基于改进最小叉熵法的区域综合能源系统经济效益评估

区域综合能源系统（regional integrated energy system,RIES）作为一种可充分利用多种能源的有效网络形式,其组成方案的经济效益评估意义重大。文章首先分析了RIES的架构,搭建了RIES经济性评价指标体系。为提高指标权重融合的合理性,本文提出可反映主客观权重内在联系的改进最小叉熵法;并结合优劣解距离法（Technique for order preference by similarity to ideal solution,TOPSIS）和秩和比法（Rank-sum ratio,RSR）,进行RIES投资方案的多准则评价排序并选出最优方案。最后,选取某工业园区不同系统组成方案作为算例进行经济效益评估验证,结果证明了该方法的工程实用性,对RIES规划、改造等项目的经济效益评价具有一定的参考价值。     

卫星激光辅助光学影像立体测绘评估与分析

卫星激光辅助光学影像进行立体测绘是提高无控制测图精度的重要手段。针对美国ICEsat 1和我国高分七号、资源三号03星在轨激光测高载荷,本文从激光辅助光学影像提升高程精度的需求出发,采用激光与立体影像平高分离的区域网平差方法,对比和分析三颗卫星激光用于复合测绘的精度。试验选取天津同一地区的资源三号03星传感器校正立体影像和三颗卫星激光数据,利用15个外业检查点进行精度验证。试验结果显示,利用6～10个ICEsat 1、高分七号、资源三号03星激光点辅助光学立体影像平差后,立体影像定位高程精度分别由原始的464m提升到251m、24m、348m,充分表明,三颗卫星激光数据均可用于进一步提高立体影像高程精度,GF 7卫星激光辅助定位高程精度效果略优于ICEsat 1,ZY3 03星次之。     

Magnetically coupled oscillators applicable to high-sensitivity mass detection

Microsystem Technologies - In this paper, a system of magnetically coupled oscillators consisting of a Π-shaped horizontal cantilever and a rectangular vertical cantilever with a frequency...     

Distributed algorithm for mixed equilibrium problems with event-triggered strategy

Neural Computing and Applications - A new iterative method based on the event-triggered strategy for finding a solution to a mixed equilibrium problem (MEP) is introduced in this paper. The target...     

针对复杂多环网络拓扑的路由改进算法

网络运营商为用户提供的光纤接入主干网大多以环型网络的方式提供服务,然而目前对于大规模、环数众多、连接方式多样化的复杂多环网络缺乏性能优良的路由算法。为解决传统环网结构网络延迟高和传输效率低的问题,提出一种针对复杂多环网络拓扑的路由改进算法,将多环网络中的复杂路由问题转化为单环网中的简单路由问题。在此基础上,通过设计源溯节点还原以及路径还原算法,将单一环网改进为增强环网网络结构,使同一环内通信节点间的路径还原为完整最短路径,并从理论上证明该算法得到的最优路径是无差错的。实验结果表明,相比于现有的优化Dijkstra算法,该算法的搜索空间比提升约13%,具有更好的改进效果,且算法运行时间缩短79%,更适合复杂多环网络的路由计算。     

关于食品添加剂二氧化碳中氰化氢测定方法的问题探究

为了能顺利测定食品添加剂二氧化碳中氰化氢的含量,以GBZ/T 160.29—2004《工作场所有毒物质测定无机含氮化合物》为依据,对GB 1886.228—2016食品添加剂二氧化碳中氰化氢的测定方法进行了探究。     

我国细菌耐药问题的现状和防控策略

细菌耐药危机日趋严峻,已经成为全球范围内的重大公共安全问题,严重危害人类、动物的健康和生态环境。本文总结了我国各领域细菌耐药问题的现状,分析了加剧细菌耐药性的直接原因,揭示了细菌耐药问题对国民健康、食品安全、生态环境、经济发展等可能造成的危害,整理了我国目前开展的防控行动以及取得的主要成果,最后针对我国细菌耐药防控在耐药监测、抗生素监管、危害风险评估、人才队伍建设等方面的不足,提出了多领域合作、多部门联防联控的细菌耐药防控策略。     

Cleanable Air Filter Transferring Moisture and Effectively Capturing PM2.5

The lethal danger of particulate matter (PM) pollution on health leads to the development of challenging individual protection materials that should ideally exhibit a high PM_2.5 purification efficiency, low air resistance, an important moisture‐vapor transmission rate (MVTR), and an easy‐to‐clean property. Herein, a cleanable air filter able to rapidly transfer moisture and efficiently capture PM_2.5 is designed by electrospinning superhydrophilic polyacrylonitrile/silicon‐dioxide fibers as the adsorption–desorption vector for moisture‐vapor, and hydrophobic polyvinylidene fluoride fibers as the repellent components to avoid the formation of capillary water under high humidity. The desorption rate of water molecules increases from 10 to 18 mg min^?1, while the diameters of polyacrylonitrile fibers reduce from 1.02 to 0.14 µm. Significantly, by introducing the hydroxyl on the surface of polyacrylonitrile nanofibers, rapid adsorption–desorption of the water molecules is observed. Moreover, by constructing a hydrophobic to super‐hydrophilic gradient structure, the MVTR increases from 10 346 to 14 066 g m^?2 d^?1. Interestingly, the prepared fibrous membranes is easy to clean. More importantly, benefiting from enhanced slip effect, the resultant fibrous membranes presented a low air resistance of 86 Pa. A field test in Shanghai shows that the air filter maintains stable PM_2.5 purification efficiency of 99.99% at high MVTR during haze event.