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

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.

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.

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 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.

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.

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 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 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.