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新杀虫剂——NNI-750

农药译丛 1984年第6期 54-56页

作者： H.Kanno K.Ikeda t.asai S.Maekawa 阮朗日本农药公司化学研究中心日本农药公司生物研究中心

日本农药公司在对一组噻二嗪类化合物进行研究过程中,从众多的衍生物筛选中发现2-特丁基亚氨基-3-异丙基-5-苯基全氢-1,3,5-噻二嗪-4-酮具有最高的活性。同常规杀虫剂比较,其化学结构和作用方式颇为独特。本文仅对此作一简要介绍。理化... 详细信息

日本农药公司在对一组噻二嗪类化合物进行研究过程中,从众多的衍生物筛选中发现2-特丁基亚氨基-3-异丙基-5-苯基全氢-1,3,5-噻二嗪-4-酮具有最高的活性。同常规杀虫剂比较,其化学结构和作用方式颇为独特。本文仅对此作一简要介绍。理化性质化学名:2-特丁基亚氨基-3-异丙基-5-苯基全氢-1,3,5-噻二嗪-4-酮。代号:NNI-750、NNK-758、NN-29285。商品名为Applaud。

关键词：若虫温室粉虱喷药同型幼虫稻褐飞虱褐飞虱 NNI-750

EFFECt OF INtERMIttENt HIGH FREQUENCY MAGNEtIC FIELD ON INItIAL SOLIDIFICAtION IN CONtINUOUS CAStING

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Acta Metallurgica Sinica(English Letters) 1997年第2期10卷 151-156页

作者： Li, t.J. Sassa, K. asai, S. Dalian Univ of technology Dalian China

Contacting state between molten metal and a mold and initial solidification process of continuously cast metals can be controlled by imposing an intermittent magnetic *** this study, effect of the intermittent magnetic field on the initial solidification ofcontinuoasly cast metals was investigated by measuring the temperature distribution in the melt pool and the initial solidification starting position of shells. It was found that under the condition with intermittent magnetic field, the melt near meniscns is in slow cooling state, the initial solidification starting position descends, initial solidification shell thickens and the liquid-solid interface becomes smooth.

关键词： continuous casting initial solidification of metal surface quality of cast metal electromagnetic field

Luminescence properties of Gd2Si2O7：Ce and Gd2Si2O7：La,Ce under vacuum ultraviolet irradiation

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Journal of Rare Earths 2016年第8期34卷 782-785页

作者： M.Koshimizu t.Yanagida Y.Fujimoto K.asai Department of Applied Chemistry Graduate School of Engineering Tohoku University 6-6-07 Aoba Aramaof Aoba-ku Sendai 980-8579 Japan Graduate School of Materials Science Nara Institute of Science and Technology 8916-5 Takayama-Cho Ikoma Nara 630-0192 Japan

the luminescence properties of Ce- or Ce and La-doped gadolinium pyrosilicate （Gd2Si2Ot, GPS） were characterized using vacuum ultraviolet （VUV） excitation light. A prominent emission band was observed in the luminescence spectra with excitation at 60 nm and ascribed to 5d-4f transition of Ce3＋. Because the excitation wavelength of 60 nm corresponded to the excitation in the host matrix, this result indicated that the excitation energy transfer occurred from the host matrix to Ce3＋ ions. On the basis of the rise in the luminescence time profiles with excitation at 60 nm, the energy transfer occurred within 2 ns, which was much shorter than that of Ce-doped Gd2SiO2. For Ce-doped GPS, the decay rate was slower for the host excitation than that for direct excitation of Ce3＋. In contrast, for Ce and La-doped GPS, no significant difference was observed for the host excitation and direct excitation of Ce3＋. this result indicated that the energy transfer from the host to Ce3＋ ions led to a different radiative decay process, and that La doping had an effect on the energy transfer and decay process.

关键词： energy transfer scintillation vacuum ultraviolet rare earths

Water entry of decelerating spheres simulations using improved ISPH method

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Journal of Hydrodynamics 2018年第6期30卷 1120-1133页

作者： Abdelraheem M.Aly Mitsuteru asai Department of Mathematics Faculty of Science King Khalid University Department of Mathematics Faculty of Science South Valley University Department of Civil Engineering Kyushu University

In this paper, we simulated the vertical impact of spheres on a water surface using three-dimensional incompressible smoothed particle hydrodynamics(3-D ISPH) method. the sphere motion is taken to be a rigid body motion and it is modeled by ISPH method. the governing equations are discretized and solved numerically using ISPH method. A stabilized incompressible SPH method by relaxing the density invariance condition is adopted. Here, we computed the motions of a rigid body by direct integration of the fluid pressure at the position of each particle on the body surface. the equations of translational and rotational motion were integrated in time domain to update the position of the rigid body at each time step. In this study, we improved the boundary treatment between fluid and fixed solid boundary by using virtual marker technique. In addition, an improved algorithm based on the virtual marker technique for the boundary particles is proposed to treat the moving boundary of the rigid body motion. the force exerted on the moving rigid boundary particles by the surrounding particles, is calculated by the SPH approximation at the virtual marker points. the applicability and efficiency of the current ISPH method are tested by comparison with reference experimental results.

关键词： Incompressible smoothed particle hydrodynamics(ISPH) free surface flow sphere rigid body water entry

Impact of Pollutant Concentration and Particle Deposition on the Radiative Flow of Casson-Micropolar Fluid between Parallel Plates

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Computer Modeling in Engineering & Sciences 2025年第1期142卷 665-690页

作者： Ghaliah Alhamzi Badr Saad t.Alkahtani Ravi Shanker Dubey Vinutha Kalleshachar Neelima Nizampatnam Department of Mathematics and Statistics College of ScienceImam Mohammad Ibn Saud Islamic University(IMSIU)Riyadh11564Saudi Arabia Department of Mathematics College of ScienceKing Saud UniversityRiyadh11989Saudi Arabia Department of Mathematics Amity School of Applied SciencesAmity University RajasthanJaipur302002RajasthanIndia Department of Studies in Mathematics Davangere UniversityDavangere577002India Department of Electronics and Communication Engineering Amrita School of EngineeringAmrita Vishwa VidyapeethamBengaluru560035India

Assessing the behaviour and concentration of waste pollutants deposited between two parallel plates is essential for effective environmental *** the effectiveness of treatment methods in reducing pollution scales is made easier by analysing waste discharge *** waste discharge concentration analysis is useful for assessing how effectively wastewater treatment techniques reduce pollution *** study aims to explore the Casson micropolar fluid flow through two parallel plates with the influence of pollutant concentration and thermophoretic particle *** explore the mass and heat transport features,thermophoretic particle deposition and thermal radiation are *** governing equations are transformed into ordinary differential equations with the help of suitable similarity *** Runge-Kutta-Fehlberg’s fourthfifth order technique and shooting procedure are used to solve the reduced set of equations and boundary *** integration of a neural network model based on the Levenberg-Marquardt algorithm serves to improve the accuracy of predictions and optimize the analysis of *** outcomes are displayed to analyze the characteristics of the relevant dimensionless parameters in the current *** reveal that concentration upsurges as the micropolar parameter *** concentration reduces with an upsurge in the thermophoretic *** upsurge in the external pollutant source variation and the local pollutant external source parameters enhances mass *** surface drag force declines for improved values of porosity and micropolar parameters.

关键词： Micropolar fluid thermal radiation porous medium thermophoretic particle deposition waste discharge concentration

Numerical study on tidal currents and seawater exchange in the Benoa Bay, Bali, Indonesia

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Acta Oceanologica Sinica 2014年第3期33卷 90-100页

作者： HENDRAWAN I Gede asai Koji Department of Marine Sciences Faculty of Marine Sciences and Fisheries Udayana University Department of Civil and Environmental Engineering Yamaguchi University

A three-dimensional （3-D） finite volume coastal ocean model （FVCOM） was used for the study of water cir culation and seawater exchange in the Benoa Bay, Bali Island. the M2 tidal component was forced in open boundary and discharge from six rivers was included in the numerical calculation. the M2 tidal elevation produced by the FVCOM has a good agreement with the observation data. the M2 tidal current is also suc cessfully calculated under the ebb tide and flood tide conditions. the non-linear M2 tidal residual current was produced by the coastline geometry, especially surrounding the narrow strait between the Serangan Is- land and the Benoa Peninsula. the tidal residual current also generated two small eddies within the bay and one small eddy in the bay mouth. the salinity distribution influenced by river discharge could be success- fully calculated, where the numerical calculation and the observation results have a good correlation （r2） of 0.75. Finally in order to examine the seawater exchange in the Benoa Bay, the Lagrangian particle tracking method and calculation of residence time are applied. the mechanism of particle transport to the flushing of seawater is depicted clearly by both methods.

关键词： FVCOM M2 tidal current M2 residual current salinity seawater exchange

Assessing the efficacy of health countermeasures on arrival time of infectious diseases

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Infectious Disease Modelling 2023年第2期8卷 603-616页

作者： Yusuke asai Disease Control and Prevention Center National Center for Global Health and Medicine1-21-1 ToyamaShinjuku-kuTokyo162-8655Japan

Public health measures to control the international spread of infectious diseases include strengthening quarantines and sealing *** these measures are effective in delaying the importation of infectious diseases,they also have a significant economic impact by stopping the flow of people and *** arrival time of infectious diseases is often used to assess quarantine *** the arrival time is highly dependent on the number of infected cases in the endemic country,direct comparisons have not yet been ***,this study derives an explicit relationship between the number of infected cases and arrival *** behavior is stochastic,and deterministic models are not always *** this study,random differential equations,which are differential equations with stochastic processes,were used to describe the dynamics of infection in an endemic ***,the flow of travelers from the endemic country was described in terms of survival time,and the arrival time in each country was calculated.A scenario in which PCR kits were distributed between endemic and diseasefree countries was also considered,and the impact of different distribution rates on arrival time was *** simulation results showed that increasing the distribution of PCR kits in the endemic country was more effective in delaying arrival times than using PCR kits in quarantine in disease-free *** was also found that increasing the proportion of identified infected persons in the endemic country,leading to isolation,was more important and effective in delaying arrival times than increasing the number of PCR tests.

关键词： Epidemic model Arrival time Health countermeasures Quarantine Random ODE

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： Peclet number

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 MedicineTaibah UniversityMadinah42278Saudi Arabia Department of Radiology Faculty of MedicineTaibah UniversityMadinah42278Saudi Arabia Department of Surgery Faculty of MedicineTaibah UniversityMadinah42278Saudi Arabia Department of Endemic and Infectious Diseases Suez Canal UniversityIsmailia41522Egypt King Salman bin Abdulaziz Medical City Madinah42311Saudi Arabia Prince Mohammed Bin Abdulaziz Hospital Madinah41511Saudi Arabia

Background:Hepatocellular carcinoma(HCC)is the most common cause of cancer-related death in Saudi *** 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 *** 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 ***:the mean patient age of all HCC cases was 66.8 with a male-to-female ratio of 3.3:*** 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 *** was diagnosed in 79%of *** and sex did not significantly statistically differ in OS among viral and non-viral HCC patients(p-value>0.05).About 65%of patients had tumor size>5 cm during the diagnosis,with a significant statistical difference in OS(p-value=0.027).AFP was>400 ng/ml in 45%of the *** was a statistically significant difference in the OS in terms of AFP levels(p-value=0.021).A statistically significant difference was also observed between the CtP score and OS(p-value=0.02).CtP class B had the longest *** was the most common treatment provided to HCC patients followed by sorafenib *** was a significant statistical difference in OS among viral and non-viral HCC patients(p-value=0.008).Conclusions:the most common predictors for OS were the underlying cause of HCC,AFP,and tumor *** 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： Hepatocellular carcinoma Pattern Alpha-fetoprotein(AFP) Child-turcotte-pugh Progression free survival