Abstract: The invention outlines a method for producing large-sized square tubes from composite materials, incorporating a finishing process. This method addresses the need for high-quality square tube products made from composite materials, which must meet stringent requirements for lightweight design, high mechanical strength, and pressure resistance both internally and externally. The process consists of the following steps: step 1: prepare necessary equipment and materials; step 2: wind the inner layers; step 3: wrap the foam core layer over the inner layers; step 4: vacuum press the foam core layer onto the inner layers; step 5: wind the outer layers; step 6: vacuum press and heat to solidify the entire product; step 7: demould and finish the product.

Abstract: A shock absorber structure to absorb vibrations in multiple directions. The shock absorber structure includes a horizontal shock absorber assembly to absorb horizontal vibrations, a vertical shock absorber assembly to absorb vertical vibrations, and a horizontal shock absorber assembly linked to the vertical shock absorber assembly through a cam. Main body assembly to connect the horizontal shock absorber assembly and vertical shock absorber assembly. The horizontal shock absorber assembly includes the bridge deck pillar, spring shaft, sliding shaft, and the first elastic element. The longitudinal shock absorber assembly includes traction ear, first bushing, second bushing, centering shaft, second elastic element. The vertical shock absorber assembly is arranged perpendicular to the horizontal shock absorber assembly.

Abstract: The invention proposes a method to compensate for coning, sculling, and scrolling errors in a strapdown navigation system using a calculation technique that avoids using trigonometric and rounding functions. This method minimizes calculation errors and reduces computational load by eliminating the need for performing directional vector product multiplication twice. The technical solution used to compensate for motion errors that cause angle calculation errors is based on a function that approximates the calculation errors between methods, allowing the selection of the appropriate calculation method and rounding degree. The solution to compensate the velocity and position motion errors is achieved by above accurate angle error compensation.

Abstract: A Ka band monopulse antenna system with a compact size (diameter: 160 mm; height: 25 mm). The monopulse antenna system consists of a monopulse comparator; an unequal power divider and an array of 448 radiating slot antenna elements. The research results of the invention are as follows: the antenna operates in the Ka band frequency range; the realized gain at the center frequency is 34.2 dBi; the sidelobe level of the sum beam on the two E and H planes is less than ?25 dB; the difference between the two peaks of the beams on the difference beam is small (about 0.1 dB); the peak-null difference of the difference beam is greater than 43 dB.

Abstract: An autonomous power regulation method enhances quality of the received signal under severe conditions such as weak signal, unbalanced power among antennas, and not identical power among subcarriers. The improvement in signal quality also means the better performance of the physical uplink control channel format two in the fifth generation mobile network. In terms of antenna index, symbol index, and subcarrier type, power of the received signal is autonomously compensated as the following four steps: step 1: sequence generation and reference calculation; step 2: signal extraction and magnitude calculation; step 3: threshold generation, gain calculation, and power regulation; step 4: channel estimation, channel equalization, channel decoder, and statistics. With various types of the received signal power level and wide range of signal-to-noise ratio, the provided experiment results prove that the autonomous power regulation method is effective, reliable, and versatile.

Abstract: The invention proposes a system to compress reflected signals on a fluctuating noise background applied to active surveillance radar systems. This is a new, simple and effective solution to compress signals before sharing or transmitting to the processing center. Unlike previous systems based on performing compression on each reflected pulse, this transparent proposed system processes reflected regions in the form of a two-dimensional (2D) correlation matrix, combined with the dynamic calculation, automatically accumulates and adapts to changes; the convolution and compression algorithms are simple and effective since they are associated with the characteristics of active radar reflected areas in both frequency and time domains. Thanks to that, the system proposed in this invention provides effective and superior compression performance compared to the proposed systems.

Abstract: A system for effectively determining the motion state of a device based on the quality of radio signals received between scan intervals, comprising the following steps: radio signal reception, elimination of interfering radio signals, and finally, determination of the motion state of device. This novel method is useful for cyclic positioning and monitoring devices. It extends battery life per charge by reducing the occurrence of false motion detections. Additionally, the solution can help reduce hardware costs by eliminating the need for a motion sensor module.

Abstract: The invention addresses a method for simultaneously retrieving NTRIP data streams and transmitting positioning data using a 4G network for low-cost RTK positioning systems. This method employs the PPPoS protocol and the LwIP library, along with the implementation process of applying this method to real-world systems. The approach enhances data update rate and ensures high accuracy with a superior RTK “Fixed” positioning rate for affordable RTK systems, significantly optimizing hardware system costs. The effectiveness of the invention has been demonstrated through practical testing, showing a marked improvement and complete resolution of the limitations associated with the previous AT command method.

Abstract: The invention provides a method to build a machine translation model using syntactic information from another language to Vietnamese and vice versa. Specifically, the invention enhances machine translation quality by incorporating syntactic information into the model. Current machine translation models in the market learn syntactic information as features during the training process. However, this approach may not capture sufficient syntactic information, leading to inaccuracies in translation and contextual errors. Therefore, the invention focuses on exploiting syntactic information from the training data, aiming to produce accurate and contextually correct translations.

Abstract: A method for determining a salient object in an image based on superpixel analysis consists of initializing superpixels using SLIC algorithm and merging of adjacent superpixels that have similar color distribution. Then, calculate the spatial and color distribution correlation between the superpixels after being merged. Combined with the statistics of the occupancy rate, the distance to the original image center, and the global contrast of the superpixels, calculate the saliency evaluation vector for each superpixel. Finally, interpolate the saliency for each pixel in the superpixel.

Abstract: The present invention provides a method of finding service endpoints that can be customized. The method includes the following steps: step 1: discover the “services” customized by the CSDE method, called the “services” CSDE; step 2: discover groups of running Pods belonging to the respective CSDE “services”; step 3: register the IP of the Pod to the corresponding CSDE “service” according to the requirement to use a specific network range. The method is deployed to the corresponding CSDE application for installation in a container virtualization environment.

Abstract: The high-speed search matching method with a large-scale heterogeneous database includes the process of extracting and storing the user's registered image features, forming a database, and being a reference when matching and searching; The process of initializing the search engine, in which two objects in the search engine are initialized, including a matching object, calculating the distance, and a data table object to determine the target search object for each input image sample; The process of matching and searching for objects, including the process of calculating the distance between the features and determining the target array, and finally comparing and returning the final result. The proposed method has demonstrated the ability to calculate accurately as well as very high performance, especially in large-scale data processing cases.

Abstract: The session persistence method in the microservice system in the cloud environment provides a session persistence mechanism with a specific “instance” by session identifier. The method ensures the continuity of requests with the same identifier. In addition, the method brings the benefit of resource optimization when only one resource management “instance” is required for each session. The method includes the following steps: building a session management service model; allocating and storing session identifiers; monitoring, tracking, and updating session identifiers.

Abstract: The high-speed flipping mirror system consists of a reflective mirror, linear motor, flexure, position sensor, mirror mount, and sensor mount to meet the requirements of the working environment, ensuring both high-speed scanning, light of sight stabilization to serve panoramic surveillance tasks; the mechanism has a rigid structure, good stability, and high vibration and shock resistance; the mechanism is suitable for application in wide scanning electro-optical systems with stringent image sharpness requirements to perform panoramic surveillance.

Abstract: The invention relates to a two-dimensional (2D) virtual clothing fitting system using machine learning technology and a deterministic classification algorithm. The system allows the construction of a two-dimensional (2D) digital interactive image between a cloth and the user's body instead of using a graphic engineer to simulate it. Machine learning models of image processing combined with a deterministic classification algorithm reproduce the user's image combined with the garment image and transform the cloth image according to the user's size.

Abstract: An algorithm for selecting a new suitable AP for STAs in a mesh network and a method for exchanging data between APs built according to the IEEE 1905.1 standard. The active search helps reduce the latency when STAs move in the coverage area of the mesh network, ensuring service performance and maintaining stable connections. The vender message are specifically defined to ensure that the roaming process is not interrupted and that the service remains stable during the transition.

Abstract: The invention relates to a method of calculating gating scores in the pulse-Doppler radar using a combination of position, power, size of detection and ambiguous Doppler measurement data to effectively overcome the phenomenon of wrongly assigning detections to the target trajectory and creating false targets in noise regions. The method intelligently merges position, power, detection size and ambiguous Doppler measurement data information of the detections in the algorithm of calculating gating score to solve the problem of selection and disputation detections. The method is carried out through two steps, step 1: determine statistical quantities from the standard data set; step 2: gating selection algorithm.

Abstract: The method of controlling service load selectively by session in the telecommunications charging system is designed to ensure stable system operation even when the load exceeds the system's capacity. The method consists of three steps: Step 1: the charging system determines the overload status of the system; Step 2: The charging system selectively bypass or accept request according to conditions and has a status memory; Step 3: The charging system analyzes and reprocesses the saved charging requests.

Abstract: A method for filtering and removing false targets caused by sidelobes in pulse compression calculates the target filtering threshold to differentiate and eliminate false targets caused by sidelobes in pulse compression. It is applicable in radar signal processing systems using the polyphase P3-coded waveform (the P3 code) for both transmitted and received signals. This method leverages the characteristics of the P3 code's pulse compression output. Specifically, the sidelobes appear symmetrically on both sides of the main lobe, and the distance between the main lobe and the sidelobes is approximately equivalent to the pulse width of the transmitted signal, extending to both sides of the main lobe. For each pulse width of the signal, this distance is fixed and can be predetermined. Experimental results on radar systems have demonstrated that the proposed method effectively filters out all false targets caused by sidelobes in pulse compression.

Abstract: A wide-stopband high-frequency band-pass filter using L-shaped slotted microstrip resonators, where the filter's nearest spurious frequency is approximately 3.5 times the center frequency f0. The filter consists of the following components: dielectric substrate, copper layer, L-shaped slotted microstrip resonators, 50-Ohm impedance microstrip lines, and high-frequency connectors. The microstrip filter is implemented on a two-layer printed circuit board, designed by resonantly coupling the L-shaped slotted microstrip lines. It features a compact size and a wide stopband using a completely new resonant pattern, the L-shaped slotted microstrip line, which creates a filter with a wide stopband of approximately 2.5 f0. This design is significantly smaller than conventional filters at the same frequency that have a narrower stopband. The input and output high-frequency connectors are directly connected to the resonator through inductive or capacitive coupling via the 50-Ohm impedance line.