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14th international conference on Pulsed Lasers and Laser applications

作者： Ososkov, Yan Zh. Chernutsky, Anton O. Dvoretskiy, Dmitriy A. Sazonkin, Stanislav G. Orekhov, Ilya O. Denisov, Lev K. Pnev, Alexey B. Karasik, Valeriy E. Bauman Moscow State Tech Univ 2nd Baumanskaya Str 5-1 Moscow 107005 Russia

ISBN: (数字)9781510634121

ISBN: (纸本)9781510634121

In this paper, we have developed a chirped-pulse Er-doped all-fiber ultrashort pulse (USP) laser suitable for high-resolution Raman distributed temperature sensor (RDTS) system application. Chirped-pulse regime which is determined by the positive net-cavity dispersion of +0.12 ps(2) allows us to increase the energy of the pulses for effective signal-to-noise ratio in receiving system. It also helps to avoid the influence most of nonlinear effects due to relatively long pulses duration of similar to 24.6 ps. The average power of the pulses is estimated to be similar to 1 mW from master oscillator, and currently increased up to similar to 15 mW by power amplifier. A relatively low repetition rate of similar to 7.925 MHz with signal-to-noise ratio similar to 69 dB was achieved using the resonator length of similar to 25.6 m. To characterize short-term stability of the obtained regime we have also measured the relative intensity noise of the laser, which is < -107 dBc/Hz in the range of 3 Hz - 1 000 kHz.

关键词： all-fiber erbium-doped fiber lasers ultrashort pulses femtosecond passive mode-locking single-walled carbon nanotubes chirped-pulse distributed temperature sensor

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HoneyGadget: A Deception Based ROP Detection Scheme 2nd

HoneyGadget: A Deception Based ROP Detection Scheme

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2nd Annual international conference on Science of Cyber Security (SciSec)

作者： Huang, Xin Yan, Fei Zhang, Liqiang Wang, Kai Wuhan Univ Sch Cyber Sci & Engn Key Lab Aerosp Informat Secur & Trusted Comp Minist Educ Wuhan 430072 Peoples R China

ISBN: (纸本)9783030346362;9783030346379

Return-Oriented programming (ROP) is a robust attack which has been proven to be Turing-complete. ROP reuses code segments named gadget in vulnerable applications and modifies control flow to achieve malicious attacks. Existing defense techniques for code reuse attacks attempt to restrict the policy of control flow transfer (e.g. CFI) or make locating gadgets a hard work (e.g. ASLR). However, decades of the arm race proved the ability to detect up-to-date attacks remains the Achille's heel. In honeypot, a general pattern for operators is spreading honeytokens and hunting spammers by capturing their malicious behavior. In order to capture the attack pattern of code reuse attacks, we present a novel deception based ROP detection model named HoneyGadget. HoneyGadget inserts various types of honey gadgets as tokens to some specific points of binary files where normal control flow would not reach and record their places once the application is loaded. During the execution, HoneyGadget uses Last Branch Record (LBR) to trace execution records. On performing a sensitive function call, HoneyGadget compares LBR records with the maintained address list, and terminates the program immediately if some records match. Since these honey gadgets will not be executed by normal control flow, there must be a ROP attack. We have developed a fully functioning prototype of HoneyGadget. Our evaluation results show that HoneyGadget can (1) capture ROP attacks actively and (2) incurs an acceptable overhead of 7.61%.

关键词： Return-Oriented programming Gadget insertion Deception Control flow Last Branch Record

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Hotel Room Price Determination Based on Dynamic Pricing Model Using nonlinear programming Method to Maximize Revenue

Hotel Room Price Determination Based on Dynamic Pricing Mode...

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international conference on Applied Information Technology and Innovation (ICAITI)

作者： Muhammad Fadly Ari Yanuar Ridwan Mohammad Deni Akbar Fakultas Rekayasa Industri Telkom University Bandung Indonesia

Dynamic pricing strategy is a pricing strategy that is often applied by hotels to maximize their income. The purpose of this study is to provide a pricing policy proposal in accordance with dynamic pricing models. This study provides a dynamic pricing model that has been adapted to the problems that exist in hotels with various types of rooms. This research consists of three stages, the first phase is predicting future demand. The second stage applying revenue management tools, namely dynamic pricing, to model the effect of prices on demand. Prices change dynamically based on the number of requests available. The third stage is using a nonlinear programming approach to maximize revenue. Forecast parameters and dynamic pricing models are estimated using historical sales data for one of the hotels in Bandung, West Java, Indonesia. The results suggest a pricing policy for superior and deluxe room types that can increase revenue by 27% more than the existing pricing policy. The proposed pricing policy is able to complete the method void in determining prices. In addition, the results of this study provide optimal room rates every day along the planning horizon.

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Block Architecture Problem with Depth First Search Solution and Its Application 2

Block Architecture Problem with Depth First Search Solution ...

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Joint Workshop of KO2PI / 2nd international conference on Mathematics, Science, Technology, Education, and their applications (ICMSTEA)

作者： Rahim, Robbi Abdullah, Dahlan Simarmata, Janner Pranolo, Andri Ahmar, Ansari Saleh Hidayat, Rahmat Napitupulu, Darmawan Nurdiyanto, Heri Febriadi, Bayu Zamzami, Z. Univ Malaysia Perlis Sch Comp Engn & Commun Arau Malaysia Univ Malikussaleh Dept Informat Aceh Indonesia Univ Negeri Medan Medan Indonesia Univ Ahmad Dahlan Dept Informat Yogyakarta Indonesia Univ Negeri Makassar Dept Stat Makassar Indonesia Komunitas Kolaborasi Publikasi Indonesia KO2PI Makassar Indonesia Politekn Negeri Padang Dept Informat Technol Padang Indonesia Indonesian Inst Sci Res Ctr Qual Syst & Testing Technol Padang Indonesia STMIK Dharma Wacana Dept Informat Metro Indonesia Univ Lancang Kuning Dept Informat Syst Pekanbaru Indonesia

Searching is a common process performed by many computer users, Raita algorithm is one algorithm that can be used to match and find information in accordance with the patterns entered. Raita algorithm applied to the file search application using java programming language and the results obtained from the testing process of the file search quickly and with accurate results and support many data types.

关键词： Computer programming

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Board games in the Computer Science Class to Improve Students' Knowledge of the Java programming Language: A Lecturer's Perspective 18

Board games in the Computer Science Class to Improve Student...

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2nd international conference on Education and Multimedia Technology (ICEMT)

作者： Jordaan, Dawid B. North West Univ Sch Comp Sci & Informat Syst Potchefstroom South Africa

ISBN: (纸本)9781450365253

A rapidly changing information technology industry and the economy are challenging educators to select and competently use the most appropriate learning resources. Many research studies report on the way we learn best, but most professional educators are generally uninformed concerning both the results of such studies and the value of heads-on and hands-on learning. Wasted resources, learner apathy, and discouragement are often experienced when suitable, interactive teaching methods are not appropriately applied. The challenge is to retain the student's attention, while communicating subject related information. In recent years, board games have been used to a limited extend in corporate settings, but most educators are not aware of the value and the effect of board games designed for learning. Interactive and engaging learning methods like board games provide immediate feedback through discussion with other players with emphasis on hands-on and heads-on activities. The aim of this study is to investigate board games as a method to improve students' knowledge about the Java programming language as seen from the lecturer's viewpoint. This study claims that board games can be used as inexpensive, interactive engagement learning methods to stimulate hands-on and heads-on activities. The results of this study are very important especially for developing countries that cannot afford expensive materials to make students mentally and physically active.

关键词： Java programming computer science board games

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A study of GUI based technologies in e-commerce applications 2

A study of GUI based technologies in e-commerce applications

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2nd international conference on Inventive Systems and Control (ICISC)

作者： Katarya, Rahul Anand, Shefali Delhi Technol Univ Informat Technol Dept Main Bawana Rd Delh India

ISBN: (纸本)9781538608074

In an IT and software industry, new and improved technologies are always on the rise. We have to keep ourselves updated with these innovations, in order to develop an effective product for commercial use. On the "world wide web", an application is interconnected with various services and plug-ins, making it necessary for the application to be compatible with maximum technologies. Working in Server Development department, we have a more crucial role to play to ensure an application's efficient working, as almost all of them, today, is online. We discuss here, various technologies used in different projects from cloud services to application programming.

关键词： Java Servers Databases Cloud computing Security Control systems

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The Application of a Mixed Coding Approach to Address Mixed Integer Linear and Non-Linear programming Problems using Particle Swarm Optimization (PSO) with an Artificial Bee Colony (ABC) Algorithm 18

The Application of a Mixed Coding Approach to Address Mixed ...

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2nd international conference on Intelligent Systems, Metaheuristics and Swarm Intelligence (ISMSI)

作者： Sukpancharoen, Somboon Srinophakun, Thongchai Rohitatisha Hirunlabh, Jongjit Kasetsart Univ Dept Chem Engn Fac Engn 50 Ngamwongwan Rd Bangkok 10900 Thailand Bangkokthonburi Univ Fac Technol & Innovat 16-10 Leabklongtaweewatana Rd Bangkok 10170 Thailand

ISBN: (纸本)9781450364126

This study used optimization via ABC-PSO mixed coding to solve problems involving mixed integer nonlinear programming (MINLP) and mixed integer linear programming (MIILP). The combination of ABC (Artificial Bee Colony) and PSO (Particle Swarm Optimization) is assessed with reference to seven benchmark problem tests. The A algorithm was then tested and analyzed. The proposed approach is shown to compare favorably with other established meta-heuristic techniques on the basis of the results provided in this study. This study also considers the specific attributes of the ABC-PSO algorithm with a focus on the potential consequences of application for actual constrained optimization.

关键词： Bee colony algorithm (ABC) Particle swarm optimization (PSO) Mixed integer non-linear programming (MINLP)

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Experimental verification of acoustic source localization technique in heterogeneous plates 14

Experimental verification of acoustic source localization te...

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14th international conference on Theoretical and Computational Acoustics, ICTCA 2019

作者： Yin, Shenxin Fu, Jia Kundu, Tribikram Cui, Zhiwen Department of Acoustics and Microwave Physics College of Physics Jilin University 2699Qianjin Street Changchun Jilin130012 China Department of Civil and Architectural Engineering and Mechanics University of Arizona 1209 E 2nd St TucsonAZ85719 United States

Acoustic source localization (ASL) in a structure by analyzing the recorded signals at the receivers is an important process in nondestructive testing for various applications. In spite of recent research advances on this topic some challenges still remain when the plate becomes heterogeneous. Heterogeneous structures are found in natural materials as well as in engineered synthetic materials. The wave propagation direction deviates from a straight line when it propagates through a heterogeneous structure due to refraction at the interface. This paper combines the law of refraction and TDOA technique to localize the acoustic source. No complicated nonlinear equation solution is required and thus it avoids the problem of multiplicity and wrong solution. The process of acoustic emission source localization is fast and easy for structural health monitoring. Positioning a set of sensor clusters in every one of different media media constituting the heterogeneous structure is required. It enables acoustic source localization in a heterogeneous plate of unknown material properties. The technique works well for homogeneous and multi-layered heterogeneous plate structures. The experiment results show that the new acoustic source localization technique of heterogeneous plate can localize the acoustic source accurately. © ICTCA2019 14 international conference on Theoretical and Computational Acoustics.

关键词： Time difference of arrival

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Uncertainty-based Human Motion Tracking with Stable Gaussian Process State Space Models

Uncertainty-based Human Motion Tracking with Stable Gaussian...

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2nd international-Federation-of-Automatic-Control (IFAC) conference on Cyber-Physical and Human-Systems (CPHS)

作者： Umlauft, Lukas Poehler Jonas Hirche, Sandra Tech Univ Munich Dept Elect & Comp Engn Chair Informat Oriented Control D-80333 Munich Germany

Data-driven approaches are well suited to represent human motion because arbitrary complex trajectories can be captured. Gaussian process state space models allow to encode human motion while quantifying uncertainty due to missing data. Such human motion models are relevant for many application domains such as learning by demonstration and motion prediction in human-robot collaboration. For goal-directed tasks it is essential to impose stability constraints on the model representing the human motion. Motivated by learning by demonstration applications, this paper proposes an uncertainty-based control Lyapunov function approach for goal-directed path tracking. We exploit the model fidelity which is related to the location of the training and test data: Our approach actively strives into regions with more demonstration data and thus higher model certainty. This achieves accurate reproduction of the human motion independent of the initial condition and we show that generated trajectories are uniformly globally asymptotically stable. The approach is validated in a nonlinear learning by demonstration task where human-demonstrated motions are reproduced by the learned dynamical system, and higher precision than competitive state of the art methods is achieved. (C) 2019, IFAC (international Federation of Automatic Control) Hosting by Elsevier Ltd. All rights reserved.

关键词： Path tracking Human centered automation Modeling of human performance nonlinear system identification Lyapunov methods Control under uncertainty

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Energy-conserving methods for the nonlinear Schrodinger equation

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APPLIED MATHEMATICS And COMPUTATION 2018年 318卷 3-18页

作者： Barletti, L. Brugnano, L. Frasca Caccia, Gianluca Iavernaro, F. Univ Firenze Dipartimento Matemat & Informat U Dini Florence Italy Univ Kent Sch Math Stat & Actuarial Sci Canterbury Kent England Univ Bari Dipartimento Matemat Bari Italy

In this paper, we further develop recent results in the numerical solution of Hamiltonian partial differential equations (PDEs) (Brugnano et al., 2015), by means of energy-conserving methods in the class of Line Integral Methods, in particular, the Runge-Kutta methods named Hamiltonian Boundary Value Methods (HBVMs). We shall use HBVMs for solving the nonlinear Schrodinger equation (NLSE), of interest in many applications. We show that the use of energy-conserving methods, able to conserve a discrete counterpart of the Hamiltonian functional, confers more robustness on the numerical solution of such a problem. (C) 2017 Elsevier Inc. All rights reserved.

关键词： Hamiltonian partial differential equations nonlinear Schrodinger equation Energy-conserving methods Line integral methods Hamiltonian Boundary Value methods HBVMs

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