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Chinese Journal of Polymer Science 2011年第5期29卷 634-638页

作者：石山 Shin-ichi Kuroda Key Laboratory of Applied Technology of Polymer Materials College of Materials Science and EngineeringShenyang University of Chemical Technology Department of Production Science and Technology Faculty of EngineeringGunma UniversityOta 373-0057Japan

Micron-sized nonspherical polymer particles having different morphologies were synthesized by seeded soap-free emulsion polymerization of styrene （St） and ethyleneglycol dimethacrylate （EGDMA, used as a crosslinker） on spherical, linear polystyrene （PS） seed particles. The morphology of the resulting PS/poly（St-co-EGDMA） particles was dependent on the crosslinker concentration and polymerization temperature.

关键词： Nonspherical Polymer particles Seeded soap-free emulsion polymerization Crosslinking.

Improved rate-distortion optimized video coding using non-integer bit estimation and multiple Lambda search

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Frontiers of Computer Science 2016年第1期10卷 157-166页

作者： Sio kei IM Mohammad Mahdi GHANDI MPI-QMUL Information Systems Research Centre Macao Polytechnic Institute Macao China Department of Electronic Systems Engineering University of Essex Colchestey CO4 3SQ UK

Many modern video encoders use the Lagrangian rate-distortion optimization （RDO） algorithm for mode deci- sions during the compression procedure. For each encoding stage, this approach involves minimizing a cost, which is a function of rate, distortion and a multiplier called Lambda. This paper proposes to improve the RDO process by applying two modifications. The first modification is to increase the ac- curacy of rate estimation, which is achieved by computing a non-integer number of bits for arithmetic coding of the syntax elements. This leads to a more accurate cost computation and therefore a better mode decision. The second modification is to search and adjust the value of Lambda based on the char- acteristics of each coding stage. For the encoder used, this paper proposes to search multiple values of Lambda for the intra-4x4 mode decision. Moreover, a simple shift in Lambda value is proposed for motion estimation. Each of these modi- fications offers a certain gain in RDO performance, and, when all are combined, an average bit-rate saving of up to 7.0% can be achieved for the H.264/AVC codec while the same concept is applicable to the H.265/HEVC codec as well. The extra added complexity is contained to a certain level, and is also adjustable according to the processing resources available.

关键词： rate distortion optimization Lambda adjust-ment non-integer bit estimation H.264/AVC H265/HEVCvideo coding

Mass balance of saline lakes considering inflow loads of rivers and groundwater: the case of Lake Issyk-Kul, Central Asia

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Journal of Arid Land 2021年第12期13卷 1260-1273页

作者： kei SAITOH Rysbek SATYLKANOV Kenji OKUBO Beppu Geothermal Research Laboratory Institute for Geothermal SciencesGraduate School of ScienceKyoto UniversityOita 8740903Japan Tien Shan High Mountain Research Center Institute of Water Problem and Hydropower of National Academy of Sciences of Kyrgyz RepublicBishkek 720033Kyrgyzstan Graduate School of Environmental and Life Science Okayama UniversityOkayama 7008530Japan

This study aimed to elucidate the influence of inflow water on the salinity concentration process of a saline lake and the mass balance of Lake Issyk-Kul,a tectonic saltwater lake in *** on the survey results and meteorological data from 2012 to 2015,we analyzed the dissolved chemical composition loads due to water ***,we discussed the relationship between the increase in salinity and water inflow into the *** the water quality analysis data,we used the tank model to estimate the river inflow and analyze the loads by the L-Q *** groundwater loads were then estimated from the average annual increase in salinity of the lake over a period of 30 *** results suggest that Lake Issyk-Kul was temporarily freshened between about AD 1500 and 1800 when an outflowing river existed,and thereafter,it became a closed lake in AD 1800 and continued to remain a saline lake until *** chemical components that cause salinization are supplied from the rivers and groundwater in the catchment area,and when they flow into the lake,Ca^(2+),HCO_(3)−and Mg^(2+)precipitate as CaCO_(3) and MgCO_(3).These compounds were confirmed to have been left on the lakeshore as *** model analysis showed that 1.67 mg/L of Ca^(2+)and Mg^(2+)supplied from rivers and groundwater are precipitated as evaporite and in other forms per *** the other hand,salinity continues to remain in the lake water at a rate of 27.5 mg/L per *** are the main causes of increased salinity in Lake *** Na^(+)and Cl^(-)are considered to be derived from geothermal water,they will continue to flow in regardless of the effects of human ***,as long as these components are accumulated in Lake Issyk-Kul as a closed lake,the salinity will continue to increase in the future.

关键词： groundwater geothermal water mass balance salinity saline lake L-Q curve

The Gauss maps of Demoulin surfaces with conformal coordinates

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Science China Mathematics 2021年第7期64卷 1479-1492页

作者： Jun-ichi Inoguchi Shimpei Kobayashi Institute of Mathematics University of TsukubaTsukuba 305-8571Japan Department of Mathematics Hokkaido UniversitySapporo 060-0810Japan

Demoulin surfaces in the real projective 3-space are investigated. Our result enables us to establish a generalized Weierstrass type representation for definite Demoulin surfaces by virtue of primitive maps into a cer... 详细信息

关键词： Demoulin surface Wilczynski frame Gauss map

Microwave Behavior of α-Fe/Fe_3B/Y_2O_3 Nanocomposites in GHz Range Prepared by Melt-Spun Technique

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Journal of Rare Earths 2004年第1期22卷 13-16页

作者： Masahiro Itoh Ken-ichi Machida Collaborative Research Center for Advanced Science and Technology Collaborative Research Center for Advanced Science and Technology Osaka University 2-1 Yamadaoka Suita Osaka 565-0871 JapanOsaka University 2-1 Yamadaoka Suita Osaka 565-0871 Japan

Nanocomposites α-Fe/Fe 3B/Y 2O 3 were prepared by a melt-spun technique, and the electromagnetic wave absorption properties were measured in the 0 05～20 05 GHz range. Compared with α-Fe/Y 2O 3 composites, the resonance frequency (f r) of α-Fe/Fe 3B/Y 2O 3 shifted to a higher frequency range due to the large anisotropy field (H A) of tetragonal Fe 3B (～0 4 mA·m -1). The relative permittivity (ε r=ε r′-jε r″) was constantly low over the 0 5～10 GHz region, which indicates that the composite powders have a high resistivity (ρ=～100 Ωm). The effective electromagnetic wave absorption (RL<-20 dB) was obtained in a frequency range of 2.7～6.5 GHz on resin composites of 80% (mass fraction) α-Fe/Fe 3B/Y 2O 3 powders, with thickness of 6～3 mm respectively. A minimum reflection loss of -33 dB was observed at 4.5 GHz with an absorber thickness of 4 mm.

关键词： melt-spun nanocomposites electromagnetic wave absorption anisotropy field matching frequency

Spatiotemporal changes in antlerless proportion of culled Sika deer in relation to deer density

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Journal of Forestry Research 2022年第3期33卷 1095-1101页

作者： kei K.Suzuki Teruki Oka Masatoshi Yasuda Kyushu Research Center Forestry and Forest Products Research InstituteKumamoto860-0862Japan Shikoku Research Center Forestry and Forest Products Research InstituteKochi780-8077Japan

Population management of herbivores is widely applied to decrease damage to forests in the northern hemisphere. Culling more antlerless deer, including females and fawns, is an effective means of reducing the population and helps to improve management efficiency. To increase the efficiency of antlerless-biased culling, we assessed the spatiotemporal distribution of the antlerless ratio in culled sika deer (Cervus nippon) in relation to population density. We hypothesized that the antlerless ratio is higher at the center of the distribution than at the margins of the deer’s range, because dispersal processes differ according to sex and age: Young male deer first disperse into an unoccupied area, and then males may become established in the new area for approximately 10–15 years before the number of females increases. A statistical model revealed spatiotemporal changes in the antlerless ratio of culled sika deer. The change in the ratio basically fit the density distribution of the deer, which was estimated independently on the basis of fecal pellet count surveys. The antlerless ratio estimated from the model increased asymptotically as deer density rose. The results support our hypothesis and suggest that antlerless sika deer will be more easily culled at the center rather than at the margins of the distribution range. These findings should help to increase the efficiency of managing the deer via antlerless-biased culling.

关键词： Antlerless Culling Density Distribution Large herbivore Wildlife management

WWW Business Applications Based on the Cellular Model

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Journal of Computer Science & Technology 2008年第2期23卷 176-187页

作者： Toshio Kodama Tosivasu L.Kunii Yoichi seki Venture Business Department Maeda Corporation2-10-26 FujimiChiyoda-kuTokyo 102-0071Japan Morpho Inc.The University of TokyoEntrepreneur Plaza 5F 7-3-1 HongoBunkyo-ku Tokyo 113-0033Japan Software Consultant 3-8-2 SakaemachiHino CityTokyo 191-0001Japan

A cellular model based on the Incrementally Modular Abstraction Hierarchy （IMAH） is a novel model that can represent the architecture of and changes in cyberworlds, preserving invariants from a general level to a specific one. We have developed a data processing system called the Cellular Data System （CDS）. In the development of business applications, you can prevent combinatorial explosion in the process of business design and testing by using CDS. In this paper, we have first designed and implemented wide-use algebra on the presentation level. Next, we have developed and verified the effectiveness of two general business applications using CDS： 1） a customer information management system, and 2） an estimate system.

关键词： cyberworlds incrementally modular abstraction hierarchy formula expression topological space adjunction space cellular space presentation level

Hypothesis Testing for Independence Under Blocked Compound Symmetric Covariance Structure

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Communications in Mathematics and Statistics 2018年第2期6卷 163-184页

作者： Shin-ichi Tsukada School of Education Meisei University2-1-1 Hodokubo HinoTokyo 191-8506Japan

One type of covariance structure is known as blocked compound ***,Roy et al.(J Multivar Anal 144:81–90,2016)showed that,assuming this covariance structure,unbiased estimators are optimal under normality and described hypothesis testing for independence as an open *** this paper,we derive the distributions of unbiased estimators and consider hypothesis testing for *** test statistics such as the likelihood ratio criterion,Waldstatistic,Rao’s score statistic,and gradient statistic are derived,and we evaluate the accuracy of the test using these statistics through numerical *** power of the Wald test is the largest when the dimension is high,and the power of the likelihood ratio test is the largest when the dimension is low.

关键词： Hypothesis testing Asymptotic distribution Independence Blocked compound symmetric covariance structure

Single-site surface-enhanced Raman scattering beyond spectroscopy

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Frontiers of physics 2016年第2期11卷 19-30页

作者： Mai Takas Satoshi Yasuda kei Murakoshi Department of Chemistry Faculty of Science Hokkaido University Sapporo Hokkaido 060-0810 Japan Graduate School of Engineering Muroran Institute of Technology Muroran 050-8585 Japan

Recent progress in the observation of surface-enhanced Raman scattering （SERS） is reviewed to examine the possibility of finding a novel route for the effective photoexcitation of materials. The importance of well-controlled SERS experiments on a single molecule at a single site is discussed based on the difference in the information obtained from ensemble SERS measurements using mul- tiple active sites with an uncontrolled number of molecules. A single-molecule SERS observation performed at a mechanically controllable breaking junction with a simultaneous conductivity mea- surement provides clear evidence of the drastic changes both in the intensity and in the Raman mode selectivity of the electromagnetic field generated by localized surface plasmon resonance. Careful con- trol of the field at a few-nanometer-wide gap of a metal nanodimer results in the modification of the selection rule of electronic excitation of an isolated single-walled carbon nanotube. The examples shown in this review suggest that a single-site SERS observation could be used as a novel tool to find, develop, and implement applications of plasmon-induced photoexcitation of materials.

关键词： surface-enhanced Raman scattering localized surface plasmon resonance metalnanostructure single-molecule observation single-walled carbon nanotube selection rule ofelectronic excitation

SPECIES-AREA RELATIONSHIP FOR POWER-LAW SPECIES ABUNDANCE DISTRIBUTION

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International Journal of Biomathematics 2012年第3期5卷 215-223页

作者： HARUYUKI IRIE kei TOKITA Information Media Center and Graduate School of Science Hiroshima University 1-4-2 Kagamiyama Higashi-Hiroshima Hiroshima 739-8511 Japan Cybermcdia Center Graduate School of Science and Graduate School of Frontier Biosciences Osaka University 1-32 Machikaneyamacho Toyonaka Osaka 560-0043 Japan

We studied the mathematical relations between species abundance distributions （SADs） and species-area relationships （SARs） and found that a power-law SAR can be generally derived from a power-law SAD without a special assumption such as the ＂canonical hypothesis＂. In the present analysis, an SAR-exponent is obtained as a function of an SAD-exponent for a finite number of species. We also studied the inverse problem, from SARs to SADs, and found that a power-SAD can be derived from a power-SAR under the condition that the functional form of the corresponding SAD is invariant for changes in the number of species. We also discuss general relationships among lognormal SADs, the broken-stick model （exponential SADs）, linear SARs and logarithmic SARs. These results suggest the existence of a common mechanism for SADs and SARs, which could prove a useful tool for theoretical and experimental studies on biodiversity and species coexistence.

关键词： Species-area relationship species abundance distribution power-law SAD.