-
公开(公告)号：US07567083B2
公开(公告)日：2009-07-28
申请号：US11723749
申请日：2007-03-21
IPC分类号： G01V3/00
CPC分类号： G01R33/3873 , G01R33/3806 , G01R33/3815 , G01R33/421
摘要： A super-conducting magnet apparatus in an MRI system which may reduce unevenness among magnetization characteristics of ferromagnetic elements arranged between super-conductive shield coils and superconducting main coils. There are provided a pair of super-conducting main coils, a pair of superconductive shield coils arranged on the axes of the pair of super-conducting main coils, being spaced from the pair of super-conducting main coils, and also arranged on opposite sides of a zone to be observed, and ferromagnetic elements arranged in parts of spaces extending from air core parts of the super-conducting main coils to air core parts of the super-conductive shield coils. The super-conductive shield coils have an outer diameter which is larger than that of the super-conducting main coils. The ferromagnetic elements are composed of a plurality of axially symmetric ferromagnetic members which are coaxially arranged, and which have a space in at least a radial part thereof, but not in a center axis part. With this configuration, the magnetic saturation of the ferromagnetic members may be facilitated. Thereby it is possible to reduce the effect of unevenness among magnetization characteristics of the ferromagnetic elements.
摘要翻译： 一种MRI系统中的超导磁体装置，其可以减少配置在超导体屏蔽线圈与超导主线圈之间的铁磁性元件的磁化特性之间的不均匀性。 设置有一对超导主线圈，一对超导屏蔽线圈，布置在一对超导主线圈的轴线上，与一对超导主线圈间隔开，并且还布置在相对侧 以及配置在从超导主线圈的空气芯部分延伸到超导电屏蔽线圈的空芯部分的空间的部分的铁磁元件。 超导电屏蔽线圈的外径大于超导主线圈的外径。 铁磁元件由同轴布置的多个轴向对称铁磁构件组成，并且在至少其径向部分中具有空间，但不在中心轴部分。 利用这种结构，铁磁部件的磁饱和度可以容易。 由此，能够降低铁磁性元件的磁化特性之间的不均匀性的影响。
-
公开(公告)号：US20090161426A1
公开(公告)日：2009-06-25
申请号：US12335784
申请日：2008-12-16
申请人： Chun-Yi TU , Te-Chang Tseng , Hideki Arakawa , Takeshi Nakayama
发明人： Chun-Yi TU , Te-Chang Tseng , Hideki Arakawa , Takeshi Nakayama
IPC分类号： G11C16/04
CPC分类号： G11C16/10
摘要： A memory programming method is provided. A first programming operation is performed to program a multi level cell from an initial state to a first target state, which corresponds to a storage data and has a first threshold voltage range. A flag bit of the NAND flash is set to a first state to indicate that the first programming operation has been performed. A second programming operation is performed to program the multi level cell from the first target state to a second target state, which corresponds to the storage data and has a second threshold voltage range. The flag bit is set to a second state to indicate that the second programming operation has been performed.
摘要翻译： 提供了存储器编程方法。 执行第一编程操作以将多级单元从初始状态编程到对应于存储数据的第一目标状态，并具有第一阈值电压范围。 NAND闪存的标志位被设置为第一状态以指示已经执行了第一编程操作。 执行第二编程操作以将多级单元从第一目标状态编程为对应于存储数据并具有第二阈值电压范围的第二目标状态。 标志位被设置为第二状态以指示已经执行了第二编程操作。
-
公开(公告)号：US20080271352A1
公开(公告)日：2008-11-06
申请号：US10585870
申请日：2005-01-19
申请人： Takeshi Nakayama , Akira Abe , Dai Shimizu , Fumihiro Itoshima , Kazuo Harada , Masahiro Oda , Yasuhiro Makii
发明人： Takeshi Nakayama , Akira Abe , Dai Shimizu , Fumihiro Itoshima , Kazuo Harada , Masahiro Oda , Yasuhiro Makii
IPC分类号： G09F13/02
摘要： There is provided a traffic sign apparatus that can improve the luminance of a sign surface which emits light by ultraviolet irradiation, and the uniformity ratio of illuminance, so as to enhance the visibility thereof in the nighttime. The traffic sign apparatus 10 includes a sign body 11 having the sign surface 14 which emits light by ultraviolet irradiation, and an irradiation device 12 for irradiating ultraviolet rays onto the sign surface 14. Assuming that the maximum incident angle of the ultraviolet rays be θ1, the ultraviolet rays being irradiated from the ultraviolet emission lamps 26 of the irradiation unit 12 onto the objective sign surfaces W1 and W2 on the sign surface 14 which is the irradiation object of the ultraviolet emission lamps 26; and that the minimum incident angle be θ2, the angle θ1 is set to more than 30° and less than 70°; and the angle θ 2 is set to more than 5° and less than 30°.
摘要翻译： 提供一种交通标志装置，其可以通过紫外线照射提高发光的标志面的亮度和照度的均匀性，从而提高夜间的可见度。 交通标志装置10包括具有通过紫外线照射发光的标志面14的标志体11和用于将紫外线照射在标志面14上的照射装置12。 假设紫外线的最大入射角为θ1，则从照射单元12的紫外线发射灯26照射到作为照射对象的标志面14上的物体标记面W 1，W 2上的紫外线 的紫外线发射灯26; 并且最小入射角为θ2，将角度θ设定为大于30°并小于70°; 并且角度θ2设定为大于5°且小于30°。
-
公开(公告)号：US07436179B2
公开(公告)日：2008-10-14
申请号：US11513375
申请日：2006-08-31
申请人： Ryuya Ando , Mitsushi Abe , Takeshi Nakayama , Tsutomu Yamamoto
发明人： Ryuya Ando , Mitsushi Abe , Takeshi Nakayama , Tsutomu Yamamoto
IPC分类号： G01V3/00
CPC分类号： G01R33/421 , G01R33/3806
摘要： A magnet device has main coils in a pair positioned facing each other to form a static magnetic field space in between and external magnetic flux shielding coils placed coaxially to the main coils. The external magnetic flux shielding coils have a first coil group having a small coefficient of coil coupling and a second coil group having a coefficient of coil coupling greater than that of the first coil group. The first coil group is connected in series to the second coil group. External magnetic flux entering the magnetic field imaging space formed by main coils in a pair positioned facing each other is effectively warded off.
摘要翻译： 磁体装置具有彼此面对的主线圈，以在其间形成静磁场空间，并且与主线圈同轴放置的外部磁通屏蔽线圈。 外部磁通屏蔽线圈具有线圈耦合系数小的第一线圈组和具有大于第一线圈组的线圈耦合系数的第二线圈组。 第一线圈组与第二线圈组串联连接。 有效地消除了进入由成对定位的主线圈形成的磁场成像空间的外部磁通。
-
公开(公告)号：US20080100295A1
公开(公告)日：2008-05-01
申请号：US11723749
申请日：2007-03-21
IPC分类号： G01R33/3815
CPC分类号： G01R33/3873 , G01R33/3806 , G01R33/3815 , G01R33/421
摘要： A super-conducting magnet apparatus in an MRI system which may reduce unevenness among magnetization characteristics of ferromagnetic elements arranged between super-conductive shield coils and superconducting main coils. There are provided a pair of super-conducting main coils, a pair of superconductive shield coils arranged on the axes of the pair of super-conducting main coils, being spaced from the pair of super-conducting main coils, and also arranged on opposite sides of a zone to be observed, and ferromagnetic elements arranged in parts of spaces extending from air core parts of the super-conducting main coils to air core parts of the super-conductive shield coils. The super-conductive shield coils have an outer diameter which is larger than that of the super-conducting main coils. The ferromagnetic elements are composed of a plurality of axially symmetric ferromagnetic members which are coaxially arranged, and which have a space in at least a radial part thereof, but not in a center axis part. With this configuration, the magnetic saturation of the ferromagnetic members may be facilitated. Thereby it is possible to reduce the effect of unevenness among magnetization characteristics of the ferromagnetic elements.
摘要翻译： 一种MRI系统中的超导磁体装置，其可以减少配置在超导体屏蔽线圈与超导主线圈之间的铁磁性元件的磁化特性之间的不均匀性。 设置有一对超导主线圈，一对超导屏蔽线圈，布置在一对超导主线圈的轴线上，与一对超导主线圈间隔开，并且还布置在相对侧 以及配置在从超导主线圈的空气芯部分延伸到超导电屏蔽线圈的空芯部分的空间的部分的铁磁元件。 超导电屏蔽线圈的外径大于超导主线圈的外径。 铁磁元件由同轴布置的多个轴向对称铁磁构件组成，并且在至少其径向部分中具有空间，但不在中心轴部分。 利用这种结构，铁磁部件的磁饱和度可以容易。 由此，能够降低铁磁性元件的磁化特性之间的不均匀性的影响。
-
公开(公告)号：US07129613B2
公开(公告)日：2006-10-31
申请号：US11074745
申请日：2005-03-09
IPC分类号： H02K17/16
CPC分类号： H02K17/165
摘要： A rotor conductor upper portion positioned near to an outer periphery of a rotor has a trapezoidal, cross sectional shape, a rotor conductor lower portion positioned nearer to a center of the rotor than the rotor conductor upper portion has a rectangular, cross sectional shape, and the rotor conductor upper portion has a height h1=27 mm or more in the case where rotor conductors are made of brass, and a height h1=7 mm or more in the case where the rotor conductors are made of copper.
摘要翻译： 位于转子的外周附近的转子导体上部具有梯形截面形状，与转子导体上部具有矩形横截面形状相比位于转子中心更靠近转子的转子导体下部，以及 转子导体上部在转子导体由黄铜制成的情况下的高度h 1 = 27mm以上，在转子导体为铜的情况下的高度h 1 = 7mm以上。
-
公开(公告)号：US06882078B2
公开(公告)日：2005-04-19
申请号：US10775227
申请日：2004-02-11
CPC分类号： H02K17/165
摘要： A rotor conductor upper portion positioned near to an outer periphery of a rotor has a trapezoidal, cross sectional shape, a rotor conductor lower portion positioned nearer to a center of the rotor than the rotor conductor upper portion has a rectangular, cross sectional shape, and the rotor conductor upper portion has a height h1=27 mm or more in the case where rotor conductors are made of brass, and a height h1=7 mm or more in the case where the rotor conductors are made of copper.
摘要翻译： 位于转子的外周附近的转子导体上部具有梯形截面形状，与转子导体上部具有矩形横截面形状相比位于转子中心更靠近转子的转子导体下部，以及 转子导体上部在转子导体由黄铜制成的情况下的高度h 1 = 27mm以上，在转子导体为铜的情况下的高度h 1 = 7mm以上。
-
公开(公告)号：US20050068139A1
公开(公告)日：2005-03-31
申请号：US10950392
申请日：2004-09-28
IPC分类号： G01R33/3815 , A61B5/055 , G01R33/38 , G01R33/3875 , G01R33/421 , H01F6/00 , H01F5/00
CPC分类号： G01R33/3806 , G01R33/3815
摘要： Main coils, counteracting coils and correction coils, each forming superconducting coil, are enclosed in two cooling medium chamber facing to each other and an imaging region is formed between the two cooling medium chamber positioned in each vacuum chamber, the main coils being divided into two pieces to reduce the current density and the maximum experience magnetic filed and compression stress.
摘要翻译： 每个形成超导线圈的主线圈，反作用线圈和校正线圈被封闭在彼此相对的两个冷却介质腔中，并且在位于每个真空室中的两个冷却介质室之间形成成像区域，主线圈被分成两个 减少电流密度和最大体积磁场和压缩应力。
-
公开(公告)号：US06630776B2
公开(公告)日：2003-10-07
申请号：US10025929
申请日：2001-12-26
IPC分类号： H01J2980
CPC分类号： H01J29/073 , H01J2229/0716 , H01J2229/0772
摘要： A shadow mask includes a substantially rectangular effective region formed having a number of electron beam passage apertures and opposed to a phosphor screen and a substantially rectangular skirt portion provided around the effective region and extending in the direction of a tube axis. The skirt portion has a pair of long sides extending substantially parallel to a major axis and a pair of short sides extending substantially parallel to a minor axis, the long and short sides being welded to the inner surface of a substantially rectangular mask frame. A distance a from an extending end of the skirt portion on each long side to the weld spot is longer than a distance b from an extending end of the skirt portion on each short side to the weld spot.
-
60.发明授权
公开(公告)号：US5870419A
公开(公告)日：1999-02-09
申请号：US996254
申请日：1997-12-22
申请人： Takeshi Nakayama
发明人： Takeshi Nakayama
CPC分类号： H01S5/0421 , H01S5/20 , H01S5/0425 , H01S5/12 , H01S5/2004 , H01S5/2231 , H01S5/3216
摘要： A double heterojunction semiconductor laser includes a semiconductor substrate of a first semiconductor material having a first conductivity type; successively disposed on the semiconductor substrate, a first cladding layer of the first conductivity type, an active layer, and a second cladding layer of a second conductivity type, opposite the first conductivity type, the second cladding layer having a central ridge including side surfaces and a top surface; a current blocking layer of the first conductivity type disposed on the second cladding layer and contacting the side surfaces of the ridge; a second conductivity type contact layer of the first semiconductor material disposed on the top surface of the ridge and on the current blocking layer; and first and second electrodes contacting the semiconductor substrate and the contact layer, respectively, wherein at least one of the first and second cladding layers is a superlattice layer including a plurality of alternating layers of different compositions, the superlattice layer lattice matching with the first semiconductor material.
摘要翻译： 双异质结半导体激光器包括具有第一导电类型的第一半导体材料的半导体衬底; 依次配置在所述半导体基板上，与所述第一导电型相反的第一导电型的第一包层，第二导电型的有源层和第二包层，所述第二包层具有包括侧面的中心脊， 顶面 所述第一导电类型的电流阻挡层设置在所述第二覆层上并与所述脊的侧表面接触; 所述第一半导体材料的第二导电型接触层设置在所述脊的顶表面上和所述电流阻挡层上; 以及分别与所述半导体衬底和所述接触层接触的第一和第二电极，其中所述第一和第二覆层中的至少一个是包括多个不同组成的交替层的超晶格层，所述超晶格层晶格与所述第一半导体 材料。
-
-
-
-
-
-
-
-
-
搜索结果
134 条记录 (耗时 0.025 秒)
