基于复炸油的微藻采收方法及其作用机理研究

随着现代能源发展,使用清洁、可再生的新能源逐渐成为解决环境和能源问题的主要思路。在众多新能源中,生物质能不仅可以降低温室气体排放,还具有良好的可再生特性,小球藻作为一种理想的制备生物质能,不仅生长速度快,且油脂含量高。但因其密度与水接近而导致采收困难,这也成为制约微藻产业发展的主要原因之一。以浮珠浮选法为基础,提出一种以复炸油乳化液为浮珠的浮选法用于采收小球藻,即将复炸油与纯水按照一定比例在乳化剂作用下充分乳化,并结合响应面法,筛选出影响采收率的显著因素为p H、搅拌速率和原藻体积占比;影响富集比的显著因素为pH、浮选时间和原藻体积占比;同时结合多目标优化结果得出最佳采收率和富集比分别为92.79%和2.07%。以小球藻为研究对象,获得复炸油采收微藻机理:微藻与浮珠在铝盐的作用下,通过吸附电中和及桥接作用形成聚合体;微藻与浮珠首先在搅拌提供的动能作用下相互靠近,之后在范德华力作用下发生黏附,在14.73 nm时引力作用达到临界值。在最佳采收条件下,处理成本仅为4.38元/吨,降低采收成本和能耗的同时也为复炸油再利用提供了一种新方法。

基于ROV等载体的水下搜救流程综述

随着水下机器人技术的飞速发展,水下搜寻与救捞朝着精细作业方式发展.本文将搜救流程分解为大面积声学扫描与疑似点标识、近底声学成像与疑似点辨认、坐底声学精确定位与标志物投放、目标近距离观察与挂钩救捞/海底非开挖穿缆工程与织网救捞4个阶段,综述了各阶段所采取的搜寻与救捞方法、需要的搜寻与救助工具、搜救载体,以及国内外的典型成功案例.

Two-Dimensional Ground Deformation Monitoring in Shanghai Based on SBAS and MSBAS InSAR Methods

Shanghai has experienced the greatest land subsidence in China in the past sixty years and produced undesirable environmental impact. However, horizontal ground deformation has not been understood yet. Therefore ground deformation monitoring together with the analysis of its driving forces are critical for geo-hazards early-warning, city planning and sustainable urbanization in Shanghai. In this paper, two-dimensional ground deformation monitoring was performed in Shanghai with SBAS and MSBAS InSAR methods. Twenty-nine Multi-Look Fine 6 （MF6） Radarsat-2 SLC data acquired during 2011-2013 were used to derive vertical ground deformation. Meanwhile, six descending Multi-Look Fine 6 （MF6） and four ascending Multi-Look Fine 2 （MF2） spanning April to August, 2008, were used to derive vertical and horizontal ground deformation during the observation period. The results indicate that vertical and horizontal deformations in 2008 were not homogeneously distributed in different districts ranging from 0-2 cm/year. Vertical deformation rate during 2011-2013 were decreased to less than 1 cm/year in most district of Shanghai area. Activities from groundwater exploitation and rapid urbanization are responsible for most of the ground deformation in Shanghai. Thus, future ground deformation in vertical and horizontal directions should be warranted.

POSITIVE SOLUTIONS TO HYBRID SCHR?DINGER EQUATION WITH NORMAL AND FRACTIONAL LAPLACIANS

In this paper, we study the hybrid Schrodinger equation involving normal and fractional Laplace operator, and obtain the existence of the solutions to this class of the hybrid partial differential equation. Our main argument is variational methods.

EXISTENCE RESULTS FOR FRACTIONAL FUNCTIONAL DIFFERENTIAL EQUATIONS WITH RIEMANN-LIOUVILLE DERIVATIVE

In this paper, using the contracting mapping principle and the monotone iterative method, we consider the existence of solution to the initial value problem of fractional functional differential equations with Riemann-Liouville derivative.

ALMOST PERIODIC SOLUTIONS TO STOCHASTIC FRACTIONAL PARTIAL EQUATIONS IN FRACTIONAL POWER SPACE

In this paper, we prove the existence of pth moment almost periodic mild solutions in fractional power space to a class of stochastic fractional partial equations using the techniques of contraction fixed point principle, Schauder fixed point theorem and semigroup theorem.