84results about How to "Open structure" patented technology

A bioprosthetic device is provided for soft tissue attachment, reinforcement, and or reconstruction. The device comprises a naturally occurring extracellular matrix portion and a three-dimensional synthetic portion. In illustrated embodiments, the naturally occurring extracellular matrix portion comprises layers of small intestine submucosa, and the three-dimensional synthetic portion comprises a foam or a three-dimensional mesh, textile, or felt.

A bioprosthetic device is provided for soft tissue attachment, reinforcement, and or reconstruction. The device comprises a naturally occurring extracellular matrix portion and a synthetic portion.

A low profile occlusion device for percutaneous or direct transcutaneous placement into a vein or other tubular vessel of the body. Two wires form one or more loops having a thin cover disposed between them. The loop forms a beveled angle within the blood vessel and the cover prevents blood flow through the vessel. An additional loop can be present to prevent device embolization or device migration. The occlusion device is delivered to a vein such as an incompetent perforator vein or other incompetent vein through a small flexible sheath. Ultrasound guidance is used to position the occlusion device which can be repositioned within the vessel if necessary.

An interactive electronic demonstration system comprises an operating terminal, a display terminal and an interaction controller; the operating terminal is used for storing and demonstrating displayed contents and performing demonstration operation; the display terminal is used for displaying the displayed contents of the operating terminal; the interaction controller is used for obtaining and transmitting the displayed contents and operating information of the operating terminal to the display terminal; the video input interface of the interaction controller is connected with the video output interface of the operating terminal through a wire or wirelessly, and the video output interface of the interaction controller is connected with the video input interfaces of the display terminal and the operating terminal through wires or wirelessly. The operating terminal can be a desktop computer, a laptop computer, a tablet personal computer or a mobile phone. The operating terminal can be connected into the system through the wire or wirelessly, various conventional intelligent terminals with the computer function can be adopted at the operating terminal, and a user can perform demonstration interaction operation in an entire area.

The invention discloses a control system of a numerical control system master station over an input/output (IO) terminal slave station. The control system comprises the numerical control system master station and the IO terminal slave station, wherein the numerical control system master station comprises a hardware platform and a soft body part positioned on the hardware platform; and the soft body part comprises a numerical control software module arranged on a Linux operating system and an EtherCAT communication protocol stack module connected with the numerical control software module. A control instruction is transmitted to the IO terminal slave station in a network transmission manner according to an EtherCAT bus communication protocol through output/input pins on a soft circuit driving layer module and input/output pins on IO terminals of the IO terminal slave station, and the input/output pins are in one-one mapping connection, so that the IO terminal slave station can be controlled. The control system is high in instantaneity, high in communication speed, relatively high in synchronism, open in software structure and relatively high in network communication capacity and data processing capacity.

The invention provides a preparing method of a carbon-loaded monoatomic metal nitrogen-containing compound oxygen reduction catalyst. The method comprises the steps of pre-oxidizing nitrogen-containing biomass at a first high temperature, after a pre-oxidized product is uniformly mixed with a transition metal source and a pore-forming agent, conducting first calcination at a second high temperature in an inert gas atmosphere, after a calcined product is subjected to acid pickling, washing and drying, conducting second calcination again at the second high temperature, and finally, obtaining thecarbon-loaded monoatomic metal nitrogen-containing compound oxygen reduction catalyst. The preparing method has the advantages of being low in raw material cost, simple in preparing technology and the like; the prepared catalyst has the advantages of being high in pH universality, atom utilization rate, catalytic performance and stability, excellent in methyl alcohol resistance and the like, is expected to replace expensive carbon-loaded platinum catalysts, and is about to have a wide application prospect in efficient and cheap large-scale commercialized fuel cells.

A radial shaft seal with a sealing element made of a non-woven fabric impregnated with an active material, particularly PTFE. The shaft seal is disposed between a stationary machine part and a rotating shaft. In the axial direction, the sealing element consists of at least one layer of non-woven fabric impregnated with a PTFE dispersion and laminated under pressure and heat.

The invention belongs to the field of an FACTS (Flexible Alternate Current Transmission System) of a power supply system, particularly relates to a control and protection system with independent control and protection functions, which is used for a series compensation device or a fault current limiter. The control and protection system comprises a protection part, a control part and an operation executing part and realizes relatively independent control function and protection function. A protection device and a measurement and control device have abundant external communication interfaces, and in consideration of the access of in-station electric quantity information, switching value information and the like at the external communication interfaces of the measurement and control device, the structure of the measurement and control device is more open and flexible. The control and protection system can be applied to fixed series compensation type, controllable series compensation type and series resonance type fault current limiters and other flexible alternate current power transmission devices.

A steel cord having a plurality of strands twisted together with a cord twist pitch. Each strand having a plurality of filaments twisted together with a strand twist pitch. The elongation at break of the steel cord is no less than 5%. The strand having a strand twist angle. The steel cord having a cord twist angle. When the sum of the strand twist angle and the cord twist angle is between 20 and 29 degree, the structural elongation of the steel cord is no less than 2.0%. When the sum of the strand twist angle and the cord twist angle is between 30 and 38 degree, the structural elongation of the steel cord is no less than 2.5%. When the sum of the strand twist angle and the cord twist angle is between 39 and 48 degree, the structural elongation of the steel cord is no less than 3.0%.

The invention discloses a catalyst for synthesizing tirbutyl citrate and a preparation method thereof. in the preparation of the catalyst, a strong acid mesoporous material prepared by a hydrothermal synthesis method is used as a carrier, and strong acid ionic liquid is bonded on the mesoporous material carrier by chemical bonds, wherein the bonding mode of the acid ionic liquid adopts surface modification, the mesoporous material is any one of mesoporous silicon, mesoporous zirconium and mesoporous titanium, and the acid ionic liquid is ionic liquid containing phosphate radicals or sulfate radicals. The preparation method comprises the following steps of: preparing the mesoporous material carrier by utilizing precursors of the zirconium, the titanium or the silicon with hexadecyl trimethyl ammonium bromide by a conventional hydrothermal method; then carrying out surface modification with the acid ionic liquid: sufficiently reacting the mesoporous material carrier with a silane coupling agent KH-550 and methylbenzene and then reacting with 1,3-propane sultone or 1,4-butane sultone; and finally, reacting with ionic liquid containing strong acid groups to obtain the mesoporous material. After the catalyst is used, the conversion rate of citric acid is 90-99 percent.

The embodiment of the invention provides a sending method of digital communication, comprising the following steps: a system sends configuration tables and dictionaries to nodes in the network; sending nodes send data packets to receiving nodes, wherein, the data packet at least comprises the fields of four parts including address, control, length and data; the configuration tables are used for analyzing the fields of the four parts. The embodiment of the invention also provides a receiving method of digital communication and digital communication equipment. By defining uniform data format, the technical scheme provided by the embodiment of the invention provides network architecture which can be suitable for realizing industrial network automation and has the characteristics of openness,interoperability, standard, real time and safety. Besides, the realization of protocols is simple and efficient.

A DNA molecular tile or a nucleic acid nano-structure thereof, and applications thereof. The DNA tile includes a small-ring single-chain DNA molecule and a linear single-chain DNA molecule, which arecombined, through the base pairing rule, into integrated, nucleic acid nano-array-constructing, stable, and individual-existing or individual-not-existing molecule element structures, wherein the small-ring single-chain DNA molecule serves as a support chain and the linear single-chain DNA molecule serves as an assistant chain. The molecule element structure at least includes one Holliday junction. The nucleic acid nano-structure at least includes one molecular tile, wherein every molecular tile is composed of at least two adjacent side-by-side anti-parallel double helix chain segments; the head and tail of each chain segment are passive terminals, or are respectively provided with a sticky terminal. The adjacent molecular tiles are paired complementarily according to geometrical shapes orthrough the sticky terminals or are connected through the Holliday junctions. The invention also provides applications of the DNA molecular tile or the nucleic acid nano-structure in the fields suchas biomedicines, mathematics, computer, chemistry and chemical engineering, physical electronics, nanotechnology, etc.

The invention relates to a wind-solar complementation new energy application experiment platform comprising a DC bus, a central controller, a solar power generation module, a wind power generation module, an energy storage module, a single-phase variable-frequency inversion module, a DC load module, a DC motor driving module, an LED lighting module and a three-phase grid-connected inversion module. The solar power generation module, the wind power generation module, the energy storage module, the single-phase variable-frequency inversion module, the DC load module, the DC motor driving module, the LED lighting module and the three-phase grid-connected inversion module are electrically connected with the DC bus respectively. The central controller communicates with the solar power generation module, the wind power generation module, the energy storage module, the single-phase variable-frequency inversion module, the DC load module, the DC motor driving module, the LED lighting module and the three-phase grid-connected inversion module through a wireless sensor network. A leading-edge, advanced, comprehensive and curricular and extracurricular integrated experiment and scientific research platform with sharing of undergraduates, postgraduates and doctors is constructed.

The invention discloses an unmanned remote control transfer cart and aims to provide a transfer cart which is convenient to operate, high in transfer efficiency, small in turn radius, low in requirement on space and flexible in movement, can perform in-place transverse, longitudinal, slant movement and rotation around any rotating shaft, is flexile in regulation and adaptable to complex road conditions, and has obvious advantages under the conditions of high product weight, large product size and small spatial environment. The unmanned remote control transfer cart comprises a carriage with travelling wheels. The front and rear side ends of the carriage are provided with self-adaptive suspension gears (5) connected with a spindle-type universal wheel (8) through wheel brackets (6); through a universal wheel rotating shaft (24) in the center of the spindle-type universal wheel (8), the spindle-type universal wheel (8) is coaxially connected with a reducer (31) with a servo motor (32) and arranged in fork ear connecting holes in the wheel brackets (6); and a control system connected with a servo motor driver instructs the direction of advancing motion.

The invention discloses a universal full-automatic box covering mechanism in order to overcome the defects that during packaging and covering of boxes, the work efficiency is low, labor intensity is high, the covering positions are prone to being inaccurate, and a special box covering machine is complex in structure, high in equipment investment, inconvenient to maintain and poor in universality. The universal full-automatic box covering mechanism comprises a box conveying line, a box cover conveying line, a box cover buffering platform, a transverse linear module, vertical linear modules, a push piston cylinder and pre-tightening piston cylinders, wherein a plurality of shifting rods are arranged on the box cover conveying line; telescopic rods of the two pre-tightening piston cylinders are both connected with connecting plates; the inner sides of the two connecting plates are connected with movable plates in a lifting mode; the inner sides of the movable plates are connected with pre-tightening rods, and the rear ends of the pre-tightening rods are of an L-shaped structure; a telescopic rod of the push piston cylinder is connected with a push plate; the two ends of the transverse linear module are connected with the two vertical linear modules in a lifting mode, and the transverse linear module is connected with a moving plate in a sliding mode; the moving plate is connected with a sucker, and the connecting position of the sucker on the moving plate is adjustable.

The invention discloses a small flow control valve which can be used in rigorous conditions. The small flow control valve comprises five parts, namely a hydraulic mechanism, a reset device, a valve connecting device, a valve body and an actuator. The hydraulic mechanism is composed of a whole rack, an active piston, a slave piston and an actuator connecting device. The valve body adopts a conventional high-pressure valve structure provided with an adjusting type valve rod, and a valve element adopts a long conical valve needle and a valve seat. The actuator adopts a general piston type actuator with a long stroke. According to the flow valve, stable control over micro-flow can be realized through extremely tiny opening change, and precise control over the micro-flow under a high pressure difference is achieved. Meanwhile, the control valve further has the characteristics of open structure, flexible configuration, convenient conversion and convenient maintenance and adjustment.

The invention discloses a metal cord thread. The metal cord thread is made of a plurality of strands twisted according to the twisting length of the cord thread, each strand is composed of a plurality of metal wires according to the twisting length of the strands, elongation at break of the metal cord thread is not smaller than 5%, the strands have a strand twisting angle and the metal cord thread has a cord thread twisting angle. The sum of the strand twisting angle and the cord thread twisting angle ranges from 20 degrees to 29 degrees, the structural elongation of the metal cord thread is not smaller than 2.0%; when the sum of the strand twisting angle and the metal cord thread twisting angle ranges from 30 degrees to 38 degrees, the structural elongation of the metal cord thread is not smaller than 2.5%; when the sum of the strand twisting angle and the metal cord thread twisting angle ranges from 39 degrees to 48 degrees, the structural elongation of the metal cord thread is not smaller than 3.0%. Preferably, the structural elongation of the metal cord thread is not larger than 4.0%. The metal cord thread has the advantages of high elongation at break, high structural elongation and high rubber permeability. The invention further relates to a rubber tire comprising the metal cord thread.

The invention discloses a capacitive coupling device and a filter. The device at least comprises a first dielectric resonator and a second dielectric resonator, a negative coupling hole is formed between the first dielectric resonator and the second dielectric resonator; the negative coupling hole comprises a longitudinal blind hole and a transverse blind groove, the longitudinal blind hole is located in the surface of a body at the connection position of the first dielectric resonator and the second dielectric resonator and is perpendicular to the surface of the body, and the transverse blindgroove is located in the body at the connection position of the first dielectric resonator and the second dielectric resonator. According to the capacitive coupling device, the longitudinal blind hole and the transverse blind groove are formed between the two dielectric resonators to form the negative coupling hole, the negative coupling between the two dielectric resonators is achieved, and thestructure is simple; the structure is used in the filter, because the area formed by two holes is larger, a transmission zero point can be formed at the low end of the passband of the filter, the rectangular coefficient of the filter is increased, the performance of the filter is improved, and the size of the filter is reduced.

The invention discloses a method for preparing a titanium dioxide nanoflower electrode. The method comprises the steps of firstly, preparing a layer of titanium dioxide nanotube array film on the surface of a titanium substrate through a constant-voltage anodic oxidation method; then immersing the film into a phosphoric acid aqueous solution; and carrying out hydrothermal treatment at a temperature lower than 90 DEG C to obtain the titanium dioxide nanoflower electrode. A prepared titanium dioxide nanoflower is about 10-20 nm in average thickness, and is composed of petals with the heights ofabout 440-980 nm and the widths of about 280-800 nm; the use of non-environment-friendly reagents such as heavy metal ions, tetrabutyl titanate, organic solvents and the like is avoided in the preparation process; and compared with an existing preparation method, the method is more efficient, low in cost and high in safety and controllability.