利用对数的可加性，如果某股从t1 到t2以及t2到t3的log return分别为r1和r2, 那么从t1到t3的log return为r1+r2. 这个非常自然且方便的规则，对于simple relative return却是不成立的，比如初始投资1元，第1年和第2年的年化回报率分别为5%，那么这两年总共的回报率并非5%，而是10.25%。反之，假如第1年涨5%...
else{dk=(double)k;returndk*ln2_hi+dk*ln2_lo;}R=f*f*(0.5-0.33333333333333333*f);if(k=...
+ return frotz(nitfol, two->ptr, 1, 0); ... - hit = frotz(nitfol, mf2.ptr, 1, 0); While git log -G"frotz\(nitfol" will show this commit, git log -S"frotz\(nitfol" --pickaxe-regex will not (because the number of occurrences of that string did not change). Unless --...
Service有两种，前台服务超时为SERVICE_TIMEOUT=20S 后台服务超时为SERVICE_BACKGROUD_TIMEOUT=200S 根据变量ProcessRecord.execServicesFg来决定是前台服务还是后台服务 Service TimeOut是位于“ActivityManager”线程中的AMS.MainHandler收到SERVICE_TIMEOUT_MSG消息时触发。
return(Res) } ham_Res spam_Res VOCBLIST ###VOCBLIST是所有文件中的单词并集##编写将文件处理成向量的函数,其中只计数1次,初始化计数为0,##防止计算概率乘积时概率为0 doc2Vector VoccabVector if(doc_type == "ham"){ for(word in ham_Res$VocabList_List[[filename]]){ if(word %in% ham_Res...
# sysnameRouterA # info-center source IP channel 6 log level warning info-center logfile channel 6 # interfaceGigabitEthernet1/0/0 ip address 10.2.1.1 255.255.0.0 # ip route-static 10.1.0.0 255.255.0.0 10.2.1.2 # return 翻译 收藏
given time period. The algorithm to determine this is simple: get all the status codes from the log file, group them by the value of the returned code, count the number of items in each group, and sort them in descending order by the number of items. The actual query looks like this...
configuration ssh # ssh server compatible-ssh1x enable stelnet server enable ssh user client001 ssh user client001 authentication-type rsa ssh user client001 assign rsa-key abc1 ssh user client001 service-type stelnet ssh authorization-type default aaa # ssh client first-time enable # return ...
Building a custom solution using LRS to migrate databases to the cloud requires several orchestration steps shown in the diagram and outlined in the table below. \n \n The migration consists of making full database backups on SQL Server with CHECKSUM enabled, and copying ...
r = some_function() if r == -1: return -1 return r def bar(): r = foo() if r == -1: print('Error') else: pass 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 一旦出错,还要一级一级上报,直到某个函数可以处理该错误(比如,给用户输出一个错误信息)。