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Search Results: 1 - 10 of 127200 matches for " Li Jianqiang "
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The Development of Leisure Sports in Ancient China and Its Contemporary Sports Culture Value  [PDF]
Jianqiang Guo, Rong Li
Advances in Physical Education (APE) , 2017, DOI: 10.4236/ape.2017.74031
Abstract: The traditional culture not only influences the life of modern people, but also promotes the sports undertakings in China. Influenced by the traditional culture, the development of leisure sports in ancient China has very strong traditional cultural nature and its contemporary value connotation. This paper analyzes and discusses on the development of leisure sports in ancient China and its contemporary sports culture value, aiming at further making the development of leisure sports in ancient China and its cultural value connotation clearly, doing some beneficial researches and making some contributions.
The Study on Farmers' Cognition and Production Inclination of Organic Vegetable
Jianqiang Li
Journal of Agricultural Science , 2012, DOI: 10.5539/jas.v4n6p272
Abstract: Based on the department interviews and questionnaire survey in Nanxi County, this paper analyzes on farmers’ cognition of organic vegetables and factors which influence farmers’ production inclination through Logistic model. The results show: 54.70% farmers can understand organic vegetables well; farmland areas per person, non-agricultural income, price, technology, and educational level are main factors that influence farmers’ production inclination. Finally, according to these results the paper proposes relative comments that promote the production and development of organic vegetables.
An Analysis of Interest Imbalance of Farmers in Basic Farmland Protection Areas
Haida Zhang,Jianqiang Li
Asian Social Science , 2012, DOI: 10.5539/ass.v8n11p44
Abstract: Ever since China carried out the policy of basic farmland protection, the speed of reduction in the amount of cultivated land resources has been alleviated to a certain extent, which indicates that the policy of basic farmland protection has achieved certain effect. However, with elapsing of the time, negative effects of the protection policy also begins to emerge. Taking the data about a field survey in Wuhan as the case study, this article makes a comparison between the income pattern and level of farmers both from basic farmland protection areas and from non-basic farmland protection areas, works out the opportunity cost of farmers’ protection of cultivated land in the protection areas, employs the cost benefit analysis method and gets the following specific conclusions. In terms of planting structure, what farmers from protection areas plant most is food crop, whereas farmers from non-protection areas mostly plant commercial crop. This difference of planting structure leads to imbalance of interests of farmers. In terms of the income level, the proportion of income of farmers in protection areas to the income of farmers in non-protection areas is 1:4.3. Meanwhile, the proportion of income of farmers in protection areas to the income of urban residents is 1:6.25, indicating an extremely obvious interest imbalance.
Analysis on Physical Mechanism of Sound Generation inside Cavities Based on Acoustic Analogy Method  [PDF]
Dangguo Yang, Jianqiang Li, Jun Liu, Yi Zhang, Yaohua Li
Open Journal of Fluid Dynamics (OJFD) , 2013, DOI: 10.4236/ojfd.2013.31003
Abstract: Analysis of coupling aerodynamics and acoustics are performed to investigate the self-sustained oscillation and aerodynamic noise in two-dimensional flow past a cavity with length to depth ratio of 2 at subsonic speeds. The large eddy simulation (LES) equations and integral formulation of Ffowcs-Williams and Hawings (FW-H) are solved for the cavity with same conditions as experiments. The obtained density-field agrees well with Krishnamurty’s experimental schlieren photograph, which simulates flow-field distributions and the direction of sound wave radiation. The simulated self-sustained oscillation modes inside the cavity agree with Rossiter’s and Heller’s predicated results, which indicate frequency characteristics are obtained. Moreover, the results indicate that the feedback mechanism that new shedding-vortexes induced by propagation of sound wave created by the impingement of the shedding-vortexes in the shear-layer and rear cavity face leads to self-sustained oscillation and high noise inside the cavity. The peak acoustic pressure occurs in the first oscillation mode and the most of sound energy focuses on the low-frequency region.
Study on boundary search method for DFM mesh generation
Li Ri,Li Fei,Zhang Jianqiang
China Foundry , 2012,
Abstract: The boundary mesh of the casting model was determined by direct calculation on the triangular facets extracted from the STL file of the 3D model. Then the inner and outer grids of the model were identified by the algorithm in which we named Inner Seed Grid Method. Finally, a program to automatically generate a 3D FDM mesh was compiled. In the paper, a method named Triangle Contraction Search Method (TCSM) was put forward to ensure not losing the boundary grids; while an algorithm to search inner seed grids to identify inner/outer grids of the casting model was also brought forward. Our algorithm was simple, clear and easy to construct program. Three examples for the casting mesh generation testified the validity of the program.
A Two-Step Crystallization Route for Hierarchical SAPO-34 Molecular Sieves: Unique Structural Features and Catalytic Property for DTO  [PDF]
Guomin Li, Zhuo Li, Xiangzhong Ren, Yan Zhang, Zhiwen Chen, Jianqiang Yu
Materials Sciences and Applications (MSA) , 2019, DOI: 10.4236/msa.2019.104023
Abstract: The hierarchical structure can significantly improve the diffusion efficiency of the catalyst and regulate the product distribution. Therefore, the preparation of hierarchical SAPO-34 molecular sieve has been a hot research topic. With Cetyltrimethyl Ammonium Bromide (CTAB) and Diethylamine (DEA) as templates, a two-step crystallization process was employed to synthesize hierarchical SAPO-34 molecular sieves. We found that the aging process is vital for the formation of pure phase SAPO-34. It was investigated the relationship of crystallinity trend and mesoporous content with the crystallization time. The results showed that the prolongation of crystallization time was beneficial to enhance the crystallinity of the molecular sieve, but unfavourable to the retention of mesoporous structure. The formation process of hierarchical SAPO-34 molecular sieve involved agglomeration, disintegration, crystallization, re-agglomeration and growth. The hierarchical SAPO-34 molecular sieve with a satisfactory crystallinity and considerable mesoporous structure could be obtained after 36 hours of crystallization. Moreover, the sample had the most suitable acid strength as well as acid amount. The catalytic activity was investigated by catalytic dimethyl ether (DME) to olefin (DTO) reaction. It revealed that the conversion of DME and the selectivity to olefins over the hierarchical SAPO-34 molecular sieve were significantly enhanced with comparison to that over microporous SAPO-34 molecular sieve. The amount of coke deposition of the hierarchical SAPO-34 molecular sieve (14.2%) was lower than that over the microporous molecular sieve (16.5%). Meanwhile, the propylene selectivity of hierarchical SAPO-34 was higher than that of microporous SAPO-34 in the whole reaction. In a word, the hierarchical SAPO-34 molecular sieve synthesized in this study showed a longer catalytic life, higher coke deposition resistance and higher propylene selectivity.
Gold Nanoparticles With Special Shapes: Controlled Synthesis, Surface-enhanced Raman Scattering, and The Application in Biodetection
Jianqiang Hu,Zhouping Wang,Jinghong Li
Sensors , 2007, DOI: 10.3390/s7123299
Abstract: Specially shaped gold nanoparticles have intrigued considerable attention becausethey usually possess high-sensitivity surface-enhanced Raman scattering (SERS) and thusresult in large advantages in trace biodetermination. In this article, starch-capped goldnanoparticles with hexagon and boot shapes were prepared through using a nontoxic andbiologically benign aqueous-phase synthetic route. Shape effects of gold nanoparticles onSERS properties were mainly investigated, and found that different-shaped goldnanoparticles possess different SERS properties. Especially, the boot-shaped nanoparticlescould induce more 100-fold SERS enhancements in sensitivity as compared with those fromgold nanospheres. The extremely strong SERS properties of gold nanoboots have beensuccessfully applied to the detection of avidin. The unique nanoboots with high-sensitivitySERS properties are also expected to find use in many other fields such as biolabel,bioassay, biodiagnosis, and even clinical diagnosis and therapy.

Li Jianqiang,

植物科学学报 , 1988,
Abstract: This paper is a revision of genus Crotalaria(Papilionaceae) in Yunnan. 30 species and 2 varieties of this genus have been described so far. Hence, there are 27 species, including 4 exotic species, and 4 varieties are distributed in this very province. Among them, 1 new variety, Comairei var. pubescens, and 3 new combinations, C. yunnanensis var. heqingensis, C. peguana var. qiubeiensis, and C. albida var. gengmaensis, and 1 new record of China, C. humifusa, are included. In addition, 2 species are combined, they are C. jingpingensis to C. prostrata and C. yuanjiangensis to C. medicaginea. Besides, the pollen morphology in some taxa of this genus has been examined.

Li Jianqiang,

植物科学学报 , 1988,
Abstract: 本文对猪屎豆属(Crotalaria)6种植物的核型进行了研究(C. yunnanensis仅报道了染色体数目),并结合它们的分类和分布特征,初步探讨了它们的演化关系;其中C. bracteata的染色体数目和核型以及C. yunnanensis的染色体数目均为首次报道。
A Query-specific Reasoning Method for Inconsistent and Uncertain Ontology
Bo Liu,Jianqiang Li,Yu Zhao
Lecture Notes in Engineering and Computer Science , 2011,
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