2022 Ivannikov Ispras Open Conference (ISPRAS)最新文献_第2页

Analysis of wake around DARPA Suboff including self-propulsion with a seven-blade propeller in positive pitches 包括七叶螺旋桨自推进在内的DARPA Suboff的尾流分析

2022 Ivannikov Ispras Open Conference (ISPRAS) Pub Date : 2022-12-01 DOI: 10.1109/ISPRAS57371.2022.10076857

Xinyu Wang, Q. Zhang, Yingfan Qin, Tianyuan Wang, Zhicheng Wang, A. Epikhin

{"title":"Analysis of wake around DARPA Suboff including self-propulsion with a seven-blade propeller in positive pitches","authors":"Xinyu Wang, Q. Zhang, Yingfan Qin, Tianyuan Wang, Zhicheng Wang, A. Epikhin","doi":"10.1109/ISPRAS57371.2022.10076857","DOIUrl":"https://doi.org/10.1109/ISPRAS57371.2022.10076857","url":null,"abstract":"The Delayed Detached Eddy Simulation(DDES) of the DARPA Suboff, including self-propulsion with sail, fins and seven-blade propeller, is performed at high Reynolds number and pitch-angle inflow besed OpenFOAM, the mixing evolution and energy performance of the vortex structure have been focused. Computations of Suboff are validated against reference data, simulation and experiment of the propeller are carried out simultaneously under the condition of high blade load (J = 0). The time-averaged, phase-averaged, instantaneous vorticity fields and power spectral density (PSD) around the submarine including self-propulsion, are reported under oblique inflow with drift angles of 0°, 7° and 15°. Computations demonstrate that the oblique inflow will deflect and attenuate the horseshoe vortex behind the sail resulting in no longer interacting with fin. Besides, it will speed up the process of the vortex dissipation to a certain extent. With the increase of inflow angle, the hydrodynamic performance of the propeller will have an increasing trend, but the trend will decrease. The fin-sheet vortex accelerates the instability process of the leeward wake, moreover, the horizontal fin-sheet vortex and propeller wake will deflect leeward with the inflow-angle increasing, varying the area of interaction. It is worth noting that the tip-vortex induced by leeward fin is attracted to wake, resulting in the abnormal wake under 15° inflow, and drift opposite to the rotation direction of the propeller.","PeriodicalId":103880,"journal":{"name":"2022 Ivannikov Ispras Open Conference (ISPRAS)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115927259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

kernel_slicer: high-level approach on top of GPU programming API kernel_slicer:基于GPU编程API的高级方法

2022 Ivannikov Ispras Open Conference (ISPRAS) Pub Date : 2022-12-01 DOI: 10.1109/ISPRAS57371.2022.10076850

V. Frolov, V. Sanzharov, V. Galaktionov

{"title":"kernel_slicer: high-level approach on top of GPU programming API","authors":"V. Frolov, V. Sanzharov, V. Galaktionov","doi":"10.1109/ISPRAS57371.2022.10076850","DOIUrl":"https://doi.org/10.1109/ISPRAS57371.2022.10076850","url":null,"abstract":"We present a cross-platform approach to development of high performance software for both CPUs (via ISPC) and GPUs (via Vulkan) using a subset of common C++. An important difference of our technology with existing solutions is that we do not introduce any new language constructs or directives for parallel processing in to the language. Opposite to that we restrict language capabilities with a specific programming patterns and library calls thus making “clean code” also the high performance one. Unlike many other programming technologies, our solution doesn’t make projects using it dependent on it: (1) the input code is a normal C++ code which can be processed with any existing C++11 compiler and also can use any directive-based technologies inside (for example, OpenMP); (2) the output code is a readable implementation of the same algorithm in ISPC or Vulkan which is intended to be worked with by replacing different virtual functions and kernels if needed. As a result, this approach has an important advantage over existing ones: even if we have a limited hardware support in our translator, user is not limited by these features. This is because optimizations could be manually added to the generated code, and our approach assumes user will do this in such a way that code re-generation will not break them. Therefore, we position our system as help for developers who need deep performance control and understanding (via careful analysis of the low level code) which usually forces them to use Vulkan on a GPU or ISPC on a CPU. Our translator takes a C++ class as input and generates output implementation as a derived class using source-to-source transformation via clang front-end. Therefore the generated code is trivially integrated with existing codebase by just replacing class pointer with the generated implementation. Finally, unlike many other solutions, our technology is not a black box for a user and also makes debugging transparent because it is easy to distinguish translator errors from the user’s errors.","PeriodicalId":103880,"journal":{"name":"2022 Ivannikov Ispras Open Conference (ISPRAS)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116842629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bottom material entrainment in 3D simulations of flows on mountain slopes in open-source solver avalancheFoam 在开源求解器avalancheFoam中三维模拟山坡流动中的底部物质夹带

2022 Ivannikov Ispras Open Conference (ISPRAS) Pub Date : 2022-12-01 DOI: 10.1109/ISPRAS57371.2022.10076266

D. Romanova, M. Eglit

引用次数: 0

Interprocedural static analysis for Go with closure support 支持闭包的Go语言过程间静态分析

2022 Ivannikov Ispras Open Conference (ISPRAS) Pub Date : 2022-12-01 DOI: 10.1109/ISPRAS57371.2022.10076860

A. Borodin, Varvara Dvortsova, Alexander Volkov

引用次数: 0

A Method of Multilingual Summarization For Scientific Documents 一种多语种科技文献摘要方法

2022 Ivannikov Ispras Open Conference (ISPRAS) Pub Date : 2022-12-01 DOI: 10.1109/ISPRAS57371.2022.10076852

Kirill Grashchenkov, A. Grabovoy, Ildar Khabutdinov

引用次数: 0

Boundary integral equation solving in vortex method using the Barnes-Hut/multipole algorithm 用Barnes-Hut/多极算法求解涡旋法边界积分方程

2022 Ivannikov Ispras Open Conference (ISPRAS) Pub Date : 2022-12-01 DOI: 10.1109/ISPRAS57371.2022.10076862

E. Ryatina, I. Marchevsky, Alexandra Kolganova

引用次数: 2

Comparative analysis of non/ductedpropeller under the influence of vertical wall 竖壁影响下无导管螺旋桨的对比分析

2022 Ivannikov Ispras Open Conference (ISPRAS) Pub Date : 2022-12-01 DOI: 10.1109/ISPRAS57371.2022.10076863

Meng Wang, QingXu, Q. Zhang, A. Epikhin, B. Liang

{"title":"Comparative analysis of non/ductedpropeller under the influence of vertical wall","authors":"Meng Wang, QingXu, Q. Zhang, A. Epikhin, B. Liang","doi":"10.1109/ISPRAS57371.2022.10076863","DOIUrl":"https://doi.org/10.1109/ISPRAS57371.2022.10076863","url":null,"abstract":"A numerical and experimental study has been conducted to explore the influence of vertical wall on the wake of the non/ducted propeller. The numerical simulation is achieved using a structured and transient sliding mesh approach. The control equations are closed by the Delayed Detached Eddy Simulation (DDES), and the computational results are compared with the available experimental data. By dividing the ducted propeller flow wake vortex shape into different behavior regions, the temporal vortex evolution near the wake of the propellers under the influence of different vertical walls are emphatically analysed. The results show that the jet flow wake reaches the wall, forming a conical low-speed area at the centre of the wall. The fluid circulates from the outer side to the inner side of the cone, forming a vortex whose size first increases and then decreases with the distance between the propellers and the wall. In addition, the change of propellers wake velocity profile is given. The wake velocity of propeller and ducted propeller decreases exponentially and linearly along the flow direction, respectively.","PeriodicalId":103880,"journal":{"name":"2022 Ivannikov Ispras Open Conference (ISPRAS)","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123318899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Applicability of several free software tools for solving problems of compressible gas dynamics 几个解决可压缩气体动力学问题的自由软件工具的适用性

2022 Ivannikov Ispras Open Conference (ISPRAS) Pub Date : 2022-12-01 DOI: 10.1109/ISPRAS57371.2022.10076856

A. Makhnov, E. Kolesnik, A. Smirnovsky, Elena Babich, Daniil Osadchiy

引用次数: 0

Docmarking: Real-Time Screen-Cam Robust Document Image Watermarking 文档标记:实时屏幕摄像头鲁棒文档图像水印

2022 Ivannikov Ispras Open Conference (ISPRAS) Pub Date : 2022-12-01 DOI: 10.1109/ISPRAS57371.2022.10076265

A. Yakushev, Y. Markin, D. Obydenkov, A. Frolov, S. Fomin, Manuk Akopyan, A. Kozachok, Arthur Gaynov

引用次数: 0

Detecting anomalous device loads during exploratory testing of mobile applications 在移动应用程序的探索性测试期间检测异常设备负载

2022 Ivannikov Ispras Open Conference (ISPRAS) Pub Date : 2022-12-01 DOI: 10.1109/ISPRAS57371.2022.10076851

D. Mikhaltsov, K. Sorokin

{"title":"Detecting anomalous device loads during exploratory testing of mobile applications","authors":"D. Mikhaltsov, K. Sorokin","doi":"10.1109/ISPRAS57371.2022.10076851","DOIUrl":"https://doi.org/10.1109/ISPRAS57371.2022.10076851","url":null,"abstract":"Reputation and competitiveness of both mobile applications and mobile operating systems depend on their quality. Developers are using various techniques to ensure high quality. Recently, exploratory testing approaches have been gaining significant attention in this context. However, these approaches mostly do not consider one major non-functional requirement that affects quality – performance issues. Performance issues, such as sluggish UI or extensive battery consumption, are tightly connected to inefficient use of device resources. Detecting these issues is a non-trivial task. In this paper we present a novel approach to detect anomalous device resource usage and hence potential performance issues. Our approach is integrated with exploratory testing framework and uses information about previously executed test runs to build the expected resource usage model. The underlying model represents resource usage data as a multidimensional time series and is able to detect anomalous time intervals. We integrate our approach with exploratory testing tool for Android and empirically evaluate it on a set of real-world applications with injected performance issues. Our results show that suggested approach can be successfully applied to detect anomalous device resource usage and potential performance regressions.","PeriodicalId":103880,"journal":{"name":"2022 Ivannikov Ispras Open Conference (ISPRAS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122902132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0