213 results about "Free expansion" patented technology

A cooling plate assembly for transferring heat from electronic components mounted on a circuit board includes both fixed and articulated interfaces. A fixed-gap coldplate is positioned over and in thermal contact with (e.g., through an elastomerically compressive pad thermal interface material) electronic components mounted on the circuit board's top surface. An articulated coldplate is positioned over and in thermal contact with at least one electronic component mounted on the circuit board's top surface. In the preferred embodiments, the articulated coldplate is spring-loaded against one or more high power processor components having power dissipation greater than that of the electronic components under the fixed-gap cooling plate. Thermal dissipation channels in the coldplates are interconnected by flexible tubing, such as copper tubing with a free-expansion loop. In the preferred embodiments, the coldplates and the flexible tubing are connected to define a portion of a single flow loop used to circulate cooling fluid through the coldplates.

The invention discloses a negative electrode material of a Li-ion battery and a preparation method thereof. The negative electrode material is a load-type negative electrode material, i.e. tin dioxide loaded with grapheme nanometer sheet. The negative electrode material has the advantages of higher electron and ion conductivity, large reaction area, large free expansion space, adaptability to various environments with large charge/discharge rate, and can endow the battery with high cycle performance, high specific capacity and quick charge/discharge capability; and the reversible specific capacity of the battery can be kept at a value larger than 600 mAh.g during charge/discharge with a current of 300 mAh.g. The preparation method of the negative electrode material is simple and feasible and suits industrial production.

The invention discloses a shale gas reservoir gas diffusion coefficient experiment test method. According to a method, a one-dimensional diffusion mathematic model is built by monitoring pressure attenuation data in a shale plunger rock sample under effective stress conditions of methane gas with a certain initial pressure in a constant-temperature closed system with the micro-pore structure and the gas existence state of a shale reservoir as bases, the diffusion coefficient of the gas (methane) in shale is calculated, and the diffusion mass-transfer capacity of the gas (methane) in the shale is quantitatively assessed. In the experiment testing process, the diffusion process of gas in the shale gas reservoir can be effectively simulated, and influences of effective stress, gas adsorption/desorption and other factors on the diffusion coefficient are reflected. Besides, the method can overcome influences of gas free expansion stage data in a traditional adsorption/desorption method on the diffusion coefficient. The method can assess the diffusion mass-transfer capacity of the gas in the shale and provide experiment support for researches in the aspects of shale gas reservoir productivity models, productivity prediction and the like.

The invention discloses a ceiling fan with automatic cleaning function. The ceiling fan comprises a rotating shaft, fan blades, a spring and a cleaning device; one end of the spring is connected with the rotating shaft; the other end of the spring is connected with the cleaning device which is inserted into the fan blades; the cleaning device comprises an upper splint and a lower splint which are connected; a gap is formed between the upper splint and the lower splint; the fan blades run through the gap; and the lower part of the upper splint and the upper part of the lower splint are provided with sponge or bristle. When the ceiling fan is used, a cleaning gear is arranged on a speed governor; when the speed governor is regulated to a normal wind speed gear, an electromagnet operates and has magnetism to restrict the spring in order that the cleaning device can not freely move under the action of centrifugal force; when the speed governor is regulated to the cleaning gear, the electromagnet has no magnetism and does not restrict the free expansion of the spring, and under the action of the centrifugal force and elastic force of the spring, the cleaning device reciprocates along the fan blades, thereby cleaning dust on the fan blades by the sponge or the bristle on the cleaning device.

The invention provides a hybrid derivative-free expansion Kalman filter-based USBL/SINS tight combined navigation positioning method particularly applicable to positioning of underwater equipment. Thehybrid derivative-free expansion Kalman filter-based USBL/SINS tight combined navigation positioning method involves a USBL acoustic positioning system and an SINS, and combined navigation is performed by a hybrid derivative-free expansion Kalman filter (HDEKF). The method comprises the steps of firstly, obtaining a slope distance measurement value between a transponder and a hydrophone by the USBL system through calculating one-way propagation time of an ultrasonic wave signal between the transponder and the hydrophone, and obtaining an observation equation by a coordinate conversion formula; secondly, building an error state equation according to an error transfer formula of the SINS; and finally, performing hybrid derivative-free expansion Kalman filtering, performing time updating bya standard linear Kalman filter, and performing measurement updating by a derivative-free expansion filter. By the method, the navigation accuracy and the stability of the USBL/INS combined navigationsystem can be effectively improved, and the real-time calculation quantity is reduced.

The invention discloses a distributed task scheduling operation and maintenance monitoring system and method, and relates to the technical field of information monitoring. The system comprises a management service system, a central control cluster, a balanced scheduling server and a task service cluster, wherein the management service system is used for performing task configuration and notifying task configuration information to the central control cluster through a message queue; the central control cluster is used for allocating task marks to selected task service nodes on the balanced scheduling server according to a preset task balancing policy and forming mark events; the balanced scheduling server is used for providing the task balancing policy; and the task service cluster is used for monitoring the mark events and loading and running tasks on the task service nodes. According to the system and the method, through the balanced scheduling server and the message queue, cluster free expansion and high disaster recovery of a system are realized, and intelligent scheduling of the tasks and load balance of the task service nodes are monitored.

The invention relates to a testing apparatus used for measuring the repeated expansion and shrinkage of a soil sample and a use method thereof. The device comprises a heating water tank 1, a loading frame 8, an evaporator 14, a freeze and thaw collapse chamber 17, a sample box 19, a weight 24, a pressurization lever 28 and the like. The testing apparatus has simple manufacture, high measurement precision and accurate temperature control, satisfies the requirements of freeze and thaw collapse of the soil sample and can be used for measuring the expansion and shrinkage amount and the volume change of various frozen and thaw collapsed soil textures in civil engineering. The testing apparatus is not only suitable for measuring under a pressure free expansion and shrinkage environment without load but also is suitable for measuring under a confining pressure environment with vertical load.

The invention discloses a preparation method of negative electrode material of lithium ion battery; oxidation, ultrasonic dispersion, vacuum filtration, natural air drying are carried out on the crystalline flake graphite using sodium nitrate, potassium permanganate and concentrated sulfuric acid to obtain the lithium ion battery negative electrode material, namely, graphene film with an area of 0.1-100 cm and a thickness of 0.1-100 microns. The negative electrode material in the invention has the advantages of high conductivity, large reaction area, large free expansion space in charge and discharge and adaption to different environments with high charge and discharge rates and the like, thus realizing high cycling battery performance, high battery specific capacity and swift charge and discharge capabilities of batteries; the reversible specific capacity can maintain above 300mAh-g when charging and discharging with current of 100mAh-g.The preparation process of the negative electrode material of lithium ion battery is free of agglomerant, conductive agent and metal current collectors, thus simplifying production process greatly, reducing cost and being applicable to industrialized production.

The invention discloses a fixed bed Fischer-Tropsch synthesis reactor, which mainly comprises a reactor shell, a heat exchange element, a catalyst bed layer, a gas inlet guide pipe and a gas outlet guide pipe, wherein the bottom of the catalyst bed layer is provided with a lower plate, and an upper plate is arranged above the catalyst bed layer. The reactor is characterized in that: a free expansion space is reserved between the initially filled catalyst bed layer and the upper plate; and the reactor is provided with a hot oil circulating system, a light oil quenching system and a quenching gas quenching system which are used for adjusting and controlling the temperature of a reaction bed layer. The invention also discloses a Fischer-Tropsch synthesis method, which is carried out in the fixed bed reactor. By the equipment and the method, a reaction environment of enhancing heat transfer and mass transfer is formed in direct and indirect heat transfer modes, the problem of recycling reaction heat in the Fischer-Tropsch synthesis reaction is effectively solved, and the aim of improving fixed bed Fischer-Tropsch synthesis production capacity is fulfilled.

A vacuum pressure swing absorption (VPSA) system and a four-cycle method are provided for separating and concentrating one portion of a gas mixture. A reciprocating piston (6) and associated valves and conduits can be combined with a bed of selective porous absorbent material (2) to produce concentrated oxygen from ambient air. The piston and valves are arranged to induct a feed gas mixture, produce product gas at a specified output pressure, regenerate the porous absorbent material, and expel depleted gas. Such an arrangement can result in higher energy efficiency as compared to conventional processes since free expansion losses are substantially avoided. The product gas flow can be adjusted to meet demand while maintaining high energy efficiency.

The invention discloses a device for measuring the free swelling rate and the water content of a rock and a using method thereof. By adoption of the Archimedes principle as a reference, the device utilizes a basic principle that the volume of displaced water of the rock changes with the volume change of the rock in water after the rock swells by water absorption. The structure of the device for measuring the free swelling rate and the water content of the rock is largely simplified by adoption of technical means such as sealing and packaging of a rock sample to be measured with rubber film. The device has characteristics of simple structure, convenient raw material selection, low manufacturing cost, convenient operation, and the like. The whole experiment device is small in systemic error. Experiment results are true, reliable and accurate. The device is suitable for laboratory use, and particularly can be used for simultaneously perform measurement of the free swelling rate and the water content of soft rocks.

The invention is suitable for the field of a data structure, and provides a method and a device for ordering tree structure nodes, and an enquiry system. The method comprises the following steps of: obtaining node data of all nodes of forming a tree, wherein the node data comprise layers of tree structures on which the nodes are, a father node of the nodes, and quantity of sub-nodes of the nodes; carrying out unique identification on all nodes of forming the tree, wherein the identification is used for unique identification of all the nodes of forming the tree; ordering all the nodes of the tree according to the node data and unique identification of the nodes, and storing the node data and the identification of the nodes. According to the embodiment of the invention, all the nodes can be ordered at correct positions by a traversal operation of table data, therefore, stability of a performance of a database is ensured; free expansion of a multi-level tree structure can be supported under the situation of not increasing expenses, and practicability is enhanced.

A micro-magnetic switch includes a permanent magnet and a supporting device having contacts coupled thereto and an embedded coil. The supporting device can be positioned proximate to the magnet. The switch also includes a cantilever coupled at a central point to the supporting device. The cantilever has a conducting material coupled proximate an end and on a side of the cantilever facing the supporting device and having a soft magnetic material coupled thereto. During thermal cycling the cantilever can freely expand based on being coupled at a central point to the supporting device, which substantially reduces coefficient of thermal expansion differences between the cantilever and the supporting device.

Belonging to the field of coalbed methane exploitation, the invention discloses a measurement device and method for free expansion volume of coal rock adsorption. The device includes a sample chamber (1), a heating and thermal insulation device (2), a confining pressure tracking pump (3), a back pressure buffer container (4), a liquid holding container (5), a balance (6) and a back pressure valve (7). The sample chamber (1) is fixed in the heating and thermal insulation device (2), the confining pressure tracking pump (3) is connected to an annular space (1-3), the back pressure buffer container (4) is respectively connected to the confining pressure tracking pump (3) and the back pressure valve (7), the other end of the back pressure valve (7) is connected to the annular space (1-3), and the liquid holding container (5) and the balance (6) are placed at another branch outlet. The method measures the mass of liquid discharged by coal sample expansion deformation and then performs conversion to obtain the expansion quantity and expansion coefficient of coal rock. With the device and the method provided by the invention, the free expansion volume and expansion coefficient of the coal rock sample can be obtained, the measurement accuracy is high, and no complicated conversion is needed.

The invention discloses surface layer mortar, grindstone, a board and a preparation method of the grindstone and the board, and relates to the technical field of stone materials. The surface layer mortar is prepared from the following components in percent by mass: 20-45% of cement, 55-67% of aggregate, 0-5.4% of nanometer silica fume, 0-6.5% of mineral powder, 2-3% of dispersible rubber powder, 0-0.2% of a retarder, 0.1-0.3% of a coagulant, 0.1-0.3% of a water reducing agent, 0.05-0.3% of a defoaming agent, 0.01-0.02% of a thickening agent and 2-3% of pigment; the cement comprises high belitesulfoaluminate cement and optional ordinary cement, wherein the mass of the high belite sulfoaluminate cement accounts for 20-100% of the mass of the cement; and the water-material ratio of the surface layer mortar is 0.08-0.1. The fluidity, breaking and compressive strength and free expansion rate of the surface layer mortar meet related index requirements; and the grindstone or board prepared by adopting the surface layer mortar is small in size shrinkage, does not deform, does not crack, and has no alkali efflorescence.

The invention belongs to the technical field of green ultrahigh-performance building materials, and relates to low-shrinkage corrosion-resistant ultrahigh-performance concrete, and a preparation method, construction method and application thereof. The concrete comprises the following components in percentage by weight: 49.1-62.9% of high-bending-resistance super-sulfate cement, 20-39.95% of fine aggregates, 0.15-0.5% of a water reducer, 0.04-0.3% of a defoaming agent, 0-0.3% of a coagulant, 1.5-25% of fibers and 0-0.4% of a retarder. According to the low-shrinkage corrosion-resistant ultrahigh-performance concrete provided by the invention, the bending strength after 28 days reaches 32.8 MPa, the compressive strength reaches 165.1 MPa, the free expansion rate in water after 28 days is 0.12%, and the dry shrinkage value after 28 days is 0.035%. Concrete with different flowing properties is prepared to meet application requirements of ultra-high-performance concrete products such as curtain walls, decoration concrete and the like and application requirements of different construction technologies.

The invention relates to an intracranial aneurysm virtual intervention stent implantation method and device, a computer device and a storage medium. The intracranial aneurysm virtual interventional stent implantation method comprises: acquiring data, wherein image data are acquired; And processing the data: segmenting the acquired image data and establishing the shape of the blood vessel to be evaluated; and obtaining a target blood vessel: obtaining a starting point and a terminal point in the blood vessel to be evaluated to obtain a target blood vessel; acquiring stent parameters: acquiringspecific parameter information of the virtual interventional stent; and processing the stent data: generating a three-dimensional point-line model of the stent in a free expansion state according to the acquired specific parameter information of the virtual interventional stent; and support bending deformation processing: carrying out bending deformation processing on the three-dimensional point-line model of the support in a free expansion state to obtain an expansion support image; and compression bracket processing: carrying out compression processing on the expansion bracket image to obtain a compression bracket image; and stent simulated release: placing the compressed stent image into a target blood vessel in a simulated manner.

The invention relates to a 12 core fusing and assembling integrated tray which structurally comprises a terminal tray, a butt fusion tray, a cover plate, a dropleaf and a movable butt fusion chip. The butt fusion tray is connected with the terminal tray through a revolving shaft at the rear end of the butt fusion tray. The movable butt fusion chip is arranged at the upper end of the butt fusion tray in a buckling mode so as to achieve flexible exchange. The dropleaf is hinged with the cover plate and covers the terminal tray and the butt fusion tray as a whole. The 12 core fusing and assembling integrated tray has the advantages that adapters of different specifications can be flexibly arranged in a left direction or a right direction. Functions of accessing, fixing and hot fusing a fiber to the home (FTH) flex cable are achieved. The adapters of different specifications can be exchanged online at a construction spot and switching between the left direction and the right direction can be achieved. A next generation intelligent optical distribution network (ODN) data line can be conveniently accessed. Accessing the cable and fiber dispatching at an end face can be performed at the same side of the tray. An adjustable track can be conveniently installed and barrier free expansion between a line pair optical distribution frame (ODF) and an output circuit check (OCC) rack can be achieved. A user can conveniently refit and expand equipment at a construction spot.

The invention relates to a process for manufacturing a container (14) from a thermoplastic preform (2) carrying a body (4) that extends along a main axis (A), which process comprises: - a selective heating step in which the body (4) of the preform (2) is exposed to monochromatic or pseudomonochromatic infrared radiation, the power of which is modulated along the main axis (A) of the body (4) so that the latter has an alternation of hot annular regions (4A, 4C, 4E, 4G, 4I), the temperature of which is very much greater than the glass transition temperature (Tg) of the thermoplastic, and comparatively cooler annular regions (4B, 4D, 4F, 4H), the temperature of which is close to the glass transition temperature (Tg); and - a forming step in which a pressurized fluid is injected into the preform (2) thus heated, this step resulting in free expansion.

The invention discloses a gear synchronous displacement modular expansion joint which comprises bridge main bodies arranged at intervals, a displacement box fixedly arranged at the lower part of the two bridge main bodies, a horizontal cross beam which extends across the gap between the main bodies of the bridge along the length direction of the bridge main body arranged between the two relative displacement boxes; the cross beam is provided with a middle beam which is perpendicular to the cross beam and extends along the width direction of the bridge main body; the lower surface of the middlebeam is fixedly provided with a gear protection box, an expansion joint sliding connection device is arranged in the gear protection box, and two ends of the expansion joint sliding connection deviceare respectively fixedly connected with a rack fixing part embedded in the bridge main body. The device has the advantages of simple structure, convenient maintenance and disassembly, and the expansion joint sliding connection device can realize the free expansion and contraction movement of the expansion joint when the stress of the two ends of the bridge main body is not uniform, and the problem of easy damage due to uneven stress is overcome. The gear synchronous displacement modular expansion joint is suitable for use as a connecting device in a bridge expansion joint.

The invention relates to a similar material for simulating expansive soil tunnel surrounding rock in a model test and a preparation method thereof. According to the similar material, clay and bentonite, which pass through a 4.75mm sieve, serve as main raw materials, the materials are proportioned by a weight part ratio according to different expansion levels, weak expansive soil is prepared from 100 parts of clay and not less than 2 and less than 10 parts of bentonite, medium expansive soil is prepared from 100 parts of clay and not less than 10 and less than 22 parts of bentonite, strong expansive soil is prepared from 100 parts of clay and not less than 22 and less than 30 parts of bentonite, water is added to the mixed materials, and compaction molding is carried out so as to prepare the similar material. According to the similar material and the preparation method, expansive soil with different free expansion ratios can be prepared so as to carry out the model test, so that the mechanical and deformation characteristics of the expansive soil surrounding rock can be met, the raw materials can be obtained locally, the operation is simple and convenient, and the resource utilization ratio is increased.

The invention discloses a bamboo joint type high-precision determination device for a free expansion ratio of rock. The determination device comprises six parts: an upper cross beam, a bamboo joint type bracket, coin-shaped strong magnets, a longitudinal displacement extensometer, a horizontal displacement extensometer and an irony chassis, wherein the upper cross beam is a common steel plate strip; the length of the upper cross beam is determined by the size of a tested sample; each bamboo joint type steel column has a 70mm height, 26mm outer diameter and 13.5mm inner diameter; and the coin-shaped strong magnets embedded in the bamboo joint have 2mm thicknesses and 19mm diameters. For the tested pieces different in size, users can easily adjust the height of vertical columns by increasing or reducing the quantity of the bamboo joint type steel columns and magnets; the two vertical columns are formed by sucking and sticking a plurality of bamboo joint type steel columns in same size to the magnets; the two vertical columns are firmly adsorbed on upper and lower metal plates; and the free expansion ratio of rock is tested through displacement convergence meters of the longitudinal displacement extensometer and the horizontal displacement extensometer. The determination device has the advantages of simple structure, freedom, flexibility, high precision and reliable performance.

The invention relates to an application method of dynamic service creation in service system application software. The application method comprises two steps: creating a dynamic service model and creating the service; the step of creating the dynamic service model comprises the following steps: creating a dynamic service group; creating an entity service model node for the dynamic service group; creating a service entity object for the service model; creating object properties for the service object; and the step of creating the service comprises the following steps: creating a service flow template; selecting the dynamic service group for the service flow template and leading the service model in; defining a service flow and defining operation steps for the service; binding the entity object of the service model for flow steps; storing a flow configuration, and activating the service. Compared with the prior art, the invention has the advantages that the reusability is high, all prior components of a system can be reused by a dynamic service creation method, and the coding-free expansion of the system can be achieved.