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Search Results: 1 - 10 of 6509 matches for " Tuanhui Bai "
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Contrasting Drought Tolerance in Two Apple Cultivars Associated with Difference in Leaf Morphology and Anatomy  [PDF]
Tuanhui Bai, Zhanying Li, Chunhui Song, Shangwei Song, Jian Jiao, Yuchen Liu, Zhidan Dong, Xianbo Zheng
American Journal of Plant Sciences (AJPS) , 2019, DOI: 10.4236/ajps.2019.105051
Abstract: Apple is one of the most important fruit trees in temperate zones, and is cultivated widely throughout the world. Drought stress affects the normal growth of apple tree, and further affects fruit yield and quality. The present study examined the effects of drought on photosynthesis and water use efficiency (WUE) of two apple cultivars (Honeycrisp and Yanfu 3) that differ in drought tolerance. The results showed that the photosynthetic rate decreased in response to drought stress for both cultivars, with significant differences in intensity. Values for net photosynthetic rate (Pn) in stressed Yanfu 3 remained significantly lower than in the controls, while, for Honeycrisp, only a slight drop in photosynthesis. Similarly, stomatal conductance (Gs), intercellular CO2 concentration (Ci), transpiration rate (Tr) were markedly reduced in Yanfu 3 under drought stress. However, Honeycrisp showed only minor changes. Under drought stress, the contents of Chl a, Chl b and Chl t in Yanfu 3 were all decreased significantly compared with the control. However, little difference in Honeycrisp was noted between stressed plants and controls. Values for WUE in stressed Yanfu 3 remained higher than in the controls from day 3 until the end of the experiment, while no significant difference was observed in Honeycrisp. Furthermore, Honeycrisp also exhibited superior physiological traits, as indicated by its anatomical and morphological characteristics. Therefore, we conclude that the superior drought tolerance of Honeycrisp was due to its anatomical and morphological characteristics, which possibly contributed to the maintenance of higher photosynthetic capacity than Yanfu 3.
Foxm1 Mediates LIF/Stat3-Dependent Self-Renewal in Mouse Embryonic Stem Cells and Is Essential for the Generation of Induced Pluripotent Stem Cells
Guixiang Tan, Liang Cheng, Tuanhui Chen, Li Yu, Yongjun Tan
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0092304
Abstract: Activation of signal transducer and activator of transcription 3 (Stat3) by leukemia inhibitory factor (LIF) is required for maintaining self-renewal and pluripotency of mouse embryonic stem cells (mESCs). Here, we have confirmed transcription factor Forkhead Box m1 (Foxm1) as a LIF/Stat3 downstream target that mediates LIF/Stat3-dependent mESC self-renewal. The expression of Foxm1 relies on LIF signaling and is stimulated by Stat3 directly in mESCs. The knockdown of Foxm1 results in the loss of mESC pluripotency in the presence of LIF, and the overexpression of Foxm1 alone maintains mESC pluripotency in the absence of LIF and feeder layers, indicating that Foxm1 is a mediator of LIF/Stat3-dependent maintenance of pluripotency in mESCs. Furthermore, the inhibition of Foxm1 expression prevents the reprogramming of mouse embryonic fibroblasts to induced pluripotent stem cells (iPSCs), suggesting that Foxm1 is essential for the reprogramming of somatic cells into iPSCs. Our results reveal an essential function of Foxm1 in the LIF/Stat3-mediated mESC self-renewal and the generation of iPSCs.
Evaluation Indexes of Degree of Closeness between Strategy and Project Portfolio Allocation  [PDF]
Libiao Bai, Sijun Bai
American Journal of Operations Research (AJOR) , 2015, DOI: 10.4236/ajor.2015.51004
Abstract: The main activities in project portfolio allocation management are selecting the right project components given a strategy. It is crucial to establish a scientific system of evaluation indexes to guarantee the closeness between strategy and project portfolio allocation optimally. With organizations growing in sizes, the functions and objectives of project components are becoming more and more different. It is necessary to set evaluation indexes of the degree of closeness from the perspectives of financial, market share, social effects, and so on according to the strategy-oriented process of project portfolio allocation. This paper proposes a project portfolio allocation process under strategic orientation and evaluation indexes of the degree of closeness between strategy and project portfolio allocation. This will help projects managers make portfolio allocation decisions.
Tunable Single-Negative Metamaterials Based on Microstrip Transmission Line with Varactor Diodes Loading
Tuanhui Feng;Yunhui Li;Haitao Jiang;Wenxin Li;Fei Yang;Xinping Dong;Hong Chen
PIER , 2011, DOI: 10.2528/PIER11052203
Abstract: In this paper, tunable single-negative (TSNG) metamaterials based on microstrip with varactor diodes loading are investigated. By tuning the external voltage, our structure can provide either an epsilon-negative or a mu-negative band gap, with varying gap width (the ratio of bandwidth to center frequency can be from 0 to over 100%) and depth (from 0 dB to about -30 dB). Moreover, the tunneling mode in a heterostructure constructed by epsilon-negative and TSNG metamaterials is also studied. The results show that its transmission, Q-factor, and electromagnetic localization can also be controlled conveniently. All these properties make our structure promising to be utilized as a practical switching device, or a suitable platform for the study of nonlinear effect in metamaterials.
Consolidation Solutions of a Saturated Porothermoelastic Hollow Cylinder with Infinite Length  [PDF]
B. BAI
Engineering (ENG) , 2010, DOI: 10.4236/eng.2010.21005
Abstract: An analytical method is derived for the thermal consolidation of a saturated, porous, hollow cylinder with infinite length. The solutions in Laplace transform space are first obtained and then numerically inverted by Stehfest method. Two cases of boundary conditions are considered. First, variable thermal loadings are applied on the inner and outer pervious lateral surfaces of the hollow cylinder, and a variable mechanical loading with time is applied on the outer surface; while the displacement of the inner surface remains fixed. Secondly, variable thermal and mechanical loading are applied on the outer pervious surface, and the inner surface remains fixed, impervious and insulated. As two special problems, a solid cylinder with infinite length and a cylindrical cavity in a half-space body are also discussed. Finally, the evolutions of temperature, pore pressure and displacement with time along radial direction are analyzed by a numerical example.
A Public Value Based Framework for Evaluating the Performance of e-Government in China  [PDF]
Wenlin Bai
iBusiness (IB) , 2013, DOI: 10.4236/ib.2013.53B006
Abstract:

Much research has been done on evaluating the performance of e-government in China, but comprehensive pictures of research done on evaluation of performance of e-government can hardly be found in the Chinese literature. Besides, there are few theories to support the research and practice in evaluation. By analyzing existed literature, the paper proposes a conceptual framework for evaluating performance of e-government based on public value perspective. Delivery of public services, effectiveness of public organization and development of trust are identified and selected as three basic public values for analysis.

A Cultural Examination of Shapiro’s Translation of the Marsh Heroes’ Nicknames  [PDF]
Yanli Bai
Advances in Literary Study (ALS) , 2016, DOI: 10.4236/als.2016.43006
Abstract: What roles the culture plays in translating has been a focus in the translating circle. The stratifica-tional relation of language to cultural context in Systemic Functional Linguistics (SFL) makes it necessary that the process of translation should take the cultural factors into consideration. The present paper aims to discuss the parts that culture plays in translating by analyzing some prob-lems in Shapiro’s translation of the nicknames in the Outlaws of the Marsh. The paper starts off from the relation of language to culture context in translation in an SFL angle, followed with a brief introduction to the connotation and the artistic magic of the Marsh Heroes’ Nicknames and some examples of Shapiro’s translations of the nicknames, in order to demonstrate the importance of culture factors in translating.
Syntactic Ambiguity Resolution of Cantonese-English Bilinguals: Evidence from Prepositional Phrase and Adverb  [PDF]
Bing Bai
Open Journal of Modern Linguistics (OJML) , 2018, DOI: 10.4236/ojml.2018.83005
Abstract: Syntactic ambiguity resolution is influenced by multiple constraints. A sentence-picture matching task tested the attachment of prepositional phrase (PP) such as on the chair within an utterance like Mary ate the apple on the chair. PP attaching to NP2 (the apple) is called low attachment (LA), while PP attaching to V (ate) is called high attachment (HA). A comprehension task tested the attachment of adverb such as quickly within an utterance like the story Mary was reading quickly put her little sister into sleep. The checked adverbs attaching to the verb of the embedded clause (VEC) and to the verb of the main clause (VMC) were analyzed. Cantonese-English bilinguals were grouped according to their L2 proficiency. Results reflected that 1) both groups showed preference to HA for PP, 2) LP group showed preference to VMC for adverb attachment; 3) there is a large gap in LA between LP and HP, suggesting that syntactic ambiguity resolution involves interaction of all the information available. The relationship between language proficiency and parsing is not so definitely supported by the results.
Optimality for Henig Proper Efficiency in Vector Optimization Involving Dini Set-Valued Directional Derivatives  [PDF]
Guolin Yu, Huaipeng Bai
Applied Mathematics (AM) , 2011, DOI: 10.4236/am.2011.27126
Abstract: This note studies the optimality conditions of vector optimization problems involving generalized convexity in locally convex spaces. Based upon the concept of Dini set-valued directional derivatives, the necessary and sufficient optimality conditions are established for Henig proper and strong minimal solutions respectively in generalized preinvex vector optimization problems.
Analysis of Noise under Regime Switching  [PDF]
Ling Bai, Xiaoyue Li
Applied Mathematics (AM) , 2011, DOI: 10.4236/am.2011.27112
Abstract: In this paper we consider a stochastic nonlinear system under regime switching. Given a system x(t)=f(x(t),r(t),t) in which f satisfies so-called one-side polynomial growth condition. We introduce two Brownian noise feedbacks and stochastically perturb this system into dx(t)=(x(t),r(t),t)dt+ σ (r(t))|x(t)|βx(t)dW1(t)+q(r(t))x(t)dW2(t) . It can be proved that appropriate noise intensity may suppress the potentially explode in a finite time and ensure that this system is almost surely exponentially stable although the corresponding system without Brownian noise perturbation may be unstable system.
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