lookup-tables

问题 How can I do a lookup from a code table in XSLT version 1.0? I tried to do something like this example: https://www.xml.com/pub/a/2002/02/06/key-lookups.html, but I think in that case the data was in the input file and not in the XSLT itself. I created a namespace called "lookup" and tried the following, where my lookup table in the XSLT code itself, but I always get empty values. Do I need to move this to an apply-template structure? <lookup:TenderActionType> <string id='00'>Add</string>

问题 My code requires continuously computing a value from the following function: inline double f (double x) { return ( tanh( 3*(5-x) ) *0.5 + 0.5); } Profiling indicates that this part of the program is where most of the time is spent. Since the program will run for weeks if not months, I would like to optimize this operation and am considering the use of a lookup table. I know that the efficiency of a lookup table depends on the size of the table itself, and on the way it's designed. Currently I

问题 This is a preprocessed DataFrame, with columns representing frequency and success values for specific column. For example: Column A is associated with FREQ_A and SUCCESS_A respectively. A B Gold FREQ_A SUCCESS_A FREQ_B SUCCESS_B 0 1 B 0 1 0.00 1 0.00 1 2 A 1 1 0.01 1 0.01 I have another DataFrame, like the following: A B 0 1 A 1 2 B Now I want to add the associated frequency and success columns ( FREQ_* and SUCCESS_* , * : {A,B} ), looking up the values from the preprocessed DataFrame. An

问题 I am new to entity framework and I am trying to work with some data I have the 3 tables below: Problem is I have found out that many to many relationships aux tables are not abstracted into entity framework. Problem: I currently have users who can create Friends. If they create a friend entity frameworks will supposedly create the necessary entries into Users_Friends. But! What if I have the user fill out a form to create a friend and the friend they created already exists in friends, so

问题 StackExchange, I'm hoping someone here can help me with this issue! I'm working in XSLT 1.0 , trying to embed a lookup table to convert some unformatted data to a standardized, formatted structure. I have read and searched and tried various methods to accomplish this and none of them have been able to generate a result. (Though I'm not getting any errors, either.) Below is a sample of the XSL I'm working with: <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0"

问题 I have a database table with +5M static records in place. Simple structure: (starting int, ending int, result int). So i have an certain INT and i need to find it's corresponding result(int). Currently, the look-up table is in DB, but it needs to reside in-memory, most likely in the environment without a database access. My solution needs to perform this logic without a database access, in memory and super fast as I need to process 1000s of transactions per second. The size of the set is

问题 I am designing morphological operations in OpenCV. I am trying to mimic the functions remove and bridge in Matlab's bwmorph. To do this I referred to the function definition of bwmorph.m, there I obtained the Look up table arrays for remove and bridge. After that step the procedure is same for both Matlab and OpenCV. lut(img,lutarray,img) Problem is that Matlab uses a 512 element (9bit) look up table scheme while OpenCV uses a 256 element (8bit) look up scheme, how do I use the Matlab

问题 This is a seemingly simple R question, but I don't see an exact answer here. I have a data frame (alldata) that looks like this: Case zip market 1 44485 0 2 44481 0 3 43210 0 There are over 3.5 million records. Then, I have a second data frame, 'zipcodes'. market zip 1 44485 1 44486 1 44488 ... ... (100 zips in market 1) 2 43210 2 43211 ... ... (100 zips in market 2, etc.) I want to return the correct value for alldata$market for each case based on alldata$zip matching the appropriate value

问题 I am sampling a sine wave at 48 kHz, the frequency range of my sine wave can vary from 0 to 20000 Hz with a step of about 100 Hz. I am using a lookup table approach. So I generate 4096 samples for a sine wave for 4096 different phases. I think the general idea behind this to increment the step size and use different step sizes for different frequncy. So I do the following (pseudo code). But I am not sure how the step size is going to be related to the frequency I want to generate the samples

问题 here i have a question on LUTs in android. my question is, i have 4X4 LUTs, Using these LUTs apply filter effect for bitmap image in android. Below is my sample LUT file link. Lut link sample Is it Possible in android? if possible please help me how to apply. Thanks in advance. 回答1: I'm working on a LUT applier library which eases the use of LUT images in Android. It uses the algorythm below, but I'd like to enhance it in the future for optimising memory usage. Now it also guesses the color