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Organisms are constantly exposed to environmental stimuli and have evolved mechanisms of protection and adaptation. Various effects of nanoparticles (NPs) on crops have been described and some results confirm that NPs could enhance plant growth at the physiological and genetic levels. This study comparatively analysed the effect of carbon nanotubes (CNTs) on rice growth. The results showed that single-wall...
In this work, we propose a new genetic programming algorithm with local search strategies, named Memetic Genetic Programming(MGP), for classification problems. MGP aims to acquire a classifier with large Area Under the ROC Curve (AUC), which has been proved to be a better performance metric for traditionally used metrics (e.g., classification accuracy). Three new points are presented in our new algorithm...
This paper presents the concept of evolution ability of population and discusses the ability of finding the optimal solution for the population after one-generation selection, crossover and mutation. Based on the analysis of effect of selection, crossover and mutation on evolution ability of population, this paper presents some important conclusions. These conclusions above do not only help improve...
A bacterial strain Pseudomonas sp. Zjwp-14 was screened out from soil, and used for the biotransformation of DL-2-amino-Δ2-thiazoline-4-carbonic acid to L-cysteine. This strain was identified based on its morphological, physiological characterization, 16S rDNA sequence determination and phylogenetic analysis. The bioconversion process was optimized by examining some key factors including cell cultivation...
To improve the expression level of bacteriophage lysin of Streptococcus (PlyC), the growth conditions of the engineering strains, that confirmed by transforming the recombinant plasmids pET-32a(+)-PlyCA and pET-32a(+)-PlyCB (PlyCA and PlyCB are two genes of PlyC) which constructed in our laboratory into E. coli BL21 (DE3) were studied. Some key parameters such as isopropyl-β-D- thiogalactopyranoside...
In view of inevitable redundancies in local data sources in heterogeneous information integration systems, a multi-copy join optimization method (MuCoJo for short) based on a genetic algorithm is proposed. MuCoJo can choose appropriate redundant copies of the tables to participate a joint query and optimizes the join order of it. By using the redundant copies, MuCoJo enlarges the search space so that...
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