[Example] Add an example of predicting forward diastolic deformation of the left ventricular myocardium

[MGWanderer1]

PR types

Others

PR changes

Others

Describe

The code provides a deformation prediction for the left ventricle during the diastolic phase under a linear elastic constitutive model, utilizing 20% of the actual data points for validation to achieve improved accuracy.

[paddle-bot]

Thanks for your contribution!

[lijialin03]

我看了一下现在equation里的公式部分和inverse里的equation一样，就用一份吧，把inverse下的那个equation文件的开头改为：

def __init__(
        self,
        E: Union[float, str, paddle.base.framework.EagerParamBase],
        nu: Union[float, str],
        P: Union[float, str],
        dim: int = 3,
        time: bool = False,
        detach_keys: Optional[Tuple[str, ...]] = None,
    ):
        super().__init__()
        self.detach_keys = detach_keys
        self.dim = dim
        self.time = time

        t, x, y, z = self.create_symbols("t x y z")
        normal_x, normal_y, normal_z = self.create_symbols("normal_x normal_y normal_z")
        invars = (x, y)
        if time:
            invars = (t,) + invars
        if self.dim == 3:
            invars += (z,)

        u = self.create_function("u", invars)
        v = self.create_function("v", invars)
        w = self.create_function("w", invars) if dim == 3 else sp.Number(0)

        if isinstance(nu, str):
            nu = self.create_function(nu, invars)
        if isinstance(P, str):
            P = self.create_function(P, invars)
        if isinstance(E, str):
            E = self.create_function(E, invars)
            self.E = E
        elif isinstance(E, paddle.base.framework.EagerParamBase):
            self.E = E
            self.learnable_parameters.append(self.E)
            E = self.create_symbols(self.E.name)

        self.nu = nu
        self.P = P

类名改为

class Hooke(base.PDE):

然后把inverse.py中调用的代码（第37行）改为：

equation = {"Hooke": eq_func.Hooke(E=E, nu=cfg.nu, P=cfg.P, dim=3)}

[lijialin03]

改为./data/label.csv

[lijialin03]

跟反问题统一，改为./data/forward.csv吧

[lijialin03]

跟反问题统一，改为./sta/heart.stl

[lijialin03]

文件名改为forward.yaml

[lijialin03]

删除注释代码

[lijialin03]

同上

[lijialin03]

在最开始增加：

defaults:
  - ppsci_default
  - TRAIN: train_default
  - TRAIN/ema: ema_default
  - TRAIN/swa: swa_default
  - EVAL: eval_default
  - INFER: infer_default
  - hydra/job/config/override_dirname/exclude_keys: exclude_keys_default
  - _self_

[lijialin03]

改为：

solver = ppsci.solver.Solver(
        model,
        constraint,
        optimizer=optimizer,
        equation=equation,
        validator=validator,
        visualizer=visualizer,
        cfg=cfg,
    )

[lijialin03]

改为：

solver = ppsci.solver.Solver(
        model=model,
        validator=validator,
        visualizer=visualizer,
        cfg=cfg,
    )

[lijialin03]

辛苦提交代码～
这个PR中带了不属于这次提交的jointContribution中的代码，可以新开一个本地分支拉一下PaddleScience中develop分支，再改动
不用新建forward_heart目录了，把内容放到现有的example/heart目录下的对应位置即可，在文件名中带forward和inverse来区分文件（文件名相关改动在上面的comments中有）