266 results about "Period length" patented technology

A method for manufacturing bone milling cutters, wherein a milling cutter toothing (12) is created at a distal face of a tubular milling cutter shaft (10) of a bone milling cutter at a given outer diameter (D) of the milling cutter shaft (10). The following steps are carried out: determining the tube circumference (U) of the milling cutter shaft (10); ascertaining an average desired tooth height (Hgew) of the milling cutter toothing (12); ascertaining the desired tooth period length (LZ′) of the milling cutter toothing from the desired tooth height (Hgew) at given parameters of a tooth period pattern; dividing the tube circumference (U) by the desired tooth period length (LZ); rounding the results to an even number value (Qz); and dividing the tube circumference (U) by the value (Qz) in order to obtain the tooth period length (LZ).

Apparata, articles and methods for discovering partially periodic temporal associations, referred to herein as p-patterns, are provided. For example, a p-pattern in computer networks might comprise five repetitions every 30 seconds of a port-down event followed by a port-up event, which in turn is followed by a random gap until the next five repetitions of these events. In one embodiment, the present invention comprises: (i) a normalization step to convert application-oriented event data into an application-independent normalized table; (ii) an algorithm for finding significant period lengths from normalized events (e.g., 30 seconds) using a Chi-squared test; and (iii) an algorithm for finding a partially periodic temporal association (e.g., port-down followed by port-up) given a known period.

A device and a method for wavefront measurement of an optical system (7), in particular by an interferometric measurement technique. A dynamic range correction element (12, 12a) is arranged in the beam path upstream of the detector arrangement (11) and is designed such that the variation in the spatially dependent characteristic of a phase of the wavefront forming the interference pattern is kept below a prescribed limit value throughout a detection area. In addition or as an alternative, a set of several diffraction structures of different period length can be used with a shearing interferometry technique and/or a set of several pairs of a reference pinhole and a signal passage opening with different hole spacings can be used with a point diffraction interferometry technique for different sub-areas of the detection area. A remaining distortion error can be taken into account by determining a corresponding distortion transformation and applying the inverse distortion transformation.

The invention discloses a synchronization method of femtocell and macrocell. The method comprises the following steps: determining the propagation time delay TAB between femtocell and macrocell; calculating the difference of the guard period length of macrocell and the twice of the TAB, using the difference value as the guard period length of femtocell; and determining the TS0 initial position offemtocell to be the initial position postponement TAB relatively to the TS0 of macrocell, wherein a time slot which is the twice of TAB is between the uplink time slot and downlink time slot of femtocell. The invention also discloses an access method of the user equipment (UE). By using the synchronization method and access method of the invention, when the proportions of the uplink time slots and downlink time slots of femtocell and macrocell are the same respectively, the interference of cross slots can be avoided and the normal access of UE can be ensured.

A pixel is divided into m (m is an integer of m≧2) sub-pixels, and an area ratio of an s-th (s is an integer of 1 to m) sub-pixel is to be 2^s−1. Also, k (k is an integer of k≧2) sub-frame groups including a plurality of sub-frames are provided in one frame, along with dividing one frame into n (n is an integer of n≧2) sub-frames, so that a ratio of a lighting period length of a t-th (t is an integer of 1 to n) sub-frame is 2^(t−1)m. Further, each of the n sub-frames is divided into k sub-frames each having a lighting period length that is about 1/k of each of the n sub-frames, and one of these is provided in each of the k sub-frame groups.

Disclosed herein is a lighting period setting method for a display panel which permits control of the peak luminance level by controlling the total lighting period length which is the sum of all lighting periods per field period, the lighting period setting method including the steps of, calculating the average luminance level across the screen based on input image data, determining light emission mode based on the calculated average luminance level, and setting the number, arrangement and lengths of lighting periods per field period according to the setting conditions defined for the determined light emission mode so as to provide the peak luminance level which is set according to the input image data.

An illumination apparatus includes light sources differing from one another in terms of light-emission color and voltage drop when identical current flows therein, switches in one-to-one correspondence with the light sources, a DC power supply circuit, and a control circuit. The control circuit performs a first control of the switches through a time division control method such that an on-period of each switch is not overlapped with that of any other switch. The control circuit also performs a second control to individually control at least one of a target current magnitude, flowing through each switch in the switched-on state, and a target on-period length of each switch, and to adjust a ratio of the plurality of light sources in terms of a product of the target current magnitude and the target on-period length.

The invention discloses a method and device for adjusting lanes and signal lamp periods based on vehicle queue lengths. The method comprises the following steps that a video detecting device detects the instantaneous vehicle queue lengths of respective lanes; an analyzing unit calculates the average queue lengths of respective lanes with different lane attributes within set time; the analyzing unit calculates a ratio of the average queue lengths of respective lanes with different lane attributes; and a control unit adjusts a corresponding lane attribute or the corresponding period length of a corresponding signal lamp according to the ratio of the average queue lengths of respective lanes with different lane attributes. The method and device for adjusting lanes and signal lamp periods based on the vehicle queue lengths improve the passing efficiency of an intersection by means of the variable lanes and the variable signal lamp phase periods.

The invention discloses an economic dispatch method for a micro grid based on a centralized and distributed double-layer optimization strategy. The method is an optimized dispatching method using economical efficiency as an objective under the running state of a single micro grid. The method comprises the following steps: in the centralized-distributed double-layer optimization, a centralized layer corresponds to an advanced optimization process within a predicted period, which is performed based on predicted data of the output power and the load of each uncontrollable unit in the micro grid, and the process of the method is completed by a centralized control center of the micro grid; the distributed optimization corresponds to a real-time optimization process performed based on real-time data of the output power and the micro grid load of each uncontrollable unit of the micro grid at each dispatch time in a predicted period length, and the optimization process is performed in a distributed manner and is completed by a micro power supply controller which is built in each unit of the micro grid. The economic dispatch method disclosed by the invention puts forwards that the economical efficiency of energy storage is not considered, namely the energy storage does not participate in the optimization process of the economical efficiency.

A diffractive security element (2) is divided into surface portions, having an optically effective structure (9) at interfaces embedded between two layers of a layer composite (1) of plastic material. At least the base layer (4), which is to be illuminated, of the layer composite (1) is transparent. The optically effective structure (9) as a base structure has a zero order diffraction grating with a period length of at most 500 nm. In at least one of the surface portions an integrated optical waveguide (5) with a layer thickness (s) of a transparent dielectric is embedded between the base layer (4) and an adhesive layer (7) of the layer composite (1) and/or a protective layer (6) of the layer composite (1), wherein the profile depth of the optically effective structure (9) is in a predetermined relationship with the layer thickness (s). Upon illumination with white incident light (13) the security element (2) produces light (14) which is diffracted in the zero diffraction order, of high intensity and with an intensive color.

The present invention discloses a crop irrigation water requirement calculation method on future climatic conditions. The method comprises the steps of collecting the future climatic mode data, and correcting the future climatic mode data based on the historical actually measured meteorological data to enable the future climatic mode data to be suitable for the climatic change influence evaluation of a region or station scale; according to the growth period data of a crop field test and an accumulated temperature formula, constructing a response model of the crop planting date and the crop growth period length to the temperature; utilizing a penman formula to combine a single crop coefficient method and a soil moisture stress coefficient to calculate the crop daily water requirement; based on a crop irrigation system and a water balance principle to calculate the crop daily irrigation water requirement. Aiming at the influence of the climatic change on the agricultural water resource security, the method of the present invention considers the change of the crop planting date and the growth period caused by the global warming, so that a water resource planning management department can forecast the regional future agricultural water resource utilization amount more accurately, and accordingly, a water resource planning scheme is proposed more reasonably.

The invention discloses a data-driven traffic network distributed region control method, which comprises steps of traffic data filtering, traffic network lane saturation modeling and signal light timing distributed region control. Rolling optimization is carried out based on a prediction model, a series of future control signals U(k) is set, under given constraints, the best solution U*(k) is solved and is used as input of a control object. A Nash optimization method is further used to solve the correlation problem among multiple subsystems, and the optimal signal period length U<n><*>(k) is acquired. The data driven method is used to do research on a lane saturation prediction model, the signal light region timing optimization based on distributed prediction control is put forward, and aset of high-efficiency control method is provided for avoiding or alleviating traffic congestion.

The invention discloses a regional short range synchronous road control method. The method comprises the following steps of: investigating the traffic flow and facility status of a road, classifying the road into a smooth road, a crowded road and an obstructed road, drawing a road running status distribution map based on an investigation result, determining boundary zones among different crowded regions and partitioning the road into a plurality of regions; and adopting the same timing scheme on signal lamps at all intersections in each region and turning on green lamps synchronously in the same flow direction for permitting passing and turning off the green lamps synchronously for forbidding passing. In a regional signal lamp timing scheme, the period length of a key intersection is taken as a regional signal lamp timing period length, and a split green ratio of intersecting directions of regional signal lamp timing is determined according to the maximum flow ratio of intersecting directions. Through the method, traffic flow in intersecting directions in a region can continuously pass through a plurality of intersections in a period without consideration of the demands and reach distribution characteristics of traffic flows in different directions in a road network, parking possibility of vehicles in intersections in a busy hour can be decreased effectively, and delay is reduced.

The invention relates to a computing method for design storm flood of mountain flood disaster small watersheds. The computing method comprises the following steps: 1) computing concentration time t diachronic design area rainfall of a representative station; 2) performing rainstorm duration distribution on the t diachronic design area rainfall to obtain a design rain pattern with a time period length of 1 hour; 3) substituting the design rain pattern into a design flood model to obtain the design storm flood, and selecting the design flood model through regional synthesis; and 4) obtaining the design storm flood of other small watersheds of a region according to the design flood model. The rainstorm attenuation index parameter is improved, so the design storm computing method is suitable for the small watersheds; the computing method is determined for the other small watersheds of the region through the regional synthesis; and the accuracy of a computing result is ensured by realistic correction.

The invention relates to the field of machine learning and wind power generation, and particularly relates to a wind power forecast method based on continuous period clustering. The wind power forecast method comprises the steps that an Elman neural network and a support vector machine are used as a forecast model to perform iterative forecasting on the basis of a similar day forecast method so asto determine the similar period length; the similarity measure standard is determined through combination of the power vector and the meteorological information according to the similar period lengththrough a two-stage search strategy, and the optimal similar period set is found in the historical data; and a wind power forecast model is created based on the Elman neural network, and the obtainedoptimal similar period set acts as the training data to perform iterative computation through the wind power forecast model so as to complete wind power forecasting of the future periods. The meteorological factor is introduced on the basis of the similar day forecast method, and the clustering-classifying-based similar period selection strategy is adopted so that the optimal similar period set can be rapidly searched and the forecast precision and accuracy can be enhanced.

The invention relates to a rotor blade of a wind power installation comprising a heating device for heating the rotor blade, arranged in the rotor blade in the area of its rotor blade surface, wherein the heating device has electrically conductive heating wires, and the heating wires run in a sinusoidal, wave-like and/or zigzag-shaped way, with an amplitude, defining a sinusoidal amplitude, wave height or respectively spike height, and a wavelength defining a period length, wavelength or respectively a distance between spikes, wherein the amplitude and/or wavelength varies along the heating wires in order to be able to adjust the specific areal heating performance of the heating device for each section.

A radio communication apparatus includes an acquiring device which acquires information required to determine a ratio between a first period length making a radio communication by using either of two first channels each having a first bandwidth and a second period length making a radio communication by using a second channel having a second bandwidth wider than the first bandwidth. The second channel is overlapping with the two first channels. A determining device determines the ratio on the basis of the information, thereby determines the first period length and the second period length. Accordingly, a radio communication by using the first channel within the first period length and a radio communication by using the second channel within the second period length are performed.

In the present invention, there is provided a display panel driving method of the type wherein the total light emitting period length within a one-field period is controlled to variably control the peak luminance level of a display panel, the driving method including a step of variably controlling, where the one-field period has N light emitting periods disposed therein, N being equal to or greater than 2, the light emitting period length of a particular one of the light emitting periods and the other light emitting period or periods to provide a difference in luminance between the particular light emitting period and the other light emitting period or periods so that the particular light emitting period is visually observed as the center of light emission.

The embodiments of the invention disclose a semi-persistent scheduling method, network equipment and terminal equipment, wherein the method comprises the following steps: the network equipment determines a semi-persistent scheduling SPS configuration parameter, wherein the SPS configuration parameter comprises SPS period length, symbol information and an SPS activation command; the SPS activationcommand is used for indicating a system frame number and a subframe number where a first time-frequency resource, which can be used for sending or receiving SPS data, is located; the symbol information is used for indicating the position of the symbol occupied by the time-frequency resource for sending or receiving the SPS data in the subframe; the network equipment determines the resource position of the time-frequency resource which can be used for sending or receiving the SPS data according to the SPS period length, the symbol information and the SPS activation command; and the network equipment sends the SPS configuration parameter to the terminal equipment. According to the technical scheme of the embodiments in the invention, the resource utilization rate of the semi-persistent scheduling can be improved, and the transmission delay of the SPS data can be reduced.

The invention relates to a DRX technology, and discloses an activation time calculating method and device used for solving the problem of unable to enter an activation state at an accurate time in a UE using expansion DRX period; the method comprises the following steps: a network side informs a serial number of a present SFN period in DRX period expansion to the UE, and the UE can calculate the activation time of the UE according to the serial number and a preset expansion DRX period length; therefore, when the expansion DRX period is bigger than the SFN period, the UE can still calculate a right calling time or/and a business data reception time, so the activation state can be entered in the accurate time, thereby effectively preventing UE calling message or business data loss caused by calculation errors, and further ensuring business QoS of the UE, and improving system service performance.