eclipsing binary star/ A9780 Binary and multiple starsFrom photoelectric observations of V 337 Aql a new solution is carried out. Transit at primary eclipse in disagreement with the Wright-Dugan results is found. Both Russell-Merrill and Kitamura methods of light curve solution are used. The ...
A method is proposed for designing refractive optical elements focusing a collimated incident beam into a curve with specified shape. A general relationship for the freeform surface of the optical element is derived as an envelope of a parametric family of hyperboloids of revolution that focuses the...
Until now, only a Sr line identification has been achieved; however, the light-curve decline can be related to integrated decay energy of the involved heavy elements. This has been only a quick survey of direct observational features related to individual nucleosynthesis sites; for a more ...
essential a. 1.必要的,必不可少的 2.本质的,基本的 3.提炼的,精华的 n. 1.要素,要点 2.本质,实质 elements [element]的复数 information n.[U] 1.通知;告知 2.information (on/about sb/sth) (关於某人[某事物]的)情报,消息,资料 3.a mine of information = min non essential adj. 不重要...
Figure 5. Fitting curve model for heavy metal contents of As, Zn and Cd and accuracy evaluation of the predicted results 下载: 全尺寸图片 幻灯片 4. 分析与展望 山水林田湖草等自然资源的质量禀赋关系到国内生态文明建设和美丽中国建设进程,关系到国家生态安全和中华民族永续发展。其中,耕地质量既是各...
Revit.DB.Document familyDocument, SketchPlane sketchPlane) { // create a new ModelCurve in the family document XYZ p0 = new XYZ(1, 1, 0); XYZ p1 = new XYZ(5, 1, 0); Line line1 = Line.CreateBound(p0, p1); ModelCurve modelCurve1 = familyDocument...
Numerous essential metal elements (EMEs) are necessary to maintain the proper function of human body. In this case-control study, we investigated the associations of 11 EMEs [Calcium (Ca), potassium (K), magnesium (Mg), sodium (Na), manganese (Mn), selenium (Se), cobalt (Co), Molybden...
A single line traveling in a curve around a fixed, invisible point with an unchanging distance from that point, eventually joins it’s starting point and becomes circle. A circle is a line until the thickness of the line increases to completely fill the negative space inside the circle. The...
Follow conventions and patterns to reduce the learning curve for users and to make the mobile experience more intuitive. Dedicated apps should follow platform-specific standards and guidelines. A comprehensive collection of links to official UI and UX guidelines is available in the article “UI Guidel...
DNA can determine where and when genes are expressed, but the full set of sequence determinants that control gene expression is unknown. Here, we measured the transcriptional activity of DNA sequences that represent an ~100 times larger sequence space th