بررسی فریمورک وب ABP
- A bug is fixed in loop unroller which might lead to wrong condition codes being generated in the unrolled loop.
- Fixed a bug that caused ServiceHub.Host.CLR.x64 to stop working.
- Fixes issue in Chinese version of compiler errors C4533 and C2362 which resulted in incorrect order of string substitution for those languages.
- Improved stability of the Diagnostic Tools and Performance Profiler.
- Code generation problem causing crash with pure virtual destructor in const object
- Fixed a constant evaluation regression from 16.5 Preview 2
- Fixed an issue where MacOS couldn't be paired.
- Fixed an issue where the Diagnostic Tools while debugging and Performance Profiler fail to launch on XBox devices.
نام علمی لحظهی سال تحویل، Vernal Equinox است. Equinox به معنای نقطهای است که یک فصل، به فصلی دیگر تبدیل میشود:
Equinox واژهای است لاتین به معنای «شبهای مساوی» و به این نکته اشاره دارد که در Equinox، طول شب و روز یکی میشوند. هر سال دارای دو Equinox است: vernal equinox و autumnal equinox (بهاری و پائیزی). البته باید درنظر داشت که Equinox بهاری در نیم کرهی شمالی بیشتر معنا پیدا میکند؛ زیرا در نیم کرهی جنوبی در همین زمان، پائیز شروع میشود.
بنابراین میتوان enum زیر را برای تعریف این چهار ثابت رخدادهای خورشیدی تعریف کرد:
public enum SunEvent { /// <summary> /// march equinox /// </summary> VernalEquinox, /// <summary> /// june solstice /// </summary> SummerSolstice, /// <summary> /// september equinox /// </summary> AutumnalEquinox, /// <summary> /// december solstice /// </summary> WinterSolstice }
در ادامه برای محاسبهی زمان equinox از فصل 27 کتاب Astronomical Algorithms کمک گرفته شده و تمام اعداد و ارقام و جداولی را که ملاحظه میکنید از این کتاب استخراج شدهاند.
/// <summary> /// Based on Jean Meeus book _Astronomical Algorithms_ /// </summary> public static class EquinoxCalculator { /// <summary> /// Degrees to Radians conversion factor. /// </summary> public static readonly double Deg2Radian = Math.PI / 180.0; public static bool ApproxEquals(double d1, double d2) { const double epsilon = 2.2204460492503131E-16; if (d1 == d2) return true; var tolerance = ((Math.Abs(d1) + Math.Abs(d2)) + 10.0) * epsilon; var difference = d1 - d2; return (-tolerance < difference && tolerance > difference); } /// <summary> /// Calculates time of the Equinox and Solstice. /// </summary> /// <param name="year">Year to calculate for.</param> /// <param name="sunEvent">Event to calculate.</param> /// <returns>Date and time event occurs as a fractional Julian Day.</returns> public static DateTime GetSunEventUtc(this int year, SunEvent sunEvent) { double y; double julianEphemerisDay; if (year >= 1000) { y = (Math.Floor((double)year) - 2000) / 1000; switch (sunEvent) { case SunEvent.VernalEquinox: julianEphemerisDay = 2451623.80984 + 365242.37404 * y + 0.05169 * (y * y) - 0.00411 * (y * y * y) - 0.00057 * (y * y * y * y); break; case SunEvent.SummerSolstice: julianEphemerisDay = 2451716.56767 + 365241.62603 * y + 0.00325 * (y * y) - 0.00888 * (y * y * y) - 0.00030 * (y * y * y * y); break; case SunEvent.AutumnalEquinox: julianEphemerisDay = 2451810.21715 + 365242.01767 * y + 0.11575 * (y * y) - 0.00337 * (y * y * y) - 0.00078 * (y * y * y * y); break; case SunEvent.WinterSolstice: julianEphemerisDay = 2451900.05952 + 365242.74049 * y + 0.06223 * (y * y) - 0.00823 * (y * y * y) - 0.00032 * (y * y * y * y); break; default: throw new NotSupportedException(); } } else { y = Math.Floor((double)year) / 1000; switch (sunEvent) { case SunEvent.VernalEquinox: julianEphemerisDay = 1721139.29189 + 365242.13740 * y + 0.06134 * (y * y) - 0.00111 * (y * y * y) - 0.00071 * (y * y * y * y); break; case SunEvent.SummerSolstice: julianEphemerisDay = 1721233.25401 + 365241.72562 * y + 0.05323 * (y * y) - 0.00907 * (y * y * y) - 0.00025 * (y * y * y * y); break; case SunEvent.AutumnalEquinox: julianEphemerisDay = 1721325.70455 + 365242.49558 * y + 0.11677 * (y * y) - 0.00297 * (y * y * y) - 0.00074 * (y * y * y * y); break; case SunEvent.WinterSolstice: julianEphemerisDay = 1721414.39987 + 365242.88257 * y + 0.00769 * (y * y) - 0.00933 * (y * y * y) - 0.00006 * (y * y * y * y); break; default: throw new NotSupportedException(); } } var julianCenturies = (julianEphemerisDay - 2451545.0) / 36525; var w = 35999.373 * julianCenturies - 2.47; var lambda = 1 + 0.0334 * Math.Cos(w * Deg2Radian) + 0.0007 * Math.Cos(2 * w * Deg2Radian); var sumOfPeriodicTerms = getSumOfPeriodicTerms(julianCenturies); return JulianToUtcDate(julianEphemerisDay + (0.00001 * sumOfPeriodicTerms / lambda)); } /// <summary> /// Converts a fractional Julian Day to a .NET DateTime. /// </summary> /// <param name="julianDay">Fractional Julian Day to convert.</param> /// <returns>Date and Time in .NET DateTime format.</returns> public static DateTime JulianToUtcDate(double julianDay) { double a; int month, year; var j = julianDay + 0.5; var z = Math.Floor(j); var f = j - z; if (z >= 2299161) { var alpha = Math.Floor((z - 1867216.25) / 36524.25); a = z + 1 + alpha - Math.Floor(alpha / 4); } else a = z; var b = a + 1524; var c = Math.Floor((b - 122.1) / 365.25); var d = Math.Floor(365.25 * c); var e = Math.Floor((b - d) / 30.6001); var day = b - d - Math.Floor(30.6001 * e) + f; if (e < 14) month = (int)(e - 1.0); else if (ApproxEquals(e, 14) || ApproxEquals(e, 15)) month = (int)(e - 13.0); else throw new NotSupportedException("Illegal month calculated."); if (month > 2) year = (int)(c - 4716.0); else if (month == 1 || month == 2) year = (int)(c - 4715.0); else throw new NotSupportedException("Illegal year calculated."); var span = TimeSpan.FromDays(day); return new DateTime(year, month, (int)day, span.Hours, span.Minutes, span.Seconds, span.Milliseconds, new GregorianCalendar(), DateTimeKind.Utc); } /// <summary> /// These values are from Table 27.C /// </summary> private static double getSumOfPeriodicTerms(double julianCenturies) { return 485 * Math.Cos(Deg2Radian * 324.96 + Deg2Radian * (1934.136 * julianCenturies)) + 203 * Math.Cos(Deg2Radian * 337.23 + Deg2Radian * (32964.467 * julianCenturies)) + 199 * Math.Cos(Deg2Radian * 342.08 + Deg2Radian * (20.186 * julianCenturies)) + 182 * Math.Cos(Deg2Radian * 27.85 + Deg2Radian * (445267.112 * julianCenturies)) + 156 * Math.Cos(Deg2Radian * 73.14 + Deg2Radian * (45036.886 * julianCenturies)) + 136 * Math.Cos(Deg2Radian * 171.52 + Deg2Radian * (22518.443 * julianCenturies)) + 77 * Math.Cos(Deg2Radian * 222.54 + Deg2Radian * (65928.934 * julianCenturies)) + 74 * Math.Cos(Deg2Radian * 296.72 + Deg2Radian * (3034.906 * julianCenturies)) + 70 * Math.Cos(Deg2Radian * 243.58 + Deg2Radian * (9037.513 * julianCenturies)) + 58 * Math.Cos(Deg2Radian * 119.81 + Deg2Radian * (33718.147 * julianCenturies)) + 52 * Math.Cos(Deg2Radian * 297.17 + Deg2Radian * (150.678 * julianCenturies)) + 50 * Math.Cos(Deg2Radian * 21.02 + Deg2Radian * (2281.226 * julianCenturies)) + 45 * Math.Cos(Deg2Radian * 247.54 + Deg2Radian * (29929.562 * julianCenturies)) + 44 * Math.Cos(Deg2Radian * 325.15 + Deg2Radian * (31555.956 * julianCenturies)) + 29 * Math.Cos(Deg2Radian * 60.93 + Deg2Radian * (4443.417 * julianCenturies)) + 28 * Math.Cos(Deg2Radian * 155.12 + Deg2Radian * (67555.328 * julianCenturies)) + 17 * Math.Cos(Deg2Radian * 288.79 + Deg2Radian * (4562.452 * julianCenturies)) + 16 * Math.Cos(Deg2Radian * 198.04 + Deg2Radian * (62894.029 * julianCenturies)) + 14 * Math.Cos(Deg2Radian * 199.76 + Deg2Radian * (31436.921 * julianCenturies)) + 12 * Math.Cos(Deg2Radian * 95.39 + Deg2Radian * (14577.848 * julianCenturies)) + 12 * Math.Cos(Deg2Radian * 287.11 + Deg2Radian * (31931.756 * julianCenturies)) + 12 * Math.Cos(Deg2Radian * 320.81 + Deg2Radian * (34777.259 * julianCenturies)) + 9 * Math.Cos(Deg2Radian * 227.73 + Deg2Radian * (1222.114 * julianCenturies)) + 8 * Math.Cos(Deg2Radian * 15.45 + Deg2Radian * (16859.074 * julianCenturies)); } }
خروجی این الگوریتم را برای سالهای 2014 تا 2022 به صورت ذیل مشاهده میکنید:
2014 -> 1392/12/29 20:28:08 2015 -> 1394/01/01 02:16:29 2016 -> 1395/01/01 08:01:21 2017 -> 1395/12/30 14:00:00 2018 -> 1396/12/29 19:46:10 2019 -> 1398/01/01 01:29:29 2020 -> 1399/01/01 07:21:03 2021 -> 1399/12/30 13:08:41 2022 -> 1400/12/29 19:04:37
کدهای کامل این پروژه را از اینجا میتوانید دریافت کنید
Equinox.zip
محصول ، مدیریت محصول و مدیریت پروژه
There a misinformed notions floating around the agile community that products and better than projects. That some how - unspecified and unsubstantiated as usual - that projects are undesirable and focusing on products and their value - again unspecified how to measure that value and unsubstantiated that value measurement isn't what projects do as well.
The fourth preview of Entity Framework Core (EF Core) 8 is available on NuGet today!
Basic information
EF Core 8, or just EF8, is the successor to EF Core 7, and is scheduled for release in November 2023, at the same time as .NET 8.
EF8 previews currently target .NET 6, and can therefore be used with either .NET 6 (LTS) or .NET 7. This will likely be updated to .NET 8 as we near release.
EF8 will align with .NET 8 as a long-term support (LTS) release. See the .NET support policy for more information.