Xinyang Vocational and Technical College

Xinyang, China

Xinyang Vocational and Technical College

Xinyang, China
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Xu S.,Xinyang Vocational and Technical College | Bai L.,Xinyang Vocational and Technical College | Fan M.,CAS Institute of Remote Sensing | Ge Q.,Henan University
Guangxue Xuebao/Acta Optica Sinica | Year: 2017

Based on the diffusion-limited aggregation model, the aggregated soot and its mixture particles with water coating are generated. The aging process of soot aggregates is simulated. The effects of particle morphology and water coating on the optical properties of the two kinds of particles at the wavelength of 550 nm are studied by the cluster T-matrix method. The results show that the difference of optical property parameters between the freshly generated soot aggregate and the spherical soot with the same volume is larger than the difference between the aged soot aggregate and the spherical soot. When the fractal dimension Df is 1.8, the relative differences of scattering cross section and single scattering albedo reach 61.58% and 49.44%, respectively. As the aging process proceeds, the differences decrease. For the mixture particles, ignoring the cluster structure of the soot core can lead to underestimation of the forward scattering intensity, scattering cross section, extinction cross section, single scattering albedo, asymmetry factor, and F34/F11, and overestimation of the backward scattering intensity, absorption cross section, -F12/F11, F33/F11, and F44/F11. With the increase of the water coating thickness, the scattering matrix elements of mixtures are more turbulent with scattering angle, and the relative differences of optical property parameters caused by ignoring the soot core and the aggregated morphology of soot core are both reduced. This study has significance for decreasing the estimation error of radiative forcing estimation due to soot aerosol. © 2017, Chinese Lasers Press. All right reserved.

Zhang Q.,Lanzhou University of Technology | Mei J.,Lanzhou University of Technology | Wang X.,Lanzhou University of Technology | Fan W.,CAS Chengdu Institute of Organic Chemistry | And 3 more authors.
Journal of Alloys and Compounds | Year: 2014

Ultrathin LiMn2O4 was successfully prepared by calcinating at 700 °C following solution combustion synthesis. The effects of NO3 -/CH3COO- ratio of starting materials on the structure and electrochemical performance are investigated. XRD results indicate that LiMn2O4 samples prepared with a NO3 -/CH3COO- ratio of 3:2 (LMO3) has the smallest nanocrystallite of 36.1 nm. SEM results reflect that LMO3 has the smallest average primary particles of 210 nm. These features ensure LMO3 have the excellent electrochemical performance. It even can deliver a capacity of 95.5 mA h g-1 at charge-discharge rate of 10 C. The charge-discharge voltage profiles, dQ/dV versus voltage curves and EIS test all indicate LMO3 has the best electrochemical performance. © 2014 Elsevier B.V. All rights reserved.

Li H.-J.,Kunming University of Science and Technology | Xiong W.-Z.,Xinyang Vocational and Technical College
Kang T'ieh/Iron and Steel | Year: 2016

In iron and steel enterprises, the volume of byproduct gas system fluctuates frequently, the imbalance phenomenon is serious and the byproduct gas balance between supply and demand has enormous influence on the enterprise's production cost and energy consumption. There are various processes and equipment relating to variety of energy medium. Combined the property with support vector machine classification, the HP filter, Elman neural network and least squares support vector machine were applied to establish the SVC-HP-ENN-LSSVM forecasting model, and the optimization operation was made according to the characteristics of the energy-using equipment, energy utilization and the predicted results. The application of the model showed that the predicted average relative error values of byproduct gas were under the 4% which can meet the requirement of industrial production. The forecast results of optimization scheduling solved the imbalance of gas system, and when it was applied to the steel business typical working, about 10% of main process energy consumes was saved. Assuming there are 330 days operation in a year, the self-provided power plant can produce more than 104148 t steam which can save 9998208 kg standard coal. © 2016, CISRI Boyuan Publishing Co., Ltd. All right reserved.

Yang P.,Harbin Institute of Technology | Zhao Y.,Harbin Institute of Technology | Su C.,Xinyang Vocational and Technical College | Yang K.,Harbin Institute of Technology | And 2 more authors.
Electrochimica Acta | Year: 2013

Electrodeposition of Cu-Li alloy from 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIm][BF4]) ionic liquid was investigated. The cyclic voltammetry behaviors of [BMIm][BF4] containing Cu(II), Li(I), and mixtures of Cu(II) and Li(I) were studied at a copper working electrode, separately. The Cu-Li alloy produced by direct current electrodeposition was characterized by inductively coupled plasma atomic emission spectrometry (ICP), X-ray photoelectron spectroscopy (XPS), and scanning electron microscope (SEM). The function of 2-butyne-1,4-diol was studied by linear sweep voltammetry. The result shows that the 2-butyne-1,4-diol could improve Li content in deposit, and make the Cu-Li alloy deposits denser and finer. © 2012 Elsevier Ltd. All rights reserved.

Luo J.H.,Chengdu University of Technology | Luo J.H.,Xinyang vocational and technical college
Applied Mechanics and Materials | Year: 2014

The removal of persistent organic pollutants (POPs) in soils at initial concentrations ranging from 20.00 to 321.05 mg·kg-1 was investigated under different planting patterns, and enhancement mechanisms were analyzed. Results showed that the dissipation of POPs in soils growing Brassica campestris and Medicago sativa significantly exceeded those vegetating single species. During 70-day experiment, about 75.06% of Pyr and 68.22% of BaP was removed from the soils under mixed cropping; while only 31.8% and 64.03% of Pyr and 27.84% and 51.93 of BaP were removed under single rape and alfalfa cropping, respectively. Of all pathways enforcing POPs removal, plant-microbial interactions is the most predominant. These results suggested a feasibility of the establishment of multi-species phytoremediation for improvement of the remediation efficiencies of POPs, which may decrease accumulations of POPs in crops and thus reduce their risks. © (2014) Trans Tech Publications, Switzerland. All Rights Reserved.

Hu R.-R.,Xinyang Vocational and Technical College | Yi H.-Z.,Xinyang Vocational and Technical College
World Chinese Journal of Digestology | Year: 2016

Enhanced recovery after surgery and damage control surgery have been gradually applied to clinical surgery in recent years, aimed to reduce perioperative stress response in surgical patients. Research on the perioperative period of selective surgery proves that enhanced recovery after surgery and damage control surgery play an important role in reducing perioperative stress reaction, especially in patients with acute abdominal pain. This article briefly summarizes the recent progress in understanding the role of enhanced recovery after surgery and damage control surgery in acute abdominal disease. © 2016 Baishideng Publishing Group Inc. All rights reserved.

Zhan N.,Xinyang Vocational and Technical College | Wu L.,China Jiliang University
Procedia Engineering | Year: 2012

The minimum spanning tree problem is a classical and well-known combinatorial optimization problem. There exist many efficient algorithms such as the Kruskal algorithm and Prim algorithm to solve it. But in a real network, the vertices as well as the edges may have weights, and there are many cases of the vertex weights according to the degrees of the vertices. In this paper, we consider the computational complexity of the minimum expense spanning tree problem, which is to find a spanning tree in a network with minimum total expenses. We show that this problem is NP-hard in some general situations. And we propose a polynomial time algorithm when computing all the weights of the vertices in a spanning tree. © 2012 Published by Elsevier Ltd.

Liu X.,Xinyang Normal University | Zhang X.-Y.,Xinyang Vocational and Technical College | Wang L.-L.,Xinyang Normal University | Wang Y.-Y.,Xinyang Normal University
Microchimica Acta | Year: 2014

We describe an electrochemical sensor for paracetamol that is based on a glassy carbon electrode modified with multiwalled carbon nanotubes and dopamine nanospheres functionalized with gold nanoparticles. The functionalized nanospheres were prepared by a chemical route and characterized by scanning electron microscopy. The well-dispersed gold nanoparticles were anchored on the dopamine nanosphere via a chemical reduction of the gold precursor. The stepwise fabrication of the modified electrode and its electrochemical response to paracetamol were evaluated using electrochemical impedance spectroscopy and cyclic voltammetry. The modified electrode displayed improved electrocatalytic activity towards paracetamol, a lower oxidation potential (371 mV), and a larger peak current when compared to a bare electrode or other modified electrodes. The kinetic parameters governing the electro-oxidation of paracetamol were studied, and the analytical conditions were optimized. The peak current was linearly related to the concentration of paracetamol in 0.8-400 μM range, and the detection limit was 50 nM (at an SNR of 3). The method was successfully applied to the determination of paracetamol in spiked human urine samples and gave recoveries between 95.3 and 105.2 %. [Figure not available: see fulltext.] © 2014 Springer-Verlag Wien.

Wang K.,Xinyang Vocational and Technical College | Gan L.,Xinyang Vocational and Technical College
Applied Mechanics and Materials | Year: 2014

This paper design and realize a uplink single hop and multi hop data transmission using the Zigbee technical, and the system can realize the downlink overall and single equipment control network. The Wireless sensor network system is mainly used in data transmission and control. The network is debugged and tested. The final network operation and the test results show that the overall network running in good condition, the design realizes all functions and achieve the desired results. © (2014) Trans Tech Publications, Switzerland.

Lei Z.H.,Xinyang vocational and technical college | Wu Y.X.,Yanshan University
Applied Mechanics and Materials | Year: 2014

Potentials of three plant species, rape, alfalfa and white clover, separately or jointly on the degradation of polycyclic aromatic hydrocarbons (PAHs) in soil were estimated by pots experiments. Results showed the presence of vegetation apparently enhanced the dissipation of PAHs at initial concentrations ranging from 20.05 to 322.06 mg·kg-1. Within 70-day experiment, alfalfa and white clover showed higher efficiencies for removal of PAHs than those of rape, and mixed cropping greatly enhanced the dissipation of PAHs as compared to single cropping. On average 74.87% of phenanthrene or 62.81% of pyrene were removed from soils with mixed cropping of rape and alfalfa, and 72.01% of phenanthren or 68.44% of pyrene removed by mixed cropping of rape and white clover. Results suggested a feasibility of the establishment of multispecies remediation for enforcing the dissipation of PAHs. © (2014) Trans Tech Publications, Switzerland.

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