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Search Results: 1 - 10 of 19040 matches for " Ningning Song "
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Convenient Way of Extend Linear Expenditure System Modeling without Regression  [PDF]
Ningning Song, Yiqing Liu
Open Journal of Statistics (OJS) , 2015, DOI: 10.4236/ojs.2015.56055
Abstract:

Extend Linear Expenditure System model is a collection of multiple linear models, and modeling is a clearly tedious process. The innovation of this paper is trying to find a simple way of ELES modeling, which means, in order to omit the modeling process one by one, we try to use Excel functionality to create a model workplace. As long as you replace the original sample data in the workspace, you can get the results you want.

The Modified Kadomtsev-Petviashvili Equation with Binary Bell Polynomials  [PDF]
Ningning Hu, Shufang Deng
Journal of Applied Mathematics and Physics (JAMP) , 2014, DOI: 10.4236/jamp.2014.27065
Abstract:

Binary Bell Polynomials play an important role in the characterization of bilinear equation. The bilinear form, bilinear B?cklund transformation and Lax pairs for the modified Kadomtsev-Petviashvili equation are derived from the Binary Bell Polynomials.

The Impact of Complaints between Frontline Service Employees on Consumers—Based on Critical Incident Technique  [PDF]
Jihua Zhang, Ningning Wang
American Journal of Industrial and Business Management (AJIBM) , 2018, DOI: 10.4236/ajibm.2018.83054
Abstract: The critical incident technique was adopted to collect 174 critical events which were divided into 3 categories and 9 types about the complaint behaviors among the front-line service employees witnessed by the consumers. In addition, this paper discusses the influence mechanism of employees complaint behavior on consumers and enriches the theory research of employees' complaints and brand internalization.
Three novel α-L-iduronidase mutations in 10 unrelated Chinese mucopolysaccharidosis type I families
Sun, Luning;Li, Chunyi;Song, Xiaoyu;Zheng, Ningning;Zhang, Haipeng;Dong, Guizhang;
Genetics and Molecular Biology , 2011, DOI: 10.1590/S1415-47572011005000006
Abstract: mucopolysaccharidosis type i (mps i) arises from a deficiency in the α-l-iduronidase (idua) enzyme. although the clinical spectrum in mps i patients is continuous, it was possible to recognize 3 phenotypes reflecting the severity of symptoms, viz., the hurler, scheie and hurler/scheie syndromes. in this study, 10 unrelated chinese mps i families (nine hurler and one hurler/scheie) were investigated, and 16 mutant alleles were identified. three novel mutations in idua genes, one missense p.r363h (c.1088g > a) and two splice-site mutations (c.1190-1g > a and c.792+1g > t), were found. notably, 45% (nine out of 20) and 30% (six out of 20) of the mutant alleles in the 10 families studied were c.1190-1g > a and c.792+1g > t, respectively. the novel missense mutation p.r363h was transiently expressed in cho cells, and showed retention of 2.3% idua activity. neither p.w402x nor p.q70x associated with the hurler phenotype, or even p.r89q associated with the scheie phenotype, was found in this group. finally, it was noted that the chinese mps i patients proved to be characterized with a unique set of idua gene mutations, not only entirely different from those encountered among europeans and americans, but also apparently not even the same as those found in other asian countries.
Relaxor behavior of (1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 ceramics
NingNing Wu,XueMei Song,YuDong Hou,ManKang Zhu,Chao Wang,Hui Yan
Chinese Science Bulletin , 2009, DOI: 10.1007/s11434-009-0002-0
Abstract: In the present work, the phase transitions and relaxor behavior of (1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 (PMN-PT, x = 0.2–0.4) ferroelectric ceramics have been investigated by means of X-ray diffraction, dielectric spectroscopy, the P-E hysteresis loop measurements and Raman scattering techniques. Structural analysis revealed that with the increase of PbTiO3 content, PMN-PT ceramics experienced a gradual phase transition process from rhombohedral to tetragonal. It is usually believed that such kinds of phase transitions resulted in the linear decrease of relaxation degree. Surprisingly, our analysis of the dielectric spectra revealed that the indicator of the degree of diffuseness y reached the maximum value near morphotropic phase boundary (MPB) (x = 0.32), then decreased with the further increase of PbTiO3 content. The large dielectric relaxor feature near MPB may be attributed to the formation of ordered nanodomains, resulting from complex coexisting nanostructures. Further, the P-E hysteresis loop measurements and Raman analysis of the B-site cation order correlated well with the dielectric measurement results. It was found that the hysteresis loop squareness R sq received the minimum value while the inverse of the value of full wide of half maximum (FWHM) of A1g mode reached the maximum value at MPB composition, which showed similar trends to y.
Relaxor behavior of (1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 ceramics

NingNing Wu,XueMei Song,YuDong Hou,ManKang Zhu,Chao Wang,Hui Yan,

科学通报(英文版) , 2009,
Abstract: In the present work, the phase transitions and relaxor behavior of (1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 (PMN-PT, x = 0.2–0.4) ferroelectric ceramics have been investigated by means of X-ray diffraction, dielectric spectroscopy, the P-E hysteresis loop measurements and Raman scattering techniques. Structural analysis revealed that with the increase of PbTiO3 content, PMN-PT ceramics experienced a gradual phase transition process from rhombohedral to tetragonal. It is usually believed that such kinds of phase transitions resulted in the linear decrease of relaxation degree. Surprisingly, our analysis of the dielectric spectra revealed that the indicator of the degree of diffuseness y reached the maximum value near morphotropic phase boundary (MPB) (x = 0.32), then decreased with the further increase of PbTiO3 content. The large dielectric relaxor feature near MPB may be attributed to the formation of ordered nanodomains, resulting from complex coexisting nanostructures. Further, the P-E hysteresis loop measurements and Raman analysis of the B-site cation order correlated well with the dielectric measurement results. It was found that the hysteresis loop squareness R sq received the minimum value while the inverse of the value of full wide of half maximum (FWHM) of A1g mode reached the maximum value at MPB composition, which showed similar trends to y. Supported by the National Natural Science Foundation of China (Grant No. 60601020), Project of New Star of Science and Technology of Beijing (Grant No. 2007A014), Natural Science Foundation of Beijing (Grant No. 4072006), Science and Technology Development Project of Beijing Education Committee (Grant No. KM200810005012)
Numerical Simulation of Fracture Width Influencing Law on Reservoir Permeability after Fracturing
Ningning YANG
Advances in Petroleum Exploration and Development , 2012, DOI: 10.3968/2403
Abstract: Based on the fluid-solid coupling theory in porous media, a finite element simulation model for dynamic fracture creation is established and the finite element simulation program is developed, and then relevant finite element simulation is conducted on the permeability distribution under the simultaneous influence of fracture creation and pressure-released production. Research results demonstrate that the permeability distribution law after fracturing is similar for fractures with different widths, and the permeability distribution shapes in ellipse. When the maximal fracture width is greater than or equal to 6mm, the influence region on the permeability increases apparently with the increment of fracture width, so does the influence in the vicinity of the wellbore. The fracture creation and pressure-released production alternately dominates the alteration of permeability in different regions. Dynamic fracture creation plays a more important role in permeability alteration within the region less than 5m away from the wellbore axis. The larger for the fracture width, the more sensitive for the permeability alteration gradient is observed in the region in the vicinity of the wellbore. In the region 20m away from the wellbore axis, the pressure-released production affect more apparently since dynamic fracture creation has a negligible effect in the region. Key words:Fluid-solid coupling; Permeability; Fracture; Wellbore; Simulation
Analysis of the Reasons for the Left-Behind of the Elderly in Central and Eastern China  [PDF]
Ningning Zhang
Open Journal of Social Sciences (JSS) , 2019, DOI: 10.4236/jss.2019.78019
Abstract: Based on Pierre Bourdieu’s cultural capital theory and through field interviews, this paper extracts the daily spoken language of the left-behind elderly in the two places and analyzes the differences of left-behind causes in the central and eastern regions. Habituation means that the old people are already familiar with the production mode, life style and communication mode, and find their own class position in the mechanism of continuous operation. Old people from both places consider they stay in their homeland voluntarily, but there are some differences between them. The east is more like the bonds of nostalgia, while the middle is more like a realistic compromise.
Comparisons of stable isotopic fractionation in winter and summer at Baishui Glacier No. 1, Mt. Yulong, China
玉龙雪山冰川稳定同位素分馏冬夏对比

Hongxi Pang,Yuanqing He,Aigang Lu,Jingdong Zhao,Baoying Ning,Lingling Yuan,Bo Song,Ningning Zhang,
庞洪喜
,何元庆,卢爱刚,ZHAO Jingdong,NING Baoying,YUAN Lingling,SONG Bo,ZHANG Ningning

地理学报(英文版) , 2006,
Abstract: Based on the data of δ18O in surface snow, snow pits, meltwater and the glacier-fed river water at Baishui Glacier No.1, Mt. Yulong, the isotopic fractionation behaviors in the typical monsoonal temperate glacier system in winter and summer were compared. The results indicate that the isotopic fractionation degree in summer is greater than that in winter, suggesting that the snow/ice melting is more intense in summer. Moreover, whenever it is in winter or summer, from surface snow to meltwater, and to glacier-fed river water, the gradient of δ18O with altitude gradually increases. This shows that the degree of isotopic fractionation gradually strengthens when surface snow is being converted into meltwater and finally into glacial river water, which suggests that the influence of post-depositional processes on δ18O gradient in the monsoonal temperate glacier region differs spatially. Foundation: National Natural Science Foundation of China, No.40501014; No.90511007; Talent Culture Project for Special Subject of Glaciology and Geocryology, No.J0130084 Author: Pang Hongxi (1978-), Ph.D. and Associate Professor, specialized in stable isotopes in waters and climate change.
Changes of Monsoonal Temperate Glaciers in China during the Past Several Decades under the Background of Global Warming
Yuanqing He,Zongxing Li,Bo Song,Ningning Zhang,Xianzhong He,Wilfred HTheakstone,Tao Pu,Qiao Liu,
Yuanqing He
,Zongxing Li,Bo Song,Ningning Zhang,Xianzhong He,Wilfred H.Theakstone,Tao Pu,Qiao Liu

寒旱区科学 , 2008,
Abstract: Based on various data, it can be concluded that eight monsoonal temperate glaciers in China were in stationary or advancing between 1900s~1930s and 1960s~1980s, and were in retreating during 1930s~1960s and 1980s~present under the background of climate warming. The total glacier area has reduced by 3.11 km2 with a mean front altitude rise of 3.2 m/yr and 4 glaciers have disappeared in Mt. Yulong during 1957~1999. Mass balance records indicated that glaciers had suffered a constant mass loss of snow and ice during the last several decades, and the accumulated mass balance in Hailuogou basin in Mt. Gongga was ?10.83 m water equivalent in the past 45 years with a annual mean value of -0.24 m, and the value at Baishui glacier No.1 was -11.38 m water equivalent in the past 52 years with -0.22 m/yr. The inverse variation between mass balance and temperature in China and the Northern Hemisphere reflected that climate warming is mainly corresponding to constant ice and snow mass loss in the past 50 years. The change of the glaciers’ surface morphology has occurred since the 1980s, such as enlargement of glacier-lake and ice falls, resulted from the accelrative climate warming.
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