Fang S.,Nanjing Forestry University |
Zhai X.,Nanjing Forestry University |
Zhai X.,Jiangxi Environmental Engineering Vocational College |
Wan J.,Nanjing Forestry University |
And 2 more authors.
Biomass and Bioenergy | Year: 2013
Bioenergy from plants could make a substantial contribution to alleviation of global problems in climate change and energy security. The rapid growth rates of hybrid poplar (Populus spp.) exhibit a great potential for biofuels and selecting superior clones is critical to increase biomass production and ecological effects. Variation in growth, chemistry and calorific value of the 25 poplar clones were examined at nursery stage. The significant clonal differences in growth, leaf traits, wood basic density, chemical compositions and calorific values were observed among the 25 clones. Total leaf area per plant varied along a two-fold range (7146.7-18065.0cm2), mean single leaf area varied between 273.4 and 496.9cm2 and specific leaf area ranged from 158.7 to 204.9cm2g-1. After one growing season, the mean stem biomass production per plant ranged from 173.5g to 485.8g, while the average wood basic density varied from 224 kgm-3 to 310kgm-3 among the tested clones. Mean gross calorific value of the stem on an oven-dry weight basis was within the range of 18.5-19.1kJg-1, while mean ash free calorific value varied between 18.7 and 19.3kJg-1. All the chemical compositions measured both in stem wood and stem bark also presented a broad variation and clonal effects. Based on a comparison of component score coefficients, twenty-five hybrid clones were classified into four distinct groups by means of hierarchical cluster analysis, and clones 208, 328 and 75 showed excellent growth and combustion traits. Clones for further long-term trials in large-scale were also recommended to reduce loss of superior genetic material and risks of maladaptation. © 2012 Elsevier Ltd.
Chen C.,Jiangxi Agricultural University |
Xia Q.-W.,Jiangxi Agricultural University |
Chen Y.-S.,Jiangxi Environmental Engineering Vocational College |
Xiao H.-J.,Jiangxi Agricultural University |
And 3 more authors.
Journal of Insect Physiology | Year: 2012
Pupae of the cotton bollworm, Helicoverpa armigera display a diapause in response to the exposure of their larvae to short photoperiods and relatively low temperatures. Due to geographic variation in photoperiodic response, moths from a northern population, Langfang (39°32'N, 116°41'E), enter diapause in response to short daylengths (D strain) while moths from a southern population, Ledong (18°28'N, 108°53'E), exhibit no diapause under the same conditions (N strain). In the present study, crosses between the two strains are utilized to evaluate the inheritance of diapause under different photoperiods at temperatures 20, 22 and 25°C. The moths in both reciprocal crosses and backcrosses to D strain showed a clear long-day response, similar to that of the D strain, suggesting that the photoperiodic response controlling diapause in this moth is heritable. The incidences of diapause for all F1 hybrids were intermediate between those of their parents. However, the incidences of diapause at 20°C in F1 (N×D) strain were significantly higher than those in F1 (D×N) strain, indicating that the male parent plays a more important role in the determination of diapause. The N strain also showed a short-day photoperiodic response at the lower temperature of 20°C, indicating that the N strain still has the capability to enter a photoperiodically induced diapause, depending on the rearing temperature. Results from all crosses under photoperiods LD 12:12 or LD 13:11 at 22°C showed that inheritance of diapause in H. armigera did not fit an additive hypothesis and that the capacity for diapause was transmitted genetically in the manner of incomplete dominance with non-diapause characteristic partially dominant over the diapausing. Diapause duration in hybrid pupae was also influenced by their inheritance from both parents. Diapause duration in hybrid pupae was intermediate between those of their parents. These results reveal that both diapause induction and duration are under the control of polygene. © 2012 Elsevier Ltd.
Chen S.,Jiangxi University of Science and Technology |
Lai W.J.,Jiangxi Environmental Engineering Vocational College
Materials Science Forum | Year: 2014
The W6Mo5Cr4V2 high-speed steel tool was magnetized by an AC magnetization device which made by ourselves, and the cutting experiments were carried out in a general purpose machine with the magnetized high-speed steel tool and non-magnetized high-speed steel tool. The experimental results indicated that the cutting surface roughness of the workpiece could be improved by the magnetized W6Mo5Cr4V2 high-speed steel tool. Meanwhile,the magnetization time and magnetization frequency should be regarded as the key of magnetization adjusting parameters. The magnetized W6Mo5Cr4V2 high-speed steel tool presentedthe different cutting performance under the different magnetization time and frequency, in which there were the better effects in low frequency. In addition, the experimental results also showed that the cutting force could be reduced during the cutting process by using of the magnetized W6Mo5Cr4V2 high-speed steel tool and the formation of the built-up edge in the tool could be inhibited, thereby the tool life was prolonged and the processing quality was improved. © (2014) Trans Tech Publications, Switzerland.
Yi F.,Shanghai Institute of Technology |
Zhang X.,Shanghai Institute of Technology |
Sun H.,Shanghai Institute of Technology |
Chen S.,Jiangxi Environmental Engineering Vocational College
Acta Chimica Sinica | Year: 2012
The synthetic methods of alkaline ionic liquid hydroxide 1-butyl-4-dimethy1 aminopyridine were optimized by using orthogonal experimental. By using triethylene diamine (DABCO) as catalyst and alkaline ionic liquid as solvent, aromatic aldehydes with methyl acrylate's Baylis-Hillman reaction was studied. Experimental results showed that fast reaction rate and high yield were obtained in the presence of the alkaline ionic liquid. On this basis, Baylis-Hillman reaction under the influence of water-ionic liquid composite system was further studied, and obtained better result.
Hu J.,Anhui Normal University |
Zhang D.,Anhui Normal University |
Hao J.,Anhui Normal University |
Huang D.,Jiangxi Environmental Engineering Vocational College |
And 3 more authors.
Molecular Biology Reports | Year: 2010
In this paper, the complete mitochondrial genome of Acraea issoria (Lepidoptera: Nymphalidae: Heliconiinae: Acraeini) is reported; a circular molecule of 15,245 bp in size. For A. issoria, genes are arranged in the same order and orientation as the complete sequenced mitochondrial genomes of the other lepidopteran species, except for the presence of an extra copy of tRNAIle(AUR)b in the control region. All protein-coding genes of A. issoria mitogenome start with a typical ATN codon and terminate in the common stop codon TAA, except that COI gene uses TTG as its initial codon and terminates in a single T residue. All tRNA genes possess the typical clover leaf secondary structure except for tRNASer(AGN), which has a simple loop with the absence of the DHU stem. The sequence, organization and other features including nucleotide composition and codon usage of this mitochondrial genome were also reported and compared with those of other sequenced lepidopterans mitochondrial genomes. There are some short microsatellite-like repeat regions (e.g., (TA)9, polyA and polyT) scattered in the control region, however, the conspicuous macro-repeats units commonly found in other insect species are absent. © 2009 Springer Science+Business Media B.V.
Xu H.,Jiangxi Environmental Engineering Vocational College
Jixie Qiangdu/Journal of Mechanical Strength | Year: 2015
The kinematics of parallel structures in machine tool play an important role in the machining precision, and this paper focused on the kinematics and modeling of gantry parallel structure to analyze the dynamic response performance of the structure. It took a gantry parallel structure with plane motion for example, decomposed the motions of parallel structure with parallelogram, gave a gantry kinematic model of the system. Motion control method was studied to establish a projection function of model by the inputs and output. Based on this, the optimization algorithm was proposed to obtain the optimal control parameters for parallel structure, and the method can greatly improve the quick response of the parallel structure. © 2015, Journal of Mechanical Strength. All right reserved.
Lv Y.,Jiangxi Environmental Engineering Vocational College
Future Communication, Information and Computer Science - Proceedings of the International Conference on Future Communication, Information and Computer Science, FCICS 2014 | Year: 2015
Graphics processing technology has gradually evolved into a new discipline widely used in multiple fields with the development of computers. According to the concept and characteristics of computer graphics processing technology and some problems in its application—the quality of operating personnel, software and hardware, the work is aimed at an analysis of its application. A conclusion is drawn that the effects of computer graphics processing can be ensured as high-quality personnel and advanced software are selected. For a practical selection of software, moreover, it is necessary to carry a targeted selection rather than choose the most advanced software, combining it with hardware performance. © 2015 Taylor & Francis Group, London.
Yang J.-G.,Central South University |
Zhang X.-L.,Central South University |
Yang J.-Y.,Jiangxi Environmental Engineering Vocational College
JOM | Year: 2015
The main purpose of this study is to characterize and separate silver from a zinc sulfide concentrate through co-smelting with lead oxide dust. This article reports the optimization of process parameters, such as flux composition, co-smelting temperature, flux dosage, and charging material compositions, on the silver separation rate and resultant zinc sulfide concentrate grade. A maximum silver recovery of 97.36%, zinc sulfide concentrate grade of 43.91%, and 98.25% crude lead enriched silver are obtained under the optimized condition of temperature 900°C, smelting duration 120 min, 27.5 wt.% zinc sulfide concentrate, and 15.0 wt.% lead oxide dust, flux composition WNaOH/WNa2CO3=1/3. This co-smelting process was proven effective to separate silver from zinc sulfide concentrate and produce a higher grade zinc sulfide concentrate. Especially, it was found to be effective to separate some associated impurities from zinc sulfide concentrate, such as arsenic, cadmium, fluorine, and chlorine etc. © 2014, The Minerals, Metals & Materials Society.
Zhong Z.K.,Jiangxi Environmental Engineering Vocational College
Applied Mechanics and Materials | Year: 2014
Manufacturing execution system is the software system that is used most widely for manufacturing enterprises to realize informatization. In order to solve the problem of distributed heterogeneous environment, MES introduces the concept of middleware. It is in the middle of the operation system software and MES and above the operation system, network and database and below the MES. It helps the software developers to flexibly and high effectively develop and integrate complicated all modules in MES as well as complicated application and communications in enterprises. This design adopts two kinds of middleware. The first kind is Message Oriented Middleware (MOM). Message Oriented Middleware hides the details of interaction between all kinds of machine equipment and MES data under the unified data specifications. It makes in-time, high-efficient and stable data transmission as well as easily copes with the complicated production environment. The second kind is common transaction processing middleware. It enclosures the details of transaction processing and offers a stable transaction platform, enabling the developers to pay attention to the development of business logic. It ensures the development qualities and the development costs. © (2014) Trans Tech Publications, Switzerland.
Xu H.,Jiangxi Environmental Engineering Vocational College
Applied Mechanics and Materials | Year: 2014
The paper takes a method of a low speed processer based on FPGA hardware accelerator SOC units to realize the MP3 player, and include some peripheral devices. The experimental results show that the system has implemented the basic functions of the MP3 player, having its own advantages on increasing the decoding speed and reducing the system consumption. The system is convenient to redesign for more function in the future. In conclusion, it has a wide application prospect. © (2014) Trans Tech Publications, Switzerland.