Magnetic resonance imaging apparatus having vibration damping means on
gradient coil
    1.
    发明授权
    Magnetic resonance imaging apparatus having vibration damping means on gradient coil 失效
    具有梯度线圈上的减震装置的磁共振成像装置

    公开(公告)号:US5345177A

    公开(公告)日:1994-09-06

    申请号:US32665

    申请日:1993-03-17

    CPC分类号: G01R33/3854

    摘要: A magnetic resonance imaging apparatus includes a magnet for generating a static magnetic field, a gradient coil for generating a gradient magnetic field in a measurement space, and a vibration damping means which includes a container and granular material disposed in the container. The vibration damping means is installed with a supporting bolt between the gradient coil and a supporting means. Since the gradient coil is supported at a constant position without any vibration and deformation, the magnetic resonance imaging apparatus generates an accurate image signal without any acoustic noise.

    摘要翻译: 磁共振成像装置包括用于产生静磁场的磁体,用于在测量空间中产生梯度磁场的梯度线圈,以及包括容器和设置在容器中的颗粒材料的减振装置。 减震装置在梯度线圈和支撑装置之间安装有支撑螺栓。 由于梯度线圈被支撑在恒定位置而没有任何振动和变形,所以磁共振成像装置产生没有任何声学噪声的精确图像信号。

    Vibration reduction system for magnetic-resonance imaging apparatus
    2.
    发明授权
    Vibration reduction system for magnetic-resonance imaging apparatus 失效
    用于磁共振成像装置的减振系统

    公开(公告)号:US5309105A

    公开(公告)日:1994-05-03

    申请号:US910543

    申请日:1992-07-08

    CPC分类号: G01R33/3854

    摘要: A magnetic-resonance imaging apparatus has superconducting magnets for generating a large uniform magnetic field within a predetermined volume. Within that volume, coils for generating magnetic field gradients are supported on a bobbin, enabling an object within the bobbin to be investigated. The coils on the bobbin are subject to forces but are rigidly connected to the bobbin. Therefore, energy is transmitted to the bobbin which can cause the bobbin to vibrate and so generate noise. To dissipate that energy, the coils are attached to tubes, or other hollow members, on the bobbin, which tubes or hollow members contain movable bodies such as particulate material. The energy due to the forces on the coils cause the movable bodies to move and collide, so dissipating the energy and reducing the noise.

    摘要翻译: 磁共振成像装置具有用于在预定体积内产生大的均匀磁场的超导磁体。 在该体积内,用于产生磁场梯度的线圈被支撑在线轴上,使得能够调查线轴内的物体。 线轴上的线圈受力,但刚性地连接到线轴。 因此,能量被传递到筒管,这可能导致筒管振动并产生噪声。 为了消散能量,线圈被连接到线轴上的管或其它中空构件,这些管或中空构件包含诸如颗粒材料的可移动体。 由于线圈上的力引起的能量导致移动体移动和碰撞,从而耗散能量并降低噪音。

    Magnetic head slider supporting apparatus
    4.
    发明授权
    Magnetic head slider supporting apparatus 失效
    磁头滑块支持装置

    公开(公告)号:US5014144A

    公开(公告)日:1991-05-07

    申请号:US366612

    申请日:1989-06-13

    IPC分类号: G11B5/48

    CPC分类号: G11B5/4826

    摘要: An apparatus for supporting and reciprocating a magnetic head slider above a rotating magnetic disk comprises a carrying arm having a free end, a flexible base connected at one end thereof to the free end of the supporting arm, a pair of flexible fingers extending from the other end of the flexible base parallel to an axis of the carrying arm and defining therebetween a space, a traverse bar connecting two free ends of the fingers, and a flexible tongued member on which the magnetic head slider to be mounted, one end of the tongued member being connected to the traverse bar and the other end thereof extending into the space with gaps between the tongued member and the fingers and the base. A reduced part of a minimum cross-section is provided in each of the fingers. The reduced part is located between the one end of the tongued member and a center between the one end of the tongued member and the other end of the base.

    摘要翻译: 用于在旋转磁盘上方支撑和往复运动磁头滑块的装置包括具有自由端的承载臂,在其一端连接到支撑臂的自由端的柔性基座,从另一个延伸的一对柔性指状物 柔性基座的平行于承载臂的轴线的端部并且在其间限定空间,连接指状物的两个自由端的横杆以及待安装的磁头滑块的柔性舌形构件,舌头的一端 构件连接到横动杆,并且其另一端延伸到舌形构件和指状物和基部之间的间隙中。 在每个手指中设置有最小横截面的缩小部分。 缩小部分位于舌部件的一端和舌部件的一端和基部的另一端之间的中心之间。

    Vibration control apparatus
    6.
    发明授权
    Vibration control apparatus 失效
    振动控制装置

    公开(公告)号:US5450931A

    公开(公告)日:1995-09-19

    申请号:US216718

    申请日:1994-03-23

    IPC分类号: D06F19/00 F16F9/30 F16F13/08

    CPC分类号: F16F13/08 F16F9/303

    摘要: A thixotropic material is charged in a container. The container also holds a movable member which is placed in the thixotropic material so as to stir the thixotropic material. A force transmitting element is connected to the movable member. When an object, the vibration of which is to be controlled, is out of resonance, the amplitude of vibration is so small that the thixotropic material is in a gel state, thus presenting a comparatively large spring constant for the vibration control apparatus. As the excitation frequency is increased towards the resonance range, the amplitude of vibration is increased correspondingly, so that the movable member stirs the thixotropic material to generate stress in the latter, whereby the phase of the thixotropic material is changed from gel to sol. Consequently, the natural frequency of the vibration system, including the object and the vibration control apparatus, is lowered, thus averting resonance. It is thus possible to obtain vibration restraining or control effect over a wide range of excitation frequencies.

    摘要翻译: 将触变材料装入容器中。 容器还保持放置在触变材料中的可动件,以搅拌触变材料。 力传递元件连接到可动件。 当要控制其振动的物体不共振时,振动的振幅如此之小,使得触变材料处于凝胶状态,因此对于振动控制装置呈现较大的弹簧常数。 随着激发频率向共振范围增加,振动幅度相应增加,使得可动件搅动触变材料,从而在后者中产生应力,从而使触变材料的相位从凝胶变为溶胶。 因此,包括物体和振动控制装置的振动系统的固有频率降低,从而避免共振。 因此,可以在宽范围的激励频率上获得振动抑制或控制效果。

    CHARGING MEMBER, MANUFACTURING METHOD THEREFOR, A PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS
    7.
    发明申请
    CHARGING MEMBER, MANUFACTURING METHOD THEREFOR, A PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS 审中-公开
    充电会员,其制造方法,工艺盒和电子照相设备

    公开(公告)号:US20140128233A1

    公开(公告)日:2014-05-08

    申请号:US14127864

    申请日:2012-06-15

    摘要: To provide a charging member which suppresses the generation of density nonuniformity in an electrophotographic image caused by charge nonuniformity due to adhesion of charged substances, such as toner particles. There is provided a charging member which has a surface layer, the surface layer includes conductive zinc oxide whiskers each formed of a nuclear portion and four needle crystal portions extending radially outward therefrom, and the needle crystal portions are exposed to form convex portions of a surface of the surface layer.

    摘要翻译: 提供一种充电构件,其抑制由于诸如调色剂颗粒的带电物质的粘附而引起的由电荷不均匀性引起的电子照相图像中的密度不均匀性的产生。 提供了具有表面层的充电部件,表面层包括由核部分形成的导电氧化锌晶须和从其径向向外延伸的四个针状晶体部分,并且针状晶体部分暴露以形成表面的凸部 的表面层。

    Program converting device, secure processing device, computer program, and recording medium
    9.
    发明授权
    Program converting device, secure processing device, computer program, and recording medium 有权
    程序转换装置,安全处理装置,计算机程序和记录介质

    公开(公告)号:US08090956B2

    公开(公告)日:2012-01-03

    申请号:US11886576

    申请日:2006-03-27

    IPC分类号: G06F12/14

    摘要: To provide a program conversion device capable of executing a program that includes a secret operation using secret information without exposure of the secret information in a memory. In an execution program generation device, with respect to an original program that includes the secret operation, a combining function generation unit generates combining function processing for applying a bitwise self-dual function to an input value, a split secret information generation unit generates pieces of split secret information by performing an inverse operation of the self-dual function, a program conversion unit generates pieces of split secret operation processing each for performing the operation between each bit value of the operand information and a corresponding bit value of a different piece of the split secret information, and replaces the secret operation processing with the pieces of the split secret operation processing and the combining function processing.

    摘要翻译: 提供一种程序转换装置,其能够执行包含使用秘密信息的秘密操作而不在存储器中隐藏秘密信息的秘密操作的程序。 在执行程序生成装置中,对于包含秘密操作的原始程序,组合函数生成单元生成用于对输入值应用按位自双重功能的组合功能处理,分割秘密信息生成单元生成 通过执行自双重功能的反向操作来分割秘密信息,程序转换单元生成分割秘密操作处理,每个分割秘密操作处理用于执行操作数信息的每个位值和不同片段的对应位值之间的操作 分割秘密信息,并且通过分割秘密操作处理和组合功能处理来代替秘密操作处理。

    FALSIFICATION DETECTING SYSTEM, FALSIFICATION DETECTING METHOD, FALSIFICATION DETECTING PROGRAM, RECORDING MEDIUM, INTEGRATED CIRCUIT, AUTHENTICATION INFORMATION GENERATING DEVICE AND FALSIFICATION DETECTING DEVICE
    10.
    发明申请
    FALSIFICATION DETECTING SYSTEM, FALSIFICATION DETECTING METHOD, FALSIFICATION DETECTING PROGRAM, RECORDING MEDIUM, INTEGRATED CIRCUIT, AUTHENTICATION INFORMATION GENERATING DEVICE AND FALSIFICATION DETECTING DEVICE 有权
    伪造检测系统,伪造检测方法,伪造检测程序,记录介质,集成电路,认证信息生成装置和伪造检测装置

    公开(公告)号:US20100162352A1

    公开(公告)日:2010-06-24

    申请号:US12377040

    申请日:2007-11-07

    IPC分类号: G06F21/22

    CPC分类号: G06F21/64 G06F21/51

    摘要: A tamper detection device detects tampering with a program loaded to memory, at high speed and without compromising the safety. Prior to loading of a program, a dividing-size determining unit 12 determines a block size based on random number information, a dividing unit 13 divides the program by the block size into data blocks, and a first conversion unit 14 converts, by conducting a logical operation, the data blocks into intermediate authentication data no greater than the block size, and a second conversion unit 15 conducts a second conversion on the intermediate authentication data to generate authentication data. The authentication data and the block size are stored. After the program loading, a program resulting from the loading is divided by the block size, followed by the first and second conversions to generate comparative data. The comparative data is compared with the authentication data to detect tampering of the loaded program.

    摘要翻译: 篡改检测装置可以高速地检测加载到存储器的程序的篡改,而不会影响安全性。 在加载程序之前,分割尺寸确定单元12基于随机数信息确定块大小,分割单元13将程序除以块大小分成数据块,第一转换单元14通过执行 逻辑运算,将数据块转换成不大于块大小的中间认证数据,第二转换单元15对中间认证数据进行第二转换以生成认证数据。 存储认证数据和块大小。 在程序加载之后,由加载产生的程序除以块大小,然后进行第一次和第二次转换以生成比较数据。 将比较数据与认证数据进行比较,以检测加载的程序的篡改。