating type air conditioner comprises a duplex-cylinder compressor, a commutation assembly, an outdoor heat exchanger, an indoor heat exchanger, and an air-liquid separator, wherein the duplex-cylinder compressor comprises a first cylinder, a second cylinder, a first liquid storage device and a second liquid storage device; an air suction port of the first cylinder is communicated with the first liquid storage device, an air suction port of the second cylinder is communicated with the second liquid storage device, and the numeric range of the exhaust volume ratio of the second cylinder to the first cylinder is 1%-10%; the commutation assembly comprises a first valve port, a second valve port, a third valve port and a fourth valve port, and the fourth valve port is connected with the first liquid storage device; the air-liquid separator comprises an air outlet, a first interface and a second interface, the air outlet is connected with the second cylinder, and a first throttling element with an adjustable an opening degree is connected between the first interface and the outdoor heat exchanger in series; a second throttling element with a fixed opening degree is connected between the second interface and the indoor heat exchanger in series. The refrigerating and heating type air conditioner disclosed by the invention can effectively improve the energy efficiency of the air conditioner.
Owner:GD MIDEA AIR-CONDITIONING EQUIP CO LTD +1

Reservoir layer evaluation method by utilizing nuclear magnetic resonance logging interpretation parameters

The invention discloses a reservoir layer evaluation method by utilizing nuclear magnetic resonance logging interpretation parameters, relating to the geology logging interpretation evaluation technology field of petroleum geological exploration; oil saturation So and mobile fluid saturation BVM parameters are chosen, a formula M1=BVM*So is utilized to obtain the M1 parameter which reflects the oil characteristics of the reservoir layer and the total energy; by utilizing the formula SMo=BVM-SMw, the mobile oil saturation SMo parameter is calculated, and then the formula M2=SMO*phi is utilizedto obtain the M2 parameter which reflects the recoverable oil volume of the recoverable oil volume, and then the fluid type is determined according to the numeric range of the M1 and M2 values; by adopting the method, different oil grades of the reservoir layer can be effectively and quantitatively divided in a refining way, the undetermined factors of the interpretation parameters caused by block, horizon and oil-containing characteristics are eliminated, and the reservoir layer evaluation method has general applicability to a clastic rock oil-containing bed series.
Owner:CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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