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    • 1. 发明申请
    • Mass mail detection system and mail server
    • 大众邮件检测系统和邮件服务器
    • US20050188032A1
    • 2005-08-25
    • US11033111
    • 2005-01-12
    • Katsuyuki YamazakiHiromitsu FujikawaAkihiro NakashimaTeruaki HonmaKenichi Yoshida
    • Katsuyuki YamazakiHiromitsu FujikawaAkihiro NakashimaTeruaki HonmaKenichi Yoshida
    • G06F17/30G06F13/00G06F15/16H04L12/58
    • H04L51/12
    • The present invention is to provide a mass mail detection device that eliminates the need for preparation of rules or learning in advance and operates at a high speed. Electronic mail collecting means analyzes the electronic mail delivery protocol that flows on the network, and extracts an electronic mail main text from the electronic mail traffic that flows on the network. Next, characteristic quantity conversion means calculates a number of hash values from the electronic mail main text, as the characteristic quantity of the mail. Finally, mass mail detection means compares the newly received electronic mail with the stored past electronic mails, and determines the similarity in accordance with a specific standard. If determined as being similar, the new mail is determined as a candidate for a mass mail (similar mails), and a prescribed number or more of similar mails are determined as a mass mail.
    • 本发明是提供一种大规模邮件检测装置,其不需要预先准备规则或学习,并且高速运转。 电子邮件收集装置分析在网络上流动的电子邮件传送协议,并从网络上流动的电子邮件流量提取电子邮件主文本。 接下来,特征量转换装置计算来自电子邮件主文本的哈希值的数量作为邮件的特征量。 最后,大容量邮件检测装置将新接收到的电子邮件与存储的过去的电子邮件进行比较,并根据特定标准确定相似性。 如果确定为类似的,新邮件被确定为大量邮件(类似邮件)的候选者,并且将规定数量或更多的类似邮件确定为大量邮件。
    • 2. 发明授权
    • Mass mail detection system and mail server
    • 大众邮件检测系统和邮件服务器
    • US07853654B2
    • 2010-12-14
    • US11033111
    • 2005-01-12
    • Katsuyuki YamazakiHiromitsu FujikawaAkihiro NakashimaTeruaki HonmaKenichi Yoshida
    • Katsuyuki YamazakiHiromitsu FujikawaAkihiro NakashimaTeruaki HonmaKenichi Yoshida
    • G06F15/16
    • H04L51/12
    • The present invention is to provide a mass mail detection device that eliminates the need for preparation of rules or learning in advance and operates at a high speed. Electronic mail collecting means analyzes the electronic mail delivery protocol that flows on the network, and extracts an electronic mail main text from the electronic mail traffic that flows on the network. Next, characteristic quantity conversion means calculates a number of hash values from the electronic mail main text, as the characteristic quantity of the mail. Finally, mass mail detection means compares the newly received electronic mail with the stored past electronic mails, and determines the similarity in accordance with a specific standard. If determined as being similar, the new mail is determined as a candidate for a mass mail (similar mails), and a prescribed number or more of similar mails are determined as a mass mail.
    • 本发明是提供一种大规模邮件检测装置,其不需要预先准备规则或学习,并且高速运转。 电子邮件收集装置分析在网络上流动的电子邮件传送协议,并从网络上流动的电子邮件流量提取电子邮件主文本。 接下来,特征量转换装置计算来自电子邮件主文本的哈希值的数量作为邮件的特征量。 最后,大容量邮件检测装置将新接收到的电子邮件与存储的过去的电子邮件进行比较,并根据特定标准确定相似性。 如果确定为类似的,新邮件被确定为大量邮件(类似邮件)的候选者,并且将规定数量或更多的类似邮件确定为大量邮件。
    • 5. 发明授权
    • Apparatus for detecting deterioration of catalyst
    • 用于检测催化剂劣化的装置
    • US5280707A
    • 1994-01-25
    • US977515
    • 1992-11-17
    • Akihiro NakashimaToshiaki Mizuno
    • Akihiro NakashimaToshiaki Mizuno
    • F01N3/20F01N3/22F01N11/00F02B77/08F02D41/14F02D45/00G01M15/04
    • F01N11/007F01N2550/02F01N2900/0422Y02T10/47
    • A catalyst deterioration detection apparatus having oxygen sensors disposed in the upper stream and the lower stream from a ternary catalyst disposed in the exhaust system of an internal combustion engine, controlling so as to make the air/fuel ratio of the internal combustion engine to be in the neighborhood of a theoretical air/fuel ratio in response to an output signal from at least either of the oxygen sensors, detecting a response delay time from a moment an output signal from the upper stream oxygen sensor has been changed to a moment an output signal from the lower stream oxygen sensor has been changed when the air/fuel ratio of the internal combustion engine is changed from the rich side to the lean side or from the lean side to the rich side, and discrimination that the catalyst has deteriorated if the response delay time is shorter than a predetermined value, the catalyst deterioration detection apparatus including a device for permitting the catalyst deterioration detection apparatus to perform the detection operation if a fact that the internal combustion engine is in a predetermined operation state has been detected and a fact that the air/fuel ration has been converged to the neighborhood of the theoretical air/fuel ratio has been detected.
    • 一种催化剂劣化检测装置,其具有设置在上游的氧传感器和位于内燃机的排气系统中的三元催化剂的下游,控制使内燃机的空燃比处于 响应于来自至少一个氧传感器的输出信号的理论空燃比的邻域,检测来自上游氧传感器的输出信号的时刻的响应延迟时间已经改变到一个输出信号 当内燃机的空燃比从富侧变为稀侧或从稀侧向富侧变化时,从下游氧传感器变化,如果响应性差,则催化剂劣化的判别 延迟时间短于预定值,催化剂劣化检测装置包括用于允许催化剂劣化检测的装置 已经检测到内燃机处于预定操作状态的事实已经检测到空气/燃料比已经收敛到理论空燃比附近的事实的检测操作的装置。