137 results about "Period duration" patented technology

A control circuit for a switch unit of a clocked power supply circuit, the switch unit being designed to effect input-side excitation of a resonant transformer arrangement, comprises an input for receiving an auxiliary signal from the resonant transformer arrangement. The auxiliary signal exhibits an essentially fixed phase relation to a load alternating current flowing through a resonant circuit of the transformer arrangement. The control circuit further comprises a phase detector designed to detect reference crossing moments when the auxiliary signal crosses a predefined reference value, a driver controllable to switch the switch unit, and a synchronizer designed to synchronize a turn-on of the switch unit by the driver with regard to a phase position with the auxiliary signal so as to achieve a turn-on of the switch unit within a predetermined time interval around a zero crossing of a voltage present across the switch unit, or of a current flowing through the switch unit. The synchronizer is further designed to receive information about the reference crossing moments from the phase detector, and to provide a turn-on signal to the driver with a fixed phase delay at the reference crossing moments, so as to define turn-on moments at which the driver is to turn on the switch unit. The control circuit further comprises a detector designed to determine an amplitude information which depends on an amplitude or a mean value of the auxiliary signal, and a regulator designed to change an operating frequency in dependence on the amplitude information supplied by the detector, and to determine a period duration between turn-off moments at which the driver is to turn off the switch unit as a reciprocal of the operating frequency. An inventive resonance converter enables independent control of frequency and turn-on moments, or duty cycle, and thus enables a particularly efficient operation of the resonance converter, and a particularly precise regulation.

A method of determining and monitoring head polarity of data heads comprises performing a head polarity detection routine. The head polarity detection routine comprises the step of setting a read gate period duration to a first value. The routine also comprises searching for a good address mark signal during a first read gate period with a channel polarity set to a first polarity. The routine further comprises identifying a polarity of a data head based upon the channel polarity when the good address mark is detected.

Data is wirelessly transmitted from a base station, and / or wirelessly received at a plurality of subscriber stations that are at a plurality of distances from the base station using a Time Division Multiple Access (TDMA) frame by transmitting a same amount of data to each of the subscriber stations at a same power level during the TDMA frame while varying at least one other parameter as a function of the distance of the respective subscriber station from the base station. The at least one other parameter may be an amount of error correction coding, a sub-period duration in the TDMA frame, a number of modulation symbols from a set of modulation symbols and / or a number of sub-periods of the TDMA frame.

Variable thoroughfare toll rates are applied in anticipation of an event impacting traffic flow. An event occurrence is identified and determined to cause a change in a normal traffic flow amount on an impacted section of a thoroughfare. A traveler is notified of the impacted section of the thoroughfare in association with an impacted section-choice toll rate, a bypass choice in association with a bypass-choice toll rate, and a future time period duration for an application of the bypass-choice and impacted section-choice rates. A notified traveler is charged a toll for using the thoroughfare as a function of the bypass-choice rate in response to choosing to travel upon the presented bypass choice, or as a function of an impacted section-choice toll rate in response choosing to travel upon the presented impacted section choice.

The present invention relates to methods and apparatuses for detecting sleep apnea by analyzing characteristic physiological oscillations of the heart rate variability (HRV). Starting from recorded ECG data of the patient, for example, as a long-term sequence of the changing RR intervals, the heart rate variability is examined using autocorrelation calculations for the occurrence of rhythmic oscillations of various frequencies. If oscillations typical for apnea occur having very long period durations in the range of 20 to 80 seconds, these are detected as a maximum of the autocorrelation function. If a pathological sleep apnea accordingly exists, individual apnea events may be identified by prompt analysis of short recorded RR sequences, e.g., in the minute interval.

The embodiment of the invention discloses a method for indicating uplink subframes on an unauthorized frequency spectrum. The method comprises the following steps: determining a current indication period and a next indication period according to a preset period duration; obtaining a preset indication position in the current indication period, wherein the indication position is a preset time sequence position for one or more than one downlink subframe; sending indication signals in a downlink subframe corresponding to the indication position when the indication position in the current indication period is reached, and obtaining the time sequence positions of the uplink subframes in a time range of the current indication period or the next indication period according to the indication signals by a terminal which receives the downlink subframes. By adopting the method for indicating the uplink subframes on the unauthorized frequency spectrum, a TDD frame structure is expanded, so that the TDD frame structure is more flexible and can be adapted to more transmission environments; the transmission efficiency is improved.

The present invention relates to a method for data packet transmissions between a source node and a destination node in a network, the method comprising: —the nodes being configured with an initial sleeping time period duration SPinit and an initial wake-up time period duration LPinit, —the source node sending a preamble, segmented in micro-preambles, for indicating the beginning of a transmission, the micro-preambles being separated by listening slots, —the destination node sending, upon receipt of at least one of the micro-preamble, a packet indicating its presence, called “Ready-To-Receive”, or RTR, packet, and—the source node sending, in response to the RTR packet, a data packet intended for the destination node, wherein the step of sending a preamble comprises: —the source node determining, based on SPinit and on LPinit, an optimal size of the micro-preambles that minimizes the overall energy consumption in the network for sending and receiving packets related to this preamble transmission.

The invention discloses a traffic control method based on traffic flow. The traffic control method comprises idle-period traffic control and busy-period traffic control. An idle-period signal lamp time allocation scheme of the idle-period traffic control is a fixed-period control scheme made according to historical traffic data, there is only one idle-period time allocation scheme, and a signal lamp executes the idle-period time allocation scheme at the period of the idle-period traffic control; and the busy-period traffic control is intelligent control, effective regulation can be carried out on red-light signals and green-light signals of a traffic signal lamp according to real-time traffic flow, and the time length of conversion between a red light and a green light accords with traffic flow information at the moment. According to the invention, a margin is added when the time length of the green light is calculated at a signal lamp intelligent control center so that vehicles entering a road in a going-straight traffic period duration can all pass a crossing, the crowded city traffic status can be effectively improved, and traffic accidents are reduced.

An analog, duty cycle replicating frequency converter extracts duty cycle information from an input, pulse width modulated signal and generates an output pulse width modulated signal of the same duty cycle at a different frequency without regard to the frequency of the input signal. It uses bipolar transistor based circuitry, adaptable to an application specific integrated circuit, to derive voltages representing the on-time and period durations of the input signal, convert these voltages to currents representing the logarithms thereof, generate a voltage representing the difference between the currents, exponentially convert the voltage to a current representing the duty cycle and control an oscillator to generate an output pulse width modulated signal at a predetermined frequency with the duty cycle of the input signal.

The invention relates to a design method for left turn non-motor traffic at a continuous flow intersection. The method is aimed at an intersection type which is the continuous flow intersection, the method is used for optimizing design of traffic path space and signal control of left turn non-motor traffic at the continuous flow intersection so as to eliminating conflicts between left turn non-motors and straight moving motor vehicles at a main signal position, and traffic capacity of the motor vehicles is improved on the basis of ensuring the safety of traffic; in an aspect of space design, astraight moving motor vehicle pre-stop line and a left turn non-motor vehicle crossing passageway are set at a pre-signal position of the continuous flow intersection according to the design method,a left turn non-motor vehicle lane is set between a motor vehicle exit lane and a left turn lane, and therefore a left turn non-motor vehicle passage space path is provided; in an aspect of signal control, control of the straight moving motor vehicle is increased at the pre-signal position, and a maximum vehicle throughput is an optimization goal; constraint conditions such as a phase sequence ofa signal phase, period duration, duration of each green light in all flow directions, saturation and the like are taken into consideration; a linear programming model is built for optimization.

A circuit element has an input for receiving an external clock with a clock period duration. A unit is provided to present the circuit element with information representing the clock period duration of the external clock. In addition the circuit element includes a unit for the temporal control of a signal in the circuit element on the basis of information representing the clock period duration.

Single crystal composed of silicon with a section having a diameter that remains constant, are pulled by a method wherein the single crystal is pulled with a predefined pulling rate vp having the units [mm / min]; and the diameter of the single crystal in the section having a diameter that remains constant is regulated to the predefined diameter by regulating the heating power of a first heating source which supplies heat to the single crystal and to a region of the melt that adjoins the single crystal and is arranged above the melt, such that diameter fluctuations are corrected with a period duration T that is not longer than (2·18 mm) / vp.

In a method for detecting an operating parameter of a power tool having an internal combustion engine with a cylinder, a piston delimiting a combustion chamber in the cylinder and driving a crankshaft supported rotatably in a crankcase, an intake supplying combustion air to the combustion chamber, an exhaust removing combustion gases from the combustion chamber, and a signal generator driven in rotation by the crankshaft emitting sequential alternating voltage signals, a period duration of the voltage signal is selected to correspond to the n-th portion of a crankshaft revolution with n greater 2. The n-th portion of the crankshaft revolution provides a crankshaft angle interval. For each crankshaft angle interval at least one information is detected that represents a course plotted against the crankshaft angle. The course is scanned with regard to characteristic features that are correlated with an operating parameter of the power tool.

It is disclosed a method for performing a time measurement on a packet flow transmitted through a communication network. The transmitting node divides the packets into first and second packets transmitted in alternating periods. At each period, transmitting node also marks each packet by setting a feature thereof to a first value indicating that the packet shall undergo time measurement or a second value indicating that the packet shall not undergo time measurement. The transmission times of two packets marked by the first value are reciprocally delayed by a predefined inter-transmission time shorter than a period duration. For each packet marked by the first value, the transmitting node generates a transmission time stamp and the receiving node generates a reception time stamp. Then, after the end of each period, a time measurement is performed based on transmission and reception timestamps of packets marked by the first value transmitted during the preceding period.

System and method to determine the location of a receiver are provided. The received signal is decomposed into signal chunks that are then correlated with the reference signals of the transmitting sources. In some embodiments, the signal chunks may be shorter than the period of the reference signals. For each signal source, a grid of correlation values is constructed containing one column of correlation values for each signal chunk. Each column contains correlation values for several code-phases. Probes are executed in the grid to acquire the location-determining signals. In some embodiments, a probe includes calculating the fourier transform of a row in the grid, yielding correlation values associated with a refined set of frequency values. Potential acquisitions are verified by processing increasing portions of the received signal. Confirmed acquisition may be used to aid further acquisitions. Some embodiments eventually compress the received signal down to a one period duration by means of an ultra-stacking method. Additional verification, comprising multi-peak test and multi-path tests, may be performed on the correlation magnitude curve obtained from the ultra-stacked signal. Finally, refined code-phase values are extracted from these correlation magnitude curves.

A technique for applying time compression to simulate long-term execution of a software application in the short time frames includes providing simulated events to a software application under test and selectively advancing the system clock. The subject system utilizes two utility modules to interact with a software application under testing. The first module, the Event Simulation module, generates a range of predefine events which simulate the nature and frequency of events to which the software application would react. The second module, the Clock Modification module, intercepts the time signal generated by the operating system under which the software application is executing and modifies the clock signal, typically by advancing the time at a rate which is faster than one second per second, i.e., normal time rate. With the subject system, the behavior of an application over a simulated period may be observed in just a fraction of the simulated period duration, e.g. one year of simulated testing performance in five days. For systems or applications where behavior is influenced by the historical pattern of use, the disclosed technique for time compression can identify defects that normally occur only after extended periods of use.

The invention provides an intersection signal parameter optimization and effect evaluation method based on traffic video data, and based on the digitized data recorded by the electronic police system,the theoretical distribution of travel time of the vehicle on the road segment is obtained, and the goal is to achieve the system traffic efficiency and to optimize both the signal period duration and the green signal ratio. The intersection signal parameter optimization and effect evaluation method based on traffic video data can scientifically and reasonably utilize the digital information of the electronic police video system and the like to optimize the signal parameters of the intersection so as to improve the comprehensive traffic capacity at the intersection of the road and achieve thepurposes of traffic safety, smooth and green environmental protection in the range of a single intersection and an intersection group.

The present invention provides a cultivation method for illuminating plants at night or in a lightless environment. For the illumination, the exit light has an emission peak wavelength in the green to red region and flashes with a flashing pattern of prescribed light period duration and dark period duration. For the flashing, the duty cycle given by formula (1) is 50% or less, wherein the formula (1) is duty factor (%)=light period duration / (light period duration + dark period duration) x 100. Also provided is a cultivation method that controls the blooming of short-day plants such as chrysanthemums while providing insect-screening effects such as mothproofing.

In a method of determining air humidity, a capacitive moisture measuring element (2) used in a moisture sensor for calculation operations is modelled by a parallel circuit of an ideal capacitor (C) and an ohmic resistance (Rp). Charging and / or discharging of the capacitive moisture measuring element (2) by way of a first measuring resistor (R1; RA) provides for ascertaining a first time constant or a first period duration of the charging and / or discharging operation, and charging and / or discharging of the moisture measuring element (2) by way of a second measuring resistor (R2; RA / / R) provides for ascertaining a second one. The capacitance (C) of the moisture measuring element (2) is then calculated from the two time constants or the two period durations, a value for the moisture level finally being ascertained from the capacitance. This method achieves a higher level of measuring accuracy on the part of the moisture sensor.

The invention discloses an urban traffic signal optimization method and an urban traffic signal optimization system. The method comprises the following steps of judging whether a current urban fragmented region is reasonable or not according to the signal period duration, the spatial position and the traffic flow of an intersection on a trunk; judging whether an urban fragmented region control strategy is reasonable or not when the current urban fragmented region is judged to be reasonable; if the urban fragmented region control strategy is judged to be reasonable, determining whether an optimized space exists in the coordination of road sections or not; if no optimized space exists in the coordination of road sections, judging whether the intersection needs to be optimized or not; if theintersection needs to be optimized, carrying out the signal control, the traffic organization and the traffic order optimization on the intersection. In this way, the traffic signal optimization is carried out on the whole city level. The traffic jam can be relieved. Meanwhile, the signal optimization can be performed specifically. The optimization efficiency of the optimal technical personnel isimproved, and the ordered development of signal optimization work is guaranteed.

A method is disclosed for operating a coordinate measuring machine (CMM) including a workpiece scanning probe. The method provides two different measurement sampling period durations in the scanning probe: a first shorter sampling duration provides a faster measurement having a first accuracy, a second longer sampling duration provides a slower measurement having a second (better) accuracy. The shorter sampling duration may be repeatedly interleaved or alternated with the longer sampling duration to provide sufficient accuracy and response time for motion control purposes during ongoing operation of the CMM. The longer sampling duration may provide high accuracy probe measurements to combine with position coordinate values from encoders located on motion axes of the CMM (outside the scanning probe) to provide high accuracy workpiece measurements at a desired frequency, or upon demand. A probe measurement timing subsystem may determine initiation times of the first and second sampling durations.

The invention relates to an optical-electronic distance measuring method according to the phase measurement principle by emitting of optical measuring radiation, which is modulated according to the burst modulation principle, having a burst period duration made of an active burst time and a dead time, receiving at least a part of the measuring radiation (23), which is reflected on the measured object, wherein transforming into an input measuring signal (ES) is performed, and determining a distance to the measured object by analyzing a measuring signal (MS, gMS) generated from the input measuring signal (ES).

The embodiment of the invention discloses a data transmission method and device of an internet of things terminal. The method comprises the following steps: generating a transmission start instruction when arriving the preset first period duration; establishing the network connection with an internet of things server at a far-end; transmitting the to-be-transmitted data through the network connection and the internet of things server; and disconnecting the network connection from the internet of things server when arriving the preset second period duration or completely transmitting the to-be-transmitted data. By using the method disclosed by the embodiment of the invention, the operation efficiency and the cruising time of the internet of things terminal can be improved.

The invention discloses a method for culturing loach fries by using loach initial feed biological culture media, and relates to an aquaculture technique. The method adopts the following culture medium ingredients in mass percentage: 0.01 to 0.05 percent of rotifer spawns, 20 to 40 percent of bean pulp, 2 to 6 percent of meat and bone meal, 40 to 60 percent of pulverized fermented straws, 10 to 20 percent of fermented chicken manure and 1 to 1.5 percent of composite mineral salts. According to a preparation method, the raw materials are uniformly mixed and pulverized to powder or granular mixtures to be used. According to requirements, no peculiar smell, no foreign taste, no mildew and no foreign matters are generated, and the water content is lower than 17 percent. The method has the advantages that the feed biological culture media are green, safe and pollution-free, the preparation is simple, and the use is convenient; rotifer cultured by the feed biological culture media is palatable for the loach fries, and the biomass is great, and the peak period duration of the rotifer is long; the feed biological culture media are used, the survival rate of the loach fries is obviously improved, the fry cost is reduced, and the scale production requirement of loaches is met.

The invention relates to a method and an apparatus used for diagnosing the dynamic performance of a waste gas sensor. The invention relates to a method for diagnosing the dynamic performance of a waste gas sensor used as a construction of a two-point type [lambda] detector. The waste gas sensor is disposed in a waste gas channel and is used for adjusting the air fuel ratio of the gas mixture transmitted into the internal combustion engine by a [lambda] regulator; the period duration time of the [lambda] regulator is calculated for diagnosing the dynamic performance of the waste gas sensor. according to the invention, a [lambda] regulator output signal composed of jump portions and slope portions is predefined as a regulating value in [lambda] regulation; and in the diagnosis period, the [lambda] calculation regulation is dependent on the regulator stationary time caused by regulator design and the period duration prolongation determined and corrected there-from. The invention also relates to an apparatus used for implementing the method.

The invention discloses a method for controlling traffic signals under the bi-direction and two-lane road maintenance construction situation. The method comprises the steps of traffic data collecting, whole-red phase duration calculating, period duration calculating, passing phase duration calculating and traffic signal controlling scheme implementing. According to the method, the traffic circulation character under the bi-direction and two-lane road maintenance construction situation is fully taken into consideration, and a signal control scheme is designed according to the bi-direction and two-lane road maintenance construction needs. A most common four-phase signal control scheme is adopted to give wayleave to bi-direction vehicles in sequence according to the signal control method of a city intersection. The method is very suitable for long-time bi-direction and two-lane road maintenance construction, convenient to calculate and actually operate, high in practicality and capable of improving the overall running efficiency of a traffic system under the bi-direction and two-lane road maintenance construction situation, and has very important practical significance.

The embodiment of the invention discloses a data transmitting method and device, and relates to the technical field of network communication. Data are periodically transmitted. The method includes the steps that a data package transmitting interval of an nth period is determined; in the nth period, data packages are transmitted according to the determined data package transmitting interval; the data package transmitting interval of the nth period is determined through the following steps that the total number NumCT of transmitted data packages in an (n-1)th period and the number NumCS of the data packages which are successfully transmitted to a receiving end in the period are counted; whether the total number NumCT and the number NumCS are equal or not is judged; if the total number NumCT and the number NumCS are not equal, the total number NumNT of the data packages to be transmitted in the nth period is estimated according to the total number NumCT and the number NumCS; according to the total number NumNT and preset period duration, the data package transmitting interval of the nth period is calculated. By the adoption of the scheme, when the data are transmitted, the data transmitting speed can be adjusted according to the current network state, and user experience is improved.