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15篇 您的检索式:作者名="Naoki Takada"
    题名 作者 年代 出处 被引量
1Real-time color holographic video reconstruction using multiple-graphics processing unit cluster acceleration and three spatial light modulators显示文摘We demonstrate real-time three-dimensional(3D)color video using a color electroholographic system with a cluster of multiple-graphics processing units(multi-GPU)and three spatial light modulators(SLMs)corresponding respectively to red,green,and blue(RGB)-colored reconstructing lights.The multi-GPU cluster has a computer-generated hologram(CGH)display node containing a GPU,for displaying calculated CGHs on SLMs,and four CGH calculation nodes using 12 GPUs.The GPUs in the CGH calculation node generate CGHs corresponding to RGB reconstructing lights in a 3D color video using pipeline processing.Real-time color electroholography was realized for a 3D color object comprising approximately 21,000 points per color.Shohei Ikawa Naoki Takada Hiromitsu Araki Hiroaki Niwase Hiromi Sannomiya Hirotaka Nakayama Minoru Oikawa Yuichiro Mori Takashi Kakue Tomoyoshi Shimobaba Tomoyoshi Ito 2020Chinese Optics Letters2020,18,1:4
2Real-time electroholography using a single spatial light modulator and a cluster of graphics-processing units connected by a gigabit Ethernet network显示文摘Systems containing multiple graphics-processing-unit(GPU)clusters are difficult to use for real-time electroholography when using only a single spatial light modulator because the transfer of the computer-generated hologram data between the GPUs is bottlenecked.To overcome this bottleneck,we propose a rapid GPU packing scheme that significantly reduces the volume of the required data transfer.The proposed method uses a multi-GPU cluster system connected with a cost-effective gigabit Ethernet network.In tests,we achieved real-time electroholography of a three-dimensional(3D)video presenting a point-cloud 3D object made up of approximately 200,000 points.Hiromi Sannomiya Naoki Takada Tomoya Sakaguchi Hirotaka Nakayama Minoru Oikawa Yuichiro Mori Takashi Kakue Tomoyoshi Shimobaba Tomoyoshi Ito 2020Chinese Optics Letters2020,18,2:2
3Tissue factor pathway inhibitor 2 (TFPI2) is frequently silenced by aberrant promoter hypermethylation in gastric cancer 显示文摘Hisashi Takada Naoki Wakabayashi Osamu Dohi 2010Cancer Genet Cytogenet2010,197,1:1
4Activation of Natural Killer T Cells Ameliorates Postinfarct Cardiac Remodeling and Failure in Mice显示文摘Mochamad Ali Sobirin Shintaro Kinugawa Masashige Takahashi Arata Fukushima Tsuneaki Homma Taisuke Ono Kagami Hirabayashi Tadashi Suga Putri Azalia Shingo Takada Masaru Taniguchi Toshinori Nakayama Naoki Ishimori Kazuya Iwabuchi Hiroyuki Tsutsui 2012Circulation Research2012,,8:1
5Color representation method using RGB color binary-weighted computer-generated holograms显示文摘We propose a method for color electroholography using a simple red–green–blue(RGB) gradation representation method without controlling the respective brightness of the reference RGB-colored lights. The proposed method uses RGB multiple bit planes comprising RGB binary-weighted computer-generated holograms with various light transmittances. The object points of a given three-dimensional(3D) object are assigned to RGB multiple bit planes according to their RGB gradation levels. The RGB multiple bit planes are sequentially displayed in a time-division-multiplexed manner. Consequently, the proposed method yields a color gradation representation of a reconstructed 3D object.Masato Fujiwara Naoki Takada Hiromitsu Araki Shohei Ikawa Yuki Maeda Hiroaki Niwase Minoru Oikawa Takashi Kakue Tomoyoshi Shimobaba Tomoyoshi Ito 2018Chinese Optics Letters2018,16,8:1
6Evidence-based clinical practice guidelines for acute pancreatitis: proposals显示文摘Toshihiko Mayumi Hideki Ura Shinjyu Arata Nobuya Kitamura Ikuo Kiriyama Kazuhiko Shibuya Miho Sekimoto Naoki Nago Masahiko Hirota Masahiko Yoshida Yasuo Ito Koichi Hirata Tadahiro Takada 2002Journal of Hepato - Biliary - Pancreatic Surgery2002,,4:1
7Biaxial Flow - Induced Alignment of Silicate Layers in Polypropylene/Clay Nanocomposite Foam 显示文摘Masami Okamoto Pham Hoai Nam Pralay Maiti Tadao Kotaka Takashi Nakayama Mitsuko Takada Masahiro Ohshima Arimitsu Usuki Naoki Hasegawa and Hirotaka Okamoto 2001Nano letters2001,1,:1
8Evolution of viscous flow around a suddenly rotating circular cylinder in the lattice Boltzmann method显示文摘Takada Naoki Tsutahara Michihisa 1998Computers & Fluids1998,27,7:1
9Biaxial Flow-Induced Alignment of Silicate Layers in Polypropylene/Clay Nanocomposite Foam显示文摘Masami Okamoto Pham Hoai Nam Pralay Maiti Tadao Kotaka Takashi Nakayama Mitsuko Takada Masahiro Ohshima Arimitsu Usuki Naoki Hasegawa and Hirotaka Okamoto 2001Nano letters2001,1,:1
10Evidence-based clinical practice guidelines for acute pancreatitis: proposals显示文摘Toshihiko Mayumi Hideki Ura Shinjyu Arata Nobuya Kitamura Ikuo Kiriyama Kazuhiko Shibuya Miho Sekimoto Naoki Nago Masahiko Hirota Masahiko Yoshida Yasuo Ito Koichi Hirata Tadahiro Takada 2002Journal of Hepato - Biliary - Pancreatic Surgery2002,,4:1
11Simplified electroholographic color reconstruction system using graphics processing unit and liquid crystal display projector 显示文摘ATSUSHI Shiraki NAOKI Takada MASASHI Niwa 2009OPTICS EXPRESS2009,17,16:1
12Real-time gradation-expressible amplitude-modulationtype electroholography based on binary-weighted computer-generated hologram显示文摘In amplitude-modulation-type electroholography, the binary-weighted computer-generated hologram(BW-CGH) facilitates the gradation-expressible reconstruction of three-dimensional(3 D) objects. To realize real-time gradation-expressible electroholography, we propose an efficient and high-speed method for calculating bit planes consisting of BW-CGHs. The proposed method is implemented on a multiple graphics processing unit(GPU) cluster system comprising 13 GPUs. The proposed BW-CGH method realizes eight-gradation-expressible electroholography at approximately the same calculation speed as that of conventional electroholography based on binary computer-generated holograms. Consequently, we were able to successfully reconstruct a real-time electroholographic 3 D video comprising approximately 180,000 points expressed in eight gradations at 30 frames per second.Ren Noguchi Kohei Suzuki Yoshiki Moriguchi Minoru Oikawa Yuichiro Mori Takashi Kakue Tomoyoshi Shimobaba Tomoyoshi Ito Naoki Takada 2021Chinese Optics Letters2021,19,11:0
13Gradation representation method using a binary-weighted computer-generated hologram based on pulse-width modulation显示文摘We propose a simple gradation representation method using a binary-weighted computer-generated hologram(CGH) to be displayed on a high-speed spatial light modulator that can be controlled by the pulse-width modulation technique. The proposed method uses multiple bit planes comprising binary-weighted CGHs with various pulse widths. The object points of a three-dimensional(3D) object are assigned to multiple bit planes according to their gray levels. The bit planes are sequentially displayed in a time-division-multiplexed manner.Consequently, the proposed method realizes a gradation representation of a reconstructed 3D object.Masato Fujiwara Naoki Takada Hiromitsu Araki Chun Wei Ooi Shohei Ikawa Yuki Maeda Hiroaki Niwase Takashi Kakue Tomoyoshi Shimobaba Tomoyoshi Ito 2017Chinese Optics Letters2017,15,6:0
14Fast time-division color electroholography using a multiple-graphics processing unit cluster system with a single spatial light modulator显示文摘We demonstrate fast time-division color electroholography using a multiple-graphics-processing-unit(GPU) cluster system with a spatial light modulator and a controller to switch the color of the reconstructing light. The controller comprises a universal serial bus module to drive the liquid crystal optical shutters. By using the controller, the computer-generated hologram(CGH) display node of the multiple-GPU cluster system synchronizes the display of the CGH with the color switching of the reconstructing light. Fast time-division color electroholography at 20 fps is realized for a three-dimensional object comprising 21,000 points per color when 13 GPUs are used in a multiple-GPU cluster system.Hiromitsu Araki Naoki Takada Shohei Ikawa Hiroaki Niwase Yuki Maeda Masato Fujiwara Hirotaka Nakayama Minoru Oikawa Takashi Kakue Tom oyoshi Shim obaba and Tom oyoshi Ito 2017Chinese Optics Letters2017,15,12:0
15High-speed playback of spatiotemporal division multiplexing holographic 3D video stored in a solid-state drive using a digital micromirror device显示文摘We propose a high-speed playback method for the spatiotemporal division multiplexing electroholographic three-dimensional(3D)video stored in a solid-state drive(SSD)using a digital micromirror device.The spatiotemporal division multiplexing electroholography prevents deterioration in the reconstructed 3D video from a 3D object comprising many object points.In the proposed method,the stored data is remarkably reduced using the packing technique,and the computer-generated holograms are played back at high speed.Consequently,we successfully reconstructed a clear 3D video of a 3D object comprising approximately 1,100,000 points at 60 frames per second by reducing the reading time of the stored data from an SSD.Kohei Suzuki Minori Tao Yuki Maeda Hirotaka Nakayama Ren Noguchi Minoru Oikawa Yuichiro Mori Takashi Kakue Tomoyoshi Shimobaba Tomoyoshi Ito Naoki Takada 2021Chinese Optics Letters2021,19,9:0
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