/// <summary>
/// 傳入一個句子，將句子編碼為張量後透過onnx推估其意圖，並且產出機率前3高的結果
/// </summary>
/// <param name="sentence"></param>
/// <returns></returns>
public static List <PredictIntent> Sentence2Intent(string sentence)
{
//將句子轉成onnx張量容器(最大長度128個字，每個字對應成長度為256的特徵向量)
var container = TensorHelper.StringToEmbeddedTensor(sentence);
//產生推論結果
var results = np.array(luis_session.Run(container).ToList()[0].AsEnumerable <float>().ToArray());
//將推論結果由大至小排序(argsort是由小至大，然後"::-1"是反轉)取前三名
var top_results = np.argsort <float>(results);
//根據索引串回intent(透過index2intent)以及對應機率
List <PredictIntent> final_result = new List <PredictIntent>();
for (int i = -1; i > -4; i--)
{
int idx = top_results.GetData(new int[] { i });
float probs = results.GetData(new int[] { idx });
//top1機率過低判斷為意圖清單之外
if (i == -1 && probs < 0.6)
{
final_result.Add(new PredictIntent()
{
Intent = (intent)(-1), Ordinal = -i, Probability = 1.2f - probs
});
}
final_result.Add(new PredictIntent()
{
Intent = (intent)idx, Ordinal = -i, Probability = probs
});
}
return(final_result);
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
else
{
app.UseExceptionHandler("/Home/Error");
// The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
app.UseHsts();
}
app.UseHttpsRedirection();
app.UseDefaultFiles();
app.UseStaticFiles();
//app.UseStaticFiles(new StaticFileOptions
//{
// FileProvider = new PhysicalFileProvider(
// Path.Combine(Directory.GetCurrentDirectory(), "assets")),
// RequestPath = "/assets"
//});
app.UseRouting();
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllerRoute(
name: "default",
pattern: "{controller=Home}/{action=Index}/{id?}");
});
//初始化相關物件
InferHelper.SettingSession("Models/text_cnn.onnx");
InferHelper.Prepare_mapping(Properties.Resources.intent_list);
TensorHelper.Prepare_Embedding();
TensorHelper.chars_list = Properties.Resources.charlist.ToCharArray();
//天氣能力
string weatherJson = AbilityHelper.HttpGet(AbilityHelper.weather_url);
var weather = Newtonsoft.Json.JsonConvert.DeserializeObject(weatherJson);
Console.Write(weatherJson);
}
