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    • 63. 发明授权
    • ID-based signature, encryption system and encryption method
    • 基于身份的签名,加密系统和加密方法
    • US07711113B2
    • 2010-05-04
    • US11048863
    • 2005-02-03
    • Masashi Takahashi
    • Masashi Takahashi
    • H04K1/00
    • H04L9/3073H04L9/3247
    • An ID-based encryption and signature technique, according to which more efficient and higher speed processing is possible. In generation of public parameters, an element P of a group G1 of order q is selected, and then, g=e(P, P) calculated in advance is added to the public parameters. At the time of encryption and verification, a public key ID is associated with an element PID of the group G1, using uεZq* and two elements P1 and P2 (included in the public parameters) of G1 and calculating PID=P1+uP2. The above-mentioned elements P1 and P2 are determined by P1=s1P and P2=s2P using random numbers s1, s2εZq* as a part of a master key, and a private key of a user is determined by dID=(s1+us2)−1P.
    • 基于ID的加密和签名技术,根据该技术,更有效和更高速度的处理是可能的。 在公共参数的生成中,选择阶数q的组G1的元素P,然后将预先计算的g = e(P,P)添加到公共参数。 在加密和验证时,使用u&egr; Zq *和G1的两个元素P1和P2(包括在公共参数中)将公钥ID与组G1的元素PID相关联并且计算PID = P1 + uP2 。 上述元素P1和P2由P1 = s1P和P2 = s2P使用随机数s1,s2和egr; Zq *作为主密钥的一部分来确定,用户的私钥由dID =(s1 + us2)-1P。
    • 69. 发明申请
    • Method of preparing feedstock liquid, method of preparing uranyl nitrate solution, and method of preparing polyvinyl alcohol solution
    • 制备原料液的方法,制备硝酸铀酸盐溶液的方法,以及制备聚乙烯醇溶液的方法
    • US20070178036A1
    • 2007-08-02
    • US10583906
    • 2004-12-22
    • Masashi Takahashi
    • Masashi Takahashi
    • C01G43/01
    • G21C3/58C01G43/00G21C21/00Y02E30/38
    • The object of the present invention is to provide a feedstock liquid, from which fuel kernels with good quality can be produced, and a method of preparing the feedstock liquid. The present invention provides a feedstock liquid with a viscosity from 4.0×10−2 to 6.5×10−2 Pa·s at 15° C., for the production of ammonium diuranate particles. The present invention also provides a method of preparing a feedstock liquid used for the production of ammonium diuranate particles, which includes mixing a uranyl nitrate solution and tetrahydrofurfuryl alcohol to produce a uranyl nitrate mixture, dissolving polyvinyl alcohol in water to produce an aqueous polyvinyl alcohol solution, mixing the aqueous polyvinyl alcohol solution with tetrahydrofurfuryl alcohol to produce a polyvinyl alcohol solution, and mixing the uranyl nitrate mixture with the polyvinyl alcohol solution.
    • 本发明的目的是提供一种能够生产具有良好质量的燃料颗粒的原料液以及制备原料液体的方法。 本发明提供了在15℃下具有4.0×10 -2至6.5×10 -2 Pa粘度的原料液体,用于生产碘化铵颗粒 。 本发明还提供一种制备用于生产二硫酸铵颗粒的原料液的方法,其包括将硝酸铀酰溶液和四氢糠醇混合以制备硝酸铀酰混合物,将聚乙烯醇溶解在水中以产生聚乙烯醇水溶液 将聚乙烯醇水溶液与四氢糠醇混合以制备聚乙烯醇溶液,并将硝酸铀酰混合物与聚乙烯醇溶液混合。
    • 70. 发明授权
    • Drill set for dental screw implant fixture with self-tap
    • 用于牙科螺钉植入物夹具的自动攻丝机
    • US07247020B2
    • 2007-07-24
    • US10653591
    • 2003-09-03
    • Masashi TakahashiYataro KomiyamaTakao OkadaNorio Kojima
    • Masashi TakahashiYataro KomiyamaTakao OkadaNorio Kojima
    • A61C3/02
    • A61B17/1673A61C8/0022A61C8/0089
    • A drill set for adjusting an implant hole for a self-tap dental screw implant fixture comprises with a diameter d2 at the point of a cutting blade equivalent to a diameter D3 of the tip end of the fixture, a diameter d1 at the back end of the blade equivalent to the maximum root diameter of a first male screw 1e or smaller, and a length l1 of the blade larger than the entire length L1 of the fixture 1, and the second drill 3 with a diameter d5 at the point of a tapered tip end cutting blade 3b equivalent to the diameter D3, and a diameter d3 at the back end of a tapered back end cutting blade 3a equivalent to the maximum root diameter of the first male screw 1e and smaller than the maximum crest diameter thereof, both the blades 3a, 3b forming two-step taper shape.
    • 用于调整自攻牙螺钉植入物夹具的植入孔的钻具组件包括在等于直径D 3的切割刀片的点处具有直径d 2 2 < 在叶片的后端处的直径d 1> 1等于第一外螺纹螺钉的最大根直径1e或更小,长度l 1 大于整个长度L 1 1的固定装置1的第二钻头3和锥形尖端点处的直径d 5的第二钻头3 末端切割刀片3b相当于直径D 3 3,并且锥形后端切割刀片3的后端处的直径d 3 3等于最大根直径 的第一外螺纹螺钉1e并小于其最大波峰直径,两个叶片3a,3b形成两级锥形。