Al-Rohily K.M.,Industries Development Corporation |
Ghoneim A.M.,King Saud University |
Ghoneim A.M.,Agricultural Research Center |
Modaihsh A.S.,King Saud University |
Mahjoub M.O.,King Saud University
International Journal of Soil Science | Year: 2013
Addition of organic manure could improve the soil physical and chemical conditions. Besides it might also increase the efficiency of added F fertilizers and provide additional sources of nutrients. Information on the availability of B following chemical fertilizer and compost addition to soil may help in better management of B fertilization. The aim of this work was to study the combined effect of various levels and kinds of organic and chemical B fertilizer on B availability in a calcareous soil, through an incubation experiment. Treatments included four rates of added B (20, 40, 80 and 160 mg P2O5 kg-1 soil) and control, one from an inorganic source (KH2PO4 and two from organic sources (Cattle manure and Sludge compost). The soil was incubated at 25°C and was maintained at 80% water holding capacity. Change in the amount of available B was measured during 16 weeks. By increasing the time of incubation, B availability in soil significantly decreased for both organic compost and inorganic fertilizer. It is concluded that the most critical time of incubation is the first week. In this time the soil loses almost 50% of the added B. Inorganic B fertilizer yielded more extractable B compared to the two organic sources only in the first week while the rest of incubation period, the amount of B available from the cattle manure compost was significantly higher. © 2013 Academic Journals Inc.
PubMed | Ewha Womans University, University of South Australia, Indian Institute of Technology Madras, SABIC and Industries Development Corporation
Type: | Journal: Chemical Society reviews | Year: 2016
Mesoporous carbon nitrides (MCNs) with large surface areas and uniform pore diameters are unique semiconducting materials and exhibit highly versatile structural and excellent physicochemical properties, which promote their application in diverse fields such as metal free catalysis, photocatalytic water splitting, energy storage and conversion, gas adsorption, separation, and even sensing. These fascinating MCN materials can be obtained through the polymerization of different aromatic and/or aliphatic carbons and high nitrogen containing molecular precursors via hard and/or soft templating approaches. One of the unique characteristics of these materials is that they exhibit both semiconducting and basic properties, which make them excellent platforms for the photoelectrochemical conversion and sensing of molecules such as CO
Dai M.-X.,Nanjing University of Science and Technology |
Dai M.-X.,Industries Development Corporation |
Yang X.-M.,Nanjing University of Science and Technology |
He Y.,Nanjing University of Science and Technology |
Yi W.-J.,Nanjing University of Science and Technology
Kongzhi yu Juece/Control and Decision | Year: 2016
In order to further improve the accuracy of the pseudospectral optimal control method, and weaken the amplification of approximation errors of state variables in the differential pseudospectral method, the integral pseudospectral optimal control method is studied. The integral pseudospectral discrete forms of three pseudospectral methods are presented, which are Legendre pseudospectral method, Gauss pseudospectral method and Radau pseudospectral method, respectively. When the approximation errors of Lagrange polynomials for state variables are equal to zero, it is proved that the differential and integral forms of Gauss pseudospectral method and Radau pseudospectral method are equivalent, but that of Legendre pseudospectral method is not equivalent, and the reason of nonequivalence is also analyzed. © 2016, Editorial Office of Control and Decision. All right reserved.
Wang G.,Beijing Institute of Technology |
Li P.,Industries Development Corporation |
Zhou J.,Beijing Institute of Technology
International Journal of Computational Intelligence and Applications | Year: 2014
A dual-stage sampling (DSS) is proposed to reduce training samples of artificial neural network for establishing the analytical response surface model. The procedure of the DSS-based artificial neural network response surface (ANNRS) methodology is divided into two stages. At the rough stage, new sample is generated in the entire space by maximizing the minimum distance to existed samples. Then at the refine stage, new sample is produced in the same way, but is limited in the partial space between two samples with larger gradient and larger distance. And the efficiency of the DSS method is proved by a test function. Considering design variables about slot width and depth, permanent magnet (PM) width and height, and end tooth width, tubular permanent-magnet linear synchronous motor (TPMLSM) modeling problem is represented, whose thrust and ripple are calculated time-consumingly by finite element analysis. Then, The DSS-based ANNRS is applied to establish the TPMLSM model in good accuracy with fewer samples, lower consumption. © Imperial College Press.
Shimada H.,Industries Development Corporation |
Shabana A.A.,University of Illinois at Chicago
Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics | Year: 2012
This article is concerned with the numerical and experimental investigations of impact-induced vibrations in highly non-linear complex multibody system applications. In order to accurately model the impact response of such complex systems, a computational procedure based on the integration of finite element and multibody system algorithms is used. This procedure, which employs the finite element floating frame of reference formulation, allows for defining arbitrary joint constraint and forcing functions, for accurately capturing the coupling between the rigid body motion and the elastic deformation, and for modeling the impact forces between rigid and flexible bodies in the multibody system model. The system equations of motion are developed using the augmented Lagrangian formulation that allows for the use of sparse matrix techniques. The algorithm used in this study ensures that the kinematic constraint equations are satisfied at the position, velocity, and acceleration levels. The impact-induced vibration of a highly non-linear press machine is numerically and experimentally examined in this study. In order to accurately model the dynamic behavior of such a press machine, it is necessary to model the transfer feeder elastic deformations resulting from the impulsive impact forces. The deformations of the transfer press system as well as those of its frame are modeled in this investigation using the floating frame of reference formulation that allows for effectively reducing the number of degrees of freedom by filtering out very high-frequency modes of vibration using component mode synthesis techniques. The formulations of several relative angle and angular velocity kinematic constraints that are required to model this multibody system are developed in order to model transfer feeder complex rotational components. The numerical results obtained using the three-dimensional multibody system transfer press model developed in this study are validated using experimental results. © Authors 2011.
Zhao Y.,Industries Development Corporation |
Chen C.,Nanjing University of Science and Technology |
Ma W.,Nanjing University of Science and Technology |
Zhu Z.,Nanjing University of Science and Technology
Nanjing Li Gong Daxue Xuebao/Journal of Nanjing University of Science and Technology | Year: 2015
This paper presents a microstrip patch antenna with reconfigurable frequency and pattern to meet the needs of wireless communication system miniaturization and antenna multifunction. The configuration consists of a radiation patch with an U-shaped slot and two symmetrical parasitic patches. The reconfigurations of frequency and pattern can be achieved by changing the operating states of the PIN diode on the U-shaped slot and parasitic patches. Simulation and test results show that the antenna resonates at 5.2 GHz or 5.8 GHz, at the same time, the beam deflection and broadening can be achieved at both of the resonant frequencies. The reconfigurable frequencies and radiation patterns can be achieved by adopting the structure of a microstrip antenna, and the characteristic of multifunction is realized. ©, 2015, Nanjing University of Science and Technology. All right reserved.
Mei Y.,Beijing Institute of Technology |
Yu J.,Beijing Institute of Technology |
Chen X.,Industries Development Corporation
Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering | Year: 2011
It is of important practical value to track moving objects in the fields of industrial process control, medical research, imaging guidance, etc. At present most research in this field are often based on static background, while those based on moving background are rather less. A complete algorithm of object tracking in the moving background was proposed. Firstly, the background of sequence images were registered by using the mutual information. Secondly, a differential method was used to detect moving object in combination with image segmentation technology to get the object template. Object tracking was based on Kalman filter and the object matching was still based on the mutual information theory. The experiments show that object tracking is rapid, accurate and robust by using this algorithm. Computational efficiency and accuracy of this new tracking algorithm is so high, and its application prospect will be broad.
Industries Development Corporation | Date: 2010-10-01
Industries Development Corporation | Date: 2014-01-07