OALib Journal期刊

ISSN: 2333-9721



匹配條件: “Dou Yangyang” ,找到相關結果約1450條。
Effect of Variable Sulfur Supply on Thiol Compounds and Arsenic Accumulation in Kandelia Obovata (S., L.) Yong Seedlings  [PDF]
Dou Yangyang, Wu Guirong
Open Access Library PrePrints (OALib PrePrints) , 2014, DOI: 10.4236/oalib.preprints.1200091
Abstract: In the present study, Kandelia obovata (S., L.) Yong seedlings were exposed to As V(0, 30, 60 and 150 mg kg-1) under different levels of sulfur (0, 0.1, 0.2 and 0.4% (w: w)) supply. A highly significant negative correlation between arsenic concentration in leaves with sulfur treatment (r=-0.554, P<0.01) is established. Concentration of arsenic in roots proves much higher than that in leaves. The GSH concentrations in K. obovata seedlings show significantly increases (rleave=0.648, rroot=0.602; P<0.01) with increasing sulfur supply in the growth media. Arsenic induced GSH formation in leaves of K. obovata seedlings, and clearly restrained GSH formation in roots. Arsenic exposure significantly increased the synthesis of non-protein thiols (NPT). Supply of sulfur at 0.1% and 0.2% promoted the content of NPT (P<0.05), but at 0.4% sulfur there was little effect on the NPT content (P>0.05). In conclusion, an increase in sulfur supply to plants may improve their accumulation capacity for arsenic through enhanced tolerance caused by a positive effect on the thiol metabolism of the plants.
Continuous welded rail in permafrost regions deformation analysis of Qinghai-Tibet Railway

MU Hang
, DOU Yangyang

- , 2017,
Abstract: 針對青藏鐵路多年凍土區路基沉降病害條件下的無縫線路長鋼軌變形規律展開研究,在鋼軌發生豎向位移條件下,建立三維長鋼軌非線性有限元計算模型,分析路基沉降病害條件下長鋼軌節點位移分布及發展規律。研究結果表明:鋼軌豎向位移與路基下沉量在道床阻力發揮效用范圍內呈近似線性關系,當路基上拱與下沉交替時,鋼軌位移顯著增加。
The paper study about under the condition of vertical settlement of track deformation analysis. Analysis of track displacement distribution and the law of development under the condition of embankment settlement diseases based on nonlinear finite element method. Research indicates that rail vertical displacement and roadbed subsidence has the linear relationship in the range of track bed resistance to be effective. When the roadbed arch and sink alternately that will be a significant increase in rail displacement
Higher Order Iteration Schemes for Unconstrained Optimization  [PDF]
Yangyang Shi, Pingqi Pan
American Journal of Operations Research (AJOR) , 2011, DOI: 10.4236/ajor.2011.13011
Abstract: Using a predictor-corrector tactic, this paper derives new iteration schemes for unconstrained optimization. It yields a point (predictor) by some line search from the current point; then with the two points it constructs a quadratic interpolation curve to approximate some ODE trajectory; it finally determines a new point (corrector) by searching along the quadratic curve. In particular, this paper gives a global convergence analysis for schemes associated with the quasi-Newton updates. In our computational experiments, the new schemes using DFP and BFGS updates outperformed their conventional counterparts on a set of standard test problems.
Research on Certification Standards of LSQ  [PDF]
Fang Wang, Yangyang Hu
American Journal of Industrial and Business Management (AJIBM) , 2016, DOI: 10.4236/ajibm.2016.68086
Abstract: With the rapid development of the logistics industry, improving the logistics service quality (LSQ) has become the most important means to achieve the competitive advantage for many logistics enterprises. At the same time, as the international prevailing evaluation system, certifications not only are the basic means of quality management, but also the tools to promote the development of trade facilitation. This paper analyzes the connotation of LSQ, and puts forward that for promoting the development of logistics industry and improving customer satisfaction rate, the quality of logistics service should also be certified. Based on the analysis of a large number of literatures and practice, the paper puts forward the construction of LSQ certification standards. Through the analysis, it is concluded that the LSQ plays an important role in regulating the logistics market, improving the competitiveness of enterprises, improving the customer satisfaction rate and avoiding risks.
Research on Green Express Packaging Design under the Electronic Commerce  [PDF]
Fang Wang, Yangyang Hu
Open Journal of Business and Management (OJBM) , 2016, DOI: 10.4236/ojbm.2016.44063
Abstract: With the rapid development of e-commerce and continued expansion of online shopping in our country, the express business has been rapid growth. At the same time, Express Packaging will be proposed to be green, recycling and other new requirements. Based on this, this paper designs the Express Packaging in the electronic commerce environment. By analyzing the characteristics of the Express Packaging under the ecommerce environment in China, the paper designs a green logistics box and the corresponding logistics direct recycling mode to solve problems like excessive packaging, difficult to recycle, the low degree of standardization of packaging, and serious environmental pollution problems that exist in the courier package. By introducing material, construction specifications, interior decoration, specifications filler of the green logistics box and combining with direct recycling, the green logistics box can be made to best meet the needs. Through the design and research of the green express packing, we can achieve the goals including the implementation of the green packaging, reducing environmental pollution, developing a recycling economy and enhancing the overall level of express packaging e-commerce environment.
Public Health Insurance System Reform and Its Impact on Health Service Utilization in Rural China: Evidence from CHNS 2000 and 2011  [PDF]
Xinxin Ma, Yangyang Cen
Chinese Studies (ChnStd) , 2017, DOI: 10.4236/chnstd.2017.62009
Abstract: This study employs an empirical analysis to investigate the impact of the New Cooperative Medical Scheme (NCMS) on health service utilization in Chinese rural region using the 2000 and 2011 China Health and Nutrition Survey (CHNS) longitudinal survey data and Difference in Difference (DID) analysis method. The major conclusions are as follows. First, individual characteristic factors, enabling factors, health care need factors, and lifestyle factors affect health service utilization, which is consistent with Anderson model. Second, when controlled these factors based on Anderson model, the results indicate that the NCMS did not affect health service utilization (outpatient, inpatient, and health care examination) of individual when ill. Third, to consider the disparity of health care demand and supply, we also employ the analysis utilized the subsamples to take robustness checks. The results indicate that there is no difference statistically in health service utilization between the NCMS enrollment group and the non-enrollment group by age groups (16 - 49 aged group and 50 age and over group), income groups (High, Middle and Low-income groups), and regional groups (East, West and Central Regions). Therefore, it can be said that the NCMS did not improve either health service utilization for patients or preventative health care for rural residents in China.
The Effect of Soybean Trade between China and the United States on Chinese Residents’ Consumption Expenditure—Based on 2004-2016 Trade Data  [PDF]
Yangyang Qi, Quanlong Qi
Modern Economy (ME) , 2018, DOI: 10.4236/me.2018.96067

This paper uses cointegration analysis method to estimate the correlation between China’s per-capita consumption expenditure and the amount of soybean imported from the United States. It is found that importing soy from the United States can reduce China’s per capita consumption expenditure. There is a long-term equilibrium between the per capita consumption expenditure and the imports of soybean native to the United States. In the short term, one of them can have a lasting impact on the other.

Research on the Relationship between External Compensation Gap of Executives and Enterprise Innovation  [PDF]
Yangyang Gu, Zhongjun Yang
Open Journal of Social Sciences (JSS) , 2018, DOI: 10.4236/jss.2018.68022
Abstract: How to use the pay contract to encourage executives to implement innovation activities has become an important issue to be solved by the theoretical and practical circles. Based on the data of Shanghai and Shenzhen A-share listed companies from 2006 to 2015, this paper examines the impact of external compensation gap on corporate innovation, and further discusses the contextual effects of executive talent and property rights. The study finds that the external compensation gap of executives has a positive effect on enterprise innovation. Moreover, the higher talent executives possess, the more obvious the external compensation gap will promote the innovation of enterprises. In addition, compared with state-owned enterprises, the external compensation gap of non-state-owned enterprise executives has a more significant effect on corporate innovation. This paper not only expands the economic consequences of the external compensation gap, but also provides inspiration for companies to adjust the compensation structure and encourage executives to promote enterprise innovation.
Discursive Metaphors Analysis: The Love Metaphor of Plant in Chinese Love Poetry
Yangyang ZHANG
Cross-Cultural Communication , 2012, DOI: 10.3968/j.ccc.1923670020120805.2022
Abstract: A conceptual metaphor may have various meanings in different languages, and usually contains cultural background. Based on cognitive approach, this paper aims to study Chinese metaphor through analyzing four conceptual metaphors of four typical plants in traditional Chinese poetry. This article also discusses why these ancient metaphors can still be used commonly in modern Chinese language. At the same time, through analyzing these metaphors, relevant implicating Chinese cultural aspects are described. Key words: Discursive metaphor; Ancient Chinese poetry; Love; Plant
Alternating proximal gradient method for sparse nonnegative Tucker decomposition
Yangyang Xu
Mathematics , 2013,
Abstract: Multi-way data arises in many applications such as electroencephalography (EEG) classification, face recognition, text mining and hyperspectral data analysis. Tensor decomposition has been commonly used to find the hidden factors and elicit the intrinsic structures of the multi-way data. This paper considers sparse nonnegative Tucker decomposition (NTD), which is to decompose a given tensor into the product of a core tensor and several factor matrices with sparsity and nonnegativity constraints. An alternating proximal gradient method (APG) is applied to solve the problem. The algorithm is then modified to sparse NTD with missing values. Per-iteration cost of the algorithm is estimated scalable about the data size, and global convergence is established under fairly loose conditions. Numerical experiments on both synthetic and real world data demonstrate its superiority over a few state-of-the-art methods for (sparse) NTD from partial and/or full observations. The MATLAB code along with demos are accessible from the author's homepage.

Copyright ? 2008-2017 Open Access Library. All rights reserved.

广西快乐10分下载 七星彩开奖查询结果 向钱进理财平台 天天彩选4中奖规则 街机金蟾捕鱼官方版 炒股死了多少人 今天青海福彩快三直播 哈灵浙江麻将哪里下载 七乐彩所有开奖历史 河南11选5开奖结果 期货配资注意事项