不可逆性

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。

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。

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 author analyses two conversion channels: market and non-market ways, puts forward five patterns: frog leaping, axial spreading, ribbon sprawling, strip subdividing and finger-shaped filling, and outlines some features listed below: high quality of...

阐述农地城市流转有市场和非市场两种途径，有蛙跳式侵占、轴式扩展、环状蔓延、条块分割与吞没和指状填充五种方式，具有优质性、地域性、同步性、不可逆性、非市场性和多重权属转移性等特性。

We use finite-time thermodynamics to study the effect of the irreversibility inside the heat engine and the thermal reservoir temperature ratio on the performance and the related parameters of a combined Carnot heat engine under the maximum thermal efficiency.

以有限时间热力学研究热机内之不可逆性和两热库间之温度比等因素对於最大循环热效率时复合卡诺热机之性能和相关参数之影响。

We use finite-time thermodynamics to study the effect of the irreversibility inside the heat engine and the thermal reservoir temperature ratio on the performance and the related parameters of a combined Carnot heat engine under the maximum ecological optimization function.

以有限时间热力学研究热机内之不可逆性和两热库间之温度比等因素对於最大生态学准则函数时复合卡诺热机之性能和相关参数之影响。

In addition, the commodity market has three apparent characteristics: investment irrevocability, indetermination of policy and economy as well as the interactivity of main body.

而且商品房市场有明显的三个特点：投资的不可逆性，经济和政策的不确定性和主体的互动性。

The former, intracranially complements patients some factors, most frequently with TH gene to compensate scanty of intrastriatal DA and improve the symptoms of the patients, while have little resistance to the progressive degeneration of dopaminergic neurons; The latter provide variety of neurotrophic factors, most specific being the glial cell-line derived neurotrophic factor , to protect the residual DA neurons in the nigrostriatal system from further pathogenic injuries, while have little benefit to those DA neurons with irreversible damage, and them cannot offset the already-existing symptoms.

前者是给宿主脑内补充某些因子，主要是DA合成过程中的限速酶TH基因，以补充纹状体内DA含量的不足，减轻患者的症状，但对DA能神经元的进行性退变没有治疗效果；后者则是提供各种神经营养因子其中最具特异性的为GDNF，以保护黑质一纹状体系统内剩余的DA能经元免受病因的继续损害但对已发生不可逆性损害的DA能神经元并无拯救作用，无法消除已出现的症状。

We haven't seen that irreversibility.

我们没有看到那种不可逆性。

It is the change from an ordered arrangement to a disordered arrangement which is the source of the irreversibility.

从有序的排列到无序排列的变化是不可逆性的起源。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。