Computer Terms

本文解析了信息技术领域的关键术语,包括漏洞、安全性、闭包、网络流量等,并解释了这些概念在不同上下文中的含义。

1 vulnerability
  ①the state of being vulnerable or exposed;
  ②susceptibility to injury or attack;
2 vulnerability security
  A bug or feature of a system that exposes it to possible attack, a flaw in the system's security.
  A common example of a vulnerability due to a bug is buffer overrun, where carefully constructed
  input can allow an attacker to insert arbitrary code into a running program and have it executed.
  The most serious vulnerabilities are those in network software, especially if they exploit traffic
  that is allowed through the firewall like HTTP, for example exploiting a bug in a web browser.
  The Open Source Vulnerability Database lists many vulnerabilities.
3.closure      [eg.the closure model supported by JavaScript Engine]
  In a reduction system, a closure is a data structure that holds an expression and an environment
  of variable bindings in which that expression is to be evaluated. The variables may be local or global.
  Closures are used to represent unevaluated expressions when implementing functional programming languages
  with lazy evaluation. In a real implementation, both expression and environment are represented by pointers.
  A suspension is a closure which includes a flag to say whether or not it has been evaluated.
  The term "thunk" has come to be synonymous with "closure" but originated outside functional programming.
4.network traffic
5.anchor & dock & align & padding
6.preemptive multitasking 抢先式多任务处理
7.RJ = Registered Jack 标准插座
8.CD-R = Compact Disc-Recordable 可写光盘
9.hand-held device
10.laptop computer  膝上型计算机
11.electronic commerce
12.blacklist & graylist & whitelist
13.hyphen
14.a piece of software
   A regular expression "engine" is a piece of software that can process regular expressions,
   trying to match the pattern to the given string.
15.broken link
   a connection in an HTML document to a URL that is not working properly,
   esp. because it goes to a Web page that is no longer available or which
   has moved to another server.
   eg.When a broken link is selected in a Web document, an error message appears on the screen.
16.full shape(full width) 全角  half shape(half width) 半角
17.Moon choice toggles Full/Half Shape.
   Full Shape are double-byte characters e.g. abcde.
   Half Shape are normal single-byte characters we use most of the time.
   The keyboard button toggles on-screen keyboard.
18.SBCS = single byte character set  
     DBCS = double byte character set
19.IME = Input Method Editor
20.collate
   [Computers]to merge (sequenced data from two or more data sets or files) to produce a new
   sequenced data set or file.
   collation  排序规则
21.Japanese Kanji  日本汉字   Korean Hangul 韩国文字
22.umbrella term
   An umbrella term is a word that provides a superset or grouping of related concepts,
   also called a hypernym.For example, cryptology is an umbrella term that encompasses
   cryptography and cryptanalysis, among other fields.Similarly, an "umbrella organization"
   can be an organization which is a central and coordinating body representing a number of
   smaller, separate bodies.
23.every nook and cranny
   something remote; "he explored every nook and cranny of science"
   eg.This chapter cannot explore every nook and cranny.
24 natural drift
     at a minimum
     cross-cutting   横切关注点
     tradeoff
    Analyze the [tradeoffs] between quality attributes
    over-engineer
    on a case-by-case basis
25 tight coupling      loose coupling
     highly cohesive   lowly cohesive
26 web farm 网络场(.NET Framework 类库文档中的翻译)
27 reclaim
    
1.The pooler then tries to reclaim any connections until the time-out is reached
        
(the default is 15  seconds).
       
池进程尝试重新建立任何连接,直到到达超时时间(默认值为15 秒)。
    
2.The connection pooler periodically scans connection pools looking for unused 
       
connections that were not closed by Close or Dispose, and reclaims those it finds.
       
连接池进程定期扫描连接池,查找没有通过 Close Dispose 关闭的
       
未用连接,重新建立找到的连接。
28 pending
   
Therefore, you can close the connection without generating an error, even though
    a
distributed transaction is still pending. This allows you to commit or abort the
   
distributed transaction at a later time.
   
因此,即使分布式事务仍然挂起,仍可以关闭该连接而不会生成错误.
    这样,您就可以
在随后提交或中止分布式事务。
29 connection pooling 连接池  pooler 池进程[或池管理程序]
30 ASCII/ˈæski/=American Standard Code for Information Interchange
31 CAPTCHA or Captcha/ˈkæptʃə/=Completely Automated Public Turing test to tell 
     Computers  and Humans Apart(全自动区分计算机和人类的图灵测试)

 

 

本课题设计了一种利用Matlab平台开发的植物叶片健康状态识别方案,重点融合了色彩与纹理双重特征以实现对叶片病害的自动化判别。该系统构建了直观的图形操作界面,便于用户提交叶片影像并快速获得分析结论。Matlab作为具备高效数值计算与数据处理能力的工具,在图像分析与模式分类领域应用广泛,本项目正是借助其功能解决农业病害监测的实际问题。 在色彩特征分析方面,叶片影像的颜色分布常与其生理状态密切相关。通常,健康的叶片呈现绿色,而出现黄化、褐变等异常色彩往往指示病害或虫害的发生。Matlab提供了一系列图像处理函数,例如可通过色彩空间转换与直方图统计来量化颜色属性。通过计算各颜色通道的统计参数(如均值、标准差及主成分等),能够提取具有判别力的色彩特征,从而为不同病害类别的区分提供依据。 纹理特征则用于描述叶片表面的微观结构与形态变化,如病斑、皱缩或裂纹等。Matlab中的灰度共生矩阵计算函数可用于提取对比度、均匀性、相关性等纹理指标。此外,局部二值模式与Gabor滤波等方法也能从多尺度刻画纹理细节,进一步增强病害识别的鲁棒性。 系统的人机交互界面基于Matlab的图形用户界面开发环境实现。用户可通过该界面上传待检图像,系统将自动执行图像预处理、特征抽取与分类判断。采用的分类模型包括支持向量机、决策树等机器学习方法,通过对已标注样本的训练,模型能够依据新图像的特征向量预测其所属的病害类别。 此类课题设计有助于深化对Matlab编程、图像处理技术与模式识别原理的理解。通过完整实现从特征提取到分类决策的流程,学生能够将理论知识与实际应用相结合,提升解决复杂工程问题的能力。总体而言,该叶片病害检测系统涵盖了图像分析、特征融合、分类算法及界面开发等多个技术环节,为学习与掌握基于Matlab的智能检测技术提供了综合性实践案例。 资源来源于网络分享,仅用于学习交流使用,请勿用于商业,如有侵权请联系我删除!
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