A study on the two typical types of american public libraries rating A study on the design of a hybrid policy for carbon abatement A study on ecological operation of web IP industrial chain A compArAtive study of countries‘ responsibilities for cArbon dioxide emission in An open economy Study on the focuS Strategy of e-commerce enterpriSe under the background of "internet+":a caSe Study of kunming ch999 Software Project Management Approaches for Global Software Development: A Systematic Mapping Study Evaluation of intelligent tourism information service capabilities:A case study of Hanzhong City Impact of human settlements quality on urban vitality based on multisource data: A case study of Shahekou District, Dalian,China A study on the innovAtion of regionAl environmentAl mAnAgement mechAnism in Beijing;tiAnjin And heBei AreA within the BAckground of ecologicAl civilizAtion Digital humanistic perspective: A study on the visualization of political network in Song Dynasty based on symbolic analysis