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Search Results: 1 - 10 of 59190 matches for " Yali Yang "
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Development of Used Car Market in China  [PDF]
Yali Yang, Hao Chen, Ruoping Zhang
Modern Economy (ME) , 2013, DOI: 10.4236/me.2013.46048

Although still in its early development phase, rapid growth of auto ownership has also injected new vitality for used car market in China. Under the support of series policy, the used car market reveals leaping development character with qualified changes. It is essential to understand the new changes in the used car market. This paper conducted research on the new features of used car market in China to promote its development. Environment analysis showed that used car market will be strongly enhanced by the blooming of auto market, rapid GDP growth and policy support, which experienced steady trade scale increase and structure optimization. The used car trade experienced steady trade scale increase and structure optimization. Along with the purchasing pattern changing, significant expansion of the secondhand car market is imminent, even with hinder issues such as lack of integrity, evaluation criteria and after-service system, and incomplete policy and regulation. Several new features were identified, strong policy support, enlarging market scale and irradiation loop, remarkable concentration increase, increased status of brand used car, and enhanced trading service platform establishment. It is indicated that China’s used car market is making the shift from subordinate position to one of the dominant positions in auto industry, which is expected into a high speed, up-going development passage in the future.

Thoughts on Course Construction of “New Energy Vehicle Lightweight Technology”  [PDF]
Yongfang Li, Yali Yang
Open Access Library Journal (OALib Journal) , 2019, DOI: 10.4236/oalib.1105597
Based on the current situation that the course “New Energy Vehicle Light-weight Technology” is a new professional course, this paper expounds the construction objectives, theoretical teaching content and practical teaching content of the course, and also puts forward some teaching methods and means to improve the teaching effect of the course.
The Planar Ramsey Numbers PR (K4-e, Kl)  [PDF]
Yongqi Sun, Yali Wu, Rui Zhang, Yuansheng Yang
American Journal of Computational Mathematics (AJCM) , 2013, DOI: 10.4236/ajcm.2013.33B009

The planar Ramsey number PR (H1, H2) is the smallest integer n such that any planar graph on n vertices contains a copy of H1 or its complement contains a copy of H2. It is known that the Ramsey number R(K4 -e, K6) = 21, and the planar Ramsey numbers PR(K4 - e, Kl) for l ≤ 5 are known. In this paper, we give the lower bounds on PR (K4 ? e, Kl) and determine the exact value of PR (K4 - e, K6).

Benthic Bacteria Community Changes in Responses to Different Organic Resources from Macrophyte- and Algae-Dominated Areas of Lake Taihu, China  [PDF]
Yali Tang, Dongmei Chen, Xiaoqin Yang, Ruohua Xu
Advances in Microbiology (AiM) , 2016, DOI: 10.4236/aim.2016.614097
Carbon resources play an important role in affecting the benthic bacterial community in shallow lakes. In this study, pyrosequencing was applied to compare bacteria phylogenic profile in incubated sediments with normal and exchanged organic detritus in macrophyte-dominated East Lake Taihu and algal-dominated Meiliang Bay. We observed significant bacteria species variations in sediments from two bays, regardless of treatments. RDA (Redundancy Analysis) analysis showed that sediment characteristics, especially concentrations of total nitrogen might account for this differentiation. Besides, algal-dominated Meiliang Bay sediment with addition of Vallisneria detritus exhibited higher bacterial species variations than the sediment amended with Microcystis detritus. To the contrary, sediments from macrophyte-dominated East Lake Taihu shared similar bacteria profile at all taxonomic levels and grouped together in MDS (multidimensional scaling) plots over the treatments with Vallisneria or Microcystis detritus addition into the sediment. We speculated that the different degradability of macrophyte detritus and algal detritus led to varied bacterial responses to exchanged organic resources and ultimately, the amounts, nutrient availability and degradability of organic resources may be main reasons for benthic bacteria community structure differentiation between the two states in shallow lakes.
Safety characteristics of Li-ion batteries evaluated byin situ measurement techniques
Li Yang,Baofeng Wang,Yali Qiu
Chinese Science Bulletin , 2005, DOI: 10.1007/BF03183648
Abstract: Li-ion batteries hold an important place in the field of high power batteries because of their high open circuit voltage and associated high energy density. However, the safety is less satisfactory; therefore, the study of the factors that affect the safety of Li-ion batteries has much meaning to the safety design. In this paper, a set of apparatus was developed forin situ measurements, and several commercial materials including electrolyte, separator and electrode materials for Li-ion batteries were investigated by thein situ method. The results showed: 1) The electrolyte vapor pressure is influenced significantly by the component with low boiling point and increases rapidly with the increasing of temperature; 2) the shutdown of separator occurs at around 135°C and the impedance increases approximately by two orders of magnitude; 3) carbon anode materials affect the most the volume changes of the cell, and the change for a graphite anode is much greater than that of a glassy carbon anode.
Nonindustrial Family Forest Landowners' Stated Willingness-to-Participate in Forest Cooperatives in Southern China
Lifei Yang,Yali Wen,Francisco X. Aguilar
International Journal of Forestry Research , 2013, DOI: 10.1155/2013/983168
Abstract: Forest landowner cooperatives have emerged as a formal institution capable of fostering professional forest management. There are many reasons to motivate participation in forest cooperatives. For instance, cooperatives could ease nonindustrial family forest landowners (NIFFLs) access to financial assistance and enhance market entrance opportunities. In China, various forms of forest cooperatives supported by government agencies are developing rapidly in an effort to facilitate forest management at a large scale. However, the development of forest cooperatives is still in its early stages. An understanding of NIFFLs' attitudes towards the development of cooperatives is instrumental for crafting policies and organizational structures that motivate landowners' participation. Three hundred and ten NIFFLs from Fujian and Jiangxi provinces in Southern China were interviewed to elicit their attitudes and willingness-to-participate in forest cooperatives. Logistic regression was used to evaluate landowner, household, forest resource, and institutional factors associated with NIFFLs' stated decision to participate in a forest cooperative. Results show that NIFFLs' stated willingness-to-participate in forest cooperatives was associated with demographic characteristics like education, forest-related income, size of forestland, and attitudes toward land tenure reform and cooperatives. This paper outlines suggestions on how to further develop forest cooperatives in Southern China. 1. Introduction The Chinese central government has promoted a collective forestland reform since the 1980s in an effort to improve productivity, fight rural poverty, and raise living standards [1–3]. The term “collective forest tenure reform” refers to a public policy where forest property rights are reallocated from collectives to individual households with, among others, the objective to help individual households increase private ownership and forest management. The reform is deemed an important step towards shifting land ownership to the private sector [4]. Intrinsic to the land tenure reform, central and local governments have followed with the reallocation of tenure rights of forests to individuals [5, 6]. China’s land tenure system has significantly changed the ownership structure in rural areas. The central government first targeted agricultural lands in 1978 and implement eda household-level production responsibility system [7]. Nearly 98% of collectively-owned agricultural land had become part of household responsibility system land by 1983 [8]. Similar to the agricultural
Study on the Problems in Special-Contracted Teachers’ Professional Development  [PDF]
Yali Zhang
Creative Education (CE) , 2015, DOI: 10.4236/ce.2015.614164
Abstract: Special-contracted teachers’ scheme, conducted by the central government, is a policy which aims to supply teachers for compulsory education in western China. A large number of special-contracted teachers are recruited in Guizhou province. Research method of investigation is used in this study. The purpose is finding the problems of professional development of special-contracted teachers and looking for the suggestions for the professional development of special-contracted teachers.
Can Supervisor Support Mitigate the Impact of Colleague Exclusion on Silence Behavior?—A Moderated Mediating Model  [PDF]
Yali Chen
Open Journal of Social Sciences (JSS) , 2018, DOI: 10.4236/jss.2018.610011
Abstract: In this study, we explored the generation and influence mechanism of employees’ silence behavior from the perspectives of different relationship with colleagues and leaders. A questionnaire survey was conducted among 226 employees to investigate the possibility of employees’ silence behavior in organizational situations. The results of regression analysis show that: 1) Colleagues’ exclusion has a significant positive effect on employees’ silence behavior; 2) Psychological security has a significant negative effect on employee silence behavior, and psychological security plays a part mediating role between colleagues exclusion and silence behavior; 3) Supervisor support has a significant negative moderating effect on the relationship between colleague exclusion and psychological security.
Thermodynamic Calculation of Si_3N_4-SiC Phase Equilibrium
Yali LI,Zhuangqi HU Yang GAO,Yong LIANG,

材料科学技术学报 , 1995,
Abstract: SisN4 and SiC phase stability via gas phase reactions among SiO, CO/CO2 and N2 has been calculated based on thermochemical equilibrium. The influences of carbon activity (αC), and the partial pressure of SiO (PSiO), CO (PCO) and N2 (PN2) on the Si3N4-SiC stability have been studied and the related phase diagrams have been constructed. Result shows that the lowering αC and PCO/PSiO ratio and the increasing PN2 greatly elevate the Si3N4-SiC equilibrium temperature. Some previously observed experimental results related to Si3N4 and SiC formation at different temperature from the gas phase reactions have been discussed and some guides for sintering and synthesis Of the Si3N4 materials have been proposed
Risk of Bias Tool in Systematic Reviews/Meta-Analyses of Acupuncture in Chinese Journals
Yali Liu,Shengping Yang,Junjie Dai,Yongteng Xu,Rui Zhang,Huaili Jiang,Xianxia Yan,Kehu Yang
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0028130
Abstract: Use of a risk of bias (ROB) tool has been encouraged and advocated to reviewers writing systematic reviews (SRs) and meta-analyses (MAs). Selective outcome reporting and other sources of bias are included in the Cochrane ROB tool. It is important to know how this specific tool for assessing ROB has been applied since its release. Our objectives were to evaluate whether and to what extent the new Cochrane ROB tool has been used in Chinese journal papers of acupuncture.
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