Longyan College

Longyan, China

Longyan College

Longyan, China
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Wang Q.,Beijing Normal University | Wu L.,China University of Mining and Technology | Chen S.,Longyan College | Shu D.,Zijin MiningGroup Co. | And 3 more authors.
International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives | Year: 2014

This study investigates the usability of low-attitude unmanned aerial vehicle (UAV) acquiring high resolution images for the geometry reconstruction of opencast mine. Image modelling techniques like Structure from Motion (SfM) and Patch-based Multi-view Stereo (PMVS) algorithms are used to generate dense 3D point cloud from UAV collections. Then, precision of 3D point cloud will be first evaluated based on Real-time Kinematic (RTK) ground control points (GCPs) at point level. The experimental result shows that the mean square error of the UAV point cloud is 0.1 1m. Digital surface model (DSM) of the study area is generated from UAV point cloud, and compared with that from the Terrestrial Laser Scanner (TLS) data for further comparison at the surface level. Discrepancy map of 3D distances based on DSMs shows that most deviation is less than ±0.4m and the relative error of the volume is 1.55%.

Zhu L.-H.,Shandong University of Science and Technology | Lin M.,Shandong University of Science and Technology | Tang Y.-J.,Shandong University of Science and Technology | Huang R.-H.,Shandong University of Science and Technology | And 2 more authors.
Gongneng Cailiao/Journal of Functional Materials | Year: 2010

Effects of the proportion of formaldehyde to urea, condensation polymerization temperature and time, condensation polymerization pH, as well as the addition of modifiers on free formaldehyde content of urea formaldehyde (UF) resin adhesive, which was prepared using urea and formaldehyde as the main materials, were studied. The optimal conditions to produce the adhesive with a free formaldehyde content of 0.25% were obtained on the premise of the bonding strength of the adhesive.

Zhu L.-H.,Shandong University of Science and Technology | Zhang C.-W.,Shandong University of Science and Technology | Tang Y.-J.,Shandong University of Science and Technology | Huang R.-H.,Shandong University of Science and Technology | And 2 more authors.
Gongneng Cailiao/Journal of Functional Materials | Year: 2010

Effects of the condensation temperature and time, condensation pH, and the addition of modifiers on free formaldehyde content of the polyvinyl formal (PVF) adhesive were studied, and the optimal conditions to produce the environmental protection PVF adhesive with a free formaldehyde content of 0.26% were obtained on the premise of the bonding strength of the adhesive.

Zhu L.-H.,Shandong University of Science and Technology | Zhang L.-L.,Shandong University of Science and Technology | Tang Y.-J.,Shandong University of Science and Technology | Ding M.-T.,Longyan College | Ding M.-T.,Xiamen University
Gongneng Cailiao/Journal of Functional Materials | Year: 2012

Montmorillonite/sodium alginate graft poly (acrylic acid) superabsorbent composite was prepared by intercalation polymerization of sodium alginate (SA), acrylic (AA) and montmorillonite (MMT) using ammonium persulfate (APS) as an initiator and N, N'-methylenebisacrylamide (MBA) as a cross linker. The super-absorbent composite was characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). Sorption behavior of heavy metal ions on MMT/SA-g-PAA was investigated. Maximal amount of adsorption for Pb 2+, Cu 2+ and Ni 2+ was 968.9, 231.0 and 236.0 mg/g, respectively, and the adsorption of Pb 2+ and Cu 2+ was in accordance with Langmuir model, while that of Ni 2+ was in accordance with Freundlich model.

Yang J.,Xiamen University | Chen W.,Xiamen University | Fu Z.,Longyan College | Wu W.,Xiamen University | Xie Z.,Xiamen University
International Journal on Smart Sensing and Intelligent Systems | Year: 2014

This paper studies some key technology of multifunctional sensor signal reconstruction. The multifunctional sensor signal reconstruction problem, presented a multifunctional sensor signal reconstruction method based on B spline and the extended Calman filter. The method of inverse model of the process was studied, gives a method to estimate signal reconstruction accuracy and computation. Genetic algorithm is proposed to balance the multifunctional sensor signal reconstruction accuracy and computation based on. In order to further reduce the sampling effort of large quantities of multifunctional sensor signal reconstruction, is proposed based on the reduction method clustering multifunctional sensor sample selection method, to select the reasonable distribution, suitable for inverse training data model. A new direction to study the theory of multi sensor information fusion is to design and analysis more efficient processing of multi sensor intelligent system is proposed and developed. With the continuous improvement of the intelligent system requirements, research on information fusion of multi-sensor system is affected by the people more and more attention.

Xu F.-M.,Longyan College | Huang W.-H.,China University of Geosciences | Wu C.-S.,Longyan College | Guo Y.-S.,Longyan College | And 2 more authors.
Meitan Xuebao/Journal of the China Coal Society | Year: 2010

The main-exploited No.39 coal seam in Tongziyan Formation Permian in Dingfengshan mining area of Longyong Coalfield was studied in the aspects of coal petrology, sedimentology, fossil plants and dynamic condition of aqueous medium in swamps, etc., used the combined methods of coal petrology and sedimentary geochemistry. The result shows that the coal facies in No.39 coal seam have four types, namely, the noncontributing swamp facies, barrier island-lagoon marsh facies, strongly and weakly overlying-water forest swamp facies. The main body is the overlying-water forest swamp facies that is dominant in the swamp evolution. The variance of the overlying-water depth in the swamps can induce the relevant changes of coal facies assemblages and cycle structures. From the bottom to the top, the coal beds are composed of the assemblages of shallow overlying-water forest swamp facies, strong one, and then shallow one, etc. They have obvious rhyme. Meanwhile, the aqueous dynamic condition in swamps undergoes the weak-strong-weak evolution. The swamp flow possesses the features of stubborn-active-stubborn periodic changes. Overall, the aqueous medium in peat swamp is in weak-strong reduction environment. In the formation of this coal bed, it has the influences from two aspects, the sea and the land. The development of peat swamps appear wavy change. It leads to the jumping evolution of the types of peat swamps. Therefore, a set of coal-forming swamp environment within continental oceanic interaction is formed. It shows the depositional features of barrier island-lagoon system.

Yu Y.,LongYan College | Tu F.-Z.,LongYan College | Zhang X.-H.,LongYan College | Ding M.-T.,LongYan College
Gongneng Cailiao/Journal of Functional Materials | Year: 2010

A series of p-N, N-dimethylaminobenzaldehyde thiosemicarbazone molecules has been synthesized and characterized by elemental analysis, 1H NMR, and MS . Their solid fluorescence was determined and studied with respect to their solid fluorescence properties and their crystal structures. The study show that with the poor packing of π-π interaction results in its monomer emission.

Zhang X.-H.,Longyan College | Zhang R.-P.,Longyan College | He L.-F.,Longyan College | Huang L.-L.,Longyan College | Huang J.-F.,Longyan College
Yejin Fenxi/Metallurgical Analysis | Year: 2010

A new reagent 2-[(p-phenylazobenze)-triazen] benzoic acid(PABTB) has been synthesized and used as a sensitive reagent for the spectrophotometric determination of Sb(III). Anthranilic acid was dizotized to form a dizonium salt which had a coupling reaction with 4-amino-phenyl azobenzene. The product was confirmed as the object reagent by element analysis and IR spectrum after it was purified and recrystallized. In the presence of CTMAB, the reagent reacted with Sb(III)to form a red complex(1:2) in the buffer solution of Na2B4O7-NaOH at pH 10.18. The apparent molar absorptivity was 1.686 × 105 L · mol-1 · cm-1. Beer's law was obeyed in the range of 0-0.7 mg/L for Sb(III). The reagent had been successfully applied to the determination of micro Sb(III) in ore samples.

Tang Q.,Longyan College | Yang Y.,Longyan College
ICIC Express Letters | Year: 2015

It is straightforward to combine iterative learning control (ILC) and high- gain adaptive control into new control strategies due to their commonalities of the requirements of control system, i.e., the structural information, and the feedback high-gain adaptive term is hopefully to improve the robustness of the whole control system. Nevertheless, the high-gain property associated with high overshoots, and the non-robustness of some high-gain adaptive control methods, such as the Naussbaum type ones, pose challenges for the performance improvement of high-gain adaptive ILC methods. Therefore, in this paper, three types of robust high-gain universal adaptive stabilizers (UAS) are added to the PD-type ILC scheme, which can simultaneously improve the robustness and convergence speed of the whole control system to a great extend. The window function based and the bang-bang type high gain adaptive ILC schemes are proposed, and the implementations of the above strategies are discussed to extend their applications. Some detailed designing techniques with better performances are shown in the illustrated examples and concluding remarks, which are provided to validate the above concepts. © 2015 ICIC International.

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