Journal of Advances in Physics最新文献

筛选
英文 中文
The Structure of Space and its Impact on Interplanetary Travel and Answers to Fundamental Cosmological Questions 空间结构及其对行星际旅行的影响以及对基本宇宙学问题的回答
Journal of Advances in Physics Pub Date : 2022-04-17 DOI: 10.24297/jap.v20i.9215
N. Sobolewska, Joanna Paulina Sobolewska, Marek Juliusz Sobolewski, M. Sobolewski, D. Sobolewski
{"title":"The Structure of Space and its Impact on Interplanetary Travel and Answers to Fundamental Cosmological Questions","authors":"N. Sobolewska, Joanna Paulina Sobolewska, Marek Juliusz Sobolewski, M. Sobolewski, D. Sobolewski","doi":"10.24297/jap.v20i.9215","DOIUrl":"https://doi.org/10.24297/jap.v20i.9215","url":null,"abstract":"The article presents the far-reaching implications of the theory entitled \"Theory of Space\" (Sobolewski D. S., Theory of Space, 2016) (Sobolewski D. S., Theory of Space, 2017) (Sobolewski D. S., Theory of Space, 2022 - new unpublished edition) and of the publication \"New Generations of Rocket Engines\" (Sobolewska, Sobolewska, Sobolewski, Sobolewski, & Sobolewski, 2021). Among others, it presents the shape of curved space in E4 for selected planets of the solar system and the Sun, taking into account boundary hypersurfaces  and gravitational interactions. The existence of space tunnels was analysed and the perspective of new technologies enabling interplanetary travel was outlined. Furthermore, due to the revealed structure of space, cosmological issues including the existence of other Universes and possible effects of their interactions are addressed. The constant Gdańsk was also introduced GGdańsk which, together with the introduced equation, makes it possible to determine the maximum immersion depth of an astronomical object of mass M.","PeriodicalId":15024,"journal":{"name":"Journal of Advances in Physics","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77498761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Novel Arithmetic Equations for Mass Energy Equivalence, Newton’s Rings Radius, Wavelength and Speed of Light, Fine Structure Constant and Ideal Gas Law Correlated with eπ Based on Sayed’s Theorem 基于赛义德定理的质能等效新算法、牛顿环半径、光的波长和速度、精细结构常数和与epi相关的理想气体定律
Journal of Advances in Physics Pub Date : 2022-03-30 DOI: 10.24297/jap.v20i.9214
S. El-Mongy
{"title":"Novel Arithmetic Equations for Mass Energy Equivalence, Newton’s Rings Radius, Wavelength and Speed of Light, Fine Structure Constant and Ideal Gas Law Correlated with eπ Based on Sayed’s Theorem","authors":"S. El-Mongy","doi":"10.24297/jap.v20i.9214","DOIUrl":"https://doi.org/10.24297/jap.v20i.9214","url":null,"abstract":"Many proved scientific facts are mentioned in the generous Quran. This article introduces revisiting, revising and rewriting of well-established equations and laws of different applied fields of science and engineering. The eπ has been correlated with the mass energy equation of special relativity, fine structure constant, Newton`s rings radius, light wavelength, speed of light and ideal gas law. The correlated formulas were achieved based on the published Sayed`s equations and theorem. The fine structure constant was calculated and compared with a published value with 8.6435x10-5 discrepancy percentage. The novel deduced equations/formulas can be considered as confident mathematical expressions to be parallel used in the abovementioned and other scientific fields.","PeriodicalId":15024,"journal":{"name":"Journal of Advances in Physics","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87937487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Biophysical Characterization of (DOX-NPtm): FTIR and DSC Studies (DOX-NPtm)的生物物理特性:FTIR和DSC研究
Journal of Advances in Physics Pub Date : 2022-03-03 DOI: 10.24297/jap.v20i.9194
Amal Abdullah Al Mutairi, Mohsen Mahmoud Mady
{"title":"Biophysical Characterization of (DOX-NPtm): FTIR and DSC Studies","authors":"Amal Abdullah Al Mutairi, Mohsen Mahmoud Mady","doi":"10.24297/jap.v20i.9194","DOIUrl":"https://doi.org/10.24297/jap.v20i.9194","url":null,"abstract":"Doxorubicin loaded into liposomes grafted with polyethylene glycol (PEG) has been demonstrated to have a longer circulation time and lower cardiotoxicity than doxorubicin (DOX). This study aims to investigate the biophysical characterization of a marketed formulation DOX-encapsulated liposome (DOX-NPTM). The interactions between doxorubicin and liposomal lipids can help in liposomal development. The liposome and DOX-NPTM were characterized in terms of differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FTIR). The rheological properties of liposomal samples were also measured. Physical interactions may be occurred between the drug functional groups and liposomal lipids, probably by weak hydrogen bond formation or weak bond formation due to dipole-dipole interaction. There was no shift of existing peaks or appearance of new peaks was detected between the characteristic peaks of the liposomal lipids were present in the DOX-encapsulated liposome sample. This suggests that there were physical interactions that took place only between the drug and lipids and no chemical interaction between them. DSC information shows that the phase transition temperature shifts to lower temperature degrees after loading of DOX into the liposomes. The DSC curve has a small broadening. This may infer a little cooperativity decrease between acyl chains of liposomal membranes after DOX inclusion. The encapsulation of DOX into liposomes decreases the plastic viscosity of liposomes (from 1.64 to 1.48 cP), which shows that the membrane fluidity was increased.","PeriodicalId":15024,"journal":{"name":"Journal of Advances in Physics","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88309361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The second revolution of relativity 相对论的第二次革命
Journal of Advances in Physics Pub Date : 2022-02-08 DOI: 10.24297/jap.v20i.9179
Amar Merouani
{"title":"The second revolution of relativity","authors":"Amar Merouani","doi":"10.24297/jap.v20i.9179","DOIUrl":"https://doi.org/10.24297/jap.v20i.9179","url":null,"abstract":"Energy, this vital entity that we need, and that everyone consumes and liberates, in different forms, has been since the dawn of time the greatest concern of the human being. Over the centuries, energy has transformed lifestyles in all societies of the world, contributing to the emergence of new cities and major cosmopolitan cities. Scientific research has contributed to much of this extraordinary advance of energy in the conquest of the world, thanks to the many works and discoveries of scientists from the golden age of Islamic civilization to the renaissance in Europe, to the great technological revolution that has emerged in the North and in the South. The continuous need for energy has always been the main driver, for various discoveries, whether related to energy matter or those related to energy reactions. Between pure matter and an active reaction, energy has become the focus of several hybrid studies, manipulating energy as a source on the one hand, and as a finished product on the other.\u0000While most of the work carried out on the electric current, during the first years of the 17th century [1], showed the precariousness of the materials as regards their conductivity, the arrival on the scientific scene of new chemical elements, discovered then around the 18th century, have strengthened the quality of the works and consequently the improvement of the electrical productivity in the world. Nuclear energy will suffer the same fate of development as that of electrical energy, passing through critical periods, especially those relating to the discovery of high-activity materials [2].Nevertheless, the arrival at the beginning of the 18th of the famous formula of Albert Einstein on relativity, (E= mc2) [3], put an end to the major concerns of scientists on energy, to know finally, the nature and value of the energy compensation of the material during its activity.\u0000We, in turn, consider that Albert Einstein’s formula is not entirely sufficient to decipher the true energetic reality of matter. Our work is a re-shaping of the relativistic formula, not only from the physical point of view but also from the mathematical point of view. As a result, our contribution to this restoration pleads for a new apprehension of the atom as an «original copy of the universe» which has an infinity of nanoscopic particles, which remain active within matter, Chemically active and physically metastable. This extrapolation of the relativistic formula will recognize to energy the other side of its independence from matter.","PeriodicalId":15024,"journal":{"name":"Journal of Advances in Physics","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77564905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Innovative Theoretical Correlation of eπ With Mass, Number of Atoms and Enrichment Percentage (%E) Using Sayed’s Enrichment Formula 利用Sayed的富集公式,创新地推导了epi与质量、原子数和富集百分比(%E)的理论关联
Journal of Advances in Physics Pub Date : 2022-01-27 DOI: 10.24297/jap.v20i.9180
S. El-Mongy
{"title":"Innovative Theoretical Correlation of eπ With Mass, Number of Atoms and Enrichment Percentage (%E) Using Sayed’s Enrichment Formula","authors":"S. El-Mongy","doi":"10.24297/jap.v20i.9180","DOIUrl":"https://doi.org/10.24297/jap.v20i.9180","url":null,"abstract":"This article introduces an innovative theoretical correlation between eπ and enrichment percentage (%E) assay. Based on the published Sayed`s theorem and its applications, a simple equation was derived to calculate the %E. Different formulas for enrichment percentage calculation are also presented in this work. The theoretical calculations using the eπ formula show results with deviation from 0.96 to ~2.8%. A correlation between eπ, number of atoms (N), count rate (C), half life time (T1/2), efficiency (η) of the detector at specific energy, the branching ratio (Iγ), Avogadro`s number (AN), atomic weight (AW) and mass (M) was also found and elucidated. It can sharply state that this is first time to calculate the %E correlated with eπ by using what is called Sayed`s enrichment formula. The correlation of eπ and N AW AN M η Iγ T1/2 is a unique and pioneer scientific approach in the nuclear fields.","PeriodicalId":15024,"journal":{"name":"Journal of Advances in Physics","volume":"59 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77905505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Four Bosons EM Gauge Invariance and EM Flux 四玻色子电磁规范不变性与电磁通量
Journal of Advances in Physics Pub Date : 2021-10-25 DOI: 10.24297/jap.v19i.9054
J. Chauca, R. Doria, R. Soares
{"title":"Four Bosons EM Gauge Invariance and EM Flux","authors":"J. Chauca, R. Doria, R. Soares","doi":"10.24297/jap.v19i.9054","DOIUrl":"https://doi.org/10.24297/jap.v19i.9054","url":null,"abstract":"Electromagnetic phenomena is based on electric charge and spin. However, Maxwell equations are just macroscopic. There is a microscopic EM phenomena to be understood. A performance originated from electric charge microscopic behavior. Thus, keeping on mind the two basic EM postulates, which are light invariance and charge conservation, Maxwell is extended to a Four Bosons Electromagnetism. It says that, the macroscopic Maxwell equations does not describe all electromagnetism. The electric charge physics has been studied microscopically through elementary particle physics. A new perception of EM phenomena emerges based on three interconnected charges {+, 0, −} under four intermediated bosons {Aµ, Uµ, V±µ }. From Maxwell photon, EM becomes a systemic cooperation between four fields. This quadruplet originates a new electric charge physics. New features for electric charge conservation, exchange, conduction, interaction are derived. The research is to analyze the Four Bosons Electromagnetism gauge invariance and EM flux. The model is studied under U(1), SO(2)global and U(1)×SO(2)global symmetries. Two approaches are considered. Based on fields strengths and on fields. A gauge invariant quadruplet physics is obtained under free coefficients conditions. A nonlinear EM flux appears. Without requiring electric charge as source nonlinear fields work as own sources for flowing spin-1 and spin-0 waves and particles. It flows through a four potential field quadruplet, granular and collective fields strengths. A self contained EM is constituted providing a nonlinear physicality that precedes physical constants as electric charge and medium parameters. The EM meaning is enlarged and we have to understand on the physical structures generated by this antireductionist nonlinear four bosons microscopic electromagnetism. Determine the corresponding fields blocks which are real and gauge invariants. They are identified as the electromagnetic domains. The Four Bosons EM develops interdependent EM domains. Interlaced physical sectors sharing a common EM energy context. Lagrangian, equations of motion, conservation laws are expressing such domains physics. They correspond to physical sectors where each one contains its own EM energy.","PeriodicalId":15024,"journal":{"name":"Journal of Advances in Physics","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75192505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Common-Sense Rejected by Physicists: 被物理学家拒绝的常识:
Journal of Advances in Physics Pub Date : 2021-09-25 DOI: 10.24297/jap.v19i.9115
Jeffrey H. Boyd
{"title":"Common-Sense Rejected by Physicists:","authors":"Jeffrey H. Boyd","doi":"10.24297/jap.v19i.9115","DOIUrl":"https://doi.org/10.24297/jap.v19i.9115","url":null,"abstract":"\u0000\u0000\u0000We propose a new integration of relativity and quantum mechanics (QM). Your cell phone or smart phone is a rich source of empirical information about relativity. It tells time based on a system called Coordinated Universal Time (UTC) which assumes absolute simultaneity: all observers in all inertial frames observe the same sequence of all events. You must choose whether to trust the time on your cell phone, or trust Einstein’s incompatible ideas about a space-time continuum. As concerns QM, the existence of “weirdness” means a mistake was made in QM’s starting assumptions. This article finds and corrects that mistake and presents for the first time, a quantum world free of all weirdness. There is another half to nature, previously unrecognized. It is devoid of energy and matter, namely zero-energy Elementary Waves which move within the medium of aether. We derive the linear wave PDE’s. There is evidence that Elementary Waves are in control of nature, despite their lack of energy. The existence of UFO’s (Unidentified Flying Objects) suggests that someone has learned how to control Elementary Waves. If we could learn from the UFO’s, we might acquire a decisive advantage in our battle against climate change.\u0000\u0000\u0000","PeriodicalId":15024,"journal":{"name":"Journal of Advances in Physics","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73938912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
KEPLER – NEWTON – LEIBNIZ – HEGEL
Journal of Advances in Physics Pub Date : 2021-09-15 DOI: 10.24297/jap.v19i.9106
Abdul Malek
{"title":"KEPLER – NEWTON – LEIBNIZ – HEGEL","authors":"Abdul Malek","doi":"10.24297/jap.v19i.9106","DOIUrl":"https://doi.org/10.24297/jap.v19i.9106","url":null,"abstract":"Kepler’s Laws of planetary motion (following the Copernican revolution in cosmology), according to Leibniz and his follower Hegel, for the first-time in history discovered the keys to what Hegel called the absolute mechanics mediated by dialectical laws, which drives the celestial bodies, in opposition to finite mechanics in terrestrial Nature developed by mathematical and empirical sciences, but that are of very limited scope. Newton wrongly extended and imposed finite mechanics on the absolute mechanics of the cosmic bodies in the form of his Law of one-sided Universal Gravitational Attraction, by distorting and misrepresenting Kepler’s profound laws and in opposition to Leibniz’s more appropriate “Radial Planetary Orbital Equation”. The still-prevailing error by Newton (notwithstanding his well known manipulation of science for selfish ends), not only shows the limitation of mathematical idealism and prejudice driven modern cosmology in the form of Einstein’s theories of relativity; but also, have made gaining positive knowledge of the cosmos an impossibility and has impaired social/historical development of humanity by reinforcing decadent ruling ideas. Hegel’s Naturphilosophie is not only a protest against the misrepresentation of Kepler’s Laws in particular; his Enzyklopädie der Philosophischem Wissenschaften is the negation and the direct rebuttal of Newtonian physics and Philosophiæ Naturalis Principia Mathematica, in general. Modern natural science ignores Leibniz and Hegel at its own peril! Kepler’s phenomenological laws of planetary motion and the dialectical insights of Leibnitz and Hegel opens the way for gaining positive knowledge of the dynamics, structure and the evolution of the cosmic bodies and other cosmic phenomena; without invoking mysteries and dark/black cosmic entities, which has been the pabulum of official astrophysics and cosmology so far.","PeriodicalId":15024,"journal":{"name":"Journal of Advances in Physics","volume":"58 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84870555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Drop Size Distribution and Lightning Manifestations in AMMA-CATH Area AMMA-CATH区域雨滴大小分布与闪电表现
Journal of Advances in Physics Pub Date : 2021-09-08 DOI: 10.24297/jap.v19i.9102
Adéchinan A. Joseph, Moumouni Sounmaïla, G. François, Houngninou B. Etienne
{"title":"Drop Size Distribution and Lightning Manifestations in AMMA-CATH Area","authors":"Adéchinan A. Joseph, Moumouni Sounmaïla, G. François, Houngninou B. Etienne","doi":"10.24297/jap.v19i.9102","DOIUrl":"https://doi.org/10.24297/jap.v19i.9102","url":null,"abstract":"This paper analyses for the first time in tropical area, the relationship between lightning and DSD (Drop Size Distribution) parameters on rainy events that occurred during the monsoon period. The Lightning data used are collected by the LINET (Lightning Detection Network) while the DSD data were recorded by a distrometer. The correlation was computed within five circles of radius varying between  to  with a step of . These consecutive areas are centered on the position of the disdrometer. By taking into account only the convective spectra and remove out of the data the cases where there is rain without any lightning and vice versa, all data was computed with a time scale of one minute during each of the rainy events .The results showed that the exponential and polynomial laws fit better our data than the power and linear laws. The highest correlation coefficients are obtained within a radius of about 20 km around the distrometer location. The correlation between the parameter  and  is the most stable with a correlation coefficient equal to .","PeriodicalId":15024,"journal":{"name":"Journal of Advances in Physics","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84562554","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Magnetism: Insights from the Thomas Young Experiment 磁性:托马斯·杨实验的启示
Journal of Advances in Physics Pub Date : 2021-07-30 DOI: 10.24297/jap.v19i.9090
Bhekuzulu Khumalo
{"title":"Magnetism: Insights from the Thomas Young Experiment","authors":"Bhekuzulu Khumalo","doi":"10.24297/jap.v19i.9090","DOIUrl":"https://doi.org/10.24297/jap.v19i.9090","url":null,"abstract":"The principles of Thomas Young’s double slit experiment are used to find out further the nature of magnetism. This paper shows that not only can magnetism be defined as a wave but it allows us to understand the nature of all waves and concept of polarization in quantum mechanics. A wave pattern results from the interactions. It is something else before it organizes into a wave formation. In all, because of the nature of magnetic phenomenon, it must be studied at close range with the double slit experiment.  This gives an incredibly unique insight. All data  is available at figshare.com to share.","PeriodicalId":15024,"journal":{"name":"Journal of Advances in Physics","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91007656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信