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Approximation Space of Generalization and Rough Classification Algebra
Liu Yonghong
Strategic Study of CAE 2006, Volume 8, Issue 3, Pages 39-48
Some new basic concepts are proposed in this paper, including the approximation space of generalization, rough approximation axiom, disturbance set axiom, classification principle of rough set, principle of nondeterministic even set, principle of concentration, game classification, quantum logic classification, bit quantum symmetric classification, incomparable set, bit space set, protocol relation, rough set function of protocol relation, rough classification algebra, rough simple algebra, etc. , and a guess is also proposed. The mathematics viewpoints of knowledge are shown. Based on the protocol relation, the rough quotient algebra and the rough subalgebra are constructed. The avoidance-merge algorithm (A - M algorithm) is presented and an example is given.
Keywords： approximation space of generalization rough set rough classification algebra protocol relation rough simple algebra rough quotient algebra rough subalgebra
Modeling and performance analysis of OAM-GSM millimeter-wave wireless communication systems
Qi Zhang, Xusheng Xiong, Qiang Li, Tao Han, Yi Zhong,qiqiz@hust.edu.cn,xiongxusheng@hust.edu.cn,qli_patrick@hust.edu.cn,hantao@hust.edu.cn,yzhong@hust.edu.cn
Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 4, Pages 527-547 doi: 10.1631/FITEE.2000444
Keywords： 轨道角动量；广义空间调制；毫米波通信；信道容量；能量效率；误比特率
Output Feedback Control for the Descriptor TS Fuzzy Systems With Pole-placement Constraints
Gao Dan,Cao Yuanyuan
Strategic Study of CAE 2006, Volume 8, Issue 4, Pages 63-67
The design of dynamic output-feedback controller is investigated for the descriptor fuzzy TS models. By transforming the design problem into the feasible solution problems to a set of linear matrix inequalities, the properly stabilizing output controllers are obtained. The resulting closed-loop system can be ensured to satisfy certain performance index and locate at the required pole-placement region.
Keywords： singular fuzzy system dynamic output-feedback LMI pole placement
High efficiency spreading spectrum modulation based on double orthogonal complex sequences
Shi Xiaohong
Strategic Study of CAE 2012, Volume 14, Issue 3, Pages 108-112
This paper presents a kind of high efficiency spreading spectrum modulation scheme using double orthogonal complex sequences (DoCS). In this scheme, input data bit-stream is split into many groups with length M. Each group is then mapped into a word of width M and then utilized to select one sequence from 2M-2 DoCS sequences each with length L. After that, the selected sequence is modulated on carrier in QPSK(quadrature phase shift keying) mode. In addition, a novel method named forward phase correction (FPC) is put forward for carrier recovery.
Keywords： modulation and demodulation high efficiency spreading spectrum modulation forward phase correction double orthogonal complex sequences
Graphene-based siliconmodulators Special Feature on Optoelectronic Devices and Inte
Hao-wen SHU, Ming JIN, Yuan-sheng TAO, Xing-jun WANG
Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 4, Pages 458-471 doi: 10.1631/FITEE.1800407
Silicon photonics is a promising technology to address the demand for dense and integrated nextgeneration optical interconnections due to its complementary-metal-oxide-semiconductor (CMOS) compatibility. However, one of the key building blocks, the silicon modulator, suffers from several drawbacks, including a limited bandwidth, a relatively large footprint, and high power consumption. The graphene-based silicon modulator, which benefits from the excellent optical properties of the two-dimensional graphene material with its unique band structure, has significantly advanced the above critical figures of merit. In this work, we review the state-of-the-art graphenebased silicon modulators operating in various mechanisms, i.e., thermal-optical, electro-optical, and plasmonic. It is shown that graphene-based silicon modulators possess the potential to have satisfactory characteristics in intra- and inter-chip connections.
Keywords： Silicon photonics Graphene Optical modulator
Exploration and research of space physics and space weather
Wang Chi
Strategic Study of CAE 2008, Volume 10, Issue 6, Pages 41-45
Space physics is a fast-growing cross-discipline science with the advance of satellite technology since 1957. Space environment is becoming more and more important as the fourth living environment for human being. Starting from the early 1990s, space weather is born by applying the fundamentals of space physics to applications. The space weather study is aimed to investigate and alleviate the disaster effects of solar activity on our high-tech systems on the earth and in space. This report gives a brief summary of the history, current status and future direction of the international space physics and space weather exploration and study, and introduces the suggested space physics and space weather mid-long term development strategic plan and exploration roadmap.
Keywords： space physics space weather space physics exploration strategic plan
Generalized Plastic Mechanics and Its Application
Zheng Yingren,Kong Liang
Strategic Study of CAE 2005, Volume 7, Issue 11, Pages 21-36
The development of geotechnical plasticity is reviewed and some problems of applying the classic plastic mechanics to geomaterials are analyzed, and then its three hypotheses not fit for the deformation mechanism of geomaterials are pointed out. By giving up the three hypotheses, a generalized plastic potential theory can be obtained from solid mechanics directly, and then the traditional plastic mechanics can be changed to a more generalized plastic mechanics, namely generalized plastic mechanics (GPM). The GPM adopts the component theory as theoretical base, so it can reflect the influence of transition of stress path. The unreasonable phenomena such as excessive dilatancy caused by adopting the normality-flow law can be avoided, and the error caused by the arbitrary assumption of plastic potential surfaces cannot be produced. The yield surface theory, hardening laws and stress-strain relations of GPM are given, and a GPM including the rotation of principal stress axes is also established. It is pointed out that the yield condition is a state parameter as well as a test parameter, and it can only be given by test. After the practical application, it is shown that the GPM can not only be applied to the modeling theory of geomaterials but also to other fields of geomechanics, such as limit analysis.
Keywords： geotechnical plastic mechanics generalized plastic mechanics plastic potential yield surface constitutive model
Coordinated Development of Space Science, Space Technology, and Space Application in China
Zhou Jianping, Wu Ji
Strategic Study of CAE 2023, Volume 25, Issue 2, Pages 59-66 doi: 10.15302/J-SSCAE-2023.02.007
Owing to historical reasons and investment restrictions, China’s aerospace industry initially focused on space technology and application, with insufficient emphasis on space science; therefore, space science, technology, and application developed independently. The development of space technology should be deeply integrated into space science and application, thus to strengthen China’s aerospace industry and create new opportunities and achievements. This study explores the implications of space science, space technology, and space application and clarifies their interrelationships. Moreover, it systematically analyzes the development trend in space science, technology, and application worldwide and reviews the development situation of space-related fields in China. Based on this, it examines the necessity for coordinating the development of space science, technology, and application in China and summarizes the major challenges. Considering their overlapping needs and mutual promotion, space science, technology, and application should be coordinated throughout the process of planning, deployment, and implementation. First, the advantages of the new national system should be exploited to conduct top-level planning under unified management. Second, the innovation-driven development strategy should be insisted to promote the international competitiveness of China’s aerospace industry through technological progress. Third, basic research in the space field should be strengthened and high-level scientists and engineers should be cultivated. Lastly, resource planning and coordination should be strengthened to promote the rational opening and full utilization of space application data.
Keywords： aerospace industry space science space technology space application coordinated development sharing of space data
Comprehensive Discussion on the Extension of Generalized Uncertainty Systems Theory
Wang Qingyin,Lii Ruihua
Strategic Study of CAE 2005, Volume 7, Issue 10, Pages 16-22
Based on comprehensive discussion on the connotation of generalized uncertainty systems theory, this paper discusses the extension of generalized uncertainty systems theory as well as the basic frame and principle of correlation theory. It is a base to study generalized uncertainty systems theory.
Keywords： generalized uncertainty information uncertainty mathematics generalized uncertainty systems theory
The Argument Foundation of Generalized Uncertainty Systems Theory
Wang Qingyin,Guo Litian,Xie Jianhua,Liu Zhiyong
Strategic Study of CAE 2004, Volume 6, Issue 3, Pages 25-29
The paper discusses the brief development of uncertainty system theory at home and abroad, gives the definition of uncertainty systems, and presents the basic conception, basic structure, argument foundation and scientific meaning of generalized uncertain system theory (GUST).
Keywords： uncertainty information generalized uncertainty system basic structure
Xu Xiangde,Ding Guoan
Strategic Study of CAE 2012, Volume 14, Issue 10, Pages 10-22
An ensemble platform on generalized source tracking of urban air pollutants and an emission source assimilation with application of satellite remote sensing has been proposed. The ensemble platform of generalized urban air pollutant source tracking is built on principal factor analysis of aerosol emissions, aerosol variation spectrum analysis, feature analysis on aerosol changes with phase within urban canopy layer, wind vectors correlating with remote pollutant transport, back forward trajectories and boundary layers affecting the foot mark methods. Also, in order to reduce the emission source uncertainties, which is a key difficulty in air quality modeling, the Newton approximation nudging technology has been applied in the air pollutant modeling based on the seasonal or monthly SO2 and NO2 emissions, and the remote sensing data of air pollutants have been applied on the data assimilation in air pollutant modeling. The integration approach with remote sensing and ground based observations could be used in the research on urban air pollutant tracking, urban haze and heat island. The comprehensive analysis of land water air cycles is attempted as an exploratory study on water pollutant source tracking.
Keywords： generalized method nudging source pollutant source tracking satellite remote sensing surface land water air
Research on Cyberspace Sovereignty
Fang Binxing,Zou Peng and Zhu Shibing
Strategic Study of CAE 2016, Volume 18, Issue 6, Pages 1-7 doi: 10.15302/J-SSCAE-2016.06.001
Cyberspace sovereignty (referred to here by its short form, cyber sovereignty) is the extension of national sovereignty to the platform of information and communication technology systems. This article defines cyberspace and cyber sovereignty, discusses the existence of cyber sovereignty, and judges several erroneous points of view that deny cyber sovereignty.
Keywords： cyberspace cyberspace sovereignty stakeholder
Yu-tang ZHU,Yong-bo ZHAO,Jun LIU,Peng-lang SHUI
Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 11, Pages 1245-1252 doi: 10.1631/FITEE.1601112
Keywords： Beamforming General-rank Low complexity Positive semidefinite (PSD) constraint Model mismatches
Research on the International Strategy for National Cyberspace Security
Fang Binxing,Du Aning and Zhang Xi,Wang Zhongru
Strategic Study of CAE 2016, Volume 18, Issue 6, Pages 13-16 doi: 10.15302/J-SSCAE-2016.06.003
Cyberspace security has been a crucial part in national security and is more and more important in the development of economy and society. Based on the current situation of international cyberspace security, this article analyzes the opportunities and challenges that China is confronted with, and study China's international cyberspace security strategy suitable for its own value and national interest. We then propose the objectives, principles and tasks of the strategy.
Keywords： cyberspace security cyberspace governance cyberspace strategy
Characters of topological relations and its applications in spatial reasoning
Li Chengming and Liu Xiaoli
Strategic Study of CAE 2013, Volume 15, Issue 5, Pages 14-19
In the paper,the formal representation of topological relationships are proposed according to our early research results, and the characters are also introduced. Based on these characters, the results for com-posite topological relations are introduced. At last, the applications in spatial reasoning are proposed.
Keywords： topological relationship composite of topological relations spatial reasoning algbra reasoning logical reasoning
Title Author Date Type Operation
Modeling and performance analysis of OAM-GSM millimeter-wave wireless communication systems
Qi Zhang, Xusheng Xiong, Qiang Li, Tao Han, Yi Zhong,qiqiz@hust.edu.cn,xiongxusheng@hust.edu.cn,qli_patrick@hust.edu.cn,hantao@hust.edu.cn,yzhong@hust.edu.cn
Journal Article
Output Feedback Control for the Descriptor TS Fuzzy Systems With Pole-placement Constraints
Gao Dan,Cao Yuanyuan
Journal Article
High efficiency spreading spectrum modulation based on double orthogonal complex sequences
Shi Xiaohong
Journal Article
Graphene-based siliconmodulators
Hao-wen SHU, Ming JIN, Yuan-sheng TAO, Xing-jun WANG
Journal Article
Coordinated Development of Space Science, Space Technology, and Space Application in China
Zhou Jianping, Wu Ji
Journal Article
Comprehensive Discussion on the Extension of Generalized Uncertainty Systems Theory
Wang Qingyin,Lii Ruihua
Journal Article
The Argument Foundation of Generalized Uncertainty Systems Theory
Wang Qingyin,Guo Litian,Xie Jianhua,Liu Zhiyong
Journal Article
Generalized method of urban air pollutant source tracking and integration approach of nudging source assimilation
Xu Xiangde,Ding Guoan
Journal Article
Low complexity robust adaptive beamforming for general-rank signal model with positive semidefinite constraint
Yu-tang ZHU,Yong-bo ZHAO,Jun LIU,Peng-lang SHUI
Journal Article
Research on the International Strategy for National Cyberspace Security
Fang Binxing,Du Aning and Zhang Xi,Wang Zhongru
Journal Article
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