Visual Basic对象通信的实现与应用

针对面向对象系统中对象的交互分为调入界面和调出界面,阐述了VB调出界面的2种通信机制,即事件和回调,并对二者进行了详细比较,分析了它们的特点和适用对象,进而通过在基于异步调用的网络监控系统中的应用实例,体现了基于回调机制的对象通信技术对于设计和开发复杂的面向对象系统的重要意义。     

Sharing versus collaborative economy: how to align ICT developments and the SDGs in tourism?

Great hopes have been placed in the sharing economy to provide a new business model based on peer-to-peer (P2P) exchanges of underutilized assets. As a model, the sharing economy has been expected to make significant contributions to sustainability, providing new opportunities for entrepreneurship, more sustainable use of resources, and consumer co-operation in tight economic networks. However, in recent years, digital platforms have turned into the most important actors in the global sharing economy, turning global corporations, such as AirBnB, Booking, or TripAdvisor into intermediaries controlling and profiting from most transactions. Focused on accommodation, this paper conceptualizes the sharing economy in comparison to the wider collaborative economy, and discusses its social, economic, environmental, and political impacts in comparison to the sustainable development goals. It concludes that the sharing economy has great potential to make very significant contributions to sustainability, though the model is increasingly being replaced by the collaborative economy, which performs as an extension and acceleration of neoliberal economic practices.     

Research engagement,impact and sustainable tourism

In this editorial, we reflect on how the Journal of Sustainable Tourism can contribute towards sustainable tourism researchers achieving more impact with their research. We propose some changes that can be tested in, and introduced gradually and collaboratively with, the community of the editorial board and authors. To support impactful mind sets, we will promote research that reflects diverse academic communities. To promote impactful research topics, we will encourage authors to frame their submitted articles against the Sustainable Development Goals, while research that is time sensitive will be fast tracked so it can contribute to current debates. To promote impactful methodologies, we shall favour articles that use mixed methods and action research, and those that conduct longitudinal, experimental, and evaluative research. To promote impactful partnerships, we will favour multidisciplinary approaches and research that has been co-created with stakeholders. To promote impactful communication and dissemination, we will continue to build an online community on social media for sustainable tourism researchers, we will promote articles in social media to raise their visibility, and we will provide free access to those articles that are deemed to have the greatest potential to impact positively on society.     

邓小平政治体制改革思想的价值取向

政治体制改革是中国特色社会主义现代化建设事业的重要组成部分。对于政治体制改革,邓小平认为,建设高度的社会主义民主是其内在的价值诉求,解放和发展生产力是其最基本的价值取向,坚持人民群众的历史主体与价值主体地位是其终极的价值目标。     

我国体育彩票立法的回顾与评析

1994年开始发行体育彩票以来,体育彩票在我国的发行已经走过了十余年的历程。在这十余年中,我国的体育彩票取得了飞速发展。然而,我们在为所取得的成绩感到欣慰的同时,期间所出现的一些问题也引起了我们的反省与深思。例如,湖北省“4．20体育彩票案”、深圳体育彩票纠纷案等。当然,导致这些体育彩票案件出现的因素是多方面的,但立法的滞后显然已成为制约我国体育彩票进一步发展的最重要因素。为此,笔者通过对我国体育彩票立法的回顾与评析,期望能对我国体育彩票市场的规范、有序发展起到一定的作用。     

我国电信行业三网融合问题研究

随着信息技术和我国信息产业的发展,电信网、因特网、有线电视网的三网融合已成必然趋势.文章介绍了国外国家三网融合的经验,分析了我国三网融合的现状与存在的主要问题,提出应打破行业垄断,尽快使单一运营商向综合信息服务商转型.     

对大众化教育阶段高职院校功能定位与发展评价的思考

随着高等教育特别是高等职业教育的迅猛发展,我国的高等教育已进入大众化教育阶段。本文分析了大众化教育阶段的时代特点和历史要求,明确了高职院校发展的功能定位,提出了高职院校建设与发展的评价指标体系,这对于高职院校贯彻落实科学发展观具有重要意义。     

Impact of Personal and Situational Factors on Taxpayer Compliance: An Experimental Analysis

This study used a laboratory experiment with monetary incentives to test the impact of three personal factors (moral reasoning, value orientation and risk preference), and three situational factors (the presence/absence of audits, tax inequity, and peer reporting behavior), while controlling for the impact of other demographic characteristics, on tax compliance. Analysis of Covariance (ANCOVA) reveals that all the main effects analyzed are statistically significant and robustly influence tax compliance behavior. These results highlight the importance of obtaining a proper understanding of these factors for developing effective policies for increasing the level of compliance, and indicate that standard enforcement polices based on punishment alone should be supplemented by an information system that would acquaint tax payers with the compliance level of other tax payers; reinforce the concept of fairness of the tax system among tax payers; and develop programs that enhance and appeal to a taxpayer's moral conscience and reinforce social cohesion.     

一种通用数字中频正交扩频调制器的实现

提出了一种适应于宽带扩频通信系统的数字中频调制的实现方案,它基于正交调制、DDS、数字上变频和数字内插等技术,采用通用硬件平台,可以生成多种中频调制信号,可广泛用于数字化扩频通信电台、宽带CDMA、软件无线电、遥控遥测等通信系统中。     

大频偏卫星扩频信号的基带处理算法的FPGA实现

多普勒频偏一直是卫星通信中不可忽视的消极因素。针对多路混叠的卫星扩频信号下变频以后所产生的大多普勒频偏,在匹配滤波结构中采取改进的部分相关算法,在基于并行导频的信道估计中根据信道状况改变估计长度,实现了大频偏下卫星扩频信号的基带处理。