工程岩体断裂构造发育程度的定量评价研究IAEG信息(会讯)

岩体断裂构造发育程度及其均匀性是影响岩体结构类型、岩体质量优劣及岩体稳定性分析以及工程岩体综合分区利用的重要因素, 因此岩体断裂构造发育程度的定量评价具有重要的工程意义。本文以三峡工程永久船闸边坡工程为例, 系统地讨论了工程岩体断裂构造发育程度的评价方法、定量评价指标的确定原则、断裂构造发育程度的分级标准等。研究表明, 根据岩体断裂构造发育特点, 综合运用多层次模糊综合评判法和人工神经网络技术是评价工程岩体断裂构造发育程度的有效方法。     

Optimization and evaluation of fish oil microcapsules

Fish oil microcapsules were prepared using two natural polysaccharides, alginate and chitosan, as the wall materials. A response surface methodology (RSM) was used to optimize the conditions for fish oil encapsulation efficiency (FOEE). The FOEE was investigated with respect to three key-variables in the RSM: ratio of inner oil phase to aqueous phase (X₁, w/w); concentration of the aqueous phase (X₂, wt%); and ratio of the aqueous phase to outer oil phase (X₃, v/v). The optimal formulation obtained from the RSM model, i.e., 2.7:1 (X₁), 1.6 wt% (X₂), and 11.5:1 (X₃), gave a FOEE of 28%. The model was validated and the fish oil microcapsules prepared under the optimized conditions were characterized in terms of particle size, polydispersity index (PDI), zeta potential, surface morphology, and in vitro release. The average droplet size, PDI, and zeta potential were 915 nm, 0.038, and +5.2 mV, respectively. The fish oil microcapsules were highly uniform microspheres, and had an accumulative release rate of 77.7% in 270 min in a gastrointestinal model, indicating their potential as an alternative carrier for the controlled release of fish oil. In conclusion, formulating optimal microencapsulation conditions by the RSM can be applied to the microencapsulation of various oil-soluble nutrients for food applications.     

航天发射场测试发射能力评价研究

从分析航天发射任务对发射场测发试验任务的保障需求出发,通过梳理测发试验能力的组成要素和作用机制,建立了航天发射场测试发射能力评价指标体系,采用层次分析和专家咨询相结合的方法确定各级指标的权重,并选用多级模糊综合评判模型进行了测试发射能力的评价研究。这对于提升我国航天发射场的测发试验任务保障能力,弥补日益增加的任务需求与测发能力相对不足之间的平衡,满足我国未来航天发射的任务需求具有重要的理论和实践价值。     

综合评价在统计分析中的应用

随着统计职能的不断深化,统计工作重心应向统计分析转移。以正态分布为依据的多变量标准化处理的综合评价法,在统计分析中具有广泛应用。标准化处理解决了传统分析评价之不足,将若干个评价指标赋予不同的权数,并清除了不同量纲的影响,最后通过综合分值的大小进行比较,使分析过程和结果建立在科学的、系统的基础上。     

川西民族地区工业技术进步现状及评价

本文运用道格拉斯和索洛生产函数模型,采用回归分析法测算了以凉山为代表的川西民族地区工业技术进步程度及其对地区经济增长的影响程度