检索结果-南通市图书馆

Journal of Modern Ph.sics 2024年第7期15卷 1010-1035页

作者： Joseph.h. (Cass) Forrington Managing Editor Journal of Cosmology California USA

Th.s is a Unified Field description based on th. h.lograph.c Time Dilation Cosmology, TDC, model, wh.ch.is an eternal continuum evolving forward in th. forward direction of time, at th. speed of ligh., c, at an invariant 1 s/s rate of time. Th.s is th. Fundamental Direction of Evolution, FDE. Th.re is also an evolution down time dilation gradients, th. Gravitational Direction of Evolution, GDE. Th.se evolutions are gravity, wh.ch.is th. evolutionary force in time. Gravitational velocities are compensation for th. difference in th. rate of time, dRt, in a dilation field, and th. dRtis equal to th. compensatory velocity’s percentage of c, and is a measure of th. force in time inducing th. velocity. In applied force induced velocities, th. dRt is a measure of th. resistance in time to th. induced velocity, wh.ch.migh. be called “anti-gravity” or “negative gravity”. Th. two effects keep th. continuum uniformly evolving forward at c. It is demonstrated th.t gravity is already a part of th. electromagnetic field equations in way of th. dRt element contained in th. TDC velocity formula. Einstein’s energy formula is defined as a velocity formula and a modified version is used for ch.rged elementary particle solutions. A time dilation-based derivation of th. Lorentz force ties gravity directly to th. electromagnetic field proving th. unified field of gravity and th. EMF. It is noted h.w we could possibly create gravity drives. Th.s is followed by a discussion of black h.les, proving supermassive objects, like massive black h.le singularities, are impossible, and th.t black h.les are massless Magnetosph.ric Eternally Collapsing Objects (MECOs) th.t are vortices in spacetime. .

关键词： Unified Field Gravity Anti-Gravity Astroph.sics Einstein General Relativity Special Relativity Galactic Rotation Velocities Time Dilation Spacetime Space Time Spacetime Continuum Quantum Continuum MECO Black h.le Event h.rizon Timelike Spacelike Ligh.like

来源：

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

Extinction of Ligh. in th. Galactic h.lo: First Observational Evidence of th. Interaction of Ligh. and Dark Matter

引用

Journal of Modern Ph.sics 2024年第8期15卷 1144-1198页

作者： Ch.rles h. McGruder III Department of Ph.sics and Astronomy Western Kentucky University Bowling Green USA

We study th. distribution of quasars on th. celestial sph.re according to ground-based SDSS and space-based WISE and Gaia observations. All distributions as a function of galactic latitude, b, exh.bit a decrease in quasar frequency well outside th. dust in and near th. galactic plane. We prove th.t th. observed decrease in quasar frequency at h.gh.galactic latitudes is not accompanied by reddening, meaning th.t it can not be caused by dust. Th. scattering of ligh. by th. circumgalactic gas is negligible because th. Th.mson scattering cross section is very small. We conclude th. observed scattering of ligh. must be caused by dark matter in th. galactic h.lo. We determine th. mass and ch.rge of dark matter particles. If th. dark matter particle is a fermion its mass, mDMand ch.rge eDM=δe, wh.re e is th. elementary ch.rge are: mDM=3.2×10−2eV and δ=3.856×10−5. If h.wever th. dark matter particle is spinless th.n: mDM=0.511eV and δ=2.132×10−4. Th.se values for th. ch.rge of a dark matter particle are orders of magnitude h.gh.r th.n th. upper limit of th. neutrino ch.rge according to laboratory experiments. Consequently, dark matter particles are not ch.rged neutrinos. Since dark matter particles are ch.rged, th.y must emit and absorb electromagnetic radiation. h.wever, PDM~δ2, or: PDM~1.487×10−9Pe, wh.re Peis th. power output of a single electron.

关键词： Milky Way Dark Matter h.lo (1049)

来源：

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

Time Dilation Cosmology 2

引用

Journal of Modern Ph.sics 2024年第4期15卷 448-461页

作者： Joseph.h. (Cass) Forrington Managing Editor Journal of Cosmology California USA

Th.s paper is a furth.r elaboration of th. auth.r’s Time Dilation Cosmology (TDC) h.lograph.c model th.t ties gravitation and celestial mech.nics and kinematics directly to time dilation, resolving all th. major conundrums in astroph.sics, and ties astroph.sics directly to quantum ph.sics. It begins with.a brief summary of th. TDC model and contains th. new derivation for th. time dilation version of th. formula for summing relativistic velocities, Einstein’s gravitational constant and th. time dilation versions for th. Lorentz factor and th. Euclidean norm of th. 3d velocity vector, th. two of wh.ch.can th.n be used in th. Four-velocity formula. It is demonstrated h.w orbital curvature is manifested as th. resultant of two time dilation-manifested velocities. It also explains wh. an interferometer cannot distinguish.free fall from zero gravity and furth.r elaborates on th. auth.r’s previous explanations of h.w spiral galaxies are formed, and contains math.matical proof th.t Black h.les are actually Magnetosph.ric Eternally Collapsing Objects (MECOs) th.t are massless spacetime vortices.

关键词： Gravitation Time Time Dilation Celestial Mech.nics ISM: Kinematics and Dynamics Cosmology: Th.ory Galaxies: Evolution

来源：

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

Cosmology with.ut th. Cosmological Principle and with.ut Violating th. Copernican Principle: Taub-NUT Universe

引用

Journal of Modern Ph.sics 2024年第8期15卷 1069-1096页

作者： Ch.rles h. McGruder III Department of Ph.sics and Astronomy Western Kentucky University Bowling Green Kentucky USA

We develop a th.ory of cosmology, wh.ch.is not based on th. cosmological principle. We ach.eve th.s with.ut violating th. Copernican principle. It is well known th.t th. gravitational redsh.ft associated with.th. Sch.arzsch.ld solution applied to th. distant supernova does not lead to th. observed redsift-distance relationsh.p. We sh.w, h.wever, th.t generalizations of th. Sch.arzsch.ld metric, th. Taub-NUT metrics, do indeed lead to th. observed redsh.ft-distance relationsh.p and to th. observed time dilation. Th.se universes are not expanding rath.r th. observed cosmological redsh.ft is due to th. gravitational redsh.ft associated with.th.se solutions. Time dilation in th.se stationary universes h.s th. same dependency on redsh.ft th.t generally h.s been seen as proof th.t space is expanding. Our th.ory resolves th. h.bble tension.

关键词： Cosmology General Relativity

来源：

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

Flexible neural probes:a review of th. current advantages,drawbacks,and future demands

引用

Journal of Zh.jiang University-Science B(Biomedicine & Biotech.ology) 2024年第2期25卷 153-167页

作者： Sara PIMENTA Joao R.FREITAS Joséh.CORREIA CMEMS-UMinh. University of MinhoGuimarães4800-058Portugal LABBELS-Associate Laboratory Braga/GuimarãesPortugal

Brain diseases affect millions of people and h.ve a h.ge social and economic *** use of neural probes for studies in animals h.s been th. main approach.to increasing knowledge about neural network ***,neuroscientists are trying to develop new and more effective th.rapeutic approach.s to treating neurological *** implementation of neural probes with.multifunctionalities(electrical,optical,and fluidic interactions)h.s been increasing in th. last few years,leading to th. creation of devices with.h.gh.temporal and spatial *** th. applicability of,and elements integrated into,neural probes h.s also led to th. necessity to create flexible interfaces,reducing neural tissue damage during probe implantation and increasing th. quality of neural acquisition *** th.s paper,we review th. fabrication,ch.racterization,and validation of several types of flexible neural probes,exploring th. main advantages and drawbacks of th.se ***,future developments and applications are ***,th.s review aims to present th. currently available flexible devices and future appropriate avenues for development as possible guidance for future engineered devices.

关键词： Brain knowledge Flexible interface Multifunctional probe

来源：

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

Optimizing Average Electric Power During th. Ch.rging of Lith.um-Ion Batteries Th.ough.th. Taguch. Meth.d

引用

Transactions of Tianjin University 2024年第2期30卷 152-166页

作者： Moh. h.S.Alrash.an Department of Electrical Engineering Al-Hussein Bin Talal UniversityMaan 71110Jordan

In recent times, lith.um-ion batteries h.ve been widely used owing to th.ir h.gh.energy density, extended cycle lifespan, and minimal self-disch.rge rate. Th. design of h.gh.speed rech.rgeable lith.um-ion batteries faces a significant ch.llenge owing to th. need to increase average electric power during ch.rging. Th.s ch.llenge results from th. direct influence of th. power level on th. rate of ch.mical reactions occurring in th. battery electrodes. In th.s study, th. Taguch. optimization meth.d was used to enh.nce th. average electric power during th. ch.rging process of lith.um-ion batteries. Th. Taguch. tech.ique is a statistical strategy th.t facilitates th. systematic and efficient evaluation of numerous experimental variables. Th. proposed meth.d involved varying seven input factors, including positive electrode th.ckness, positive electrode material, positive electrode active material volume fraction, negative electrode active material volume fraction, separator th.ckness, positive current collector th.ckness, and negative current collector th.ckness. Th.ee levels were assigned to each.control factor to identify th. optimal conditions and maximize th. average electric power during ch.rging. Moreover, a variance assessment analysis was conducted to validate th. results obtained from th. Taguch. analysis. Th. results revealed th.t th. Taguch. meth.d was an eff ective approach.for optimizing th. average electric power during th. ch.rging of lith.um-ion batteries. Th.s indicates th.t th. positive electrode material, followed by th. separator th.ckness and th. negative electrode active material volume fraction, was key factors significantly infl uencing th. average electric power during th. ch.rging of lith.um-ion batteries response. Th. identification of optimal conditions resulted in th. improved performance of lith.um-ion batteries, extending th.ir potential in various applications. Particularly, lith.um-ion batteries with.average electric power of 16 W and 17

关键词： Lith.um-ion batteries Average electric power during ch.rging Taguch. meth.d COMSOL Multiph.sics software C rate L27 orth.gonal array

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Energy Design and Optimization of Greenh.use by Natural Convection

引用

Fluid Dynamics & Materials Processing 2024年第8期20卷 1903-1913页

作者： h.Benzzine h.Labrim Aouatif Saad Y.Ach.ur D.Zejli R.El Bouayadi Advanced Systems Engineering Laboratory(ASELab) National School of Applied SciencesIbn Tofail UniversityKenitraMorocco

Th.s study addresses th. pressing need for energy-efficient greenh.use management by focusing on th. innovative application of natural *** primary objective of th.s study is to evaluate various ventilation strategies to enh.nce energy efficiency and optimize crop production in agricultural *** advanced numerical simulation tools,th. study conducts a compreh.nsive assessment of natural ventilation’s effectiveness under real-world *** results underscore th. crucial role of th. stack effect and strategic window positioning in greenh.use cooling,providing valuable insigh.s for greenh.use *** findings sh.d ligh. on th. significant benefits of optimized ventilation and also offer practical implications for improving greenh.use design,ensuring sustainable and efficient agricultural *** study demonstrated energy savings in cooling from November to April,with.a maximum saving of 680 kWh.in March.indicating th. effectiveness of strategically positioning windows to leverage th. stack *** approach.enh.nces plant growth.and reduces th. need for costly cooling systems,th.reby improving overall energy efficiency and lowering operational expenses.

关键词： Energy greenh.use cooling natural ventilation simulation temperature

来源：

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

In situ TEM investigation of electron irradiation and aging-induced h.gh.density nanoprecipitates in an Mg-10Gd-3Y-1Zn-0.5Zr alloy

引用

Journal of Magnesium and Alloys 2024年第5期12卷 1841-1853页

作者： M.Lv h.L.Ge Q.Q.Jin X.h.Sh.o Y.T.Zh.u B.Zh.ng X.L.Ma Sh.nyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of Sciences72 Wenhua RoadShenyang 110016China Sch.ol of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Materials Science and Engineering Research.Center Guangxi University of Science and TechnologyLiuzhou 545006China

In-situ electron irradiation and aging are applied to introduce h.gh.density precipitates in an Mg-10Gd-3Y-1Zn-0.5Zr(GWZ1031K,wt.%)alloy to improve th. *** results sh.w th.t th. h.rdness of th. Mg alloy after irradiation for 10 h.and aging for 9 h.at 250℃ is 1.64 GPa,wh.ch.is approximately 64% h.gh.r th.n th.t of th. samples before being *** is mainly attributed to γ'precipitates on th. basal plane after irradiation and th. h.gh.density nanoscale β'precipitates on th. prismatic plane after aging,wh.ch.sh.uld be closely related to th. irradiation-induced h.mogenous *** latter plays a key role in precipitation *** result paves a way to improve th. mech.nical properties of metallic materials by tailoring th. precipitation th.ough.irradiation and aging.

关键词： Mg alloy Electron beam irradiation h.rdening Precipitates In-situ TEM

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Nonlinear boundary control problem of h.perbolic systems

引用

Journal of Control and Decision 2024年第1期11卷 73-83页

作者： A.Bouh.med A.El Kabouss h.Bouzah.r ISTI Lab Ibn Zohr UniversityENSAAgadirMorocco Faculty of sciences Moulay Ismail UniversityMeknesMorocco

Th. paper is devoted to th. study of optimal control of a h.perbolic system,wh.re th. control enters th. system th.ough.th. *** h.perbolic system is th. wave equation on a smooth.and open domain,wh.re th. boundary condition involves th. normal derivative at th. boundary of z,th. time derivative of z times a constant k,and a nonlinear term ***,z is th. state and u is th. control,satisfying some boundedness condition depending on *** functional cost consists of th. energy and th. difference between th. solution of th. system at final time,and a desired state in *** a closed convex set,we prove th. existence of an optimal control th.t minimises th. cost functional using a priori ***,using th. differentiability of th. cost functional with.respect to th. control,we establish.th. ch.racterisation by deriving necessary conditions th.t an optimal control must satisfy.A numerical approach.is successfully illustrated by simulations.

关键词： Non-linear system h.perbolic system boundary control optimal control controllability

来源：

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

On an isotropic porous solid cylinder:th. analytical solution and sensitivity analysis of th. pressure

引用

Applied Math.matics and Mech.nics(English.Edition) 2024年第9期45卷 1499-1522页

作者： h.ASGh.RI L.MILLER R.PENTA J.MERODIO Departamento de Matematica Aplicada a las TIC ETS de Ingenieria de Sistemas InformaticosUniversidad Politecnica de MadridMadrid 28031Spain Sch.ol of Math.matics and Statistics University of GlasgowGlasgow G128QQU.K.

With.n th.s work,we perform a sensitivity analysis to determine th. influence of th. material input parameters on th. pressure in an isotropic porous solid *** provide a step-by-step guide to obtain th. analytical solution for a porous isotropic elastic cylinder in terms of th. pressure,stresses,and elastic *** obtain th. solution by performing a Laplace transform on th. governing equations,wh.ch.are th.se of Biot's poroelasticity in cylindrical polar *** enforce radial boundary conditions and obtain th. solution in th. Laplace transformed domain before reverting back to th. time *** sensitivity analysis is th.n carried out,considering only th. derived pressure *** analysis finds th.t th. time t,Biot's modulus M,and Poisson's ratio ν h.ve th. h.gh.st influence on th. pressure wh.reas th. initial value of pressure P_(0) plays a very little role.

关键词： sensitivity analysis Laplace transform cylindrical polar coordinate Biot's modulus cylinder

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：