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    • 53. 发明授权
    • Optical transmission system
    • 光传输系统
    • US5351148A
    • 1994-09-27
    • US67217
    • 1993-05-26
    • Kazuki MaedaNaoki IshiyamaHiroaki Nakata
    • Kazuki MaedaNaoki IshiyamaHiroaki Nakata
    • H04B10/516H04B10/2507H04B10/54H04B10/556H04B10/61H04B14/00H04J14/02H04L5/06H04N7/22
    • H04N7/22H04B10/504H04B10/5053H04B10/541H04B10/58H04J14/0298H04L5/06
    • An optical transmission system provides digital signals which have added bits for error correction by an encoder which are converted into 16-QAM signals with a predetermined carrier frequency by a modulator, and then frequency division muitiplexed with an AM signal so as to be inputted to an optical-electric converter. When the total sum of the light modulation indices of signals to be transmitted is over 1, a light modulation index of an M-QAM signal is set by calculating the light modulation index that marks the onset of diverging from the error rate given by a ratio between receiver noise power and the M-QAM signal power while considering a light modulation index corresponding to a usable transmission margin. The multiplexed signals are transmitted via optical fiber and converted into electric signals by a photo receiver, demodulated by a demodulator, and then outputted after having their errors corrected by an error corrector.
    • 光传输系统提供数字信号,该信号已经由编码器添加了用于纠错的比特,其通过调制器被转换成具有预定载波频率的16-QAM信号,然后与AM信号进行频分复用以被输入到 光电转换器。 当要发送的信号的光调制指数的总和超过1时,通过计算从由比率给出的误码率来标记发散开始的光调制指数来设置M-QAM信号的光调制指数 在接收机噪声功率和M-QAM信号功率之间考虑与可用传输余量对应的光调制指数。 多路复用信号通过光纤传输并通过光接收机转换成电信号,由解调器解调,然后在由误差校正器校正其误差之后输出。
    • 56. 发明授权
    • Printing management system and printing management method
    • 印刷管理系统和印刷管理方法
    • US08264731B1
    • 2012-09-11
    • US13468206
    • 2012-05-10
    • Hiroaki Nakata
    • Hiroaki Nakata
    • G06K1/00G06F15/00
    • G06F3/1203G06F3/1222G06F3/1239G06F3/1273G06F21/606G06F21/6209
    • According to this invention, a printing management system which manages a log of a print job includes a creation unit which creates log information for specifying a print job on the basis of issued print job data, a save unit which saves the log information created by the creation unit in a save location corresponding to the log information in a storage unit, a determination unit which determines, in accordance with a request to access the log information saved in the save unit, whether to permit or reject the access request, and an access unit which reads log information subjected to the access request when the determination unit determines to permit the access request.
    • 根据本发明,管理打印作业的日志的打印管理系统包括创建单元,该创建单元基于发布的打印作业数据创建用于指定打印作业的日志信息,保存单元,其保存由 创建单元,其与存储单元中的日志信息相对应的保存位置;确定单元,其根据访问保存在保存单元中的日志信息的请求确定是允许还是拒绝访问请求;以及访问 当确定单元确定允许访问请求时,读取经过访问请求的日志信息的单元。