255 results about "Energy variation" patented technology

A device for varying the energy of a particle beam extracted from a fixed-energy particle accelerator includes a block of energy degrading material positioned in the path of the particle beam. The block of energy degrading material is preferably in the form of a ring arranged on a wheel. The ring is of a staircase configuration, having discrete steps defining a thickness between parallel entry and exit faces. According to one aspect of the invention, the block is configured so that the particle beam energy variation reaches a maximum at the edges of each step. This upper limit is also the lower limit of the next step. Thus, continuous energy variation is possible despite the fact that the thickness of the block varies in discrete steps.

A speech recognition method, medium, and system. The method includes detecting an energy change of each frame making up signals including speech and non-speech signals, and identifying a speech segment corresponding to frames that include only speech signals from among the frames based inclusive of the detected energy change.

The present invention relates to a detector for measuring characteristics of an energetic particle beam generated by a radiation source, the detector including means to vary the incoming particle beam energy; a plurality of sensors arranged in parallel; and processing means capable of processing signals coming from said sensors in correlation with said energy variation.

The present invention provides the laser irradiation apparatus that has a galvanometer mirror and an f-theta lens optical system, can offset the change of the energy due to the transmittance change of the f-theta lens, and can scan a laser beam while the change of the energy on a substrate is suppressed. Further, the laser beam energy that is incident on the lens is controlled in advance by combining the optical system changing the branching ratio of polarization of the laser beam and the optical system having dependence on direction of polarization of the laser beam and changed continuously according to the transmittance of the lens on which the laser beam is incident. The laser energy is controlled to offset the transmittance of the lens, and thereby energy fluctuation of the laser beam irradiation of a substrate can be prevented.

A laser beam is concentrated using an objective lens and radiated on a amorphous silicon film or polycrystalline silicon film having a grain size of one micron or less, the laser beam being processed from a continuous wave laser beam (1) to be pulsed using an EO modulator and to have arbitrary temporal energy change while pulsing ; (2) to have an arbitrary spatial energy distribution using a beam-homogenizer, filter having an arbitrary transmittance distribution, and rectangular slit; and (3) to eliminate coherency thereof using a high-speed rotating diffuser. In this manner, it is possible to realize a liquid crystal display device in which a driving circuit comprising a polycrystalline silicon film having substantially the same properties as a single crystal is incorporated in a TFT panel device.

Plasma deposition apparatus (1) and method that allows metal or nonmetal vapor (6) to be generated by electron-beam evaporation, guides that vapor using a noble gas stream (containing reactive gases in cases of reactive evaporation), ionizes the dense directed gas and vapor stream at working pressures above about 0.0001 mbar using a hollow cathode plasma arc discharge (11), and conveys the ionized vapor and/or gas stream towards the substrate (4) for impact on the surface at energies varying from thermal levels (as low as about 0.05 eV) up to about 300 eV.

The invention discloses a method for testing net energy of an electrical vehicle power battery, which comprises the following steps of: charging a battery set in a state of discharging stop voltage to the state of charging stop voltage, recording the charged energy, discharging the battery set to a pre-set SOC by the stated current, recording the energy discharged at the first time, and then performing a working situation circulation test to the electrical vehicle, discharging the battery set to the discharging stop voltage by the stated current when the test is finished, recording the energy discharged at the second time, obtaining the energy change amount of the battery in the working situation circulation test according to the average charging and discharging efficiency of the battery set, correcting the energy change amount of the battery in the working situation circulation test according to the battery charging and discharging energy efficiency models, and obtaining the energy actually stored by the battery in the working situation circulation process, namely the battery net energy. The method considers the effect to battery net energy of charging and discharging efficiencies on one hand with high testing accuracy, and only tests the charging and discharging energies of the electrical vehicle before and after the test on the other hand, which is easy to be realized.

The transmissivity of an ftheta lens which is used as a means for converging laser light differs in the center and in the edge thereof. As a result, when the ftheta lens is used as it is with the purpose of crystallizing by laser irradiation, energy distribution of the laser light which is irradiated on the semiconductor film is not uniform so that the whole surface of the semiconductor film could not be irradiated uniformly. Therefore, the present invention provides a laser irradiation apparatus including a galvanometer mirror and an ftheta lens that can offset the change of the energy due to the change of transmissivity of the ftheta lens and can scan the laser light while controlling the change of the energy on the object to be irradiated. Moreover, the invention provides a manufacturing method of a semiconductor device including the laser irradiation apparatus described above.

A system and method for detecting turbulence includes several mobile platforms, a mobile platform velocity sensor, and several electromagnetic energy transmitters and receivers. The receivers receive the energy transmitted by the transmitter(s) after it has traveled along a path subject to the turbulence. The receivers detect alterations of the energy caused by the turbulence and filter the alterations for effects of the mobile platform velocity (on which either a transmitter or receiver is located). Additionally, the system may create a three-dimensional model of the. In another preferred embodiment, the present invention provides a method of detecting turbulence using a mobile platform. The method includes receiving electromagnetic energy that has traveled along a path subject to the turbulence and determining the alteration to the energy caused by the turbulence. The alterations are filtered of the effects of the velocity of the mobile platform on which the receivers are preferably located.

The invention discloses an extraction method for brain-computer interface system imagination action EEG signal features, in particular to an EEG feature extraction method based on a wavelet transform and a BP neural network. The invention takes the energy change caused by imagination action thinking to be a feature distinguishing the imagination movements of a left hand and a right hand, respectively calculates the point-to-point average power of the entire samplings of the EEG signal obtained from C3 and C4 channels by the left hand and the right hand through the imagination (thereinafter called as C3 and C4 of the left hand and the right hand) within 0 to 9s according to the average power formula. A time window is arranged, a discrete dyadic wavelet transform is made to the data of a section provided with the window, an approximation signal a6 on a sixth size is selected to be taken as a signal feature; a BP neural network is used as a classifier to classify. The method of the invention adopting the wavelet transform and the BP neural network to extract the potential of the imagination movement helps to improve the signal/noise ratio and the identification correction rate of the potential of the imagination action; in addition, the wavelet transform is a linear transform, has a quick calculation speed, and is suitable for on-line analysis.

A method of transceiving an audio signal is disclosed. An input audio signal is provided. It is determined whether an energy attack signal exists within the input audio signal and a decision flag is set if the energy attack signal exists. A temporal location of the energy attack point in the input audio signal is detected. Energy variations before and after the temporal location of an energy attack point are determined. The energy variations to produce quantized energy variations and a peak area energy of the input audio signal to produce a quantized peak area energy are quantized. The decision flag, the temporal location of the energy attack point, the quantized energy variations, and the quantized peak energy are transmitted.

The invention relates to an abrasive flow machining numerical simulation research method based on molecular dynamics. According to the method, numerical simulation researches are carried out on a machining course by taking a single abrasive grain as a tool. Specifically, the method comprises the following steps: (1) carrying out abrasive flow machining course simulation researches on the basis of molecular dynamics; (2) establishing an abrasive micro-cutting molecular dynamic model; (3) discussing the influence of related parameters on energy change in the machining course and analyzing the quality of a machined surface; and (4) exploring the influence of abrasive machining on an abrasive crystal structure at a micro-scale. According to the method disclosed by the invention, by researching and analyzing a single-abrasive micro-cutting process in the abrasive flow machining course by virtue of a molecular dynamics method, atomic displacement in a Newtonian layer of a workpiece during the abrasive micro-cutting process can be calibrated; and the method can be used for achieving molecular dynamic simulation of abrasive grains and pointing out that bond angle of an abrasive grain can be changed in the course of machining the abrasive grains, so as to lay a theoretical foundation for the subsequent researches on the deformation of the abrasive crystal structure in the abrasive flow machining course.

Implementations and applications are disclosed for detection of a transition in a voice activity state of an audio signal, based on a change in energy that is consistent in time across a range of frequencies of the signal.

The invention is directed to an arrangement for monitoring the energy radiated by an EUV radiation source with respect to energy variations acting in an illumination beam path, wherein the radiation source has a plasma column emitting extreme ultraviolet radiation. The arrangement includes an energy monitoring unit, and a detection beam path. The detection beam path is separate from the illumination beam path and is arranged with the energy monitoring unit for detecting pulse energy, so that the illumination beam path is not impaired by the energy measurement. The detection beam path is matched to the illumination beam path with respect to bundle extension and optical losses.

The invention discloses a non-destructive testing systems and a non-destructive testing method used for detecting a metal-rope-containing detection target through X-ray detection. The system comprises: an ultrahigh-voltage generator, an X-ray generator, a cesium iodide sensor, an optical fiber module, a controlling module, a computer, and a power supply module. The method comprises the steps that: one-dimensional energy variation data is recorded; a two-dimensional image is spliced; the image is transferred into a GPU; dark current is eliminated; gain adjustment is carried out; metal region segmentation is carried out; defect detection is carried out; the result is transferred to a computer internal memory; feature extraction is carried out; mode recognition is carried out; and the result is outputted. According to the invention, through X-ray processing, GPU calculating, and image processing algorithms, defects such as low detection precision, long feedback cycle, offline spot-check, low efficiency, and the like of other methods are solved. The system and the method provided by the invention can satisfy requirements of various terminal users such as belt manufacturers, mines, ports, power plants, steel plants, cement plants, and the like.

The invention belongs to the technical field of terahertz wave imaging, and provides a terahertz wave imaging device. The device comprises a sample stage for supporting samples needing to be detected, a terahertz wave radiation source, a lens for focusing terahertz lights to a focal point, a first off axis paraboloidal mirror for transforming terahertz lights into parallel terahertz lights, a reflector for reflecting parallel terahertz lights, a second off axis paraboloidal mirror for focusing reflected parallel terahertz lights to a sample needing to be detected, a chopper for carrying out a chopping modulation process on terahertz lights, a detector for inducting energy changes of all detecting points of terahertz lights and then producing corresponding electrical signals of the detecting points, a signal processing unit for amplifying electrical signals of detecting points to carry out analogue-to-digital conversion processing to produce multiple resulting values, and a display terminus for carrying out imaging and display processes on samples needing to be detected through scanning and imaging software. The terahertz wave imaging device can realize a long-distance detection and is suitable especially for the situation that a suspicious object is carried out a safety inspection.

A method for measuring a resistivity of a subsurface formation that includes transmitting continuously a signal at a first fundamental frequency at full power for a first period of time within a single window of time causing electromagnetic energy to propagate in the subsurface formations, transmitting continuously the signal at a second fundamental frequency at full power for a second period of time within the single window of time causing electromagnetic energy to propagate in the subsurface formations, measuring variations in the electromagnetic energy propagated through the subsurface formations at receivers at the first and the second fundamental frequencies, and determining the resistivity of the subsurface formations using the measurements of the variations in electromagnetic energy at the receivers.

The invention aims at providing a structural vibration analysis method based on a finite element method and a generalized Fourier series method, which comprises the following steps of: dividing a structure region to be subjected to vibration analysis to respectively and correspondingly form a finite element expression region and a generalized Fourier series expression region; dividing the finite element grids of the finite element expression region to form a corresponding quality stiffness matrix, and selecting a corresponding assumption displacement form according to the characteristics of the generalized Fourier series expression region to form a quality stiffness matrix; subsequently, establishing a virtual spring between the two regions, and converting the potential energy of the virtual spring into an overall coupling stiffness matrix by using an energy variation method; then, arranging the formed quality stiffness matrices according to displacement to form an overall structure quality stiffness matrix; and solving linear equations to obtain an unknown coefficient in corresponding node displacement and series expansion. When applied to a large complex structure, the method not only can obtain precision higher than the finite element method, but also can save a large amount of calculation cost.