摘要：Electrochemical CO_(2)reduction reaction(CO_(2)RR)driven by sustainable energy has emerged as an attractive route to achieve the target of carbon *** is one of the most economically viable products,and electrocatalytic CO_(2)RR to formate is a promising ***-pressure H-cell electrolyzer is easy to operate and allows high CO_(2)solubility for realizing high current density,but the design of highly efficient catalysts for working under high CO_(2)pressures remains ***-based catalysts exhibit high formate selectivity,but suffer from limited ***,we report a high-performance catalyst,which is derived from BiPO_(4)nanopolyhedrons during electrocatalytic CO_(2)RR to formate in neutral solution under high CO_(2)pressures.A high partial current density of formate(534 mA cm^(−2))and formate formation rate(9.9 mmol h^(−1) cm^(−2))with a formate Faradaic efficiency of 90%have been achieved over BiPO_(4)-derived catalyst at an applied potential of−0.81 V *** under 3.0 MPa CO_(2)*** discover that BiPO_(4)nanopolyhedrons evolve into metallic Bi nanosheets with rich grain boundaries in electrocatalytic CO_(2)RR under high CO_(2)pressures,and the grain boundaries of the BiPO_(4)-derived catalyst play a vital role in promoting electrocatalytic CO_(2)RR to *** theoretical studies reveal that the charge redistribution occurs at the grain boundaries of Bi surface,and this promotes CO_(2)activation and increases HCOO^(*)intermediate stability,thus making the pathway for CO_(2)RR to formate more selective and *** work not only demonstrates a highly efficient catalyst for CO_(2)RR to formate but also discovers a unique feature of catalyst evolution under high CO_(2)pressures.

摘要：针对客户需求向工程特性转化过程中存在的主观性、模糊性和复杂性等问题,提出了一种基于数据挖掘的客户需求数据向工程特性权重的转化方法。利用模糊层次分析法对采集到的客户需求数据进行分析,得到客户需求重要度,建立了单一客户的质量屋,获取该客户需求对应的工程特性权重。构建了多层感知器模型,挖掘客户需求数据与工程特性权重之间的关系,确定客户需求向工程特性权重之间的转化模型。最后以减速器的客户需求与工程特性的转化为例,验证了所提方法的可行性和有效性。

摘要：为打破国外番茄品种垄断,丰富云南番茄产区品种,以自主选育的12个番茄组合为试材,在云南元谋坝区露地进行秋茬品比试验,试验采用随机区组设计,对这些组合的生长性状、产量性状以及商品性状等指标进行调查。结果表明,T1421-4、T1421-5以及T1418-20 3个组合的综合性状指标优于对照品种拉比,比较适宜在云南热区种植及推广。