Xiao G.,CAS Institute of Earth Environment |
Xiao G.,Wuhan University |
Guo Z.,CAS Institute of Geology and Geophysics |
Dupont-Nivet G.,CNRS Geosciences Laboratory of Rennes |
And 10 more authors.
Earth and Planetary Science Letters | Year: 2012
The growth history of the Tibetan Plateau provides a valuable natural laboratory to understand tectonic processes of the India-Asia collision and their impact on and interactions with Asian and global climate change. However, both Tibetan Plateau growth and Asian paleoenvironments are generally poorly documented in pre-Pliocene times and reflect limited temporal coverage for different parts of the plateau. Here we present magnetostratigraphic results from the Xining Basin, at the NE margin of the Tibetan Plateau, precisely dating the record between the earliest Oligocene (~33. Ma) to the middle Miocene (~16. Ma). The pattern of observed paleomagnetic polarity zones is unequivocally correlated to the geomagnetic polarity time scale (GPTS) indicating relatively constant and low sediment accumulation rates (32. m/Myr) except for a peculiar period of unstable accumulation between 25.3 and 19.7. Ma. At the beginning of this interval, a marked permanent increase in magnetite content of the sediments is observed and likely relates to a change in provenance. We directly relate this unstable period of sediment accumulation and provenance change to the coeval exhumation recently reported by low-temperature thermochronology from the Laji Shan range, which subsequently formed the southern margin of the Xining Basin. Evidence for NE Tibet tectonism at 25-20. Ma can be associated with widespread deformation over the entire Himalayan-Tibetan orogen at this time, which may be linked to the coeval appearance of monsoon climate in Eastern Asia and the onset of central Asian desertification. © 2011 Elsevier B.V.
Cheng Z.,Nanjing Southeast University |
Cheng Z.,Taishan College
Ecological Indicators | Year: 2016
Using statistical data from 285 cities in China, this paper studies the spatial correlation and interaction between manufacturing agglomeration and environmental pollution. Using a widely used spatial correlation index, bivariate Moran's I, we first estimate the spatial correlation between manufacturing agglomeration and environmental pollution. We show that there is significant spatial correlation between them, and distinct patterns of local spatial concentration are identified. Then, we use a spatial simultaneous equations (SSE) model to analyze the interaction between manufacturing agglomeration and environmental pollution. We show that manufacturing agglomeration aggravates environmental pollution, while environmental pollution restrains manufacturing agglomeration. In addition, manufacturing agglomeration and environmental pollution in any one city can be affected by manufacturing agglomeration and environmental pollution in surrounding cities through spatial spillover. Finally, we put forward specific suggestions based on the conclusions for more sustainable development. © 2015 Elsevier Ltd.
Ke Z.,Shandong University of Science and Technology |
Yuan Y.,TaiShan College
Open Fuels and Energy Science Journal | Year: 2015
Total quantity control is an important means and measure of protecting the quality of the air and environment. Generally speaking, the existing calculation of the total quantity in environmental control is discussed under assumptions in the closed system. This is largely inconsistent with the practical facts. In this paper, the region is regarded as an open environment system, Datong Economic Development Zone is taken as the background, and the quality control of the air and environment is taken as the objective. Next, the concentration contribution curve and distribution function of the dispersal of air pollution sources are analyzed, the share and proportion of contribution of the interior and exterior pollution sources of the development zone are calculated. An optimization model of the total pollutant discharge is constructed, and the total quantity of pollutant discharged by the development zone is measured, calculated and analyzed. © Ke and Yuan; Licensee Bentham Open.
Sang S.,East China University of Science and Technology |
Sang S.,Taishan College |
Shen D.,Taishan College |
Zhao J.,Taishan College |
And 2 more authors.
Advanced Materials Research | Year: 2011
In this paper, a spherical robot with an internal mechanism for propulsion is briefly introduced. The spherical robot is actuated and steered through a couter-weight pendulum connected to the main axle, a drived motor and a steer motor. A mathematical model of the robot's dynamic and motion is instructed. The 3D model of the robot is built by SOLIDWORKS and then exported to ADAMS for simulation. For a number of missions, it is shown experimentally that the model agrees well with the results. © (2011) Trans Tech Publications Switzerland. © (2011) Trans Tech Publications Switzerland.
Li C.,Shandong University |
Li C.,Taishan College |
Wang Y.,Shandong University
International Journal of Control, Automation and Systems | Year: 2013
This paper investigates the input disturbance suppression problem for nonlinear Port-Controlled Hamiltonian (PCH) system and presents a number of new results on the controllers design via the internal model approach. Different from the existing results on this topic we consider two cases. Firstly, the case of the disturbance generated from a linear Hamiltonian system acts through a channel other than the input channel is studied by adopting a method of decomposing the control into two parts and designing an internal model to zero the effect of the exogenous disturbance. Secondly, the case of the disturbance generated from a bounded nonlinear exosystem is studied by presenting a procedure of designing a nonlinear internal model to cancel the effect of the disturbance under two fundamental assumptions. Moreover, to further improve the suppression, a more effective internal model is also designed under less hypotheses. Finally, as an useful application, a corollary is presented by applying these results on PCH system to general nonlinear affine system. Simulations of a third-order synchronous generator model with disturbance generated from a nonlinear exosystem show the effectiveness of the designed internal model. © 2013 Institute of Control, Robotics and Systems and The Korean Institute of Electrical Engineers and Springer-Verlag Berlin Heidelberg.
Wu H.,East China University of Science and Technology |
Sang S.-J.,East China University of Science and Technology |
Sang S.-J.,Taishan College |
An Q.,East China University of Science and Technology
Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics | Year: 2011
In the past researches about bearing-rotor systems, rolling element bearing was commonly simplified as a non-linear spring-damper with radial stiffness and damping. Such an assumption neglects the influences of bearing geometry structure on the governing equations of a bearing-rotor system and is not so reasonable. In this article, the contact stress and load distribution between roller elements and raceways are analysed using Hertz theory and the calculation method for bending moment on the bearing end faces is established; on this basis a new transfer relationship of state vectors between the two ends of bearing is obtained, and then a new transfer matrix method (TMM) for a rolling element bearing-rotor system is established. A concrete calculation example of a cylindrical roller bearing-rotor system is carried out using the new TMM. With this example, the influences of cylindrical roller bearing structure parameters (roller length, roller radius, and roller number) on a rotor system's vibration characteristics were studied in detail, and the obtained results show that the bearing geometry structure has significant influence on the rotor modal shape and the unbalanced response; such influences were also verified by finite-element method analysis.
Li C.-S.,Shandong University |
Li C.-S.,Taishan College |
Wang Y.-Z.,Shandong University
Zidonghua Xuebao/Acta Automatica Sinica | Year: 2014
This paper investigates the output consensus problem of port-controlled Hamiltonian (PCH) multi-agent systems with both fixed and switching topologies. Firstly, a distributed group output consensus protocol is designed via the energy shaping method to reach globally stability and group output consensus. Secondly, a new distributed control protocol is proposed by using the structural properties of the PCH systems. The advantage of this protocol is that it can transform the directed graph to the undirected graph by constructing a kind of virtual neighbors. Thirdly, a control protocol is designed with the extended LaSalle's invariance principle developed for switched systems under the jointly connected topology condition to make all the agents reach output consensus when the topology is switching. Finally, some illustrative examples with simulations are provided to demonstrate the effectiveness of the protocols designed in this paper. Copyright © 2014 Acta Automatica Sinica. All rights reserved.
Wang X.,Taishan College
Applied Mechanics and Materials | Year: 2014
Now environment basic public service is an important component of basic public service in China. However, there are deficient & unbalanced supply, single mode of supply, backward technology and other problems in environment basic public service. This needs to use scientific and technological innovation to change this situation. The trend of innovation is to use the technology of big data to establish the system of wisdom environment public service. © (2014) Trans Tech Publications, Switzerland.
Yan-xiang G.,Taishan College
Chinese Astronomy and Astrophysics | Year: 2010
Starting from the differential equation of motion of photons on equatorial plane and in spherically symmetric field of gravitation and adopting the post-Newtonian approximate method, the post-post-Newtonian amendments of radar echo delay test in the Reissner-Nordström metric field are investigated. Via calculations the post-Newtionian and post-post-Newtonian amendments are obtained. When the electric charge Q is equal to zero, these results are applicable to electrically neutral celestial bodies, and the amendments of post-Newtonian parts are consistent with those provided by classical literature. The approximate expansion used in this paper can also be adopted to probe the amendments of still higher orders. The high-order amendments for radar echo have important significance to the ongoing high-precision spatial gravitation tests. © 2010.
Jingwei Z.,Taishan College
ICCSE 2011 - 6th International Conference on Computer Science and Education, Final Program and Proceedings | Year: 2011
With the development of computer and network technology, in the E-learning environment, what efforts will learning styles bring to learing result, has raised concerns among researchers. By classifying the learners according to the Kolb's learning style inventory, and then tracing their online realtime interaction, this article analyzed the degree of participation, the depth of interaction and the different learning reults of students who belongs to different learning styles. © 2011 IEEE.