可逆的

In Chapter 2, we determine the straight line which generates the fixed point of a given invertible substitution.

已知一个可逆代换的不动点是Sturmian序列，而且Sturmian序列可由平面上的一条直线与单位方格的交点生成。

According to classical thermodynamics, the energy relations between forward and reverse Carnot cycles between two isothermic reservoirs satisfy the principle 'it is equal in quantity and opposite in direction'.

按经典热力学，工作在两恒温热源间的正、反卡诺循环能量满足：&大小相等，方向相反&的原则，而实际热机、制冷机与热泵，由于热阻、摩擦、涡流、热漏等不可逆因素的存在，正、反卡诺循环能量不再满足此原则。

There were positive correlation between eIF4E and cyclin D〓 in head and neck tumours, eIF4E overexpression could improve cyclin D〓 translation and expression in malignant tumours to maladjust cell cycle and induce canceration.

提示了在恶性肿瘤发生发展中eIF4E可以通过调控cyclin D〓的表达来影响细胞周期活动，使正常的细胞增殖周期失调，细胞进程变得不可逆，从而导致了恶性肿瘤的发生。

This paper presents a new method of digital image sharing.Firstly,construct a reversible matrix,decompose a secret image into several scrambling and encryption images at one time by matrix operation,then camouflage them into several megascopic and meaningful carrier images to store or transfer.This algorithm combines the scrambling technique,encryption technique,information hiding and sharing technique,but with much simpler algorithm,less computation time,smaller pixel expansion,better recovery effect.The results show that the algorithm has application value in the field of secret image storage and transmission.

提出一种数字图像分存方法，首先构造可逆矩阵，并通过矩阵运算直接将秘密图像分解成几幅等大小的置乱加密图像，然后分别将它们伪装在几幅经过放大且有意义的载体图像中，实现了图像分存，文中将置乱加密、信息隐藏、分存技术三者有机结合，整个算法实现简单，运算量小，数据膨胀率低，安全性高，秘图恢复效果较好，大量实验也验证了算法的有效性。

Then we transformed mTn-lacZ/LEU2 transposon library into the YES2MTM1 strain. Transformants lost the plasmid overexpressing MTM1 after 5-Fluoroorotic acid treatment. We picked up the yeast strains able to grow on nonfermentable carbon source with MTM1 deletion and some transposon insertion and identified the insertion sites.

因MTM1基因的缺失造成的损伤不可逆，直接转入文库无法筛选得到MTM1 基因缺失表型相关基因，本研究利用外源MTM1基因菌株和mTn-lacZ/LEU2酿酒酵母转座子文库进行筛选，寻找能挽救mtm1突变体生长缺陷的转座子插入位点。

Based on physicochemistry,work and heat in the processes of irreversible cell were discussed by thermodynamical method.

在基础物理化学的基础上，用热力学方法讨论了不可逆电池过程的功和热，给出了计算公式，并推广到无副反应的电解过程。

Superficial Approach to Common Disease in Quality of Highway Engineering and Precontrol of Them;2. This paper describes a complex control scheme combined with feed forward precontrol and feedback monitor control to realize the automatic Control of sendzimir reversible cold-mill.

采用前馈预控、反馈监控的复合控制实现甘辊可逆冷轧机的AGC；并在新的厚控模型基础上提出改进措施，克服了经典厚控方法在动态过程和系统在线参数辨识中精度差、计算量大等局限。

Expression of CB and PV in adult rat OB was regulated reversibly by deafferentation induced by Triton.

大鼠嗅球中CB和PV的表达受triton诱导的传入神经阻滞的可逆调控。

A three-unite hydrogel that had a thermoresponsive shape memory was prepared by copolymerizing a hydrophobic monomer n-stearyl acrylate with n- undecylenic acid and acrylamide,and its structure and properties were studied by X-ray diffraction,DSC and DMA.

选用疏水性单体丙烯酸十八酯和十一烯酸以及亲水性单体丙烯酰胺制备了三元共聚凝胶P(SA-co-AM-co-HA)，通过X射线衍射、DSC、DMA等对三元凝胶的结构和性能进行了研究，发现三元凝胶形成了有序排列，这种有序排列会随着温度的变化发生可逆转变，从而使凝胶显示较好的形状记忆特性。

Results:Low frequency ultrasound of 9w/cm2,220KHz irridiating the embryos could not cause significant hyperthemia.Three kinds of electrocardigram were detected after irridiating embryos:tachycardia for some minutes,disturbing rhythm of the heart and unrecovered slow rhythm of heart.Unrecovered slow rhythm of heart sound appeared in 77.5%embryonic electrocardiogram when irridiating for ten minutes without temperature rise found.

结果：应用9W/cm2、220KHz的超声辐照时间在10分钟内，均不会导致胚胎温度的异常升高；超声辐照后胚胎心电出现三种变化形式即心率加快后恢复正常、心律紊乱和不可逆转的心率变慢，其中辐照10分钟，有77.5%胚胎出现不可逆心电变慢且无异常温度升高。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。