Facial Expression Recognition Based on Spatial and Channel Attention Mechanisms

Wireless Personal Communications - Microarray-based gene expression profiling is an emerging method to predict, classify, diagnose and to treat cancer efficiently. The characteristics of this...     

小份量,大用途——纳米纤维在非织造产业中的应用

在第十四届非织造展览会上,Elmarco公司展示了其专利Nanospider(纳米纺丝)技术与非织造材料复合的生产工艺和设计。通过分析Nanospider技术与传统静电纺的区别,分析介绍了纳米/非织造复合材料的生产工艺及产品性能,并探讨了Nanospider技术与非织造生产工艺结合的现状和发展前景。     

Lignin Interaction with Cellulase during Enzymatic Hydrolysis

The conversion of lignocellulosic biomass into biofuels or biochemicals typically involves a pretreatment process followed by the enzyme-catalyzed hydrolysis of cellulose and hemicellulose components to fermentable sugars. Many factors can contribute to the recalcitrance of biomass, e.g., the lignin content and structure, crystallinity of cellulose, degree of fiber polymerization, and hemicellulose content, among others. However, nonproductive binding between cellulase and lignin is the factor with the greatest impact on enzymatic hydrolysis. To reduce the nonproductive adsorption of enzymes on lignin and improve the efficiency of enzymatic hydrolysis, this review comprehensively summarized the progress that has been made in understanding the interactions between lignin and enzymes. Firstly, the effects of pretreatment techniques on lignin content and enzymatic hydrolysis were reviewed. The effects of lignin content and functional groups on enzymatic hydrolysis were then summarized. Methods for the preparation and characterization of lignin films were assessed. Finally, the methods applied to characterize the interactions between lignin and cellulase were reviewed, and methods for decreasing the nonproductive binding of enzymes to lignin were discussed. This review provides an overview of the current understanding of how lignin hinders the enzymatic hydrolysis of lignocellulosic biomass, and provides a theoretical basis for the development of more economical and effective methods and additives to reduce the interaction of lignin and enzymes to improve the efficiency of enzymatic hydrolysis.     

应力法剪切下料的若干问题

在断裂设计原理的基础上,提出了应力法剪切下料概念,并进行了实验研究。本文论述了应力法剪切下料的基本概念;探讨了应力法剪切下料的特点,确定了影响剪切质量的几个因素的适宜参数、剪刃形式及几何角度。这项技术既为精密下料拓宽了道路,又为裂纹技术增加了新的研究内容。     

Study on the Effect of Two-Dimensional Helicopter V-buoy’s Way of Water Entry on Water Impact

To analyze the effect of the way of water entry on water impact, the FLUENT software was adopted to simulate a two-dimensional(2D) helicopter V-buoy's free fall and forced fall at a constant velocity. Combining with the UDF program and the dynamic mesh model, the standard k-ε turbulence model was used and the VOF technique was adopted to capture free surface. The physical parameters such as velocity and force were calculated and compared with those results of boundary element method with good agreement obtained. It was found that the force of 2D V-buoy at a constant velocity was much greater than that in free fall motion. Meanwhile, the maximum pressure coefficients C_(pmax) in both cases were almost equal and the dimensionless water-entry depths y' corresponding to C_(pmax) were also similar.     

注水井纳米降压增注工艺的应用与认识

针对低渗、特低渗油藏注水井注水困难的问题,选用经化学改性、表面含有可与硅羟基结合的有机官能团的纳米聚硅材料,通过室内工艺评价及现场工艺应用,取得了单井视吸水指数平均增加593.37%、增注2359.3m3的良好降压增注效果。     

裂解汽油加氢装置脱壬烷系统改造

介绍了盘锦乙烯有限责任公司裂解汽油加氢装置脱壬烷系统改造实施的原因及改造效果。在实施改造前,脱壬烷系统的C9产品中含有34%的甲苯和二甲苯。为了回收这部分混合苯,该厂在2004年8月对脱壬烷系统进行了改造。改造后,提高了混合苯收率,解决了在C9产品中混合苯损失的难题。     

纸基·复合基覆铜箔板常态及受热后的翘曲测试方法的试用

概述了一种纸基·复合基覆铜箔板常态及受热后的翘曲测试方法及试用情况。     

依达拉奉治疗急性脑出血疗效观察

目的探讨依达拉奉治疗急性脑出血的临床疗效。方法选取我院2006年3月至2009年7月收治的60例急性脑出血患者的临床资料,随机分为治疗组(30例)和对照组(30例),治疗组患者应用常规治疗,对照组在常规治疗的基础上加用依达拉奉,连续治疗2周,在治疗前后对患者进行神经功能评分,疗效评定和超敏C反应蛋白(HsCRP)浓度测定。结果治疗组患者神经功能评分明显优于对照组患者,2组患者疗效比较差异有统计学意义(P<0.05)。治疗组患者恢复疗效优于对照组患者。治疗组超敏C反应蛋白浓度低于对照组患者。结论依达拉奉治疗急性脑出血能明显改善患者的临床症状,减轻患者的炎性反应,降低患者的神经功能损伤程度,疗效满意值得在临床推广。     

铁矿充填剩余空区地表建筑建设适宜性评价方法

为了评价张马屯铁矿采空区充填剩余空区地表建设的适宜性,通过现场实测、理论分析和经验类比相结合的研究方法,分析了小片采空区、连片采空区和上下两层采空区3种不同类型充填剩余空区的顶板 稳定性,划分了地表不同程度残余变形区域,研究了建筑物载荷影响深度与覆岩破坏高度的相对关系,分析了地表监测点沉降特征,评价了建筑建设适宜性,并提出了建设场地安全保障措施。研究表明：张马屯铁矿 剩余空区顶板稳定,不会发生大面积塌陷,建设场地地表75.8%区域内建筑受到I级轻微损坏变形,15.6%区域内建筑受到Ⅱ级轻度损坏变形,危险程度较低,地表新增360 kPa建筑荷载对剩余空区稳定性无影响,地表 整体沉降较小,剩余空区稳定性较好,建设场地进行工程建设（建筑高度36 m以下）的适宜性较好。