加快科学发展速度

问题描述

我在<!DOCTYPE html> <html lang="en"> <head> <style> body{ padding: 0; margin: 0; } .navigation-bar { width: 100%; height: 53px; / background-color: black; } .logo { display: inline-block; vertical-align: top; height: 50px; margin-left: 30px; margin-top: 2px; } .navigation-bar> a { float:right; display: inline-block; vertical-align: top; margin-right: 25px; height: 60px; color: white; line-height: 70px; font-weight: bolder; font-size: 12px; text-decoration: none; font-family: sans-serif; position: relative; padding: 3px; } .navigation-bar> a:hover:before { content: ""; position: absolute; top: 40px; left: 50%; margin-left: -5px; width: 0px; height: 7px; xxmargin: 0px auto; border-left: 5px solid transparent; border-right: 5px solid transparent; border-bottom: 5px solid #fff; } </style> </head> <body> <nav class="navigation-bar"> <img class="logo" src="C:\Users\sahan\Downloads\logo.png"> <a href="#">Contact</a> <a href="#">Us</a> <a href="#">Work</a> <a href="#">Home</a> </nav> 中遇到最小方差优化问题,但有一个附加约束:

scipy

如果我使用以下命令运行此优化器:

def min_variance_scipy(initial_point: np.array,covariance_matrix: np.array):
    start = time.time()
    n = covariance_matrix.shape[0]
    
    objective_function = lambda w,c: 1000 * w.dot(c).dot(w)
    A = np.array([[1] * n])
    ub = [1]
    lb = [1]
    bounds = Bounds([0] * n,[1] * n)
    diversification_target = {
        'type': 'ineq','fun': lambda weights: (2 / n) - np.sum(weights**2)
    }
    constraints = [LinearConstraint(A,lb,ub),diversification_target]
    
    solution = minimize(fun=objective_function,x0=initial_point,method='trust-constr',bounds=bounds,constraints=constraints,args=(covariance_matrix,),tol=1e-6,jac=lambda x,c: 2000 * x.T.dot(c.T),hess=lambda x,c: 2000 * c.T,options={'gtol': 1e-6})
                        # options={'verbose': 3,'finite_diff_rel_step': 1e-5,})
     
    return solution.x

执行时间为+100段。我想加快性能。我测试了initial_point: np.array of shape == (600,). covariance_matrix: matrix of shape == (600,600) ,但是如果我们使用DCCP优化器,则某些约束不是DCP或DCCP。 (我还有更多要测试的约束条件。)

我还将方法参数更改为cvxpy,但是没有满足SLSQP约束。

解决方法

暂无找到可以解决该程序问题的有效方法,小编努力寻找整理中!

如果你已经找到好的解决方法,欢迎将解决方案带上本链接一起发送给小编。

小编邮箱:dio#foxmail.com (将#修改为@)

相关问答

错误1:Request method ‘DELETE‘ not supported 错误还原:...
错误1:启动docker镜像时报错:Error response from daemon:...
错误1:private field ‘xxx‘ is never assigned 按Alt...
报错如下,通过源不能下载,最后警告pip需升级版本 Requirem...