Foeused on the lack of proper organization for patterns in the development of pattern based software, a POMSDP model with layered tree structure for organizing patterns during the process of development was put torwar...Foeused on the lack of proper organization for patterns in the development of pattern based software, a POMSDP model with layered tree structure for organizing patterns during the process of development was put torward. The model and its interrelated eoneepts were strictly defined and introduced by applying the theory of set, symbolie logic and pattern, which ensures the correctness, maturity and expansibility of the model. The expansibility of the model was discussed mainly. The basic realization and the application in the automatic query system were presented. Based on the existing software development methods, the POMSDP model resolves the problem of chaos in the application of patterns, strengthens the controllability of the system, and facilitates the improvement, maintenance, expansion, and especially the reengineering of the software system.展开更多
The lack of existing solutions makes it really hard to understand formal specification languages since the application domain for representations is useful for the purpose of carrying out certain software engineering ...The lack of existing solutions makes it really hard to understand formal specification languages since the application domain for representations is useful for the purpose of carrying out certain software engineering operations such as slicing and the computation of program metrics.A Z specification dependence graph is presented in this letter. It draws on the strengths of a range of earlier works and adapts them, if necessary, to the Z language.展开更多
This paper investigates the differences between vowels [i] and [ I] pronounced by Chinese English speakers and American English speakers. Seven people consisting of two natives and five Chinese have read a list of sen...This paper investigates the differences between vowels [i] and [ I] pronounced by Chinese English speakers and American English speakers. Seven people consisting of two natives and five Chinese have read a list of sentences and their voices were recorded. A software program is used to analyze their voices. In spectrograms generated by Praat, the connection between formant values and articulation features is used to investigate how native speakers pronounce these two vowels and what the differences are between native speakers and Chinese speakers. Through this investigation, it is discovered that Chinese speakers have lower tongue position in [i] and their tongues are more forward in [I], thus making it hard to differentiate these two vowels. Moreover, the length of [i] is much shorter than those in American pronunciation, suggesting that Chinese speakers differentiate [i] and [I] largely by length. However, the comparison of Chinese speakers and native speakers proved otherwise.展开更多
This article mainly introduces the multi-layer distributed C/S architecture of system design scheme. Its working principle is the client program runs automatically after the computer starts, and establish communicatio...This article mainly introduces the multi-layer distributed C/S architecture of system design scheme. Its working principle is the client program runs automatically after the computer starts, and establish communication with the application server. The network administrator can monitor and intelligent management of the client computer through the server program, the computer will execute the corresponding operation according to the server to send command instructions. The system realize the main module of the whole system framework, network monitoring data initialization module, network data transmission module, image coding and decoding module, the advantages of system make full use of existing LAN resources, timely delivery and manaRement information.展开更多
文摘Foeused on the lack of proper organization for patterns in the development of pattern based software, a POMSDP model with layered tree structure for organizing patterns during the process of development was put torward. The model and its interrelated eoneepts were strictly defined and introduced by applying the theory of set, symbolie logic and pattern, which ensures the correctness, maturity and expansibility of the model. The expansibility of the model was discussed mainly. The basic realization and the application in the automatic query system were presented. Based on the existing software development methods, the POMSDP model resolves the problem of chaos in the application of patterns, strengthens the controllability of the system, and facilitates the improvement, maintenance, expansion, and especially the reengineering of the software system.
文摘The lack of existing solutions makes it really hard to understand formal specification languages since the application domain for representations is useful for the purpose of carrying out certain software engineering operations such as slicing and the computation of program metrics.A Z specification dependence graph is presented in this letter. It draws on the strengths of a range of earlier works and adapts them, if necessary, to the Z language.
文摘This paper investigates the differences between vowels [i] and [ I] pronounced by Chinese English speakers and American English speakers. Seven people consisting of two natives and five Chinese have read a list of sentences and their voices were recorded. A software program is used to analyze their voices. In spectrograms generated by Praat, the connection between formant values and articulation features is used to investigate how native speakers pronounce these two vowels and what the differences are between native speakers and Chinese speakers. Through this investigation, it is discovered that Chinese speakers have lower tongue position in [i] and their tongues are more forward in [I], thus making it hard to differentiate these two vowels. Moreover, the length of [i] is much shorter than those in American pronunciation, suggesting that Chinese speakers differentiate [i] and [I] largely by length. However, the comparison of Chinese speakers and native speakers proved otherwise.
文摘This article mainly introduces the multi-layer distributed C/S architecture of system design scheme. Its working principle is the client program runs automatically after the computer starts, and establish communication with the application server. The network administrator can monitor and intelligent management of the client computer through the server program, the computer will execute the corresponding operation according to the server to send command instructions. The system realize the main module of the whole system framework, network monitoring data initialization module, network data transmission module, image coding and decoding module, the advantages of system make full use of existing LAN resources, timely delivery and manaRement information.
