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GPU-based multi-slice per pass algorithm in interactive volume illumination rendering Research Articles

Dening Luo, Yi Lin, Jianwei Zhang,onexinoneyi@hotmail.com,Yilin@scu.edu.cn,zhangjianwei@scu.edu.cn

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 8,   Pages 1092-1103 doi: 10.1631/FITEE.2000214

Abstract: plays a significant role in medical imaging and engineering applications. To obtain an improved three-dimensional shape perception of , realistic has been considerably studied in recent years. However, the calculation overhead associated with interactive is unusually high, and the solvability of the problem is adversely affected when the data size and algorithm complexity are increased. In this study, a scalable and GPU-based (MSPP) algorithm is proposed which can quickly generate global volume shadow and achieve a translucent effect based on the transfer function, so as to improve perception of the shape and depth of . In our real-world data tests, MSPP significantly outperforms some complex volume shadow algorithms without losing the illumination effects, for example, half-angle slicing. Furthermore, the MSPP can be easily integrated into the parallel rendering frameworks based on sort-first or sort-last algorithms to accelerate . In addition, its scalable slice-based framework can be combined with several traditional frameworks.

Keywords: 体绘制;体积光照;体数据;单绘制遍多切片    

The Mechanics of 3D Multi-body Contact System of Long Shell and Tyres

Liang Xiaoling,Xiao Yougang,Li Xuejun

Strategic Study of CAE 2005, Volume 7, Issue 12,   Pages 41-44

Abstract:

According to the high iterative feature of shell and tyre structure, the multi-level substructure technique is adopted to set up the multi-body contact model between tyres and long shell. Applying parametric quadratic programming method, the multi-body contact FEM analysis of the No.2 rotary kiln in Henan Branch of China Aluminum Company is done, and the conclusions are as follows: The equivalent stress of shell at supports changes 5 times, and at other parts changes 4 times; the strength of shell at supports is weak, and at other parts is affluent; the strength of shell at the supports 2 and 3 is the weakest.

Keywords: shell     multi-body contact     multi-level substructure     mechanical property    

The Application of Multi-agent Based Distributed Intelligent Control in VAV Air Conditioning System

Zhang Hongwei,Wu Aiguo,Sheng Tao

Strategic Study of CAE 2006, Volume 8, Issue 7,   Pages 58-62

Abstract:

A VAV system can be treated as a multi-agent system. In this paper, a multi-agent-based distributed intelligent control method is presented to solve the problem of concordance and decoupling in the VAV system. A simulation program of VAV system is set up for control analysis. Through a simulation, this control method has been proved to be satisfactory.

Keywords: VAV     agent     multi-agent system     distributed intelligent control    

Coach-assisted multi-agent reinforcement learning framework for unexpected crashed agents Research Article

Jian ZHAO, Youpeng ZHAO, Weixun WANG, Mingyu YANG, Xunhan HU, Wengang ZHOU, Jianye HAO, Houqiang LI

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 7,   Pages 1032-1042 doi: 10.1631/FITEE.2100594

Abstract: Multi-agent is difficult to apply in practice, partially because of the gap between simulated and real-world scenarios. One reason for the gap is that simulated systems always assume that agents can work normally all the time, while in practice, one or more agents may unexpectedly "crash" during the coordination process due to inevitable hardware or software failures. Such crashes destroy the cooperation among agents and lead to performance degradation. In this work, we present a formal conceptualization of a cooperative multi-agent system with unexpected crashes. To enhance the robustness of the system to crashes, we propose a coach-assisted multi-agent framework that introduces a virtual coach agent to adjust the crash rate during training. We have designed three coaching strategies (fixed crash rate, curriculum learning, and adaptive crash rate) and a re-sampling strategy for our coach agent. To our knowledge, this work is the first to study unexpected crashes in a . Extensive experiments on grid-world and StarCraft II micromanagement tasks demonstrate the efficacy of the adaptive strategy compared with the fixed crash rate strategy and curriculum learning strategy. The ablation study further illustrates the effectiveness of our re-sampling strategy.

Keywords: Multi-agent system     Reinforcement learning     Unexpected crashed agents    

Multi-agent differential game based cooperative synchronization control using a data-driven method Research Article

Yu SHI, Yongzhao HUA, Jianglong YU, Xiwang DONG, Zhang REN

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 7,   Pages 1043-1056 doi: 10.1631/FITEE.2200001

Abstract: This paper studies the multi-agent based problem and its application to cooperative . A systematized formulation and analysis method for the multi-agent is proposed and a methodology based on the (RL) technique is given. First, it is pointed out that typical distributed controllers may not necessarily lead to global Nash equilibrium of the in general cases because of the coupling of networked interactions. Second, to this end, an alternative local Nash solution is derived by defining the best response concept, while the problem is decomposed into local s. An off-policy RL algorithm using neighboring interactive data is constructed to update the controller without requiring a system model, while the stability and robustness properties are proved. Third, to further tackle the dilemma, another configuration is investigated based on modified coupling index functions. The distributed solution can achieve global Nash equilibrium in contrast to the previous case while guaranteeing the stability. An equivalent parallel RL method is constructed corresponding to this Nash solution. Finally, the effectiveness of the learning process and the stability of are illustrated in simulation results.

Keywords: Multi-agent system     Differential game     Synchronization control     Data-driven     Reinforcement learning    

Predicting gas reservoir of Puguang Gas Field by applying seismic data structure characteristics abnormality method

Zeng Daqian,Lin Changrong,Zhang Shimin,Peng Xinling

Strategic Study of CAE 2010, Volume 12, Issue 10,   Pages 91-96

Abstract:

The reserve space of carbonate reservoir is complex and various in Puguang Gas Field, so the traditional hydrocarbon prediction methods can not get better results. The paper used the structural characteristics of seismic data volume to predict hydrocarbon reservoir, which took relationship between seismic data components on each seismic trace (that is structural characteristics of data volume) as study object to research the characteristics of composition and range of various parameters and their relationship with hydrocarbon bearing ability by detecting the amplitude value of each seismic trace, achieving the goal of predicting the hydrocarbon reservoir. Finally, the method was used to predict reservoir of Puguang Gas Field. The applied results demonstrated that the method can overcome the influence of reservoir nature and can get better results in the prediction of strong nonhomogeneous carbonate reservoir.

Keywords: seismic data volume     structural characteristics     Puguang Gas Field     hydrocarbon reservoir    

Existence and practice of gaming: thoughts on the development of multi-agent system gaming Perspective

Qi DONG, Zhenyu WU, Jun LU, Fengsong SUN, Jinyu WANG, Yanyu YANG, Xiaozhou SHANG

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 7,   Pages 995-1001 doi: 10.1631/FITEE.2100593

Abstract: Game is a universal being in the universe. Starting with human understanding of the game process, we discuss the existence and practice of gaming, expound challenges in multi-agent gaming, and put forward a theoretical framework for a multiagent evolutionary game based on the idea of evolution and system theory. Taking the next-generation early warning and detection system as an example, we introduce the applications of multi-agent evolutionary game. We construct a multi-agent selforganizing game decision-making model and develop a multi-agent method based on reinforcement learning, which are significant in studying organized and systematic game behaviors in a high-dimensional complex environment.

Keywords: 博弈;多智能体系统;多智能体演化博弈;预警探测    

A virtual 3D interactive painting method for Chinese calligraphy and painting based on real-time force feedback technology Article

Chao GUO, Zeng-xuan HOU, You-zhi SHI, Jun XU, Dan-dan YU

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 11,   Pages 1843-1853 doi: 10.1631/FITEE.1601283

Abstract: A novel 3D interactive painting method for Chinese calligraphy and painting based on force feedback technology is proposed. The relationship between the force exerted on the brush and the resulting brush deformation is analyzed and a spring-mass model is used to build a model of the 3D Chinese brush. The 2D brush footprint between the brush and the plane of the paper or object is calculated according to the deformation of the 3D brush when force is exerted on the 3D brush. Then the 3D brush footprint is obtained by projecting the 2D brush footprint onto the surface of the 3D object in real time, and a complete 3D brushstroke is obtained by superimposing 3D brush footprints along the painting direction. The proposed method has been suc-cessfully applied in a virtual 3D interactive drawing system based on force feedback technology. In this system, users can paint 3D brushstrokes in real time with a Phantom Desktop haptic device, which can effectively serve as a virtual reality interface to the simulated painting environment for users.

Keywords: 3D brush model     3D brushstroke     3D interactive painting     Real-time force feedback technology    

Decentralized multi-agent reinforcement learning with networked agents: recent advances Review Article

Kaiqing Zhang, Zhuoran Yang, Tamer Başar,kzhang66@illinois.edu,zy6@princeton.edu,basar1@illinois.edu

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 6,   Pages 802-814 doi: 10.1631/FITEE.1900661

Abstract: Multi-agent (MARL) has long been a significant research topic in both machine learning and control systems. Recent development of (single-agent) deep has created a resurgence of interest in developing new MARL algorithms, especially those founded on theoretical analysis. In this paper, we review recent advances on a sub-area of this topic: decentralized MARL with networked agents. In this scenario, multiple agents perform sequential decision-making in a common environment, and without the coordination of any central controller, while being allowed to exchange information with their neighbors over a communication network. Such a setting finds broad applications in the control and operation of robots, unmanned vehicles, mobile sensor networks, and the smart grid. This review covers several of our research endeavors in this direction, as well as progress made by other researchers along the line. We hope that this review promotes additional research efforts in this exciting yet challenging area.

Keywords: 强化学习;多智能体系统;网络系统;一致性优化;分布式优化;博弈论    

The Formation of Tetraploid Hybrids of Common Carp with Red Crucian Carp and the Evolutionary Significance of Tetraploidization in Vertebrate

Liu Shaojun,Cao Yunzhang,He Xiaoxiao,Li Jianzhong,Liu Yun

Strategic Study of CAE 2001, Volume 3, Issue 12,   Pages 33-41

Abstract:

In this paper, the number and karyotype of chromosomes, DNA content, the mean nuclear erythrocyte volume, gonads and gametes, embryo development, the mechanism of the tetraploid formation, and the appearance in tetraploid hybrid stocks of the red crucian carp (♀)× common carp (♂)were described. The tetraploid hybrids with stable genetic characteristics were inherited from F3 to F11 and a large population of tetraploid fish had been formed. The tetraploid hybrids were essentially different from their parents-red crucian carp and common carp in chromosome number, reproduction and appearance. Based on the genetic characteristics, the bisexual fertility and reproductive isolation, the tetraploid stocks had possessed the good base to form a new tetraploid species in the future. The formation of the new tetraploid stocks had great significance both in the evolutionary theory of vertebrate and in the production application.

Keywords: allotetraploid     triploid     diploid gamete     evolution    

Driftor: mitigating cloud-based side-channel attacks by switching and migrating multi-executor virtual machines Regular Papers

Chao YANG, Yun-fei GUO, Hong-chao HU, Ya-wen WANG, Qing TONG, Ling-shu LI

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 5,   Pages 731-748 doi: 10.1631/FITEE.1800526

Abstract:

Co-residency of different tenants’ virtual machines (VMs) in cloud provides a good chance for side-channel attacks, which results in information leakage. However, most of current defense suffers from the generality or compatibility problem, thus failing in immediate real-world deployment. VM migration, an inherit mechanism of cloud systems, envisions a promising countermeasure, which limits co-residency by moving VMs between servers. Therefore, we first set up a unified practical adversary model, where the attacker focuses on effective side channels. Then we propose Driftor, a new cloud system that contains VMs of a multi-executor structure where only one executor is active to provide service through a proxy, thus reducing possible information leakage. Active state is periodically switched between executors to simulate defensive effect of VM migration. To enhance the defense, real VM migration is enabled at the same time. Instead of solving the migration satisfiability problem with intractable CIRCUIT-SAT, a greedy-like heuristic algorithm is proposed to search for a viable solution by gradually expanding an initial has-to-migrate set of VMs. Experimental results show that Driftor can not only defend against practical fast side-channel attack, but also bring about reasonable impacts on real-world cloud applications.

Keywords: Cloud computing     Side-channel attack     Information leakage     Multi-executor structure     Virtual machine switch     Virtual machine migration    

Magmatic Ore Deposits in Small Rockbody in China

Tang Zhongli

Strategic Study of CAE 2002, Volume 4, Issue 6,   Pages 9-12

Abstract:

There is not any large deposit associated with giant layered igneous complex in China. But superlarge and large magmatic deposits have been discovered in many small intrusions. Therefore, research and exploration direction having great potentialities for the magmatic deposits of small intrusions is defined. The Jinchuan and Panzhihua deposits represent two important types of the magmatic deposits in China.

Keywords: small rockbody     magmatic deposits     exploration    

Study on Technology of Multistage Heat Treatment for Malleable iron

Zou Anquan,Deng Peiran,Deng Fenyan,Deng Junyan,Chen Geying

Strategic Study of CAE 2005, Volume 7, Issue 12,   Pages 74-77

Abstract:

Based on the characteristic of malleable iron, the technology of multistage heat treatment for malleable iron was investigated successfully. Compared with the present technology, the time of graphitizing annealing using new process was saved about 50% . The microstructure, with uniform distribution of fine polycrystal of graphite nuclei and full elimination of carbide, was obtained. Comprehensive mechanics performance of product exceeded that of present international standard . Two brands of KTH400 — 12 and KTZ750 - 02 can be added on the base of present international and “malleable iron” standards. Those products, such as line tool, pipe fitting for railway, engine piston of car etc, with better performances and credible qualities treated by the technology, were welcomed by users.

Keywords: malleable iron     cementite     multistage heat treatment     graphitizing annealing    

Prospects for multi-agent collaboration and gaming: challenge, technology, and application Perspective

Yu LIU, Zhi LI, Zhizhuo JIANG, You HE

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 7,   Pages 1002-1009 doi: 10.1631/FITEE.2200055

Abstract: Recent years have witnessed significant improvement of multi-agent systems for solving various decision-making problems in complex environments and achievement of similar or even better performance than humans. In this study, we briefly review multi-agent collaboration and gaming technology from three perspectives, i.e., task challenges, technology directions, and application areas. We first highlight the typical research problems and challenges in the recent work on multi-agent systems. Then we discuss some of the promising research directions on multi-agent collaboration and gaming tasks. Finally, we provide some focused prospects on the application areas in this field.

Keywords: 多智能体;博弈论;集体智能;强化学习;智能控制    

A multi-agent architecture for scheduling in platform-based smart manufacturing systems Special Feature on Industrial Internet

Yong-kui Liu, Xue-song Zhang, Lin Zhang, Fei Tao, Li-hui Wang,yongkuiliu@163.com,xs_zhang@126.com,zhanglin@buaa.edu.cn,ftao@buaa.edu.cn,lihuiw@kth.se

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 11,   Pages 1465-1492 doi: 10.1631/FITEE.1900094

Abstract: During the past years, a number of concepts have been proposed, such as cloud manufacturing, Industry 4.0, and Industrial Internet. One of their common aims is to optimize the collaborative resource configuration across enterprises by establishing s that aggregate distributed resources. In all of these concepts, a complete manufacturing system consists of distributed physical manufacturing systems and a containing the virtual manufacturing systems mapped from the physical ones. We call such manufacturing systems -based systems (PSMSs). A PSMS can therefore be regarded as a huge cyber-physical system with the cyber part being the and the physical part being the corresponding physical manufacturing system. A significant issue for a PSMS is how to optimally schedule the aggregated resources. technology provides an effective approach for solving this issue. In this paper we propose a architecture for in PSMSs, which consists of a -level system (MAS) and an enterprise- level MAS. Procedures, characteristics, and requirements of in PSMSs are presented. A model for in a PSMS based on the architecture is proposed. A case study is conducted to demonstrate the effectiveness of the proposed architecture and model.

Keywords: 平台;智能制造;多智能体;调度    

Title Author Date Type Operation

GPU-based multi-slice per pass algorithm in interactive volume illumination rendering

Dening Luo, Yi Lin, Jianwei Zhang,onexinoneyi@hotmail.com,Yilin@scu.edu.cn,zhangjianwei@scu.edu.cn

Journal Article

The Mechanics of 3D Multi-body Contact System of Long Shell and Tyres

Liang Xiaoling,Xiao Yougang,Li Xuejun

Journal Article

The Application of Multi-agent Based Distributed Intelligent Control in VAV Air Conditioning System

Zhang Hongwei,Wu Aiguo,Sheng Tao

Journal Article

Coach-assisted multi-agent reinforcement learning framework for unexpected crashed agents

Jian ZHAO, Youpeng ZHAO, Weixun WANG, Mingyu YANG, Xunhan HU, Wengang ZHOU, Jianye HAO, Houqiang LI

Journal Article

Multi-agent differential game based cooperative synchronization control using a data-driven method

Yu SHI, Yongzhao HUA, Jianglong YU, Xiwang DONG, Zhang REN

Journal Article

Predicting gas reservoir of Puguang Gas Field by applying seismic data structure characteristics abnormality method

Zeng Daqian,Lin Changrong,Zhang Shimin,Peng Xinling

Journal Article

Existence and practice of gaming: thoughts on the development of multi-agent system gaming

Qi DONG, Zhenyu WU, Jun LU, Fengsong SUN, Jinyu WANG, Yanyu YANG, Xiaozhou SHANG

Journal Article

A virtual 3D interactive painting method for Chinese calligraphy and painting based on real-time force feedback technology

Chao GUO, Zeng-xuan HOU, You-zhi SHI, Jun XU, Dan-dan YU

Journal Article

Decentralized multi-agent reinforcement learning with networked agents: recent advances

Kaiqing Zhang, Zhuoran Yang, Tamer Başar,kzhang66@illinois.edu,zy6@princeton.edu,basar1@illinois.edu

Journal Article

The Formation of Tetraploid Hybrids of Common Carp with Red Crucian Carp and the Evolutionary Significance of Tetraploidization in Vertebrate

Liu Shaojun,Cao Yunzhang,He Xiaoxiao,Li Jianzhong,Liu Yun

Journal Article

Driftor: mitigating cloud-based side-channel attacks by switching and migrating multi-executor virtual machines

Chao YANG, Yun-fei GUO, Hong-chao HU, Ya-wen WANG, Qing TONG, Ling-shu LI

Journal Article

Magmatic Ore Deposits in Small Rockbody in China

Tang Zhongli

Journal Article

Study on Technology of Multistage Heat Treatment for Malleable iron

Zou Anquan,Deng Peiran,Deng Fenyan,Deng Junyan,Chen Geying

Journal Article

Prospects for multi-agent collaboration and gaming: challenge, technology, and application

Yu LIU, Zhi LI, Zhizhuo JIANG, You HE

Journal Article

A multi-agent architecture for scheduling in platform-based smart manufacturing systems

Yong-kui Liu, Xue-song Zhang, Lin Zhang, Fei Tao, Li-hui Wang,yongkuiliu@163.com,xs_zhang@126.com,zhanglin@buaa.edu.cn,ftao@buaa.edu.cn,lihuiw@kth.se

Journal Article