Results 51 to 60 of about 50,543 (184)

Based on System Dynamics Theory View Point to Discuss the Tourism Marketing Competitiveness Method and Theory —The Case of Taiwan Scenic Area of East Rift Valley and Sun Moon Lake [PDF]

open access: yes, 2015
旅游业需要雇用大量劳工才能维持服务质量且发展旅游业可带来大量就业机会,旅游亦为许多国家赚取外汇的主要来源,所以,许多国家将发展旅游业視为重要任务。在世界旅游业日益发展的同时,为了获得旅游商机,世界各地争相提升其旅游竞争力,在旅游竞争力分析中,旅游市场竞争力是旅游竞争力的一个构面与分支。提升旅游竞争力的重要目的之一是为了提升旅游目的地的营业额,因此吸引旅行者为提升旅游竞争力的重要任务。也因此,旅游目的地的旅游营销竞争力分析便是一个热门与重要且涉及许多理论与实践问题 ...
吕怡艳
core  

Development of Coupled Electrochemical Systems for Metal Resource Recovery From Aqueous Metal‐Organic Complexes

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT The past decade has witnessed a burgeoning demand of metals for global industrial development and infrastructure. Meanwhile, the depletion of mineral resources and the environmental damage caused by wastewater discharges pose significant threats to both economic and ecological sustainability. Fortunately, metal‐containing wastewaters also hold
Fei Zhang   +6 more
wiley   +1 more source

光纤光栅激光器

open access: yesGuangtongxin yanjiu, 2000
概述了光纤光栅激光器的特点及其作为光通信系统中的光源所具有的优点 ,综述了单波长、多波长光纤光栅激光器的发展情况 ...
宁提纲, 张劲松, 裴丽, 简水生
doaj  

Investigation of Chinese Teaching of Confucius Institute at Wrocław University [PDF]

open access: yes, 2016
中波一直有着深厚的传统友谊,波兰是与中国建交最早的国家之一,双方在政治、经济、文教等诸多领域的合作取得了进展。中波汉语交流的渊源可以追溯到17世纪,甚至更早。在上个世纪,波兰涌现了大批汉学家,如波兰现代汉学的奠基人夏伯龙(WitoldJabłoński)先生,他毕生发展汉语事业,培养了许多人才,为波兰早期汉学做出了重大贡献。 本世纪,国家大力发展汉语国际教育事业,孔子学院在世界各地开展得如火如荼。波兰目前成立了五所孔子学院,笔者于2014 ...
王安琪
core  

Nanofiltration Membranes for High‐Selectivity Separation of Li+ and Mg2+ From Salt Lake Brines: Strategies, Challenges, and Perspectives

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT Against the backdrop of global clean energy transition and surging demand for lithium resources, lithium extraction from salt lakes presents unprecedented development opportunities. Nanofiltration (NF) membrane technology, recognized for its efficiency, energy savings, and environmental benefits, demonstrates significant application potential ...
Wen‐Feng Li   +5 more
wiley   +1 more source

The Influence of CEO’s Characteristics on Accounting Conservatism:Evidence from Chinese Listed Company [PDF]

open access: yes, 2016
作为会计核算的重要原则之一,会计稳健性对提高企业会计信息质量及减少企业代理成本的作用不可忽视。董事长不直接管理公司,CFO是CEO意见的执行者,CEO作为公司管理团队的核心,实际控制着公司,对公司的影响力广泛而重大。因此,探讨CEO如何影响公司的会计稳健性意义重大。 本文从我国2010-2014年的沪深A股上市公司出发,采用Ball和Shivakumar(2005)的模型研究我国上市公司CEO个人特征(年龄、性别、学历、专业、持股比例、两职兼任情况)如何影响上市公司的会计稳健性。此外 ...
吴小平
core  

Recent Advances in Chemical Bath Deposition of Electron and Hole Transport Layers for Perovskite Solar Cells and Modules

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT The development of high‐efficiency, stable, and scalable perovskite solar cells/perovskite solar modules (PSCs/PSMs) highly depends on the performance and cost‐effectiveness of functional layers such as electron transport layers (ETLs) and hole transport layers (HTLs).
Baochang Wang   +11 more
wiley   +1 more source

触头材料性质对真空开关截流水平的影响

open access: yesGaoya dianqi, 1993
综述了截流产生机理,讨论了触头材料的各种参数对真空开关截流水平的影响,论述了三类真空触头材料的截流特性。
李震彪, 邹积岩, 程礼椿
doaj  

Empirical Research on the Maintenance Time of Granted Patents in the Electricity Technological Field [PDF]

open access: yes, 2016
专利的有效维持是专利价值实现的前提,专利维持时间是专利维持制度优劣的重要标志,也是反映专利制度运行绩效的关键指标。因此研究专利制度的有效性,必须以考察专利维持的实际状况入手。本文以电学类技术领域为研究对象,以美国、日本、韩国、德国、法国、中国授权发明专利数据作支撑,对电学类技术领域授权发明专利的维持时间进行论证分析,得到如下结论: 首先,电学类技术领域内授权发明专利的维持时间长短围绕各自国家授权的专利整体平均维持时间波动。美国发明专利的维持时间最长,其次是法国、日本、德国、韩国发明专利 ...
章燕
core  

MXene‐Based Materials: Compositional Engineering for High‐Performance Microwave Absorption

open access: yesRare Metals, Volume 45, Issue 3, March 2026.
ABSTRACT The rapid advancement of aerospace and electronic information technologies has imposed increasingly stringent requirements on microwave absorbing materials (MAMs), such as high absorption efficiency, lightweight, and environmental stability, making the development of advanced MAMs urgent for both civilian and national defense applications ...
Pan‐Pan Zhou   +8 more
wiley   +1 more source

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