Search scope:
排序： Display mode:
Du Xiangwan,Liu Xiaolong,Ge Qin,Jiang Lingling and Cui Leilei
Strategic Study of CAE 2017, Volume 19, Issue 4, Pages 119-123 doi: 10.15302/J-SSCAE-2017.04.019
The large amount of solid waste in China, if not properly handled, will cause serious environmental problems, lead to a waste of resources, and bring about adverse effects on society. Solid waste is a misplaced resource; thus, reducing or resource utilization solid waste to build a "no-waste society" will yield significant environmental, social, and economic benefits. Based on an analysis of significant existing problems hindering the construction of a "no-waste society" in China, along with feasibility studies, this paper suggests that it is necessary to promote the resource utilization of solid waste by piloting "no-waste city," from which to build a "no-waste society." Other strategic suggestions such as strengthening the top-level design, consolidating a foundation, defining stage objectives, and increasing policy support are also proposed in this paper.
Keywords： “no-waste society” “no-waste city” solid waste resource utilization strategic suggestions
Unstressed state control method for process control of structure formed by stages
Qin Shunquan
Strategic Study of CAE 2009, Volume 11, Issue 10, Pages 72-78
This paper establishes a mechanical equilibrium equation for structure in any construction process of bridge formed by stages, and thus concludes that the core of process control for stage-constructed bridge is the quantity of unstressed state of structural elements. The control and adjustment of quantity of unstressed state of the structural elements provides a solution to the problem of rection calculation for bridge constructed by stages. Based on the principle that internal force and displacement have nothing to do with the construction process on the premise of a constant quantity of unstressed state, parallel operation of multiple working procedures can be put into practice, and the automatic filtration of influences from temporary load and temperature during construction can be therefore well realized.
Keywords： bridge constructed by stages unstressed length unstressed curvature parallel operation erection calculation
A Survey of the Observability for Single Observer Passive Location
Deng Xinpu
Strategic Study of CAE 2007, Volume 9, Issue 11, Pages 54-62
A basic requirement for passive state estimation using single observer is the existence of a unique tracking solution. This leads to the question of observability. The target state is observable over the time interval if, and only if, it is uniquely determined by the measurements taken in that interval. In this paper, the state-observability problem for passive target tracking by angle measurements is analyzed using three methods: the geometrical method, the elementary algebraic method and linear system method. The observability for target tracking with frequency measurements is also analyzed. Degree of observability is discussed. And a concise review of papers on observability analysis is presented.
Keywords： passive location TMA observability
Information Sunshine: the Collisionless Information Sharing Architecture
Li Youping
Strategic Study of CAE 2000, Volume 2, Issue 1, Pages 24-27
The novel information sharing architecture, Information Sunshine, is presented in the paper. It is collisionless, and based on data broadcasting networks other than bi-directional TCP/IPs. Two core concepts of the Information Sunshine idea are Data Stream Environment (DSE) and Personal Demanding Code (PDC). The DSE means that several hundreds gigabytes stream to each household everyday utilizing the great data push .capacity of DVB, and then the nationwide flow of the high speed data stream forms a digital environment. The data flux is so great that thousands of papers, periodicals, Web Server and courseware could be rolling broadcast for several dozens times per day. The PDC code helps each user distinguish favorite contents from broadcasting data stream and intercept them into local hard disk. After storing, users can locally interact with the information without remote connection requirement. Only single-way broadcasting network required by the Information Sunshine architecture, so it is low cost and will drastically eliminate inherent bandwidth collision of bi-directional IP architecture.
Keywords： Data broadcasting DVB network collisionless
Constructing a “No-Waste Society”
Liu Xiaolong, Jiang Lingling, Ge Qin, Huhetaoli, Chen Ying, Cui Leilei, Li Bin, Du Xiangwan
Strategic Study of CAE 2019, Volume 21, Issue 5, Pages 144-150 doi: 10.15302/J-SSCAE-2019.05.003
Solid waste reduction and resource utilization is a sign of national progress and modernization. The massive amount of solid wastes produced in industrial production and daily life in China has not been well treated, and the annual output of solid wastes is growing year by year. It is proposed in this paper that “no-waste society” is not a society without solid waste production, but a society where most of its solid wastes are properly reused as resources. “No-waste society” is guided by the new development concepts of innovation, coordination, green, openness, and sharing, and promotes green and recycling development and living modes, thus to achieve source reduction, resource utilization, and harmless treatment of solid wastes to the maximum extent. This paper further clarifies the boundary and scope for the “no-waste society”, depicts its characteristics, and proposes the general idea and direction of developing from “no-waste city” to “no-waste society”. Furthermore, policy measures are proposed including strengthening collaboration and supervision; advocating a diligent and thrifty life concept; and enhancing international exchange to actively participate in the construction of a global system for environment governance.
Keywords： no-waste society no-waste city solid waste resource utilization production mode life mode
Li Mingling
Strategic Study of CAE 2009, Volume 11, Issue 1, Pages 48-59
The criterion for residual deformation of Substructure of unballasted track on railway passenger dedicated line is extremely strict in order to satisfy the safety and comfort requirements of the high-speed train. Based on new Wuhan(Guangzhou railway passenger dedicated line engineering practice,this paper introuduces the key technologies for the deformation monitoring, data management and analysis system, the prediction method and assessment criterion are put forward to determine the reasonable time of unballasted track laying to guarantee the quality of unballasted track. Some advice provide reference for the ongoing unballasted track on railway passenger dedicated line construction.
Keywords： unballasted track deformation monitoring analysis and assessment condiction for unballasted track laying
Passive Intermodulation Measurement: Challenges and Solutions Review
Zhanghua Cai, Lie Liu, Francesco de Paulis, Yihong Qi
Engineering 2022, Volume 14, Issue 7, Pages 181-191 doi: 10.1016/j.eng.2022.02.012
In modern wireless communication systems, the signal-to-noise ratio (SNR) is one of the most important performance indicators. When the other radio frequency (RF) performance of the components is well designed, passive intermodulation (PIM) interference may become an important factor limiting the system’s SNR. Whether it is a base station, an indoor distributed antenna system, or a satellite system, there are stringent PIM level requirements to minimize interference and enhance network capacity in multicarrier networks. Especially for systems of high power and wide bandwidth such as 5G wireless communication, PIM interference is even more serious. Due to the complexity and uncertainty of PIM, measurement is the most important means to study and evaluate the PIM performance of wireless communication systems. In this review, the current main PIM measurement methods recommended by International Electrotechnical Commission (IEC) and other standard organizations are introduced, and several key challenges in PIM measurement and their solutions (including the design of PIM tester, the location of the PIM sources, the design of compact PIM anechoic chambers, and the evaluation methods of PIM anechoic chambers) are highlighted. These challenges are of great significance to solve PIM problems that may arise during device characterization and verification in real wireless communication systems.
Keywords： Passive intermodulation (PIM) PIM source location Anechoic chamber
Fei Decheng,Zhu Huangqiu
Strategic Study of CAE 2005, Volume 7, Issue 11, Pages 48-54
A decoupling control approach based on dynamic inverse system theory has been developed for the bearingless permanent magnet synchronous motor (BPMSM), which is a multi-variable, nonlinear and strong-coupled system. Firstly, inverse system theory is briefly introduced. Secondly, the principle of suspension forces is expounded, and the state equations of torque force and radial suspension forces are set up. Then feasibility of decoupling control based on dynamic inversion theory for BPMSM is discussed in detail, and the dynamic decoupling control arithmetic based on inverse system is deduced. Finally, the simulation results have showed that this kind of control strategy can realize dynamic decoupling control between torque force and radial suspension forces, and the control system has fine dynamic and static performance.
Keywords： BPMSM inverse system dynamic feedback linearization decoupling control
Unsupervised feature selection via joint local learning and group sparse regression Regular Papers
Yue WU, Can WANG, Yue-qing ZHANG, Jia-jun BU
Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 4, Pages 538-553 doi: 10.1631/FITEE.1700804
Feature selection has attracted a great deal of interest over the past decades. By selecting meaningful feature subsets, the performance of learning algorithms can be effectively improved. Because label information is expensive to obtain, unsupervised feature selection methods are more widely used than the supervised ones. The key to unsupervised feature selection is to find features that effectively reflect the underlying data distribution. However, due to the inevitable redundancies and noise in a dataset, the intrinsic data distribution is not best revealed when using all features. To address this issue, we propose a novel unsupervised feature selection algorithm via joint local learning and group sparse regression (JLLGSR). JLLGSR incorporates local learning based clustering with group sparsity regularized regression in a single formulation, and seeks features that respect both the manifold structure and group sparse structure in the data space. An iterative optimization method is developed in which the weights finally converge on the important features and the selected features are able to improve the clustering results. Experiments on multiple real-world datasets (images, voices, and web pages) demonstrate the effectiveness of JLLGSR.
Keywords： Unsupervised Local learning Group sparse regression Feature selection
Dynamic parameterized learning for unsupervised domain adaptation Research Article
Runhua JIANG, Yahong HAN
Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 11, Pages 1616-1632 doi: 10.1631/FITEE.2200631
Keywords： Unsupervised domain adaptation Optimization steps Domain alignment Semantic discrimination
Yuan liang
Strategic Study of CAE 2009, Volume 11, Issue 5, Pages 72-80
This thesis, based on innovations and practices of methane drainage in multiseams of low permeability and complicated geology in Huainan mining district, systematically describes theories and key technologies of integrated pillarless coal production and methane extraction with "Y" type ventilation system in multiseams of low permeability. Through analyses of deformation, fracturing and failure of rocks around goaf, methane movement and accumulation in and around the goaf are revealed, technologies to retain goaf edge roadways with innovative fill technologies are developed, and technological innovations in methane extraction are made with the retained goaf edge roadways and "Y" type ventilation systems.
Keywords： coal seams of low-permeability integrated pillarless retained roadway methane coal production and methane extraction
Design of unballasted track bridges in Beijing-Tianjin inter-city railway
Sun Shuli,Zhang Wenjian,Wang Zhaohu,Su Wei,Wu Cailan,Bu Qinghao
Strategic Study of CAE 2009, Volume 11, Issue 1, Pages 32-42
Beijing-Tianjin inter-city railway is the first built passenger dedicated line with the speed of 350 km/h in our country. During the design, new ideas of bridge construction were carried out in order to ensure the safety, amenity and stability requirements of the train under high-speed condition. At the same time, concepts of environmental adaptability, serving for transportation and comprehensive benefits were followed. In the whole line of the railway, long-bridge scheme was adopted, and the most advanced technology of unballasted track was utilized in bridges which account for 87.7 % of the total line. The success of the design and construction of bridges in Beijing-Tianjin inter-city railway accumulated valuable experiences for large-scale construction of high-speed railway at the future. And roles of demonstration, landmark and prototype are played at the same time.
Keywords： Beijing-Tianjin inter-city railway unballasted track bridge design concept
Zhu Huangqiu,Wu Liang,Zhou Yang,Zhang Tengchao,Deng Jianming
Strategic Study of CAE 2006, Volume 8, Issue 6, Pages 35-40
The bearingless permanent magnet synchronous motor (BPMSM) is an innovational type of motor, which has all excellence of magnetic bearings. In the paper, based on the basic working principle of BPMSM, the mathematical models of the radial forces and rotation part on BPMSM are deduced by adopting rotor magnetic field oriented control strategy. A digital vector control system according to the demand of decoupling is designed by using TMS320LF2407 DSP technique. The hardware and the software of the digital control system are developed in this paper. The experimental results have shown that the steady suspension of the rotor is realized and the speed of the rotor can be continuously adjusted within the range of 0〜3 000 r/min.
Keywords： bearingless permanent magnet synchronous motor decoupling control DSP digital control
Strategic Suggestions on the Construction of a“No-Waste Xiong’an New Area”
Du Xiangwan,Liu Xiaolong,Ge Qin,Jiang Lingling,Yang Bo,Chen Shoushuang,Jiang Yuan and Xu Lin
Strategic Study of CAE 2017, Volume 19, Issue 4, Pages 115-118 doi: 10.15302/J-SSCAE-2017.04.018
Traditional urban construction and operations often produce large amounts of waste. If not handled properly, such waste exerts a negative impact on the environment, resources, and society. The construction of a "no waste society" can achieve win-win situation for energy, environment, economic and society altogether. A "no-waste society" is not only an important symbol but also an inevitable goal of social progress. The construction of the Xiong’an New Area is a national event which would bring long-term interests for generations to come. The authors of this paper propose that we should take the lead in building a model for the planning and development of Xiong’an New Area under the concept of "no waste", so as to lay the foundation for the overall construction of "no-waste society". As it analyzes the significance of building a "no-waste Xiong'an New Area," this paper puts forward construction ideas for optimizing the layout of energy and industry, constructing a system of solid waste classification and resource utilization, and establishing a social management system. It also makes a few strategic suggestions regarding the construction of a "no-waste Xiong'an New Area."
Keywords： “no-waste Xiong’an New Area” solid waste resource utilization distributed low-carbon energy
Insights into the Organotemplate-Free Synthesis of Zeolite Catalysts
Yeqing Wang,Qinming Wu,Xiangju Meng,Feng-Shou Xiao
Engineering 2017, Volume 3, Issue 4, Pages 567-574 doi: 10.1016/J.ENG.2017.03.029
As the most important nanoporous material, zeolites, which have intricate micropores, are essential heterogeneous catalysts in industrial processes. Zeolites are generally synthesized with organic templates under hydrothermal conditions; however, this method is environmentally unfriendly and costly due to the formation of harmful gases and polluted water. This article briefly summarizes the role of organic templates and describes designed routes for the organotemplate-free synthesis of zeolites, aided by zeolite seeds and zeolite seeds solution. Furthermore, this review explicates that the micropore volume decreases with an increase of the Si/Al ratios in the organotemplate-free synthesis of zeolite products, where Na+ exists as an alkali cation. This feature is very important in directing the synthesis of zeolite catalysts with controllable Si/Al ratios under organotemplate-free conditions, and is thus important for the efficient design of zeolites.
Keywords： Zeolite seed-directed synthesis Organotemplate-free synthesis Zeolite seeds solution Si/Al ratios Zeolite micropore volume
Title Author Date Type Operation
A Preliminary Study on the Strategy of Construction a “No-Waste Society” by Piloting “No-Waste City” to Promote the Resource Utilization of Solid Waste
Du Xiangwan,Liu Xiaolong,Ge Qin,Jiang Lingling and Cui Leilei
Journal Article
Unstressed state control method for process control of structure formed by stages
Qin Shunquan
Journal Article
Constructing a “No-Waste Society”
Liu Xiaolong, Jiang Lingling, Ge Qin, Huhetaoli, Chen Ying, Cui Leilei, Li Bin, Du Xiangwan
Journal Article
Deformation monitoring and assessment technology for substructure of unballasted track on railway passenger dedicated line
Li Mingling
Journal Article
Passive Intermodulation Measurement: Challenges and Solutions
Zhanghua Cai, Lie Liu, Francesco de Paulis, Yihong Qi
Journal Article
Study on Decoupling Control of Bearingless Permanent Magnet Synchronous Motors Based on Inverse System Theory
Fei Decheng,Zhu Huangqiu
Journal Article
Unsupervised feature selection via joint local learning and group sparse regression
Yue WU, Can WANG, Yue-qing ZHANG, Jia-jun BU
Journal Article
Dynamic parameterized learning for unsupervised domain adaptation
Runhua JIANG, Yahong HAN
Journal Article
Theory and practice of integrated pillarless coal production and methane extraction in multiseams of low permeability
Yuan liang
Journal Article
Design of unballasted track bridges in Beijing-Tianjin inter-city railway
Sun Shuli,Zhang Wenjian,Wang Zhaohu,Su Wei,Wu Cailan,Bu Qinghao
Journal Article
The Research on Rotor Magnetic Flux Oriented Control System for Bearingless Permanent Magnet Synchronous Motor
Zhu Huangqiu,Wu Liang,Zhou Yang,Zhang Tengchao,Deng Jianming
Journal Article
Strategic Suggestions on the Construction of a“No-Waste Xiong’an New Area”
Du Xiangwan,Liu Xiaolong,Ge Qin,Jiang Lingling,Yang Bo,Chen Shoushuang,Jiang Yuan and Xu Lin
Journal Article
京公网安备 11010502051620号
