可逆性

Based on the discrete logarithm problem on cyclic group Z and the intractability of reversing a one-way Hash function, an improved scheme is proposed which can satisfy alt the desired security requirements, by using a provably secure shortened signature scheme.

基于循环群Z上离散时数困难问题以及单向Hash函数的不可逆性，利用可证安全的短签名方案，设计了一个新的能弥补H-C方案安全隐患的认证加密方案。

Moreover,by means of cyclic voltammetry the electrode reaction has been studied.

此外，还用循环伏安法研究了电极反应的可逆性。

It is concluded that Daniell Cell is thermodynamically irreversible and that criterion of ΔrGm is not equal to that of E.

讨论了Daniell电池的热力学可逆性问题和电化学反应的判据问题，认为Daniell电池是热力学不可逆电池，电化学反应的ΔrGm判据与E判据并不等

Logic an attribute of a logical system that is so constituted that none of the propositions deducible from the axioms contradict one another.

内部所有的命题都不具有可逆性一个逻辑系统所具有的属性。

So, for different heater type, the general calculation model on the influence of heater terminal temperature difference on heat economy of unit is derived in the paper.

端差的存在和变化，虽没有发生直接的明显热损失，但却增加了热交换的不可逆性，产生了额外的冷源损失，降低了装置的热经济性。

An occluder around the left anterior descending arteryallowed induction of a reversible LAD-ischemia.

左前降支脉周围的阻断可诱发可逆性的 LAD 缺血。

As an asymptotic institutional transition, its advantage includes that it can avoid big mistake and promote reversibility of the reform process, be able to realize self-enhance and self diffuseness of reform, and the successful experience can be used to reduce the cost of learning and adopting during reform.

作为一种渐进式的制度变迁，其优点是可以避免大的失误，增强改革过程的可逆性；能够实现改革的自我加强和自我扩散；成功的经验可以降低改革中的学习和适应成本。

Patients with irreversible hypothyroidism require lifelong levo-thyroxin(L-T4) replacement therapy, which makes them feel discomfortable.

不可逆性甲减患者需要终身服用甲状腺激素，对患者的日常工作和生活造成了很大的不便。

The purity of SAM product was higher than 95％, and the overall recovery of SAM sulfate and SAM double salt of sulfate and p-tosylate were 60％ and 50％, respectively.

通过筛选，获得了对SAM有较好选择性离子交换能力、较易洗脱和再生的争光D113弱酸型阳离子树脂，研究了温度、pH等对SAM离子交换的影响，根据SAM在弱酸阳离子树脂D113上的等温交换平衡行为表现出较强的可逆性，考虑到交换基的弱电解质性质以及结合Donan膜平衡理论，建立了考虑pH影响的可逆离子交换平衡模型，该模型可以较好地描述SAM平衡浓度、pH对离子交换平衡的影响；通过对动态离子交换过程的研究，得到了SAM在D113树脂内的有效扩散系数的数量级为1.0E-9cm〓/s～1.0E-8cm〓/s。

Bronchial asthma is a disease that it? s behavior is reciprocity emphraxis in bronchial and it? s etiological factor is allergen or non-llergen which exists in or out.

支气管哮喘是由于外在或内在过敏原或非过敏原等因素，致使以支气管发生可逆性阻塞为特点的疾病。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。