50results about How to "Reduce parallelism" patented technology

An antenna configuration includes two closely spaced antennas each positioned so as to be orthogonally polarized with respect to the other. The antenna configuration increases antenna isolation and reduces electromagnetic coupling between donor side antenna and repeat side antenna. The antennas include printed dipoles connected to respective transceivers through respective baluns to balance the non-symmetrical portions of the antenna feed paths to reduce unwanted radiation therein. Printed features such as chokes and non-symmetrical and non-parallel structures are preferably included in the ground plane of a multi-layer circuit board to reduce or eliminate circulating ground currents.

The invention discloses a pressure chamber for a CT triaxial test. A pressure chamber cylinder, a pressure chamber upper fixing flange and a pressure chamber lower fixing flange are cemented and are sealed by a pressure chamber top cover and a pressure chamber pedestal, a loading piston is arranged on the pressure chamber top cover, a sample pedestal is arranged on the pressure chamber pedestal, a lower pressing head, a sample and an upper pressing head are arranged between the loading piston and the sample pedestal in the pressure chamber, and a reaction frame comprises a reaction column fixed on the pressure chamber top cover through a reaction column locking nut. The pressure chamber for the CT triaxial test provides axial loading for the sample by arranging a flat jack between the loading piston and the reaction frame. The pressure chamber has a simple structure, is portable, solves a problem of the influence of the rotation precision of a rotary stage by the overweight of the pressure chamber, and can acquire the confining pressure, the axial load and the sample deformation during CT scanning.

The invention discloses an LDPC (low-density parity-check) decoding method which comprises the following steps: dividing a quasi-cyclic check matrix; grouping the divided check matrix; determining the positions of a check node and an information node in each submatrix group; determining a grouping matrix according to the positions of the check node and the information node; initializing the node information according to the structure of the grouping matrix; and decoding according to the structure of the grouping matrix. The invention solves the problems of single parallel mode and high FPGA (Field Programmable Gate Array) resource consumption for realizing the decoding algorithms in part of existing parallel structure LDPC decoding algorithms.

A contained resonant cavity. The contained resonant cavity includes a first surface and a second surface that are partially transmissive and partially reflective. One or more reflective sidewalls are positioned between the first surface and the second surface. In a specific embodiment, the first surface and the second surface are substantially parallel and represent input and output surfaces, respectively, of the contained resonant cavity. The one or more sidewalls are approximately perpendicular to the first surface and the second surface and include a first sidewall having a first substantially reflective planar surface that faces a second substantially reflective planar surface of the second sidewall. A fourth sidewall and a fifth sidewall have fourth and fifth substantially reflective facing sidewalls, respectively. In an illustrative embodiment, the one or more sidewalls include plural reflective sidewalls arranged perpendicularly between the first surface and the second surface to form an array of contained resonant cavities therebetween. The array of contained resonant cavities is readily employed in various applications including unique tunable optical filter arrays, lens-less imaging systems, and multispectral imaging systems.

An illumination device includes: a light source that emits first light at a first wavelength; an integrator optical system that the first light enters; a wavelength conversion element that converts the first light transmitting through the integrator optical system into second light at a second wavelength different from the first wavelength; a wavelength separation element provided on an optical path of the first light between the integrator optical system and the wavelength conversion element; a pickup optical system that is provided between the wavelength conversion element and the wavelength separation element and receives the first light and the second light; and a chromatic aberration-correcting optical element provided at least one of between the integrator optical system and the wavelength separation element on the optical path of the first light and at downstream of the wavelength separation element on an optical path of the second light.

The invention discloses a hardware implementation method and system for a high-throughput FEC in an OTN system and relates to the field of optical fiber communication error control. The method includes the following steps that multiple beats of transmitted data with the bit width of W1 are integrated into one beat of integrated data with the bit width of W2; the beat of integrated data is evenly divided into information code elements of 16 RS code words; the information code elements of the 16 RS code words are coded to obtain 16 coded RS code words; the 16 coded RS code words form OTUk data with the bit width of W2; the OTUk data with the bit width of W2 form multiple beats of OTUK data with the bit width of W1. The high throughput of the whole FEC is realized, meanwhile, the degree of parallelism is reduced when an RS (255, 239) coder is implemented, the hardware resources for implementation of the whole FEC are reduced, the implementation scale is small, the data processing capacity of RS (255, 239) parallel cording can be ensured, and the method and system can be utilized by people conveniently.

The invention discloses a flexible sealing structure of a rotary air pre-heater. The flexible sealing structure is a contact type sealing device and comprises a sealing sliding block, a regulation supporting seat and a supporting fixing plate; the sealing sliding block is rotatablely connected with the supporting fixing plate; the supporting fixing plate is relatively arranged on a radial baffle plate of the air pre-heater fixedly; the regulation supporting seat is fixedly connected with the supporting fixing plate; a compression spring is arranged between the regulation supporting seat and the sealing sliding block; the sealing sliding block is in contact with a fan-shaped plate or an axial arc-shaped plate of the air pre-heater; a reset regulation device is arranged between the sealing sliding block and the regulation supporting seat; two ends of the reset regulation device are respectively connected with the sealing sliding block and the regulation supporting seat; and the reset regulation device is used for regulating the maximal resilience modulus of the compression spring positioned between the sealing sliding block and the regulation supporting seat. By using the flexible sealing structure, through regulating the reset regulation device, the regulation of sealing acting force between a moving component and a stationary component in the air pre-heater is realized; the wear of a sealing surface is decreased; and the service life of a quick-wear part is prolonged.

A V-face of a metal element is prevented from being inclined due to a load from a pulley by increasing the height Hs of an upper non-contact portion of the V-face of the metal element. For example, when the height of the V-face is represented by Hv (mm), and the height of the upper non-contact portion of the V-face is represented by Hs (mm), the height Hv of the V-face and the height Hs of the upper non-contact portion are set so that a relationship <paragraph lvl="0"><in-line-formula>-0.5265Hv+2.768<=Hs<=-0.5934Hv+3.524 </in-line-formula>is established.

The invention discloses a high-speed bullet train brake disc body and a casting method and heat treatment method thereof. The brake disc body is obtained through casting and heat treatment, an upper disc surface and a lower disc surface of the disc body are parallel to each other, and the upper disc surface and the lower disc surface of the disc body are connected through a plurality of U-shaped blocks which are uniformly distributed. According to the physical design of the disc body, a good balance degree of the disc body during high-speed rotation is guaranteed, and the amplitude during high-speed braking of the brake disc is greatly reduced; according to the design of the casting technique of the disc body, the quality of the disc body is greatly improved, and a high safety coefficient and a long service life of the disc body in long-time continuous braking are guaranteed; and according to the design of the heat treatment technology, the strength and the impact to be borne by the disc body during high-speed braking under the extremely-cold environment are reduced, and the thermal warping deformation generated in the continuous braking process is also reduced.

The invention discloses a high-throughput FFT/IFFT-based FPGA signal processing method and relates to an FPGA technology. The method comprises the following steps of 1) reading data of a low-frequency signal; 2) writing contents of the data of the low-frequency signal into a first storage region and other storage regions of an RAM in sequence; 3) under the control of a high-frequency read clock, reading the data contents written into the storage regions in sequence through a sliding window, and outputting the data contents in the sliding window in sequence to form data flow; and 4) from a starting moment of the data flow, enabling an Nth FPGA to enter a data processing stage after (N-1) waiting cycles to read the data flow, performing FFT calculation, and outputting a calculation result. Through the RAM, low-rate data is converted into high-rate data, so that subsequent modules can work at a relatively high frequency, the purpose of reducing degree of parallelism is achieved, and finally the hardware consumption is reduced. The method is simple in algorithm and easy for engineering realization.

Provided are nucleic acid extraction apparatuses and operation methods thereof. The apparatus may include at least one cyclically moveable annular structure, at least one pipetting mechanism, at least one injection mechanism and a driving mechanism. The annular structure may be provided with a plurality of cuvette positions and a plurality of operation positions. The pipetting mechanism and the injection operation may be arranged along the annular structure. The driving mechanism may drive the annular structure to move cyclically.

The present invention provides a nonuniform saw tooth search motion estimation method which combines a statistical feature of the motion estimation and sets a feature point and a feature zone in a certain search zone, and sets a nonuniform saw tooth search path. Thus on one hand the invention guarantees a certain search range and enables the best matching point to avoid the local excellent selection defect; on the other hand, a point to point movement and non-repeated path effectively reduce the search point number, implement the reuse of the data, thereby reducing a motion estimation implemented parallel number and better conforming a demand for implementing coding.

The invention discloses a quasi-cyclic matrix and a construction method thereof applied to channel coding in wireless communication.The quasi-cyclic matrix comprises a plurality of first-level sub-matrixes and a plurality of second-level sub-matrixes located in each first-level sub-matrix, each first-level sub-matrix is obtained through weighted cyclic shift expansion based on the base matrix, andeach second-level sub-matrix is obtained through weighted cyclic shift expansion based on the first-level sub-matrix where the second-level sub-matrix is located. The quasi-cyclic matrix is composedof two stages of sub-matrixes, and each secondary sub-matrix is obtained through secondary expansion according to a primary expansion mode based on the primary sub-matrix where the secondary sub-matrix is located, so that the parallelism degree of the decoder can be greatly reduced by reducing the size of the secondary sub-matrix, and different node parallelism degree requirements of the decoder are met; besides, the number of short rings in the quasi-cyclic matrix can be effectively reduced by selecting appropriate shift values of the first-level sub-matrix and the second-level sub-matrix, and compared with a traditional quasi-cyclic matrix, the quasi-cyclic matrix is wide in application range.

The invention discloses a circular rolling mechanism for a steel ball. The circular rolling mechanism comprises a fixed part, a moving part and a plurality of rolling steel balls. The rolling steel balls are divided into loading steel balls, reverse steel balls and returning steel balls according to different positions. The fixed part is a U-shaped groove structure in shape, and fixed loading rollaway nests are arranged on two sides of the inner wall of the U-shaped structure of the fixed part; the moving assembly comprises a slide block, a reverser and a ball returning pipe. The circular rolling mechanism has the advantages that the processing demands on mechanical products such as a linear rolling guide rail, a sliding table and a module employing the mechanism can be reduced, and the assembling efficiency is improved, so that the manufacturing cost of the product is reduced; and meanwhile, the colliding noise between the steel balls and the walls of the ball returning hoes can be reduced.

The invention provides an automatic-regulating type hot-pressing head structure suitable for flip chip die bonding. The automatic-regulating type hot-pressing head structure comprises a hot-pressing head arranged on a laminating machine and is characterized in that an elastic film produced by high-elasticity alloy materials coats the surface of the hot-pressing head, the elasticity modulus E of the elastic film is lower than 200GPa, the compressive strength of the elastic film is higher than 0.2GPa, and the thickness of the elastic film ranges from 100 micrometers to 10cm. The invention further discloses flip chip laminating machine integrating electricity, machinery, light and image and using the hot-pressing head. The automatic-regulating type hot-pressing head structure has the advantages that the defects that an existing hot-pressing head is high in parallelism requirement and poor in yield during chip surface mounting are overcome, high-precision hot-pressing head manufacturing under a common machining precision condition is achieved, the surface of the elastic film of the hot-pressure head can always attach to the surface of a workpiece during use, the position of the workpiece can be adjusted according to the flatness of the workpiece, product quality is guaranteed, and the automatic-regulating type hot-pressing head structure is suitable for batch production due to the fact that the parallelism requirements are lowered.