189results about How to "Isolation high" patented technology

The invention discloses a method based on the topology protection of a distributing network, which comprises the following steps: (1) all distributing automation terminals respectively form a distributing network topology structure, and each distributing automation terminal is linked with adjacent nodes in a lateral communication mode; and (2) whether each switch is an adjacent node is judged based on a line failure criterion; if yes, the network topology protection corresponding to the switch is activated to trip the switch of the node; and otherwise, the network topology protection is not activated, wherein the line failure criterion is as follows: if the switch is not a transformer substation outlet switch and a line overcurrent failure is detected in one and only one of N adjacent nodes, the fact that the switch is a failed adjacent node is judged; and if the switch is a transformer substation outlet switch and a line overcurrent failure is detected in one and only one of N nodes including the transformer substation outlet switch, the fact that the transformer substation outlet switch is a failed adjacent node is judged. The method can rapidly, accurately and selectively position the failure and isolate the failure.

The invention discloses a high-reliability FBAR (thin-film bulk acoustic resonator), which is characterized in that an isolation layer is arranged on the whole substrate, and an air cavity, which sinks downward from the upper surface of the substrate, is arranged between the substrate and the isolation layer; a lower electrode, a piezoelectric layer and an upper electrode are arranged on the isolation layer, and a passivation layer, which at least covers an exposed portion of the whole upper electrode and/or the lower electrode, is arranged on the upper electrode. Compared with an existing FBAR, the FBAR disclosed by the invention is additionally provided with the isolation layer, which is identical to the substrate in size, on the substrate. On the one hand, requirements for a substrate material in the aspect of resistivity can be reduced, thereby reducing the cost of the substrate; and on the other hand, isolation between the substrate and a device can be improved under the premise of not changing the substrate material, thereby improving the open-circuit impedance of the resonator. The FBAR disclosed by the invention is further additionally provided with the passivation layer on the exposed portion of the upper electrode and/or the lower electrode, thereby being capable of effectively preventing influences brought to the device performance and the long-term reliability by modification such as oxidation and the like of the upper electrode and/or the lower electrode.

The invention relates to liquid band-aid and a preparation technology thereof. The liquid band-aid is prepared from the following components in percentage by weight: 5%-20% of a film-forming agent, 4%-12% of a softening agent, 0.1-8% of an antibacterial agent, 3%-10% of a haemostatic and analgetic agent, 1%-5% of a healing agent, and 53%-83% of a solvent. The preparation technology comprises the following steps: adding 5%-20% of the film-forming agent and 53-83% of the solvent into a reactor, and soaking for 1-2 h; heating to 65 DEG C to 70 DEG C so that the film-forming agent completely swells; and sequentially adding the softening agent, the antibacterial agent, the haemostatic and analgetic agent and the healing agent into the reactor under stirring, and uniformly stirring to prepare the liquid band-aid. The liquid band-aid overcomes the defects that the traditional band-aid is not attractive, and the wound can not move freely. The liquid band-aid has the characteristics of being rapid in hemostatic effect, strong in inflammation diminishing and bacteria killing properties, and low in cost, and the wound part can move freely.

The invention discloses an intelligent overhead line fault positioning and monitoring system. The system is precise in fault positioning, high in precision and capable of quickly isolating faults, avoids long-time outage and improves operation reliability of a power grid. The intelligent overhead line fault positioning and monitoring system comprises a background server, a data collecting communication terminal, multiple fault indicators, a geographic information system and a distribution network automated system, wherein the background server, the data collecting communication terminal, the fault indicators, the geographic information system and the distribution network automated system are sequentially connected in a communication mode, and the geographic information system and the distribution network automated system are respectively connected with the background server. After a fault positioning and monitoring platform receives motion messages of the fault indicators, the geographic information system is accessed, all fault indicators which work and do not work on the same line are defined as upstream fault indicators and downstream fault indicators respectively, and a fault area is reduced to obtain a precisely positioned fault area by analyzing and determining the upstream fault indicators of a positioned fault area and the downstream fault indicators in the positioned fault area.

The invention relates to a fire blanket and laying device. The fire blanket and laying device is used for extinguishing and isolating a fire in a fire scene in the grassland, meadow, cornfield, wild flat land or the terrain with mild fluctuation and arranging an earth trail fire line. The fire blanket and laying device comprises a fire blanket and a fire blanket laying device, wherein the fire blanket consists of an inner layer and an outer layer; the outer layer is formed by soft flame-retardant cotton cloth or chemical fabric and a fire glass fiber material; the inner layer consists of fireproof ceramic fine powder; and the fire blanket laying device comprises traveling wheels, a remote controller, a rotating shaft, a receiving antenna, a transmitting antenna, a secondary variable frequency motor and a signal processor. The fire blanket and laying device has the flame-retardant temperature of over 1,000 DEG C, has light weight, is easy to fold, is harmless to the environment, is soft, has toughness, can rapidly cover the large-area fire scene and is particularly suitable for arranging a fire barrier in front of the fire scene.

An electronic device including an antenna is provided. The electronic device includes a first antenna radiator that resonates in a first band, a second antenna radiator that resonates in second and third bands higher than the first band, a third antenna radiator that resonates in the second and third bands, a communication circuit, a first feeding part electrically connecting the communication circuit and the first antenna radiator, a second feeding part electrically connecting the communication circuit and the second antenna radiator, and a third feeding part electrically connecting the communication circuit and the third antenna radiator. The communication circuit receives a signal in the second band while transmitting and receiving a signal in the second band by using the second antennaradiator and receives a signal in the third band while transmitting and receiving a signal in the third band using the third antenna radiator.

The invention discloses a W-waveband high power integrated synthesis frequency multiplication source. Ka-waveband signals are generated by Ku-waveband signals through active second harmonic generation, then equiamplitude opposition power distribution is achieved through a Ka-waveband balun, two branches of signals obtained after distribution are subjected to Ka-waveband power amplification and each drives a W-waveband passive frequency tripler in the corresponding branch, and after generated W-waveband signals are amplified, power synthesis outputting is conducted. According to the method for synthesizing the frequency multiplication source through W-waveband high power integration, the output power is boosted in the mode of power synthesis frequency multiplication, balanced amplitude and phase adjustment of power synthesis is achieved by adding a mechanical adjustment mechanism to a W-waveband power synthesis part, influence on the output power caused by unbalancedness between the two synthesis branches is reduced, and synthesis efficiency is improved. Meanwhile, an EBG structure is adopted in the Ka-waveband balun part so that cavity resonance suppression can be achieved, isolation among cavities is enhanced, and the stable integrated high-power output frequency multiplication source which covers the full W-waveband ranging from 75 GHz to 110 GHz is finally achieved.

The invention discloses a high-speed switching receiving radio frequency channel group delay consistency method, and aims to provide a group delay consistency method which is universal, stable, reliable and small in distortion. The method is realized through the following technical scheme: in a receiving channel group time delay consistency circuit, customizing a microwave radio frequency switch meeting time and reliability requirements of high-speed switching receiving radio frequency channel group time delay consistency, and controlling switching time errors and switching time of the microwave radio frequency switch to be consistent; when the signal passes through the channel first-stage mixer, setting any one received signal frequency to be converted to a middle filter center frequencypoint through a local oscillator frequency mixing rate; using an MCU to send a multi-channel high-speed switching control command and a second pulse control command to a synchronous signal processingunit through an I/O direct control line; and the time of the channel state switching control command arriving at all control switches being consistent, so that the signal on-off time difference between channels caused by the time difference of the control command is reduced, and the channel delay consistency is improved.

The invention provides a dedicated network selection method, a terminal, an access network node and a core network node, relates to the field of communication, and aims to solve the problems that the network signalling load is caused easily and isolation of a dedicated network is not facilitated due to low network selection efficiency in the existing dedicated network selection method. The dedicated network selection method comprises the following steps of obtaining identification information of a dedicated core network of the terminal; and, in a process of establishing air interface connection, sending an air interface message including the identification information of the dedicated core network to the access network node, so that the access network node establishes connection between the terminal and the dedicated core network according to the identification information of the dedicated core network. In the invention, the terminal side provides auxiliary information for selection of a dedicated network node; therefore, the access network node conveniently performs selection of the dedicated network node of the terminal; signalling transmission due to reselection of the network node is avoided; and thus, the isolation degree between different dedicated networks can be improved.

An antenna element (102) is provided with a first electricity-supplying port and a second electricity-supplying port, and is excited simultaneously through both the electricity-supplying ports so as to operate simultaneously as a first antenna section and a second antenna section, corresponding to each of the electricity-supplying ports. The antenna element (102) is excited by either a first frequency, or a second frequency that is higher than the first frequency. An antenna device is provided with: a slit (105) that generates isolation between the electricity-supplying ports; a trap circuit (106) that generates isolation at the slit (105) at the first frequency or the second frequency, when the antenna element (102) is excited by the first frequency or the second frequency; and a reactance element (107) that shifts the frequency at which the slit (105) generates isolation between the electricity-supplying ports to the first frequency, when the antenna element (102) is being excited by the first frequency.

The invention relates to a dabigatran etexilate medicine composition and a preparation method thereof. The dabigatran etexilate medicine composition consists of a pill I and a pill II, wherein the pill I contains an active ingredient, a blank pill core material, an adhesive, an anti-sticking agent and/or an isolation material, wherein the active ingredient is dabigatran etexilate or a pharmaceutically acceptable salt, hydrate or solvate thereof; and the pill II contains a medicinal organic acid, a pill core material, an adhesive, an anti-sticking agent and/or an isolation material. The discovery shows that the active ingredient and the organic acid are respectively contained in the two different pills, so that the requirement of dissolving out the active ingredient is satisfied, and the active ingredient is more uniformly dissolved out; and in addition, an isolation effect between the active ingredient and the organic acid is enhanced, so that the stability of the dabigatran etexilate medicine composition is improved.

The invention relates to the technical field of communication and radar, in particular to a W-band receiving and transmitting assembly. The W-band receiving and transmitting assembly comprises a local oscillator power splitter board, a transmitting chain, a receiving chain and a local oscillator chain. The W-band receiving and transmitting assembly further comprises a single-channel receiving module, a three-channel receiving module, an up-conversion module, a power synthesis module and a frequency multiplication module. All the modules are perpendicularly connected on the local oscillator power splitter board through waveguide interfaces. Due to the fact that all the modules are perpendicularly connected on the local oscillator power splitter board through the waveguide interfaces, the parasitic effect caused by packaging and interconnection is reduced. Due to the fact that all components in the functional module are arranged according to a three-dimensional structure and components in a radio frequency chain are perpendicularly connected with a power supply printing circuit board through insulators, isolation between a power supply and components is increased, and electromagnetic compatibility of the W-band receiving and transmitting assembly is improved. Meanwhile, different electronic components are installed in different cavity body layers, all components in the same layer are arranged in a planer hybrid integration mode, and miniaturization, integration and high reliability of the W-band receiving and transmitting assembly are achieved.

The invention provides an isolation circuit having a Hall element and can be applied to measuring equipment, e.g., an oscilloscope. The isolation circuit comprises a transformer, the Hall element, a constant current source, a first amplifier and a second amplifier, wherein an input signal is isolated through the transformer, a magnetic core of the transformer is provided with a notch, the notch is provided with the Hall element, the input signal is converted by the transformer into a high-frequency output signal, the Hall element induces magnetic flux of the magnetic core of the transformer to generate a low-frequency feedback signal, and the high-frequency output signal and the low-frequency feedback signal are processed through the second amplifier to generate signals after isolation. As the Hall element and a primary winding are not directly connected physically, the voltage isolation can be determined by the primary winding and a secondary winding of the transformer, the realized isolation is much higher than the isolation in the prior art, and thereby band width of the isolation circuit is greatly expanded.

The invention discloses a halogen-free flame retardant polyester material and a preparation method thereof. The halogen-free flame retardant polyester material is prepared from the following raw materials according to weight percent: 88%-94% of first polyesters and 6%-12% of flame retardant masterbatches, wherein the flame retardant masterbatches are prepared from the following raw materials according to weight percent: 50%-80% of polyethylene glycol modified polyesters and 20%-50% of a flame retardant. The halogen-free flame retardant polyester has a high flame retardant efficiency and is long in durability and good in hand feel or flexibility. The preparation method of the halogen-free flame retardant polyester material comprises the steps of mixing the polyethylene glycol modified polyesters with the flame retardant uniformly for extruding and granulating to obtain the flame retardant masterbatches, drying the flame retardant masterbatches, then blending the dried flame retardant masterbatches with the first polyesters for extruding and melt spinning, and winding the mixture to obtain the halogen-free flame retardant polyester material. The method is simple to operate and easy to control.

The invention relates to chemical chamfering technology and device using rotating spraying corrosive method that takes selective accurate corrosion to the power electronic component silicon surface. It lays the silicon slice on the basal, and spraying the acid liquid from the top of silicon sheet to downward after pulverization. The method includes the following steps: taking equal rotating to the silicon sheet, adsorbing the acid corrosive from acid storage tank, and spraying onto silicon sheet surface equally. Under the process of silicon sheet, water proof is set, and the top water spraying is set to start when acid spraying stopped. Bottom water spraying is set to supply at the same time with the rotating, and stop at the same time with top water spraying. Each service position processes one silicon sheet, and the acid, water alternatively work.

The invention discloses a medium voltage distribution network two wire closed loop operation wire connecting method comprising a first transformer substation and a second transformer substation. The medium voltage distribution network two wire closed loop operation wire connecting method is characterized in that the first transformer substation comprises a first main transformer and a second main transformer which are operated in parallel, a third main transformer and a fourth main transformer which are operated in parallel; the second transformer substation comprises a fifth main transformer, a sixth main transformer, and a seventh main transformer and an eighth main transformer which are operated in parallel; circuits from buses of two main transformer operated in parallel are connected with each other to form closed loop units. Transferring capacity between the closed loop units in the medium voltage distribution network can be flexibly configured according to power supplying reliability, flow distribution is simple and easy to be controlled, longitudinal differential protection is adopted in the medium voltage distribution network, so that N-1 is generated in the medium voltage distribution network and fault points can be rapidly separated to restore power supplement during the fault, and an equipped automatic system can be utilized to realize intelligentialization of switching operation, so that the switching operation can be utilized to restore power supplement during N-1-1 and N-2 faults; the medium voltage distribution network two wire closed loop operation wire connecting method is simple in structure and convenient to operate and implement.

The invention belongs to the field of crop fertilizers, and particularly relates to a special liquid pesticide-containing fertilizer capable of increasing yield, killing pests and degrading pesticide residues of potatoes and a preparation method thereof. The pesticide-containing fertilizer comprises microorganism flora, humic acids, nitrogen fertilizers, phosphate fertilizers, potassium fertilizers, boracic acids, pesticides, water soluble release agents and the like. The pesticide-containing fertilizer can kill pests as well as provide crops with nutrient substances which are absorbed through the leave surfaces of the crops, fast absorption by the leave surfaces causes difficult loss of nutrient substances, and microorganism flora can increase the photosynthesis of the crops to promote the absorption to the nutrient substances, improve the output of the crops, degrade the pesticide residues and the like.

The invention relates to the technical fields of communication and radar, in particular to a power combining module which is used for a W-waveband transceiver assembly. The power combining module comprises an upper power amplifier module and a lower power amplifier module which are identical in structure and are arranged symmetrically, and an interlayer cavity which is arranged between the upper power amplifier module and the lower power amplifier module. The interlayer cavity comprises a waveguide structure. Each of the upper power amplifier module and the lower power amplifier module comprises a cavity, a power amplifier printed circuit board arranged in the cavity, and a radio-frequency link and insulators which are arranged on the front surface of the cavity. The power amplifier printed circuit board is vertically connected with the radio-frequency link through the insulators. All the devices in the power combining module disclosed by the invention are arranged in a three-dimensional structure, the devices in the radio-frequency link are vertically interconnected with the power amplifier printed circuit board through the insulators, the separation of a power supply from the devices is enhanced, electromagnetic compatibility of the module is improved, and the stability and the reliability of the power combining module are ensured. Different electronic devices are installed in different cavity layers, and the different electronic devices are vertically interconnected through the insulators. The devices on the same layer are arranged in a planar hybrid integration manner, and the miniaturization and integration of the power combining module are realized.

The invention discloses a filter duplex antenna based on an open-loop resonator. The filter duplex antenna comprises a rectangular patch with a short-circuit post loaded in the middle, a stacked parasitic rectangular patch, a transmitting channel feed probe, a receiving channel feed probe, a reflective floor, a transmitting port, a receiving port, a transmitting channel feed network, and a receiving channel feed network. The rectangular patch is printed on an upper surface of an intermediate dielectric substrate; the stacked parasitic rectangular patch is printed on an upper surface of an upper dielectric substrate; the reflective floor is printed on an upper surface of a lower dielectric substrate; and the transmitting channel feed network and the receiving channel feed network are printed on the lower surface of the lower dielectric substrate. According to the filter duplex antenna, with introduction of the open-loop resonator as a feed network, the antenna has a filter duplex function and is capable of carrying out transmission and receiving simultaneously; and electromagnetic waves transmitted and received by the antenna are linear-polarization electromagnetic waves.