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This paper describes a system for evaluating flight of fixed-wing aircraft. During the flight of an aircraft, flight parameters are obtained and transmitted to the ground station by means of wireless communication. These flight data are received by the ground station and are calculated so as to get the...

Characteristics and technical difficulties of long– flight-time solar powered UAV airborne power and energy storage system was studied, and a general design method based on energy balance relation and aerodynamic parameters was proposed. The relation formula between key parameters such as solar cell...

The firing method for naval gun to fire on shore based on UAV (Unmanned Aerial Vehicle) extends observation range of warship, and it is a remote firing method that can be widely used. At first, this paper describes the flow for naval gun to reconnaissance and firing correction based on UAV. And then...

Cohesion and coherence are essential elements that have a role in forming structural coherence and coherence of the meaning of discourse texts. The formation of a coherent structure and semantic relationship cannot be separated from using the correct elements of cohesion and coherence, which are marked...

IETF has specified Mobile IPv4 and Mobile IPv6 in RFC3344 and RFC3775 respectively, but not yet discussed Mobile IPv4/v6 in any published RFC. This paper proposes a scheme to solve one of Mobile IPv4/v6 problems which Home Agent (HA) locates in IPv6 network, and Correspondent Node (CN) locates in IPv4...

Complex of cell-THPC-thiourea-ADP with lanthanide metal ions Dy3+ has been prepared. The thermal stability and smoke suspension of the samples are determined by TG, DTA and cone calorimetry. Experimental data show that for the complexes of cell-THPC-thiourea-ADP with the metal ions, thermal decomposition...

UAV technology plays an increasingly important role in modern warfare. This paper introduces the development of UAV technology and equipment, improving the situation, pointing out the advantages and importance of the development of UAV technology in modern warfare, focusing on the performance of several...

Flexible polyurethane foam has been treated with borax, expanded graphite (EG), EG/borax as flame retardant, respectively. The thermal degradation of samples has been studied by thermogravimetry (TG) and differential thermogravimetry (DTG) in air. From the resulting data, kinetic parameters for different...

Recent developments of EEDI (energy efficiency design index) which is an indicator of ship’s energy efficiency level imposed the cost effectiveness of sea-going vessels. Optimization of the ship’s total energy system is studied in this paper. This study is focus on optimum load sharing control, which...

Reference is deixis following the context of the language so that it always changes and appears in various situations and language events, resulting in the meaning of the reference in one lingual unit being different. This study examines the form of person and time deixis and their forms of reference...

In this study, an acid and alkali resistance cationic polyacrylamide flocculants (P(AM-MAPTAC)) was synthesized through copolymerization of acrylamide (AM) and methacrylamido propyl trimethyl ammonium chloride (MAPTAC) by innovative ultrasonic initiation technology. The structure and thermal decomposition...

Unmanned Aerial Vehicles (UAVs) can be utilized as wireless relays or mobile Base stations (BS) for providing dependable communications and supreme attention for ground devices. UAVs is flexibly employed for enabling fast network access in diverse applications, like disasters, and monitoring. It effectively...

This paper focuses on the actuator fault detection for UAV. Firstly, the longitudinal dynamics model of UAV with actuator faults and atmosphere turbulence is given. Based on this, an observer-based fault detection filter is applied for residual generation, and a performance index is introduced, which...

Quadrotor Unmanned Aerial Vehicle is a kind of UAV, which is disturbed easily and has nonlinear and strong coupling characteristics. In the paper, the model of Quadrotor Unmanned Aerial Vehicle is presented, then the adaptive sliding mode control laws is designed based on the model. And the disturbance...

In recent years, with the continuous expansion of the transmission network, power grid operation maintenance line mileage rapid growth and power network operation maintenance relatively insufficient number of personnel between the contradictions appear gradually, is bound to promote the power grid operation...

In this paper, the recognition algorithm of dynamic gestures, which based on depth information, is proposed. A new human-computer interaction controlled by dynamic gestures is also achieved. The proposed algorithm extracts Histogram of Oriented Gradients (HOG) and weighted Hu invariant moments from RGB...

Image registration technology is extremely significant in the virtual scene, automatic navigation, computer science, remote sensing image processing and many other aspects. It takes lots of difficulties for video tracking owing to the UAV platform is always unstable. In this paper, we utilized improved...

A critical limitation for the current use of Unmanned Aerial Vehicles (UAVs) is represented by the lack of aerial refueling capabilities. This paper describes the results of an effort on the modeling of the refueling soft hose realized by FEM techniques and on the algorithms of the docking control. The...

Nowadays large numbers of multiaxial UAVs are applied in the civilian field. The security of operating UAV has been upped to new levels. It has now become urgent to solve the problems of training high-quality UAV operators and effectively evaluating their training results. The article attempts to introduce...

Cost and communication challenges: High deployment of remote-controlled aerial drones in urban regions and crowded airspace have presented another challenge to overcome in achieving high deployment numbers in urban spaces as well as densely populated airspace from such remote-controlled aerial drones....

Epoxy resins modified with low-viscosity hyperbranched epoxy were prepared. The tensile strength, flexural strength, impact strength, fracture toughness, glass transition temperature (Tg) of the cured samples were investigated. The results show that the addition of hyperbranched epoxy improves the overall...

As the development of electric technology and artificial intelligence, the utilization of unmanned aerial vehicles gradually increases. Unmanned aerial and artificial intelligence are applied to replace human force and enhance the productivity in many fields including agriculture. In 1950, America began...

New free radical-cationic hybrid photopolymer, consisting of acrylate-based and epoxy-based photosensitive resin for stereolithography was prepared. The influence of the initiator sort and amount on the curing degree of the photopolymer was investigated. Photopolymerization process, degradation temperature,...

Real-time stitching is a research focus of UAV area. The speed and accuracy of stitching algorithm are both important for commanders to make right decisions in battlefield. In this paper, a real-time UAV aerial image stitching algorithm based on predicted region matching is proposed. A new matching strategy...

In this study, the pyrolysis of Zichang˚Coal (ZC) was investigated by thermogravimetry (TG) using three˚Catalysts, and the yields of the products obtained from pyrolysis, as well as gas˚Composition, were investigated by gas˚Chromatography (GC) using a fixed-bed reactor. The˚Catalytic mechanism was discussed...

Nanocrystalline CeO2 powders were synthesized using stearic acid and cerium nitrate by sol-gel and self-propagating combustion coupled method. Influence of various molar ratio of stearic acid and cerium nitrate on the products grain and colour were discussed. Powder appearance, crystal phase, specific...

Transmission line localities in China is topography complex. Natural conditions and artificial patrol way need to spend a lot of manpower, which is inefficient. Thus transmission inspection based on unmanned aerial vehicle (UAV) has been attracting the attention of relevant researchers since produced....

UAV is increasingly popular in the field of military, civil and scientific research, since its low loss, strong adaptability and high mobility. This paper introduces the design and implement of the visual tracking system based on the rotor UAV, and gives the UAV a function of continuous and stable tracking...

Communication networks frequently malfunction during dis- asters, making emergency response and recovery operations more difficult. Unmanned Aerial Vehicles (UAVs) provide a quick fix by reestablishing communication via Bluetooth, Wi-Fi hotspots, mesh networks, and LTE relays. They are essential in catastrophe...

Nowadays, the rapid development of UAVS has a great application prospect both in military and civilian areas. However, the short duration of the UAV has limited the continuity of its work , and it need someone to replace the battery. We propose a UAV autonomous charging method of the multi-information...

The multi-unmanned aerial vehicle (UAV) must autonomously perform reconnaissance-attack-evaluation tasks under multiple constraints in the battlefield environment. This paper proposes a nearest neighbor method designed with the shortest neighboring distance as an indicator which quickly solves the optimal...

On the basis of analyzing the tactical characteristics and the mission requirements of UAV, a route planning model is established, which is composed of a comprehensive threat model, a performance constraint model and a mission effectiveness model. A dual population genetic ant colony algorithm is designed,...

using small commercial UAV equipped with a simple visible light camerato obtain the depth information of power line and the ground through monocular or binocular vision is the focus of the research. And how to use digital image processing method to extract the power linerapidly, accurately, automatically...

The distinct effects of rock joints and the initiating firing pattern on the consequences of blasting in terms of rock fragmentation and generated ground vibration are both substantial. The integrated consideration effect of rock joints along with the spacing burden ratio and firing patterns, which enables...

As a newly developed simple and effective optimization technology, the fruit fly optimization algorithm (FOA) has been successfully applied in many fields. To accelerate the algorithm convergence and avoid the local optimum, the enhanced FOA based on quantum theory called QFOA is proposed in this paper....

With the wider application of unmanned aerial vehicle (UAV), automatic navigation capacity plays an important role. Navigation for UAV is the algorithm that automatically find out the obstacle-free, smoothing path from start position to target position. Current most navigation algorithms for UAV still...

For uncooled LWIR system function limitations and lack of real-time image processing problems. The design scheme of high performance uncooled LWIR image processing system based on UAV system platform is proposed. The solution uses TI's TMS320C6657 DSP and Altera's EP3C25F324 FPGA processor as the system...

In the current scenario, the aim of mining operations is to obtain as much usable ore as possible while maintaining a safe and profitable working environment. In open-pit mining and quarrying operations, the stability of slopes is of the utmost importance from both an economic and a safety standpoint....

Solo operation of multi-unmanned Aerial Vehicle (UAV) will be the trend of future, and operators play a significant role in the UAV supervisory control system, but human may be impacted by all kinds of factors, which may decline the performance of UAV system. In this paper, modeling is conducted for...

In the disturbed case, since the parameter tuning method is imperfect, there have been issues of excessive overshoot and adjusting time in MFAC. To optimize MFAC controller, a MFAC-ABC is proposed, with ITAE criterion as the fitness function, and key parameters of _kand are optimized and tuned using...

Unmanned aerial vehicles (UAVs) face significant challenges in dynamic obstacle avoidance despite their broad applications in agriculture, logistics, and emergency response. Existing methods, such as sampling-based RRT and graph-based Dijkstra algorithms, often struggle with dynamic environments and...

Based on the analysis of UAV Mission requirements and tactical characteristics, this paper attempts to establish a Route Planning model which includes comprehensive threats model, performance constraints model and mission effectiveness model. A dual population genetic ant colony algorithm is designed,...

This paper presents a Model-Based approach to develop UAV (Unmanned Aerial Vehicle) autopilot software. It employs Simulink to design the flight controller, Stateflow to implement control logic and Matlab coder to automatically generate embedded C code from the model developed. Software in the loop (SIL)...

TiO2-SiO2 film were prepared by sol-gel process. The prepared samples of these films have been characterized by FT-IR spectroscopy, TG-DTA, XRD and AFM. The transmittance of these films is tested by UV-VIS spectroscopy. The results show that the double doped glass antireflection film antireflection performance...

Natural silk fibers were used as the template to synthesis biomorphic Fe2O3 fibers. Silk fibers were first immersed into a Fe(NO3)3 solution and then sintered in air at high temperatures to produce the final Fe2O3 fibers. Their microstructures, phases, and synthesis process were analyzed. The results...

Due to the CCD array and scenery relative motion, the image quality would be degraded. In order to get the relationship between the CCD array move quantity and the image quality, the corresponding degraded images are achieved by changing the CCD array velocity, pitch, roll and yaw variation. Then, the...

IETF has specified Mobile IPv4 and Mobile IPv6 in RFC3344 and RFC3775 respectively, but not yet discussed Mobile IPv4/v6 in any published RFC. This paper proposes a scheme to solve one of Mobile IPv4/v6 problems which Home Agent (HA) is located in IPv4 network, Correspondent Node (CN) is located in IPv6...

With the development of technology, unmanned aerial vehicles (UAVs) are increasingly utilized in civil applications. Several provinces and cities in China are vigorously developing the low-altitude economy, with industrial environments gradually maturing. However, traditional A-star algorithms produce...

The proportional-integral-derivative control (PID) is the most popular approach in industry and commerce, due to its simplicity, low cost and effectiveness. Unmanned aerial vehicles (UAVs) have been used widely nowadays, focusing on agriculture, recues and other fields. Quadrotors have nonlinear and...

Research the pyrolysis kinetics of eucalyptus and the absorption band and characteristic peaks of volatile pruducts under the heating rate 10?•min-1, 30?•min-1, 60?•min-1respectively. The experimental results show that eucalyptus pyrolysis process can be divided into 3 stages: moisture volatilizes stage,...