456results about How to "Stable and stable" patented technology

The invention provides a cement-based composite material used for a 3D printing technology as well as a preparation method and application thereof. The cement-based composite material is prepared from the following raw materials based on the total weight of the composite material: 33%-40% of cement, 0%-8% of inorganic powder, 32%-38% of tailing machine-made sand, 2.5%-3% of a high-molecular polymer, 0.1%-0.5% of a water reducing agent and 16.7%-20% of mixing water; a composite thickening time control agent, a thixotropic agent, a volume stabilizer and the like are added into a mixture to prepare an inorganic composite material; and then the inorganic composite material can be directly pumped into a 3D printer for building to be applied to construction. The cement-based composite material is an inorganic material and the materials are easily available; a lot of industrial waste materials can be used; therefore, the cement-based composite material is low in cost, energy-saving and environment-friendly; the condensation time can be flexibly controlled, and the material has super early strength, good caking property and strong stability; the requirements of 3D printing construction continuity of the building and the building strength are met so that the house building has good global stability and use safety; and the application and popularization of 3D printing technology can be greatly promoted.

This invention relates to a method for testing directions of coherent signal sources under non-stable noise background including: collecting data received by channels and storing them in an EMS memory of the system, making adaptive uniform process to data received by the channels to form an array covariance matrix, utilizing a forward space smooth technology to preprocess it smoothly to constitute a forward space smooth covariance matrix and utilizing a forward and backward space smooth technology to smoothly pre-process the matrix to constitute a generalized covariance matrix based on the covariance matrix and a conjugated matrix and carrying out spectrum estimation to the generalized matrix with a sub-space class algorithm to identify a real incident direction of image false peak and signal source and output the real direction of the estimated signal source.

The invention discloses an epoxy matrix resin, a prepreg, a preparation method of the prepreg and a device for preparation of the prepreg, in order to solve the problem of poor performance of an epoxy matrix resin curing substance caused by uneven toughening phase state even no phase separation in the traditional epoxy matrix resin curing product, the problem of complex technique of the traditional preparation method of the prepreg and relatively imprecise control on the resin content in the prepreg, and the problem of high manufacturing cost of the traditional device for preparing the prepreg. The epoxy matrix resin is prepared from a phenolic epoxy resin, a bisphenol A epoxy resin, a core shell polymer, a curing agent and a curing accelerator; the prepreg is prepared from the epoxy matrix resin and fiber woven cloth; and the prepreg is prepared through the device for producing the prepreg by a heat fusion method. After and before the resin is cured, the toughening phase state is not changed and is uniformly dispersed; and the toughening phase state effect is good and stable. The mechanical property of the composite material obtained by curing with the prepreg is high.

The invention relates to a quality of service (QoS)-based audio and video quality of experience evaluation platform and a QoS-based audio and video quality of experience evaluation method. The method comprises that: an audio and video coding module codes a multimedia file into an audio and video source file in a given format; an audio and video transmission module encapsulates the audio and videosource file into a data packet, and transmits the data packet to a network; a network simulation module simulates the non-destruction or destruction of an actual network environment by the setting ofnetwork parameters to obtain a non-destructive or destructive network environment; an audio and video receiving module decapsulates the data packet on the network and dumps decapsulated data into a reference audio and video file in the non-destructive network environment, and receives the destructive data packet on the network, decapsulates the received data packet and dumps the decapsulated datainto a test audio and video file in the destructive network environment; an audio and video decoding module separates video tracks and audio tracks in the reference audio and video file and the test audio and video file, and decodes the video tracks and the audio tracks into a video format and an audio format required by evaluation respectively; and finally an audio and video quality evaluation module evaluates video files and audio files respectively.

The invention relates to a real-time space target feature point tracking method suitable for a space tethered robot. The method is mainly formed by a feature point extraction algorithm, a feature point matching algorithm, discrete point elimination, accurate positioning and a self-adaptive strategy. Feature points extracted through an improved SURF algorithm are strong in robustness and stability. The method enables the feature point matching accuracy and target positioning accuracy to be high, and is suitable for stable tracking of targets which have rapid changes in positions and gestures and are simple in structure in a multi-scale image sequence. The method has robustness in various types challenging situations, and the tracking process has short-term anti-occlusion capacity. The method can be used for achieving the real-time detection and tracking of a plurality of types of targets, is suitable for real-time robustness tracking for the space targets which have rapid changes in positions and gestures and are simple in structure in the multi-scale image sequence.

The invention discloses an auxiliary rehabilitation exercise device for realizing finger rehabilitation exercise. The device comprises a bracket and a finger support arranged on the bracket. One end of the bracket is provided with a first shaft, and one end of the first shaft is connected with a motor; the other end of the bracket is provided with a second shaft, one end of the second shaft is connected with a magnetorheological fluid damper, and the other end of the second shaft is connected with the other end of the first shaft by a spring; the finger support is fixed on the second shaft, the second shaft is also provided with an angular transducer for measuring angular displacement of the second shaft and a force transducer for measuring torque of the second shaft. Compared with the prior art, the device combines active and passive finger rehabilitation exercises, is especially suitable for the rehabilitation exercise of single wounded finger. Meanwhile, the device has simple and compact structure and low machining precision requirement.

An object of the present invention is to provide an apparatus for producing stable plasma. Another object of the present invention is to provide an apparatus having a long-lasting cathode electrode which is superior in field emission characteristic since the plasma density has to be raised in order to increase the throughput. The structure of the plasma producing apparatus of the present invention relates to a plasma producing apparatus with a plasma chamber surrounded by walls to make material gas into plasma, characterized in the plasma chamber has a cathode electrode, an anode electrode, means for introducing the material gas, and exhaust means, and that a carbon nano tube is formed on a surface of the cathode electrode and the anode electrode is formed on the surface of the cathode electrode.

The invention relates to a method for preventing silt by injection and diversion, including laying injection pipe network underwater which communicates with water supply facilities. The injection pipe network comprises at least one main pipe which is provided with injection holes with an interval, and water column having certain pressure can be ejaculated through the injection holes. The injection pipe network also comprises a total pipe and a discharge pipe arranged parallel with the total pipe, the total pipe communicates with water supply facilities, and the total pipe is communicated with the parallel discharge pipe through a plurality of branch pipes; the total pipe and the branch pipes are all provided with injection holes, and water column having certain pressure can be ejaculated through the injection holes. The method of the invention is applied to the water areas where water can flow naturally such as rivers and estuary, and can prevent the main water channel from being silted by silt and keep the direction of the main water channel not changing; can be applied to deep water regions excavated by manpower to prevent silt from depositing in the region, can move the silt from the pipe network under the function of water flow to achieve the effect of silt prevention; and is suitable for the harbor basin of harbor.

The invention discloses a small brick clamp trolley and a brick stacker crane with the small brick clamp trolley. The clamp trolley comprises an inner frame, a front brick clamping arm, a rear brick clamping arm, a push-pull oil cylinder mechanism driving the front brick clamping arm and the rear brick clamping arm to move front and back, a left brick clamping arm, a right brick clamping arm, a telescopic oil cylinder mechanism driving the left brick clamping arm and the right brick clamping arm to move left and right, a lifting electric push-pull rod and a lifting guide wheel set. The front brick clamping arm, the rear brick clamping arm, the left brick clamping arm and the right brick clamping arm are correspondingly arranged on the front side, the rear side, the left side and the right side of the inner frame. The lifting electric push-pull rod is connected with the inner frame through the lifting guide wheel set so as to drive the inner frame to ascend and descend. According to the small brick clamp trolley, the movement of the front brick clamping arm, the rear brick clamping arm, the left brick clamping arm and the right brick clamping arm is controlled through the push-pull oil cylinder and the telescopic oil cylinder, clamping of a single layer of bricks is achieved, the strength of the small brick clamp trolley is uniform and controllable, and stable transferring of the single layer of bricks is achieved. In addition, the small brick clamp trolley can walk, and therefore the single layer of bricks can be clamped at the optimal angle.

The invention provides a system and a method for testing the performance of a copper core low-voltage cable after manufacturing and processing, and the system comprises a double-item detection mechanism, a single-item detection mechanism and a joint control mechanism. Since an existing cable mechanical performance testing device can only test the cable of one model and size, when mechanical performance testing is carried out on cables of different models and sizes, testing can be carried out only by replacing devices of corresponding models, and mechanical performance testing of the cables has limitation and is high in testing cost; and testing of the mechanical performance of the cables is divided into a plurality of specific small testing, and the existing testing device for the mechanical properties of the cable cannot meet the operation execution of various tests, is difficult to ensure the comprehensive detection of different mechanical properties of the cable, and cannot meet the strict test requirements of various properties of the cable after being manufactured and processed, and the like.

The invention provides a reinforcing member for a vehicle backdoor inner plate. The vehicle backdoor inner plate comprises a windshield installing hole formed in the upper portion of the vehicle backdoor inner plate and D-column areas located on the two sides of the windshield installing hole; the reinforcing member comprises a pair of reinforcing member bodies symmetrically arranged in the D-column areas, wherein each reinforcing member body is divided into a bent section and a vertical section from top to bottom, both the bent section and the vertical section are composed of first side walls, second side walls and first bottom plates, a honeycomb structure is arranged between the first side wall and the second side wall, and the reinforcing member is wholly formed by a composite material. The honeycomb-type composite-material reinforcing member is high in strength, light in weight, simple in forming technology and high in size accuracy and stability and is used for the vehicle backdoor inner plate.

Provided is a method for producing a high-concentration long-acting ozone nanobubble aqueous solution capable of maintaining ozone concentration for a long period of time at room temperature. A microbubble generator is adopted to produce ozone nanobubbles in an aqueous solution in which a bubble-retaining agent is dissolved, so that ozone nanobubbles having a particle size of less than 500 nm areproduced in excess of 129*108/100 mL, and the bubbles can stably remain in the aqueous solution for a long period of time. The ozone concentration of the ozone nano-bubble aqueous solution is 18.5-63mg/L; and the ozone concentration of the ozone nano-bubble aqueous solution can still be kept above 60% after the ozone nano-bubble aqueous solution is sealed, shaded and stored for three months at normal temperature. The ozone nano-bubble aqueous solution has higher sterilization capability than existing ozone water. The aqueous solution can be applied to the fields of medical treatment, sanitation, industry, food processing, agriculture, breeding industry, fresh keeping, disinfection, decontamination, deodorization, washing, family individuals, pets and the like.

The invention relates to the technical field of steel structures, in particular to an adjustable building stand column connecting mechanism and a using method. The adjustable building stand column connecting mechanism comprises a first column body and a second column body, and further comprises a controller, a first adjusting device, a second adjusting device and a top connecting device; and the first adjusting device is arranged at the bottom of the first column body and used for accurately adjusting the installation position of the first column body, the first adjusting device comprises a bottom shell, the second adjusting device comprises a top cover, a bottom cover, four flexible connecting assemblies and four rigid connecting assemblies, the top connecting device comprises a lining and a connecting assembly, the lining is arranged on the outer wall of the top of the second column body, the connecting assemblies are arranged on the top of the lining, and the rigid connecting assemblies are electrically connected with the controller. According to the adjustable building stand column connecting mechanism and the using method, the mounting position of stand columns can be accurately adjusted, and time and labor are relatively saved during adjustment; and meanwhile, according to the stress condition of the stand columns, an internal connecting mechanism can be automatically adjusted to prevent collapse.