Transform Hertinan matrix eigen problem into a real symmetric matrix eigen problem: principle: Compare with the results of matlab: A=[… ( 3.0 + 0.0*j) (-2.0 -2.0*j) (-0.9 -0.9*j) (-0.5 -0.5*j); … (-2.0 + 2.0*j) ( 4.0 + 0.0*j) ( 1.0 + 1.0*j) (-0.7 -0.5*j); … (-0.9 + 0.9*j) ( 1.0 -1.0*j) (-1.0 + 0.0*j) ( […]
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An implementation of the Householder transformation that is synchronous to the Lapack algorithm to tridiagonalize a symmetric matrix
Householder Transformation: Any U(i) is an n-dimensional real vector (or complex vector), P(i) = I – U(i) * U(i)’ / H(i) Where: Hi = (1/2) * Ui’ * Ui Hi = = H(i) etc.; ———————- Transformation matrix: Q = P(n-3)*P(n-2)*…*P(1)*P(0) T = Q * A * Q’ A = inv(Q) * A * inv(Q’) ______________________________________ […]
Use QFile for file operations (QFile can use FILE * pointers, and must also specify AutoCloseHandle)
The QFile class provides common functions for manipulating files. It is an io device that can be used to read and write text files and binary files, and can also be used to read and write Qt resource files. The QFile class can be used alone. The class itself provides read/write functions, but it is […]
Document type, document number, gender, date of birth verification (ID card, household registration book, residence permit for Hong Kong and Macao residents, residence permit for Taiwan residents, mainland travel permit for Hong Kong and Macao residents, mainland travel permit for Taiwan residents, overseas permanent residence permit, permanent residence permit for foreigners ID card, passport, others)
Validation tool class import com.xx.xx.dic.CertificateType; /** * Document type verification tools */ public class CertificateValidateUtil {<!– –> public static String validate(String xm, String xb, String zjlx, String zjhm, String csrq) {<!– –> //1. Verify based on the document number encoding rules //1.1 If the document number conforms to the ID card coding rules, verify the […]
Data Mining-User Behavior Analysis and Event Recognition of Household Water Heater
Explore and analyze the water flow status of the water heater import pandas as pd import matplotlib.pyplot as plt inputfile = ‘D:/laizheli111/python_shuju/original_data.xls’ # input data file data = pd.read_excel(inputfile) # read the total data lv_non = pd.value_counts(data[‘with or without water flow’])[‘no’] lv_move = pd.value_counts(data[‘Whether there is water flow’])[‘Yes’] fig=plt.figure(figsize=(6,5)) plt.rcParams[‘font.sans-serif’] = ‘SimHei’ plt.rcParams[‘axes.unicode_minus’] = False […]
Python data analysis and mining practice (household water heater user behavior analysis and event recognition)
1. Introduction In the process of using household water heaters, residents will form different usage habits due to regional climate, different regions, and user age and gender differences. If home furnishing companies can deeply understand the usage habits of their products in different user groups, and develop functions that meet customer needs and habits, they […]
[Solved] Hbase reports an error when using the shell command: PleaseHoldException: Master is initializing Solution
1. Error content hbase(main):001:0> list TABLE ERROR: org.apache.hadoop.hbase.PleaseHoldException: Master is initializing at org.apache.hadoop.hbase.master.HMaster.checkInitialized(HMaster.java:2452) at org.apache.hadoop.hbase.master.MasterRpcServices.getTableNames(MasterRpcServices.java:915) at org.apache.hadoop.hbase.protobuf.generated.MasterProtos$MasterService$2.callBlockingMethod(MasterProtos.java:58517) at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2339) at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:123) at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:188) at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:168) For usage try ‘help “list”‘ Took 10.297 seconds </code><img class=”look-more-preCode contentImg-no-view” src=”https://i.syntaxbug.com/img/d663e14cd5_0.png” alt=”” title=””></code> pre> <h3>Second, the solution</h3> <h6>0, ensure that hbase is running</h6> <h6>1. Delete the hbase folder in […]