public static void main(String[] args) throws Exception {
bw = new PrintWriter(new OutputStreamWriter(new FileOutputStream(outputPath,true), "utf8"));
JointParerTrainer trainer = new JointParerTrainer(model);
int maxite = 50;
float c = 0.01f;
trainer.train(trainfile, maxite, c);
eval();
bw.println("优化");
float thres = 1.0E-5f;