45results about How to "Reduce performance variance" patented technology

The invention concerns a single-layer fabric comprising two yarns, a so-called comfort cellulosic material yarn and a technical yarn with high abrasion and temperature resistance properties, said two yarns being woven or knitted so as to define at least two separate portions in the thickness of the fabric, a first outside portion, with a majority of technical yarn, and a second inside portion, with a majority of comfort yarn, said portions being at least partly entangled. The invention is characterized in that the technical yarn, produced from continuous filaments, whereof the web is coated over at least 75% of its surface with a coating comprising at least partly natural fibers.

The invention belongs to the technical field of functional coatings and particularly relates to a novel anti-pollution flashover coating for an ultra and super high voltage insulator. The novel anti-pollution flashover coating comprises, by mass, 40%-50% of room temperature vulcanized silicone rubber, 5%-10% of titanate coupling agent, 2%-6% of composite fire retardant, 5%-12% of modified composite reinforcing agent, 2%-4% of nano TiO2, 0.5%-1% of surface active agent, 1%-5% ofhexamethyldisilazane, 0.2%-0.5% of antifoaming agent, 0.3%-0.6% of catalyst, 0.3%-0.6% of cross-linking agent and the balance solvent. The prepared anti-pollution flashover coating is sprayed on the surface of the cleaned ceramic insulator, and the coating can be used after being naturally cured for 96 hours under the condition of 25 DEG C+/-2 DEG C and 40%-70% of RH. According to the anti-pollution flashover coating, after the sprayed anti-pollution flashover coating is completely cured, the contact angle is not smaller than 135 degrees.

Disclosed is a method for manufacturing a chip scale package (CSP) for a light-emitting diode (LED). The method may include a light-emitting device mounting step for mounting a plurality of light-emitting devices on a substrate strip, a phosphor forming step for forming a phosphor on the plurality of light-emitting devices, a reflective member forming step for forming a reflective member on the substrate strip to surround the phosphor, and a package singulation step for singulating unit packages by cutting the substrate strip and the reflective member.

In order to solve the problems that a B5G/6G network faces higher coverage and larger capacity requirements and an existing ground cellular network is difficult to guarantee the performance of edge users, the embodiment of the invention provides a macro station user distribution scheme for an unmanned aerial vehicle auxiliary cellular network, so that dynamic coverage is provided for the edge users. The method is beneficial to high channel gain brought by a large-probability line-of-sight link of an unmanned aerial vehicle base station; according to the scheme, one or more unmanned aerial vehicles take the ground macro base station as the center and do circular motion in the clockwise or anticlockwise direction, and a high data transmission rate is provided for macro cell users by utilizing the sight distance link and the antenna gain. By adjusting parameters such as the movement track radius, the flight height, the flight speed and the transmitting power of the unmanned aerial vehicle, the coverage range of the unmanned aerial vehicle is dynamically adjusted, and therefore network performance maximization is achieved.

The invention discloses a low-cooling-rate sensitive high-nucleation-capacity AlNbTiBRE composite refining modifier used for aluminum alloy and a preparation method of the low-cooling-rate sensitive high-nucleation-capacity AlNbTiBRE composite refining modifier used for aluminum alloy. The low-cooling-rate sensitive high-nucleation-capacity AlNbTiBRE composite refining modifier is prepared from Al-xNb-yTi-zB-kRE, wherein 0.01<x<=6wt%, 0.01<y<=6wt%, 0.01<z<=1wt%, 0.01<k<=1wt%, and the balance is Al; and RE is one of La, Ce, Nd, Er, Gd, Y, Yb and Sc or a mixture of two or more of La, Ce, Nd, Er, Gd, Y, Yb and Sc. A preparation technology is simple, and the compositions can be precisely controlled. The composite refining modifier is used for processing aluminum alloy, and the refining effect and the modifying effect are excellent; for all parts of castings complex in shape and different in thickness, namely, all parts with different cooling rates, the cooling rate sensitivity of the refining effect is low; and the mechanical performance of the obtained alloy is remarkably improved, and the performance difference between the parts with different cooling rates is remarkably reduced.

The invention, which relates to the field of optical communication, discloses a method and system for improving a bandwidth allocation efficiency. The method comprises: in a passive optical network (PON) system, an optical network unit (ONU) detects each transmission container TCONT in real time; when one certain TCONT is detected to be buffered and overflowed, a private message for reporting buffering and overflowing is sent to an optical line terminal (OLT); according to the message for reporting buffering and overflowing, the OLT sends a private message for indicating the ONU to start an overflowing allocation mechanism to the ONU; after the ONU receives the message for indicating the ONU to start the overflowing allocation mechanism, the overflow allocation mechanism is started and an actual buffer flow of the TCONT is calculated, and the calculated actual flow is sent to the OLT; and on the basis of the actual buffer flow of the TCONT, the OLT allocates the bandwidth to the TCONT dynamically.

A fuse includes a conductive member formed integrally with a melting portion that melts and breaks when overcurrent occurs, two shielding portions arranged on the conductive member to hold the melting portion in between, and a case formed from an electrically-insulative material. The case encloses the melting portion in cooperation with the two shielding portions.

The invention discloses a low-cooling-rate-sensitivity high-nucleation-ability grain refiner for cast aluminum alloy and a preparation method thereof. The grain refiner comprises Al-xNb-yB-zRE, wherein x is higher than 0.01wt% and not higher than 6wt%, y is higher than 0.01wt% and not higher than 3wt%, z is higher than 0.01wt% and not higher than 1wt%, and the balance Al; RE is one or more of La, Ce, Nd, Er, Gd, Y, Yb and Sc. Meanwhile, the invention discloses the smelting method for preparing the grain refiner, and the preparation technological process is simple. The grain refiner is used for carrying out grain refining on the cast aluminum-silicon alloy, the refining effect is superior, the cooling-rate sensitivity on the refining effects of casting portions in complex shapes and different thicknesses, namely the portions with different cooling rates is low, the mechanical performance of the refined alloy is remarkably improved, and the difference of performance between the portions with the different cooling rates is remarkably lowered.

A circuit in a physical unit (PHY) is disclosed, the circuit comprising two trios and a combo wire therebetween, wherein each of said trios includes three wires, and wherein said combo wire is configurable as a signal, floating, or any dc voltage, furthermore, a Quad-IO block is designed for transmit data in two D-PHY lanes with the combo wire configured as a signal wire or a C-PHY trio with the combo wire configured as a shielding wire, such that the same Quad-IO block can be instantiated multiple times in a physical unit for meeting different bandwidth requirements as well as for placing pads along a same direction for preventing performance difference between D-PHY lanes or C-PHY trios.

A tire having an asymmetric tread pattern that land proportion of outer side area 2o is larger than inner side area 2i, but having a reduced difference in drainage performance between tires on right and left wheels, the tire having tread surface 2 divided by four circumferential grooves 3 and 4 into center land 5, middle lands 6, 6 and shoulder lands 7, 7, wherein middle land 6o and shoulder land 7o in the outer side area 2o are divided respectively by outer middle lateral grooves 8o and outer shoulder lateral grooves 10o into blocks 9o and blocks 11o, inclination direction of the middle lateral grooves 8o is opposite to that of the shoulder lateral grooves 10o with respect to tire axial direction, and the lateral grooves 8o and 10o are inclined at an angle θmo between 5° and 45° and at an angle θso between more than 0° and not more than 40°, respectively.

The invention discloses a 7-series aluminum alloy profile used for a civil aircraft first rib and a preparation method thereof and belongs to the field of manufacturing of aluminum alloy profiles usedfor a civil aircraft. The profile comprises the following substances including, by weight, smaller than 0.08% of Si, smaller than 0.10% of Fe, 2.1%-2.4% of Cu, 2.0%-2.2% of Mg, smaller than 0.05% ofMn, smaller than 0.02% of Cr, 7.8%-8.2% of Zn, 0.02%-0.06% of Ti, 0.08%-0.12% of Zr and the balance Al. According to the 7-series aluminum alloy profile used for the civil aircraft first rib and the preparation method thereof, to meet requirements for the performance of the aluminum alloy profile used for the civil aircraft first rib, an ingot casting step heating isothermal reverse extrusion technology, a combined tooling uniform stretching technology and the like are adopted, the uniformity of the performance of different portions of the profile is guaranteed, and the 7-series aluminum alloyprofile meeting the using requirements of the domestic civil aircraft first rib is produced.

The invention discloses a catalyst degradation method which comprises the following steps: impregnating the catalyst to be degraded in phosphoric acid or phosphate solution; then calcining the impregnated catalyst; and finally performing thermal aging treatment. Difference in performance between the catalyst after the degradation treatment by the method and the practically used catalyst is relatively small, and the precision is high.

The invention discloses a rolling process plate form control method for high-strength steel with the thickness specification being 6 mm or below. The plate form control method comprises the procedures of heating, rough rolling, finish rolling, controlled cooling and hot straightening. In the heating and rolling processes, the integral temperature uniformity of a casting blank and an intermediate blank and structure state uniformity after phase changes happen are sufficiently considered, and the problems that in the medium-thick plate steel ball rolling process, due to the reason in the aspect of the technology, stress is uneven, stress is generated due to the uneven temperature and the structure difference, and consequently irregular deformation is caused are solved. According to the plate form control method, the blank thickness compression ratio is smaller than or equal to 20, the elongation ratio is smaller than or equal to 16.5, and the lateral spread ratio meets the formula: 1.0<=W<=1.4; the thickness of an obtained steel plate is smaller than or equal to 6 mm, and according to the steel plate performance, the yield strength is larger than or equal to 355 MPa; and the surface irregularity of the steel plate is smaller than or equal to 8 mm/2m.

The invention relates to a low-crack-sensitivity steel plate with yield strength of 960MPa, which comprises the following chemical components in percentage by weight: 0.06 to 0.10 percent of C, less than or equal to 0.20 percent of Si, 0.70 to 1.00 percent of Mn, 0.015 to 0.035 percent of Al, 0.015 to 0.025 percent of Ti, 1.15 to 1.35 percent of Cr, 0.001 to 0.005 percent of B, 0.0010 to 0.0050 percent of Ca, less than or equal to 0.015 percent of P, less than or equal to 0.003 percent of S, less than or equal to 0.0015 percent of O, less than or equal to 0.0030 percent of N, less than or equal to 0.00015 percent of H and the balance of Fe and inevitable impurity elements, and the carbon equivalent CEV is less than or equal to 0.54 percent. The production process comprises the following steps: electric furnace or converter steelmaking-gt; lF refining-gt; vD or RH high vacuum degassing-gt; continuous casting-gt; heating rolling-gt; carrying out online quenching-gt; and tempering. The steel plate structure is a fine tempered sorbite structure, and the grain size is smaller than or equal to 30 microns; the yield strength of the steel plate is larger than or equal to 960 MPa, the tensile strength of the steel plate is larger than or equal to 1000 MPa, and the ductility of the steel plate is larger than or equal to 10%; and transverse and longitudinal impact toughness Akv at-40 DEG C is greater than or equal to 30J.

A transistor circuit having a dummy capacitor or a dummy transistor between an input terminal and a transistor is disclosed. The circuit improves secondary nonlinear characteristics of the transistor attributable to one or more parasitic components and a clock signal. The transistor circuit includes an input terminal configured to receive an input signal, a transistor having a gate configured to receive a clock signal, and a source connected to the input terminal, a connection line between the input terminal and the transistor and having a parasitic resistor therein, a parasitic capacitor between the input terminal and the transistor, and a dummy transistor having a first terminal that is connected to the connection line between the input terminal and the transistor.

The invention provides an ultraviolet curing device for an annular sample of a lining pipe and application. The device comprises a fixing part, a first barrel film, a second barrel film, an ultraviolet lamp, a controller, an air compressor and a traction mechanism, and can directly cure and form an annular sample of a lining hose, so that the manufacturing of the annular sample of the lining hose is very convenient; the sample manufactured by the device is more regular, the performance of the sample is closer to that of practical application, and errors caused by irregular samples or experimental condition differences are reduced. The device is used for preparing the lining ring-shaped sample, is particularly suitable for manufacturing a ring stiffness performance test sample when an ultraviolet curing hose is researched, can also be cut into a pipe piece shape to be used for bending a performance test sample, and can also be used for analyzing the influence of a material structure on the mechanical property of a cured lining pipe. The method simulates the field operation of the lining hose in the pipeline, reduces the deviation of sample performance before and after construction, and is more beneficial to construction.