Oscillation Caused By Impulses

AbstractThe present paper is devoted to the investigation of the oscillation of a kind of very extensively studied second order nonlinear delay differential equations with impulses, some interesting results are obtained, which illustrate that impulses play a very important role in giving rise to the oscillations of equations

Tourism Translation in the Light of Eco-translatology and Existing Translation Theories

The aim of this paper is to introduce the concept of Eco-Translatology raised by Gengshen Hu (2013) and reveal its relationship with the following translation theories: Michael Cronin’s (2017) eco-translation, the Polysystem theory developed by Even- Zohar (1979/1990) and Toury (1995), contextual dimensions proposed by Hatim and Mason (1990), and functional approaches studied by Reiss & Vermeer (1984) and Christiane Nord (1991/2005). These different approaches are then adopted to analyze Spain's official tourism website for Cordoba in the Spanish language and its translation into Chinese. Through comparison, we find that despite the similarities, the main difference between Hu and other Western translation theories is the object of study. For Hu, it is the translator, and for the analyzed Western scholars, it is the translated text

Study of the Mechanisms of Heat Tolerance in Ivy Geraniums

Ivy geranium (Pelargonium peltatum) is a heat susceptible species with its heat tolerance varying among varieties. Reactive oxygen species (ROS) and in-vivo defense systems are related to plant heat damage and heat tolerance. Application of chelated-iron has also been reported to enhance ivy geranium heat tolerance; however, the correlation of ROS, relative enzyme stability, and iron content to differences in heat tolerance in ivy geraniums is unknown. Here we show that the H2O2 content and ROS scavenging enzyme stability in ivy geranium varies with varieties and active iron is not related to heat tolerance in ivy geranium. H2O2 content in mature leaves in both heat tolerant \u27Beach\u27 and sensitive \u27Butterfly\u27 increased under heat stress, but \u27Butterfly\u27 had a relatively greater increase of this toxic compound. Catalase (CAT) activities in young leaves in both varieties decreased. In young leaves of \u27Butterfly\u27, CAT activities decreased to a level significantly lower than that in old leaves while this did not occur in \u27Beach\u27. Superoxide dismutase (SOD) activities in \u27Butterfly\u27 young leaves were also decreased. All these phenomenon coincided with the heat tolerance differences of the two varieties. Active iron content only changed with leaf age and did not vary between varieties or treatments. Our results demonstrated that ROS scavenging ability and relative enzyme stability may indicate heat tolerance in ivy geranium and that iron deficiency was not the cause of heat damage. Cell Membrane Themostability (CMT) and Triphenyl Tetrazolium Chloride (TTC) cell viability tests are alternative, laboratory-based screening methods for screening for heat-tolerance. Both CMT and TTC tests can represent the variance in heat tolerance observed in ivy geraniums. The results of both CMT and TTC tests correlated well with plant width and growth indexes although their correlations to plant chlorosis were low. Unlike TTC, CMT strongly correlated with plant width. CMT and TTC tests are complementary laboratory-based methods that can be applied to cultivar screening for heat tolerance in ivy geraniums

Non-iterative complex wave-field reconstruction based on Kramers-Kronig relations

A new computational imaging method to reconstruct the complex wave-field is reported. Due to the existence of zero frequency component, the measured signal by amplitude modulation of pupil has a spectrum similar to the one of off-axis hologram. The mathematical analogy between them is established in this paper. Based on this observation and analyticity of band-limited signal under any diffraction-limited system, an algorithm from Kramers-Kronig (KK) relations is utilized to recover the phase information only from the intensity patterns. From the sensing side, only two measurements are required at least. From the reconstruction algorithm side, our method is iteration-free and parameter-free, also without any assumption on sample characteristics. It owns several advantages over existing phase imaging methods and could provide a unique perspective to understand current computational imaging methods

Integrating Scale in Remote Sensing and GIS

No abstract available