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venus程序应力结果线性化处理程序V2MB的研发

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原子能科学技术 2008年第S2期42卷 562-566页

作者：文静杨红义喻宏王明政中国原子能科学研究院快堆工程部北京102413

开发了1套数据处理程序V2MB,对日本商业程序venus计算得到的沿壁厚各节点的应力分量结果采用最小二乘法进行线性化处理,得到了所需的薄膜、薄膜加弯曲应力,为后续的强度评价提供数据。将程序计算结果与国际认可的ANSYS程序及理论解进行... 详细信息

开发了1套数据处理程序V2MB,对日本商业程序venus计算得到的沿壁厚各节点的应力分量结果采用最小二乘法进行线性化处理,得到了所需的薄膜、薄膜加弯曲应力,为后续的强度评价提供数据。将程序计算结果与国际认可的ANSYS程序及理论解进行了比较,它们之间吻合得很好,从而验证了该程序的有效性。

关键词： venus V2MB 应力线性化

Evaluation and Exploitation of Retrieval Algorithms for Estimating Biophysical Crop Variables Using Sentinel-2,venus,and PRISMA Satellite Data

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Journal of Geodesy and Geoinformation Science 2020年第4期3卷 79-88页

作者： Raffaele CASA Deepak UPRETI Angelo PALOMBO Simone PASCUCCI Hao YANG Guijun YANG Wenjiang HUANG Stefano PIGNATTI Department of Agriculture Forestry Nature and Energy Universitàdegli Studi daella TusciaVia San Camillo de LellisViterbo 01100Italy Institute of Methodologies for Environmental Analysis Italian National Research CouncilC.da Santa LojaTito ScaloPotenza 85050Italy Beijing Research Center for Information Technology in Agriculture Beijing Academy of Agriculture and Forestry SciencesBeijing 100097China Institute of Remote Sensing and Digital Earth Chinese Academy of SciencesBeijing 100094China

This paper is devoted to the development and testing of the optimal procedures for retrieving biophysical crop variables by exploiting the spectral information of current multispectral optical satellite Sentinel-2 and venus and in view of the advent of the new Sino-EU hyperspectral satellite(e.g.,PRISMA,EnMAP,and GF-5).Two different methodologies devoted to the estimation of biophysical crop variables Leaf area index(LAI)and Leaf chlorophyll content(Cab)were evaluated:non-kernel-based and kernel-based Machine Learning Regression Algorithms(MLRA);Sentinel-2 and venus data comparison for the analysis of the durum wheat-growing season.Results show that for Sentinel-2 data,Gaussian Process Regression(GPR)was the best performing algorithm for both LAI(R 2=0.89 and RMSE=0.59)and Cab(R 2=0.70 and RMSE=8.31).Whereas,for PRISMA simulated data the Kernel Ridge Regression(KRR)was the best performing algorithm among all the other MLRA(R 2=0.91 and RMSE=0.51)for LAI and(R 2=0.83 and RMSE=6.09)for Cab,respectively.Results of Sentinel-2 and venus data for durum wheat-growing season were consistent with ground truth data and confirm also that SWIR bands,which are used as tie-points in the PROSAIL inversion,are extremely useful for an accurate retrieving of crop biophysical parameters.

关键词： biophysical crop parameters PRISMA GF-5 Sentinel 2 venus

Lavinia Fontana’s Galatea: Personification of Fortune and venus

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Journal of Literature and Art Studies 2020年第1期10卷 42-59页

作者： Liana De Girolami Cheney SIELAE Universidad de CorunaSpain

Lavinia Fontana’s(1552-1614)Galatea and Cherubs riding the Stormy Waves on a Sea Monster(aka Galatea)of 1590 is an intriguing mythological painting.Being painted on copper,it is a fine example of Lavinia’s exploration of new artistic techniques and materials as well as testimony to her bold artistic interpretations.Lavinia’s Galatea was part of a private collection in Bologna(Diletta Badeschi).This work fascinates the viewer with its erotic audacity and complex iconographical conceits.Recent scholarship by Daniele Benati,Fausto Gozzi,and Enrico Maria Dal Pozzolo assist in unraveling the meaning of this painting.In this essay there are additional interpretative suggestions.

关键词： mannerism emblems engravings mythology sea monsters symbolism Lavinia Fontana Marcantonio Raimondi Achille Bocchi Andrea Alciato Vincenzo Cartari Galatea Fortune venus

Edward Burne-Jones’s The Mirror of venus: Physical and Intangible Female Beauty

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Journal of Literature and Art Studies 2019年第1期9卷 96-122页

作者： Liana De Girolami Cheney Independent Scholar

The Pre-Raphaelite painter Edward Burne-Jones(1833-1898)conceived the subject of The Mirror of venus between 1865 and 1867.He painted two versions:a small version in gouache and oil and a larger version in oil on canvas.In composing this subject Burne-Jones was inspired by the poetic and chromatic description of a lyrical stanza on“The Hill of venus”in the long epic poem Earthly Paradise,written by his close friend and collaborator William Morris.1 This study comprises three parts:Burne-Jones’s history of the paintings,his iconographical sources,and an iconological interpretation of The Mirror of venus.

关键词： venus astronomy beauty love mirror planet star water symbolism British poetry Neoplatonism Aesthetic Movement Art Nouveau Symbolists

Possible Signs of Life on the Planet venus

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International Journal of Astronomy and Astrophysics 2013年第1期3卷 57-79页

作者： Leonid V. Ksanfomality Space Research Institute of the RAS Moscow Russia

It is possible, the question on the existence of extraterrestrial life will be answered not as a result of its search for in other worlds removed by distances of dozens of parsecs but on the surface of venus, i.e., of the nearest planet of the Solar system. The search for “habitable zones” in extrasolar planetary systems is based on the postulate on “normal” physical conditions, i.e., the pressure, temperature, and maybe atmospheric composition similar to those on Earth. But could not such an approach be a kind of “terrestrial chauvinism”? Considering the conditions on venus as a possible analogue of physical conditions on low-orbiting exoplanets of the “super-Earths” type, a new analysis of venusian surface panoramas’ details has been made. These images were produced by the VENERA landers in 1975 and 1982. A few relatively large objects were found with size ranging from a decimeter to half meter and with unusual morphology. The objects were observed in some images, but were absent in the other or altered their shape. The article presents the obtained results and analyzes the evidence of reality of these objects.

关键词： Extraterrestrial Life venus Physical Conditions

Ablation of venusian oxygen ions by unshocked solar wind

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Science Bulletin 2017年第24期62卷 1669-1672页

作者： Yong Wei Markus Fraenz Edward Dubinin Weixing Wan Tielong Zhang Zhaojin Rong Lihui Chai Jun Zhong Rixiang Zhu Yoshifumi Futaana Stas Barabash Key Laboratory of Earth and Planetary Physics Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China Max-Planck-lnstitute for Solar System Research Goettingen 37077 Germany Space Research Institute Austrian Academy of Sdences Graz 8042 Austria Swedish Institute of Space Physics Kiruna SE-981 28 Sweden College of Earth Sciences University of Chinese Academy of Sciences Beijing 100049 China Institutions of Earth Science Chinese Academy of Sciences BeUing 100029 China

As an Earth-like planet venus probably had a primordial dipole field for several million years after formation of the planet.Since this dipole field eventually vanished the ionosphere of venus has been exposed to the solar wind.The solar wind is shocked near venus,and then scavenges the ionospheric particles through the magnetosheath and the magnetotail.The escape rate of oxygen ions(O^+)estimated from spacecraft observations over the past several decades has manifested its importance for the evolution of planetary habitability,considering the accumulated effect over the history of venus.However,all the previous observations were made in the shocked solar wind and/or inside the wake,though some simulations showed that unshocked solar wind can also ablate O^+ions.Here we report venus Express observations of O^+ions in the unshocked solar wind during the solar minimum.The observations suggest that these O^+ions are accelerated by the unshocked solar wind through pickup processes.The estimated O^+escape rate,2.1×10^(24) ions/s,is comparable to those measured in the shocked solar wind and the wake.This escape rate could result in about 2 cm global water loss over 4.5 billion years.Our results suggest that the atmospheric loss at unmagnetized planets is significantly underestimated by previous observations,and thus we can emphasize the importance of an Earth-like dipole for planetary habitability.

关键词： venus Ion escape Planetary habitability

venus离子源的最新结果(28GHz)(英文)

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Chinese Physics C 2007年第S1期31卷 1-7页

作者： D.Leitner D.S.Todd M.L.Galloway C.M.Lyneis Lawrence Berkeley National Laboratory BerkeleyCA 94720-8101USA

The next generation,superconducting ECR ion source venus（Versatile ECR ion source for NUclear Science） has operated with 28GHz since 2004,and has produced world record ion beam intensities. The venus project is focused on two main objectives.First,for the 88-Inch Cyclotron,venus will serve as the third injector source boosting both the energy and intensity of beams available from the facility.Secondly, venus also serves as the prototype injector source for a high intensity heavy ion beam driver linac for a next generation radioactive ion beam facility,where the goal is to produce intense beams of medium to low charge states ions such as 240eμA of Xe20+ or 250eμA of U28+to34+.These high intensity ion beam requirements present a challenge for the beam transport system since the total currents extracted from the ECR ion source reach several mA.Therefore in parallel to ion beam developments,we are also enhancing our ion beam diagnostics devices and are conducting an extensive ion beam simulation effort to improve the understanding of the ion beam transport from the venus ECR ion source.The paper will give an overview of recent experiments with the venus ECR ion source.Since the last ECR ion source workshop in Berkeley in 2004,we have installed a new plasma chamber,which includes X-ray shielding.This enables us to operate the source reliably at high power 28GHz operation.With this new chamber several high intensity beams(such as 2.4mA of O6+,600eμA of O7+,1mA of Ar9+,etc.)have been produced.In addition,we have started the development of high intensity uranium beams.For example,200eμA of U33+ and V34+ have been produced so far.In respect to high charge state ions,leμA of Ar18+,133eμA of Ar16+,and 4.9eμA of U47+ have been measured.In addition,ion beam profile measurements are presented with,and without the sextupole magnetic field energized.These experimental results are being compared with simulations using the

关键词： venus ECR ion source superconducting ECR uranium beams

EUV-dependence of venusian dayside ionopause altitude:VEX and PVO observations

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Earth and Planetary Physics 2020年第1期4卷 73-81页

作者： QianQian Han Markus Fraenz Yong Wei Eduard Dubinin Jun Cui LiHui Chai ZhaoJin Rong WeiXing Wan Yoshifumi Futaana Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Beijing National Observatory of Space Environment Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100049China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China Max-Planck-Institute for Solar System Research GoettingenDE 37077Germany Institutions of Earth Science Chinese Academy of SciencesBeijing 100029China School of Atmospheric Sciences Sun Yat-Sen UniversityZhuhai Guangdong 519082China Key Laboratory of Lunar and Deep Space Exploration National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100012China Swedish Institute of Space Physics KirunaSE 98128Sweden

The venusian dayside ionosphere, similar to other planetary ionospheres, is produced primarily by ionization of its neutral upper atmosphere due to solar extreme ultraviolet (EUV) radiation. It has become clear that the expansion of the ionosphere may be strongly controlled by the EUV level, as exhibited in data collected by the Pioneer venus Orbiter (PVO) during one solar cycle (1978 1992). However, the EUV-dependence of the venusian dayside ionopause altitude, which defines the outer boundary of the ionosphere, remains obscure because the PVO crossed the dayside ionopause only during the solar maximum;its periapsis lifted too high during the solar minimum. Recently, during the period 2006 2014, which included the longest and quietest solar minimum of the past several decades, venus Express (VEX) provided measurements of the photoelectron boundary (PEB) over the northern high-latitude region. Since the photoelectron boundary is closely related to the ionopause, we have an opportunity to analyze the EUV effect on the dayside ionopause by combining PVO and VEX observations. We have evaluated and then reduced the orbit bias effect in data from both PVO and VEX, and then used the results to derive a relationship between solar EUV level and the dayside ionopause altitude. We find that the dayside ionopause altitude increases as the solar EUV level increases, which is consistent with theoretical expectations.

关键词： venus ionopause ionosphere solar activity

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LG venus

数码 2008年第1期 90-91页

希腊神话中的维纳斯，是大多数男人心目中期待的那个美丽女神，也是大多数女人梦想成为的完美化身，而当LG在2008年初始推出这款以venus命名的手机时，就已经注定了它将集大众宠爱于一身的命运。

关键词： LG venus 手机触摸屏双屏互动设计音乐播放功能拍照功能