检索结果-南通市图书馆

Challenges to Introduce Advanced Cooling Technology by the Utilization of Plural Cooling Velocity

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

材料热处理学报 2004年第5期25卷 434-436页

作者： kiyoshi Funatani MSTInst Nagoya JAPAN

The control of cooling power is very important to introduce desired properties. Usually, higher the cooling rate higher the quench hardness and distortion and the optimization of cooling power is the base for good heat treatment. The change of cooling speed during quenching is one of the effective methods to balance hardness and distortion. Different form the general knowledge of the demerit of vapor blanket stage, oil with long vapor blanket stage is also one of effective methods to reduce distortion. The reduction of distortion with enough quench hardness seems to be possible by optimization of cooling condition by the help of computer simulation. The exhibition of higher core hardness than surface in through hardening steels experienced in the "Inverse quench hardening" was introduced by Prof. Tamura and Shimizu. This mechanism is well explained by Arimoto et al, by analysis of computer simulation. In this paper, plural steps cooling methods are compared, in relation with cooling curve and heat transfer coefficient that is necessary to simulate quench results and the possibility of advanced cooling technology is discussed.

关键词：变形硬度冷却曲线传热系数蒸汽掩蔽计算机模似

Horizontal and vertical mutation fans

在线全文

学校读者我要写书评

暂无评论

Science China Mathematics 2019年第7期62卷 1267-1288页

作者： kiyoshi Igusa Department of Mathematics Brandeis University

We introduce diagrams for m-cluster categories which we call "horizontal" and "vertical" mutation fans. These are analogous to the mutation fans(also known as "semi-invariant pictures" or "scattering diagrams") for the standard(m = 1) cluster case, which are dual to the poset of finitely generated torsion classes. The purpose of these diagrams is to visualize mutations and analogues of maximal green sequences in the m-cluster category with special emphasis on the c-vectors(the "brick" labels).

关键词： exceptional sequence m-cluster category semi-invariant pictures t-structures c-vectors g-vectors silting objects simple minded collections

A Bubble Column Dehumidifier using Ionic Liquid Desiccant for Low-Humidity Industries: Insights into Transfer Processes Integrating Experiment and CFD Modelling

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2024年第6期33卷 2348-2371页

作者： CAO Bowen YIN Yonggao SAITO kiyoshi School of Energy and Environment Southeast UniversityNanjing 210096China School of Fundamental Science and Engineering Waseda UniversityTokyo 169-8555Japan Department of Applied Mechanics and Aerospace Engineering Waseda UniversityTokyo 169-8555Japan

Liquid desiccant deep dehumidification(LDDD)is an excellent energy-saving technology for low-humidity *** liquids(ILs)are favored as optimal working fluids for LDDD,owing to their low vapor pressure,non-crystallization,and *** combined application of IL desiccant with the bubble column has been proven to effectively improve deep *** present work focuses specifically on the insights into air-liquid transfer processes in bubble column dehumidifier using ionic liquid *** effect of operating parameters on volumetric transfer coefficient is examined based on the experimental ***,the bubble swarms meso-scale flow structure is predicted using computational fluid dynamics coupled with a population balance model(CFD-PBM).Besides,the structure-activity relationship between meso-scale flow structure and transfer performance is *** results indicated a notable phenomenon of bubble aggregation/breakage in the moist air-IL desiccant bubbly deep dehumidification(MA-ILD BDD)system,with a specific interfacial area is basically less than 40 m^(-1).Meanwhile,a decrease in solution temperature,correlated with a significant increase in viscosity,leads to larger turbulent eddies and a slower breakage ***,a high transfer potential difference enhances heat and mass transfer coefficients at lower solution temperatures,with the mass transfer coefficient at 4℃ being approximately three times that at 10℃.As the superficial velocity changes,the specific interfacial area and heat and mass transfer coefficients have a positive synergistic effect on volumetric transfer ***,this synergistic effect is reversed with variations in solution *** study aims to clarify the air-liquid transfer mechanism in bubble column dehumidifierusingILdesiccant.

关键词： liquid desiccant ionic liquid bubble column deep dehumidification heat and mass trans low-humidityindustries

Cyclic posets and triangulation clusters

在线全文

学校读者我要写书评

暂无评论

Science China Mathematics 2019年第7期62卷 1289-1316页

作者： kiyoshi Igusa Gordana Todorov Department of Mathematics Brandeis University Waltham MA 02454 USA Department of Mathematics Northeastern University Boston MA 02115 USA

Triangulated categories coming from cyclic posets were originally introduced by the authors in a previous paper as a generalization of the constructions of various triangulated categories with cluster *** give an overview, and then analyze "triangulation clusters" which are those corresponding to topological triangulations of the 2-disk. Locally finite nontriangulation clusters give topological triangulations of the "cactus space" associated to the "cactus cyclic poset".

关键词： cactus cyclic poset cluster structure triangulated categories Frobenius categories cocycle

2-D localization system utilizing M-sequence encoded laser beam scanning

在线全文

学校读者我要写书评

暂无评论

仪器仪表学报 2007年第3期28卷 408-413页

作者： Shinji Ohyama kiyoshi Tanaka Junya Takayama Graduate School of Science and Engineering Tokyo Institute of Technology 2-12-1 O-okayama Meguro-ku Tokyo 152-8552 Japan

In this paper, as the active position measurement system, a novel method for a two-dimensional localization system using M-sequence signal is proposed. The feature of this system is to realize a position measurement only by scanning the encoded laser beams from fixing points to a measurement field, and by observing it. First, both the system configuration and encoding method were practically considered, and an order and an initial value of M-sequence signal were selected for encoding. This method is based on discrete angle measurement therefore the resolution has its own limitation. To overcome this limitation, analogue phase shift detecting method was introduced. System design was performed and applied to position measurement experiments. The experimental results show that the measurement error of the analogue method is 1/3 of that of the discrete method.

关键词：激光电子束扫描位置测量二维定位系统 M序列离散法

Weld Shape Variation and Electrode Oxidation Behavior under Ar-(Ar-CO_2) Double Shielded GTA Welding

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2010年第2期26卷 170-176页

作者： Shanping Lu Hidetoshi Fujii kiyoshi Nogi Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of ScienceShenyang 110016 China Joining and welding Research Institute Osaka University Osaka 567-0047 Japan

Double shielded gas tungsten arc welding （GTAW, also known as tungsten inert gas （TIG） welding） of an SUS304 stainless steel with pure inert argon as the inner layer shielding and the At-CO2 or CO2 active gas as the out layer shielding was proposed in this study to investigate its effect on the tungsten electrode protection and the weld shape variation. The experimental results showed that the inner inert argon gas can successfully prevent the outer layer active gas from contacting and oxidizing the tungsten electrode during the welding process. Active gas, carbon dioxide, in the outer layer shielding is decomposed in the arc and dissolves in the liquid pool, which effectively adjusts the active element, oxygen, content in the weld metal. When the weld metal oxygen content is over 70×10-6, the surface-tension induced Marangoni convection changes from outward into inward, and the weld shape varies from a wide shallow one to a narrow deep one. The effect of the inner layer gas flow rate on the weld bead morphology and the weld shape was investigated systematically. The results show that when the flow rate of the inner argon shielding gas is too low, the weld bead is easily oxidized and the weld shape is wide and shallow. A heavy continuous oxide layer on the liquid pool is a barrier to the liquid pool movement.

关键词： Double shielding Weld shape Marangoni convection Gas tungsten arc welding

Development of Fiber-Optic Current Sensing Technique and Its Applications in Electric Power Systems

在线全文

学校读者我要写书评

暂无评论

Photonic Sensors 2014年第1期4卷 12-20页

作者： kiyoshi Kurosawa (1) 1. 4-15-16 Jindaiji-Motomachi Chofu-shi Tokyo 182-0017 Japan

This paperdescribes the development and applications of a fiber-optic electric current sensing technique with the stable properties and compact, simple, and flexible structure of the sensing device. The special characteristics of the sensors were achieved by use of the special low birefringence fiber as the Faraday-effect sensing element and were also achieved with creation of sensing schemes which matched with the features of the fiber. Making use of the excellent features of the sensing technique, various current monitoring devices and systems were developed and applied practically for the control and maintenance in the electric power facility. In this paper, the design and performance of the sensing devices are introduced first. After that, examples of the application systems practically applied are also introduced, including fault section/point location systems for power transmission cable lines.

关键词： Current sensor fiber Faraday-effect power application

Species-dependent effects of the phenolic herbicide ioxynil with potential thyroid hormone disrupting activity: modulation of its cellular uptake and activity by interaction with serum thyroid hormone-binding proteins

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2012年第5期24卷 949-955页

作者： Sakura Akiyoshi Gobun Sai kiyoshi Yamauchi Department of Biological Science Faculty of Science Shizuoka University

Ioxynil, a phenolic herbicide, is known to exert thyroid hormone （TH） disrupting activity by interfering with TH-binding to plasma proteins and a step of the cellular TH-signaling pathway in restricted animal species. However, comparative studies are still lacking on the TH disruption. We investigated the interaction of [125I] ioxynil with serum proteins from rainbow trout, bullfrog, chicken, pig, rat, and mouse, using native polyacrylamide gel electrophoresis. Candidate ioxynil-binding proteins, which included lipoproteins, albumin and transthyretin （TTR）, differed among the vertebrates tested. Rainbow trout and bullfrog tadpole serum had the lowest binding activity for ioxynil, whereas the eutherian serum had the highest binding activity. The cellular uptake of, and response to, ioxynil were suppressed by rat serum greater than by tadpole serum. The cellular uptake of [125I]ioxynil competed strongly with phenols with a single ring, but not with THs. Our results suggested that ioxynil interferes with TH homeostasis in plasma and with a step of cellular TH-signaling pathway other than TH-uptake system, in a species-specific manner.

关键词： endocrine disruption ioxynil thyroid hormone serum transthyretin uptake

The effect of drying of Piper hispidinervium bydifferent methods and its influence on the yield ofessential oil and safrole

在线全文

学校读者我要写书评

暂无评论

Information Processing in Agriculture 2023年第1期10卷 28-39页

作者： Helder kiyoshi Miyagawa Alberdan Silva Santos Systematic Investigation in Biotechnology and Molecular Biodiversity Laboratory Federal University of Para´Bele´m 66075-110PABrazil

The Piper hispidinervium leaves and thin stems were dried under laboratory and field *** drying was performed using a shade dryer operating with and without forced convection and an oven dryer operating at 30 and 40*** experiments were conducted using solar dryers with three different covers,i.e.,transparent,black plastic,and palm straw *** essential oil extraction was performed by steam distillation,and the safrole content was analyzed by gas *** mathematical models(Page,logarithmic,Henderson and Pabis,fractional,and diffusion)were fitted with the experimental data and compared based on the coefficient of determination(R2),root mean square error(RMSE)and *** suggest that the best model was the logarithmic model(R2>0.99,RMSE<0.0005,and v2<0.005).With sufficient drying,the safrole content increased up to 95%of the extracted oil;however,when the drying time was prolonged,both the oil yield and safrole content of the extracted oil decreased.

关键词： Modeling Drying kinetics Essential oil extraction Safrole extraction Piperaceae