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The most difficult part of Chaos System is, no well-defined system to determinate a system is a Chaos System or not, so bottlenecks happened. This study tries to use a systematic method, which might be useful to identify the Chaos System, and discusses the chaos phenomenon of the time series of a stock price trend.

浑沌理论最大的危机在於本身无强大的数学工具为基础,如此一来,所面临的瓶颈便是一个可预期且必然的结果;本研究旨在探讨个股时间序列之浑沌现象,并使用统计理论中时间序列检定方式,尝试建立一种严谨验证浑沌现象的方式。

There were three temptations and each time Christ used a part of a verse from the book of Deuteronomy.

耶稣面对三个试探,每次他都引用申命记的一节经文来胜过它。

He devoted part of his time to the study of history.

他用他的部分时间从事历史的研究。

Because there is a photoptic tetrachlorocarbon BO blue and yellow anti-alcohol consisting of green film, with the exposure time increased light part of the diazonium decomposition.

由于感平液洋有碱性素蓝BO与黄色感平剂构成的绿色膜层,随着曝平工夫加长,见平局部的重氮基搀合。

The colonializing structure actualized a dichotomization of modes of thought. This is in great part one of the consequences of negotiations, conflicts, and cooptations among elites, and transformations in those dynamics over time.

这在很大程度上是协商,冲突以及合作的后果,在随着时间而发生转换的动力之中的协商,冲突以及合作。

In this paper, the concept of network security and security structures of OSI and Internet is introduced, and various threats confronting the computer network are also discussed. Several kinds of network information security technologies, including firewall technology, virtual private network, intrusion detection system, data encryption technology, identity authentication and security protocol etc. are also examined. The security of internal network is the biggest problem in the construction of each network. The solution to this problem lies in setting up a firewall. The theory of a firewall and the approach to its actualization is studied. Intrusion detection system, an important part of the computer network security system, has gained extensive attention. IDS monitors the computer and network traffic for intrusion and suspicious activities. It not only detects the intrusion from the extranet hacker, but also the intranet users. The emergence of virtual private network paves the way for realizing secure connection of LAN quickly and at a relatively low cost. The concept, function, key techniques, including the tunnel technology, and the ways to realize VPN are expounded in this paper. Also introduced is the data encrypt network technology, which is called the soul of computer network security, such as digital digest, digital signature, digital certificate, digital encrypt arithmetic and so on. At the same time, the principle and the process of implementing network security by digital certificate and digital signature, the basic principle and characters of security protocols, and finally, three of the security protocols, concerning the security problems in network, IPsec, SLL and SET are analyzed in detail Computer network system should be a system of dynamic defence, both dynamic and static, passive as well as active, and even offensive, combined with management and technology.

本文系统地介绍了网络安全的概念、OSI及Internet的安全体系结构,并讨论了计算机网络面临的各种安全威胁;内部网络的安全问题是每个建网单位面临的最大问题,可以认为防火墙技术是解决网络安全的一个主要手段,本文研究了防火墙的原理及其实现手段;作为一种主动的防御措施,入侵检测系统作为网络系统安全的重要组成部分,得到了广泛的重视,TDS对计算机和网络资源上的恶意使用行为进行识别和响应,不仅检测来自外部的入侵行为,也监督内部用户的未授权活动;虚拟专用网技术的出现,为实现网络间的连接提供了快速安全但又相对便宜的手段,本文较深入的探讨了实现VPN的隧道技术,并对VPN的概念、功能、实现途径、基本构成、关键技术及发展前景等问题进行了全面论述;数据加密技术是网络安全核心技术之一,本文从数据加密算法、数字摘要、数字签名及数字证书等几方面简要介绍了数据加密技术,并分析用数字证书和数字签名实现网络安全的原理和过程;对安全协议的基本原理、主要特点进行了较为深入的研究,并就网络的安全性问题剖析了三种安全协议:IPsec协议、SLL协议和SET协议。

According to the demand of high magnetic field power supply, reference is increased with a set ramp rate and stops at a set stable value, so reference system is composed of digital setting and digit to analog converting circuit. But the stability of reference is mostly guaranteed by the performance of D/A circuit, so D/A circuit is particularly studied in reference system. The scheme of D/A circuit, the selection of DAC and its voltage reference, hardware anti-jamming design and PCB design are discussed in detail, and software of remote control and PLC are discussed in brief. Zero-flux DC current transformer well satisfies the demands of the high stability of Load current detection unit, so the principle of zero-flux DC current transformer is analyzed; in the mean time a project which detects the long term stability is designed. During 8 hours, analog signal which is detected with high precision digit multimeter is recorded in computer at 1HZ frequency by GPIB communication. The drift error source and related parameters are explained in the compare-amplify part. Detailed subtraction circuit is designed; also amplifier chip and periphery components are selected and verified according to the theory of error analysis.

根据强磁场电源的需求,参考源应按照软件设定的斜率逐渐上升到设定稳态值,则参考源系统应由数字给定和数模转换电路两大部分组成,而参考源的稳定度主要依靠完成数模转换功能的模拟电路的性能来保证,因此本文对参考源系统的研究以数模转换电路为重点,分别从电路方案的确定、数模转换芯片及其基准电压源的选取和验证、电路板硬件抗干扰和PCB设计几方面进行了论述,然后对数字给定部分的远控组态和PLC程序设计作了简要介绍;采用零磁通原理的直流电流转换器很好地满足了对负载电流检测单元高稳定度的需求,本文详细分析了零磁通检测的原理,并在选定此种类型电流转换器的基础上设计了一套检测长期稳定度的方案,8小时内以1秒为采样周期,通过计算机Labview程序和高精度数字电压表的GPIB通讯,将被高精度数字电压表数字化后的模拟信号采样值连续记录至计算机中;比较放大环节简要阐述了漂移产生的原因和相关参数指标,确定了具体的减法电路形式,并根据误差分析理论对运算放大器和外围元器件进行了选取和验证。

RESULTSdiabetic rats showed typical symptoms involving elevated serum glucose and weight loss (2)The rats in DM+VaD group reacted slower and made more error numbers in Y-maze than the rats in VaD group did, with a prolonged total reacting time in a whole day.(3)More neurons with serious damages, such as edema, ischemia or pyknosis could be found in DM+VaD group than in VaD group. More disarrangement of cone neurons, obvious glia proliferation, and more neuron apoptosis were found in CA area of hippocampus. CONCLUSIONS (1)2-VO in STZ-induced diabetic rats succeeded in establishing VaD animal models.(2) The cognitive dysfunction induced by VaD rats had been deteriorated by diabetes mellitus.(3)Morphology evidences proved that diabetes mellitus aggravated brain damages induced by VaD.PART II Effect of diabetes mellitus on the cholinergic nervous systemin CA1 area of hippocampus of VaDOBJECTIVE To estimate the role of cholinergic nervous system in hippocampus during the process of cognitive dysfunction aggravated by diabetes mellitus in DM+VaD group. METHODS Observe the changes of ChAT protein by immunohistochemistry stain. Chose three rats randomly from each group at each pointat two week, four week, and eight week, then sepa

经腹腔注射链脲佐菌素诱导慢性实验性糖尿病,1周后永久性结扎双侧颈总动脉(2-VO)制作VaD模型记录术后2周、4周和8周各组大鼠的体重及血糖;应用Y-迷宫检测空间定向学第二军医大学博士论文中…丈摘…要1ia;一色恤~﹁染澎糕行HE染色观察组织病理学孪叱;胶质细胞原纤维酸性蛋白protellZ,Cf冰尸标记观察星形胶质细舱的激活情况、橄声软公点娜育票票众糯黑橄居端粗默孺篇筑价井袱第二部分糖尿病对血管性痴呆大鼠海马c心区胆碱能神经系统的影响探讨海马CAI区胆碱能神经系统在糖尿病加重确D一大鼠认知障碍中所实验动物及分组同第一部分,应用免疫组织化学染色方法现察海马CAI{介狱牛第晕军l袭拔常博粗{论义

The course is divided into two parts: Part 1: Signal representations - discrete and continuous; System representations; Linear time invariant systems (Superposition, Causality, Impulse response, Stability, Transfer functions); Discrete and continuous convolution.

通过 本课程的学习,学生应能掌握信号分析与线性系统的基本理论及分析方法,应能建立简单电路与系统的数学模型,并对数学模型求解,为后续课程的学习打好基础。

By itself consists of the second part of this thesis, which provides adetailed discussion of the so-called finite-time disentanglement in bipartite sys-tems first introduced by Yu and Eberly. The results show that this phenomenonis due to the energy transfer between the system and its surroundings or dueto the internal energy transfer.

通过几个具有代表性的复合体系的退相干模型,我们的工作对复合体系有限时间的量子退纠缠进行了详细的讨论,并得到以下结论:有限时间退纠缠源于系统与其环境,以及系统内部的能量交换。

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推荐网络例句

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发,分析对称连杆曲线上鲍尔点的产生条件,提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品,年生产总值3000万美元,产品价廉物美、选料上乘、质量保证,深受国内外客户的青睐

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。