58 results about "Logarithmic scale" patented technology

An apparatus, method, system, computer program and product, each capable of displaying one or more categories, with each category including one or more events; selecting one of the categories; generating a timeline for the selected category based on a logarithmic scale; determining a position of each of the events belonging to the selected category on the timeline; and displaying each of the events at the determined position of the timeline. The categories may be displayed in a three-dimensional form.

Disclosed herein is an audio output device including: an equalizer configured to execute frequency characteristic correction processing for an audio signal from an audio source; an output part configured to supply an audio signal processed by the equalizer to a speaker for audio output from the speaker; a signal analyzer configured to analyze a frequency characteristic of an input audio signal to thereby obtain a gain of each of sample points on a frequency axis; and an arithmetic unit configured to control parameters of the equalizer, the arithmetic unit extracting sample points having substantially equal intervals on a logarithmic-scale frequency axis from sample points of which gains have been obtained by the signal analyzer, the arithmetic unit calculating parameters of the equalizer by using differences between gains of the extracted sample points and gains at frequencies corresponding to the extracted sample points on a target frequency characteristic.

An analog variable gain amplifier (VGA) adjusting a signal level of a mobile communication system is provided. More particularly, design of a VGA using an operational transconductance amplifier (OTA) having a wide linear input / output range is disclosed. The VGA includes two double-differential-pair OTAs and feedback resistors. A first differential input of a first double differential pair OTA receives an input signal from the forward stage, and a second differential input is negatively fed back through a differential output and a passive resistor. An input in which a first block of the connection structure and first and second differential inputs of a second double differential pair OTA are connected receives an output signal of the first block stage. The output is negatively fed back in series through a variable resistor whose resistance varies exponentially with an adjustment voltage from outside. According to the VGA, it is possible to provide a characteristic of linear variation of gain on a logarithmic scale with respect to a control voltage with a simple and inexpensive constitution. In addition, the VGA can be designed for a low pass filter having a conventional OTA used for a core circuit, and has a simple circuit structure. Therefore, the VGA is convenient for high integration and low-power design, and thus is appropriate for a terminal chip and so forth.

An audio processing method is disclosed. In the audio processing method, a modified discrete cosine transform (MDCT) algorithm is utilized to transform a present time domain audio signal into a spectrum audio signal. A spreading function (SF) coefficient of each partition domain of the spectrum audio signal is obtained by referencing an SF table. A masking partitioned energy threshold of each partition domain of the spectrum audio signal is calculated utilizing a logarithmic scale. An audio block type of each partition domain and an SMR of the spectrum audio signal are calculated. Subsequently, the spectrum audio signal is compressed into an audio bit stream according to the audio block type of each partition domain and the SMR. In addition, an audio signal processing apparatus is also disclosed in this invention.

A tree-structured index to multidimensional data is created using naturally occurring patterns and clusters within the data which permit efficient search and retrieval strategies in a database of DNA profiles. A search engine utilizes hierarchical decomposition of the database by identifying clusters of similar DNA profiles and maps to parallel computer architecture, allowing scale up past to previously feasible limits. Key benefits of the new method are logarithmic scale up and parallelization. These benefits are achieved by identification and utilization of naturally occurring patterns and clusters within stored data. The patterns and clusters enable the stored data to be partitioned into subsets of roughly equal size. The method can be applied recursively, resulting in a database tree that is balanced, meaning that all paths or branches through the tree have roughly the same length. The method achieves high performance by exploiting the natural structure of the data in a manner that maintains balanced trees. Implementation of the method maps naturally to parallel computer architectures, allowing scale up to very large databases.

Disclosed herein is a porous electrode substrate in which carbon fibers are dispersed in the structure thereof have a fiber diameter of 3-15 micron and a fiber length of 2-30 mm, and are bound to one another by carbonized resin such that, when a pore distribution in the porous electrode is determined with a mercury intrusion porosimeter, such that a pore distribution curve is plotted on a graph having a common logarithmic scale on the horizontal axis, and a 1-100 micron pore diameter range of the pore distribution curve includes 80 or more measurement points at equal intervals along the common logarithmic scale, the pore distribution has a skewness S of -2.0<S<-0.8 and a kurtosis K of 3.5<K<10 in the 1-100 micron pore diameter range.

A method of processing an acoustic input signal into an output signal in a hearing instrument includes converting the acoustic input signal into a converted input signal, and applying a gain to the converted input signal to obtain the output signal. According to the invention, the gain is calculated using a room impulse attenuation value being a measure of a maximum negative slope of the a converted input signal power on a logarithmic scale. The calculation of the gain may include evaluating a signal power development value being a measure of the actual converted input signal power attenuation or signal power increase, evaluating a signal-to-reverberation-noise ratio from the signal power development value and the room impulse attenuation value, and calculating, based on a gain rule, said gain from said signal-to-reverberation-noise ratio.

Methods, systems, and computer program products are described herein for generating proxy reflectivity data associated with lightning activity. A computing device receives data associated with lightning activity for one or more geographical areas. The computing device determines the logarithmic scale of the combined in-cloud and cloud-to-ground flash rate (dBR) for one or more grids of lightning activity based on the received data. The computing device generates proxy reflectivity data based on the dBR of the grids.

Disclosed are a demand forecasting method, a demand forecasting program, and a demand forecasting system that can adequately forecast a demand for a commodity. A management computer calculates a trend function with respect to demand values. The management computer then calculates the ratio of the demand values to a trend curve, and calculates a logarithm of the ratio. Then, the management computer approximates the calculated natural logarithm curve with a periodic model, and converts the logarithmic scale of the acquired periodic model to a normal scale. Demand forecasting is performed using a demand forecasting model acquired by combining a periodic change model of the normal scale with a trend curve (trend function).

A sport game which utilizes a plurality of play articles, at least three stations cum goals or targets, a playground, a game controller device and a display device is disclosed. The game is played by individual participant or participants wherein the rules of the game maintain a familiarity with an ancient puzzle game and is based on a mathematical formula of logarithmic scale where the play articles are moved around the stations by play participants to accrue points or goals and where the devices are incorporated with identification, tracking, data transmission, data processing, determination and data display capabilities to monitor and manage the game. The game provides physical, skill and cerebral challenges and is applicable to a plurality of normal sports wherein goal or target shooting is primal; the game can be played indoors or outdoors, for fun, exercise, training of sport skills, light or serious competition.

The invention particularly discloses an array fiber opto-acoustic bionic ear device and a signal conversion method. The device comprises a sound signal processor, an array data controller, laser modulation drivers, a laser fiber array and fiber collimators, wherein the laser modulation drivers are in charge of converting multiple signals output by the sound signal processor into corresponding optical signals; the sound signal processor is connected with the array data controller; the array data controller respectively controls all electrical signals to be connected with the corresponding laser modulation drivers; the laser modulation drivers are connected with the fiber array; the fiber array is connected with the corresponding fiber collimators; finally, each optical signal is output to irradiate corresponding positions of the auditory nerves of living bodies. Optical signal outputs of all ports of the laser fiber array respectively correspond to audio ranges divided by the logarithmic scale, that is, each fiber signal output corresponds to one corresponding audio range signal.

Radio Frequency (RF) coverage models are visualized by displaying three dimensional unity scaled models of antenna performance in a Geographic Information System (GIS), Traditional logarithmic scaled antenna models are converted to linear models and stored as three dimensional representations which are placed and scaled using a GIS to visualize RF coverage.

The invention relates to a navigation painted abacus, which comprises panels 1, a movable rotary disk 2, a logarithmic calculating disk 3, a movable scale 4 and a logarithmic ratio scale 5, wherein, the panels 1 are divided into an upper layer and a lower layer; the movable rotary disk 2 is a circular disk and fixed between the upper and lower panels 1, and can freely rotate around the center of the circle; the movable rotary disk 2 is engraved with two main index lines 6 which pass through the center of the circle and are perpendicular to each other, and a plurality of auxiliary index lines 7 parallel to the main index lines 6; the disk surface is engraved with a distance / speed circle 8 used for measuring the distance / speed, and the outer ring of the rotary disk is engraved with an azimuth scale line 9 of 0 to 360 degrees. The upper and the lower panels 1 are made of organic glass, lined by copper strips, and fixed by screws; and each corner is subjected to slow round processing. The logarithmic calculating disk 3 consists of an inner disk 10 and an outer disk 11 which have the same circle center, wherein, the inner disk 10 can freely rotate, and the outer disk 11 is a fixing disk. The movable scale 4 is made of copper materials, concentric with the movable rotary disk 2 and fixed on the upper panel 1 by the inside thread screws, and can freely carry out circumferential rotation. The logarithmic ratio scale 5 is a strip-shaped plexiglass ruler, one side of which is engraved with logarithmic scale, and can be used as a logarithmic slide rule by matching with the movable scale (4) on the movable rotary disk (2).