The Concept of Postmodernism in the Philosophy of Constructive Postmodernism

A scientific grasp of the concept of “post-modern” is a logical prerequisite for understanding the latest development of western philosophy, but so far there is no unified definition of “post-modern”. Therefore, clarify the reason for the tension of the “post-modern” concept and its essential connotation is not only related to the development of philosophy itself, but also has very important practical significance for China that is completing modernization. Reconstructive post-modernism philosophy as the latest development form of post-modernism philosophy, the independent opinions on the concept of “postmodern” contained therein help us to better grasp the essence of the concept of “postmodern”

A Leap From the Modern Thinking Way to the Post - Modern Mode of Thinking: On the Thinking of a Constructive Post - Modernism Philosophy

Philosophy as an ideological exploratory activity, its real value is not only to explain the world, but also to provide a scientific way of thinking for human beings, so as to guide human beings to change the world in reality. Constructive post-modernism philosophy, as the latest philosophical trend of thought in the modern West, provides us with a new way of thinking to understand and change the world. Therefore, it is necessary to study the constructive post-modernism philosophy from the point of view of the mode of thinking. Clarify its unique contribution, important position and main content on the mode of thinking. Only in this way can the constructive post-modernist philosophy be liberated from the philosophers study and classroom, and truly become the mode of thinking of the broad masses, that is, the practice subject

A new on-line diagnosis method for inter-turn short circuit of hydro-generator rotor windings using a flexible equivalent coil

The inter-turn short-circuit(ITSC) fault of hydrogenerator rotor windings will lead to the asymmetry of the main magnetic field, which may cause strong vibration and result in a shutdown accident. Inspired by the existence of large number of cross-core screws in hydro-generators, two screws with fractional or integral multiples of generator polar distance are selected and used to form an equivalent coil, so as to construct a semiintrusive fault detection sensor layout scheme. The theoretical analysis of our method was conducted and real time ITSC fault detection according to specific harmonics in the induced voltage in the equivalent coil was proved to be feasible. Finally, through the finite element simulation and fault simulation test, it is shown that when the ITSC of hydro-generator rotor winding occurs, the fractional harmonics appear in the induced voltage of the equivalent coil, which proves the effectivity of our method in determining the ITSC fault. The signal acquisition by using our method is convenient. Besides, the coil pitch is flexible, which is beneficial for both signal acquisition and feature highlightin

PuzzleFlex: kinematic motion of chains with loose joints

This paper presents a method of computing free motions of a planar assembly of rigid bodies connected by loose joints. Joints are modeled using local distance constraints, which are then linearized with respect to configuration space velocities, yielding a linear programming formulation that allows analysis of systems with thousands of rigid bodies. Potential applications include analysis of collections of modular robots, structural stability perturbation analysis, tolerance analysis for mechanical systems, and formation control of mobile robots.Comment: Accepted at the 2020 IEEE International Conference on Robotics and Automation (ICRA

Grouting Effect Detection within the Floor of a Coal Seam Using 3D Electric Resistivity Tomography (ERT) with Arbitrary Electrode Positions

To prevent the occurrence of water inrush from the working face floor, explorations of water-rich floors are necessary. For a working face with a regular shape, a water-rich floor can be detected by laying electrodes and cables around the working face. However, the rectangular working face develops an irregular shape, and the exploration of water in irregular working faces is a difficulty in the study of 3D electric resistivity tomography (ERT). In this paper, an unconventional dipole–dipole array is used for data acquisition and the potential of a non-grid point electrode is replaced by the potential of the surrounding electrode, which identifies a water-rich floor using 3D ERT with arbitrary electrode positions. Taking the 8826 irregular working face of the Baizhuang coal mine as an example, the working face is explored by 3D ERT, the anomalous area is delineated, and targeted grouting is carried out in the anomalous area. After grouting, the grouting effect is detected by 3D ERT, and the safe mining of the working face is ensured. The results show that grouting effect detection within the floor of a coal seam using 3D electric resistivity tomography (ERT) with arbitrary electrode positions could be applied to solving the problem of water-rich exploration of floors in irregular working faces

Grouting Effect Detection within the Floor of a Coal Seam Using 3D Electric Resistivity Tomography (ERT) with Arbitrary Electrode Positions

To prevent the occurrence of water inrush from the working face floor, explorations of water-rich floors are necessary. For a working face with a regular shape, a water-rich floor can be detected by laying electrodes and cables around the working face. However, the rectangular working face develops an irregular shape, and the exploration of water in irregular working faces is a difficulty in the study of 3D electric resistivity tomography (ERT). In this paper, an unconventional dipole–dipole array is used for data acquisition and the potential of a non-grid point electrode is replaced by the potential of the surrounding electrode, which identifies a water-rich floor using 3D ERT with arbitrary electrode positions. Taking the 8826 irregular working face of the Baizhuang coal mine as an example, the working face is explored by 3D ERT, the anomalous area is delineated, and targeted grouting is carried out in the anomalous area. After grouting, the grouting effect is detected by 3D ERT, and the safe mining of the working face is ensured. The results show that grouting effect detection within the floor of a coal seam using 3D electric resistivity tomography (ERT) with arbitrary electrode positions could be applied to solving the problem of water-rich exploration of floors in irregular working faces

Research and application of forward modeling of direct current quadrupole device in advance detection

In order to study the feasibility of mine DC quadrupole device in advance detection of tunneling roadway, a 3D geoelectric model of roadway advance detection is established, and ANSYS is used to simulate quadrupole device for data acquisition; the ratio method is used to eliminate the influence of interference factors such as roadway and device, and the collected data without the influence of roadway is compared with the collected data; three full space geoelectric models are established to study the response of quadrupole device to different abnormal body positions, and the response characteristics of quadrupole device to low resistance abnormal body are obtained; the practicability of this method is illustrated by an engineering example. The research results show that the ratio method can eliminate the influence of the roadway on the abnormal body, and realize the advance detection of the roadway with the quadrupole device. It is feasible to use the quadrupole device to collect data in the advance detection of the roadway

Identifying Terrestrial Landscape Character Types in China

Landscape character assessment (LCA) is a widely used tool that integrates natural, cultural, and perceptual attributes to identify and portray landscape. In this study, we used the LCA method to identify the landscape characteristics of China at the national scale. Furthermore, we applied cultural and landscape structural factors along with spatial transmission to improve the identification system. First, we incorporated all the parameters in the assessment. We selected 15 landscape character factors from four factor types including nature, culture, spatial geographic co-ordinates, and landscape structure. These parameters were analysed using multilevel overlay and spatial connection tools in ArcGis 10.2, which resulted in 2307 landscape description units (LDUs). Second, the spatial structure properties of the LDUs were determined using a semivariogram and the moving window method in ArcGis 10.2 and Fragstats 4.2 software, respectively. Third, for visualisation, we applied the principal component analysis (PCA) using the SPSS software and elbow and k-means clustering methods using MATLAB to determine 110 landscape character types (LCTs) of China’s entire terrestrial landscape. Finally, we determined 1483 landscape character areas through semiautomatic segmentation and manual visual correction using eCognition. Based on the unique characteristics of the entire terrestrial landscape of China, a set of ideas and methods for the overall identification of LCTs was proposed. Our findings can be used to optimise territorial spatial planning and landscape protection and management, and promote multiscale land-use studies in China