64 results about "Forward pass" patented technology

Repetitive synchronization in program code is optimized through lock coarsening that is performed subject to a number of constraints. Using a forward pass over the program code followed by a backward pass, region extent bits may be determined that identify the points in the program where object locking can be coarsened. The program code may then be modified to realize coarsened locking regions determined based on the region extent bits. Alternatively, previously determined value numbers may provide much of the information collected by the two passes. In such a case, a single pass over the program code may locate features that limit lock coarsening opportunities. A set of synchronization operations that can be removed may then be determined and used when modifying the program code to coarsen locking regions.

Inter-procedural strength reduction is provided by a mechanism of the present invention to improve data cache performance. During a forward pass, the present invention collects information of global variables and analyzes the usage pattern of global objects to select candidate computations for optimization. During a backward pass, the present invention remaps global objects into smaller size new global objects and generates more cache efficient code by replacing candidate computations with indirect or indexed reference of smaller global objects and inserting store operations to the new global objects for each computation that references the candidate global objects.

The invention provides a printing method of performing printing on a print medium. The method includes: generating dot data representing a status of dot formation on each of print pixels of a print image to be formed on the print medium, by performing a halftone process on image data representing a input tone value of each of pixels constituting an original image; providing a print head and a platen; setting a platen gap as a distance between the print head and the platen to a single fixed value that is commonly applied to plural printing environments; and performing a main scan of the print head to form a dot in each of the print pixels on the print medium supported by the platen according to the dot data in each of a forward pass and a backward pass of the print head, for generating the print image. The performing includes combining dots formed on a first pixel position group with dots formed on a second pixel position group in a common print area to generate the print image, the first pixel position group including multiple print pixels as objects of dot formation in the forward pass of the print head, the second pixel position group including multiple print pixels as objects of dot formation in the backward pass of the print head. The generating dot data includes setting a condition of the halftone process to reduce potential deterioration of picture quality due to a positional misalignment between the dots formed on the first pixel position group and the dots formed on the second pixel position group.

Inter-procedural strength reduction is provided by a mechanism of the present invention to optimize software program. During a forward pass, the present invention collects information of global variables and analyzes the information to select candidate computations for optimization. During a backward pass, the present invention replaces costly computations with less costly or weaker computations using pre-computed values and inserts store operations of new global variables to pre-compute the costly computations at definition points of the global variables used in the costly computations.

An external request to perform a file operation within a resource manager is received. The resource manager selects a resource manager file identifier that is to be an attribute of a file associated with the file operation. The file operation and the resource manager file identifier are logged in a log entry of a log. Subsequent to logging the log entry, the log entry is accessed during a forward pass through the log, for example, during a roll-forward recovery. If it is determined that the resource manager file identifier in the log entry is assigned to the file, the first log entry is not processed. On the other hand, if it is determined that the resource manager file identifier in the log entry is not assigned to the file, the resource manager file identifier is selected to be assigned to a file when the first log entry is processed.

A printing head includes a first type nozzle groups for ejecting respective inks of a first ink group, and a second type nozzle group for ejecting respective inks of a second ink group. The second type nozzle group includes twice the number of nozzles in the first type nozzle group. On the forward passes of the main scanning, ink droplets are ejected from both the first type nozzle group and the second type nozzle group. On the reverse passes of the main scanning, ink droplets are ejected from only from the first type nozzle group. With respect to the first type nozzle group, the ejection timing of the ink droplets is corrected on the reverse passes of the main scanning on the basis of a specific correction value for dot misalignment.

The location of appropriate undo data necessary for reversing an effect of an operation performed at a computer system is identified during a forward pass through a log. A cycle count can be used to determine if appropriate undo data is stored in an object or is stored in auxiliary storage. If appropriate undo data is stored in an object and the undo data would be potentially lost by processing a redo log entry to modify the contents of the object, the appropriate undo data is copied to auxiliary storage. In some embodiments, a secondary computer system receives log entries from a primary computer system. The secondary computer system can identify undo data necessary to reverse an effect of an operation performed at the secondary computer system from received log entries. Identified undo data can be copied auxiliary storage at the secondary computer system.

Determination of an adjustment value for adjusting the shifting of recording positions is made easier. The adjustment value is one for adjusting the shifting of recording positions in the direction of main scanning when ink drops are ejected and dots formed on a print medium. Patches T21-T25 and patches T31-T35 are printed in order to determine the extent (adjustment value) to which dot formation positions are shifted on a reverse pass during bidirectional printing. Each patch is formed based on the same print data D1 related to yellow (Y), light cyan (LC), and light magenta (LM) dots. Each dot is formed on the forward and reverse passes of main scanning when the patches T21-T25 are formed. The patches are printed by varying the dot recording positions on a reverse pass in small increments. The patches T31-T35 are formed solely on the forward pass of a main scan. The extent (adjustment value) to which the timing for ejecting ink drops with minimal dot formation misalignments is shifted can be determined by selecting from the patches T21-T25 the patch whose print results are the closest to the adjacent patches T31-T35.

The invention discloses a propelling system. The propelling system comprises an air inlet passage and a burning chamber; and a slope assembly used for guiding oblique detonation waves is installed in the burning chamber and comprises a sloping plate used for changing incoming flow directions, and the oblique angle of the sloping plate can be adjusted. According to the propelling system provided by the invention, by arranging the sloping plate in the slope assembly into an angle-adjustable sloping plate, when the flow velocities of incoming flows are different, the incoming flows with different flow velocities can be adapted by adjusting the oblique angle of the sloping plate, incoming flow detonation is ensured to be smoothly conducted, induced oblique detonation waves are prevented from forward passing, and using reliability of the engine is improved. The invention further discloses a supersonic velocity detonation engine including the propelling system.

The invention discloses a cooperation method used under the condition of multi-source single relay and based on compression forward pass. The cooperation method is characterized in that under the condition of multi-source single relay, multiple users use low-density parity-check codes with the same code length to code sent information; relay nodes adopt the combination technology of compression forward pass and network coding for cooperative communication; and destination nodes adopt joint iterative decoding algorithm to code received information and obtain information sent by a source. The method overcomes the problem that relay is interrupted during communication, and ensures that the relay always assists the communication during communication process; and meanwhile, with the method, certain diversity gain can be obtained through iteration decoding algorithm, so that the communication quality is improve and the communication resources are saved.

A printing method comprises: ejecting ink from ink ejecting sections provided in / on a movable print head to form dots; performing at least either printing with a first arrangement using inks arranged according to the first arrangement or printing with a second arrangement using inks arranged according to the second arrangement by changing the arrangement of inks supplied to each of the ink ejecting sections; and printing, with one forward and return movement of the print head, a correction pattern for determining a correction amount to be used for printing with the first arrangement and a correction amount to be used for printing with the second arrangement for correcting a misalignment between a position where dots are formed during a forward pass of the print head and a position where dots are formed during a return pass of the print head that occurs during printing with the first and second arrangements.

The invention discloses a resource distribution method in an orthogonal frequency division multiple access (OFDMA) relay system. The resource distribution method comprises the following processing steps: (1) calculating to obtain the number of sub-carriers which can be distributed by each user and the number of the sub-carriers which are not distributed initially; (2) distributing the sub-carriers and corresponding relays to each user; distributing the number of the sub-carriers which can be distributed to each user first and then distributing the number of the sub-carriers which are not distributed initially; and (3) obtaining a power value distributed to each sub-carrier by utilizing a Lagrange multiplier method according to the condition that the sub-carriers distributed to each forward pass user in the step (2), the sub-carriers which are transmitted by each relay and the total transmission power are checked. By the method, the requirements of each user on the rate are met; a near-far effect in wireless communication is avoided; the quick change in a wireless communication environment can be adapted very well; the calculation complexity is reduced; and meanwhile, the system resource utilization rate is improved effectively.

A wavelength division multiplexing / demultiplexing device is presented utilizing a polarization-based filter to separate odd and even wavelengths, or upper and lower channels of an input optical signal. The wavelength filter first converts the input signal to a predetermined polarization. A series of birefringent waveplates provide a polarization-dependent optical transmission function such that the polarized beam is decomposed into a first beam component carrying the first spectral band at a first polarization and a second beam component carrying the second spectral band at a second, orthogonal polarization. A beam displacer spatially separates the beam components into a pair of orthogonally-polarized beams. A quarter-wave plate converts these orthogonally-polarized beams into a pair of circularly-polarized beams, which are reflected by a mirror back along parallel optical paths through the quarter-wave plate, beam displacer, and waveplates. In the return pass, the quarter-wave plate converts the reflected circularly-polarized beams into two orthogonally-polarized beams having polarizations that are rotated by 90 degrees from those in the forward pass. The waveplates further purify the spectral characteristics of the reflected beams and maintain the polarization of one of the reflected beams, while rotating the polarization of the other reflected beam by 90 degrees so that both reflected beams have substantially the same polarization. A routing element directs one of the reflected beams exiting the waveplates to a first output port and the other reflected beam to a second output port.

The invention discloses an auxiliary debugging system for station level equipment of an intelligent substation. The auxiliary debugging system issues a debugging command to a closed loop check module through a user interaction module. An automatic debugging module controls an MMS analog transmission module inputs an analog message to the station level equipment, and meanwhile, controls the station level equipment to a 101 / 104 master station analog module and an alarm forward pass module in a message receiving module to obtain an output message of the station level equipment; an abnormality processing module is scheduled to check whether the input message and the output message of the station level equipment are matched and generates and returns a report to the automatic debugging module, and finally the report is displayed by the user interaction module to check a task. The auxiliary debugging system disclosed by the invention can be used for quickly and automatically detecting whether the station level equipment of the intelligent substation is correctly configured and modifying the same in advance, so that a worker only needs to carry out 1-2 physical experiments to finish the debugging work, thereby greatly reducing the workload of the traditional debugging work and reliving the work load of debugging personnel.

The invention discloses a two-way wave imaging method based on broadband wavelet reconstruction. The method comprises the following steps of: (1) carrying out frequency spectrum analysis on a single shot in seismic acquisition and determining the main frequency and dominant frequency distribution range of the single shot; (2) determining a wave form and an amplitude spectrum of a Ricker wavelet according to the main frequency of seismic data; (3) constructing a broadband source wavelet in combination with the frequency-band range of seismic data; (4) realizing forward modeling of the source wavelet and recording reverse-time extrapolation in a seismic wave field; (5) segmenting the recording time in the forward pass of a shot wave field and storing only two levels of wave field data at the beginning in each segment; and (6) carrying out reverse-time extrapolation and relatively imaging seismic wave fields. According to the method, the best matching of the source wavelet and the seismic recording and the precise extrapolation of the full waves are realized, the difficulty of precise imaging of complex construction and complex seismic wave fields is solved well, the amplitude and phase information of deep seismic imaging is protected effectively and the reliability of precisely imaging earthquake in a deep domain is guaranteed.

The present invention provides a data transmission method and device. According to the embodiment of the invention, a first node directly sends itself forward pass address to a second node in the condition that whether there is an X2 interface between the first node and the second node by using the first node or not. The problem is solved that how to perform optimization of the data in a dual-connection switching scene in the prior art so as to enhance the flexibility and the practicality of the data forward pass.

The embodiment of the invention provides a data processing method, a base station and a non-transient computer readable storage medium. On one hand, the data processing method comprises the followingsteps: a CU sends scheduling information to a DU, wherein the scheduling information comprises sub-frame position information capable of bearing uplink data and position information of different time-frequency resources in the sub-frame position; the DU determines uplink data on the time-frequency resources bearing uplink data as uplink forward pass data according to the sub-frame position information and the position information of different time-frequency resources in the sub-frame position; and the DU sends the uplink forward pass data to the CU. In the embodiment of the invention, as the uplink forward pass data only contain the uplink data on the time-frequency resources bearing uplink data, when the DU sends the uplink forward pass data to the CU, only the uplink data on the time-frequency resources bearing uplink data occupy the forward pass bandwidth, and thus saving the forward pass bandwidth resources.

The invention provides a dynamic boundary control system for detonation dynamic stable propagation in a supersonic airflow. The dynamic boundary control system comprises a detonation wave state monitoring system, an information analysis module and an expansion wall face adjustment and control system. When a detonation wave face position is monitored by the detonation wave state monitoring system to reach a set wave face critical position, an expansion wall power system is enabled; when the propagation state of the detonation wave is attenuation back-pass and the detonation wave reaches a detonation wave back-pass threshold position, an expansion angle of the expansion wall face is decreased, and the detonation wave is made to pass forwards till to reach a relatively stable dynamic standingposition; when the propagation state of the detonation wave is overdrive forward-pass and the detonation wave reaches a detonation wave forward-pass threshold position, the expansion angle of the expansion wall face is increased, the detonation wave is made to pass backwards till to reach the relatively stable dynamic standing position; and when the detonation wave is monitored to reach the dynamic standing position, the expansion wall face adjustment and control system is turned off, so that the relative dynamic stable propagation of the detonation wave is realized, and the continuous thrustis generated.

The invention discloses a method and system for indicating characteristics of air intake systems under back pressure of hypersonic aircrafts. The method comprises the following steps of: verifying thecorrectness of a hypersonic aircraft air intake system calculation method; simulating a hypersonic aircraft air intake system flow field to obtain air intake system schlieren figure under progressiveincrease of back pressure, judging an appointed range of distance between a shock wave forward pass position corresponding to each air intake schlieren figure and an inlet of an isolated section of the aircraft, and considering that the air intake systems are located in a non-starting boundary; and simulating the hypersonic aircraft air intake system flow field to obtain air intake system upper wall surface heat flow distribution figures under progressive increase of back pressure, judging an upper wall surface heat flow value of the inlet point at the isolated section according to each air intake system upper wall surface heat flow distribution figure, and if the upper wall surface heat flow value is greater than an appointed value, considering that the air intake systems are located inthe non-starting boundary and aerodynamic heating degrades. According to the method and system, back pressure preventing performance of the air intake systems can be pre-judged accurately, and designof the air intake systems is improved.

The invention relates to an identification method and system for the motion state of radio frequency identification tags. The method includes the step A that two sides of a check point are respectively provided with a directional antenna, the directions of the two direction antennas both are opposite to that of the check point, and distinction threshold values of forward pass or no-pass and distinction threshold values of backward pass or no-pass are set; the step B that signal strength, read by the two directional antennas, of the same radio frequency identification tags is differentiated to form difference curves; the step C that sine functions are used as generating functions, convolution calculation is carried out on the difference curves, and response curves are obtained; the step D that characteristic parameters on the response curves are selected and compared with the set threshold values at the step A, and then judgment results that whether the radio frequency identification tags forward pass or not pass and backward pass or not pass the check point can be obtained. The system comprises a threshold value setting and storing module, a difference curve generating module, a response curve generating module and a comparing and analyzing module. According to the method and system, identification error is small and both the moving direction and moving speed of the tags can be judged, and the method and the system are simple and convenient to use.

The invention provides a test pattern creation method for measuring the impact displacement of a new combination or at least three impact displacement, a test pattern, a printing apparatus and a storage medium. The test pattern creation method creates a test pattern through at least three modes in the parts for measurement of the impact displacement generated in the following conditions: a print head displacement between first and second print heads, chip displacement between first and second print chips, round-trip displacement between a forward pass and a reverse pass of main scanning, column displacement between first and second nozzle columns, position displacement of the first print head around a main scanning direction, and position displacement of the first print head, and an impactdisplacement due to position displacement of the first print head around a direction orthogonal to the main scanning direction and a direction intersecting with the main scanning direction. The testpattern has a length in a sub scanning direction less than that of the head. The at least three parts are arranged in the sub scanning direction.

The invention provides a printing method of performing printing on a print medium. The method includes: generating dot data representing a status of dot formation on each of print pixels of a print image to be formed on the print medium, by performing a halftone process on image data representing a input tone value of each of pixels constituting an original image; generating the print image by combining forward pass dots with backward pass dots in a common printing area in such a manner that each main scan line includes both the forward pass dots and the backward pass dots, the forward pass dots being formed on a plurality of pixels of a first pixel group in a forward pass of main scan of a print head, the backward pass dots being formed on a plurality of pixels of a second pixel group in a backward pass of main scan of the print head. The generating dot data includes setting a halftone process condition for reducing a deterioration of image quality due to a positional misalignment between the forward pass dots formed in the first pixel group and the backward pass dots formed in the second pixel group.

A system and method for depositing a substance onto a continuously moving substrate in first and second transverse swathes, is achieved by providing a print carriage having a first set of inkjet heads and a second set of inkjet heads. The carriage is traversed across the substrate in a forward pass, while depositing the first and second swathes from the respective first and second plurality of inkjet heads and subsequently traversed across the substrate in a reverse pass. The first and second sets of inkjet heads are arranged such that the first and second swathes complement one another on both forward and reverse passes to provide substantially complete coverage of the substrate. In this manner complementary swathes may be deposited from a single head.

An optically nonlinear crystal is arranged for frequency-doubling an input pulse. The crystal has parallel facets each coated with a reflective coating. The crystal is arranged with respect to the input pulse such that the input pulse makes a plurality of forward and reverse passes between the coatings. A frequency-doubled pulse is generated on the forward passes. The input pulse and the frequency-doubled pulse propagate with different group velocities in the crystal such that temporal separation the pulses occurs. The crystal and reflective coatings are configured such that the temporal separation does not exceed a predetermined value.