数字普惠金融的减贫效应研究——基于国定扶贫县的实证分析

如何帮助经济落后地区脱贫是消除贫困的重点和难点。本文基于2015-2018年国定贫困县数据,研究了数字普惠金融在经济落后地区的减贫效应。发现数字普惠金融有利于减小该地区的贫困发生率,降低绝对贫困。机制分析发现,数字普惠金融既可以通过支持电子商务发展直接助力减贫,也可以通过涓滴效应先富带后富间接助力减贫。分维度看,数字普惠金融增加服务多样性的减贫效果优于提高数字化程度,增加服务覆盖人群的减贫效果最差;分业务看,支付业务、货币基金业务、投资业务和信贷业务的减贫效果较好,保险业务具有一定的减贫效果,信用业务的减贫效果不显著。此外,数字普惠金融在交通发达、城镇化水平高的地区减贫效果更好。

Preparation of High－purity Sodium Tungstate from Low－grade Tung－sten－concentrate with a High Content of Calcium and Other Impurities

A new technological process for production of talium tungstate from low-grade tungsten-concentrate witha high content of calcium and other impurities has been studied. The experiments showed that average tungstenleaching efficiency of more than 96. 92 % can be obtained with a low NaOH consumption by using the mechani-cal activating caustic decomposition , and the content of main impurities (P, As, Si) in Na_2WO_4 solution ob-tained is competitive with that from standard wolframite concentrate by traditional caustic decomposition. Afterrecovering caustic liquor by first crystallization, molylxlenum is removed from Na_2WO_4 solution by ion ex-change method. High-purity sodium tungstate is obtained by second crystallization of Na_2WO_4 solution. Thistechnology has the advantages of good adaptability for raw materials, high removing efficiency of impurities,high tungsten recovery and high economic benefit.

VXLAN控制层面与数据层面的优化

随着互联网的发展,SDN概念&思维部署网络开始逐步进驻行业,先进的互联网企业逐步往传统的运营商落地。SDN的好处在于更加智能,更加灵活调度资源负载。SDN和VXLAN没有太大的关系,但是从行业的发展来看,VXLAN是新兴的2层overlayer技术,SDN可以在这么灵活的架构下使用,更加方便,通过开源的架构可以不依赖传统的设备厂家,让行业发展更加健康。本文从SDN兴起去思考VXLAN的应用优化。