660results about How to "Eliminate bad effects" patented technology

A buck-boost switching regulator which includes a first switch, a first diode, an inductor, a second switch, a second diode, and a controller for controlling the first switch and the second switch, the controller being configured to receive a current signal indicative of a inductor current flowing in the inductor, and generating a signal indicative of an average current flowing in the inductor, the average current being utilized to control the first switch and the second switch, wherein the controller includes a first compensator circuit for outputting a voltage error signal, a second compensator circuit for outputting a current error signal and a modulator circuit to output a first control signal to control the first switch and a second control switch to control the second switch.

In a method of a manufacturing flat display apparatuses by working flat substrates, a flat substrate is prepared having a first region which is used as a flat display apparatus and a second region outside the first region. After the first region is worked as desired, the second region is cut and separated from the flat substrate.

The invention provides an array substrate and a liquid crystal display panel. The array substrate comprises a plurality of thin-film transistors, a first flat layer, a touch wire layer and a second flat layer, wherein the thin-film transistors are arrayed in a matrix manner; each thin-film transistor comprises a grid electrode, a source electrode and a drain electrode; the first flat layer covers the thin-film transistors; the touch wire layer is positioned on the first flat layer and comprises a plurality of touch wires; and the second flat layer is positioned on the touch wire layer. The problem that the surface of a film layer positioned above touch wires is not flat due to arrangement of the touch wires in the touch wire layer is solved, and harmful effects of arrangement of the touch wires on a follow-up manufacturing procedure are eliminated. The touch wires are positioned between the two flat layers, and an insulating layer which is adjacent to the touch wire layer is omitted. Only an insulating layer arranged between a common electrode and a pixel electrode remains. The second flat layer is arranged on the touch wires, so that the flatness of the portion above the touch wires is high, and friction light leakage is avoided. The touch wires can be thick, and the whole resistance of the touch wires is reduced.

The invention discloses a magneto-electric coder calibration method based on an arc tangent crossing interval tabulation method and relates to the field of magneto-electric coder manufacturing. The method comprises steps of carrying out signal acquisition on a magneto-electric coder; by use of the arc tangent crossing interval tabulation method, calculating the measurement angle of the magneto-electric coder; by dividing the whole circumference into eight 45-degree sub-intervals in a 360-degree manner, thereby avoiding a problem of easy occurrence of wrong calculation caused by quite big calculation difficulty when there is positive and negative infinity in the arc tangent values; and finally, using a 16-bit precision photoelectric coder measurement value as the reference, carrying out calibration correction on a measurement angle solved by the arc tangent method based on a crossing interval average tabulation method, and eliminating errors in a crossing interval linear interpolation manner. According to the invention, a problem of decreasing of measurement precision caused by existence of the positive and negative infinity values and mechanical errors in magnetic steel positions in the traditional arc tangent method can be overcome; and angle calibration can be performed on the magneto-electric coder.

A display and a driving method for the same capable of constructing clear visual images is described. In the display, a plurality of conductive pads are opposed to a back electrode with a light influencing medium such as a liquid crystal layer. Control signals are supplied to the conductive pads through complimentary transistors comprise a p-channel field effect transistor and an n-channel field effect transistor connected between VDD and VSS lines of a control circuit, which also supplies a bias voltage to the back electrode and gate control signals to the gate terminals of the p-channel field effect transistor and the n-channel field effect transistor. During operation, the bias voltage is inverted in order to invert the polarity of control signal applied across the light influencing medium.

The invention relates to application of a microbial fermentation method in co-production of wheat bran oligose and dietary fiber. The invention aims to developed and utilize the wheat bran comprehensively; an efficient biological process route is adopted to deeply processing wheat bran, and the microbial fermentation method is used to prepare wheat bran dietary fiber and functional oligose simultaneously. The microbe used in the method refers to a single strain, pullularia pullulans or mixed strains of aureobasidium pulluans and agrocybe aegerita; in fermentation of wheat bran, substances in the wheat bran, such as starch and protein, can be taken as nutritional ingredients for the growth of microbes, when digesting the substances, the microbes can generate xylanase so as to hydrolyze wheat bran hemicellulose to generate oligose and prepare dietary fiber simultaneously. According to the method, the research and development idea of developing a single product is broken through, the rate of multipurpose utilization of the resource is high, the production costs is low, chemical substance residual does not exist, the environment is not polluted, a new processing technology model of 'ecological, low-carbon and efficient circulating' is formed, and the additional value of the wheat bran product is increased.

The invention discloses a fiber optical frequency transmission method based on compensation of a remote end. The method is characterized in that first of all, optical signals start from a local end and are transmitted to the remote end via a transmission fiber A, then beat frequency probe light of the local end is transmitted to the remote end by use of a fiber B connected with the local end and the remote end, and accurate measurement of fiber noise is realized at the remote end. According to the invention, under the condition that the same transmission precision is guaranteed, a light frequency transmission apparatus can greatly simplify a sending apparatus, facilitates expansion to single-point-to-multipoint transmission and facilitates further construction of a topology network.

The invention provides a transformer protection method and a protection device with exciting inrush current restrain and switch parameter detection and relates to the technical field of transformer protection in the power transformation and distribution process. The protection method comprises the following steps of: firstly, detecting the state change of a circuit breaker on a real-time basis; secondly, dynamically evaluating the state of the circuit breaker; thirdly, collecting the position of an auxiliary contact of the circuit breaker and the voltage of a power grid and calculating the change on the voltage phase position of the power grid in real time; fourthly, obtaining a method for restraining the exciting inrush current and obtaining an expected closing phase position; fifthly, calculating the effect of the closing delay time to obtain a phase position Qon_c and sending out a closing command after the expected closing phase position is obtained; and sixthly, enabling a master control system to send out a closing command after a voltage phase position of a power supply reaches the Qon_c. The device comprises a CPU (Central Processing Unit) main board, a sampling board, a power supply, a switch input board, a logical board, a display board and the like, wherein the CPU, the sampling board and the power supply are inserted on a backboard. Through the transformer protection method and the protection device, the no-load closing exciting inrush current of the transformer can be reduced to below 30 percent of rated current, so that the bad effect of the exciting inrush current on the power grid and the transform is completely eliminated.

The invention belongs to the field of cell frozen preservation, particularly relates to a cell frozen preservation solution and a cell frozen preservation method and provides a cell frozen preservation solution. The cell frozen preservation solution comprises a basic culture medium, a blood platelet lysate, bFGF and L-glutamine. The cell frozen preservation solution does not contain animal serum or DMSO, the possibility that an exogenous virus can be introduced by the animal serum is eliminated and the bad effect of the DMSO on adipose-derived stem cells is eliminated. Furthermore, the invention further provides the cell frozen preservation method. According to the method, complicated programmed cooling is not needed and operation is simple. After the adipose-derived stem cells are frozen and preserved by adopting the cell culture medium and the cell frozen preservation method for a year, the survival rate of the cells can reach 93% and the differentiation capacity of the adipose-derived stem cells is not affected.

The invention discloses a device for measuring solid material heat conductivity. The device comprises a closed vacuum cavity, a heating source, a first metal block, a second metal block, a third metal block and a fourth metal block, cooling devices, and temperature measuring devices, wherein the vacuum cavity is connected with an external vacuumizing device through an exhaust tube; the heating source is arranged in the vacuum cavity; the first metal block and the second metal block are respectively adhered to the two sides of the hearting source; an accommodating space is formed between the first metal block and the third metal block; the accommodating space is formed between the second metal block and the fourth metal block; the accommodating spaces are used for placing a solid material to be measured; the cooling devices are arranged outside the third metal block and the fourth metal block; and the temperature measuring devices are arranged on each metal block and are used for measuring the temperature of the metal blocks. The device of the invention can acquire measured values more accurately, and can improve final measurement precision.

The invention provides a locking device with hinge with a double spherical hinge bearing structure for pile legs of a self-elevating drilling platform, which comprises a top locking assembly, a bottom locking assembly and a locking block, wherein the locking block is tabled on a pile leg rack through a cog, and the top locking assembly and the bottom locking assembly are respectively assembled on bearing platforms at the upper side and the lower side of the locking block and are respectively contacted with the locking block through a top wedge block and a bottom wedge block; and a top upper spherical hinge, a top lower spherical hinge, a bottom upper spherical hinge and a bottom lower spherical hinge are respectively arranged at the contact places of the top locking assembly and the bottom locking assembly as well as the bearing platform, the top wedge block and the bottom wedge block. With the scheme, the invention not only ensures the effective locking of the platform, but also solves the problem that the locking device is difficult to unlock; and each locking device is uniformly loaded after locking, and the load smoothly transfer between a lifting device and the locking device, thereby greatly saving the operating time of the staff.