OALib Journal期刊

ISSN: 2333-9721




2019 ( 1 )

2018 ( 42 )

2017 ( 57 )

2016 ( 52 )


匹配条件: “ Pingping Song” ,找到相关结果约18076条。
Research on Social Capital Selection of Public-Private-Partnership Project  [PDF]
Yufang Shi, Pingping Song
Open Access Library Journal (OALib Journal) , 2018, DOI: 10.4236/oalib.1104652
The way of cooperation between government and social capital is widely used in the field of infrastructure construction. According to relevant data, the social capital participating in PPP (Public Private Partnership) project is divided into three categories, and the strengths and weaknesses are analyzed; the evaluation index system of social capital is constructed from four aspects of financial ability, technical ability, management ability and historical project evaluation, and the selection evaluation model is constructed based on fuzzy comprehensive evaluation method; finally, taking a wastewater treatment plant PPP project as an example, the model is proved to be scientific and reasonable, and provides a new way for the government to choose social capital.
Proteomic Analysis in Nitrogen-Deprived Isochrysis galbana during Lipid Accumulation
Pingping Song, Ling Li, Jianguo Liu
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0082188
Abstract: The differentially co-expressed proteins in N-deprived and N-enriched I. galbana were comparatively analyzed by using two dimensional electrophoresis (2-DE) and matrix-assisted laser desorption/ionization-time-of-flight/tim?e-of-flight-massspectrometry (MALDI-TOF/TOF-MS) with the aim of better understanding lipid metabolism in this oleaginous microalga. Forty-five of the 900 protein spots showed dramatic changes in N-deprived I. galbana compared with the N-enriched cells. Of these, 36 protein spots were analyzed and 27 proteins were successfully identified. The identified proteins were classified into seven groups by their molecular functions, including the proteins related to energy production and transformation, substance metabolism, signal transduction, molecular chaperone, transcription and translation, immune defense and cytoskeleton. These altered proteins slowed cell growth and photosynthesis of I. galbana directly or indirectly, but at the same time increased lipid accumulation. Eight key enzymes involved in lipid metabolism via different pathways were identified as glyceraldehyde-3-phosphate dehydrogenase (GAPDH), phosphoglycerate kinase (PGK), enolase, aspartate aminotransferase (AST), fumarate hydratase (FH), citrate synthase (CS), O-acetyl-serine lyase (OAS-L) and ATP sulfurylase (ATPS). The results suggested that the glycolytic pathway and citrate transport system might be the main routes for lipid anabolism in N-deprived I. galbana, and that the tricarboxylic acid (TCA) cycle, glyoxylate cycle and sulfur assimilation system might be the major pathways involved in lipid catabolism.
Cell Size Dependent Responses of Phytoplankton Assemblages to Nitrate and Phosphate Additions in Surface Waters of the Northern South China Sea  [PDF]
Rong Yi, Yehui Tan, Shengfu Wang, Pingping Shen, Zhixin Ke, Liangmin Huang, Xingyu Song, Gang Li
Open Journal of Marine Science (OJMS) , 2014, DOI: 10.4236/ojms.2014.42008

Bioavailability of nitrogen (N) and phosphorus (P) is known to affect marine phytoplankton physiology, thus influencing their primary productivity; and it’s of general interest to see how the N or/and P additions affect the differently cell-sized phytoplankton assemblages. Data from the northern South China Sea showed that P addition increased up to 6 times of total chl a content within 24 h in the estuarine water; and N+P addition increased more than 20 times of chl a within 144 h in the pelagic water. The P addition powered 18.0% and 149% increase in the carbon fixation of larger (>3 μm) and smaller (<3 μm) cell assemblies from the estuarine water, respectively; while the limited effects were observed between them in the pelagic water. Additions of N and P interactively increased the carbon fixation of both cell-sized assemblies in the pelagic water, but only small cell-sized fraction in the estuarine water. Moreover, the estuarine phytoplankton cells appeared to respond faster to the nutrient additions than the pelagic ones, and the smaller cells respond to a greater extent than their larger counterparts in the estuarine water but not in the pelagic water.

Characteristics and Promotion Research on Fashion Clothing E-marketing  [PDF]
Pingping Meng
Creative Education (CE) , 2012, DOI: 10.4236/ce.2012.37B008

The fashion clothing E-marketing is an important part of the fashion sales. E-marketing brings wider world for the clothing sales. This paper analyses the characteristics, the promotion method, and development suggestions of fashion clothing E-marketing. To sum up, the mature development of E-marketing promotes the development of the fashion clothing marketing.

Study on Turbulence Effects for Beam Propagation in Turbulent Atmosphere  [PDF]
Pingping Pan
Optics and Photonics Journal (OPJ) , 2013, DOI: 10.4236/opj.2013.32B035

Based on the theory for the turbulence and the Rytov method, the propagation formulas of the scintillation index and the mean square angle-of-arrival fluctuation for the beam propagation in atmospheric turbulence have been derived respectively. The propagation properties of the two turbulence effects have been investigated, and the effects of the characteristic parameters of turbulence and the beam parameters have been discussed. The results show that the variation of the two turbulence effects depends on the structure constant of the refractive index fluctuations Cn2, the inner scale of the turbulence l0, the waist width of source beam w0 and the wave length λ. Moreover, there are two parameters including Cn2 and l0 which show more significant effects in atmosphere. Consequently, a new method for determining the characteristics parameters of the turbulence by using the measurement of the scintillation index and the angle-of-arrival fluctuation has been proposed.

Advance in the Detection of Circulating Tumour Cells in Patients with Lung Cancer
Yinjun DONG,Pingping SONG,Baijiang ZHANG,Weidi ZHANG
Chinese Journal of Lung Cancer , 2009,
On Bicomplex Representation Methods and Applications of Matrices over Quaternionic Division Algebra  [PDF]
Junliang Wu, Pingping Zhang
Advances in Pure Mathematics (APM) , 2011, DOI: 10.4236/apm.2011.12004
Abstract: In this paper, a series of bicomplex representation methods of quaternion division algebra is introduced. We present a new multiplication concept of quaternion matrices, a new determinant concept, a new inverse concept of quaternion matrix and a new similar matrix concept. Under the new concept system, many quaternion algebra problems can be transformed into complex algebra problems to express and study. These concepts can perfect the theory of [J.L. Wu, A new representation theory and some methods on quaternion division algebra, JP Journal of Algebra, 2009, 14(2): 121-140] and unify the complex algebra and quaternion division algebra.
Well-Posedness for Tightly Proper Efficiency in Set-Valued Optimization Problem  [PDF]
Yangdong Xu, Pingping Zhang
Advances in Pure Mathematics (APM) , 2011, DOI: 10.4236/apm.2011.14032
Abstract: In this paper, a characterization of tightly properly efficient solutions of set-valued optimization problem is obtained. The concept of the well-posedness for a special scalar problem is linked with the tightly properly efficient solutions of set-valued optimization problem.
Empirical Analysis about Satisfaction Influencing Factors of Core Employee in Chinese Small and Micro Enterprise  [PDF]
Pingping Xu, Ling Qiu
Journal of Human Resource and Sustainability Studies (JHRSS) , 2013, DOI: 10.4236/jhrss.2013.14012
Abstract:  The small and micro enterprises have made an important part of the national economy, and they develop rapidly in re- cent years. Now, there are a large number of small and micro enterprises in China. They have strong employment ab- sorption ability, and they are important objects that are supported by the state. However, the average life of small and micro enterprises is relatively short and the ability of sustainable development is not strong. The main reason is the turnover of enterprises’ core staff. There are many reasons that cause the loss of core staff, including the development scale and development prospect of the small micro enterprise, and the related human resource decisions. Therefore, this paper is devoted to the study of factors that affect satisfaction of core staff in small and micro enterprises, and explores what factor plays a key role in improving the core employee satisfaction. The characteristic of this paper is to evaluate the satisfaction degree by combining the method of entropy weight method with grey relational analysis, and to establish the corresponding model. The model can reduce the influence of subjective factors, and improve the analysis accuracy of satisfaction influencing factors, thus practically provide a theoretical basis for the decision-making about human resources of small micro enterprise.
Comparative Study on Travel Agency Management System in Mainland China, Hong Kong and Taiwan  [PDF]
Ji Wen, Pingping Hou
American Journal of Industrial and Business Management (AJIBM) , 2015, DOI: 10.4236/ajibm.2015.51005
Abstract: Tourism is one of the pillar industries in Hong Kong and Taiwan; they have accumulated a set of more perfect and mature management system in travel agency and operation mechanism. The current development of China’s travel industry still has a lot of room for improvement. Referencing and learning travel agency industry management experience of Hong Kong and Taiwan will promote our tourism industry management process. The study focuses on the difference of the mainland, Hong Kong, Taiwan’s tourism management system and their respective advantages of management. Then it puts forward corresponding suggestions according to the present situation of the development of travel industry of the mainland, and provides reference for the travel industry management and the organization system innovation.

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