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This paper takes the Huangqin Reservoir irrigation area in Zhongxian County as the research object, and uses the terminal water flow calculation system to measure the water flow at the end of the canal system in the irrigation area. After calculation, the terminal water flow of the final canal system in the Huangqin Reservoir irrigation area after water-saving transformation is 0.053 per ton, which is lower than the farmers’ water tolerance of 0.355 per ton. The results show that the water flow calculated by the terminal water flow calculation system is feasible. However, in the actual implementation process, it is still necessary to continuously adjust and optimize the agricultural water reform measures to promote the development of high-efficiency water-saving agriculture.

// Shuhua Shen 1 , Tuantuan Gui 2 and Chengcheng Ma 3, 4 1 Zhejiang Provincial Hospital of Traditional Chinese Medicine, Hangzhou, China 2 Shanghai Smartquerier Biotechnology Co., Ltd, Shanghai, China 3 CAS-MPG Partner Institute for Computational Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China 4 Shanghai Center for Bioinformatics Technology, Shanghai, China Correspondence to: Chengcheng Ma, email: ccma@sibs.ac.cn Keywords: minimum-redundancy-maximum-relevance (mRMR), pancreatic cancer, biomarker Received: February 10, 2017 Accepted: April 20, 2017 Published: May 25, 2017 ABSTRACT The high mortality rate of pancreatic cancer makes it one of the most studied diseases among all cancer types. Many researches have been conducted to understand the mechanism underlying its emergence and pathogenesis of this disease. Here, by using minimum-redundancy-maximum-relevance (mRMR) method, we studied a set of transcriptome data of pancreatic cancer. As we gradually added features to achieve the most accurate classification results of Jackknife, a gene set of 9 genes was identified. They were NHS , SCML2 , LAMC2 , S100P , COL17A1 , AMIGO2 , PTPRR , KPNA7 and KCNN4 . Through STRING 2.0 protein-protein interactions (PPIs) analysis, 40 proteins were identified in the shortest paths between genes in the gene set, 30 of them passed the permutation test, which indicated they were hubs in the background network. Those genes in the protein-protein interaction network were enriched to 37 functional modules, such as: negative regulation of transcription from RNA polymerase II promoter, negative regulation of ERK1 and ERK2 cascade and BMP signaling pathway. Our study indicated new mechanism of pancreatic cancer, suggesting potential therapeutic targets for further study.

Two methods of the modification of zeolite were employed: framework element modification and surface coating, and the influence of the zeolites before and after modification on the CO2 absorption was investigated. It was found that although hydrophobicity of zeolite could be obtained by means of the surficial organic coating in the method of surface coating modification, partial channel of zeolite would be plugged, as a result, leading to the surface area reducing greatly. Distinctively, the framework element modification method could maintain not only complete lattice structure and adsorption capability of zeolite, but would also obtain a good hydrophobic property. Consequently, significant enhancement on gas absorption by this modified zeolite was achieved and up to a maximum enhancement factor of 2.62. This shows that the solid particles with good enhancement role to gas absorption need not only good adsorptive capability but also certain hydrophobicity. An unsteady heterogeneous model was employed to predict enhancement factor and the calculated results agree well with the experimental data.

A model for one-dimensional unsteady heterogeneous mass transfer was developed based on Danck-werts' surface renewal theory in order to describe the mass transfer enhancement of absorption process for a slightly soluble gas in a gas-liquid-liquid system. The model accounts for the mass transfer resistance within the dispersed phase and the effect of emulsion viscosity on mass transfer. An analytical solution for enhancement factor was obtained by Laplace domain transformation. The absorption rates of carbon dioxide in the dodecane-in-water and castor oil-in-water systems were measured in a thermostatic reactor, and the enhancement factors were calculated at different volume fractions of dispersed phase and stirrer speeds. The model predictions agree well with the experimental data.

The enhancement of chemical absorption of CO 2 by K 2 CO 3 /H 2 O absorbents in the presence of activated carbon (AC) particles was investigated. The results show that the gas absorption rates can be enhanced significantly in the presence of AC particles, and the maximum enhancement factor 3.7 was observed at low stirring intensities. The enhancement factor increased rapidly with the solid loading during the initial period of absorption and then became mild gradually to a maximum value. Both the liquid-solid contact area and the probability of solid particles residing at the gas-liquid interface decreased with the increase of the particle size, leading to a negative effect on the enhancement of mass transfer. The influence of the particles on gas absorption decreased with the reaction rate. The stirring speed changed die interfacial coverage and mass transfer rate on the liquid side and consequently affected the mass transfer between the gas and liquid phases; the enhancement factor decreased with the stirring intensity. A heterogeneous two-zone model was proposed for predicting the enhancement factor and the calculated results agreed well with the experimental data.