不可实现的

The digital signature is the powerful safeguard of the developing of E-business. It plays an important role in realizing the functions of identification anthentication, data integrity and denying the disavowal.

数字签名是开展电子商务的有力保障，在实现身份认证、数据完整性和不可抵赖性等功能方面都有重要作用。

But because the standard has the bug of illegibility and delay, we sometimes can't exactly tell the level of the educational choice.

但实践的评判标准具有模糊性、滞后性的缺陷，并且实现了的教育总是唯一的，这导致了教育选择水平的高低具有某种程度上的不可判断或不可证性，教育选择主体可以种种理由和借口而推卸自己本应承担的责任。

N[1] and[2], the classification theory of indices set of irreducible nonnegative matrices isstudied,according to that theory . An algorithm for the period and the classification of indices setof irreducible nonnegative matrices are given. Using this algorithm.

文［1］和［2］讨论了不可约非负矩阵指标集的分类理论，在此基础上，本文给出了不可约非负矩阵的周期与指标集的分类算法，这一算法能同时求出周期与同余类，当矩阵的阶不大时，该算法容易在图上实现。

The interest conflicts among land-oligarchs, industry-oligarchs and workers and farmers are nonnegotiable and lead to the dilemma of transaction-impossible. Therefore, the country has to militarize the state and grab resources from outside forcibly, in order to mitigate internal conflicts and achieve equal interest distribution at home.

国内土地、工业寡头以及工农的利益不可调和，出现了不可交易困局，因而通过军事化国家的方式来用强力从外部获取资源，缓和国内的矛盾，实现国内利益的分配。

Inthe paper, the blind inspection is executed by using modular arithmetic, namely, modulus 2arithmetic.(The result is 0 or 1). A algorithm with high transparency and robustness is realizedby smartly combining this arithmetic with binary chaotic sequence.

文中利用模数运算实现了音频水印的盲检测，即利用模2 运算，模2 取余(所得结果为0 或1)，很巧妙地将这种运算与二值化的混沌水印序列相结合，实现了一种不可感知度高，嵌入量大的高鲁棒性水印算法。

Real estate has several characteristic such as unseparated, unremovable, which prevent us from maximizing profit and excelarate the practical contradict between resources scarcity and population exparasion.

不动产的不可分性、不可移动性等固有物理缺陷使得其相关权益无法实现效益最大化，加剧了资源希缺与人口膨胀的现实矛盾。

Aiming at the actual need of impeach work, and on the basis of analyzing, concluding, summarizing and informing against the systematic current situation at present, the article structure the new model of electronic impeaching system, adopt group signature and bit commitment technology to realize each functions of the system respectively, and guarantee the security of accuser, such as anonymity, unforgeability, undeniable, unlinkability,traceability,etc.

论文针对检举工作的实际需要，在分析、归纳、总结了当前检举系统现状的基础上，构造了新型电子检举系统的模型，并分别采用群签名和比特承诺技术实现了系统的各项功能，保证了匿名性、不可伪造性、不可否认性、不相关性和可追踪性等安全性。

How to assure unverifiable objects by the right cooperative form, and what are the constraints to which outsourcing target subjects in this form?

当企业外包中存在不可验证性的目标时应该采取何种合作形式来确保目标的实现，同时实现这些目标的方式对目标本身又会有哪些限制？

In view of these shortcomings this frequency meter has made the radical innovation in the design its merit is: Uses the core component is the advanced monolithic special-purpose frequency measurement component -- monolithic frequency meter the integration rate is high the volume is small consumes the electricity province function has realized the frequency meter high integration and the microminiaturization; So long as the monolithic frequency meter adds on the crystal oscillator the measuring range choice the frequency demonstrated and so on the very few components then constitute DC to the 10MHz miniature basic frequency measurement electric circuit; But the biggest merit was this frequency meter has realized monolithic frequency meter frequency sampling electric circuit and the monolithic microcomputer three between hardware and the software connection completely caused the frequency measurement measuring range the choice the frequency data survey the sampling as well as the code frontier transformation and the data dump possible monolithic microcomputer software programming automatically to carry on thus has realized the frequency measurement and the sampling work intellectualizes completely causes this system already to be possible to constitute a miniature intelligence to measure rate the instrument core electric circuit independently also might take in the large-scale automatic control or a test system intelligent subsystem.

摘要传统的测频仪器体积很大，耗能量大，主要靠手工操作，而最大的缺点是不可编程，其量程转换、数据测量、采样控制和处理等均不能通过程序指令来进行控制，无法作为一个微型智能子系统与某一大型自动控制或测试系统进行接口。针对这些缺点，本频率计再设计上作了根本的革新，其优点是：所用核心器件是先进的单片专用测频器件——单片频率计，集成度高，体积小，耗电省，功能强，实现了频率计的高度集成化和微型化；单片频率计只要加上晶振、量程选择、频率显示等很晌慰的器件即可构成一个DC至10MHz的微型基本测频电路；而最大的优点则是本频率计完全实现了单片频率计、频率采样与单片微机三者之间的硬件与软件接口，使得测频量程的选择、频率数据的测量、采样以及编码的边境转换和数据的转储均可能过单片微机的软件编程自动进行，从而实现了测频与采样工作的完全智能化，使得本系统既可独立构成一个微型智能测率仪器的核心电路，也可作为大型自动控制或测试系统中的一个智能子系统。关键词高度集成化，单片机，频率计，电路

Monitoring the efficiency of thermal cycle is quite difficult because some of the parameters are not amenable for measuring, especially the variation of the efficiency caused by the worsening of the vacuum of the condenser.

汪健热力循环经济性能指标的在线监测由于受到某些不可测参数的限制而不易实现，尤其是凝汽器真空变化所引起的指标变化很难实现在线监测。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。