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感光材料 1991年第1期 9-13页

作者： F.lshü t.uchida M.Fujiwara t.Nimura 刘春艳

在常规卤化银彩色负片中,广泛使用带色成色剂是为了得到良好的彩色还原。其原理是,利用带色成色剂修正不理想染料影像的吸收。带色成色荆也可用来改善基本影像质量——清晰度。带色成色剂的模糊蒙片作用与边缘效应一样,可使胶片的清晰... 详细信息

在常规卤化银彩色负片中,广泛使用带色成色剂是为了得到良好的彩色还原。其原理是,利用带色成色剂修正不理想染料影像的吸收。带色成色荆也可用来改善基本影像质量——清晰度。带色成色剂的模糊蒙片作用与边缘效应一样,可使胶片的清晰度得到改善。

关键词：成色剂带色成色剂模糊蒙片

Scene word recognition from pieces to whole

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Frontiers of Computer Science 2019年第2期13卷 292-301页

作者： Anna ZHU Seiichi uchida SCSt Wuhan University of Technology Wuhan 430000 China ISEE-AIt Kyushu University Fukuoka 819-0395 Japan

Convolutional neural networks (CNNs) have had great success with regard to the object classification problem. For character classification, we found that training and testing using accurately segmented character regions with CNNs resulted in higher accuracy than when roughly segmented regions were used. therefore, we expect to extract complete character regions from seene images. text in natural scene images has an obvious contrast with its attachments. Many methods attempt to extract characters through different segmentation techniques. However, for blurred, occluded, and complex background cases, those methods may result in adjoined or over segmented characters. In this paper, we propose a scene word recognition model that integrates words from small pieces to entire after-cluster-based segmentation. the segmented connected components are classified as four types: background, in dividual character proposals, adjoined characters, and stroke proposals. Individual character proposals are directly inputted to a CNN that is trained using accurately segmented character images. the sliding window strategy is applied to adjoined character regions. Stroke proposals are considered as fragments of entire characters whose locations are estimated by a stroke spatial distribution system. then、the estimated characters from adjoined characters and stroke proposals are classified by a CNN that is trained on roughly segmented character images. Finally, a lexicondriven integration method is performed to obtain the final word recognition results. Compared to other word recognition methods, our method achieves a comparable performance on Street View text and the ICDAR 2003 and ICDAR 2013 benchmark databases. Moreover, our method can deal with recognizing text images of occlusion and improperly segmented text images.

关键词： text recognition convolutional neural networks cluster-based segmentation character integration

Development of vacuum die-casting process

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China Foundry 2009年第2期6卷 137-144页

作者： Masashi uchida technical Development Center Ube Machinery CorporationLtd.1980 Aza OkinoyamaOaza KogushiUbeYamaguchi 755-8633 Japan

the vacuum die-casting process,started 25 years ago in Japan,has been widely *** technology contributes very much to improvement of castings *** main factor causing the defects of die castings is the trapped air in the mold cavity,while the key technology of vacuum die-casting process is to avoid the trapped air effectively by evacuating the cavity before *** the same time,due to the shot speed and the casting pressure reduced in half,the service life of the die is prolonged and the productivity is enhanced,as *** die-casting process is of great signif icance in improving the die castings quality and making up the shortcomings of super-high-speed shot casting.

关键词： vacuum die-casting die tooling GF process

transport mechanism in chemically reactive hybrid nanofluid flow containing gyrotactic micro-organisms over a curved oscillatory surface

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 177-192页

作者： M.NAVEED M.IMRAN t.ASGHAR Z.ABBAS Department of Mathematics Division of Science and TechnologyUniversity of Education Department of Mathematics The Islamia University of Bahawalpur

this paper examines the transport analysis, including both heat transfer and mass transfer, in hybrid nanofluid flow containing gyrotactic microorganisms towards a curved oscillatory surface. the influence of magnetic fields is also inspected in terms of their physical characteristics. to depict the phenomena of transport, modified versions of both Fick's and Fourier's laws are used. Additionally, the characteristics of both heterogeneous and homogeneous chemical reactions are also incorporated. Utilizing a curvilinear coordinate system, the flow problem is formulated as partial differential equations(PDEs)for momentum, concentration, microorganism field, and energy. An analytical solution to the obtained flow equations is achieved utilizing the homotopy analysis method(HAM).the effects of significant flow parameters on the pressure and microorganism fields, velocity, oscillation velocity, concentration, and temperature distributions are shown via graphs. Furthermore, the variations in skin friction, mass transfer rate, heat transfer rate, and local motile number due to different involved parameters are presented in tables and are analyzed in detail. Graphical results indicate that the curves of velocity and temperature fields are enhanced as the values of the solid volume fraction variables *** is also verified that the concentration rate field decreases as the values of the homogeneous reaction strength parameter and the radius of curvature parameter increase, and it increases with the Schmidt number and the heterogeneous reaction strength *** outcomes show a favorable response of the motile number to advanced values of the Peclet number, the Schmidt number, the microorganism difference parameter, and the bio-convective Lewis number.

关键词： hybrid nanofluid oscillating curved stretchable sheet gyrotactic microorganism Cattaneo-Christov heat and mass flux chemical reaction analytical solution O368

the benefits of being dominant:health correlates of male social rank and age in a marmot

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Current Zoology 2022年第1期68卷 19-26页

作者： Kenta uchida Rachel NG Samuel A.VYDRO Jennifer E.SMItH Daniel t.BLUMStEIN Department of Ecology&Evolutionary Biology University of CaliforniaLos AngelesCA 90095-1606USA Department of Biology Mills CollegeOaklandCA 94613USA the Rocky Mountain Biological Laboratory Crested ButteCO 81224USA

the benefits of dominance may not come without costs,particularly for *** example,the“immunocompetence handicap hypothesis”states that males with enhanced mating success allocate resources to enhance reproductive output at a cost to their current health,whereas the“resource quality hypothesis”predicts that high-ranking males may benefit from increased reproduction and good *** the predictions from each have been well tested in captive animals and in a variety of highly social primates,fewer studies have been carried out in free-living,facultatively social *** adult male yellow-bellied marmots(Marmota flaviventer),we evaluated predictions of these hypotheses by examining the relationship between social rank and 2 health indicators—fecal glucocorticoid metabolite(FCM)levels,and neutrophil/lymphocyte(N/L)ratios—after accounting for variation explained by age,body mass,and *** found that higher-ranking males tended to have a lower N/L ratio(reflecting good health)than lower-ranking individuals,whereas FCM levels were not significantly related to *** addition,heavier male marmots had lower N/L ratios,whereas body mass was not associated with FCM *** also found that older adult males had lower FCM levels(reflecting less physiological stress)but higher N/L ratios than younger ***,we found that FCM levels decreased as the active season progressed and FCM levels were associated with the time of the ***,our results suggest that socially-dominant male marmots enjoyed better,not worse health in terms of lower N/L ratios.

关键词： immunocompetence handicap hypothesis life history trade-offs N/L ratio physiological stress resource quality hypothesis

Formation of St Plasmas by ECH on LAtE

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Plasma Science and technology 2004年第4期6卷 2364-2366页

作者： M.uchida t.Maekawa H.tanaka H.Igami t.Yoshinaga K.Katsuura M.Konno Kyoto University Kita shirakawa Oiwake-choKyoto 606-8502JapanKyoto UniversityKita shirakawa Oiwake-choKyoto 606-8502JapanKyoto UniversityKita shirakawa Oiwake-choKyoto 606-8502JapanKyoto UniversityKita shirakawa Oiwake-choKyoto 606-8502JapanKyoto UniversityKita shirakawa Oiwake-choKyoto 606-8502JapanKyoto UniversityKita shirakawa Oiwake-choKyoto 606-8502JapanKyoto UniversityKita shirakawa Oiwake-choKyoto 606-8502Japan

Experiments on formation of spherical tokamak (St) plasmas by electroncyclotron heating (ECH) alone without a central OH solenoid have been carried out on LAtE (LowAspect ratio torus Experiments). By injecting a 2.45 GHz microwave pulse of 6.3 kW for 4 seconds, aplasma current is initiated and ramped up to I_p approx= 3 kA, and finally maintained for 1 secondby adjusting the external vertical field. Magnetic measurements show that closed flux surfaces areformed and the last closed flux surface has an aspect ratio of A ～ 1.3 and an elongation of κ～1.3. the electron density measured by an interferometer is more than 1.5 x 10^(11) cm^(-3) whichexceeds twice of the plasma cut-off density, suggesting that electron cyclotron heating bymode-converted electron Bernstein waves may take place.

关键词： spherical tokamak non-inductive start-up electron cyclotron heating

Current Ramp-up by Microwave Power in the LAtE Device

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Plasma Science and technology 2009年第4期11卷 394-396页

作者： takashi MAEKAWA Hitoshi tANAKA Masaki uchida Graduate School of Energy Science Kyoto University

In the low aspect ratio torus experiment （LAtE） device, plasma current is initiated and ramped up to 20 kA solely by microwave power at the electron cyclotron （EC） range of frequency with a ramp of the external vertical field By for the radial equilibrium of plasma torus at larger currents. Measurements suggest that an energetic electron tail in the energy range of about 200 keV carries the current. the line averaged electron density is higher than the plasma cutoff density, suggesting that tail electrons might be driven by electron Bernstein waves modeconverted from the launched electromagnetic waves.

关键词： current ramp-up microwave electron cyclotron range of frequency

the impact of alpha-fetoprotein (AFP), child-turcotte-pugh (CtP) score and disease staging on the survival of hepatocellular carcinoma (HCC) patients: a retrospective cohort from single oncology center

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Oncology research 2025年第1期33卷 149-160页

作者： Nasser Mulla Yousef Katib Asim M Almughamsi Duaa S Alkhayat Mohamed Mosaad Samir t Alfotih Rawan Alaofi Department of Internal Medicine Faculty of Medicine Taibah University Madinah 42278 Saudi Arabia. Department of Radiology Faculty of Medicine Taibah University Madinah 42278 Saudi Arabia. Department of Surgery Faculty of Medicine Taibah University Madinah 42278 Saudi Arabia. Department of Endemic and Infectious Diseases Suez Canal University Ismailia 41522 Egypt. King Salman bin Abdulaziz Medical City Madinah 42311 Saudi Arabia. Prince Mohammed Bin Abdulaziz Hospital Madinah 41511 Saudi Arabia.

Background:Hepatocellular carcinoma (HCC) is the most common cause of cancer-related death in Saudi Arabia. Our study aimed to investigate the patterns of HCC and the effect of tNM staging, Alfa-fetoprotein (AFP), and Child-turcotte Pugh (CtP) on patients' overall survival (OS).Methods:A retrospective analysis was conducted on 43 HCC patients at a single oncology center in Saudi Arabia from 2015 to 2020. All patients had to fulfill one of the following criteria: (a) a liver lesion reported as definitive HCC on dynamic imaging and/or (b) a biopsy-confirmed diagnosis.Results:the mean patient age of all HCC cases was 66.8 with a male-to-female ratio of 3.3:1. All patients were stratified into two groups: viral HCC (n = 22, 51%) and non-viral HCC (n = 21, 49%). Among viral-HCC patients, 55% were due to HBV and 45% due to HCV. Cirrhosis was diagnosed in 79% of cases. Age and sex did not significantly statistically differ in OS among viral and non-viral HCC patients (-value > 0.05). About 65% of patients had tumor size >5 cm during the diagnosis, with a significant statistical difference in OS (-value = 0.027). AFP was >400 ng/ml in 45% of the patients. there was a statistically significant difference in the OS in terms of AFP levels (-value = 0.021). A statistically significant difference was also observed between the CtP score and OS (-value = 0.02). CtP class B had the longest survival. BSC was the most common treatment provided to HCC patients followed by sorafenib therapy. there was a significant statistical difference in OS among viral and non-viral HCC patients (-value = 0.008).Conclusions:the most common predictors for OS were the underlying cause of HCC, AFP, and tumor size. Being having non-viral etiology, a tumor size >5 cm, an AFP > 400 ng/mL, and a CtP score class C were all negatively associated with OS.

关键词： Alpha-fetoprotein (AFP) Child-turcotte-pugh Hepatocellular carcinoma Pattern Progression free survival

Impacts of invasive Iris pseudacorus L.(yellow flag) establishing in an abandoned urban pond on native semi-wetland vegetation

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Journal of Integrative Agriculture 2018年第8期17卷 1881-1887页

作者： Daisuke Hayasaka Shingo Fujiwara taizo uchida Graduate School of Agriculture KINDAI University Faculty of Engineering Kyushu Sangyo University

Iris pseudacorus L., intentionally introduced in Japan as an ornamental plant and to improve aquatic environments, has been declared a noxious species in the Invasive Alien Species Act of Japan due to the suspected high ecological risks to the local species and ecosystems. Although prompt responses to I. pseudacorus have been sought to conserve local biodiversity, knowledge about its invasiveness is lacking. Here, we report the relationship between the establishment of I. pseudacorus and floristic changes in semi-wetland vegetation of an abandoned urban pond(Aoike), Nara City, Nara Prepecture, Japan. In total, 64 vascular plants were recorded in the pond, of which 50 were native species, seven were naturalized non-native, and seven were invasive species. On the other hand, most of these vascular plants(42 species) were grassland species and only several aquatic plants(10 species) were found in this study pond. the number of vascular plant species decreased significantly at quadrats with a coverage of I. pseudacorus above 50%. In addition, tendencies of lower number of native species and concomitant higher number of invasive species were found with increasing coverage of I. pseudacorus. From these results, we suggest that it is important to preferentially manage sites where the coverage of I. pseudacorus is above 50%, in order to preserve the local biodiversity. Additionally, as recommended in the literature, it is essential that the cut reproductive organs are kept submerged under deep water for an effective control of I. pseudacorus.

关键词： biodiversity conservation biological invasions ecological impacts exotic species hydrophytes species traits

Part-based methods for handwritten digit recognition

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Frontiers of Computer Science 2013年第4期7卷 514-525页

作者： Song WANG Seiichi uchida Marcus LIWICKI Yaokai FENG Department of Intelligent Systems Graduate School of Information Science and Electrical Engineering Kyushu University Fukuoka 819-0395 Japan German Research Center for Artificial Intelligence (DFKI) Kaiserslautern D-67663 Germany

In this paper, we intensively study the behavior of three part-based methods for handwritten digit recognition. the principle of the proposed methods is to represent a handwritten digit image as a set of parts and recognize the image by aggregating the recognition results of individual parts. Since part-based methods do not rely on the global structure of a character, they are expected to be more robust against various delormations which may damage the global structure. the proposed three methods are based on the same principle but different in their details, for example, the way of aggregating the individual results. thus, those methods have different performances. Experimental results show that even the simplest part-based method can achieve recognition rate as high as 98.42% while the improved one achieved 99.15%, which is comparable or even higher than some state-of-the-art method. this result is important because it reveals that characters can be recognized without their global structure. the results also show that the part-based method has robustness against deformations which usually appear in handwriting.

关键词： handwritten digit recognition local features,part-based method