Firstly , this dissertation discusses several essential theory issues of current information security technology . based on them , explicit authorization mechanism is put forward with accurate definition , formal model and demonstration of security properties . this part aims to describe this mechanism and its security in theory 首先,本文讨论了当前信息安全技术中存在的几个本质上的理论难题,在此基础上提出显式授权机制,并给出了该机制的准确定义、形式化模型和安全性质的证明,从理论上描述了该机制以及该机制的安全性。
This paper is based on what has been talked about before . compared with the theoretical frame of evaluation of project , in my paper , i began with the analysis of the definition of some basic conceptions , then introduced other two models of frame of evaluation , through analyzing them with some managerial ideas , i gave my own opinion . in my opinion , the frame of the system of television program ' s evaluation should include at least three parts : the time point of the evaluation , the content of the evaluation and the methods of the evaluation 如何在建立电视节目评估体系的时候，打破以往传统经验型节目评价的固有模式，如何认识节目评估体系和传统经验型节目评价在本质上的区别，以及如何科学建立节目评估体系的理论框架，最大程度体现节目评估体系对节目运作过程的多方面管理职能，从而真正实现媒介资源、社会资本的优化配置，这些问题是我们研究这一课题的起点，也是本文的研究重点。
As one of the important aspects of image fusion , multi - sensor remote - sensing image fusion ( ms - rsif ) investigates how to integrate image information from different aerial remote sensors , and generate new data , for more complete , objective , and essential cognition of the specified target 作为图像融合领域的一个重要分支，多源遥感图像融合研究的是如何综合利用不同航空遥感传感器所获取的图像信息，来产生新的数据，以获取对同一事物或目标的更为全面、客观及本质上的认识。
The shrubs on the vicarage lawn rustled uncomfortably in the frosty breeze ; she could not feel by any stretch of imagination , dressed to her highest as she was , that the house was the residence of near relations ; and yet nothing essential , in nature or emotion , divided her from them : in pains , pleasures , thoughts , birth , death , and after - death , they were the same 牧师住宅草坪上的灌木，在寒风中瑟瑟发抖她用尽了自己的想象，而且也尽可能把自己打扮漂亮了，但是想象不出那就是他的近亲住的屋子可是无论在天性还是在感情方面，都没有什么本质上的东西把她和他们分开，他们在痛苦快乐思想出生死前和死后都是一样的。
However , there is obvious difference between modern logistic pivotal city and traditional traffic pivotal city . it is an important task with of studying and discussing that how we can promote wuhan from an important traffic pivotal city into a regional or country ' s logistic pivotal city . the thesis is divided into six chapters 然而，现代意义的物流枢纽城市与传统意义上的交通运输枢纽城市存在着本质上的差别，如何将武汉市从一个全国重要的交通运输枢纽城市发展成为区域乃至全国性的物流枢纽城市，是一个值得研究和探讨的重要课题。
The tribulation was written in yuhua ` s novels befroe the nineties ` , it can be generized two points : content that it was sadly essence it was sentimental . in yuhua ` s novels showed , tribulation consciousness main is a crisis world . it discusses that after entering into the nineties ` , the tribulation in yuhua ` s novels take on a different apperance compared with before . in hard circumstances human aren ` t at a loss any longer , on the contrary , they save themselves out of tribulation with the “ living on ” optimism and tenacious life attitude . as a result , human crisis and degradation of human nature are extricated , it reflet the ultimate philosophical solicitude for human begings in yuhua ` s novels 苦难一直是余华小说反复渲染的主题，余华前期小说的苦难基本上可以概括为两点：内容上的宿命，本质上的伤感.余华笔下显示出来的苦难场景基本上是一个恶的世界， 90年代，余华转型小说中表现出来的苦难具有了新的形态和意义，人在这样的苦难中不再是茫然不知所措，而是以活着的乐观和坚韧的生存态度从苦难中拯救自己，人在人性危机和沉沦中得到了拯救，体现了作者在终极意义上的对人类的关怀。
The understanding of the advertisement information would normally vary due to factors like the information acceptor and technology , the effect of advertisement wo n ' t be influenced radically . however , if the function of decontextualization is excessively powerful and the information - spread process is out of control , it will lead to radical change of the theme of advertisement . and the information read by audience will de viate greatly from the advertiser ' s initial idea . , then the advertising information will be changed 正常情况下，广告信息的解读因环境信息接受者和技术等因素而变，广告传播效果并不由此而受本质上的影响；但如果“非语境化”作用过大，信息传播过程失控过度，将导致广告主题信息发生本质上的异变，受众解读的信息完全背离广告文本初衷，该广告信息将出现岐变。
