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Search Results: 1 - 10 of 3327 matches for " Libin Niu "
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Effect of organic fertilizers used in sandy soil on the growth of tomatoes  [PDF]
Yongxia Hou, Xiaojun Hu, Wenting Yan, Shuhong Zhang, Libin Niu
Agricultural Sciences (AS) , 2013, DOI: 10.4236/as.2013.45B006
Abstract:

In order to reveal the regulating capacity of organic fertilizers on sandy soil, pots experiments were carried out. The growth of tomatoes planted on sandy soil amended by organic fertilizers was measured. Organic fertilizers can be helpful to improve the plant height, stem diameter, the aerial parts fresh weight, root fresh weight, leaf photosynthetic rates and photosynthesis, and lay a good foundation for the growth of   tomatoes. The effect of organic fertilizer is the most significant. Among all the treatments of adding 2.5%, 5%, 10% organic fertilizers, adding 10% organic fertilizers are the best. It can significantly enhance the growth and photosynthesis of tomatoes, and it is among the best of these three soil treatments for sandy soil.

Study on in-situ WC particles/tungsten wire reinforced iron matrix composites under electromagnetic field
Niu Libin,Xu Yunhua,Wu Hong
China Foundry , 2010,
Abstract: By applying electromagnetic field to a system consisting of tungsten wires and grey cast iron melt, the grey cast iron matrix composite reinforced by either in-situ WC particles or the combination of in-situ WC particles and the residual tungsten wire was obtained. By means of differential thermal analysis (DTA), the pouring temperature of iron melt was determined at 1,573 K. The microstructures of the composites were analyzed by using of X-ray diffraction (XRD), scanning electron microscopy (SEM) equipped with an energy dispersive spectrum (EDS) and pin-on-disc abrasive wear test. The obtained results indicated that, with the enhancing frequency of electromagnetic field, the amount of in-situ WC particles gradually increases, leading to continuous decrease of the residual tungsten wires. When the electromagnetic field frequency was up to 4 kHz, tungsten wires reacted completely with carbon atoms in grey cast iron melt, forming WC particals. The electromagnetic field appeared to accelerate the elemental diffusion in the melt, to help relatively quick formation of a series of small Fe-W-C ternary zones and to improve the kinetic condition of in-situ WC fabrication. As compared with the composite prepared without the electromagnetic field, the composite fabricated at 4 kHz presented good wear resistance.
Effects of heat treatment on mechanical properties and microstructure of tungsten fi ber reinforced grey cast iron matrix composites
Niu Libin,Xu Yunhua,Peng jianHong
China Foundry , 2009,
Abstract: In this study, grey cast iron matrix composites reinforced by different volume fractions of tungsten fibers (Vr = 0.95 %, 1.90 %, 2.85 %, 3.80 %) were investigated in as-cast and under the heat treatment temperatures of 1,000℃ and 1,100℃. The microstructure and mechanical properties of the composites were analyzed and tested by means of SEM, micro-hardness tester and three-point bend testing. The results show that with increasing of the volume fraction of tungsten fibers, the composites reinforced by the tungsten fiber have higher fl exural strength and modulus than that of cast iron without reinforcement, and the fl exural strength increases with the increasing of heat treatment temperatures. Due to diffusion reaction between matrix and reinforcing phases, the process of heat treatment, the number of graphite fl akes in the matrix seemingly becomes lower; and some hard carbide particles are formed around the residual tungsten fi bers. Not only does the hardness of both matrix and reinforcement change tremendously, but also the region of reinforcement is also extended from the original 0.11 mm to 0.19 mm in radius.
FDI in Services and Manufacturing Efficiencies in Host Countries: Evidence from China  [PDF]
Libin Luo
iBusiness (IB) , 2013, DOI: 10.4236/ib.2013.53B037
Abstract:

The paper studies the correlations between FDI in services and manufacturing efficiencies in host countries. First a theoretical analysis is presented on the direct and indirect channels through which FDI in services enhances manufacturing efficiencies in host countries. Then the forward linkages and backward linkages between FDI in services and manufacturing sector in host countries are tested empirically using China’s industrial panel data. We find that FDI in services has positive forward and backward linkage effects on China’s manufacturing sector, with forward linkages stronger than backward linkages, and the wholesale, retail, trade and restaurant sector has the strongest linkage effects.

A Study of Fostering College English Students’ Awareness of Cultural Comparison in Chinese Classrooms  [PDF]
Libin Duan
Open Journal of Social Sciences (JSS) , 2016, DOI: 10.4236/jss.2016.45013
Abstract: The study examines the effectiveness of different culture-oriented approaches to foster college English students’ awareness of cultural comparison in Chinese classrooms. A survey about college students’ status quo in English learning indicates that they are poor in western cultural knowledge, especially lack cultural comparative sense and ability. Therefore, based on the second language acquisition theory and the constructivism theory, the study aims at exploring some effective culture-oriented approaches to develop Chinese college English students’ cross-cultural communication ability. After a term’s experimental teaching in the author’s two classes, and data collection and analysis, it is concluded that the following approaches are effective: duty report, various classroom activities, self-access study, hosting the online instruction, etc.
[1,1′-Bis(diphenylphosphanyl)ferrocene-κ2P,P′](η5-cyclopentadienyl)(dicyanamido-κN)ruthenium(II) dichloromethane monosolvate
Libin Gao
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812014274
Abstract: The title compound, [FeRu(C5H5)(C2N3)(C17H14P)2], was obtained by reaction of Cp(dppf)RuCl [dppf = 1,1′-bis(diphenylphosphanyl)ferrocene] with sodium dicyanamide in dichloromethane. The RuII atom is capped by an η5-cyclopentadienyl (Cp) ring, a chelating dppf and a terminal C2N3 unit, giving three-legged piano-stool geometry. The C—N—C angle of the N(CN)2 ligand [120.8 (6)°] is significantly smaller than that in the corresponding diruthenium complex [127.2 (9)°; Zhang et al. (2003). Inorg. Chem. 42, 633–640] due to steric hindrance between the two {Cp(PPh3)2Ru} building blocks. Disorder was found in the dichloromethane solvent molecule, which was refined as disordered over two positions, with a site-occupancy ratio of 0.53:0.47 (2).
Scale Invariant Streamline Equations and Strings of Singular Vorticity
Alexander Libin
Physics , 2012,
Abstract: A linear combination with constant in space amplitudes of a pair of dual anisotropic decaying Beltrami flows (the Trkal solutions)with the same eigenvalue of the curl operator and of an orthogonal constant velocity vector to the Beltrami pair,yields a triplet solution of the force-free Navier-Stokes equation. Slight space variation of the amplitudes (large scale perturbation) yields the emergence of the time depending phase between the dual Beltrami flows and of the upward velocity,which are unstable at large values of the Reynolds number as well as the formation of the large scale curved prisms of streamlines with edges being the strings of singular vorticity.
Understanding Exhaustive Pattern Learning
Libin Shen
Computer Science , 2011,
Abstract: Pattern learning in an important problem in Natural Language Processing (NLP). Some exhaustive pattern learning (EPL) methods (Bod, 1992) were proved to be flawed (Johnson, 2002), while similar algorithms (Och and Ney, 2004) showed great advantages on other tasks, such as machine translation. In this article, we first formalize EPL, and then show that the probability given by an EPL model is constant-factor approximation of the probability given by an ensemble method that integrates exponential number of models obtained with various segmentations of the training data. This work for the first time provides theoretical justification for the widely used EPL algorithm in NLP, which was previously viewed as a flawed heuristic method. Better understanding of EPL may lead to improved pattern learning algorithms in future.
Pastoral Investigation on the Form and Usage of Local-Style Dwelling Houses in Jiarong Tibetan Traditional Village of Danba County  [PDF]
Bin Cheng, Libin Duan, Yangliu Fu
Journal of Building Construction and Planning Research (JBCPR) , 2018, DOI: 10.4236/jbcpr.2018.62004
Abstract: Under the dual background of rapid development and urbanization, the research is of practical significance for the construction and development of new rural harmonious society on the traditional villages, residential forms and ways of using. The purpose of this study is to learn the characteristics of the local residential forms and their usage, reveal the relationship between these characteristics and villagers’ lifestyles, and grasp the villagers’ evaluation of the satisfaction on living space, by the investigation of 168 questionnaires, 16 families in-depth interviews and survey mapping in the W, Y and Z villages of Suopo Township, Danba County, Sichuan Province. The resulted showed that: 1) Residents have obvious uniform features, mostly 3 - 5 layers of single-family residences, mostly in the area of 400 - 500 m2. The height of the house and the rooms has a relatively fixed modulus. 2) In the survey of the usage of local dwelling houses, it was found that farmers have a fixed model for the use of residential buildings. Most of the living activities are gathered in their own courtyards, and the utilization of the living room is usually limited. The floors above the second floor often have the terrace formed by the retreat to dry the food. There are often more bedrooms for spare, more than 90% of the family of four or more have two or more living rooms. 3) The residential area is embodied in both horizontal and vertical directions: the first floor of the indoor room from the courtyard to the dining room has the property of semi-open and semi-private space, and it is the main place for neighborhood interaction; and the rooms of the second and above are more private. 4) In the long process of life, the form and usage of houses will change with the changes of external factors. The traditional dwelling houses will be built or renovated, accounting for about 36% of the total amount surveyed.
A Study on the Control and Guidance Strategy of the Diaolou Style Building of Qiang People Based on Behavioral Analysis  [PDF]
Bin Cheng, Libin Duan, Haifeng Lan
Journal of Building Construction and Planning Research (JBCPR) , 2018, DOI: 10.4236/jbcpr.2018.63012
Abstract: Diaolou style building is an important residential building of Qiang people. In recent years, Qiang people’s own cultural identities and behavioral awareness have transformed. Due to the lack of attention to the inheritance of original architectural style and the absence of a detailed scientific protection of the landscape, the architectural style of Diaolou style building gradually loses its vitality. It is difficult to control and guide it effectively. And tourism economy which enjoys a direct link with the architecture has been confined to further development. From the perspective of behavioral science, this study innovatively analyzes the Diaolou style building of Qiang people by combining the methodology of Lew in metal of behavior and Analytic Hierarchy Process. Firstly, 32 symbols are chosen as Diaolou architectural style factors from the selection of more than 100 Diaolou architectural decorative symbols. Then by measuring their weight coefficients through the Analytic Hierarchy Process, eight main style factors have been screened out. After field research, we analyze the actual use of the style factors of the six typical villages such as Gina. On this basis, this paper analyzes the behavioral factors of Diaolou style building of Qiang people, deconstructs its use and puts forward a concept which takes style control as a guidance and behavior guidance as a strategy to protect and develop Diaolou style building of Qiang people. It is also proposed that a control and guidance strategy of inheritance and development of Qiang Diaolou architectural style, including master the influencing factors as a whole, follow the principle of people-oriented, compound function, dynamic development and highlighting national aesthetics, based on its style system, and grasp the trend of architectural style, etc. The study provides an effective guarantee for the further development of rural tourism, and a necessary theoretical and technical guidance for the government to adopt targeted steps.
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