无环的

In th is paper, w e p ropo se a cert ificateless ring signature scheme, based on the bilinear pairings, w h ich p rovides uncondit ional anonym ity, and p rove th is scheme is existent ially un fo rgeable under adap t ive cho se2message at tack s, in the random o raclemodel, assum ing that the computat ionalD iffie2Hellman p roblem is hard to so lve.

摘 要 在这篇文章里，我们用双线性对构造了一种无证书的环签名方案，并证明它是无条件匿名的，且在随机预言模型中，计算性D iffie2Hellman 问题是难解的，我们方案在适应性选择消息攻击下是存在性不可伪造的，它的安全性比在基于身份的公钥密码体制下高。

The present invention relates to a coating composition comprising; A at least one polyester oligomer prepared from reactants comprising a 20 60 wt.% of at least one polyol, b 5 30 wt.% of at least one polycarboxylic acid selected from the group of cyclic polycarboxylic acids, the esters or the anhydrides thereof, wherein the carboxyl groups are separated by 3 carbon atoms or less, and from the group of alpha , beta -saturated acyclic polycarboxylic acids, the esters or the anhydrides thereof, and c 20 60 wt % of at least one monocarboxylic acid, the sum of the wt.% indicated for the reactants,, and always being 100 wt.%, and the oligomer being a low-viscosity oligomer having a weight average molecular weight Mw of less than 5,000, and a hydroxyl number in the range of about 200 to about 400 mg KOH/g oligomer, and B at least one polyisocyanate.

本发明涉及一种包含如下组分的涂料组合物：A至少一种由包含如下成分的反应物制备的聚酯低聚物：a20-60wt％至少一种多元醇，b5-30wt％至少一种选自其中羧基被3个或更少碳原子隔开的环状多元羧酸、其酯或酸酐以及选自α，β-饱和的无环多元羧酸、其酯或酸酐的多元羧酸，以及c20-60wt％至少一种一元羧酸，其中反应物、和的wt％之和总是为100wt％，所述低聚物是重均分子量Mw低于5000且羟基值为约200-约400mg KOH/g低聚物的低粘度低聚物，以及B至少一种多异氰酸酯。

For the infective subsystem, we obtain the existent condition of the subsystem equilibrium point and the uniqueness of the positive equilibrium point by the no infectious subsystem's conclusion and the image analysis. The partial stability of the subsystem equilibrium points is discussed by analyzing eigenvalue. The condition that the system has no limit cycle is obtained by the Dulac function.

对染病子系统，利用无病子系统所得结论及图像分析法，得到了系统平衡点的存在条件，正平衡点的存在唯一性；利用特征根方法判断了系统平衡点的局部稳定性；利用Dulac函数得到了系统不存在极限环的条件；利用极限方程理论得到了系统疾病消除平衡点和地方病平衡点的全局稳定性。

After studying the MAC protocol of Ad hoc network and by modifying the Wireless Token Ring Protocol, a new uncontested Distributed Parallel Wireless Polling Access Protocol that can provide MAC QoS guarantees for Ad hoc network is presented, and the mathematical model is established by the embedded Markov chain theory and the probability generating function method. Based on it, the mean value of queue length and message waiting time are explicitly obtained.

摘要该文对Ad hoc网络的MAC层协议进行了研究，通过对无线令牌环协议进行改进，提出了一种新的具有QoS保障的无竞争的分布式并行无线轮询访问协议，并采用嵌入Markov链和概率母函数的分析方法，用限定服务规则进行了系统建模，在系统模型的基础上得到了系统的平均排队队长以及平均等待时间的解析结果。

The analysis result proves that the design for improvement is more suitable for the design of longitudinal control laws for HALE tailless flying-wing UAV because the autopilot of flight control system is always in-the-loop, it is not necessary to consider the stability augmentation performance of control system such as traditional method.

分析结果表明，由于无人机飞控系统的自动驾驶仪是始终在环的，不必像传统方法一样考虑带有增稳的控制系统的稳定性。因此，改进的设计方法更适合于无尾飞翼式高空长航时无人机巡航状态的纵向飞行控制系统的设计。

Methods To test plasma PGI2 and TXA2 by means of RIA in all cases.One group of patients who received non-operative treatment:Six cases of patients with distant metastasis;Eight cases with hilus of long metastasis;Seven cases without metastasis.

采用放射免疫测定技术对原发性肺癌未手术组的6例远处转移，8例肺门转移，7例无转移的患者，肺癌行根治术组的6例出现远处转移，7例出现肺门转移，6例未出现转移的患者进行血浆前列环素和血栓素A2检测。

BBSF achieves the scatternet subnets merger using a tree-like but "not true tree"topology structure,and the scatternet merger control pithily and effectively.It provides a new design method of distributed dynamical net forming in multi-hop environment.

BBSF算法利用一种无环连通的&类树&的拓扑结构实现各个散列网子网之间的融合，从而对于散列网子网间的合并可以实现简洁有效的控制，在多跳环境下提供了一种新的分布式动态组网设计途径。

We suggested that the cross-linker's self-polymerization or the difference of the copolymerization capability with main monomers is an important factor, besides free end chains and looping chains, which do not contribute to gel's elastic in the network.

笔者认为：除了交联点中存在自由链端链和自封闭的环链等对网络弹性无贡献的部分外，交联剂的自聚合，或者说与主单体共聚能力的差异是一不可忽略的因素。

In order to provide service which could be used by more requesters without dead-locks under the service-oriented architecture, a method based on a message state tree was proposed to realize the reverse design of services by interactive message sequences.

在面向服务架构下，为了让更多的相关服务请求者使用用户设计的服务而不发生死锁，提出了一种基于消息状态树的方法，该方法由外部交互消息序列逆向设计无环有限次交互的服务。

These two operations were both effective in the treatment of unilateral paralysis of vocal fold, but it should be selected according to the requirement of patient, the pattern of damage, the degree of paralysis and movement of cricoarythenoid joint.

两种术式均是治疗单侧声带麻痹的有效方法，但应根据患者的要求、损伤的方式、声带麻痹程度及有无环杓关节固定等情况进行选择合适的治疗方法。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。