【文章內(nèi)容簡(jiǎn)介】 lprediction time is directly related to the precision of information showed on the intelligent electronic station , the accuracy of the next bus’s arrival prediction time showed on the intelligent electronic station board is a very key 、the prediction model of bus arrival time displayed on the intelligent electronic station board need to be improved , theory research，system design and implementation of the advanced public transportation systems, as an important part of the intelligent transportation systems ,are being 、the technology ponents of the bus arrival time are divided into the following five parts:???? the average travel time through the sections。queuing delay time as a result of the impact of signal control。the time the bus travel through the intersection。stop time at the last few stop stations as a result of the passengers get off and on before the predictionstop station。? lost time of slow down and speed up because of bus entering and leaving the stop at the lastfew stop stations before the prediction stop prediction model of bus arrival time travel time on sectionstravel time is defined as pure running time on sections, does not contain short delayed time because of traffic signal control, the time for passengers getting on and off on each stop station and the stoptime for vehicle technical delay time on stop stations before the prediction stop stationthe delay time at stop station denotes the lost time when they slow down and speed up because of bus entering and leaving the stop station, the time for opening the bus doors and the time occupied by passengers to get delay time as a result of the impact of signal control time the bus travel through the intersectionit is presumed that the speed of vehicles travel through kth intersection equals to the average vehicle speed of upstream section and downstream section, then the time the bus travel through the kth intersection equals the bus arrival timeconclusion???? the average travel time through the sections。queuing delay time as a result of the impact of signal control。the time the bus travel through the intersection。stop time at the last few stop stations as a result of the passengers get off and on before the predictionstop station。? lost time of slow down and speed up because of bus entering and leaving the stop at the lastfew stop stations before the prediction stop station.? finally, i find my explanation about my major is too professional for my classmates to understand, so ifind it is important to make use of examples if i want to make my audience major’s main job is making andoptimizing of this major will learn the theory of machines and build the machine based on the addition, analyzation optimization of the machine is also required in this major, which will make the machine works major deals with the whole plan of the project including investment regulation, risk control, quality and of the work makes the plan goes well and get rich 高 兵2014 3rd international conference on advanced puter theory and engineering 于2014年8月20日至2014年8月22日在四川成都的四川大學(xué)召開(kāi)，本次會(huì)議由四川省計(jì)算機(jī)學(xué)會(huì)和iacsit聯(lián)合發(fā)起，由ieee、四川大學(xué)，電子科技大學(xué)，西南交通大學(xué)，西南民族大學(xué)提供技術(shù)協(xié)助。會(huì)議旨在為科研工作者和工程技術(shù)人員提供一個(gè)報(bào)道先進(jìn)研究成果、交流學(xué)科前沿動(dòng)態(tài)的平臺(tái)。會(huì)議吸引了來(lái)自亞洲、非洲、北美、歐洲等20余個(gè)國(guó)家和地區(qū)的百余位專(zhuān)家、學(xué)者的參加，會(huì)議內(nèi)容涉及本領(lǐng)域國(guó)際最新研究動(dòng)態(tài)及前沿工作，反映了未來(lái)發(fā)展方向。會(huì)上與國(guó)際知名學(xué)者交流，感受了國(guó)內(nèi)、國(guó)際權(quán)威學(xué)者的敏銳思維、學(xué)習(xí)專(zhuān)家解決難題的靈活方式、感覺(jué)受益匪淺。大會(huì)共有600余篇poster展出，本人的第一作者論文“applicationof structuredexceptionhandlinginsoftware antidebugging ”被本次大會(huì)安排為會(huì)議首日第一個(gè)分會(huì)場(chǎng)的第一個(gè)口頭宣讀，充分體現(xiàn)了大會(huì)對(duì)本論文的重視，作為本次大會(huì)第一個(gè)宣讀的論文，本論文也得到了分會(huì)場(chǎng)主席和與會(huì)專(zhuān)家和學(xué)者的普遍好評(píng)并得到很多有益的建議，可謂收獲頗豐。具體內(nèi)容是：隨著軟件產(chǎn)業(yè)的快速發(fā)展，以反跟蹤技術(shù)為核心的軟件安全已經(jīng)成為一個(gè)重要的課題。在與軟件解密做著不懈斗爭(zhēng)的同時(shí)，軟件從業(yè)人員不斷發(fā)現(xiàn)新的軟件反跟蹤策略，提出新的軟件保護(hù)方案，增強(qiáng)了軟件的安全性。結(jié)構(gòu)化異常處理，是操作系統(tǒng)提供的用于解決系統(tǒng)軟硬件異常的一種機(jī)制，在程序設(shè)計(jì)中的合理使用可以提高軟件的穩(wěn)定性、容錯(cuò)性。本文著重探討了其在軟件反跟蹤中的應(yīng)用。應(yīng)用程序正常執(zhí)行中出現(xiàn)異常時(shí), 操作系統(tǒng)將收集異常發(fā)生的原因、類(lèi)型、位置等信息，填寫(xiě)相關(guān)的數(shù)據(jù)結(jié)構(gòu),并從用戶(hù)程序轉(zhuǎn)到系統(tǒng)級(jí)執(zhí)行,將控制權(quán)交給系統(tǒng)的異常調(diào)度函數(shù)。該函數(shù)將根據(jù)系統(tǒng)收集的異常信息選擇一個(gè)異常處理例程處理異常。用戶(hù)可定義的異常處理例程分為兩種；一種是線(xiàn)程相關(guān)的，一種是進(jìn)程相關(guān)的:線(xiàn)程相關(guān)的異常處理例程,監(jiān)視某線(xiàn)程中某段代碼是否發(fā)生異常，由于線(xiàn)程是程序執(zhí)行的最小單位，所以把異常解決于線(xiàn)程的內(nèi)部，可以避免該異常對(duì)其它線(xiàn)程的干擾，保證程序的穩(wěn)定運(yùn)行。進(jìn)程相關(guān)的異常處理例程：也稱(chēng)為篩選器，監(jiān)視進(jìn)程中所有線(xiàn)程發(fā)生的異常，做進(jìn)程退出前的清理工作。異常處理流程是指運(yùn)行在win32系統(tǒng)中的程序通常包含多個(gè)線(xiàn)程，而每個(gè)線(xiàn)程都會(huì)安裝各自的異常處理例程；除此之外，程序中可能存在一個(gè)全局性的異常處理例程；再者，如果進(jìn)程被調(diào)試的話(huà)，調(diào)試進(jìn)程也相當(dāng)于一個(gè)異常處理例程。當(dāng)異常發(fā)生時(shí)，系統(tǒng)將根據(jù)異常類(lèi)型選擇一個(gè)異常處理例程來(lái)處理異常，正常情況下，系統(tǒng)進(jìn)行異常處理的流程為：系統(tǒng)首先判斷異常是否應(yīng)發(fā)送給目標(biāo)程序的異常處理例程。如果應(yīng)該發(fā)送，并且目標(biāo)程序正在被調(diào)試．則系統(tǒng)掛起程序；如果程序沒(méi)有被調(diào)試或者調(diào)試器未能處理異常，系統(tǒng)繼續(xù)查找是否安裝了線(xiàn)程相關(guān)的異常處理例程。如果已經(jīng)安裝，系統(tǒng)就把異常發(fā)送給seh處理例程。每個(gè)線(xiàn)程相關(guān)的異常處理例程可以處理或者不處理這個(gè)異常，如果它不處理并且安裝了多個(gè)線(xiàn)程相關(guān)的異常處理例程可交由鏈起來(lái)的其他例程處理；如果這些seh處理例程均不處理異常，且程序處于被調(diào)試狀態(tài)，操作系統(tǒng)會(huì)再次通知調(diào)試器；如果程序未處于被調(diào)試狀態(tài)或者調(diào)試器沒(méi)有能夠處理，并且程序調(diào)用setunhandledexceptionfilter函數(shù)安裝了進(jìn)程相關(guān)的異常處理例程的話(huà)，系統(tǒng)轉(zhuǎn)向?qū)λ恼{(diào)用；如果沒(méi)有安裝進(jìn)程相關(guān)的異常處理例程或者它沒(méi)有處理這個(gè)異常，系統(tǒng)會(huì)調(diào)用默認(rèn)的異常處理例程，通常顯示一個(gè)對(duì)話(huà)框，用戶(hù)可以選擇“關(guān)閉”或者可以將程序附加到調(diào)試器的“調(diào)試”按鈕。如果沒(méi)有可以附加的調(diào)試器或調(diào)試器也不處理，系統(tǒng)就對(duì)線(xiàn)程異常處理句柄進(jìn)行展開(kāi)做最后的清理工作，最終調(diào)用exitprocess終結(jié)程序。通過(guò)對(duì)系統(tǒng)異常處理流程分析可知，當(dāng)應(yīng)用程序執(zhí)行過(guò)程中發(fā)生異常時(shí)，系統(tǒng)可在三個(gè)層次上完成異常處理：調(diào)試器、進(jìn)程、線(xiàn)程。線(xiàn)程層次的異常處理即seh，能夠準(zhǔn)確定位異常的信息，更加靈活、隱蔽的實(shí)現(xiàn)反跟蹤的功能，是本文研究的主要方面。下面深入分析seh的工作