使用Python 进行多种策略的投资组合管理

#MaximumSharpeRatioPortfoliodefmaximum_sharpe_ratio_portfolio(returns):cov_matrix=returns.cov()inv_cov_matrix=np.linalg.inv(cov_matrix)ones_vector=np.ones(len(returns.columns))weights=inv_cov_matrix.dot(ones_vector)/ones_vector.dot(inv_cov_matrix).dot(ones_vector)...

2024·中体产业·城市俱乐部国际帆船赛 竞赛通知(草案)

Thetablebelowspecifiestheminimumandmaximumnumberoftheteammemberthatshallbeonboardduringracingforeachclass:7[NP]ADVERTISING7.1WorldSailingAdvertisingCodewillbeapplied.TheOAhastherighttorejecttheteam’sadvertisementsthatconflictwithgovernmentregulationsa...

【船长经验】大堡礁水域航行注意事项|港口|珊瑚礁|reef|torres...

Reducethetrimofyourvesseltoamaximum3.0mforsafetransit,tomaximisetidalwindowsandtominimisethesquateffectduringyourTorresStraittransit.AMSA’scompulsoryUKCMsystemforvesselswithdrafts>9.0mcannotcalculatetidalwindowswherethereismorethan3.0mtrim....

CAM, Grad-CAM, Grad-CAM++可视化CNN方式的代码实现和对比

deep_linearization_weights=np.sum((weights*alphas).reshape((-1,conv_first_grad[0].shape[2])),axis=0)grad_CAM_map=np.sum(deep_linearization_weights*conv_output[0],axis=2)#Grad-CAM++mapcam=np.maximum(grad_CAM_map,0)cam=zoom(cam,H/cam.shape[0])cam=cam/...

CVPR2021目标检测佳作 | Weighted boxes fusion

w=np.maximum(0.0,x22-x11+1)h=np.maximum(0.0,y22-y11+1)intersection=w*h#利用相交的面积和两个框自身的面积计算框的交并比,将交并比大于阈值的框删除ious=intersection/(areas[index]+areas[order[:-1]]-intersection)...

纯电时代也要实用至上,为啥e:NP2极湃2深受家庭用户喜爱?

提到本田在车内空间的塑造,圈内人往往会联想到其深入人心的“MM”(ManMaximum,MachineMinimum)设计理念,即以人为本,最大化乘客空间体验,最小化机械占用空间(www.e993.com)2024年11月3日。到了新能源时代,这一理念在e:NP2极湃2身上得到了淋漓尽致的展现,不仅为用户提供了极为舒适的乘坐体验,同时也为纯电动汽车的空间设计提供了新的思路...

使用卷积神经网络实现图片去摩尔纹

avg_LH_HL_HH=paddle.maximum(temp,pool_x1_HH)inp_merged=paddle.multiply(pool_x1_LL,avg_LH_HL_HH)x2=self._conv2(inp_merged)x2=F.relu(x2)x2=self.pool_2(x2)x2=self.dropout2(x2)x3=self._conv3(x2)...

90个Numpy的有用的代码片段

importnumpyasnp2、打印numpy信息print(np.__version__)np.show_config()3、创建空向量Z=np.zeros(10)print(Z)4、获取numpy函数的文档python-c"importnumpy;numpy(numpy.add)"5、创建大小为10但第5个值为1的空向量...

2023 城市俱乐部国际帆船赛竞赛通知

Thetablebelowspecifiestheminimumandmaximumnumberoftheteammemberthatshallbeonboardduringracingforeachclass:7[NP]ADVERTISING7.1WorldSailingAdvertisingCodewillbeapplied.TheOAhastherighttorejecttheteam’sadvertisementsthatconflictwithgovernmentregulations...

Chrome暗藏的“恐龙跳一跳”,AI玩得比你还溜

random.randrange(ACTIONS)a_t[action_index]=1else:#predicttheoutputq=model.predict(s_t)#inputastackof4images,getthepredictionmax_Q=np.argmax(q)#chosingindexwithmaximumqvalueaction_index=max_Qa_t[action_index]=1#o=>donothing,1=...