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A descent method for the Dubins traveling salesman problem with neighborhoods Research Articles
Zheng Chen, Chen-hao Sun, Xue-ming Shao, Wen-jie Zhao,z_chen@zju.edu.cn,mecsxm@zju.edu.cn
Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 5, Pages 615-766 doi: 10.1631/FITEE.2000041
Keywords: Dubins飞行器;坐标下降法;Dubins旅行商问题
Block coordinate descent with time perturbation for nonconvex nonsmooth problems in real-world studies Research Article
Rui Liu, Wei-chu Sun, Tao Hou, Chun-hong Hu, Lin-bo Qiao,liuruirui@csu.edu.cn,smsysun@foxmail.com,houtao@csu.edu.cn,huchunhong@csu.edu.cn,qiao.linbo@nudt.edu.cn
Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 10, Pages 1390-1403 doi: 10.1631/FITEE.1900341
Keywords: 收敛分析;异步块坐标下降法;时间扰动;非凸非平滑优化;真实世界研究
Fractional-order global optimal backpropagation machine trained by an improved fractional-order steepest descent method Research Articles
Yi-fei Pu, Jian Wang,puyifei@scu.edu.cn,wangjiannl@upc.edu.cn
Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 6, Pages 809-962 doi: 10.1631/FITEE.1900593
Wu Xiugang,Shen Yongming,Zheng Yonghong,Yang Zhifeng
Strategic Study of CAE 2003, Volume 5, Issue 2, Pages 57-61
Based on depth-averaged mathematic model of flow and pollutant transportation in non-orthogonal curvilinear coordinates, the k-ε double equations´ turbulence model and the coupling arithmetic of velocity-water depth are adopted, which are applied to the numerical simulation of the flow and the contamination diffusion-transportation. The flow field and concentration of discharge both along bank and in the centerline of the meandering channel in laboratory are calculated, and the calculating results accord well with the measured data.
Keywords: curvilinear coordinates meandering channel diffusion-transportation IMPLEC algorithm concentration field
Wu Xiuguang,Shen Yongming,Wang Min,Yang Zhifeng
Strategic Study of CAE 2005, Volume 7, Issue 7, Pages 60-64
The shallow-water equations and pollutant convective-diffusive equation are transformed into curvilinear coordinate system. The anisotropic algebraic-stress turbulent model is introduced to simulate the turbulence items, and algebraic-stress turbulent model of planar 2-D pollutant convection-diffusion in curvilinear coordinates is built. The meandering channel with measured data of concentration in lab is adopted to validate the model. The comparison between the distribution figure of pollutant concentration field calculated through this model and that of the k-ε model shows the model in the paper is superior to k-ε turbulent model in dealing with anisotropy.
Keywords: pollutant convection-diffusion anisotropic algebraic-stress turbulent model k-ε model
HAM: a deep collaborative ranking method incorporating textual information Research Articles
Cheng-wei Wang, Teng-fei Zhou, Chen Chen, Tian-lei Hu, Gang Chen,rr@zju.edu.cn,zhoutengfei@zju.edu.cn,cc33@zju.edu.cn,htl@zju.edu.cn,cg@zju.edu.cn
Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 8, Pages 1119-1266 doi: 10.1631/FITEE.1900382
Keywords: 深度学习;推荐系统;高速公路网络;块坐标梯度下降
Study on Down Knock-in Renewal Option Pricing
Wu Yun,He Jianmin
Strategic Study of CAE 2004, Volume 6, Issue 12, Pages 47-50
In this paper, firstly, the basic connotation of modern leasing and the basic principle of real option are dissertated. Then, the down knock-in renewal option pricing model and its solution are put forward. At last, example is provided.
Keywords: leasing renewal leasing option real option down knock-in option
Deep Underground Energy Storage: Aiming for Carbon Neutrality and Its Challenges
Chunhe Yang, Tongtao Wang
Engineering 2023, Volume 29, Issue 10, Pages 11-14 doi: 10.1016/j.eng.2023.02.010
Lu Zhongwu,Mao Jiansu
Strategic Study of CAE 2003, Volume 5, Issue 12, Pages 36-42
The curve of environmental impact in the process of economic growth in developed countries was likened to “environmental mountain”. For developing countries, particularly China, the right way of economic development is going through the “environmental mountain” on the halfway up the mountain - a new way for industrialization. The formulas of the relationship between environmental impact and GDP were derived, in which there are 2 key variables: g—growth rate of GDP; t—decreasing rate of environmental impact per unit GDP. Taking several countries and provinces in China as examples, the relationships between economic growth and energy consumption were studied. The environmental impacts of China in the years 2005, 2010 and 2020 were anticipated under different assumptions, and further discussion was given in terms of energy consumption.
Keywords: “environmental mountain” environmental impact growth rate of GDP environmental impact per unit GDP decreasing rate of environmental impact per unit GDP
Global CO2 Emissions Level Off in 2019, with a Drop Predicted in 2020
Sean O’Neill
Engineering 2020, Volume 6, Issue 9, Pages 958-959 doi: 10.1016/j.eng.2020.07.005
Bofeng Cai,Li Zhang,Yu Lei,Jinnan Wang
Engineering 2023, Volume 30, Issue 11, Pages 27-29 doi: 10.1016/j.eng.2022.06.014
Dynamics Modeling of Spacecraft with Composite Flexible Structures
Qu Guangji,Cheng Daosheng
Strategic Study of CAE 1999, Volume 1, Issue 2, Pages 52-56
It is a conventional method to build dynamic models of flexible spacecraft with hybrid coordinates. This kind of modeling has gotten a great success both in theory and practice to spacecraft with rigid main body and large flexible appendages. However, modern spacecraft are becoming much bigger and more and more complicated. Their developing trend in structure is: 1. Rigid main body is attached by flexible module, to which kinds of large flexible appendages are fixed. This kind of spacecraft is a complicated structure system composed of rigid main body and composite flexible structures; 2. The flexible multi-modules main body, taking on a lower stiffness, and several kinds of large flexible appendages attached to it make the whole spacecraft as an all-flexible structure system.
It is impossible to build the dynamic equations of a spacecraft by its flexible modes, when some of its flexible appendages are not fixed to the rigid main body directly. In order to take full advantage of the achievement of spacecraft dynamics of rigid main body with flexible appendages, this paper makes dynamic models of composite flexible structure spacecraft by hybrid coordinates with taking into consideration the composite transition of linking point between flexible bodies. The corresponding computing software DASFA 2.0 has been used in space engineering design and analysis.
Keywords: spacecraft composite flexible structure dynamics of flexible structures hybrid coordinate method
Yinao Su, Houliang Dai, Lichun Kuang, Jizhen Liu, Dazhao Gu, Caineng Zou, Haixia Huang
Engineering 2021, Volume 7, Issue 12, Pages 1684-1687 doi: 10.1016/j.eng.2021.10.010
Deformation monitoring on Three Gorges Project ship lift tower during construction period
Qiu Zhangyun,Luo Chen
Strategic Study of CAE 2013, Volume 15, Issue 9, Pages 102-107
This paper begins with internal and external factors as well as field operating conditions during the monitoring process. According to the accuracy analysis which is done to several typical monitoring methods and the study which is done to the 360° reflecting prism test, the final choice is that total station polar coordinate would be used as the deformation monitoring method of Three Gorges Project ship lift tower during construction period, and deformation analysis is received using the long-term monitoring data obtained by the use of the method. The results show that tower deformation is greatly affected by temperature; the greater the temperature difference, the greater the deformation. It would be small deformation or even no deformation when temperature difference is small or under constant temperature.
Keywords: Three Gorges Project ship lift tower column deformation monitoring total station polar coordinate
Geolocation method of HY-2 satellite microwave radiometer
Wu Kuiqiao,Lin Mingsen,Guo Zhenyu
Strategic Study of CAE 2014, Volume 16, Issue 6, Pages 21-26
Using cone scanning method, microwave radiometer of HY-2 satellite measures the SST and the atmosphere of the earth. This article represents one geolocation method applied to the microwave radiometer of HY-2 satellite according to the geometry model. The image of microwave radiometer was geolocationed with this method, and the result was evaluated at last.
Keywords: HY-2 satellite geolocation coordinate system
Title Author Date Type Operation
A descent method for the Dubins traveling salesman problem with neighborhoods
Zheng Chen, Chen-hao Sun, Xue-ming Shao, Wen-jie Zhao,z_chen@zju.edu.cn,mecsxm@zju.edu.cn
Journal Article
Block coordinate descent with time perturbation for nonconvex nonsmooth problems in real-world studies
Rui Liu, Wei-chu Sun, Tao Hou, Chun-hong Hu, Lin-bo Qiao,liuruirui@csu.edu.cn,smsysun@foxmail.com,houtao@csu.edu.cn,huchunhong@csu.edu.cn,qiao.linbo@nudt.edu.cn
Journal Article
Fractional-order global optimal backpropagation machine trained by an improved fractional-order steepest descent method
Yi-fei Pu, Jian Wang,puyifei@scu.edu.cn,wangjiannl@upc.edu.cn
Journal Article
Numerical Computation of Flow and Pollutant Diffusion - Transportation With Non-orthogonal Curvilinear Coordinates
Wu Xiugang,Shen Yongming,Zheng Yonghong,Yang Zhifeng
Journal Article
Algebraic-stress Turbulent Model of Planar 2-D Pollutant Convection-Diffusion in Curvilinear Coordinates
Wu Xiuguang,Shen Yongming,Wang Min,Yang Zhifeng
Journal Article
HAM: a deep collaborative ranking method incorporating textual information
Cheng-wei Wang, Teng-fei Zhou, Chen Chen, Tian-lei Hu, Gang Chen,rr@zju.edu.cn,zhoutengfei@zju.edu.cn,cc33@zju.edu.cn,htl@zju.edu.cn,cg@zju.edu.cn
Journal Article
Deep Underground Energy Storage: Aiming for Carbon Neutrality and Its Challenges
Chunhe Yang, Tongtao Wang
Journal Article
Crossing “Environmental Mountain”——On the Increase and Decrease of Environment Impact in the Process of Economic Growth
Lu Zhongwu,Mao Jiansu
Journal Article
A Deeper Understanding of the CO2 Emission Pathway under China’s Carbon Emission Peak and Carbon Neutrality Goals
Bofeng Cai,Li Zhang,Yu Lei,Jinnan Wang
Journal Article
Dynamics Modeling of Spacecraft with Composite Flexible Structures
Qu Guangji,Cheng Daosheng
Journal Article
Contemplation on China’s Energy-Development Strategies and Initiatives in the Context of Its Carbon Neutrality Goal
Yinao Su, Houliang Dai, Lichun Kuang, Jizhen Liu, Dazhao Gu, Caineng Zou, Haixia Huang
Journal Article
Deformation monitoring on Three Gorges Project ship lift tower during construction period
Qiu Zhangyun,Luo Chen
Journal Article