Computer Sciences Commons^™

Sortedeffects: Sorted Causal Effects In R, Schuowen Chen, Victor Chernozhukov, Iván Fernández-Val, Ye Luo

The R Journal

Chernozhukov et al. (2018) proposed the sorted effect method for nonlinear regression models. This method consists of reporting percentiles of the partial effects, the sorted effects, in addition to the average effect commonly used to summarize the heterogeneity in the partial effects. They also propose to use the sorted effects to carry out classification analysis where the observational units are classified as most and least affected if their partial effect are above or below some tail sorted effects. The R package SortedEffects implements the estimation and inference methods therein and provides tools to visualize the results. This vignette serves as …

Krahasimi I Css Frameworkave Bootstrap 4 Dhe Tailwind Css Duke Zhvilluar Një “Admin Panel”, Albert Qerimi

Theses and Dissertations

Qëllimi kryesor i këtij punimi është krahasimi i frameworkave CSS Bootstrap dhe Tailwind CSS për më tepër të dy frameworkat janë krahasuar në mënyrë që të mund të zgjedhni atë që është më produktive dhe efikase për nevojat e projektit tuaj, parametra si përformanca, lehtësia e të kuptuarit, mbështetja, përmbajta, konfigurimi dhe teori karakteristike janë marrë për bazë dhe si rezultat është zhvilluar një projekt i njëjte me të dy këto frameworka.

Edhe aplikacionet me moderne të ueb-it përdorin front end frameworka për krijimin e përmbajtjes të struktures në mënyrë me të shpejte dhe efikase që kursen shumë kohe sidomos …

Përfitimet Praktike Të Përdorimit Të Aop Si Paradigme E Programimit Në Zhvillimin E Softuerit, Esmoza Elshani

Theses and Dissertations

Sfida kryesore në projektimin e softuerit është të merremi me ndarjen e shqetësimeve teknike dhe se si ti menaxhojmë këto shqetësime. Ndarja e shqetësimeve është çelësi për të mbajtur kontrollin e përgjithshëm përballë problemeve komplekse dhe zgjidhjeve te një projekti.

Me kalimin e viteve, kërkimi për ndarje më të mirë të shqetësimeve na ka dërguar në teknologji të ndryshme, ndër të cilat janë teknikat e modulimit siç është programimi i strukturuar, llojet abstrakte të dhënave dhe orientimi në objekte. Një teknike e re e programimit të orientuar në aspekti (AOP) është teknika më e shquar për ndarjen e shqetësimeve.

Përmes …

Deployment Trends Of The Internet Of Things, Laura Berisha

Theses and Dissertations

The Internet of Things (IoT) is the internetworking of physical devices, vehicles and other objects which consists of an embedded system with sensors, actuators and network connectivity that enable to collect and exchange data. The IoT allows objects to be sensed or controlled remotely across existing network infrastructure, creating opportunities for more integration of the physical world into computer-based systems, and result in improved accuracy, efficiency and economic benefit. The IoT is a rapidly increasing and promising technology which becomes more and more present in our everyday lives.

We can say that Internet of Things (IoT) is a new revolution …

Erp Dhe Bashkëpunimi Me Organizata, Trendet E Zhvillimit Dhe E Ardhmja E Tyre, Arta Jusaj

Theses and Dissertations

Rritje demografike dhe standardi jetësorë në nivelin global në njëren anë, si dhe kërkesa për shërbime të shpejta, të sakta, të menaxhuara dhe të kontrolluara në kohë, në anën tjetër, ishin një nga elemetet kryesor për të shtyrë para zhvillimin shkencor për të krijuar sisteme softuerike me qëllim që njeriu të përball me lehtësi kërkesat e tijë ditore. Sistemi ERP paraqet një sistem softuerik për planifikimin dhe menaxhimin e bizneseve, duke përfshirë zonën funksionale të tijë siç janë: planifikimi, prodhimi, shitja, marketingu, shpërndarja, kontabiliteti, menaxhimi finaciar, menaxhimi i burimeve njerzore, transporti, servisimi etj. Ky punim ka për qëllim të trajtoj …

Sistemet Për Përcjelljen E Huave Në Institucionet Mikrofinanciare, Arianit Gashi

Theses and Dissertations

Sistemet për përcjelljen e huave janë sistem kryesor në institucionet mikrofinanciare, pasiqë produkti kryesor e në shumë raste edhe i vetmi produkt në institucione mikrofinanciare është huaja/ kredia. Tema së pari trajton karakteristikat e përgjithshme të këtyre sistemeve, pastaj hyn në vecoritë dhe sfidat e këtyre sistemeve, si janë raportet dhe kërkesat për informacione nga këto sisteme, dhe pastaj më gjerësisht trajtohet zhvillimi dhe implementimi i këtyre sistemeve. Gjatë këtij studimi janë hulumtuar të metat e sistemeve për përcjellje të huave dhe konkludohet që e metë kryesore është integrimi me sistemin e pagesave. Andaj, kjo teme trajton sistemet për përcjelljen …

Javascript Frameworks, Arbias Krasniqi

Theses and Dissertations

JavaScript është një gjuhë object-oriented që përdoret për të bërë faqe interaktive (p.sh. duke pasur animacione komplekse, butona të klikueshme, menutë popup etj.). Ekzistojnë gjithashtu versione më të avancuara të versionit të serverit të JavaScript, si Node.Js, të cilat ju lejojnë të shtoni më shumë funksionalitete në një faqe interneti (si bashkëpunimi në kohë reale midis kompjuterëve të shumtë). JavaScript mund të lidhet me objektet e mjedisit të tij për të siguruar kontrollin programatik mbi ta. JavaScript përmban një bibliotekë standarde të objekteve, të tilla si Array, Date dhe Math, dhe një sërë elementësh të gjuhës siç janë operatorët, strukturat …

Search Engine Optimization Implementation Process, Besartë Parduzi

Theses and Dissertations

Zhvillimi i teknologjisë në vitet e fundit ka arritur pothuajse në kulminacion dhe ka prekur gati cdo fushë të jetës tonë gjithashtu edhe bizneset dhe organizatat e ndryshme. Gati të gjitha bizneset dhe organizatat shfaqin veprimtarinë dhe hapat e zhvillimit të tyre nëpërmjet platformave të ndryshme online siç janë rrjetet sociale e web-faqet personale. Bota e digjitalizimit është duke u zhvilluar në të gjitha aspektet duke ndikuar që gjithashtu edhe marketingu të mar kahje digjitale dhe duke nisur një trend të ri të aplikimit të tij nga bizneset dhe organizatat.Ky trend cdo ditë e më shumë do të bëhet e …

Ndikimi I Cloud Computing Në Ndërmarrje Të Vogla Dhe Të Mesme Nga Aspekti Financiar Dhe I Sigurisë Në Kosovë, Burim Qerimi

Theses and Dissertations

Inovacionet apo shpikjet e reja janë të nevojshme për të ecur tutje në valën e pashmangshme të ndryshimeve gjatë evoluimit jetësor. Shumica e ndërmarrjeve vazhdimisht mundohen të zvogëlojnë shpenzimet e tyre ku një prej mënyrave është zvogëlimi i shpenzimeve në shërbimet informative. Kërkesa e zvogëlimit të shpenzimeve në ndërmarrje në anën e shërbimeve informative ka krijuar nevojën e krijimit të platformës së re Cloud Computing. Platforma e re Cloud computing ofron shërbime më të mira kompjuterike duke përmirësuar cilësinë dhe reduktimin e administratës dhe infrastrukturës brenda një ndërmarrje. Platforma Cloud Computing bazohet në atë duke përmbledhur shumë aplikacione në shërbim …

Using Stream Processing For Albanian Twitters Data Analysis, Veton Dabiqaj

Theses and Dissertations

Sferat e Stream Reasoning dhe Stream Processing, janë sfera të reja dhe ka shumë pak sisteme që përkrahin rezonimin mbi të dhënat rrëke (stream data) si dhe procesimin e tyre. Po ashtu, aktualisht mungon një platformë që mundëson procesimin e cicërimave të Twitter-it në gjuhën shqipe. Duke u bazuar se mungon një sistem i tillë, në këtë temë trajtohet krijimi i një platforme e cila mundëson resonimin dhe procesimin e cicërimave në gjuhën shqipe. Për përpunimin e cicërimave përdoret C-SPARQL. C-SPARQL është një gjuhë e re për pyetësorët e vazhdueshëm mbi rrjedhën e informatave në kohë reale (streams) të formatit …

Simulation Analysis On Ballistic Deflection Of Projectile Obliquely Penetrating Into Concrete, Jianfeng Xue, Peihui Shen, Xiaoming Wang

Journal of System Simulation

Abstract: In order to study the trajectory deflection law of projectiles obliquely penetrating into concrete targets, based on the theory of rigid body kinematics and cavity expansion, the penetration motion differential equations of ogive-nosed projectile were established. The variation rules of trajectory offset and invasion depth were given in different initial conditions through the programming calculation and numerical simulation by MATALB and ANSYS-LYNA software. The calculation results agree well with experimental data. The results show that the influence of penetration depth and deflection angle increase with the oblique angle increasing. The influence of ballistic deflection decreases with the …

Towards Security And Privacy In Networked Medical Devices And Electronic Healthcare Systems, Isabel Jellen

Master's Theses

E-health is a growing eld which utilizes wireless sensor networks to enable access to effective and efficient healthcare services and provide patient monitoring to enable early detection and treatment of health conditions. Due to the proliferation of e-health systems, security and privacy have become critical issues in preventing data falsification, unauthorized access to the system, or eavesdropping on sensitive health data. Furthermore, due to the intrinsic limitations of many wireless medical devices, including low power and limited computational resources, security and device performance can be difficult to balance. Therefore, many current networked medical devices operate without basic security services such …

Writing For Each Other: Dynamic Quest Generation Using In Session Player Behaviors In Mmorpg, Sean Christopher Mendonca

Master's Theses

Role-playing games (RPGs) rely on interesting and varied experiences to maintain player attention. These experiences are often provided through quests, which give players tasks that are used to advance stories or events unfolding in the game. Traditional quests in video games require very specific conditions to be met, and for participating members to advance them by carrying out pre-defined actions. These types of quests are generated with perfect knowledge of the game world and are able to force desired behaviors out of the relevant non-player characters (NPCs). This becomes a major issue in massive multiplayer online (MMO) when other players …

Attacking Computer Vision Models Using Occlusion Analysis To Create Physically Robust Adversarial Images, Jacobsen Loh

Master's Theses

Self-driving cars rely on their sense of sight to function effectively in chaotic and uncontrolled environments. Thanks to recent developments in computer vision, specifically convolutional neural networks, autonomous vehicles have developed the ability to see at or above human-level capabilities, which in turn has allowed for rapid advances in self-driving cars. Unfortunately, much like humans being confused by simple optical illusions, convolutional neural networks are susceptible to simple adversarial inputs. As there is no overlap between the optical illusions that fool humans and the adversarial examples that threaten convolutional neural networks, little is understood as to why these adversarial examples …

Mnemonics Training: Multi-Class Incremental Learning Without Forgetting, Yaoyao Liu, Yuting Su, An-An Liu, Bernt Schiele, Qianru Sun

Research Collection School Of Computing and Information Systems

Multi-Class Incremental Learning (MCIL) aims to learn new concepts by incrementally updating a model trained on previous concepts. However, there is an inherent trade-off to effectively learning new concepts without catastrophic forgetting of previous ones. To alleviate this issue, it has been proposed to keep around a few examples of the previous concepts but the effectiveness of this approach heavily depends on the representativeness of these examples. This paper proposes a novel and automatic framework we call mnemonics, where we parameterize exemplars and make them optimizable in an end-to-end manner. We train the framework through bilevel optimizations, i.e., model-level and …

Towards Distributed Node Similarity Search On Graphs, Tianming Zhang, Yunjun Gao, Baihua Zheng, Lu Chen, Shiting Wen, Wei Guo

Research Collection School Of Computing and Information Systems

Node similarity search on graphs has wide applications in recommendation, link prediction, to name just a few. However, existing studies are insufficient due to two reasons: (i) the scale of the real-world graph is growing rapidly, and (ii) vertices are always associated with complex attributes. In this paper, we propose an efficiently distributed framework to support node similarity search on massive graphs, which considers both graph structure correlation and node attribute similarity in metric spaces. The framework consists of preprocessing stage and query stage. In the preprocessing stage, a parallel KD-tree construction (KDC) algorithm is developed to form a newly …

An Extended Framework Of Privacy-Preserving Computation With Flexible Access Control, Wenxiu Ding, Rui Hu, Zheng Yan, Xinren Qian, Robert H. Deng, Laurence T. Yang, Mianxiong Dong

Research Collection School Of Computing and Information Systems

Cloud computing offers various services based on outsourced data by utilizing its huge volume of resources and great computation capability. However, it also makes users lose full control over their data. To avoid the leakage of user data privacy, encrypted data are preferred to be uploaded and stored in the cloud, which unfortunately complicates data analysis and access control. In particular, few existing works consider the fine-grained access control over the computational results from ciphertexts. Though our previous work proposed a framework to support several basic computations (such as addition, multiplication and comparison) with flexible access control, privacy-preserving division calculations …

Editing-Enabled Signatures: A New Tool For Editing Authenticated Data, Binanda Sengupta, Yingjiu Li, Yangguang Tian, Robert H. Deng

Research Collection School Of Computing and Information Systems

Data authentication primarily serves as a tool to achieve data integrity and source authentication. However, traditional data authentication does not fit well where an intermediate entity (editor) is required to modify the authenticated data provided by the source/data owner before sending the data to other recipients. To ask the data owner for authenticating each modified data can lead to higher communication overhead. In this article, we introduce the notion of editing-enabled signatures where the data owner can choose any set of modification operations applicable on the data and still can restrict any possibly untrusted editor to authenticate the data modified …

Knowledge Enhanced Neural Fashion Trend Forecasting, Yunshan Ma, Yujuan Ding, Xun Yang, Lizi Liao, Wai Keung Wong, Tat-Seng Chua

Research Collection School Of Computing and Information Systems

Fashion trend forecasting is a crucial task for both academia andindustry. Although some efforts have been devoted to tackling this challenging task, they only studied limited fashion elements with highly seasonal or simple patterns, which could hardly reveal thereal fashion trends. Towards insightful fashion trend forecasting,this work focuses on investigating fine-grained fashion element trends for specific user groups. We first contribute a large-scale fashion trend dataset (FIT) collected from Instagram with extracted time series fashion element records and user information. Furthermore, to effectively model the time series data of fashion elements with rather complex patterns, we propose a Knowledge Enhanced …

Multi-Rate Simulation Based On Explicit-Implicit Hybrid Integration, Bingda Zhang, Chen Ming, Wang Xiao, Lanyu Wang

Journal of System Simulation

Abstract: A multi-rate simulation method based on explicit-implicit hybrid integration algorithm for the grid-connected photovoltaic system which included power electronic devices with a variety of switching frequency was put forward. Inductances and capacitances were used to divide the grid-connected photovoltaic system into subsystems. A multi-rate interface was put forward to satisfy the request of real time. The stability criterion of the multi-rate simulation algorithm was put forward. FPGA was used as a platform to build the digital grid-connected photovoltaic system. The hardware in loop test for DC/DC and DC/AC converter controllers was conducted on this platform to verify the accuracy …

Reachable Set Modeling Approach For Autonomous Vehicle's Dynamic Conflict Control, Cao Kai, Xiufang Liu, Yang Xu, Shen Peng

Journal of System Simulation

Abstract: Aiming at the problem of active safety control modeling for autonomous vehicles, a combined method using the formal modeling and the dynamic non-cooperative game theory was proposed for discussing a control strategy of trajectory tracking and collision avoidance under dynamic conflict condition between autonomous vehicles. And it was proposed to divide the system control into three modes: trajectory tracking, collision avoidance and switching between trajectory tracking and collision avoidance. Taking into account the complexity as a hybrid systems and the existence of the trajectory tracking error for autonomous vehicle, a modeling approach based on reachable set was proposed for …

Weighted Online Estimation Of Soc Based On Adaptive Battery Model, Haohao Sun, Tinglong Pan, Dinghui Wu

Journal of System Simulation

Abstract: Aiming at the problem that the traditional lithium battery model has poor adaptive ability in SOC estimation and the local estimation accuracy of the single SOC estimation algorithm is low, online identification of model parameters with Multi-Innovation Stochastic Gradient algorithm and method of weighted online estimation of SOC was proposed. The results of lithium-ion battery model parameters online identification updated in real time, realizing lithium-ion battery model adaptive. Aiming at the estimation of SOC, a method of weighted online estimation method based on the PI (proportion and integral) regulator's OCV combined with Ah (an integral method) was proposed. Weights …

Multi-Variable Modeling Research For Main-Steam Temperature Of Power Station Boiler Based On Improved Differential Evolution Algorithm, Li Qin, Zhang Hao, Daogang Peng, Yibo Guo, Nianlong Wang, Yuzhen Sun

Journal of System Simulation

Abstract: By analyzing the factors which affected the main-steam temperature, a multi-variable model was introduced to overcome the bad result of single variable cascade control. An improved differential evolution algorithm was proposed including mutation strategies random selection, crossover ratio and mutation ratio adaptive adjustment, which was used for closed-loop identification of main-steam multi-variable transfer function model. The principle and method how to obtain valid identification data from power plant distributed control system history database was introduced, and the data from some 1 000 MW coal-fired power plant was used to identify and verify the main-steam temperature multi-variable model, …

Study On Visual Function Of Human Computer Interaction In Parachuting Simulator, Han Liang, Gong Xuan, Jiangyun Wang, Yanghua Du

Journal of System Simulation

Abstract: The parachuting training system consists of software and hardware, to simulate the parachute training through head mounted display and operating equipment, combined with system modeling, kinematic computation, visual display and expert evaluation. Principle methods of head mounted display with human-computer interactive function and exploitation of Vega Prime inventive exploration on the information collection of viewpoint are conducted. It provides a real time training environment through the configuration of environmental effects, scene control, collision detection and driving information.

Stability Of Electrically Conducting Fluid Flow In Channel Under Magnetic Field, Dong Shuai, Lishuai Liu, Xuemin Ye

Journal of System Simulation

Abstract: The stability of conducting fluid flow in a channel under a vertical magnetic field was simulated by non-normal modal stability analysis. The perfect conductivity assumption of the channel wall was employed in the model, and its effect on the stability problem was considered. The results show that when the Hartmann number Ha is larger than 9, the two opposite Hartmann boundary layers are essentially independent of each other; however, when the Hartmann number Ha is smaller than 9, there are still residual interactions between the two opposite Hartmann boundary layers, which has influences on the stability of the flow. …

Research On Wavelength Routing Algorithm Based On Multi-Service In Satellite Optical Networks, Qingli Liu, Junfei Yao, Zhiguo Liu

Journal of System Simulation

Abstract: An optical wavelength routing algorithm for satellite networks based on multi-service was proposed, in order to solve the problem of low utilization rate of wavelengths, slow convergence and low efficiency of satellite optical networks. In this algorithm, it divided the area of the satellite network and updated the link in the area to improve the convergence speed of algorithm. Different services were assigned different wavelength sets to satisfy requirement of different service. According to the initial link weight, which included wavelength remain number and transmission delay, it changed link weight dynamically to achieve network load balancing and rational use …

Performance Analysis On Multiuser Untrusted Amplify-And-Forward Relay Networks, Deng Dan, Zhou Wen

Journal of System Simulation

Abstract: The effect of the untrusted relaying node was investigated on the secrecy outage probability (SOP) of amplify-and-forward (AF) relay networks in the presence of direct links and multiple users. In the considered system, the best user was selected according a certain criterion. It transmitted signals to the destination node with the aid of the untrusted relaying node. To reduce the useful information leakage, three selection criteria were proposed based on the channel state information of the direct and/or relaying link. The closed-form analytical SOP and the corresponding asymptotic expressions were derived. Computer simulation was conducted to validate the theoretical …

Forecasting Of Short-Term Power Load Of Secrpso-Svm Based On Data-Driven, Hairong Sun, Bixia Xie, Tian Yao, Zhuoqun Li

Journal of System Simulation

Abstract: For the parameter selection of support vector machine in modeling, a particle swarm optimization algorithm based on second-order oscillation and repulsion factor was proposed to optimize the parameter of SVM. The algorithm employed the nonlinear decreasing weight to balance the global and local search ability. Second-order oscillation factor could maintain the population diversity. The repulsion factor was introduced to make the swarm even distribution in search space, which could avoid local optimum. For the complex characteristics of nonlinearity, time-varying and multifactorial of electric power load, a support vector machine forecasting model based on data was proposed, and the influence …

Modeling And Simulation Of Mooring Force Prediction Based On Improved Ga-Bp Network, Shifeng Li, Zhanzhi Qiu

Journal of System Simulation

Abstract: According to the mooring security and early warning control requirement of the large open sea terminal, a ship mooring force prediction model based on genetic algorithm and BP network was studied. Environmental dynamic factors were considered and a model structure was determined by a weight statistics method; the learning method was improved by individual parent information and contemporary individual local gradient information; according to the improved model, a ship mooring force prediction method of the open sea terminal was proposed. The simulation results show that the performance of the prediction model has improved in the iteration number, …

Intensity Analysis And Fatigue Life Simulation For Connecting Bolt Of Shearer Machine Body, Zhiyong Hao, Yaolong Lei, Mao Jun, Yuan Zhi

Journal of System Simulation

Abstract: To obtain the cutting load spectrum of themachine body connecting bolt, the method of merging unknown quantities and multi calculation combined with the test experiments of shear mechanical properties was used to solve the overdetermined equations of shearer left haulage unit spatial mechanical model The cutting load spectrum of the machine body connecting bolt was taken to run PSD analysis, and the rainflow counting method was used to script the load spectrum. The frequency domain characteristics and time domain continuation characteristics were therefore obtained. The static analysis and fatigue life simulation analysis combined with the bolt load …