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Rare‐earth (RE) chalcogenides have been extensively studied as infrared nonlinear optical (NLO) materials because of their nice integrated performances; however, very few RE chalcophosphates are involved for this topic. Here, three quaternary RE selenophosphates, KSmP2Se6 (1), KGdP2Se6 (2), and KTbP2Se6 (3), are profoundly studied for their NLO potentials. Their noncentrosymmetric P21 structures feature...
Distribution is an important part to connect directly to the consumer in logistics system, optimizing the distribution system, can improve the logistics cost, and make logistics scientific,so optimization of distribution system is particularly important. For the optimization of distribution system,the optimization of vehicle scheduling is a key link. First of all,this article analyzes the vehicle...
The analysis of traditional road logistics mode and existing problems in constructing information platform have brought about the design method of building a national road logistics information platform. With the Internet as the main vector, and combined with computers, communications and positioning technologies, this SMS-system based platform was finally established. It is comprised with four parts...
This paper intend to present a approach for multi-regional logistics planning, the presented approach is a combination algorithm, which is combinated by two traditional methodology-principle component analysis (PCA) and cluster analysis. Basing on the relevant data of logistics development, the evaluation and classification about comprehensive level of logistics development in different regions can...
Network convective distribution model is primarily used to solve the logistics distribution problem with high service quality. The article bases on the idea of convective transportation and expands the distribution model from single line convective distribution mode to network convective distribution mode. Introduce an integrated judging index, and construct a logistics distribution model based on...
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