Engineering Design and Research Institute of the Second Artillery Corps

Beijing, China

Engineering Design and Research Institute of the Second Artillery Corps

Beijing, China

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Wu H.X.,PLA University of Science and Technology | Wu H.X.,Engineering Design and Research Institute of the Second Artillery Corps | Li L.,PLA University of Science and Technology | Shi C.C.,PLA University of Science and Technology | Chen Y.H.,PLA University of Science and Technology
Applied Mechanics and Materials | Year: 2013

In the construction of high-rise buildings, the effect produced by the excavation of deep and large foundition pits on the surrounding structures cannot be ignored. This paper presents a case study from a construction project located in Nanjing, in which the dynamic excavation process of a founditon pits is numerically analyzed with finite element method on Plaxis. The impact of various excavation stage on subway tunnel nearby is achieved in terms of the results of data analyses and assessments. © (2013) Trans Tech Publications, Switzerland.


Wu H.X.,PLA University of Science and Technology | Wu H.X.,Engineering Design and Research Institute of the Second Artillery Corps | Yue S.L.,PLA University of Science and Technology | Shi C.C.,PLA University of Science and Technology | And 2 more authors.
Applied Mechanics and Materials | Year: 2013

In the deep rock mass surrounding, rock burst, large deformation, zonal fracturing and phenomena like these may occur in the tunnel excavation process. When zonal fracturing happens, it is essential to reconsider the types of support, the boundary of support and the approach of tunnel excavation. In this paper, the control theory about the surrounding rock stability under high pre-existing stresses was researched, and the efficient support form which was the combination of high strength anchor bar and anchor cable was ascertained to be adaptive to deep tunnel excavation. According to the deformation and zonal fracturing mechanism of the surrounding rock, a comprehensive support program that combined intensive short anchor bars and long anchor cables was established, and the numerical simulation was carried out to verify the feasibility of the support form. © (2013) Trans Tech Publications, Switzerland.


Yang R.,Engineering Design and Research Institute of the Second Artillery Corps | Liu J.-H.,Beihang University | Li S.-M.,Beihang University
International Journal of Minerals, Metallurgy and Materials | Year: 2011

In-site regenerated titanium dioxide-activated carbon fibers (TiO 2-ACFs) photocatalyst was prepared by the sol-gel method. Detailed surface and structural characterization of the TiO2-ACFs photocatalyst was carried out. The photoactivity of TiO2-ACFs under ultraviolet irradiation was compared with original ACFs and pure TiO2 by the degradation of methylene blue aqueous solution. The degradation efficiency by the TiO2 (5wt%)-ACFs sample is much higher than that by TiO2 and ACFs. The results show that the photocatalysis by TiO 2-ACFs is a six-step process. The adsorption-transfer-photocatalysis rate of TiO2-ACFs is higher than the adsorption-photocatalysis rate of TiO2, so the photocatalysis rate of the TiO2-ACFs system is higher than that of TiO2 photocatalyst. © University of Science and Technology Beijing and Springer-Verlag Berlin Heidelberg 2011.


Han Y.,Beihang University | Li X.,Beihang University | Zhu T.,Beihang University | Lv D.,Beihang University | And 4 more authors.
Aerosol and Air Quality Research | Year: 2016

In order to understand the characteristics and relationships between indoor and outdoor PM2.5 during the heating period of 2014 in Beijing, the investigation of PM2.5 and associated species including organic and elemental carbon (OC/EC), water soluble ions, metal elements and trace organic matter (OM) were undertaken at a residential apartment. The average PM2.5 concentration was 55.2 ± 47.3 µg m–3 for indoor and 100.4 ± 82.1 µg m–3 for outdoor, and the indoor PM2.5 was found to be mainly from outdoors. OM and (NH4)2SO4 were the dominated components of PM2.5, accounted for 71.5% in indoor PM2.5 and 52.4% in outdoor PM2.5, followed by fine soil and NH4NO3 (23.7% and 27.9%). The polycyclic aromatic hydrocarbons (PAHs) concentration was 187.3 ng m–3 and 387.0 ng m–3, and the phthalic acid esters (PAEs) concentration reached 1054.2 ng m–3 and 515.3 ng m–3, for indoor and outdoor, respectively. Hexachlorobenzene (HCB) only existed indoors (5.5 ng m–3). HCB and most PAEs in indoor PM2.5 were dominated by indoor sources whereas other species were greatly influenced by outdoor sources especially during the pollution period. © Taiwan Association for Aerosol Research.


Yang W.,Nankai University | Song Y.,Engineering Design and Research Institute of the Second Artillery Corps | Zhao X.,Nankai University
Xitong Fangzhen Xuebao / Journal of System Simulation | Year: 2015

A virtual reality platform for space simulation was developed to simplify the implementation of weapon and based design. First, the architecture of the simulation system was described briefly; Second, based on the characteristics of space simulation platform, several key modules were introduced, including terrain real-time generation, analysis of space layout, and closest distance calculation. The terrain generation for space simulation platform was based on database management. The closest distance calculation was based on nearest neighbor k-d tree searching. In addition, a three-dimensional (3-D) model library, containing vehicles, test equipment, plant facilities, and other tools, was established for dynamic loading and planning. The simulation results show that the virtual reality system is robust, efficient, and realistic, which can meet the requirement of real time simulation of space planning and designing. © 2015, The Editorial Board of Journal of System Simulation. All right reserved.


Fei Y.,Engineering Design and Research Institute of the Second Artillery Corps | Song Y.,Engineering Design and Research Institute of the Second Artillery Corps | Sun G.,Nankai University
2015 IEEE International Conference on Cyber Technology in Automation, Control and Intelligent Systems, IEEE-CYBER 2015 | Year: 2015

A simulation system for real-time closest distance searching is developed using GPU-based massive parallel computation technology. The system can be used for minimum distance detection between two three-dimensional (3-D) objects in a virtual environment. First, two 3-D models are converted into vertex/mesh format; then, CUDA-based GPU parallel computation is performed for the nearest neighbor searching, in order to find the closest separation Euler-distance of two objects; at last, Unity3D game engine is used as a testing platform for visualization. Experimental results indicate that the system not only works for arbitrary complex objects (i.e., non-convex object), but also has good real-time capability and high accuracy. Compared with traditional brute force algorithm, our parallel searching is about 50 times faster. © 2015 IEEE.


Zhang Y.,Nankai University | Fei Y.,Engineering Design and Research Institute of the Second Artillery Corps | Xu L.,Nankai University | Sun G.,Nankai University
Chinese Control Conference, CCC | Year: 2015

This paper presents the development of a low cost wireless real-time inertial body tracking system for virtual training. The system is designed to provide highly accurate human body motion capture and interactive three-dimensional (3-D) avatar steering, by combining low cost MEMS inertial measurement units (IMUs), wireless body sensor network (BSN), and Unity 3D virtual reality game engine. First, several wearable MEMS IMU sensors are placed on user's body and limbs according to human skeletal action, and each sensor performs a 9 degrees of freedom (DOF) tracking at a high-speed update rate. Second, a Zigbee-based BSN is designed to support up to 20 MEMS IMU sensor nodes data transmission at 50 Hz sampling frequency. All collected sensors' data are loaded to a Matlab-based PC program by means of serial port. In order to accurately estimate the local orientation of each IMU sensor, an optimized gradient descent algorithm is implemented. The algorithm uses a quaternion representation, which allows accelerometer and magnetometer data to be fused to compute the gyroscope measurement error as a quaternion derivative. Finally, the estimated orientation data by fusion algorithm are imported to a virtual environment, consisting of the 3-D virtual skeletal representation and the virtual scene for specific training. Experimental results indicate that the system achieves < 1 static RMS error and <2 dynamic RMS error. The systems further expand the usability of low cost body tracking solution to virtual training in virtual environments. © 2015 Technical Committee on Control Theory, Chinese Association of Automation.


Li Y.-H.,Engineering Design and Research Institute of The Second Artillery Corps | Tan K.-K.,Engineering Design and Research Institute of The Second Artillery Corps | Feng L.,Engineering Design and Research Institute of The Second Artillery Corps
Yantu Lixue/Rock and Soil Mechanics | Year: 2012

Core disking is one of indicators of elevated geostress magnitude. The shape of disked cores is directly subjected to values and directions of three principal stresses. In the case of drilling-induced core disking, 3D geostress states cannot be measured by usual overcoring methods. Based on the previous studies of core disking, we provide a convenient substituted measurement of 3D geostresses by determining the geometry of disked core's surface. Practically, the directions of three principal stresses from our method are quite close to those from other measurement in the vicinal site. The differences of inclination are in the range of 10°; and those of azimuth less than 20°. Moreover, the magnitudes of principal stresses satisfy the well-known condition to cause core disking.


Song Y.-H.,Engineering Design and Research Institute of the Second Artillery Corps | Fei Y.-F.,Engineering Design and Research Institute of the Second Artillery Corps | Sun G.-Y.,Nankai University | Zhao X.,Nankai University
Xitong Fangzhen Xuebao / Journal of System Simulation | Year: 2014

A three-dimensional (3-D) MEMS simulation system was developed by using voxel-based graphics, volume rendering, and immersive stereoscopic display. 3-D mathematical morphology operation was used to model the fabrication processes of MEMS; Volume rendering was used to reconstruct the 3-D simulated results; Stereoscopic display was used to visualize the 3-D scene by a Sony HMZ T3 head mounted display. In addition, a custom-made Micro Inertial Measurement Unit (Micro-IMU)-based head tracker enabled the users to operate the 3-D scene, interactively.


Fei Y.,Engineering Design and Research Institute of the Second Artillery Corps | Song Y.,Engineering Design and Research Institute of the Second Artillery Corps | Xu L.,Nankai University | Sun G.,Nankai University
Chinese Control Conference, CCC | Year: 2014

This paper introduces the new design of a Micro Inertial Measurement Unit (μ-IMU)-based sensor mote for wireless body sensor network (BSN). The μ-IMU unit consists of a three-axis accelerometer, a three-axis gyroscope MPU6050, and a three-axis electronic compass AK8975. The MCU uses a CC2530 which integrates an 8051 core and 2.4GHz RF. The hardware design and Z-Stack-based software architecture of the sensor mote are discussed in details. A MATLAB program is used to collect experimental data for verification. This system shows several advantages in high integration, compact volume, and accurate sensing capability, which is critical for wearable inertial measurement and body capture. © 2014 TCCT, CAA.

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