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Soil Aggregation and Its Relationship with Organic Carbon of Purple Soils in the Sichuan Basin,China

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Agricultural Sciences in China 2008年第8期7卷 987-998页

作者： WEI Chao-fu SHAO Jing-an NI Jiu-pai GAO Ming XIE De-ti PAN Gen-xing Shuichi hasegawa College of Resources and Environment Southwest University Chongqing 400716 P.R.China College of Geography Science Chongqing Normal University Chongqing 400047 P.R.China Institute of Resource Ecosystem and Environment of Agriculture Nanjing Agricultural University Nanjing 210095 P.R.China Graduate School of Agriculture Hokkaido University Sapporo 060-8589 Japan

The interaction of soil aggregate dynamics with soil organic carbon is complex with varied spatio-temporal processes in macro-and micro-aggregates. This paper is to determine the aggregation of soil aggregates in purple soils （Regosols in FAO Taxonomy or Entisols in USDA Taxonomy） for four types of land use, cropland [corn （Zea mays L.）], orchard （citrus）, forestland （bamboo or cypress）, and barren land （wild grass）, and to explore their relationship with soil organic carbon in the Sichuan basin of southwestern China. Procedures and methods, including manual dry sieving procedure, Yoder＇s wet sieving procedure, pyrophosphates solution method, and Kachisky method, are used to acquire dry, wet, and chemically stable aggregates, and microaggregates. Light and heavy fractions of soil organic carbon were separated using 2.0 g·mL^-1 HgI2-KI mixed solution. The loosely, stably, and tightly combined organic carbon in heavy fraction were separated by extraction with 0.1 M NaOH and 0.1 M NaOH-0.1M Na4P2O7 mixed solution （pH 13）. The results show that the contents of dry and wet macroaggregates 〉0.25 mm in diameter were 974.1 and 900.0 g·kg^-1 highest in red brown purple soils under forestland, while 889.6 and 350.6 g·kg^-1 lowest in dark purple soil and lowest in grey brown purple soils under cropland, respectively. The chemical stability of macroaggregates was lowest in grey brown purple soil with 8.47% under cropland, and highest in red brown purple soil with 69.34% under barren land. The content of microaggregates in dark purple soils was 587g·kg^-1 higher than brown purple soils, while 655g·kg^-1 in red brown purple soils was similar to grey brown purple soils （651g·kg^-1）. Cropland conditions, only 38.4% of organic carbon was of the combined form, and 61.6% of that existed in light fraction. Forestland conditions, 90.7% of organic carbon in red brown purple soil was complexed with minerals as a form of humic substances. The contents and stability of wet aggregates 〉 0.25

关键词： aggregation of soil primary particle soil structure soil organic carbon aggregate size distribution complexingof organo-mineral purple soil

利用尾波包络线反演方法研究伽师强震群区地壳的非均匀结构

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地球物理学报 2009年第1期52卷 90-98页

作者：王勤彩陈章立 Y．Asano 郑斯华 A．hasegawa 中国地震局地震预测研究所北京100036 日本防灾科学技术研究所筑波3050006 日本东北大学地震与火山喷发预知研究观测中心仙台9808578

以单次散射模型、球形辐射源、一维线性速度模型为基础计算理论包络线,通过尾波归一化方法把理论与观测包络线结合起来形成非线性方程组,用迭代最小二乘方法反演伽师强震群区的散射系数空间分布.结果表明,伽师强震群区下方中上地壳中存... 详细信息

以单次散射模型、球形辐射源、一维线性速度模型为基础计算理论包络线,通过尾波归一化方法把理论与观测包络线结合起来形成非线性方程组,用迭代最小二乘方法反演伽师强震群区的散射系数空间分布.结果表明,伽师强震群区下方中上地壳中存在明显的非均匀结构.在10～25km各深度图像上,研究区中部都存在一低散射系数区,这个低散射系数区在10km、15km深度被高散射系数区包围,在20km深度仅其东侧存在高散射系数区.1997年的7次Ms≥6.0级地震发生在研究区中部的低散射系数区内或低散射系数区向高散射系数区过渡带的低散射系数一侧.

关键词：伽师强震群区散射系数尾波包络线地壳的非均匀结构

Position Sensorless Torque Estimation of Synchronous Reluctance Motors Based on Extended-Flux Model without Core-Loss Measurement

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Journal of Energy and Power Engineering 2012年第9期6卷 1480-1487页

作者： Masaru hasegawa Hiroki Kitahara Atsushi Matsumoto Department of Electrical Engineering Chubu University Aichi 487-8501 Japan Department of Electrical Engineering and Computer Science Nagoya University Nagoya 468-8603 Japan

This paper proposes an extended-flux model with core-loss resistance of SynRMs （synchronous reluctance motors） and precise torque estimation without core-loss measurement and position encoder. The proposed torque estimation is useful for precise MTPA （maximum torque per ampere） control of position sensorless controlled SynRMs, which is achieved with the assistance of active and reactive powers.

关键词： Synchronous reluctance motors maximum torque per ampere control torque estimation magnetic saturation positionsensorless.

Usefulness of Enteral Nutritional Intake Containing Median-Chain Fatty Acids in Parkinson’s Disease Patients with Weight Loss: A Pilot Study

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Advances in Parkinson's Disease 2019年第1期8卷 1-7页

作者： Makoto Shiraishi Kenji Isahaya Yasuhiro hasegawa Department of Internal Medicine Division of Neurology St. Marianna University School of Medicine Kawasaki City Japan

Background: No solution has yet been found for the nutritional issues of Parkinson’s disease (PD) patients with weight loss, which affects their prognosis. The objective of the present study was to investigate whether a defined-formula diet rich in ω3 fatty acids improved nutrition through the effect of ghrelin in PD patients with weight loss. Method: Weight, serum total protein, albumin, lipids, serum ghrelin, serum acylghrelin, leptin, and the Unified Parkinson’s Disease Rating Scale were monitored for approximately 3 months in 11 subjects given a defined-formula diet rich in ω3 fatty acids for 3 months and 5 control subjects who received no such treatment. Results: No significant changes from baseline in serum ghrelin, acylghrelin, and leptin levels were noted after administration of the nutritional product. Meanwhile, compared with the control, changes from baseline in the levels of albumin and weight were significant after the nutritional therapy rich in ω3 fatty acids (P < 0.05). Conclusion: Administration of a medium-chain fatty acid-rich product has few effects on motor functions and activities of daily living in PD patients with weight loss, but it is expected to offer effective ghrelin-mediated nutritional improvement.

关键词： Parkinson’s Disease Weight Loss Ghrelin Leptin

Key Role of Hybridization between Actinide 5fand Oxygen 2pOrbitals for Electronic Structure of Actinide Dioxides

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Journal of Modern Physics 2013年第12期4卷 1574-1582页

作者： Yu hasegawa Takahiro Maehira Takashi Hotta 1Department of Physics Tokyo Metropolitan University Tokyo Japan 2Advanced Science Research Center Japan Atomic Energy Agency Ibaraki Japan Department of Physics Tokyo Metropolitan University Tokyo Japan Faculty of Science University of the Ryukyus Okinawa Japan

In order to promote our understanding on electronic structure of actinide dioxides, we construct a tight-binding model composed of actinide 5f and oxygen 2p electrons, which is called f-p model. After the diagonalization of the f-p model, we compare the eigen-energies in the first Brillouin zone with the results of relativistic band-structure calculations. Here we emphasize a key role of f-p hybridization in order to understand the electronic structure of actinide dioxides. In particular, it is found that the position of energy levels of Г7 and Г8 states determined from crystalline electric field (CEF) potentials depends on the f-p hybridization. We investiagte the values of the Slater-Koster integrals for f-p hybridization, (fpσ) and (fpπ), which reproduce simultaneously the local CEF states and the band-structure calculation results. Then, we find that the absolute value of (fpπ) should be small in comparison with (fpσ) = 1 eV. The small value of |(fpπ)| is consistent with the condition to obtain the octupole ordering in the previous analysis of the f-p model.

关键词： Tight-Binding Approximation Actinide Dioxides f-p Hybridization Crystalline Electric Field Potential

State Estimation for Sound Environment System with Nonlinear Observation Characteristics by Introducing Wide-Sense Particle Filter

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Intelligent Information Management 2019年第6期11卷 87-101页

作者： Hisako Orimoto Akira Ikuta Kouji hasegawa Department of Management Information Systems Prefectural University of Hiroshima Hiroshima Japan Western Region Industrial Research Center Hiroshima Prefectural Technology Research Institute Kure Japan

In this study, a modified particle filter considering non-Gaussian properties of noises is proposed in a form applicable to real situation in sound environment system where the observation data are contaminated by the external noise (i.e., background noise) of arbitrary probability distribution and measured in decibel scale. More specifically, a nonlinear observation model in decibel scale with a quantized level is first paid considered by introducing the additive property of energy variables (i.e., sound intensity) in sound environment system. Next, a wide-sense particle filter of an expansion expression type is derived in a form suitable for the nonlinear observation characteristics and the signal processing considering higher-order correlation information between the specific signal and observation. Furthermore, the effectiveness of the proposed theory is confirmed by applying it to the observed data measured in real sound environment.

关键词： Sound Environment Nonlinear Observation Non-Gaussian Distribution Particle Filter

Use of Electrochemical Processes for Formation of Semiconductor Nanostructures

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Use of Electrochemical Processes for Formation of Semiconduc...

Characterization of NADase-Inactive NAD+Glycohydrolase in Streptococcus pyogenes

2～(nd) Spring Meeting of the International Society of Electrochemistry

作者： H.hasegawa Research Center for Integrated Quantum Electronics Hokkaido University Sapporo 060-8628 Japan

It is widely recognized that artificial semiconductor nanostructures such as quantum wires(QWRs) and quantum dots(QDs) give rise to new rich functionalities to materials, producingnew quantum state spectra with novel state transitions and linear and non-linear quantumtransport phenomena, and opening up opportunity for novel quantum devices which controlquantum-mechanical behavior of electrons and photons in various sophisticated ways. The

关键词： Use of Electrochemical Processes for Formation of Semiconductor Nanostructures QDs

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Advances in Microbiology 2013年第1期3卷 91-100页

作者： Ichiro Tatsuno Masanori Isaka Tadao hasegawa Department of Bacteriology Graduate School of Medical Sciences Nagoya City UniversityNagoya Japan

Background: Streptococcus pyogenes secretes NAD+ glycohydrolase (NADase, also known as SPN or Nga). All S. pyogenes strains examined to date possess the gene that encodes SPN (spn), but some strains produce SPN that lacks detectable NADase activity. Although there is much evidence to support that SPN’s NADase activity contributes to virulence, there is very little evidence that NADase-inactive SPN has detectable functions. Results: In order to characterize the NADase-inactive SPN, we firstly attempted to clone the NADase-inactive spn allele in Escherichia coli. Although we obtained recombinants which were shown to have the correct size insert, all had some mutations in the spn allele. Therefore, we attempted to change the mutated nucleotides back to the original nucleotides. While a nucleotide mutagenesis (inverse PCR method) easily changed a target nucleotide of control genes back to the original nucleotides, the mutations of NADase-inactive spn allele were never successfully converted back to the original nucleotides. Finally the mutant spn alleles were sub-cloned into another vector (pLZ12-Km2), which is maintained in both E. coli and S. pyogenes. The resultant plasmids were subjected to nucleotide mutagenesis using inverse PCR;the resultant mutagenized plasmid DNAs were used to transform both E. coli and S. pyogenes strains. We observed successful nucleotide substitutions back to the original spn nucleotide sequence in S. pyogenes transformants, but not in E. coli transformants. Thus, the NADase-inactive spn allele was successfully cloned in S. pyogenes, but not in E. coli. However, we could not find an association with NADase-inactive spn allele and virulence in a mouse infection model. Conclusions: These results suggest that NADase-inactive spn allele has some toxic effect to E. coli, but not S. pyogenes. This effect may due to an as of yet unknown function attributable to NADase-inactive SPN.

关键词： Streptococcus pyogenes NAD+ Glycohydrolase NADase SPN Streptococcal SF370

Transient Stability Assessment of Synchronous Generator in Power System with High-Penetration Photovoltaics

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Journal of Mechanics Engineering and Automation 2012年第12期2卷 762-768页

作者： Masaki Yagami Takahiko hasegawa Junji Tamura Department of Electrical and Digital Systems Engineering Hokkaido Institute of Technology Sapporo 006-8585 Japan Department of Electrical and Electronic Engineering Kitami Institute of Technology Kitami 090-8507 Japan

As photovoltaic （PV） capacity in power system increases, the capacity of synchronous generator needs to be reduced relatively. This leads to the lower system inertia and the higher generator reactance, and hence the generator transient stability may negatively be affected. In particular, the impact on the transient stability may become more serious when the considerable amounts of PV systems are disconnected simultaneously during voltage sag. In this work, the generator transient stability in the power system with significant PV penetration is assessed by a numerical simulation. In order to assess the impact from various angles, simulation parameters such as levels of PV penetration, variety of power sources （inverter or rotational machine）, and existence of LVRT capability are considered. The simulation is performed by using PSCAD/EMTDC software.

关键词： High-penetration photovoltaics low-voltage ride-through (LVRT) synchronous generator transient stability.