287 lines
11 KiB
C#
287 lines
11 KiB
C#
/*
|
||
* 版本历史：
|
||
* 1.0.0 (2024-10-13): 初始版本，实现大气透过率模型的基类，包括各种天气条件下的衰减计算。作者：田建勇
|
||
*/
|
||
|
||
using System;
|
||
|
||
namespace AirTransmission
|
||
{
|
||
/// <summary>
|
||
/// 大气透过率模型的抽象基类，提供了各种大气条件下的透过率计算方法
|
||
/// </summary>
|
||
public abstract class TransmittanceModel(WeatherCondition weather)
|
||
{
|
||
// 常量
|
||
/// <summary>
|
||
/// 标准大气透过率
|
||
/// </summary>
|
||
protected const double STANDARD_TRANSMITTANCE = 0.979; // 标准大气透过率
|
||
/// <summary>
|
||
/// 标准能见度（公里）
|
||
/// </summary>
|
||
protected const double STANDARD_VISIBILITY = 23.0; // 标准能见度 (km)
|
||
/// <summary>
|
||
/// 标准气溶胶密度（粒子/立方厘米）
|
||
/// </summary>
|
||
protected const double STANDARD_AEROSOL_DENSITY = 100.0; // 标准气溶胶密度 (particles/cm³)
|
||
|
||
|
||
/// <summary>
|
||
/// 当前天气条件
|
||
/// </summary>
|
||
protected WeatherCondition weatherCondition = weather;
|
||
// 大气模型参数
|
||
/// <summary>
|
||
/// 温度（开尔文）
|
||
/// </summary>
|
||
protected double Temperature { get; set; } = weather.Temperature + 273.15;
|
||
/// <summary>
|
||
/// 大气压力（百帕）
|
||
/// </summary>
|
||
protected double Pressure { get; set; } = 1013.25;
|
||
/// <summary>
|
||
/// 相对湿度（百分比）
|
||
/// </summary>
|
||
protected double Humidity { get; set; } = weather.RelativeHumidity;
|
||
/// <summary>
|
||
/// 气溶胶密度（粒子/立方厘米）
|
||
/// </summary>
|
||
protected double AerosolDensity { get; set; } = CalculateAerosolDensity(weather.Visibility);
|
||
/// <summary>
|
||
/// 能见度（公里）
|
||
/// </summary>
|
||
protected double Visibility { get; set; } = weather.Visibility;
|
||
/// <summary>
|
||
/// 是否下雨
|
||
/// </summary>
|
||
protected bool IsRaining { get; set; } = weather.Type == WeatherType.雨天;
|
||
/// <summary>
|
||
/// 降雨量（毫米/小时）
|
||
/// </summary>
|
||
protected double RainRate { get; set; } = weather.Type == WeatherType.雨天 ? (weather.Precipitation ?? 0) : 0;
|
||
/// <summary>
|
||
/// 是否有雾
|
||
/// </summary>
|
||
protected bool IsFoggy { get; set; } = weather.Type == WeatherType.雾天;
|
||
/// <summary>
|
||
/// 是否有沙尘
|
||
/// </summary>
|
||
protected bool IsDusty { get; set; } = weather.Type == WeatherType.沙尘;
|
||
/// <summary>
|
||
/// 是否下雪
|
||
/// </summary>
|
||
protected bool IsSnowing { get; set; } = weather.Type == WeatherType.雪天;
|
||
/// <summary>
|
||
/// 降雪量（毫米/小时）
|
||
/// </summary>
|
||
protected double SnowRate { get; set; } = weather.Type == WeatherType.雪天 ? (weather.Precipitation ?? 0) : 0;
|
||
/// <summary>
|
||
/// 二氧化碳浓度（ppm）
|
||
/// </summary>
|
||
protected double CO2Concentration { get; set; } = 415; // ppm, 默认值
|
||
|
||
/// <summary>
|
||
/// 计算给定距离的大气透过率
|
||
/// </summary>
|
||
/// <param name="distance">传输距离（米）</param>
|
||
/// <returns>大气透过率（0到1之间的值）</returns>
|
||
public abstract double CalculateTransmittance(double distance);
|
||
|
||
/// <summary>
|
||
/// 根据能见度计算气溶胶密度
|
||
/// </summary>
|
||
/// <param name="visibility">能见度（公里）</param>
|
||
/// <returns>气溶胶密度（粒子/立方厘米）</returns>
|
||
protected static double CalculateAerosolDensity(double visibility)
|
||
{
|
||
// 使用指数关系来计算气溶胶密度
|
||
return STANDARD_AEROSOL_DENSITY * Math.Pow(STANDARD_VISIBILITY / Math.Max(visibility, 0.1), 0.75);
|
||
}
|
||
|
||
/// <summary>
|
||
/// 计算雨对电磁波的衰减系数K
|
||
/// </summary>
|
||
/// <param name="wavelength">波长（微米或毫米）</param>
|
||
/// <returns>雨衰减系数K</returns>
|
||
protected abstract double CalculateRainKCoefficient(double wavelength);
|
||
/// <summary>
|
||
/// 计算雨对电磁波的衰减系数α
|
||
/// </summary>
|
||
/// <param name="wavelength">波长（微米或毫米）</param>
|
||
/// <returns>雨衰减系数α</returns>
|
||
protected abstract double CalculateRainAlphaCoefficient(double wavelength);
|
||
|
||
/// <summary>
|
||
/// 计算雪对电磁波的衰减系数K
|
||
/// </summary>
|
||
/// <param name="wavelength">波长（微米或毫米）</param>
|
||
/// <returns>雪衰减系数K</returns>
|
||
protected abstract double CalculateSnowKCoefficient(double wavelength);
|
||
/// <summary>
|
||
/// 计算雪对电磁波的衰减系数α
|
||
/// </summary>
|
||
/// <param name="wavelength">波长（微米或毫米）</param>
|
||
/// <returns>雪衰减系数α</returns>
|
||
protected abstract double CalculateSnowAlphaCoefficient(double wavelength);
|
||
/// <summary>
|
||
/// 计算雨对电磁波的衰减
|
||
/// </summary>
|
||
/// <param name="pathLength">传输路径长度（米）</param>
|
||
/// <param name="wavelength">波长（微米或毫米）</param>
|
||
/// <returns>雨衰减（dB）</returns>
|
||
protected double CalculateRainAttenuation(double pathLength, double wavelength)
|
||
{
|
||
if (!IsRaining || RainRate <= 0)
|
||
return 0;
|
||
|
||
// 计算 k 和 α 系数
|
||
double k = CalculateRainKCoefficient(wavelength);
|
||
double alpha = CalculateRainAlphaCoefficient(wavelength);
|
||
|
||
// 计算特定衰减（dB/km）
|
||
double specificAttenuation = k * Math.Pow(RainRate, alpha);
|
||
|
||
// 计算总衰减（dB）
|
||
return specificAttenuation * pathLength;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 计算雪对电磁波的衰减
|
||
/// </summary>
|
||
/// <param name="pathLength">传输路径长度（米）</param>
|
||
/// <param name="wavelength">波长（微米或毫米）</param>
|
||
/// <returns>雪衰减（dB）</returns>
|
||
protected double CalculateSnowAttenuation(double pathLength, double wavelength)
|
||
{
|
||
if (!IsSnowing || SnowRate <= 0)
|
||
return 0;
|
||
|
||
// 雪的衰减系数（这里使用一个简化模型，实际上可能需要更复杂的计算）
|
||
double k = CalculateSnowKCoefficient(wavelength);
|
||
double alpha = CalculateSnowAlphaCoefficient(wavelength);
|
||
|
||
// 计算特定衰减（dB/km）
|
||
double specificAttenuation = k * Math.Pow(SnowRate, alpha);
|
||
|
||
// 计算总衰减（dB）
|
||
return specificAttenuation * pathLength;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 计算沙尘对电磁波的衰减
|
||
/// </summary>
|
||
/// <param name="pathLength">传输路径长度（米）</param>
|
||
/// <returns>沙尘衰减（dB）</returns>
|
||
protected double CalculateDustAttenuation(double pathLength)
|
||
{
|
||
if (!IsDusty)
|
||
return 0;
|
||
|
||
// 沙尘天气衰减计算
|
||
double dustFactor = 1.5; // 沙尘对衰减的额外影响因子
|
||
double beta = (3.91 / Visibility) * dustFactor;
|
||
return beta * pathLength;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 计算能见度因子
|
||
/// </summary>
|
||
/// <returns>能见度因子</returns>
|
||
protected double CalculateVisibilityFactor()
|
||
{
|
||
// 调整能见度因子计算，减小低能见度的影响
|
||
double factor;
|
||
if (Visibility >= STANDARD_VISIBILITY)
|
||
factor = 1;
|
||
else if (Visibility > 5)
|
||
factor = Math.Pow(STANDARD_VISIBILITY / Visibility, 0.2);
|
||
else
|
||
factor = Math.Pow(STANDARD_VISIBILITY / Visibility, 0.3);
|
||
|
||
if (IsDusty)
|
||
{
|
||
// 沙尘天气下，进一步降低能见度因子
|
||
factor *= 0.9;
|
||
}
|
||
|
||
return factor;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 计算烟幕对电磁波的透过率
|
||
/// </summary>
|
||
/// <param name="smokeConcentration">烟幕浓度（g/m³）</param>
|
||
/// <param name="smokeThickness">烟幕厚度（米）</param>
|
||
/// <returns>烟幕透过率（0到1之间的值）</returns>
|
||
public static double CalculateSmokeScreenTransmittance(double smokeConcentration, double smokeThickness)
|
||
{
|
||
if (smokeConcentration <= 0 || smokeThickness <= 0)
|
||
return 1; // 如果没有烟幕，返回1（无衰减）
|
||
|
||
// 烟幕衰减系数（假设值，需要根据实际烟幕特性调整）
|
||
double smokeAttenuationCoefficient = 0.5;
|
||
|
||
// 使用Beer-Lambert定律计算透过率
|
||
double transmittance = Math.Exp(-smokeAttenuationCoefficient * smokeConcentration * smokeThickness);
|
||
|
||
Console.WriteLine($"烟幕透过率计算:");
|
||
Console.WriteLine($"烟幕浓度: {smokeConcentration:F2} g/m³");
|
||
Console.WriteLine($"烟幕厚度: {smokeThickness:F2} m");
|
||
Console.WriteLine($"烟幕透过率: {transmittance:F4}");
|
||
|
||
return transmittance;
|
||
}
|
||
|
||
/// <summary>
|
||
/// 打印天气信息
|
||
/// </summary>
|
||
/// <param name="weather">天气条件</param>
|
||
public static void PrintWeatherInfo(WeatherCondition weather){
|
||
Console.WriteLine($"---天气类型: {weather.Type}, 温度: {weather.Temperature}°C, 相对湿度: {weather.RelativeHumidity}%, 能见度: {weather.Visibility}km, 降水量: {weather.Precipitation ?? 0}mm/h");
|
||
}
|
||
}
|
||
|
||
/// <summary>
|
||
/// 天气类型枚举
|
||
/// </summary>
|
||
public enum WeatherType
|
||
{
|
||
晴天,
|
||
雨天,
|
||
雪天,
|
||
雾天,
|
||
沙尘
|
||
}
|
||
|
||
/// <summary>
|
||
/// 天气条件类
|
||
/// </summary>
|
||
public class WeatherCondition(WeatherType type, double temperature, double relativeHumidity, double visibility, double? precipitation = null, double co2Concentration = 415)
|
||
{
|
||
/// <summary>
|
||
/// 天气类型
|
||
/// </summary>
|
||
public WeatherType Type { get; set; } = type; // 天气类型
|
||
/// <summary>
|
||
/// 温度（摄氏度）
|
||
/// </summary>
|
||
public double Temperature { get; set; } = temperature; // 温度
|
||
/// <summary>
|
||
/// 相对湿度（百分比）
|
||
/// </summary>
|
||
public double RelativeHumidity { get; set; } = relativeHumidity; // 相对湿度
|
||
/// <summary>
|
||
/// 能见度（公里）
|
||
/// </summary>
|
||
public double Visibility { get; set; } = visibility; // 能见度
|
||
/// <summary>
|
||
/// 降水量（毫米/小时）
|
||
/// </summary>
|
||
public double? Precipitation { get; set; } = precipitation; // 降水量
|
||
/// <summary>
|
||
/// 二氧化碳浓度（ppm）
|
||
/// </summary>
|
||
public double CO2Concentration { get; set; } = co2Concentration;
|
||
}
|
||
} |