Design and implementation of a display oriented text editor

This paper outlines the design and implementation of a text editor which is designed for use on an alphanumeric display terminal with cursor control. Text may be edited directly on the screen by deleting, overstriking or inserting characters. There also exist commands to manipulate and search sections of text. A major design consideration was that the editor should be easily usable by untrained casual users.     

A programmable text editor

While operating system command languages have improved in recent years, the advances have not yet been widely applied to other command interpreters. This paper describes an editor that has been given two features popular in operating system command languages — i/o redirection and programmable command files. The result is suited both to editing and to some repetitive reformatting tasks often solved by one-shot, ad hoc programs. Examples display the utility of the extensions, and implications for still other command interpreters are discussed.     

Development of the ZED text editor

The development process which resulted in a new text editor is described. The reasons for undertaking this development are discussed, and in particular the increased amount of non-interactive use of text editors is stressed. The approach taken to the project is described, including the involvement of users in defining the specification and testing prototypes. Finally the main features of the new editor, ZED, are covered.     

CHEF: A versatile portable text editor

CHEF is an interactive text editor for use with both printing and display terminals. Its prime field of application is computer source program editing but it has some word processing capabilities that make it useful for documentation and general text editing work. There is a comprehensive set of whole-line operations, including block moves and the insertion of text from external files, together with substring replacement and line segmentation based on a flexible pattern-matching algorithm. There is a set of one-line buffers for temporary storage of lines or command strings and complex command sequences can be built up by macro substitution. Considerable effort has been made to design a command syntax that is flexible and consistent and, at the same time, minimizes effort during the editing process. CHEF copies the user's file into an internal work-space so that the original is not disturbed until the user is satisfied with the results of the editing session. A virtual memory technique is used to provide a work-space that can be almost any desired size, with random access to any part and efficient editing operations. CHEF is written in BCPL and has already been implemented on four different machines.     

A survey of some text editors

Every computer system seems to have a different method of editing files. This survey considers the tasks, constraints and user interface for computer editors. Several editors are examined and reviewed. This paper also contains a glossary of some terms connected with editing and includes a reference to other surveys and bibliographies.     

Design of a simple screen editor

This paper describes a simple screen editor, which could be implemented fairly easily on most interactive computer systems. A screen editor shows whole pages of text on a video display terminal; text is modified by moving the cursor and overtyping mistakes. Screen editors are significantly more pleasant to use than conventional (hard copy) editors for most editing tasks. In this paper, one editor is described in some detail, then design goals and implementation problems for all editors of this type are discussed.     

A general-purpose text editor for OS/360

The IBM 370/165 system at Cambridge provides batch and interactive computing facilities under OS 360/MVT with the Time Sharing Option (TSO). The Cambridge text editor, EDIT, provides comprehensive file manlpulation facilities in a unified manner for both batch and interactive users.     

A compact,portable CRT-based text editor

CRT-based text editors offer a better user interface than most teletype-based text editors but are more complex and less portable. Building a screen editor as a front end to a line editor exploits existing code, yields a more compact, portable result, and permits one computer to edit another's files. This paper describes such an editor.     

数据包在网络异常行为研究中的应用

以网络访问中的异常行为为研究对象,通过对数据包的深入分析,从数据包中提取与网络异常行为相关的内容特征,然后通过与数据包包头信息的集合,构成对网络行为进行研究的特征库。在实验的基础上,通过对所提取得到的网络异常特征进行记录,构建完善的网络异常行为数据库。     

Morphology-based text line extraction

This paper presents a morphology-based text line extraction algorithm for extracting text regions from cluttered images. First of all, the method defines a novel set of morphological operations for extracting important contrast regions as possible text line candidates. The contrast feature is robust to lighting changes and invariant against different image transformations like image scaling, translation, and skewing. In order to detect skewed text lines, a moment-based method is then used for estimating their orientations. According to the orientation, an x-projection technique can be applied to extract various text geometries from the text-analogue segments for text verification. However, due to noise, a text line region is often fragmented to different pieces of segments. Therefore, after the projection, a novel recovery algorithm is then proposed for recovering a complete text line from its pieces of segments. After that, a verification scheme is then proposed for verifying all extracted potential text lines according to their text geometries. Experimental results show that the proposed method improves the state-of-the-art work in terms of effectiveness and robustness for text line detection.     

The segmented presentation of visually structured texts: Effects on text comprehension

The effects of a segmented presentation applied to a visually structured text were examined in the context of the explosion of small-screen devices. Empirical research investigating the influence of text signaling on text processing suggests that the text visual structure may influence comprehension by facilitating the construction of a coherent text representation. Undergraduate students were asked to read a text under different segmented conditions varying on the type of information provided about the text visual structure and on the segmentation unit. When the segmented presentation did not supply any information or when it only offered local information about the text visual structure, text comprehension depended on the segmentation unit. When the segmentation unit did not fit the text visual structure, an erroneous text representation was constructed, whereas the compatible segmentation unit led to a correct text comprehension. When the segmented presentation rendered the global text visual structure, the segmentation unit had no effect on comprehension and more readers constructed a correct and close text representation. Thus, the text visual structure seems to play a role in text comprehension and this role has to be taken into account for text segmented presentation.     

正则表达式在Word中的应用

微软在Word 2000及后续所有版本中,提供基于正则表达式的查找替换功能,可对文中符合正则表达式规则的文字实现一次定位选中,并可对查找到的文字按照替换表达式进行批量替换。Word正则表达式提供包括转义符、限定符、定位符、字符集合、分组符、反向引用等元字符功能。Word正则表达式可结合文本格式功能实现联合查找。     

Fast text categorization using concise semantic analysis

Text representation is a necessary procedure for text categorization tasks. Currently, bag of words (BOW) is the most widely used text representation method but it suffers from two drawbacks. First, the quantity of words is huge; second, it is not feasible to calculate the relationship between words. Semantic analysis (SA) techniques help BOW overcome these two drawbacks by interpreting words and documents in a space of concepts. However, existing SA techniques are not designed for text categorization and often incur huge computing cost. This paper proposes a concise semantic analysis (CSA) technique for text categorization tasks. CSA extracts a few concepts from category labels and then implements concise interpretation on words and documents. These concepts are small in quantity and great in generality and tightly related to the category labels. Therefore, CSA preserves necessary information for classifiers with very low computing cost. To evaluate CSA, experiments on three data sets (Reuters-21578, 20-NewsGroup and Tancorp) were conducted and the results show that CSA reaches a comparable micro- and macro-F₁ performance with BOW, if not better one. Experiments also show that CSA helps dimension sensitive learning algorithms such as k-nearest neighbor (kNN) to eliminate the “Curse of Dimensionality” and as a result reaches a comparable performance with support vector machine (SVM) in text categorization applications. In addition, CSA is language independent and performs equally well both in Chinese and English.     

A design rationale for a language-based editor

This paper reviews the design issues that arise in the construction of effective language-based editors for the preparation of syntactically and static semantically correct language sentences, typically computer programs. The need for such editors to support a pluralistic view of program structure is identified, together with the need to observe the constraints on performance and storage consumption if such editors are to be accepted by professional programmers. From these basic needs, more specific requirements for the display, parsing and semantic checking components of such an editor are derived.     

A text mining approach to Internet abuse detection

As the use of the Internet in organizations continues to grow, so does Internet abuse in the workplace. Internet abuse activities by employees-such as online chatting, gaming, investing, shopping, illegal downloading, pornography, and cybersex-and online crimes are inflicting severe costs to organizations in terms of productivity losses, resource wasting, security risks, and legal liabilities. Organizations have started to fight back via Internet usage policies, management training, and monitoring. Internet filtering software products are finding an increasing number of adoptions in organizations. These products mainly rely on blacklists, whitelists, and keyword/profile matching. In this paper, we propose a text mining approach to Internet abuse detection. We have empirically compared a variety of term weighting, feature selection, and classification techniques for Internet abuse detection in the workplace of software programmers. The experimental results are very promising; they demonstrate that the proposed approach would effectively complement the existing Internet filtering techniques. An earlier version of this paper appeared in the Proceedings of the Fifth Workshop on e-Business (WeB), Milwaukee, WI, 2006.     

Video text detection and segmentation for optical character recognition

In this paper, we present approaches to detecting and segmenting text in videos. The proposed video-text-detection technique is capable of adaptively applying appropriate operators for video frames of different modalities by classifying the background complexities. Effective operators such as the repeated shifting operations are applied for the noise removal of images with high edge density. Meanwhile, a text-enhancement technique is used to highlight the text regions of low-contrast images. A coarse-to-fine projection technique is then employed to extract text lines from video frames. Experimental results indicate that the proposed text-detection approach is superior to the machine-learning-based (such as SVM and neural network), multiresolution-based, and DCT-based approaches in terms of detection and false-alarm rates. Besides text detection, a technique for text segmentation is also proposed based on adaptive thresholding. A commercial OCR package is then used to recognize the segmented foreground text. A satisfactory character-recognition rate is reported in our experiments.Published online: 14 December 2004     

A format editor

This paper describes a text processing program for producing documents that are to be reproduced. The program runs on a small (12K) computer with paper tape input, a storage scope display unit and an on-line teletype. Formatting commands are inserted in the text. Compound commands may be formed form the basic ones. This feature aids the specification of complicated formats required for items such as tables and titles. The user can display a page of text before and after the page is formatted and correct it interactively.     

A compact function for regular expression pattern matching

This paper describes a simple compiler and interpreter for a finite state machine recognizer of patterns represented by regular expressions. The algorithm is designed to be compact and to require little work space.     

正则表达式基础及C#下的简单应用

通过表格的形式将正则表达式的语法进行总结,同时给出一些常用的正则表达式,方便读者在相关方面的练习与应用。最后通过列举C#下正则表达式简单应用,将正则表达式的语法应用于C#编程实践中,更方便大家理解与应用。