PLC的编程语言与编程注意事项

本文简述了可编程控制器(PLC)的基本特点和发展情况,介绍了PLC的顺序功能图、梯形图、功能模块图、指令表和结构文本等编程语言及其功能特点,阐述了PLC在编程过程中梯形图与指令表语言编程的规则和注意事项等。熟练掌握PLC程序的编程语言、编程方法及编程注意事项,对于PLC编程的快速入门及工程应用具有十分重要的意义。     

Drivers of firm formalization in Vietnam: an attention theory explanation

Informal enterprises are widely viewed as a mechanism to engage unemployed people in the economy and thereby alleviate poverty in developing economies. However, over-representation in an economy may lead to both economic growth and broader employment opportunities being sacrificed. This paper presents a process model to investigate three potential drivers for firms to formalize: the first from a desire to grow and develop the firm through innovation, the second from the wish to access government financial support and the third stimulated by the payment of unofficial payments or bribes. We use data from surveys of Vietnamese firms in 2005, 2007, 2009 and 2011 to investigate these drivers of formalization. Although we find support for all three of these drivers, the results differ in significance across years and firm types. We explain these differences using attention theory to show how different situations and events can make the formalization decision more likely over time.     

Distributed Visual Language Environments for Cooperation and Learning: Applications and Intelligent Support

An increasing number of collaborative learning environments is based on shared workspace systems using two-dimensional graph-structured visual representations such as argumentation networks and concept maps. We propose an integrated framework that allows for flexibly specifying a wide range of visual languages and plugging in components for operational semantics, adequate feedback and intelligent support. The generic application CardBoard provides card-based user interaction and collaboration by means of different languages in shared workspaces. To enhance modifiability, the interfaces between the distributed heterogeneous system components, particularly between intelligent components and user interfaces, have been standardised.     

A Rich Vein for “Reality Mining”北大核心CSSCISSCI

Arik Hesseldahl In the aftermath of the September 11 attacks, U.S. officials quickly turned their attention to other potential targets, including California's Golden Gate Bridge. What would happen if terrorists took down the bridge between San Francisco and Marin County? How much of the region would be affected and for how long?     

A dual-process model of how incorporating audio-visual sensory cues in video advertising promotes active attention

Capturing consumers’ attention to video advertising is a key marketing challenge. Using real video advertising viewed by a sample of consumers matching the US population on age and gender, the authors examined attention to audio-visual and visual sensory cues identifying the brand using a biometric measure, phasic heart rate. The findings show differences in attention type depending on which senses are stimulated by the sensory cue. This research uncovers a mechanism (internal processing) for how consumers process multisensory cues (audio-visual) in video advertising and confirms visual sensory cues can elicit automatic attention through the orienting response. In addition to the dual-coding explanation for the superiority of audio-visual sensory cues, the present research suggests a second reason: that audio-visual sensory cues can elicit additional internal processing of the brand name, resulting in active attention and better storage of the brand in memory. This has implications for the limited capacity model of motivated mediated message processing, as well as for marketers relating to the type of content recommended to follow an audio-visual or visual sensory cue in video advertising.     

基于CIS战略的国家全域旅游示范区创建

[目的]创建全域旅游示范区,已经成为地方政府和旅游业界推动旅游业供给侧改革、促进区域旅游持续发展、统筹城乡一体化发展的共识。[方法]创建全域旅游示范区既没有现成的范例,也没有统一的模式,需要在具体实现途径上认真探索,其中,引入CIS战略,是一个不错的选择。在有针对性地筛选CIS构成要素后,构建国家全域旅游示范区CIS系统,并制定其战略步骤。首先是在以理念识别(即MI,包括示范区称谓和使命)为核心的基础上,对行为识别(即BI,包括示范区内部行为识别系统和外部行为识别系统等)和视觉识别(即Ⅵ,包括外观形象、应用系统、产品系统等)的具体化,然后是对三者在时间跨度和空间纬度上推进的总体设计。[结果]实施国家全域旅游示范区CIS战略,就是将组织识别系统的理论应用于国家全域旅游示范区的创建与运营,以提高国家全域旅游示范区的识别度、知名度和美誉度,通过识别系统来突出该示范区不可代替的个性和加强对社会公众持久的吸引力。[结论]CIS系统是国家全域旅游示范区的无形资产,它是一种市场号召力,在推动国家全域旅游示范区可持续发展、改善示范区生态环境状况、提高示范区居民生活水平、重塑示范区形象、优化示范区产业结构等方面都有积极的作用。     

Does news travel slowly before a market crash? The role of margin traders

We investigate how investor overconfidence and attention affect market efficiency around the 2015 Chinese stock market crash. We find that the price delay before the crash is about twice the price delay after the crash. Investors become more sensitive to market movements after the crash. Price delays are larger on market down-days than on up-days before the crash, but the differences are insignificant between up- and down-days after the crash, indicating that negative information travels slowly only when investors are overconfident. Margin traders follow market trends and intensify the pyramiding and de-pyramiding effects caused by market sentiment change.     

基于开源可视化开发工具对移动端开发的适应改造

现阶段电力企业推广使用移动应用进行办公,提高了一线生产人员的工作效率。但移动应用的的数量也越来越多,功能也越来越复杂,对开发人员的要求也越来高。为了降低移动端开发的复杂度,越来越多的移动应用采用移动前端混合技术开发,由此引入开源的可视化开发工具,降低开发人员在移动应用开发上的技术要求和复杂性。     

Attention allocation and international stock return comovement: Evidence from the Bitcoin market

We employ extreme Bitcoin returns as exogenous shock events to investigate the impact of investor attention allocation on worldwide stock return comovement. We find that (1) these shock events decrease worldwide stock return comovement, (2) there is an asymmetric effect in which a crash shock event has a greater impact on return comovement than a jump shock event, and (3) the impact of these shock events on equity comovement is more pronounced in emerging markets. Our results suggest that identifying extreme Bitcoin returns will benefit portfolio construction. Our results may be of considerable interest to investors, as well as to academics interested in portfolio diversification, asset comovement, and cryptocurrencies.     

Hero shots: involved fathers conquering new discursive territory in consumer culture

ABSTRACT

In this paper, we explore how visual expressions of culture offer new discursive territory within which consumer cultural ideals can be negotiated on a global scale. Through a critical visual analysis of the revelatory case Swedish Dads, we find hero shots depicting involved fathers where children’s needs and the hermetic confines of the home take center stage, as opposed to the traditional fatherhood ideals portrayed in western contemporary advertising, media, and popular culture. We demonstrate how the Swedish state’s gender ideology was encoded into a communicative event in the form of hero shots and subsequently dispersed by visual consumers as well as political and commercial stakeholders pushing this particular agenda and/or capitalizing on its tendencies. This in such a way that the event conquered new discursive territory fostering new types of consumer cultural negotiations on fatherhood ideals also in other cultural settings.