1106 results about "Density distribution" patented technology

A reduced keyboard apparatus and method for use with small-sized communications and computing devices. Input via the keyboard is performed using fingers or thumbs The keyboard is characterized by having no discrete boundaries between the included character spaces. The direction and the destination area of a keystroke do not have to be accurate and may correspond to a plurality of included character spaces. Each of the possible characters is provided with a probability value, continuously re-defined according to the specific keyboard area activated by the keystroke. The input of a word is defined by a sequence of keystrokes corresponding to the letters of the word. Subsequent to the completion of a keystroke sequence, the apparatus and method determine the identity of the word through a disambiguation process based on area density distribution. The apparatus and method enable fast, natural, and intuitive tapping on small keyboards having character areas much smaller than the user's fingers while at the same time provide highly efficient word determination.

Background images are removed and only the desired payment information is extracted from a grayscale image of a check or similar financial instrument. A density distribution improvement process applied to grayscale raw image data 40 acquired by scanning a check corrects the density distribution of the raw image data 40 to separate the density range of the desired payment information from the density range of the background image. Image sharpening or contrast enhancement can be used as the density distribution improvement method. A threshold level 44 for clearly separating the payment information from the background image is then calculated from the characteristics of the density distribution of the grayscale improved image data 42 acquired by the density distribution improvement process. Histograms of the density distributions are used to determine the characteristics of the density distribution. The improved image data 42 is then converted to binary image data 46 using the threshold level 44. Most of the background image is white and most of the desired payment information is black in the binary image data 46.

A method for geographical surveying includes the steps of determining an observation grid comprising observation points above a solution volume in the ground; making gravitational measurements at the observation points over a survey area; compiling a matrix having elements relating a set of gravitational accelerations and gravity gradient values at the points to the mass values for volume elements in the solution volume; and calculating the three-dimensional density distribution of the volume under the survey area based on the gravitational measurements and the inverse of the matrix. By measuring the magnetic field and gradient at the observation points, the three-dimensional magnetic susceptibility distribution of the volume under the survey area can be determined.

The invention relates to a three-dimensional entity model surface finite element mesh automatic generation method which has the characteristics of good dimension control performance of mesh quality, density and dimension, good convergence in a dividing process, high calculation efficiency, stability and reliability. The method comprises the following steps: (1.1) establishing a three-dimensional geometrical model, reading an STL neutral file of a model surface, and reconstructing a topology relation of triangle patches; (1.2) according to a relation between a triangle patch and an adjacent patch, grouping surface triangle patches, wherein each group of triangle patches is a characteristic face; (1.3) determining boundaries of each characteristic face, and determining characteristic edges on each characteristic face boundary; (1.4) according to mesh density distribution, generating mesh nodes on each characteristic edge, and expressing boundaries of the characteristic face with mesh node rings on the boundaries; (1.5) selecting a cut surface and an optimal dissection surface, and generating mesh nodes on cut lines and dissection lines; (1.6) generating a surface mesh on each characteristic face, and carrying out smoothing process.

The invention relates to a convolutional neural network based crowd density distribution heat map generation method, which comprises the steps of dividing a crowd picture set into a training sample set and a test sample set, performing crowd label image segmentation by using convolutional neural network architecture, and carrying out number regression by using a convolutional neural network; correcting a density map through a multi-scale template operation, generating a crowd density distribution heat map according to the corrected density map and the regression number, and completing crowd density distribution estimation. According to the invention, deep characteristics of an image are extracted by using a powerful learning ability of the full convolutional neural network so as to perform accurate crowd segmentation, and low efficiency and blindness of density calculation of a traditional method for full image characteristics are overcome; a crowd near-far perspective effect is overcome to a certain extent through multi-scale template correction; and mapping is performed in allusion to the estimated number of people, lateral comparison can be performed on heat maps of different cameras, the method is applicable to various crowd scenes, and the crowd density distribution heat map can be acquired in real time.

A process of determining target parameters of an object within a field of detection of an automotive radar system, the process comprising the steps of: (a) establishing a target range from a sequence of ranges; (b) dwelling on the target range for an initial dwell time to obtain sensor data; (c) determining if the sensor data corresponds to the presence of an object or to the absence of an object at the target range based on probability density distributions of an object being present and being absent at the target range, and if such the determination cannot be made, then repeating steps (b)-(c) until the determination can be made; (d) if the sensor data is determined to correspond to the presence of an object in step (c), then dwelling at the target range for an extended dwell time to obtain additional sensor data for determining the target parameters of the object before proceeding to step (e); and (e) establishing the next of the sequence of ranges as the target range before reiterating steps (b)-(e).

A method for determining the flow rates of a fluid comprising a multi-component mixture of a gas and at least one liquid in a pipe, the method comprising the following steps: a) the multi-component mixture flow is conditioned to create a symmetrical annular gas concentration flow condition, b) the density distribution and/or dielectric constant distribution in said symmetrical flow within a cross-section of the pipe is determined, c) a function describing the radial distribution of density and/or radial distribution of dielectric constant is determined, d) the velocity of the multi-component mixture is determined, e) the temperature and pressure are obtained, and, f) based on the knowledge of densities and/or dielectric constants of the components of the fluid mixture, and the result from the above steps a-e, the volume and/or mass flow rates of the gas and liquid components of the fluid mixture are calculated. An apparatus for performing the method is also disclosed.

A method for stabilizing the reconstruction of an imaged volume is presented. The method includes the steps of performing an analysis of the reliability of reconstruction of a radioactive-emission density distribution of the volume from radiation detected over a specified set of views, and defining modifications to the reconstruction process and/or data collection process to improve the reliability of reconstruction, in accordance with the analysis.

A method of defining such a storage format in multiple data storage devices, each data storage device having a plurality of storage media and a plurality of corresponding data transducer heads, each transducer head for recording on and playback of information from a corresponding storage medium in at least one zone, wherein each zone includes a plurality of concentric tracks for recording on and playback of information. The method includes the steps of: selecting a plurality of said data storage devices; for each selected data storage device, measuring a record/playback performance capability of each head at one or more read/write frequencies per zone; based on said performance capability measurements, generating storage density distributions corresponding to at least a number of the heads in said selected data storage devices; selecting a group of read/write frequencies for said multiple data storage devices, two or more frequencies for each zone, based on said storage density distributions; and assigning one of said read/write frequencies to each head based on performance capability of that head.

The invention discloses a method for quantitatively evaluating the uniformity of the cigarette density distribution. The method comprises the following steps: firstly making a cigarette density distribution curve according to the characteristic that the cigarette density is generally distributed in a way that two ends are dense, removing a dense end of a cigarette by utilizing an inflexion method, and then quantitatively evaluating the uniformity of the cigarette density distribution by utilizing a coefficient of variation method. The method is simple and feasible and capable of quantitatively evaluating the uniformity of the cigarette density distribution. By adopting the method, the mass stability of the cigarette after being rolled can be objectively reflected, and reference can be further provided for the improvement and optimized control of the cigarette quality.

The invention discloses an irrigation control method and system based on crop root zone soil moisture and root distribution. The method comprises the steps that parameters are set, soil water content in each soil layer of a root zone is monitored, root zone weighted average soil water content is computed according to relative root length density distribution, a crop water stress index (CWSI) is computed, when the CWSI computed value is larger than a preset CWSI critical value, irrigation is started; theoretical irrigation amount can also be computed according to planned moisture layer soil water content, and when practical irrigation amount reaches the theoretical irrigation amount, irrigation is stopped. According to the irrigation control method and system, the water stress degree of crops can be accurately and conveniently estimated, the fact that the root zone soil moisture distribution conditions and the crop moisture conditions are considered during irrigation is controlled according to the water stress degree, and an effective tool is provided for realizing of the purposes of water saving and production increasing.

Method and structure for hydrogenation of silicon substrates with shaped covers. According to an embodiment, the present invention provides a method for fabricating a photovoltaic material. The method includes providing a semiconductor substrate. The method also includes forming a crystalline material characterized by a plurality of worm hole structures therein overlying the semiconductor substrate. The worm hole structures are characterized by a density distribution from a surface region of the crystalline material to a defined depth within a z-direction of the surface region to form a thickness of material to be detached. The method further includes providing a glue layer overlying a surface region of the crystalline material. The method includes joining the surface region of the crystalline material via the glue layer to a support substrate.

The invention belongs to the field of related technologies of structure optimizing design and discloses a topological optimization design method of a self-supporting network structure suitable for additive manufacturing. The method comprises following steps: (1), density distribution of different levels of solid materials in a range of [0,1] is acquired by an SIMP (solid isotropic material with penalization) design-rigidity interpolation model, and a macroscopic material layout form and a macroscopic displacement field are obtained simultaneously; (2), an optimization model based on a level set parameterization method is constructed, and on the basis of macroscopic material layout optimization, topological optimization of microstructural configuration is performed on different intermediate density units and an optimal mesoscopic microstructural configuration is output. According to the method, a supporting structure is combined with the designed structure, the macroscopic material layout optimization and microscomic microstructure topological optimization are integrated, so that addition of the supporting structure to additive manufacturing molding is avoided, consumable items are saved, the cost is reduced, the flexibility is higher, and the structure surface quality is protected.

The invention provides a magnetic field modulating type concentric magnetic gear transmission device in a Halbach magnet structure, which comprises a shell, an outer rotor and an inner rotor, whereinthe outer rotor and the inner rotor are installed in an inner cavity of the shell and are in a cantilever type; the inner rotor comprises an inner rotor iron core and a permanent magnet, which are installed on an output shaft of the inner rotor; the outer rotor comprises an outer rotor iron core and a permanent magnet, which are installed on an output shaft of the outer rotor; a magnetic modulation ring is arranged between the permanent magnet of the inner rotor and the permanent magnet of the outer rotor; and the magnetic modulation ring comprises an iron core block and is fixed on an end plate of the shell. The magnetic gear transmission device comprises two layers of air gaps, wherein an inner-layer air gap is formed between the inner rotor and the magnetic modulation ring, and an outer-layer air gap is formed between the outer rotor and the magnetic modulation ring. The magnet structure uses a Halbach array to replace the conventional radial structure, thereby improving the magnetic density distribution of the air gaps of the magnetic gear transmission device. Because the magnetic density of the air gaps approaches to sinusoidal distribution, the detent torque of the magnetic gear transmission device in the structure is greatly reduced, thereby decreasing the vibration and noise of the magnetic gear transmission device and improving the running efficiency.

A diameter and density distribution analyzer of scanning nozzle atomizing fog drop is used in measuring instrument technical field, comprising programmable guide rail support, two microadjustment bearer, particle diameter and density optical sensor, A/D converter and computer. The particle diameter and density optical sensor is of isolating construction and consisted of transmitting terminal and receiving end which are installed on microadjustment bearer fixed on programmable guide rail support, electro optical signal 10 collected by transmitting terminal and receiving end is transferred to receiving end of A/D converter from which digital signal is transferred to computer. The invention is mainly used in atomizing field research of various nozzles, without special requirement to work medium of atomizing field, and it can even be used to measure special distribution of solid state particle diameter and density in jet stream with gas and solid two states, its has large sampling area, small measurement error of density, its measuring course is easy to be automation and experimental measurement period is short.

The invention belongs to the technical field of data processing, and provides a method and a system for statistics and process of tourist density distribution. Scenic spots and the tourist density distribution in a scenic spot are counted automatically by obtaining flow time, view and admire time, view and admire position and state information of tourists in the scenic spot are obtained. Circulating speed and direction of visit of the tourists are predicted through a density distribution prediction model so as to provide scientific basis for the scenic spots or visiting sequence of the tourists, and bad playing quality of the tourists caused by crowd is avoided. Tourism resources can be distributed reasonably through real-time distribution of tourist density and split-flow and guidance with proper measures, the tourist environment is further protected, damages of tourist activities to the environment and facilities are reduced, management ability of the scenic spots is enhanced, the product quality safety level of tourism products is improved, sound development of tourism industry is promoted, and the method and the system have great significance on personalized service of the scenic spots.