检索结果-南通市图书馆

On the apparent line-of-sight alignment of the peak X-ray intensity of the magnetosheath and the tangent to the magnetopause,as viewed by SMILE-SXI

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Earth and Planetary Physics 2024年第1期8卷 155-172页

作者： andrew Read Department of Physics&Astronomy University of LeicesterLeicesterLE17RHUK

The Soft X-ray Imager(SXI)on board the Solar wind Magnetosphere Ionosphere Link Explorer(SMILE)spacecraft will be able to view the Earth’s magnetosheath in soft *** images of the X-ray emission visible from the position of SMILE are created for a range of solar wind densities by using 3 years of the SMILE mission orbit,together with models of the expected X-ray emissivity from the Earth’s *** from global magnetohydrodynamic simulations and a simple model for exospheric neutral densities are used to compare the locations of the lines of sight along which integrated soft X-ray intensities peak with the lines of sight lying tangent to surfaces(defined here to be the magnetopause)along which local soft X-ray intensities peak or exhibit their strongest gradients,or both,for strongly southward interplanetary magnetic field conditions when no depletion or low-latitude boundary layers are ***,in the parameter space of the various times and seasons,orbital phases,solar wind conditions,and magnetopause models,the alignment of the X-ray emission peak with the magnetopause tangent is good,or is not,is *** main results are as *** spacecraft needs to be positioned well outside the magnetopause;low-altitude times near perigee are not *** addition,there are seasonal aspects:dayside-apogee orbits are generally very good because the spacecraft travels out sunward at high altitude,but nightside-apogee orbits,behind the Earth,are bad because the spacecraft only rarely leaves the ***-apogee and dawnapogee orbits are ***-apogee orbits worsen slightly over the first three mission years,whereas nightside-apogee orbits improve ***,many more times of good agreement with the peak-to-tangent hypothesis occur when the solar wind is in a high-density state,as opposed to a low-density *** a high-density state,the magnetopause is compressed,and the spacecraft is more often a good d

关键词： X-rays magnetosphere magnetosheath magnetopause Solar wind Magnetosphere Ionosphere Link Explorer(SMILE) Earth solar wind charge exchange

在线全文

学校读者我要写书评

暂无评论

癌症患者的抑郁和焦虑

英国医学杂志中文版 2018年第8期21卷 461-468页

作者： Alexandra Pitman Sahil Suleman Nicholas Hyde andrew hodgkiss 何毅(译) 于欣(校) St George's University Hospitals NHS Foundation Trust London UK UCL Division of Psychiatry London UK Central & North West London NHS Foundation Trust London UK The Royal Marsden NHS Foundation Trust London UK Institute of Psychiatry Psychology & NeuroscienceKings College London London UK 北京大学肿瘤医院临床心理科北京大学精神卫生研究所

癌症治疗的进展意味着现在被诊断为癌症的人中有一半可以存活至少10年以上，表明许多癌症是一种长期的状况。精神疾病如抑郁和焦虑是癌症常见的并发症，但往往被忽视，影响生活质量、治疗依从性、癌症生存期以及治疗费用2-30在癌症全程... 详细信息

癌症治疗的进展意味着现在被诊断为癌症的人中有一半可以存活至少10年以上，表明许多癌症是一种长期的状况。精神疾病如抑郁和焦虑是癌症常见的并发症，但往往被忽视，影响生活质量、治疗依从性、癌症生存期以及治疗费用2-30在癌症全程中的任何时点，无论是在治愈性治疗还是缓和治疗中，癌症患者的抑郁和焦虑发生率最高可达20％和10％。

关键词：癌症患者情绪抑郁症

Large quantum alphabets with a tiny footprint

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Light(Science & Applications) 2024年第9期13卷 1701-1703页

作者： Fazilah Nothlawala andrew Forbes School of Physics University of the WitwatersrandJohannesburgSouth Africa

High-dimensional quantum states are known to offer advantages over their two-dimensional qubit counterparts,but their preparation and manipulation has been bulky and ***,quantum state control has been demonstrated on-chip with a~1μm2 footprint and nm-scale features,producing up to eight-dimensional quantum states and ushering in a new route to large quantum information encoding on a small footprint.

关键词： quantum states dimensional

10-Minute Consultation Exploring low mood in a person with cancer

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

英国医学杂志中文版 2018年第11期21卷 673-675页

作者： Alexandra Pitman Sahil Suleman Nicholas Hyde andrew hodgkiss St George's University Hospitals NHS Foundation Trust LondonUK UCL Division of Psychiatry LondonUK Central &North West London NHS Foundation Trust LondonUK The Royal Marsden NHS Foundation Trust LondonUK Institute of Psychiatry Psychology &NeuroscienceKings College LondonLondonUK

A 54 year old man asks his doctor for a sleeping tablet. He has recently been diagnosed with a Dukes B adenocarcinoma of the rectum and seems low in mood. Although he has been given a good prognosis,has completed neoadjuvant chemotherapy,and is booked for curative surgery shortly,he expresses doubts that he will live much *** doctor wonders if he might be depressed or anxious,and how best to address this.

关键词：

Mshpy23:a user-friendly,parameterized model of magnetosheath conditions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Earth and Planetary Physics 2024年第1期8卷 89-104页

作者： Jaewoong Jung Hyunju Connor andrew Dimmock Steve Sembay andrew Read Jan Soucek NASA Goddard Space Flight Center GreenbeltMDUSA Department of Astronomy University of MarylandCollege ParkMDUSA Swedish Institude of Space Physics UppsalaSweden University of Leicester LeicesterUK Institute of Atmospheric Physics Academy of Sciences of the Czech Republic

Lunar Environment heliospheric X-ray Imager(LEXI)and Solar wind−Magnetosphere−Ionosphere Link Explorer(SMILE)will observe magnetosheath and its boundary motion in soft X-rays for understanding magnetopause reconnection modes under various solar wind conditions after their respective launches in 2024 and *** conditions,namely,plasma density,velocity,and temperature,are key parameters for predicting and analyzing soft X-ray images from the LEXI and SMILE *** developed a userfriendly model of magnetosheath that parameterizes number density,velocity,temperature,and magnetic field by utilizing the global Magnetohydrodynamics(MHD)model as well as the pre-existing gas-dynamic and analytic *** this parameterized magnetosheath model,scientists can easily reconstruct expected soft X-ray images and utilize them for analysis of observed images of LEXI and SMILE without simulating the complicated global magnetosphere ***,we created an MHD-based magnetosheath model by running a total of 14 OpenGGCM global MHD simulations under 7 solar wind densities(1,5,10,15,20,25,and 30 cm)and 2 interplanetary magnetic field Bz components(±4 nT),and then parameterizing the results in new magnetosheath *** compared the magnetosheath model result with THEMIS statistical data and it showed good agreement with a weighted Pearson correlation coefficient greater than 0.77,especially for plasma density and plasma ***,we compiled a suite of magnetosheath models incorporating previous magnetosheath models(gas-dynamic,analytic),and did two case studies to test the *** MHD-based model was comparable to or better than the previous models while providing self-consistency among the magnetosheath ***,we constructed a tool to calculate a soft X-ray image from any given vantage point,which can support the planning and data analysis of the aforementioned LEXI and SMILE missions.A release of the code has been uploaded to a Git

关键词： magnetosheath python modeling

Controlling the hidden parity in vectorial light with metasurfaces

在线全文

学校读者我要写书评

暂无评论

Advanced Photonics 2024年第4期6卷 5-6页

作者： Cade Peters andrew Forbes University of the Witwatersrand School of PhysicsJohannesburgSouth Africa

Identifying and controlling new degrees of freedom in structured light has exploded of late.1One such form of structured light is vectorial beams with spatially inhomogeneous polarization structures,already having fou... 详细信息

关键词： light parity inhomogeneous

Rational Schur Superalgebras

在线全文

学校读者我要写书评

暂无评论

Algebra Colloquium 2024年第2期31卷 209-220页

作者： andrew Riesen Shun-Jen Cheng Department of Mathematical and Statistical Sciences University of Alberta 1132489 Ave NWEdmontonAlbertaCanada 不详

We develop and study the generalization of rational Schur algebras to the super *** to the classical case,this provides a new method for studying rational supermodules of the general linear supergroup GL(m|n).Furthermore,we establish a Schur-Weyl duality result for rational Schur superalgebras and conclude that under certain conditions these objects will be semisimple.

关键词： Schur algebra supermathematics general linear supergroup

Palladium-catalyzed S_(N)2 glycosylation of phenols

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2024年第4期67卷 1037-1038页

作者： Yu Zhu P.andrew Evans Department of Chemistry Queen’s University90 Bader LaneKingstonK7L 3N6Canada Xiangya School of Pharmaceutical Sciences Central South UniversityChangsha 410013China

Glycosides are essential structural motifs present in an array of important medicines,materials,and natural products[1].Nevertheless,the chemo-and stereoselective construction of the glycosidic linkage is a long-standing challenge because relatively minor variations in the glycosyl donor or acceptor’s structure can impact stereoselectivity,thus influencing the product's functional properties.

关键词： properties Palladium catalyzed

Multidimensional images and aberrations in STEM

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2024年第9期33卷 68-74页

作者： Eric R.Hoglund andrew R.Lupini Center for Nanophase Materials Sciences Oak Ridge National LaboratoryOak RidgeTN 37831United States

Recent advances in scanning transmission electron microscopy(STEM)have led to increased development of multidimensional STEM imaging modalities and novel image reconstruction *** interest arises because the main electron lens in a modern transmission electron microscope usually has a diffraction-space information limit that is significantly better than the real-space resolution of the same *** state-of-affairs is sometimes shared by other scattering methods in modern physics and contributes to a broader excitement surrounding multidimensional techniques that scan a probe while recording diffraction-space images,such as ptychography and scanning nano-beam ***,the contrasting resolution in the two spaces raises the question as to what is limiting their effective ***,we examine this paradox by considering the effects of aberrations in both image and diffraction planes,and likewise separate the contributions of pre-and post-sample *** consideration provides insight into aberration-measurement techniques and might also indicate improvements for super-resolution techniques.

关键词： scanning transmission electron microscopy (STEM) aberrations