Rice-fish integrated farming （RFIF） can change the agricultural production pattern from mono-farming model to the co-farming model, and the stereoscopic and integrated farming system established by RFIF can change t...
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Rice-fish integrated farming （RFIF） can change the agricultural production pattern from mono-farming model to the co-farming model, and the stereoscopic and integrated farming system established by RFIF can change the flat production to the stereoscopic production. Therefore, RFIF is the important development direction for agriculture to change pattern and adjust structure. In order to further promote development of the research and application of RFIF, the general development situation of RFIF in China was reviewed; the effects of RFIF on increasing farmer income and enhancing agricultural efficiency were clarified. The technologies matched with RFIF, such as rice paddy engineering technology, safe plant protection technology, security fertilization technology, fish disease prevention and control technology and water quality management technology, were summarized, and the supporting role of RFIF for agriculture was pointed out. In addition, the development prospect of RFIF was proposed, as well as the key research direction of RFIF.
Hausdorff distance measure is one of the widely adopted feature-based image matching algo- rithms due to its simplicity and accuracy. However, it is considered that its robustness still needs to be improved. In this p...
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Hausdorff distance measure is one of the widely adopted feature-based image matching algo- rithms due to its simplicity and accuracy. However, it is considered that its robustness still needs to be improved. In this paper, various forms of original and improved Hausdorff distance （HD） and their limitations are studied. Focusing on robust Hausdorff distance （ RHD）, an improved RHD with an adaptive outlier point threshold selection method is proposed. Furthermore, another new form of the Hausdorff distance which possesses the merits of RHD and M-HD is prsented. Finally, a recur- sire algorithm is introduced to accelerate the image matching speed of Hausdorff algorithms. Exten- sive simulation and experiment results are presented to validate the feasibility of the proposed Haus- dorff distance algorithm.
Chemical investigation of the fungus Talaromyces stipitatus ATCC 10500, whose genome has been sequenced, led to the isolation of four undescribed talaroenamines B-E along with the known talaroenamine A. Their structur...
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Chemical investigation of the fungus Talaromyces stipitatus ATCC 10500, whose genome has been sequenced, led to the isolation of four undescribed talaroenamines B-E along with the known talaroenamine A. Their structures were elucidated on the basis of spectroscopic studies including mass spectrometry, extensive 2D NMR and electronic circular dichroism (ECD). Interestingly, talaroenamine A had previously been isolated from the strain of T. stipitatus Delta trop C, a strain knocked out for the gene encoding a non-heme Fe(II)-dependent dioxygenase catalyzing the oxidative ring expansion leading to the tropolone, but never from a wild-type strain. All talaroenamines were evaluated for their antiplasmodial activity and Talaroenamine D exhibited the best inhibition against the chloroquine-resistant Plasmodium falciparum (FcB1 strain) without noticeable toxicity on HeLa and preadipose cell lines. In the course of the chemical investigation of T. stipitatus, an undescribed polyester was also isolated and its absolute configuration was determined by hydrolysis and transesterification followed by gas chromatography on chiral column. (C) 2015 Elsevier Ltd. All rights reserved.
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