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操作系统实验报告-银行家算法(1).doc
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thrift of excellent traditional and style lack deep of understanding, one-sided think in now of good situation Xia, economic smooth more fast development, and reform made major progress, and people living significantly improve, and social the career made new progress, no necessary always hard has, no awareness to China also has many poverty area, and also has many poverty population of exists, more living improve has, more need keep hard of style. Three is not strictly honest. Total thought units is a water sector, clean self-discipline away from himself too far, no real processing good living of improve and hard, and thrift excellent traditional of relationship, no effective do comply with Constitution and party of regulations must from I do up, no right mercy good bitter Le, and wealth of relationship, no right awareness to in comply with Constitution and party of regulations aspects everyone has accountability. Four, future direction and improvement measures 1, belief and faith,
strengthen party spirit. One is to firmly establish the noble ideals of struggle for the ideals of communism, communist struggle for life, ready to sacrifice everything for the party and the people. Second is to continuously improve the quality and standard of political, conscientiously study Deng Xiaoping theory and "three represents" important thought and the scientific Outlook on development, implement the party's basic program for the primary stage of socialism, adhere to the correct political orientation, maintain highly consistent with the CPC Central Committee, is good at theories of socialism with Chinese characteristics to analyze and solve problems. Third, strengthening the party spirit and the world transformation, perseverance of the party Constitution, relive Party vows to establish correct world Outlook, Outlook on life and the world, practically embodies ideals and beliefs into action, combine lofty ideals and practical activities, transforming the objective world, actively
participate in the great practice of building socialism with Chinese characteristics. 2, keep the purpose in concept, changing the style of work. First, keep in mind that the purpose of serving, adhere to assuming power for the people, keep in mind the people and care about people, and the joys and sorrows of the masses, ...
According to city discipline, and municipal organization Department requirements, today we held "implement implementation independent Commission against corruption guidelines effective strengthening led cadres style construction" topic democratic life, main task is close contact thought, and work actual, control check district Standing Committee team and the personal in implementation independent Commission against corruption guidelines Shang exists of problem, in-depth carried out criticism and self-critical, further clear rectification direction and measures, effective enhanced clean politics of consciousness and initiative, firm set good of ruling image. Before the meeting, the way we take surveys solicited a views, combed, related to team building
在整体感知的基础上,学习从内容、表现技巧等方面对作品进行赏析,感悟作品的艺术魅力,获得丰富的审美感受。本单元的设置意图是在必修2古代诗歌学习的基础上,进一步提高学生的诗歌鉴赏能力。
project work, cadres, cadres selection and other aspects of a total of 19, further defined the direction of rectification, enhancing the pertinence and effectiveness of democratic life. Good for this meeting, we requested the Standing Committee of the municipal party Committee, municipal Secretary General Tang Wenjin, the City Commission for discipline inspection Standing Committee Yang Xu, Jiang Jixue, Deputy Director of the personnel office, and other leading comrades present guidance allows us to warm applause for their welcome and thanks! Below, I first District Committee member of the 20XX team annual democratic meeting implementation of the corrective measures, as well as member of the team and of my own report guidelines for the implementation of the independent Commission against corruption statement invited leaders and comrades criticism. First, annual party on the 20XX team, Member of democratic life action plan implementation year 20XX, district
democratic meeting a member of the team on "study and practice the scientific Outlook on development" theme, find a project supporting strong enough, the industry well enough, urban construction management level needs to be improved, livelihood improvement needs to be strengthened, district team itself, such as the five aspects. Year of 20XX, we find out the problems mentioned above, based on actual Shunqing construction and development, conscientiously sum up improvements, achieving significant development results and effectiveness of their work. (A) highlight the project handle, maintain high growth of investment. Adhere to the strategy as a Foundation, carrying out projects to promote increased stamina important. One is to increase the intensity of projects towards. Actively seek national and provincial policy support, superior special transfer payments, a variety of additional income will top 700 million Yuan, a number of key infrastructure projects, livelihood
projects, industrial projects into the cage. Second, increasing the project attracts. This year a total of 23 signed a major project, of which 14 billion project, China Metallurgical group, vanke group, Guangdong hengda group, Taiwan Ruentex group, on the RI group, Shenzhen Kaisa, jifeng agricultural machinery, Mercedes-Benz, Audi 4S store and other large enterprises and projects have settled in Shunqing. Third, strengthen project construction. Annual implementation focus project 39 a, fixed assets investment total will breakthrough 12 billion yuan, created district yilai history high, South door dam, and five in shop old city transformation, and Ying China industrial concentrated district construction, and city main road construction, and Northeast steam Trade Center, and modern farmers industry Park, and vocational education city, and low rental, and also room construction, and features blocks build, and farmers market transformation, and "rural version" Street transformation, focus
engineering speed up implementation, effectiveness obviously. Expected to be achieved this year, area-wide GDP 17 billion
实验四 银行家算法
实习内容
通过编程理解银行家算法,掌握进程安全性检查的方法及资源分配的方法,
加深了解有关资源申请、避免死锁等概念,体会和了解死锁和避免死锁的具体实
施方法。
实习目的
银行家算法是避免死锁的代表性算法。本实习旨在加深了解有关资源申请、
避免死锁、状态安全性等概念,并体会和运用避免死锁的具体实施方法。然后依
照本实习,自行设计模拟程序。
实习原理
算法思想:银行家算法
操作系统按照银行家制定的规则为进程分配资源,当进程首次申请资源时,
要测试该进程对资源的最大需求量,如果系统现存的资源可以满足它的最大需求
量则按当前的申请量分配资源,否则就推迟分配。
当进程在执行中继续申请资源时,先测试该进程已占用的资源数与本次申请
的资源数之和是否超过了该进程对资源的最大需求量。若超过则拒绝分配资源,
若没有超过则再测试系统现存的资源能否满足该进程尚需的最大资源量,若能满
足则按当前的申请量分配资源,否则也要推迟分配。
安全状态:如果存在一个由系统中所有进程构成的安全序列 P1,…,Pn,
则系统处于安全状态。安全状态一定是没有死锁发生。
不安全状态:不存在一个安全序列。不安全状态一定导致死锁。
实习编程思路和流程
在避免死锁的方法中,如果施加的限制条件较弱,有可能获得令人满意的系
统性能。在该方法中把系统的状态分为安全状态和不安全状态,只要能使系统始
终都处于安全状态,便可以避免发生死锁。
基本思想为:在分配资源之前,判断系统是否是安全的;若安全,才分配。它是
最具代表性的死锁算法,具体算法如下表示:
假设进程 P 提出请求 Request[i],则银行家算法按如下步骤进行判断:
1) 如果 Request[i] <=Need[i],则转向 2);否则出错。
2) 如果 Request[i] <=Available[i],则转向 3);否则出错。
3) 系统试探分配相关资源,修改相关数据:
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