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As GoF state pattern did not give sufficient details for implementation, developers can complete in various ways. Some prefer setting properties of Context in method Handle. Some use state transferring table in method Request of object Context to retrieve state table to fulfill state transferring, which separates concrete rules out of state pattern. Context in GoF state pattern is used as user operation interface and also used for state class management. User operation part is usually related with dedicated application, while state management part is normally unchanged in each state pattern program. Therefore, we can separate it to two objects. One is for client object of user operation interface, changing with applications. The other is for state management, achieving state transferring by retrieving and interpreting state transferring table. Classes and their relations of the whole state pattern are shown as figure 2. Figure 2. Novel state pattern class relation diagram which demonstrates relations among Context, State and StateManage as well as details of implementation In figure 2, state management class StateManage inherits from client class Context, while StateManage has an abstract class State to represent state. Taking advantage of StateManage, we can separate class Context of dedicated application from the framework to maximal extent, including functionalities in class State that are related with state management and indexing state transferring table, and embrace user event mapping mechanism in class State. As these functionalities normally keep unchanged, we can place them in eventcondition-state general framework as constant part. IV. DESIGN MOBILE INPUT METHOD WITH EVENT- CONDITION-STATE DESIGN PATTERN Demands for intelligence in mobile phone urge development of intelligent mobile phone. Popularity of operation system on mobile phone makes it possible to develop a third party input method system on it. Meanwhile there are various mobile models and systems presently, making it difficult to develop an input method software for them. Moreover, the future update and maintenance of input method will be in trouble as well. As we can see, although a mobile phone may have different input methods, mobile phone will eventually be in one of the three states which are numeric number input state, English input state and non-English input state. These three states have similar state transferring rules to the ones in event-condition-state pattern. At the same time, each input state can be described by a sub state model. For example, English ABC, an English input method, will be in initial state before user input and in input state after user input. If there is no input within an interval, the system will return to initial state. The whole view of state transferring is shown in figure 3. English Input Initial State Timeout||Delete Punctuation||English Same Key Input State Different Key Figure 3. State transferring diagram of English input method There are usually far less keyboards in mobile than in PC, usually consisting of numeric key 0 to numeric key 9, key shift and key star. To save as many keys as possible, one single key is normally given several alternatives in different cases, e.g. numeric key 0 to numeric key 9 represent numeric 0 to 9 separately in numeric number input state. However, they are used as candidate keys in other situations, e.g. they are used as English candidate keys in English input mode. There will be even more complicated combinations in non-English inputting methods. For instance, in Chinese character input method, they are treated as input candidate keys and they will be turned to selecting keys when a user is selecting from candidate Chinese character. So it is the same with other keys. Key shift is used as shifting and key star is used to input character star. Meanwhile they have other meanings in different input methods. Although such one key with multiple interpretations is sophisticated, it conforms to the event-condition-state pattern. Thus, it is possible to develop input method systems in mobile with the framework proposed. Here, we use client interface class Context to encapsulate interfaces to mobile operation system, internal data and message processing component, of which two main interfaces are PressKey which receives and processes information when the key is pressed, and CommitResult which delivers character that is selected by the user. V. DEVELOPING MOBILE INPUT METHOD USING THE PATTERN A. For Windows Mobile System Windows Mobile is an open and intelligent mobile system. It provides developer a set of interface functions that are similar to those of Windows system. These interface functions are dynamic libraries between system and application. They get user’s pressing key message, and send one or more characters to application after processing. Their relations are shown in figure 4. We can see from figure 3 that it is input manager that interacts with input model directly. User’s pressing key message is passed to input method model through input method manager. Characters from input method are also delivered to application through input manager. 158
Keyboard event Application User module in Windows Mobile Input method manager Input method Figure 4. Relation between input method and system in Windows Mobile system In fact input method manager can interact by input method user interface or by function interface of dynamic library. The difference is that input method user interface is the interface for input manager, while function interface is interface for input manager to maintain the whole input method modules. When applying the model in Windows Mobile, a Context object is necessary to implement these two kinds of interact interfaces requiring by input method manager. The following is part of key code of Context in Windows Mobile system. class Context:public CWinIME{ PreRequest(int iEvent,short wParam,long lParam); Request(int iEvent,short wParam,long lParam); : } Here CWinIME is an UI class for input method, which encapsulates all UI message processing code for input method. Class Context provides UI by inheriting from class CWinIME. Method Prerequest and method Request are two main entries for users to manipulate state machine. Prerequest is used to query how state machine will deal with current message and Request is used to deliver current message to state machine for processing. B. For Symbian System Symbian OS is an operating system designed for mobile devices, with associated libraries, user interface frameworks and reference implementations of common tools. It provides an API for input method, called FEP (Front-End Processor), to developers. Developers can implement the interface by inheriting from class CcoeFep which exists in form of polymorphous and dynamic link library. It receives user’s pressing key message, and sends characters to application for processing after input method system completes coping with the message. The whole input method system in Symbian is composed of FEP and FEP server. FEP deals with internal logic of input method. FEP server acts as input method server and is in charge of data resource related processing. Symbian is a multitasking operation system, and there may be several input method instances running simultaneously. Different input method instances can share one thesaurus or corpus without adding more overhead, with which Symbian system achieves data share among input method instances by client server architecture. The relations among user, FEP and application are shown in figure 5. Figure 5. Relations among user, FEP, FEP server and application in Symbian system We implement FEP API in Context to apply the input method model in Symbian system. The following is part of key code of Context in Symbian system. class Context:public CSybFep{ TKeyResponse OfferKeyEventL (const TKeyEvent& aKeyEvent, TEventCode aEventCode); int Request(int iEvent,short wParam,long lParam); : } Here CSybFep is derived from base class CcoeFep, of which method ConstructL will generate a CSybFepControl object that has the highest priority to handle input event so that it can deal with input event ahead of application. Context implements API in Symbian system by inheriting from class CSybFep. Method OfferKeyEventL and method Request are designed to receive key pressing message and manipulate state machine. OfferKeyEventL overrides method OfferKeyEventL of CSybFep, gets key pressing message with CSybFepControl, and calls method OfferKeyEvent in Context to transform data. Then OfferKeyEvent transmits transformed data to method Request, which delivers its current event to concrete sub state model for further processing. VI. CONCLUSION Before we develop a thirty party input method system in Windows Mobile system and Symbian system, we analyzed different versions of an input method on both systems, finding all the internal logics are basically the same except interfaces to the two systems are different, which has the obvious feature to fit the event-conditionstate framework. So we use idea of state pattern in design and other phases in development. Subsequently we rewrote Context part related with system interfaces of different systems. To avoid redundant developing work on both systems, we encapsulated the part related with internal logic of input method by concrete subclasses. The approach proved to be of benefit for providing convenience for later synchronous updating and maintenance of two different versions of input methods. The event-condition-state framework proposed in the paper is not only fit for input method development, but also fit for other software design and development. ACKNOWLEDGMENT Funding: This work was supported by School of Computer Science and Technology, Soochow University 159
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Proceedings The Second Internationa
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Table of Contents Message from the
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Zuming Xiao, Zhan Guo, Bin Tan, and
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Message from the Symposium Chairs T
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Second International Symposium on N
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ISBN 978-952-5726-09-1 (Print) Proc
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model that can deal with time serie
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ISBN 978-952-5726-09-1 (Print) Proc
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training for the Wushu competition
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information, called weak uncertain
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Student side Student side Student s
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If we define element of student as
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QoS, each frame data is divided int
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for Imaging Two and Three Phase Flo
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A. Profiling&following control algo
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Research and Realization about Conv
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PDF document structure is a tree st
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support 10 Mb / s. But ENC28J60 onl
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condition the first byte output of
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According to maximum membership deg
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ubber according to the mass ratio o
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Ⅲ. AN IMPROVED DNA ALGORITHM FOR
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Ⅴ.CONCLUSION REMARKS DNA computer
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its first child q 1 on the left, th
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chains can greatly improve efficien
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II. RELATED WORK A. Mobile Service
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special services. SOAP is used to b
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detection methods of DDoS attacks m
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Step4 calculate the new subordinate
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Figure 1. An analysis of the partit
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The preceding three formulas can be
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And the decay speed of buffer seque
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distance of view point. Given that
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Ⅳ. EVALUATION OF BLENDED LEARNING
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symmetric with respect to the origi
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each sample belongs to each categor
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A. Data Preparing To generate our t
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oth α and β . determination of Qu
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Strong earthquake 0.1< M L
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Page 129 and 130: Tabal.1 Combinational fault logic t
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Page 133 and 134: TABLE I. DESCRIPTION OF PROPOSITION
Page 135 and 136: Figure 2. The process of the invers
Page 137 and 138: Figure 9. (a)the original image.(b)
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Page 141 and 142: In order to reduce to the number of
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Page 191 and 192: ACKNOWLEDGMENT This work is funded
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The relation between the lattice im
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Figure 2. Example of single-step de
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evocation and the fourth group stor
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focused mainly on rule-based forms
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Ⅵ. CONCLUSION Figure 6. The Flask
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EDCF in comparison with DCF, has so
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B. Simulation results and analysis
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in routing table. When search resou
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others through the selective emotio
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such as weather information, techno
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the opening window, a related page
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1) Process context storage areas. I
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V. CONCLUSION In this thesis, sCPU-
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main types of horizontal search env
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Enterprise Portal security provides
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() t = [ S () t S () t ] T N S ,...
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[2] Kumaravel, N., and Kavitha, V.,
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output, so BP network has been wide
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input to the artificial neural netw
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(2) In a process (tokens from outsi
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The reduction process consists of t
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all eight normal vectors are identi
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is B object , and the number of emp
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xi, j y' = εα ( (1 + tanh( )) −
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Error 8000 7000 6000 5000 4000 3000
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Architecture (AMBA) a new bus archi
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In order to ensure the smooth proce
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In this paper, we adopt two Sobel o
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four layers.The far right of the gr
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TABLE II. OPERATIONAL EMPLOYEE TABL
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A. Object-relational Type To audit
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to execution time. Also, DBA would
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Liping Chen .......................
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