Abstract: A centrifugal pump separating gases from liquids pumps fluid containing gas comprises a pump housing divided into a working fluid chamber and an empty chamber by a baffle, the empty chamber connected to the working fluid chamber by an opening and connected to a gas separation assembly by a pumping chamber duct; an inlet for drawing liquid into pump, a outlet for pumping liquid outward and a separated gas exhaust port; an electric motor with protective cover drives an impeller cluster to create rotary movement; gas separator has a spring of sufficient hardness to control the gas discharge valve to open and close; this gas separator is connected to the empty chamber by the duct mentioned above and connected to the pump outlet by the bleed hole. During operation, when suction gas reaches a certain amount, reduced pressure at the pump outlet opens the valve to release the gas.

Abstract: The dual inlet exhaust design for the flying device incorporates easy-to-assemble designs with low number of components, suitable for limited space and small volume requirements, good performance. The exhaust is designed as a three-chamber cylinder with two coaxial inlet pipes running through the two chambers on both sides, extending into the middle compartment. The width of the two inlet tubes in the middle compartment is different. The inlet pipe at the two compartments on both sides has a bore. The outlet tube is located in the middle compartment, deviating to the side with a smaller expansion inlet, with the longitudinal axis of the outlet tube passing through the inlet tube.

Abstract: Method of exchanging information between Radio Remote Unit (RRU) and Baseband Unit (BBU) in Evolved Node B (eNodeB) when there is loss of synchronization of the Common Public Radio Interface (CPRI), including a) listening on BBU Small Frequency Factor (SFP) interface; b) when RRU detects an CPRI asynchronous event within a time period, conducting a hardware and software uncertainties test including the CPRI status, frequency, temperature, voltage, current and Radio Frequency (RF) operation; c) RRU converts checked uncertainty into text string; d) encoding text string into Morse code as binary bits 0,1; e) sending binary bits to the BBU by SFP module optical signal turning on and off; f) received data at the BBU SFP interface is encoded to Morse code, convert Morse code to text and writing file; and g) periodically checking the received text strings, collating them with predefined error codes, and take necessary trouble shooting steps.

Abstract: A system and method for controlling gas turbine engines with maximum thrust of less than 500 kgf. The control system includes electronic control unit (“ECU”), sensors and actuators. To ensure the requirement of compactness, physical control system simplicity but maintain stability and accurate operation for the engine, the control system does not include components such as Fuel Control Unit (“FCU”), alternator and corresponding rectifier circuits. A sensor, instead of alternator's wave form signal, is used to detect the rotational speed of the engine. Voltage regulation into the electric motor driving the fuel pump controls fuel flow, instead of the FCU. The control method consists of upper and lower limits computation calculation blocks of the control signal, and PID control algorithm block with coefficients designed to be suitable for the engine operating ranges. Control is implemented through a 7-step calculation process. Piecewise linearization modeling and tuning PID coefficients is also presented.

Abstract: Method of slowly moving target detection with application for coastal surveillance radars. This method improves the well know other methods and efficiently detects targets with a high accuracy. The proposed method consists of three steps that are: step of generation and processing of signals with complex modulation; step of target clustering and step of detection of slowly moving targets in clutter environments.

Abstract: The invention proposes a method for dividing archived data based on persistent queue (PQ), including i) dividing this stored data into persistent data queues corresponding to the time it needs to be processed in the future; ii) scheduling the processing of data that has been split into these persistent data queues corresponding to future milestones; and iii) redistribute stored data into new sustainable data queues corresponding to the next time it takes for further processing of this data.

Abstract: The purpose of the presented invention propose a spring-support mechanism for the parallel robot, and this mechanism is applied to parallel robot models to reduce the load on the actuators. The spring-support mechanism for the parallel robot are composed of: sets of rotated joints to adjust the direction of the support mechanism to match the direction of the moving frame of robot, rhombus mechanism with hinges in four vertices transform displacement of moving frame to elasticity of springs, guiding plates used to adjust the springs length so that the thrust force generated by springs is constant, set of springs is assembled parallel and fixtures for the springs.

Abstract: The Coaxial Angular Velocity Sensor System is an electronic sensor, which processes and supplies the output signal of the inertial angular velocity with high accuracy and great reliability. The device consists of the main components: angular velocity sensor, analog-digital converter, microcontroller, temperature sensor, power source, mechanical anti-noise-proof chassis. The device's microprocessor comes with a signal processing algorithm that helps increase the accuracy of the device's output. Because of its compact size, high precision, and low cost, the device is used in high precision devices such as UAV cameras, or in life applications such as self-balancing vehicles.

Abstract: A method to help developers manage ID values for big systems includes assigning an array with N values, an index is the value of allocated pointer, initially 0. Anytime an allocate function is called, this index value increases by 1 and is reset to 0 when the previous value is (N?1). The system calculate the fit position to assign released value in the array which is ready for allocation. If the system needs more than N values, the allocation request will be rejected. The method is useable for high performance and can be acceptable for big systems depending on the strategy to manage id values from the developer.

Abstract: The invention proposes the two-axis direct drive mechanical mechanism of a multi-sensor observation device for unmanned aerial vehicles. This is a mechanical mechanism to perform rotate pan-tilt axis by direct drive motor. This mechanism include main components: assembly pedestal, assembly pan-axis and assembly tilt-axis. Electronic circuits, encoders, mechanism, motor are optimized arranged and scientifically designed to the layout space and the weight of the structure. This mechanism can integrate optical sensors such as infrared cooling cameras, high resolution camera, laser rangefinder.

Abstract: The invention proposed the design of an optical system using the principle of Cassegrain telescopes for a long wave radiation range, which consists of two main components: the first component comprising the two reflective mirrors, in which surface distortion of mirror 1 is parabolic, surface distortion of mangin mirror 2 is aspheric; the second component is a relay consisting of three lenses: lens 1, lens 2, and lens 3 arranged after the medial image plane correspondingly; it plays an important role in fixing the pupil's position to match the position of the cold shield of the sensor and eliminating absolutely the aberration to ensure receiving good quality image at the sensor plane.

Abstract: A high magnification MWIR continuous zoom optical system is described herein that consists of the following components: a front detachable extender group, a fixed group for focusing incoming radiation, three moving groups for zooming and generating an intermediate image and a relay group. The mentioned optical system has the ability to work with MWIR radiation (3-5 ?m) and generate a thermal image from the gathered radiation. The system also has the ability to zoom continuously in a wide variable focal length range with a high magnification ratio of 20×. With the use of a cooled detector, the combined system allows its user to be able to receive high quality thermal images in all FOV configurations.

Abstract: Embodiments of the present invention proposes a method to automatically identify the flying targets by physical information (coordinates, heading, speed), time, and identification information (3/A code). This method includes two steps: features extraction and building machine learning model. In the features extraction step, features which are extracted include: cell indexes corresponding to coordinates, information of flight path, time in day/night format, heading, speed, and 3/A code, constructing n-dimensional vector. This vector is used as input for training a Random Forest model, to automatically identify class label of flying targets.

Abstract: This invention refers to hybrid coupler with the sum port and difference port located on the same side. The hybrid coupler can be efficiently integrated into the high frequency circuit with its simple structure, using common material. To achieve this purpose, the hybrid coupler in this invention consists of the following parts: sum port, difference port, output port 1, output port 2, connection line 1, connection line 2 and microstrip line.

Abstract: As the potential applications of unmanned aerial vehicles (UAVs) are growing, more sensors are installed on-board. One of the most important on-board equipments is Inertial Measurement Unit (IMU). Mechanical vibration of the IMU, which greatly hinders the accuracy of its, becomes an increasingly important issue. In this specification, an anti-vibration framework on IMU is provided. A design process of an anti-vibration system of the IMU will be shown and described.

Abstract: A wing deployment mechanism and a design method using a pneumatic cylinder with transmission spring system (assembly) are provided. The deployment mechanism comprises frame, wing, deployment cylinder, gas canister, rotation shaft, bolts, groove, locking pin, dowel pin, flange, first spring, second spring, dowel pin hole, looking pin hole, slider, third spring. The design method includes step 1: determining the problem's specifications; step 2: constructing the equations of motion; step 3: designing a primary scheme for a system of pneumatic cylinder with transmission spring. Step 4: determining the parameters for the system; and step 5: validating the design.

Abstract: The invention relates to a low profile antenna, operating over a wide range of frequencies. The dual-polarized wideband antenna consists of: radiating elements, ground plane, metallic walls, coaxial cables, split-ring slots. The antenna is fed by coaxial cables at feed points, which are surrounded by split-ring slots. The antenna can be utilized as an element in an array to provide particular radiation pattern.

Abstract: Methods of manufacturing high-temperature composite materials using carbon nanotube to improve the efficiency of insulation applied to propulsion systems for aerospace equipment including 5 steps: step 1: Select necessary materials and equipment, step 2: disperse MW-CNTs in the polar solution, step 3: distribute MW-CNTs evenly in the resin, step 4: eliminate residual solvents, step 5: curing phenolic resin composites.

Abstract: A power control and correction method capable of adapting to each type of transmission environment, addressing interference problems of user devices in the network, and ensuring good signal quality for signal decoding. The method adjusts and controls the receiver power adaptation according to the transmission environment in the eNodeB LTE system.

Abstract: The present invention proposes a method of industrial composite manufacturing. The method combines the resin transferring molding method with vacuum process and compression process in appropriate orders for achieving high quality products. In the curing process, microwaves are used to harden the plastic resin in the mold. Specifically, the main steps of the method are following: step 1: preparation of materials and equipment; Step 2: Disposition of the reinforced fibers/fabrics and mold closing at the extend position; Step 3: Vacuum and transfer plastic resin into the mold; Step 4: Mold closing by compression pressure; Step 5: Plastic resin curing by using a microwave system; Step 6: Open the mold and take the composite product.