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"Poor Man's HSM" - thread-safe PKCS11 Java Security Provider |
| "Poor Man's HSM" - thread-safe PKCS11 Java Security ProviderThe addition of a PCKS11 Security Provider by Sun (http://java.sun.com/j2se/1.5. 0/docs/guide/security/p11guide.html) to its 1.5 version of the JVM is a next step to make security less home-grown and proprietary. ... |
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高速切削(HSM)技术 |
| 高速切削(HSM)技术 简介一,高速切削的原始定义 1931年,德国切削物理学家萨洛蒙(Carl.J.Salomon)博士提出了一个假设,即同年申请了德国专利(Machine with high cutting speeds)的所罗门原理:被加工材料都有一个临界切削速度V0,在切削速度达到临界速度之前,切削温度和刀具磨损随着切削速度增大而增大,当切削速度达到普通切削速度的5～6倍时,切削刃口的温度开始随切削速度增大而降低,刀具磨损随切削速度增大而减小. 切削塑性材料时,传统的加工方式为"重切削",每一刀切削的排屑量都很大,即吃刀大,但进给速度低,切削力大.实践证明随着切削速度的提高,切... |
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