Mothers may decide exclusive breast - feeding is not possible for a number of reasons - health of the mother or baby , lack of family support , work or other commitments may sometimes make exclusive or partial breast - feeding difficult 母亲会因为多种理由而决定不可能进行母乳喂养母亲或婴儿的健康状况缺乏家庭支持工作或者其它事情有时可能会使完全母乳喂养或部分母乳喂养变得十分困难。
To verify that the function indeed works as designed , we , again , need to convert each integer to binary , perform exlusive or for each bit , and then convert the result back to integer : integer binary form 110 1101110 85 1010101 - exclusive or 59 0111011 为了验证该函数确实按照所设计的方式工作，我们需要再次将每个整型数字转换成二进制数字，对每一个位执行exlusive or运算，然后将结果还原成integer ：
Secondly , some encryption algorithms are introduced , with the analysis and comparison for these encryption algorithms , the author designs an appropriate project to accomplish the end - to - end encryption . thirdly , this paper accomplish the design of an encryption scheme which combining the strongpoint of the rsa algorithm and the idea algorithm . the main process is as following : first , input the digital signal to the encryption device , and then the digital signal exclusive or with the keying sequence which is generated by key stream generator ( ksg ) and the ksg is based on the idea encrypting and deciphering algorithm , the secret key synchronization is also studied 本课题主要研究的内容是数字集群通信系统加密机制的研究,首先介绍了数字集群通信系统的安全保密机制,讲述了单向和双向鉴权的过程、单呼和群呼的空中接口加密过程及其密钥的选用和管理,特别介绍了端到端加密;然后介绍了几种常用的加密算法,通过分析其优劣,提出了端到端加密的解决方案;最后完成了基于rsa算法和idea算法的数字集群通信系统加密方案的设计,其具体过程为将经过数字信号送入加密器里,和以idea加密算法为基础设计的密码流发生器( ksg )产生的密码序列进行加解密运算,并且研究了此加密过程的密码同步问题。
