Miracle-dz/UniFAR-FTUs huggingface dataset:
3 -D positioning system based on linear CCD camera

A calibration method was presented for a three dimensional positioning system. Three high -resolution linear CCD (charge coupled device) cameras with wide -angle lens were used to provide a large field of view, but image errors due to large lens distortions occured as well. A modified camera model was used to correct the distortions. The proposed calibration procedure consists of two steps to correct the lens distortion and to avoid non -orthogonality problems arising in the ordinary direct linear translation (DLT) method. The performance of the calibration procedure was tested with real images, with a 1‰ accuracy achieved. The method can be extended to various photogrammetry applications.
Study on turbine aerodynamics design of small turbofan engines

The characteristics of the flow through the small turbine components were analyzed in detail based on the mission and operating conditions.It was shown that the effect of boundary layer and secondary flow,including passage vortex,trailing vortex and tip clearance flow,etc,was remarkable.This was determined by the small-scale and high rotating-speed as the basic features of small turbine.By investigating the aerodynamic design ideas and concrete methods of small turbine component,a new turbine for a small turbofan engine with the thrust of 1000daN was designed.The results of 3-D viscous numerical simulation show that,the turbine meets the design requirements with high efficiency.
Anomaly Analysis Technology Based on Deterministic Characteristics of Intranet

An enterprise intranet has the characteristics of service determination, limited network components, descriptive and observable characteristics, and the state of network components and network interaction behaviors need to strictly comply with security policies. Therefore, a variety of descriptive certainty can be used to describe the subject, object, and action of the network access. According to this important feature, the anomaly analysis method is simplified, and the abnormal discovery of the intranet is transformed into the problem of network dynamic feature collection and deterministic feature characterization. Based on the network state and behavior collection and analysis network dynamic characteristics, combined with the deterministic feature priori knowledge of the network, an anomaly analysis model which is especially suitable for deterministic intranet is proposed. Based on the model design, a traffic-based anomaly analysis system is implemented. The system can effectively find a variety of high-risk anomalies in the intranet.
Secondary flow analysis for non-axisymmetric endwall on the high-load compressor cascade

The effectiveness of a non-axisymmetric endwall on a high-load compressor cascade was discussed.First of all,the trigonometric function was used to complete non-axisymmetric endwall profiling.Then the method of calculating the mixed-out secondary loss for the compressor cascade was established.Finally,the detailed numerical simulations were conducted on the cascade flow field with non-axisymmetric hub endwall.Numerical results show that with the non-axisymmetric hub endwall,the loading distribution near the endwall would be changed and the secondary loss would be reduced in both the design and off-design condition.It has been indicated that the mass average total pressure loss can decrease by 9.4% in the design and by 7.7% and 11.8% in the off-design condition(±3°),respectively.When the non-axisymmetric contour height equals to be 4% of blade span,the secondary flow loss should be the lowest.
Real-time power system dynamic security assessment based on advanced feature selection for decision tree classifiers

This paper proposes a novel algorithm based on an advanced feature selection technique for the decision tree (DT) classifier to assess the dynamic security in a power system. The proposed methodology utilizes symmetrical uncertainty (SU) to reduce the data redundancy in a dataset for DT classifier-based dynamic security assessment (DSA) tools. The results show that SU reduces the dimension of the dataset used for DSA significantly. Subsequently, the approach improves the performance of the DT classifier. The effectiveness of the proposed technique is demonstrated on the modified IEEE 30-bus test system model. The results show that the DT classifier with SU outperforms the DT classifier without SU. The performance of the proposed algorithm indicates that the DT classifier with SU is able to assess the dynamic security of the system in near real time. Therefore, it is able to provide vital information for protection and control applications in power system operation.
RHALSA: Ranking Hotels using Aspect Level Sentiment Analysis

Opinion play a vital role which impacts the business in large extent. Users by-and-large depend on the reviews of others to avail the services. Online hotel bookings are becoming popular because of mobile applications being used on smart phones for placing the bookings from far away in advance along with the access to their reviews on different aspects. In this work, we present a data mining algorithm to rank the hotels based on the reviews provided by the users using aspect level sentiment analysis. The proposed Ranking Hotels using Aspect Level Sentiment Analysis (RHALSA) algorithm is evaluated conducting experiments on Tripadvisor data set to demonstrate its adequacy.
Transition from Near Field to Far Field of Echoes from Simple Shape Targets in Water

This paper studied the transitional characteristics of underwater simple shape targets from near field to far field. In order to describe the near field echo characteristics of targets, a new parameter—? 〆cho strength (ES) is defined. Also the near field planar element method is presented to calculate the near field of acoustics scattering. The transitional characteristics are obtained for the simple shape targets such as a sphere, an elliptic cylinder and a prolate spheriod. The results provide a theoretical base for the range choosing in measurement of target strength.
Numerical Simulation on Turbine Flowmeter for Measurement of Gas-Liquid Two-Phase Flow and Experiment Verification

Based on two-phase turbulent flow model,the numerical simulation of gas-liquid two-phase bubble flow in a turbine flowmeter was investigated with Fluent software when the volume void fraction was less than 10%. A method to evaluate the performance of turbine flowmeter by meter factor variation was put forward.The internal flow fields of flow-meter were analyzed.The result shows that with the rise of volume void fraction at inlet,the air phase volume fraction at the suction side and the rear of blade explicitly increases,which leads to the rise of meter factor variation.According to the com-parison of simulated value of meter factor variation between the existed and improved flowmeter,the rotor structure of the existed flowmeter was improved.Through the experiment on the gas-liquid two-phase flow facility in School of Electrical Engineering and Automation of Tianjin University,the validity of the improved design for turbine flowmeter was verified.
3D-FEM Simulation of Soil Pile Interaction for Offshore Wind Power Generation

According to the basic type of pile of offshore wind power generation,the contact element method(CEM) and surface effect element method(SEEM) are used to establish three dimensional solid FEM model of soil,pile and pile body,respectively.Taking the interaction of soil and pile in typical offshore wind power generation for an example,two kinds of FEM models for soil pile interaction analysis are given by using CEM and SEEM.The result shows that the SEEM has faster convergence speed than the CEM;but it has lower accuracy;at the same time,the SEEM has better accurate than the traditional m-method.Thus,it provides reference for FEM analysis of interaction of soil and pile for actual offshore wind power generation.
Internal Defects Influence of 500kV AC Composite Insulator on the Electric Field Distribution Along the Axis

The bonding interface between the rod and the sheath of composite insulators,which through both ends of the insulator is an integral part of the inner insulation.If the bonding of the composite insulators' rod and sheath is not closely,the air gap between the rod and sheath will affect the electric field,and the mechanical properties of the rod will be reduced in the high intensity electric fields for a long time.On the basis of a rupture accidents of a 500 kV AC composite insulator,in order to calculate the distribution of electric field,we established a overall model and a sub-model by using the ANSYS code,and analyzed the influence of air gap.The simulation results show that the electric field around the air gap increases remarkably but is not high enough to cause partial discharge.Water can infiltrate into the gap,and strength of the electric field around the gap is higher than that of the air breakdown field,causing partial discharge and reducing the adhesion of the interface.When mandrel is exposed after the shealth being damaged,erosion can influence its mechanical properties,and finally cause breakage.
Moving Target Detection Algorithm for Forest Fire Smoke Recognition with Improved ViBe

In order to discover the forest fire at the early stage, the video based fire smoke detection system should be developed. This paper proposes an improved ViBe algorithm to overcome the drawbacks of ViBe which is widely used in forest fire smoke recognition. To make the algorithm faster, the improved ViBe algorithm introduces a switch variable to control the model updating every 2 frames. Also, the new ViBe algorithm contains a method to detect if the scene is changing, and upon finding the changing, a fast updating strategy would be used to increase the adaptive ability. The experiments are done from 2 aspects, to test the time consuming and adaptive ability of the improved algorithm. The experiments results show that the improved ViBe algorithm has better performance compared to ViBe algorithm and GMM algorithm, and can detect the forest fire smoke accurately in different conditions.
Towards a programmable and virtualized mobile radio access network architecture

Emerging 5G mobile networks are envisioned to become multi-service environments, enabling the dynamic deployment of services with a diverse set of performance requirements, accommodating the needs of mobile network operators, verticals and overthe-top service providers. The Radio Access Network (RAN) part of mobile networks is expected to play a very significant role towards this evolution. Unfortunately, such a vision cannot be efficiently supported by the conventional RAN architecture, which adopts a fixed and rigid design. For the network to evolve, flexibility in the creation, management and control of the RAN components is of paramount importance. The key elements that can allow us to attain this flexibility are the programmability and the virtualization of the network functions. While in the case of the mobile core, these issues have been extensively studied due to the advent of technologies like Software-Defined Networking (SDN) and Network Functions Virtualization (NFV) and the similarities that the core shares with other wired networks like data centers, research in the domain of the RAN is still in its infancy. The contributions made in this thesis significantly advance the state of the art in the domain of RAN programmability and virtualization in three dimensions. First, we design and implement a software-defined RAN (SD-RAN) platform called FlexRAN, that provides a flexible control plane designed with support for real-time RAN control applications, flexibility to realize various degrees of coordination among RAN infrastructure entities, and programmability to adapt control over time and easier evolution to the future following SDN/NFV principles. Second, we leverage the capabilities of the FlexRAN platform to design and implement Orion, which is a novel RAN slicing system that enables the dynamic on-the-fly virtualization of base stations, the flexible customization of slices to meet their respective service needs and which can be used in an end-to-end network slicing setting. Third, we focus on the use case of multi-tenancy in a neutral-host indoors small-cell environment, where we design Iris, a system that builds on the capabilities of FlexRAN and Orion and introduces a dynamic pricing mechanism for the efficient and flexible allocation of shared spectrum to the tenants. A number of additional use cases that highlight the benefits of the developed systems are also presented. The lessons learned through this research are summarized and a discussion is made on interesting topics for future work in this domain. The prototype systems presented in this thesis have been made publicly available and are being used by various research groups worldwide in the context of 5G research.
Branching Undo/Redo Mechanism Based on Variadic Parameter Command Pattern

Traditional linear undo/redo mechanism cannot backtrack to some special history nodes. For example, the users undo to a previous state and then submit a new operation. In this case, the undone history node cannot be recovered anymore. To solve this problem, a branching undo/redo mechanism that can retain all the undone history nodes is proposed. Its undo/redo realization based on command pattern is detailed. Besides, a new universal variadic parameter command pattern is proposed to overcome the disadvantages of classic command pattern. The variadic parameter command pattern can be adapt to different command receivers and different receiver actions with different action arguments.
Simulated annealing algorithm for solving pickup and delivery problem with LIFO, time duration and limited vehicle number

Nowadays, the process of delivering goods or documents from one place to another can be done faster by utilizing a courier service. This courier must be able to create a travel route to pick goods and deliver them with a short time. Route creation will be more difficult if there is a time window for each customer and the goods being transported are heavy or dangerous items. In this case, the courier company must implement a last-in-first-out rules. In addition, with the limitation of vehicles number, companies have to minimize the number of underserved customers. This problem called pickup and delivery problem with last-in-first-out, time duration, and limited vehicle number. In this study, to solve the problem, simulated annealing algorithm was used for some dataset. To explore the solution space for the problem, this algorithm will use pair relocation operator. In several experiments, the results show a good solution and short computation time.
Behavior Based Control of A Mobile Robot in Unknown Environments Using Fuzzy Logic

This paper presents a new method for behavior based control of a mobile robot in uncertain environments using fuzzy logic. Behavior based control suffers from two difficulties:1The quantitative formulation of behavior:2The efficient coordination of conflicts and competition among multiple behavior. The main idea of the present study is to incorporate fuzzy logiccontrol with behavior based control such that:behavior is formulated by fuzzy sets and a rulebase;conflicts and competition among different behavior are coordinated by fuzzy reasoning.Simulation results show that the proposed method can be efficiently applied to robot navigation in complex and unknown environments by fusing multiple behavior,such as avoiding obstacles, following edges, and moving towards a target,and so forth. In addition, this method is suitable for robot navigation by multisensor fusion and integration.
Dysarthric speaker identification with different degrees of dysarthria severity using deep belief networks

Dysarthria is a degenerative disorder of the central nervous system that affects the control of articulation and pitch; therefore, it affects the uniqueness of sound produced by the speaker. Hence, dysarthric speaker recognition is a challenging task. In this paper, a feature‐extraction method based on deep belief networks is presented for the task of identifying a speaker suffering from dysarthria. The effectiveness of the proposed method is demonstrated and compared with well‐known Mel‐frequency cepstral coefficient features. For classification purposes, the use of a multi‐layer perceptron neural network is proposed with two structures. Our evaluations using the universal access speech database produced promising results and outperformed other baseline methods. In addition, speaker identification under both text‐dependent and text‐independent conditions are explored. The highest accuracy achieved using the proposed system is 97.3%.
The Experiment Research on the MAV Aerodynamics Character Effected by Planforms

The fixed-wing micro aircraft vehicles(MAV),which works under a low Reynolds number,have encountered certain kinds of aerodynamics problem.Different scales models of rectangular wings,mixed wings,trapezoid wings,Zimmerman wings and inversed Zimmerman wings were designed and force measuring experiment has been carried out in D6 wind tunnel in BUAA.Compared aerodynamics characters of those model,this paper points out that mixed wings,trapezoid wings and Zimmerman wings benefit from the leading edge vortex and have a good performance on lift character.The vortex,which improves the lift performance under the large attack angle,is strengthened on the low aspect wings.Large sweepback angle of trapezoid wing has a high stall angle.
Analysis of numerical simulation in reasonable span of concrete floor with thin-wall core box

To study the stress performance of the concrete thin-walled box floor and to analyze its reasonable span of the thin-walled core box floor under the condition of meeting requirements of bearing performance and functional, this paper used finite element analysis method, and established 10 different spans of the concrete thin-wall core box floor and ordinary solid floor. The mechanical properties of two kinds of floor in different load were studied through the comparison and analysis. Results show that with the span of 6.3~15.9 m, under the vertical load, compared the thin-wall core box floor with the solid floor in the same thickness, the vertical deflection difference of two floor is bigger in the span of 10.5~15.9 m, and the deflection of the thin-wall core box floor increases quickly as the growth of the span. The change of whole floor stiffness is not big, and in this span the application of thin-walled box floor saves material and reduces weight more than solid floor, which is relatively reasonable structural form.
RANCANG BANGUN SISTEM ADMINISTRASI KERJA PRAKTEK DAN TUGAS AKHIR BERBASIS WEB MENGGUNAKAN FRAMEWORK CODEIGNITER

Information system is a set of components that interconnect, collect, process, store, and distribute information to support decision making and supervision within an organization. Today the information system can not be separated with computer technology that feels growing rapidly along with our increasingly complex needs. These developments can be seen from the many organizations or institutions in various fields that use computerized systems to perform various jobs quickly and with great accuracy. The use of computerized systems is expected to minimize errors made by humans thereby reducing large losses. And can mengefisienkan time in completing the work quickly and accurately. One concept of building a computerized information system is dengfan MVC model. Model-View-Controller (MVC) is a concept introduced by the inventor of Smalltalk (Trygve Reenskaug) to encapsulate data along with processing (model), isolate from the process of manipulation (controller) and view to be represented on a user interface . The MVC architecture has the benefit of separating between model and view allowing multiple views using the same model. As a result, an application model component is easier to implement, test, and maintain, because all access to the model runs through this component. One of the frameworks that works based on the MVC concept is Codeigniter. Codeigniter is an open source web application framework that is used to build dynamic php applications. The main purpose of Codeigniter development is to help developers to work on applications faster than writing all the code from scratch. Because of the superiority of codeigniter that the system of practical work administration and the final task is built using the framework.
Review of Wideband Digital Channelized Receivers

Wideband digital channelized receivers have an important application in Electronic Warfare(EW)and wireless communication,especially in Electronic Intelligence systems(ELINT)and Radar Warning Receiver(RWR)systems.This paper introduces the channelized receiver systems and the structures of the channelized technique.And base on the analysis of the development history of the channelized Receivers,we can see that the channelized Receivers system trend towards wideband digital and the digital channelized technique trend towards nouniform channelized to make channelized Receivers more suitable to the modern EW.
The Vocational Education Quantity Prediction Using Neural Network

With the rapid development of the economics in China, the vocational education comes into a period of reform and development. But there is little investigation or analysis in this area. By using the artificial neural network, the rule hiding in data will be found, and the model can be established. In this paper, the linear system is used to analyze the vocational education quantity in Shanghai since 1980. Both the number of input vector and the number of sample affect the accuracy of prediction. The experiment result shows that the number of sample affects the accuracy more than the number of input vector.
Virtual Simulation and Movement Seizure Reliability Analysis of Typical Slat Mechanism

The typical leading edge slat is a system of single degree of freedom with redundant drivers.During work process,uncoordinated movement in both sides may lead to the whole mechanism seizure,which has the bad influence on the performance of the aircraft.Therefore,based on multiple software platforms,a parametric rigid-flex coupling model for the slat was established.By simulation,dynamic response of the mechanism in the typical case and the influence that the speed and the size of the gear impacted on the slat can be obtained.Finally,regarding movement seizure as typical failure mode and selecting the speed of gear and gear pitch circle radius as random variables,Monte-Carlo method was used to solve the reliability and the sensitivity of the slat mechanism,though which,the seizure reliability of the system and the normalized sensitivity was obtained.The results can provide some references for the performance evaluation and further optimization of the slat.