853results about How to "Shorten the transmission distance" patented technology

A wireless ad-hoc network for transmitting packets to target regions, and a packet transmission method thereof, are provided. The ad-hoc network includes at least one relay node for receiving a packet containing location information of at least two target regions each including at least one node, separating the received packet by the location information, forming a new packet for each instance of the location information separated from the received packet, and forwarding the new packets to corresponding target regions; and a source node for generating the packet containing the location information and transmitting the packet to the relay node. The present invention can reduce the packet transmission overhead, the packet transmission delay, and the power required for the packet transmission. Therefore, the packets can be delivered to the target regions in an efficient manner.

A stacked package includes a substrate, a first die, at least one signal transmission plate, at least one second die, a plurality of conductive wires, and a molding compound. The first die is electrically connected with the substrate using flip-chip bonding. The signal transmission plate is provided on the first die and includes an insulating layer, a layout wire layer, and a solder mask layer. The layout wire layer is formed on the insulating layer, and the solder mask layer is formed on the layout wire layer. The solder mask exposes partial area of the layout wire layer at the center and peripheries of the signal transmission plate to form a plurality of die bonding pads and a plurality of wire bonding pads. The second die is electrically connected with the die bonding pads using flip-chip bonding, and the wire bonding pads are electrically connected with the substrate via the conductive wires so that the signals from the second die are transmitted to the substrate. In addition, the molding compound is used to encapsulate the first die, the signal transmission plate, the second die, and the conductive wires.

In a passive optical network system, in order that by measuring a transmission distance and a transmission time between an OLT and an ONU in operation of the system, if the distance or the time is short, communication is conducted at a high transmission speed to increase a capacity of user; if the distance or the time is long, communication is conducted at a low transmission speed to increase the capacity of user communicating in a state in which a predetermined quality is secured, a main station includes a signal communication circuit to communicate with subsidiary stations at a first or second transmission speed and a controller to measure a transmission distance or a transmission time between the main station and each subsidiary station. Based on a result of the measurement, the controller selects a transmission speed for communication with the subsidiary station.

The invention discloses a molybdenum disulfide / carbon composite material. The molybdenum disulfide / carbon composite material comprises a molybdenum disulfide layer and a carbon hollow ball, wherein the molybdenum disulfide layer is positioned outside the carbon hollow ball; and the carbon hollow ball has a hollow structure. The invention also discloses a preparation method of the molybdenum disulfide / carbon composite material. The preparation method comprises the following steps of using amino modified silica spheres as a template; wrapping the template by pyrolyzation of an organic carbon source; performing thermal reaction on the template and ammonium tetrathiomolybdate through solvent; performing high-temperature carbonization in an inert atmosphere; and removing the silicon oxide template to obtain the molybdenum disulfide / carbon composite material. The lithium-intercalation capacity of the molybdenum disulfide / carbon composite material is 1467mAh / g for the first time, and the specific capacity of the molybdenum disulfide / carbon composite material can be kept at 733mAh / g after 30 times of repeated charging and discharging cycles.

An assembly package includes a substrate, a first die, at least one signal transmission plate, at least one second die, a plurality of conductive wires, and a molding compound. The first die is electrically connected with the substrate using flip-chip bonding. The signal transmission plate is provided on the first die and includes an insulating layer, a layout wire layer, and a solder mask layer. The layout wire layer is formed on the insulating layer, and the solder mask layer is formed on the layout wire layer. The solder mask exposes partial area of the layout wire layer at the center and peripheries of the signal transmission plate to form a plurality of die bonding pads and a plurality of wire bonding pads. The second die is electrically connected with the die bonding pads using flip-chip bonding, and the wire bonding pads are electrically connected with the substrate via the conductive wires so that the signals from the second die are transmitted to the substrate. In addition, the molding compound is used to encapsulate the first die, the signal transmission plate, the second die, and the conductive wires.

A sulfur electrode, and preparation and application thereof. The sulfur electrode comprises a sulfur / carbon composite, a conductive agent and a binder, wherein the sulfur is an electrode active material. The content of sulfur / carbon composite in the electrode is 10-95%; a mass ratio of sulfur to porous carbon material in the sulfur / carbon composite is 1:0.05-19; the porous carbon material in the sulfur / carbon composite has conductivity greater than or equal to 0.1S / cm, specific surface area greater than or equal to 500 m<2> / g, and pore volume greater than or equal to 0.3cm<3> / g; and the pore structure comprises microporous and mesoporous. The porous carbon material is treated by an acid modification method, in which a mass fraction of acid is 1-50%. The sulfur electrode prepared by the method provided by the invention has advantages of high specific energy, excellent cycle stability, cheap and easily available electrode material, and simple and practical preparation method, and can be applied to a secondary battery.

One problem faced by contact center providers is how to most effectively balance limited contact center resources against the need to provide good customer service. The present invention addresses this problem by enabling a contact center to use external resources such as freelance contact center agents and media servers. This is achieved in such a way that those external resources are controlled by the contact center and their use is effectively transparent to end users of the contact center.

The invention discloses a T / R assembly integrated air tightness packaging structure resistant to overload. The T / R assembly integrated air tightness packaging structure resistant to overload comprises a cylindrical shell, a groove used for containing an antenna is formed in one end of the shell, the other end of the shell is provided with a cavity used for containing a signal processing unit, and the cavity is sealed by a cover board. An installation hole used for installing a microwave insulator is reserved in the portion, clamped between the groove and the cavity, of the shell and the microwave insulator is arranged in the installation hole through eutectic welding. Wires on the two sides of the microwave insulator are connected with the antenna and a signal processing unit substrate respectively. According to the T / R assembly integrated air tightness packaging structure resistant to overload, miniaturization and integration of a radio frequency / microwave T / R assembly are achieved. The microwave insulator is sintered on the metal shell in a gold-tin eutectic welding mode and matched with parallel seam welding (or laser welding) air tightness packaging, the sealing performance of a cavity of the signal processing unit can be guaranteed, and the reliability of the assembly can be improved. Transmission between the sending / receiving antenna and the signal processing unit is conducted through the microwave insulator, the transmission distance is shortened, and the microwave characteristic of a circuit is improved.

The present invention relates to a method for detecting phenol compounds in a water body environment through an enzyme electrochemical biosensor. The biological sensor detection apparatus comprises a working electrode, an auxiliary electrode, a reference electrode, a detection cell and an electrochemical workstation. The specific operation steps comprise: adding a hydrophilic ionic liquid (such as 1-butyl-3-methylimidazolalanine and BMIM [Ala]) to a mesoporous carbon solution, and shaking for half an hour to obtain a novel mesoporous carbon and hydrophilic ionic liquid composite material; adding tyrosinase to the mesoporous carbon and hydrophilic ionic liquid composite material solution, shaking for one hour, and adding the obtained solution to the surface of a working electrode in a dropwise manner to obtain a tyrosinase immobilized working electrode; and inserting the tyrosinase immobilized working electrode, the auxiliary electrode and the reference electrode into a detection cell filled with a phosphate buffer solution, and adding a single standard substance of a phenol compound under a stirring condition to produce a corresponding current response signal.

The invention discloses an erasure code based failure data linear restoration method for the purpose of designing a failure data restoration method aiming at erasure code characteristics. The scheme involves constructing a distribution storage system composed of a control node and N storage nodes. The control node is provided with a task management program and a result recovery program and the storage nodes are provided with restoration programs; the task management program selects a new storage node LN for a failure data block; an available data block is selected from available data blocks of a data object to construct a linear restoration path; the restoration programs perform decoding calculating and transmit and merge decoding results along the linear restoration path; and the restoration program of the LN receives a decoding calculation result from the last storage node of the linear restoration path, and the result recovery program receives the restoration success information of the LN. By using the method provided by the invention, the bottleneck bandwidth in a network can be effectively avoided, the transmission distance of data restoration is shortened, the bandwidth cost of failure data restoration is reduced, and the restoration efficiency of failure data is improved.

The invention belongs to a gyro calibrator and discloses a three-shaft high-low temperature speed turntable adaptable to high and low temperature ranges. The turntable comprises a turntable base, an outer frame, a middle frame, an inner frame, driving shafts of the outer frame, the middle frame and the inner frame, and a driving motor, wherein the outer frame has a U-shaped structure, the driving shaft of the outer frame is arranged in the turntable base; the turntable also comprises a temperature box, the outer frame, the middle frame and the inner frame are arranged in the temperature box, and a base plate of the temperature box is provided with a shaft hole which allows the driving shaft of the outer frame to pass through; the middle frame and the inner frame are standard positive circular ring shaped; and the wall of the temperature box is provided with a glass window. The three-shaft high-low temperature speed turntable has the advantages that tests on a gyro in three directions in a high temperature environment and a low temperature environment can be performed simultaneously, and the turntable has low requirement on the motor moment and has high test efficiency.

The invention discloses a potassium-sodium-manganese-iron-based Prussian-blue electrode material, and a preparation method and application thereof, belonging to the technical field of synthesis of new-energy materials. According a technical scheme in the invention, the potassium-sodium-manganese-iron-based Prussian-blue electrode material has a general chemical formula of K<x>Na<y>MnFe(CN)<6>, wherein x and y are both more than 0 and less than 2; and the material has a cubic structure and a particle size of 10 to 200 nm. The invention also discloses the preparation method for the potassium-sodium-manganese-iron-based Prussian-blue electrode material and application of the material to the positive electrode of a sodium-ion battery. The potassium-sodium-manganese-iron-based Prussian-blue electrode material prepared in the invention has the cubic structure and a particle size of 10 to 200 nm; the nanometer three-dimensional structure of the material leads to increase in the specific surface area of the material and effective reduction in transfer distance of ions or electrons in the electrode material, so the rate performance and cycle stability of the electrode material are improved; and the electrode material has excellent electrochemical performance as a positive electrode material for the sodium-ion battery.

A preparation method of a high-capacity monocrystalline type ternary cathode material comprises steps as follows: S1, a nickel cobalt manganese hydroxide precursor of a core-shell structure is prepared with a coprecipitation method, a loose and porous core is prepared by intermittently introducing a certain quantity of bicarbonate at the initial stage of core making, after core making ends, and loose flaky shells are prepared by substantially reducing the rotation speed and increasing pH; meanwhile, at the core-shell transition stage, a dispersant is added to effectively prevent agglomerationof the shells due to decrease of the rotation speed; S2, the prepared precursor and lithium salt are mixed and calcined once in the oxygen-rich atmosphere at the high temperature, and the monocrystalline type ternary cathode material is obtained. A battery is prepared from the ternary cathode material and has high capacity and good safety performance due to high lithium ion transport efficiency and reduced anisotropy in crystals. The problem of poor capacity of the material because of low lithium ion transport efficiency of monocrystalline type ternary materials is effectively solved. Besides,the monocrystalline type ternary cathode material is prepared through one-time sintering, the preparation procedure is simple, and the production cost is low.

The invention provides a three dimensional gradient metal hydroxide / oxide electrode material and a manufacturing method and application thereof. The three dimensional gradient metal hydroxide / oxide electrode material consists of a conductive substrate and a metal compound layer, wherein the metal compound layer is arranged or formed on the surface of the conductive substrate, and the metal compound layer is made of metal hydroxide or oxide; the metal is transition metal, and the content of the metal ions in the metal compound layer decreases or increases in a gradient manner towards the conductive substrate. The three dimensional gradient metal hydroxide / oxide electrode material has the advantages of good cycling performance and good rate capability. The method for manufacturing the three-dimensional gradient metal hydroxide / oxide electrode material is easy and convenient, and the three dimensional gradient metal hydroxide / oxide electrode material can be used for manufacturing electrodes and batteries directly and shows good electrochemical activity.

The invention relates to a method and system for reducing website access time delay by using caches in fog computing architecture. On the premise of not influencing normal running of a cloud data center website, fog nodes are used for caching static resources in a local area network to reduce the time delay of user access and improve the user experience. In the method and system, hot resources with the request quantity exceeding a threshold value set by the system are subjected to multi-copy caching in multiple fog nodes; when the resources need to be read, the most suitable fog node is selected to provide services according to the load balancing algorithm; cache management nodes are set to conduct record management on meta information of system cache resources.

The invention discloses a dye sensitized solar cell, which comprises an optical anode, a counter electrode, electrolyte and a packaging shell. The counter electrode is positioned above the optical anode and is arranged inside the packaging shell; the electrolyte is full of the packaging shell; the optical anode comprises a transparent conductive substrate, a transparent conductive film and a porous transition metal oxide film which adsorbs dye molecules; the porous transition metal oxide film is coated on the transparent conductive film; and the counter electrode comprises a diaphragm serving as a substrate of the counter electrode, and a catalytic material and a grid electrode which are deposited on the diaphragm in turn. The invention also discloses a method for preparing the dye sensitized solar cell. The invention reduces the manufacturing cost, lightens the cell weight, reduces the short circuit risk and shortens the electronic transmission distance, and the dye sensitized solar cell is high-efficiency.

The present invention provides a high-power medium-voltage drive power cell, which comprises: a rectifier module for rectifying the three-phase AC input voltage to get a DC voltage; an IGBT (Insulated Gate Bipolar Transistor) inverter bridge connected to capacitors for converting the DC voltage into an AC voltage of which the frequency, the amplitude and the phase are adjustable; a bypass module connected to the IGBT inverter bridge for providing the bypass function when the IGBT inverter bridge works in an abnormal state; and a heat pipe heat sink having a base plate on both sides of which power elements of the high-power medium-voltage drive power cell are disposed.

A wireless ad-hoc network for transmitting packets to target regions, and a packet transmission method thereof, are provided. The ad-hoc network includes at least one relay node for receiving a packet containing location information of at least two target regions each including at least one node, separating the received packet by the location information, forming a new packet for each instance of the location information separated from the received packet, and forwarding the new packets to corresponding target regions; and a source node for generating the packet containing the location information and transmitting the packet to the relay node. The present invention can reduce the packet transmission overhead, the packet transmission delay, and the power required for the packet transmission. Therefore, the packets can be delivered to the target regions in an efficient manner.

This invention relates to a neuron network runner dual-pole plate used in PEM fuel batteries, one side of the pole plate is set with a cathode flow field for transmitting oxidizer gas, the other side is set with anode runners for transmitting fuel, inlets and outlets of gas and cooling fluid are set on the pole plate, a flow field transition region and a flow field reaction region set in it and connected with it are placed near the gas inlet / outlet, in which, the runners of the transition region are in the structure of a multi-channel neuron network., the length of runners in the field and the flowing resistance of gas in the runners are almost the same so it is favorable for gas flowing in the field uniformly.

The invention provides a positron emission tomography (PET) detector, a method for setting the PET detector and a detecting method thereof. The PET detector comprises the components of a crystal array which comprises a plurality of crystal units that are arranged in an array manner and light splitting structures that are arranged on the surfaces of the crystal units, wherein the light splitting structure define the light outlet surface of the crystal array; and a semiconductor sensor array which is arranged relative to the light outlet surface of the crystal array and is suitable for receiving photons from the light outlet surface, wherein the semiconductor sensor array comprises a plurality of semiconductor sensors which are arranged in an array manner. Through arranging the light splitting structures on the crystal units, an effect which is similar with the effect obtained through arranging a light guide plate between the crystal array and the semiconductor sensors is realized. The transmission distance of the photon can be effectively shortened, and furthermore light transmission loss caused by the light guide plate can be prevented, thereby improving resolution of the PET detector.

The invention belongs to the field of new energy sources, and particularly relates to a carbon coated SnS2 composite material as well as a preparation method and application thereof. The invention provides the carbon coated SnS2 composite material which has a hollow shell-core structure; the shell is a hollow carbon shell; the inside is SnS2 nanometer sheets; a space gap is reserved between the SnS2 and the hollow carbon shell. The material can be applied to lithium ion batteries or sodium ion batteries or potassium ion batteries when being used as a negative electrode material.

The invention relates to a radiating substrate based on a diamond film, comprising a silicon substrate, the diamond film and a transition layer, wherein the diamond film prepared on the silicon substrate has a diamond-on-silicon (DOS) structure; after an end-sealing top layer is removed and surface planarization is carried out, the roughness of the surface of the diamond film is at the nano orderand surface modification is carried out; and the transition layer is a Ti film, and is firstly deposited on the diamond film with a modified surface before metal bumps are prepared. The radiating substrate has the advantages that the diamond film with highest heat conductivity is adopted as a radiating layer of the LED (light-emitting diode) base to form the DOS structure, so that the radiating efficiency is greatly improved; simultaneously, the metal bumps for welding are directly manufactured on a radiating sink, so that the heat transfer distance is shortened; the thermochemical and mechanical planarization is utilized for carrying out surface modification and planarization on the surface of a diamond, so that the roughness of the surface is improved, and the valence bonds of the surface are activated, so that the adhesion among the diamond film and the metal bumps is improved, and the defects of generating air bubbles in the middle of a contact interface and the like are prevented; and due to the formed good contact interface, the heating resistance can be reduced and the radiating efficiency can be improved.

A probe card is provided. The probe card detaches or separates a probe assembly and a test signal generator which generates test signals from the tester and the printed circuit board, so as to form a probe system module. The probe system module is secured into a probe card module by one or more securing unit. The probe card module includes the printed circuit board. Control signals from the tester are wirelessly transmitted to the probe system module and drive the probe system module to generate the corresponding test signals. Therefore, the loss or distortion of the test signals due to having longer transmitting distances will be reduced and thus the test quality can be improved.

An urchin-like sodium-containing lithium-rich layered cathode material and a preparation method thereof belong to the field of a lithium ion battery electrode material and a preparation technology. The chemical composition of the material is Li1.2-zNazMn0.54Co0.13Ni0.13O2 (z is greater than or equal to 0.03 and less than or equal to 0.1), and the urchin-like structure is formed by hexagonal-prism-shaped primary particles. The method is prepared by the following steps: a transition metal composite carbonate (MCO3, M=Mn, Co, Ni) precursor is prepared by a coprecipitation method; through high-temperature roasting, transition metal composite oxide (MOx, M=Mn, Co, Ni) is obtained; and the transition metal composite oxide, a lithium source and a sodium source undergo ball-mill mixing, and finally high-temperature roasting is carried out so as to obtain the product. The invention has the following advantage: the material has good rate capability and cycling stability. During high-temperature roasting of the mixture of the transition metal composite oxide, the lithium source and the sodium source, by the influence of sodion on crystal growth orientation, the urchin-like sodium-containing lithium-rich layered material is obtained. In addition, the preparation process is simple.

An SOD system (100A) comprises a process block (8) for performing a prescribed processing so as to form an insulating film on a wafer W, a carrier block (7) for transferring the wafer W from the outside into the process block (8), a sub-transfer mechanism (12) for transferring the substrate W between the process block (8) and the carrier block (7), and a main transfer mechanism (15). A process tower (T1) prepared by stacking one upon the other a plurality of process units for performing a series of processing for forming an insulating film on the wafer W is arranged detachable from the process block (8).

The invention relates to frame type electromagnet automatic assembling equipment for a vending machine. The frame type electromagnet automatic assembling equipment comprises an operating table, a first rotating disc and a second rotating disc arrayed left and right are mounted at the upper part of the operating table, and a core shaft feeding device, a bottom shell feeding device, a riveting device and an overturning transfer device are arranged at the position, in the rotating direction of the first rotating disc, of the upper part of the operating table in sequence; and a sealing ring feeding device, a lubricating oil adding device, a bushing feeding device, a compaction fit device, a finished product discharging device and a product existence detecting device are arranged at the position, in the rotating direction of the second rotating disc, of the upper part of the operating table in sequence, and a control panel is arranged on the left side of the upper part of the operating table. According to the frame type electromagnet automatic assembling equipment, the control panel controls the cooperative operation of each device located around the two rotating discs through a PLC, the fact that the spare parts of a frame electromagnet are assembled into a frame electromagnet main body according to the set order is achieved, the manual feeding and discharging is achieved, a lot oftime and manpower cost are saved, the assembly quality and efficiency of the frame electromagnet are improved, and the high market application value is achieved.

The invention provides a preparation method of a 3D sea urchin spherical carbon-based nickel-cobalt bimetallic oxide composite material, comprising the following steps: 1) multi-wall carbon nanotubesand concentrated nitric acid are ultrasonically mixed evenly, processed by an oil bath, filtered, washed and dried to obtain acidified multi-wall carbon nanotubes; 2) prepare metal ion solution, adding acidify multi-wall carbon nanotubes, uniformly stirring, dropping acid-base regulator to adjust pH to obtain mixed solution; 3) transfer that mixed solution into a hydrothermal kettle, heat preservation to complete the reaction, cooling, filtering, washing, dry and grinding to obtain a composite material precursor; 4) that composite precursor is place in an air atmosphere and subjected to low-temperature pyrolysis treatment to obtain a 3D sea urchin spherical carbon-based nickel-cobalt bimetallic oxide composite material. The composite material prepared by the invention is applied in the zinc-air battery and exhibits excellent catalytic performance, so that the battery not only has high energy efficiency, but also has large power density, current density and specific capacity.

The invention discloses a resolution test device of an ultraviolet image intensifier. Two spherical reflectors and two plane reflectors are placed on a base in a straight line; and the two plane reflectors are respectively placed at focus points of the two spherical reflectors, so as to form a coaxial reflection type optical system. A resolution target is placed at the focus point of the coaxial reflection type optical system; a light source is placed in back of the resolution target; ground glass is located between the resolution target and an ultraviolet light source; an image intensifier is placed on a multi-dimensional adjusting table; and a microscope is mounted on the multi-dimensional adjusting table and can be used for observing a fluorescent screen image of the resolution target. According to the test demands, a user selects the resolution target and the image intensifier is shifted to a position of a focal plane of the optical system, so as to obtain the resolution of the ultraviolet image intensifier. The resolution test device disclosed by the invention has the advantages of small appearance size and volume, and convenience for resetting. Furthermore, the transmission distance of an ultraviolet target in atmosphere is reduced, the influence of the image difference is greatly reduced, and a clear image can be obtained under a condition of a short focus distance.

The invention provides a measurement and transmission apparatus for marine riser fatigue parameters and a calculation method of optimal repeater spacing. The apparatus comprises an underwater sound signal receiving device, a plurality of repeaters and a marine riser fatigue monitoring device. The marine riser fatigue monitoring device detects a fatigue signal and transmits the fatigue signal to the repeaters; and after multiple transmissions by the repeaters, the fatigue signal is transmitted to the underwater sound signal receiving device. According to calculation of energy consumption of different repeater spacing single hop links, total transmission energy consumption of employing different repeater spacings is figured out, thereby figuring out the optimal repeater spacing corresponding to a lowest total transmission energy consumption by comparison. The invention employs repeaters to shorten a signal transmission distance, reduce transmission power consumption of a single hop distance; besides, an optimal distance scope exists, so as to realize a lowest total transmission energy consumption.

The invention discloses a nanometer lithium zirconate modified lithium iron phosphate composite material and a preparation method thereof. The structural formula of the composite material is LixFeyPO4.zLi2ZrO3 / C, and the composite material comprises lithium iron phosphate, nanometer lithium zirconate and organic matter pyrolysis carbon. The composite material is characterized by being prepared by virtue of any one of the following methods: (1) preparing a precursor mixed liquor containing nanometer lithium zirconate through a hydrothermal reaction, drying, adding an organic carbon source, mixing, and calcining at a high temperature in an inert atmosphere; (2) preparing the precursor mixed liquor through the hydrothermal reaction, drying, calcining at a low temperature in the inert atmosphere, then adding the organic carbon source and nanometer lithium zirconate, mixing, and calcining at a high temperature in the inert atmosphere. The preparation method is simple; the prepared lithium iron phosphate composite material has the advantages of high conductivity, excellent multiplying power and low temperature performance, good cycle performance and the like, and can be widely applied to field of power batteries.