Science in China Series E: Technological Sciences

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Design and experimental study of the SPKM165, a five-axis serial-parallel kinematic milling machine
Science in China Series E: Technological Sciences - Tập 54 - Trang 1193-1205 - 2011
FuGui Xie, XinJun Liu, Hui Zhang, JinSong Wang
A five-axis serial-parallel kinematic milling machine, the SPKM 165, is introduced. This machine consists of a three-degree-of-freedom parallel module and a two-degree-of-freedom serial table. The SPKM 165 is capable of five-face machining. A discussion of the inverse kinematics of the five-axis control is provided. A dimensional synthesis procedure is presented in terms of motion/force transmissi...... hiện toàn bộ
Monte Carlo simulations of dense gas flow and heat transfer in micro- and nano-channels
Science in China Series E: Technological Sciences - - 2005
Moran Wang, Zhixin Li
Anisotropic plastic deformation behavior of as-extruded ZK60 magnesium alloy at room temperature
Science in China Series E: Technological Sciences - Tập 52 - Trang 161-165 - 2009
JinBao Lin, LiMing Peng, QuDong Wang, J. R. Hans, WenJiang Ding
The anisotropic plastic deformation behavior of as-extruded ZK60 magnesium alloy at room temperature (RT) was investigated by compressive and tensile testing in different directions, i.e. the loading axis oriented at 0°, 45° and 90° to the extrusion direction. The relationship between texture and plastic deformation behavior were examined. The results show that the extruded ZK60 alloy exhibits a s...... hiện toàn bộ
Recent progress in thermodynamics of radiation—exergy of radiation, effective temperature of photon and entropy constant of photon
Science in China Series E: Technological Sciences - Tập 51 - Trang 1096-1109 - 2008
ZeShao Chen, SongPing Mo, Peng Hu
The recent progress on thermodynamic properties of spectral radiant energy in the field of thermodynamics of radiation is reviewed. The effective temperature of photon T λ representing the energy quality of photon is introduced. The relation between T λ and the wavelength λ is gi...... hiện toàn bộ
Analysis of the constraint relation between ground and self-adaptive mobile mechanism of a transformable wheel-track robot
Science in China Series E: Technological Sciences - Tập 54 - Trang 610-624 - 2011
ZhiQing Li, ShuGen Ma, Bin Li, MingHui Wang, YueChao Wang
To maneuver in unstructured terrains where the ground might be soft, hard, flat or rough, a transformable wheel-track robot (NEZA-I) with a self-adaptive mobile mechanism is proposed and developed. The robot consists of a control system unit, two symmetric transformable wheel-track (TWT) units, and a rear-wheel unit. The TWT unit is the main mobile mechanism for the NEZA-I robot, with the rear-whe...... hiện toàn bộ
The electric properties and the current-controlled differential negative resistance of cBN crystal
Science in China Series E: Technological Sciences - Tập 51 - Trang 2305-2310 - 2008
QingPing Dou, HaiTao Ma
The electric properties of nonintentionally doped n-cubic boron nitride (cBN) crystal are investigated. The cBN crystal was transformed from hexagonal-boron nitride (h-BN) under high pressure (HP) and high temperature (HT) using magnesium powder as catalyst. At room temperature, the current-voltage (I-V) characteristics of cBN crystal are measured and found to be nonlinear. When the electric field...... hiện toàn bộ
A theoretical study of asymptotic boundary conditions for the numerical solutions of open-boundary static electromagnetic-field problems
Science in China Series E: Technological Sciences - Tập 45 - Trang 541-551 - 2002
Xikui Ma, Shejiao Han
Based on the multipole expansion theory of the potential, a satisfactory interpretation is put forward of the exact nature of the approximations of asymptotic boundary condition (called the ABC) techniques for the numerical solutions of open-boundary static electromagnetic-field problems, and a definite physical meaning is bestowed on ABC, which provide a powerful theoretical background for laying...... hiện toàn bộ
Online recognition of the multiphase flow regime
Science in China Series E: Technological Sciences - - 2008
Bofeng Bai, Shaojun Zhang, Liang Zhao, Ximin Zhang, Liejin Guo
Characters of surface deformation and surface wave in thermal capillary convection
Science in China Series E: Technological Sciences - Tập 49 - Trang 601-610 - 2006
Li Duan, Qi Kang, Wenrei Hu
In the field of fluid mechanics, free surface phenomena is one of the most important physical processes. In the present research work, the surface deformation and surface wave caused by temperature difference of sidewalls in a rectangular cavity have been investigated. The horizontal cross-section of the container is 52 mm×42 mm, and there is a silicon oil layer of height 3.5 mm in the experimenta...... hiện toàn bộ
EMDS 3.0: A modeling framework for coping with complexity in environmental assessment and planning
Science in China Series E: Technological Sciences - Tập 49 - Trang 63-75 - 2006
Keith M. Reynolds
The Ecosystem Management Decision Support (EMDS) system is an application framework for knowledge-based decision support of ecological assessments at any geographic scale. The system integrates state-of-the-art geographic information system (GIS) as well as knowledge-based reasoning and decision modeling technologies to provide decision support for a substantial portion of the adaptive management ...... hiện toàn bộ
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