9、ChainedScheduler 10、ConstantLR 三、自定义学习率调整策略 四、参考内容 学习率是深度学习训练中至关重要的参数,很多时候一个合适的学习率才能发挥出模型的较大潜力。学习率的选择是深度学习中一个困扰人们许久的问题,学习率设置过小,极大降低收敛速度,增加训练时间;学习率太大,可能导致参数在最优解两侧来回振荡...
scheduler=lr_scheduler.ChainedScheduler([lr_scheduler.LinearLR(optimizer,start_factor=1,end_factor=0.5,total_iters=10),lr_scheduler.ExponentialLR(optimizer, gamma=0.95)]) 11.ConstantLR ConstantLRConstantLR非常简单,在total_iters轮内将optimizer里面指定的学习率乘以factor,total_iters轮外恢复原学习率。 sc...
scheduler,total_step):'''get lr values'''lrs=[]forstepinrange(total_step):lr_current=optim.param_groups[0]['lr']lrs.append(lr_current)ifschedulerisnotNone:scheduler.step()returnlrs# globalmodel=torch.nn.Sequential(torch.nn.Conv2d(3,4,3))initial_lr=1.total_step=200...
CosineAnnealingWarmRestarts：在每个退火周期内，学习率按余弦规律衰减。ChainedScheduler：多个调度器结果相乘作为新的学习率。ReduceLROnPlateau：当指标不再提升时，根据loss减小学习率。当需要从先前训练恢复时，通过设置last_
ChainedScheduler与SequentialLR相似，但允许连续调整学习率，提供更平滑的调整过程。12. **ConstantLR ConstantLR在固定迭代次数内保持学习率不变，之后恢复初始设置，适用于某些特定训练阶段。13. **ReduceLROnPlateau ReduceLROnPlateau策略通过监控验证集性能调整学习率，依据loss或accuracy变化，通过factor参数...
3、ConstantLR ConstantLR通过乘法因子降低学习率，直到训练达到预定义步数。from torch.optim.lr_scheduler import ConstantLRscheduler = ConstantLR(optimizer, factor = 0.5, # The number we multiply learning rate until the milestone. total_iters = 8) # The number of steps that the scheduler ...
class ConstantLR(_LRScheduler): def __init__(self, optimizer, last_epoch=-1): super(ConstantLR, self).__init__(optimizer, last_epoch) def get_lr(self): return [base_lr for base_lr in self.base_lrs] class PolynomialLR(_LRScheduler): def __init__(self, optimizer, max_iter, powe...
constant_schedule 学习率不变 def get_constant_schedule(optimizer: Optimizer, last_epoch: int = -1): return LambdaLR(optimizer, lambda _: 1, last_epoch=last_epoch) 1. 2. warmup def get_constant_schedule_with_warmup(optimizer: Optimizer, num_warmup_steps: int, last_epoch: int = -1):...
🐛 Bug torch.optim.lr_scheduler.SequentialLR inherits the _LRScheduler class but it doesn't have an optimizer attribute. It might not be a bug, but it does bring inconvenience when users try to access that attribute. For example, when I u...
constant_schedule学习率不变def get_constant_schedule(optimizer: Optimizer, last_epoch: int = -1): return Lambda scheduler 默认值 原创 wx63899b601ff16 2022-12-03 00:00:21 233阅读 linux lr Linux LR指的是Linux操作系统的一个重要发行版之一,即红帽Linux。作为Linux系统的一种版本,红帽Linux具有...