700results about How to "Shorten the transmission path" patented technology

Provided is a semiconductor memory module capable of decreasing a parasitic capacitance and a parasitic inductance which are incidental to a signal transmission path, thereby reducing a distortion of a signal waveform. In a memory module, four DRAMs are provided on a muttilayer printed circuit board in one line corresponding to a direction of arrangement of external terminals thereof and board terminal groups of the module are provided to make a pair along two long sides of the multilayer printed circuit board. The DRAM has external terminals extended from one of the long sides and external terminals extended from the other long side. Board terminals and board terminals in the board terminal group of the module are connected to the DRAM, and board terminals and board terminals in the board terminal group TGB of the module are connected to the DRAM.

The invention provides a linear voltage stabilizing circuit with low voltage difference. The linear voltage stabilizing circuit with the low voltage difference is provided with high power supply rejection ratio and comprises an error amplifier, a buffer circuit, a P-channel metal oxide semiconductor (PMOS) regulating transistor, a compensation circuit, a voltage division feedback circuit and an output circuit. The error amplifier is a novel error amplifier. Ratio of width to length ratio of a fifth PMOS tube and a sixth PMOS tube, ratio of width to length ratio of a seventh PMOS tube and an eighth PMOS tube and ratio of width to length ratio of a ninth N-channel metal oxide semiconductor (NMOS) tube and a tenth NMOS tube are all 1: K, and K is an integer greater than 1. The ratio of width to length ratio of the metal oxide semiconductor (MOS) tubes is changed, resistance of an output node of the error amplifier to a power supply is reduced, power interference enters from a current mirror low resistance point is amplified through current amplification technology, and power supply high frequency small signal interference in output signals of the error amplifier cannot be attenuated excessively. Therefore, the linear voltage stabilizing circuit with the low voltage difference enables power supply interference signals arriving at a PMOS regulating transistor grid to be varied according to variation of power supply voltage well, and improves the power supply rejection ratio of circuits.

The invention provides a dual power coupling drive assembly adopting a dual-motor rotating speed coupling drive mode, and the dual power coupling drive assembly can meet the power demands of heavy vehicles in the process of running. In the invention, the rotating speed coupling of a planetary gear is used as the power coupling of a first motor 4 and a second motor 8; the first motor 4 and the second motor 8 are arranged at the same side, and the shafts of the first motor 4 and the second motor 8 are parallel to each other, the power output by the first motor 4 passes through a first speed reducer 3, a power input gear 2 and a gear ring external gear 12, the power output by the second motor 8 passes through a second speed reducer 9 and a sun gear 11, then the rotating speed coupling of the two motors are realized by the planetary gear, and a planet carrier 15 outputs power to a driving wheel 16.

The invention relates to a carbon-based composite electrode material and a preparation method thereof, and application of the carbon-based composite electrode material to a super capacitor. The electrode material contains a conductive polymer and a carbon-based material. The conductive polymer is attached to a surface of the carbon-based material in a manner of a nanowire array of a conductive polymer, wherein the arrangement of the nanowire array of the conductive polymer is in a good order; besides, a diameter of the nanowire of the nanowire array of the conductive polymer is 40 to 100 nm and a length of the nanowire is 100 to 1500 nm. The carbon-based composite electrode material provide in the invention has a large specific surface area, so that an active area of a conductive polymer is substantially improved and thus high capacitance can be obtained; besides, the carbon-based composite electrode material provide in the invention has a highly ordered nano structure, so that a transmission path of an electrolyte ion is reduced and an internal resistance of an electrode is also reduced; therefore, the ion in an electrode material can be diffused and transmitted conveniently, and thus high power density can be obtained.

The invention provides a flexible supercapacitor. The flexible supercapacitor comprises a housing, two electrodes facing each other and separated with each other, and electrolyte between the two electrodes. The two electrodes facing each other and the electrolyte between the two electrodes are accommodated in the housing. The supercapacitor is characterized in that the electrodes are composed of a conducting polymer and a carbon-based material, and the conducting polymer attaches to a surface of the carbon-based material in a form of a nanowire array of the conducting polymer. The invention also provides a preparation method for the flexible supercapacitor. The flexible supercapacitor prepared by the method has high capacitance, good charge-discharge cycling stability, and is low in cost and simple in preparation technology.

The invention belongs to the technical field of lithium sulfur batteries, specifically relates to a sulfur-carbon composite material with a nitrogen-doped porous carbon nanofiber net-shaped structure, as well as a preparation method and an application of the composite material. By taking a polypyrrole net-shaped structure which is synthesized by virtue of a soft template method as a raw material, taking the potassium hydroxide as a pore forming agent, and taking the nitrogen-doped carbon nanofiber net-shaped structure which is synthesized through high-temperature carbonization under nitrogen atmosphere and is in a porous structure as a precursor, the sulphur-carbon composite material which can be used as the anode of the lithium sulfur battery can be prepared through heat treatment with elemental sulfur. The preparation method provided by the invention is simple, and good in reproducibility, and the prepared composite material is uniform in structure distribution, and can be used as the anode of the lithium sulfur battery. Due to the nitrogen doping and the tridimensional net-shaped structure, for the material, the conductivity can be improved, a transmission path of lithium ions is shortened, meanwhile, the dissolving of the sulfur and intermediate product in an electrolyte can be prevented, the electrochemistry performance of a positive material of the lithium sulfur battery is improved, good specific discharge capacity, cycle performance and rate performance can be achieved.

A brush DC motor with reduction mechanism includes: a brush DC motor including a motor case, a stator section and a rotor section having a substantially cylindrical core, the stator section and the rotor section being received in the motor case; and a first reducing section drivable by the motor. The first reducing section includes a first sun gear, an external ring gear positioned around the sun gear and several planetary gears held between the external ring gear and the sun gear and engaged with the sun gear and the external ring gear. The first reducing section further includes a planetary carrier for locating the planetary gears in their true positions. Multiple parallel linear splines are formed on a circumference of the core at intervals. One end of the core with the splines formed on the circumference of the end serves as the sun gear of the first reducing section.

The invention discloses a multi-node synchronous sampling and data transmission method in a ring communication network. The main node generates a synchronous pulse AD _ CVT and a transmission triggerpulse TX _ SYN which are consistent with a system sampling interval Ts, and meanwhile, the main node completes local real-time data collection under the control of the AD _ CVT and completes data transmission under the trigger of a TX _ SYN signal; meanwhile, each control node divides a physical channel into a real-time logic channel and a non-real-time logic channel, real-time sampling data services are classified into the real-time logic channels to be transmitted, real-time sampling data are extracted in a staggered mode and sent out from two different directions of the ring network, and non-real-time data are classified into the non-real-time logic channels to be transmitted. According to the method, synchronous sampling and synchronous data transmission of each control node in the ring network are realized, and the data sampling efficiency and the data transmission instantaneity are improved.

With an appropriate signal transmission form, a drive pulse output circuit is mounted to an ink jet head, so that waveform distortion of an actuator drive pulse for jet of ink drops is inhibited or prevented. Modulated signal data in memory is read to output a modulated signal, which is power-amplified by a digital power amplifier. The amplified digital signal is smoothed to be output to an actuator as a drive pulse. As a result, the digital power amplifier having high amplification efficiency efficiently amplifies the power of the modulated signal, thereby eliminating the need to use a cooling unit. The drive pulse output circuit can be mounted to the ink jet heads, thereby shortening the transmission path of an actuator drive pulse, which inhibits or prevents any waveform distortion of the drive pulse. The transmission of the modulated signal data DATA is implemented with a low frequency.

The invention discloses a method for preparing a manganese dioxide/mesoporous carbon nanometer graded composite electrode material. The method includes the steps of taking manganese sulfate and ammonium persulfate as reactants, preparing sea-urchin-shaped manganese dioxide with a certain hollow structure through a hydrothermal method, then, taking phenolic resin and ethyl orthosilicate as a precursor of carbon and a precursor of silicon dioxide respectively, taking F127 as a constitution controller, combining ordered mesoporous carbon with the manganese dioxide together through volatilization self-assembly and carbonization, and finally removing silicon dioxide nanometer balls from the material through a sodium hydroxide aqueous solution to obtain the manganese dioxide/mesoporous carbon nanometer composite material with the graded structure. When the material is used as a supercapacitor electrode material, the specific capacity of the material is about one time larger than the specific capacity of the pure manganese dioxide, the test result shows that the composite material integrates the high conductivity of carbon materials and the high specific capacity of the manganese dioxide, the rate performance and the circulation stability of the material are improved, and excellent electrochemical performance is embodied.

The invention provides a method and device for transmitting data between a main control panel and a service panel, wherein the method comprises the following steps of: obtaining user request data; sending the user request data to a kernel mode through a system calling communication mechanism; sending a user request message to a service panel kernel mode through a communication mechanism between kernel mode panels; establishing a netlink server when an operation type is a read operation; sending received response data to the netlink server side through a netlink client; returning to a user mode program by the netlink server side after receiving the response data; and analyzing the response data by the user mode program, and forming a user understandable form displayed to users. Due to adoption of the method provided by the embodiment of the invention, a main control panel user mode program can directly read data from a service panel kernel mode program effectively in real time.

The invention discloses a lithium ion battery film cathode containing a porous polymer elastomer, which comprises a copper foil current collector and a surface coating, wherein the surface coating is uniformly coated on the surface of the copper foil current collector; and the surface coating is formed in a way that a high-capacity nano particle is compounded in a directional porous polymer elastomer. The high-capacity nano particle is loaded in a hole of the porous polymer elastomer through suction filtration, rolling and electrophoresis and coated on the copper foil current collector. The porous polymer elastomer is one of porous polythiophene, porous polypyrrole or porous polyaniline. The film cathode prepared in the invention can effectively prevent the high-capacity nano particle from causing pulverization due to volumetric expansion and causing capacity attenuation due to secondary agglomeration in charge and discharge processes, and improves the circulation property of the nanoparticle. Meanwhile, the porosity of the polymer can ensure rapid transmission of lithium ions in the cathode, thereby achieving the purpose of being rapidly charged and discharged. The cathode prepared in the invention can be directly used in battery assembly without tabletting or filming, and is suitable for industrialized production.

The invention provides a lithium metal oxide composite positive electrode material with a multilayer structure, a precursor material for constituting the same, and a preparation method and an application for the precursor material. The invention relates to the lithium metal oxide composite positive electrode material used for a lithium ion battery, and a preparation method and an application for the lithium metal oxide composite positive electrode material. The invention aims to solve the ubiquitous problems of low specific capacity, bad cycling performance, high improvement cost and low tap density existing in the lithium metal oxide composite positive electrode material. According to the preparation method, primary granules are controlled in real time to be arranged based on layers in a coprecipitation method reaction process by enabling metal salt solution components to be subjected to stage changes and cease type overflowing; the metal salt components of the primary granules in each layer are different; a precursor of the high-performance lithium metal oxide composite positive electrode material with the multilayer structure is obtained; and the lithium metal oxide composite positive electrode material with the multilayer structure is finally synthesized by the combination of a gradient temperature rise way. The lithium metal oxide composite positive electrode material is used for the lithium ion battery.

The invention belongs to the field of radar antenna control, and provides a single-pole double-throw switch for radio frequency transceiving switching. The switch comprises two microstrip lines and aswitch tube core, wherein one end of a first microstrip line is connected with an antenna, and the other end of the first microstrip line is connected with a PA output matching end; one end of a second microstrip line is connected with the antenna, and the other end of the microstrip line is connected with both an LNA input matching end and a drain of the switch tube core Q4; and a source of the switch tube core Q4 is grounded, an inductor L is connected between the drain and the source in parallel, and a gate is a control end. Compared with the traditional single-pole double-throw switch in which two switch tube cores are connected in parallel and grounded and connection statuses of the two switch tube cores are different, the switch provided by the invention has the advantages that the number of switch transceiving control voltages is reduced, and an original control switch in a transmitting circuit and a 1/4 wavelength microstrip line connected with the control switch are removed, so that a switch path is simplified, a transmission route for transmitted signals is shortened, the size is reduced, the problem of transmitting power back-off is effectively avoided, and insertion loss of a transmitting output end is further reduced.

The invention relates to a distributed system monitoring method stepping over a data center cluster and a system. The system has a multilayered distributed framework and comprises a business layer, a supporting layer and a monitoring framework; the monitoring framework consists of a business end, a control end, a collecting end and a monitoring end; the business layer comprises two function objects such as the business end and the control end; and the supporting layer comprises two function objects such as the collecting end and the monitoring end. The monitoring framework is managed in a unified manner, is opened stably, is used for cloud computing and steps over a plurality of data centers.

The invention relates to a lithium-sulfur battery positive pole material and a preparation method thereof, and belongs to the technical field of battery materials. The provided positive pole material has abundant micropores and mesopores; porous nano carbon thin sheets with a three-dimensional communicated net structure are taken as the skeleton; nano sulfur dots are filled into the pores of the net structure, and the outer layer of the skeleton is wrapped by reduced oxidized graphene. The preparation method comprises the following steps: mixing porous nano carbon thin sheets with a sulfur single substance, subjecting the mixture to ball milling, carrying out reactions at a temperature of 180 to 200 DEG C in an enclosed environment in the absence of oxygen and water under the protection of inert gas to obtain a porous nano carbon thin sheet/nano sulfur compound; dissolving the compound into an ethanol solution, dispersing the compound by ultrasonic waves, adding oxidized graphene, adjusting the pH to 10.1 by ammonia water, carrying out ultrasonic dispersion, carrying out hydrothermal reactions at a temperature of 80 to 100 DEG C, filtering, washing the reaction product until the reaction product becomes neutral, and drying to obtain the positive pole material. The positive material has the advantages of high specific capacity and stable electrochemical circulation performance, moreover, the preparation method is simple, the price is low, and the positive material is environment-friendly and can be easily produced in batches.

The invention relates to the field of a lithium-ion battery negative material, and particularly discloses a graphene/metal oxide composite negative material of a lithium ion battery and a preparation method of the material. The method comprises the following steps of: S1, placing the metal oxide negative material into a tin salt acid aqueous solution, and stirring at a constant temperature; S2, filtering the mixture, obtaining the solid matters, and washing the solid matters through water; S3, placing the solid matters which are treated in the S2 into a graphene turbid liquid and stirring; S4, centrifugally separating the substance obtained in S3, and drying a centrifugal substrate to obtain a product. The method is simple in preparation process and applicable to the industrialized production, and the graphene and the metal oxide in the prepared graphene/metal oxide composite negative material are closely compounded.

The invention discloses a preparation method of a graphene/stannic oxide quantum dot composite electrode material for a lithium ion battery. In the sample preparation process, that graphene-supported stannic oxide quantum dots are synthesized under relatively mild experiment conditions by utilizing a wet chemical method, and urea is adopted as a reducing agent to reduce graphite oxide, so that the preparation method has the advantages of simple and controllable reaction conditions and low production cost; by introducing graphene, not only can the conductivity of the composite material be improved but also volume change in the stannic oxide charge-discharge process can be effectively buffered; therefore the composite material shows good cycling stability.

The invention provides a prussian blue positive pole material and a preparation method thereof, and an electrochemical energy storage device. The molecular formula of the positive pole material is AxMc[M'(CN)6]y, wherein the A is one or more of H<+>, Li<+>, Na<+>, K<+> and NH4<+>, the M is transition metal, and M' is also the transition metal, 0 < x <= 2, 0 < y < 1, and 0 < c <= 1. The positive pole material has a porous structure and a high specific surface area, so that the diffusion and transmission path of ions and electrons can be obviously shortened, both the ion and electron conductiveproperties of the electrochemical energy storage device can be enhanced, and therefore, the cycle performance and rate performance of the electrochemical energy storage device can be improved; and thecontact with a conductive agent can be also increased, the electron conductive properties of the electrochemical energy storage device can be further enhanced, and the cycle performance and rate performance can be further improved as well.

The invention provides a composite negative electrode and a preparation method thereof as well as a lithium battery. The composite negative electrode comprises one layer or more than two layers of porous current collectors which are combined in a laminating manner, wherein holes of the porous current collectors are filled with active fillers; the active filler contains a binding material, a conductive agent and an active substrate having lithium ion implanting capability; the weight of the active substance accounts for 80-98% of the total weight of the active filler. The preparation method of the composite negative electrode comprises preparation of sizing agents containing the active substances and injection of the sizing agents. The lithium battery contains the composite negative electrode. The composite negative electrode has stable volume and is high in capacity; the preparation method is simple in process and high in production efficiency, conditions are easy to control, and production cost is reduced. The lithium battery has large-current charge and discharge characteristics and also has characteristics of high specific energy and power.

The invention relates to a lithium phosphate coated lithium iron phosphate electrode and a preparation method thereof, belonging to the technical field of electrode materials for lithium secondary batteries. The surface of the lithium iron phosphate electrode is coated with nanoscale glassy state lithium phosphate. The electrode preparation method comprises the following steps of: mixing lithium phosphate powder and an organic solvent, carrying out ball-milling on the mixture to form pulp, drying the pulp to obtain powder, compacting the powder into a lithium phosphate target precursor, and then calcining to obtain a lithium phosphate target; carrying out magnetron sputtering on lithium iron phosphate electrode (serving as substrate) and the lithium phosphate target to obtain the lithium phosphate coated lithium iron phosphate electrode, wherein the distance between the target and the substrate is 4-8cm, and the background intensity of pressure is less than or equal to 10*10<-5>Pa. The electrode has high lithium-ion conductivity, and also the capacity of the electrode is improved; the coated lithium phosphate has good chemistry and electrochemical stability and can be used for protecting the stability of the electrode structure; the preparation method is simple and low in cost; and the large-scale production is easy to realize.

A circuit board assembly having at least a passive component and a stack structure of the circuit board are disclosed, including: a carrier board formed with a through opening for receiving a semiconductor component having an active surface on which electrode pads are formed; a dielectric layer formed on the carrier board and the semiconductor component and formed with openings to expose the electrode pads; a circuit layer formed on the dielectric layer and having conductive structures formed in the openings of the dielectric layer for electrically connecting the electrode pads, and a plurality of lands for mounting at least one passive component electrically connected to the circuit layer; and a circuit build-up structure formed on the dielectric layer, the circuit layer and the passive component, with conductive structures formed for electrically connecting the circuit layer.