279 results about "Repetition Time" patented technology

A fitness machine is provided, which includes a base frame having a pair of vertical side members; a track assembly rotatably mounted to the base frame between the vertical side members; a drive assembly for rotating the track assembly relative to the base frame; a bench rest assembly slidably mounted to the track assembly for supporting a user in a supine position; a handle assembly and a footrest assembly fixedly attached to the track assembly; and a control system for directing the drive assembly to alter the angular orientation of the bench rest assembly to vary the resistance experienced by a user during an exercise routine. The operation may be manual, programmable, or adaptive to the user's performance, based on repetition time and / or heart rate.

The present invention provides a digital voice book library system which through Internet provides an customized digital audio version book that can be customized according to a learner's learning language, learning level, learning condition, learning taste or the like by a learner's selecting / varying audio attributes of the audio version book(digital audio file) associated with the equivalent printed script (hardcopy) version book that is owned by the learner or is borrowed from a conventional library or a book rental store. Wherein the audio attribute of said customized digital audio version book can be varied and customized in language, voice, speech speed or playback device at every repetition time according to user's learning language, learning level, learning condition or the like, corresponding to the equivalent script book despite different audio attribute. Using the present invention a learner can repeatedly listen to a same content audio version book without boring, therefore can acquire a good language ability in short time.

A magnetic resonance imaging apparatus includes an acquisition unit, a calculation unit, a recalculation unit, a correction unit and a generating unit. The acquisition unit acquires data from plural slices in an object by rotating a zonary region in frequency space by every repetition time. The calculation unit calculates correction parameters for motion correction. The recalculation unit recalculates at least a part of the correction parameters based on relationship between values of the correction parameters and at least one of real-spatial positions and times at which the data is acquired. The correction unit corrects the data using correction parameters including recalculated correction parameters. The generating unit generates image data based on corrected data.

A power transmitter (501) transfers power to a power receiver (505) using a wireless inductive power signal between inductors of the devices. In the power transmitter (501) a power source (601) provides a power source signal which may have level variations. A power signal generator (603) generates a drive signal from the power source signal by means of a frequency converter (605) which increases the frequency of the drive signal relative to the power source signal. A limiter (607) for restricts the power of the drive signal fed to the inductor (503) to be below a threshold in repeating time intervals. A synchronizer (611) synchronizes the repeating time intervals to the power source signal. In the power receiver(505) a load coupler (1001) decouples the power load (1003) from the inductor (507) during the repeating time intervals and a synchronizer (1005) synchronizes the repeating time intervals of the receiver to the power signal. Communication units (609, 1007) exchange data during the repeating time intervals.

The invention discloses a channel state information (CSI) reporting method and a device thereof. The CSI reporting method comprises the steps of determining a CSI reference resource according to one piece of information selected from the information of a preset number of repetition times, a frequency hopping pattern, downlink control information (DCI) and a random access response (RAR), wherein the CSI reference resource comprises a CSI frequency domain reference resource and a CSI time domain reference resource; and reporting the CSI which corresponds with the preset number of repetition times by the UE. Through the channel state information reporting method and the device thereof, more useful reference information can be supplied for base station scheduling in reporting the CSI by the UE, thereby improving scheduling efficiency of the base station.

In a magnetic resonance tomography apparatus employing a FISP pulse sequence, the pulse sequence is repeated with a repetition time TR with different phase-coding gradient directions and with an alternating operational sign of the flip angle α. The gradient pulse trains are thereby completely balanced. A phase increment ΔΦ=β is generated in addition to the alternating operational sign of the flip angle α between successive excitation pulses, so that the steady state signals for a first and a second spin ensemble optionally have either identical or reversed signal polarities. A first dataset on the basis of identical signal polarities and a second dataset on the basis of reversed signal polarities are obtained by means of the free selection of the mutual signal polarities. A pure image of the first and the second spin ensembles is thus obtained by the addition and / or subtraction of the first and second datasets.

Metal and semiconductor nanoshells, particularly transition metal nanoshells, are fabricated using dendrimer molecules. Metallic colloids, metallic ions or semiconductors are attached to amine groups on the dendrimer surface in stabilized solution for the surface seeding method and the surface seedless method, respectively. Subsequently, the process is repeated with additional metallic ions or semiconductor, a stabilizer, and NaBH4 to increase the wall thickness of the metallic or semiconductor lining on the dendrimer surface. Metallic or semiconductor ions are automatically reduced on the metallic or semiconductor nanoparticles causing the formation of hollow metallic or semiconductor nanoparticles. The void size of the formed hollow nanoparticles depends on the dendrimer generation. The thickness of the metallic or semiconductor thin film around the dendrimer depends on the repetition times and the size of initial metallic or semiconductor seeds.

A 3D model of AC electrical conductivity (at a given frequency) of an anatomic volume can be created by obtaining two MRI images of the anatomic volume, where the two images have different repetition times. Then, for each voxel in the anatomic volume, a ratio IR of the intensity of the corresponding voxels in the two MRI images is calculated. This calculated IR is then mapped into a corresponding voxel of a 3D model of AC electrical conductivity at the given frequency. The given frequency is below 1 MHz (e.g., 200 kHz). In some embodiments, the 3D model of AC electrical conductivity at the given frequency is used to determine the positions for the electrodes in TTFields (Tumor Treating Fields) treatment.

An MRI apparatus having an ability of displaying images of flow in different directions in distinguishable manner. When this MRI apparatus performs multi-slice acquisition with a predetermined repetition time TR by selecting a plurality of slices approximately perpendicular to the flow direction of an object to be examined, it performs a first measurement of exciting the plurality of slices in a first order and a second measurement of exciting the same slices in the opposite order to obtain two kinds of data whose signal intensity differs depending on the flow direction. The two kinds of data obtained by two measurements are subjected to subtraction operation to obtain data with different signs depending on the flow direction. These signs combined with the signal intensity are made into images where flow in opposite directions are distinctively depicted. In the multi-slice acquisition, slices are selected so that adjacent slices partially overlap in the direction of the thickness of the slice. Thereby signals of a static part can be suppressed and contrast of flow images after substraction can be enhanced. EPI method of very short imaging time can be employed for the imaging sequence of MRA according to the present invention.

A cellular phone that provides a display of the minutes used and / or remaining during a current cycle of a category of minutes provided in a calling plan. The display allows the user to immediately know if further use will incur additional fees beyond the monthly base fees. Additionally, A method for monitoring and displaying on a cellular phone the number of minutes used and / or remaining in a cellular phone calling plan. The method comprising the steps of: providing a cellular phone; inputting an initial start time for a repeating time cycle of a calling plan; inputting a time period for the repeating time cycle; providing a designated amount of time for a first category of time in the calling plan for the repeating time cycle; monitoring phone usage of the first category of time; and, displaying an indication of one of an amount of time used of the designated amount of time for the first category of time and an amount of time remaining of the designated amount of time for the first category of time in a current repeating time cycle.

The invention provides an information processing method and a terminal for MTC, a base station and a communication system. The information processing method for MTC comprises determining the length of raw information to be transmitted at an MTC terminal; according to the length of the raw information and the length of a data transmission block carrying the raw information, determining repetition times of the raw information according to a set rule; repeating the raw information according to the repetition times to generate target information; carrying the target information in the data transmission block; and using a physical downlink shared channel to transmit the data transmission block carrying the target information. By means of the information processing method and the terminal for MTC, the base station and the communication system, the error rate of data transmission of MTC terminals located at edges of cells during MTC communication is reduced, performances of MTC terminals located at edges of cells are improved, and the coverage of cells is enlarged.

Application data generated by an ECU is wireless transmitted by a transmission device in a subject vehicle so as to periodically change a communications distance by changing, every transmission timing, at least one of (i) a transmission rate, which is used in transforming a transmission packet into a transmission signal in a modulation section, and (ii) a transmission power, which is configured by an amplification section to amplify the transmission signal. As a result, the data transmission from the subject vehicle can be made (i) in high repetition times with respect to a nearby vehicle having a greater risk of collision (i.e., time to collision being shorter), and (ii) in low repetition times with respect to a distant vehicle having a less risk of collision (i.e., time to collision being longer).

A magnetic resonance imager performing images of a patient imager includes imaging coils. The imager includes receiver coils The imager includes a computer that causes the imaging coils to produce a first steady-state free precession excitation slab with respect to a first position regarding a target of the patient during a first repetition time, and a second steady-state free precession excitation slab with respect to a second position different from the first position regarding the target during a second repetition time; and forming a first 3-D dataset of the target associated with the first excitation slab and a second 3-D image dataset of the target associated with the second excitation slab from information received from the receiver coils. The first 3-D image dataset and the second 3-D image dataset, together defining a series of 3-D image datasets for each repetition time; and producing an image of the target from the series of 3-D image datasets. A method for analyzing a patient. A method to evaluate coronary arteries to assess their degree of stenosis. A computer program which, when executed by a computer of a Magnetic Resonance Imager, forms an image of a patient.

A magnetic resonance imaging apparatus has means for detecting the movement of an object so as to correct the variation of the non-uniformity of static magnetic field because of the movement of the object and thereby to improve the quality of the MR image. When actually measured data is corrected by using a signal for correcting the static magnetic field obtained in a preliminary measurement, the influence of the non-uniformity of static magnetic field is eliminated from the image based on the information from the body movement detecting means by using a correcting signal measured at the same time phase of the periodic movement as that of the actually measured signal. A navigation echo measured during the same repetition time as that of the actually measured signal is used for detection of time phase by detecting means. As a result, the quality of image is not deteriorated by the variation of the non-uniformity of static magnetic field due to the movement of the body of the object, realizing imaging of high quality image.

The invention discloses an identity authentication method and an identity authentication system. The method comprises the following steps of: in the login of a user, receiving a continuous voice signal recorded by the current login user; extracting a voiceprint characteristic sequence from the continuous voice signal; computing likelihood between the voiceprint characteristic sequence and a background model; computing the likelihood between the voiceprint characteristic sequence and a speaker model of the current login user, wherein the speaker model is a polyhybrid Gaussian model constructed according to the repetition times and frame number of the registration voice signals recorded in the login of the current login user; computing a likelihood ratio according to the likelihood between the voiceprint characteristic sequence and the speaker model and the likelihood between the voiceprint characteristic sequence and the background model; and if the likelihood ratio is greater than a preset threshold value, determining the current login user is an effectively authenticated user, otherwise determining the current login user is an unauthenticated user. By the method and the system, the voiceprint-password-based identity authentication accuracy can be improved.

Provided is a system and method for performing a magnetic resonance fingerprinting imaging process. The process includes determining acquisition parameters including at least one of repetition time (TR) or flip angle (FA), selected to control one of a duration and a number of repetitions of for a pulse sequence that samples k-space in a Cartesian acquisition pattern by acquiring an echo train. The process also includes controlling a magnetic resonance imaging (MRI) system to perform the pulse sequence a plurality of times to acquire magnetic resonance fingerprinting (MRF) data corresponding to signals from the subject excited by the pulse sequence. The process also includes estimating quantitative tissue properties of the subject by comparing the MRF data to a database and reconstructing, from the MRF data, at least one image of the subject indicating the estimated quantitative tissue properties.

In a method in the form of a pulse sequence for operating a magnetic resonance tomography apparatus, and in a magnetic resonance tomography apparatus operated according to the method, image data are obtained according to a SSFP or FISP (Fast Image Steady Precession) pulse sequence. After the end of the imaging sequence, a decay radio-frequency pulse having a flip angle of approximately .alpha. / 2 with a phase angle inverted relative to the last excitation pulse of the imaging sequence is emitted wherein .alpha. is the flip angle of the excitation pulses of the imaging sequence. The decay radio-frequency pulse is emitted at an interval T.sub.R / 2 following the last excitation pulse, where T.sub.R is the repetition time of the imaging sequence.

The invention discloses a method and a device for efficient random access of user equipment. The method comprises the steps of selecting the number of random access preamble code repetition times according to a mobility general situation of the user equipment; adopting the last random access preamble code repetition times at which the user equipment successfully accesses to a base station when the mobility general situation of the user equipment indicates that the mobility is low; determining the random access preamble code repetition times according to a latest downlink measurement value and a mapping table when the mobility general situation of the user equipment indicates that the mobility is high; and selecting the random access preamble code repetition times according to an absolute value of the difference between the latest downlink measurement value and the last downlink measurement value at which the user equipment successfully accesses to the base station when the mobility general situation of the user equipment indicates that the mobility is medium. The mobility general situation is determined by a core network according to the number of base stations to which the use equipment is connected within a fixed time period. Therefore, unreasonable selection, which is brought about by a downlink measurement error, of the number of preamble code repetition times is reduced, and the frequency spectrum utilization ratio is improved.

For the purpose of solving the above problems, the present invention includes: transmission / reception means provided in a flow path for performing transmission / reception using a state change of fluid; repetition means for repeating the transmission / reception; time measurement means for measuring a time of propagation repeated by the repetition means; flow rate detection means for detecting a flow rate based on a value of the time measurement means; and number-of-times change means for changing to a predetermined number of repetition times. With such a structure, an influence caused by a variation of a flow can be suppressed pressed by changing the number of repetition times so as to be suitable for a variation. As a result, reliable flow rate measurement with a high accuracy can be achieved.

The invention provides a pulse sorting method based on an isomorphic sequence, and aims to solve the problem in detection of pulse groups which are practically submersed into a large quantity of pulse streams. The method comprises the following steps S1, acquiring a pulse repetition time interval sequence through first-order backward difference of the arrival time sequence of pulse streams, and quantizing the value of each element of the pulse repetition time interval sequence; S2, sieving the repetition substrings of the pulse repetition time interval sequence by using a suffix array and a maximum public prefix; S3, deleting shorter sub-strings from sub-strings having inclusion relations, and combining and jointing sub-strings having overlapping relations; S4, constructing a pulse stream arrival time difference matrix specific to the remaining pulse streams; S5, extracting a positive real number sequence of each line of the difference matrix to construct a pile of arrays, and sequencing the arrays to obtain a plurality of subsets; S6, searching for the sum of the subsets and a maximum common subsequence, and determining the position of a target pulse; S7, performing harmonic wave verification and pulse loss verification.

There is provided a transmitting / receiving method performed by a user equipment (UE) including a dedicated radio frequency (RF) chain for a proximity service (ProSe). The method may comprise: receiving configuration information for a discovery resource pool, the discovery resource pool including a bitmap representing a subframe used for a discovery signal and information representing the number of times when the bitmap is repeated; turning on the dedicated RF chain based on a subframe corresponding to a first bit 1 in a bit string enumerated by the bitmap and the number of repetition times; turning on the dedicated RF chain and thereafter, transmitting / receiving a signal to / from an adjacent UE; and turning off the dedicated RF chain based on a subframe corresponding to a last bit 1 in the bit string.

The invention discloses a communication system and a communication method provided with combined frequency domain repetition and mixed automatic retransmission. At first, one receiving end receives a communication signal, and makes an analysis treatment to the communication signal to obtain a channel quality estimation message and SINR messages of resource blocks that the communication signal corresponds to, then a modulation code format and retransmission times are determined according to the channel quality estimation message and the SINR messages of the resource blocks, finally a sending end makes a corresponding code modulation as well as combined frequency domain repetition and mixture with corresponding times to the communication signal to be transmitted according to the determined modulation code format and retransmission times, then the communication signal is sent. Thus, the transmission time delay of the air interface can be effectively decreased, the repetition times are jointly optimized based on the requirement of the service quality, the frequency domain resource allocation and the time-domain mixed automatic retransmission can be realized, and the packet schedule based on the quality of the channel can also be supported at the same time.

A system and method include a computer readable storage medium having stored thereon a computer program comprising instructions which when executed by a computer cause the computer to apply a first plurality of radio frequency (RF) pulses during a first repetition time (TR) interval of a magnetic resonance (MR) pulse sequence. The instructions also cause the computer to apply a first plurality of gradient pulses and acquire the MR data during application of each gradient pulse of the first plurality of gradient pulses between an adjacent pair of RF pulses of the first plurality of RF pulses. Each gradient pulse of the first plurality of gradient pulses is configured to allow acquisition of MR data for a respective first bladelet passing through a center of k-space, wherein the first bladelets are non-parallel with each other. The instructions also cause the computer to reconstruct the acquired MR data into an image.

In a method and apparatus to determine a predetermined signal amplitude of an examination subject in an MR measurement in which multiple RF pulses are radiated into the examination subject in a pulse sequence in a pulse series with a repetition time TR that is smaller than the T2 times of the examination subject, a target magnetization is established for a predetermined point in time after radiation of the respective RF pulse for essentially all RF pulses from the pulse series, a target flip angle and a target phase are determined for different regions of the examination subject for essentially all RF pulses depending on the respective target magnetization, a respective amplitude and phase response is determined for essentially all RF pulses to generate the respective target magnetization after radiation of the respective RF pulse, and the RF pulses with the respective determined amplitude and phase response are radiated into the examination subject.

The present invention provides a system and method of MR scan prescription to achieve in a fast, simple, and effective manner the optimal peak excitation field strength for a given pulse shape and flip angle such that the minimum TR for the MR scan can be optimized and based on SAR constraints. The present invention provides a technique to obtain optimal B1 parameters for an arbitrary shape and flip angle of an excitation pulse in real-time while satisfying SAR and / or RF hardware limits to determine the minimum achievable repetition time for a pulse sequence. The present invention is particularly applicable with breath-hold and cardiac imaging techniques that are carried out at relatively high field strengths.

For in vivo magnetic resonance imaging at high field (≧3 T) it is essential to consider the homogeneity of the active B1 field (B1+), particularly if surface coils are used for RF transmission. A new method is presented for highly rapid B1+ magnitude mapping. It combines the double angle method with a B1-insensitive magnetization-reset sequence such that the choice of repetition time (TR) is independent of T1 and with a multi-slice segmented (spiral) acquisition to achieve volumetric coverage with adequate spatial resolution in a few seconds.

For the purpose of solving the above problems, the present invention includes: transmission / reception means provided in a flow path for performing transmission / reception using a state change of fluid; repetition means for repeating the transmission / reception; time measurement means for measuring a time of propagation repeated by the repetition means; flow rate detection means for detecting a flow rate based on a value of the time measurement means; and number-of-times change means for changing to a predetermined number of repetition times. With such a structure, an influence caused by a variation of a flow can be suppressed by changing the number of repetition times so as to be suitable for a variation. As a result, reliable flow rate measurement with a high accuracy can be achieved.