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3 mar lunar eclipse calculations uding skyfield

  Wechat   from skyfield import eclipselib from skyfield.api import load, wgs84 from numpy import pi from zoneinfo import ZoneInfo bjt = ZoneInfo("Asia/Shanghai") ts = load.timescale() eph = load("de422.bsp") moon = eph["moon"] earth = eph["earth"] r2d = 180./pi beijing = earth + wgs84.latlon(39.9042, 116.4074, 44) lunar = ['半影月食','月偏食','月全食'] t0 = ts.utc(2026, 1, 1) t1 = ts.utc(2027, 1, 1) t, y, details = eclipselib.lunar_eclipses(t0, t1, eph) idx = 0 for ti, yi in zip(t, y):     print(         ti.astimezone(bjt).strftime("%Y-%m-%d %H:%M:%S"),         f"{lunar[yi]}"              )     print(f"\t日月最近夹角:\t{details['closest_approach_radians'][idx]*r2d:.2f}°")     print(f"\t月球半径:\t{details['moon_radius_radians'][idx]*r2d:.2f}°")         print(f"\t半影半径:\t{details['penumbra_radius_radians'][idx]*r2d:.2f}°")        print(f"\t本影半径:\t{de...
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Sake清酒的 酒度 酸度

清酒的含量是用比重計( hydrometer 酒度計應可以量度 )測定的。 簡單地說,在水為±0的情況下,如果含糖量高,就會比水重,比重計就會向負值傾斜,如果含糖量低,即是比水輕,比重計就會向正值傾斜。 日本酒度S.G. 指的是「15℃ 的日本酒, 跟 4℃跟水比較,密度是高還是低」,詳細的定義是「日本酒度 =(1443/比重)-1443」 Nihonshu-do from homebrewsake 因此,負值為甜,正值為辛。 一般認為,清酒含量低的清酒口感偏甜, 清酒含量高的清酒口感偏辛 但由於清酒的口感並不是單單由清酒含量決定的,所以最好以此為粗略指導。 清酒度數在-1.4~+1.4為正常,清酒度數在+6以上為大辛口,+10以上為超辛口,-6以下為大甘口,-10以下為超甘口。 日本酒整體的平均酸度在1.14~1.44之間,據此,酸度越高,口感越豐富、越深,酸度越低,口感越淡。  甘度和辛度來看,酸度高的清酒容易讓人覺得辛口,酸度低的清酒則容易讓人覺得甘口。 一般來說,酸度高的酒更容易被認為是辛型酒,而酸度低的酒更容易被認為是甘型酒。 Reference  1shot Sakenowa Sakenomy  大多數清酒有 酒度,酸度,及評價

ATMer Oganes Markaryan

 From Russia Honeycomb main mirror  625mm f3.67

Ralph Giles ,ghostscript core ghostscript developer, passed away

12 Feb 2026 Twitter Wizards of OS GitHub  

C16 phase high entropy boride with high magnetic anisotropy

  Wiley  advanced materials  By transformation of ball-milled powder mix of HfO2, MoO3, Nb2O5, Ta2O5, ZrO2, carbon black, and boron carbide under high-pressure and high-temperature during the formation of high-entropy boride (Hf0.2Mo0.2Nb0.2Ta0.2Zr0.2)B2. The synthesis process started at 1100 °C and a fully dense crystalline material was obtained after annealing at 2000 °C. The synthesized material was powdered and mixed with platinum and loaded in a diamond anvil cell and studied to ultrahigh pressure of 220 GPa. The hexagonal AlB2-type phase of (Hf0.2Mo0.2Nb0.2Ta0.2Zr0.2)B2 was found to be stable up to 30% compression in volume and the variation of axial (c/a) ratio shows a slight anisotropic compression with c-axis being more compressible than the a-axis above 62 GPa. The third order Birch-Murnaghan equation of state fit to the high-pressure data up to 220 GPa results in an ambient pressure volume 𝑉0=28.16 ±0.039 Å3, bulk modulus  𝐾𝑜 = 407 ± 6 GPa, pressure der...

GIAC aka XCAS

Main developer: Bernard Parisse Core engine: GIAC, a CAS (computer algebric system) in C++ Twitter: xialulee YouTube  tutorial  Grenoble presentation   Run it offline in your browser   Run it online  in your browser  GUI frontend:QGiac Github   , aka XCAS Who is using it? HP Prime Sagemath GeoGebra, flathub , Google play store FriCAS github , SandBox