SPARQL query language for RDF
Contents
* 1. Invalid duction* 2. Making simple queries* 3. RDF term constraints* 4. SPARQL syntax (syntax)O 4.1 IRIS (URIs)O 4.2 syntax for literalsO 4.3 query the syntax of a VariableO 4.4 blank node syntaxO 4.5 triples model syntaxO 4.6-Object ListO 4.7 Object ListO 4.8 compound listO 4.9 RDF setO 4.10 when the RDF: type is a predicate, it can be replaced by.* 5. Graph patte
OK, I had a problem here when converting bio2rdf.org irefindex data to nanopublication using SPARQL here:In a database, if the item is looking for have multiple types, but you have only need one of those types in your converted Data, what are can do-is-use-a SPARQL filter function with regex1. The proper SPARQL filter syntax is as follows:Selectwhere{ ? s? P O.
In the case of RDF data query or description, SPARQL whether from birth, standard or operating habits are a good choice, but for a beginner more or less "taboo" means, operation is a bit timid, so just use this time to summarize and learn language, The language features are one by one cracked. Simple query 1, general formula (basic key) select? o where{s p? o} Break: Class SQL is the choice of mapping, and SPARQL
I was trying to insert new data while the WHERE clauses has an "optional" clause. I thought I also need to use optional of the INSERT clause, but it's not true:PREFIX FOAF:http//Xmlns.com/Foaf/0.1/>PREFIX RDF:http//www.w3.org/1999/ Geneva/ A-Rdf-Syntax-ns#>INSERT{GRAPHhttp//Example/Addresses>{? person Foaf:name? name. Optional {person Foaf:mbox? e-mail} # What I thought, which iswrong. Also you can pay attention to optional Syntax:use {} and no punctuation at the end of the triple. } }WHERE{G
Semantic understanding of Chinese natural language questions in the Knowledge baseObjective: To convert the natural language of Chinese into SPARQL queryBasic methods:Natural language preprocessing: Word segmentation (Ictclas), named entity recognition, syntactic analysis (Standford Parser) get a parse tree1, using the syntactic analysis tree to construct the user's query semantic graph (Query semantic graph is a graph used to describe the entity rela
[Artificial intelligence series] python Quepy library learning, pythonquepy
Article 1
What is Quepy?
Quepy is a Python framework to transform natural language problems in database query language queries. It can easily customize different types of problems for queries in natural languages and databases. Therefore, with very little code, you can build your own system and access your database in natural language.
Quepy currently supports
source information extraction tool that focuses on relational extraction. It is focused on users who need to extract information from large datasets and scientists who want to try out new algorithms.
14.Quepy
Quepy is a Python framework that makes queries in the database query language by altering natural language problems. He can simply be defined as a different type of problem in natural language and database queries. So you can build your own system that enters your database in natural lan
Drawing a learning curve is useful, for example, if you want to check your learning algorithm and run normally. Or you want to improve the performance or effect of the algorithm. Then the learning curve is a good tool. The learning curve can judge a learning algorithm, which
Objective
Machine learning is divided into: supervised learning, unsupervised learning, semi-supervised learning (can also be used Hinton said reinforcement learning) and so on.
Here, the main understanding of supervision and unsupervised
As we all know, when Alphago defeated the world go champion Li Shishi, the whole industry is excited, more and more scholars realize that reinforcement learning is a very exciting in the field of artificial intelligence. Here I will share my intensive learning and learning notes. The basic concept of reinforcement learning
problems. It can be simply defined as different types of problems in natural language and database queries. Therefore, you can build your own system that uses natural language to access your database without coding.
Quepy now supports Sparql and MQL query languages. It is planned to extend to other database query languages.
15. Hebel
Hebel is a library program for deep learning of neural networks in Python
Earlier, we mentioned supervised learning, which corresponds to non-supervised learning in machine learning. The problem with unsupervised learning is that in untagged data, you try to find a hidden structure. Because the examples provided to learners arenot marked, so there is no error or reward signal to evaluate the
[Introduction to machine learning] Li Hongyi Machine Learning notes-9 ("Hello World" of deep learning; exploring deep learning)
PDF
Video
Keras
Example application-handwriting Digit recognition
Step 1:define A set of function
Step 2:goodness of function
Step 3:pick the best function
X_t
by altering natural language problems. He can simply be defined as a different type of problem in natural language and database queries. So you can build your own system that enters your database in natural language without coding. Quepy now provides support for SPARQL and MQL query languages. and plan to extend it to other database query languages. 13.HebelHebel is a library program for deep learning of n
as a different type of problem in natural language and database queries. So, you can build your own one with nature without coding.Language into the system of your database.Quepy now provides support for SPARQL and MQL query languages. and plan to extend it to other database query languages.13.HebelHebel is a library program for deep learning of neural networks in the Python language, using Pycuda for GPU
For the performance of four different algorithms in different size data, it can be seen that with the increase of data volume, the performance of the algorithm tends to be close. That is, no matter how bad the algorithm, the amount of data is very large, the algorithm can perform well.When the amount of data is large, the learning algorithm behaves better:Using a larger set of training (which means that it is impossible to fit), the variance will be l
Deep Learning notes finishing (very good)
Http://www.sigvc.org/bbs/thread-2187-1-3.html
Affirmation: This article is not the author original, reproduced from: http://www.sigvc.org/bbs/thread-2187-1-3.html
4.2, the primary (shallow layer) feature representation
Since the pixel-level feature indicates that the method has no effect, then what kind of representation is useful.
Around 1995, Bruno Olshausen and David Field two scholars, Cornell Unive
In machine learning, supervised learning (supervised learning) by defining a model and estimating the optimal parameters based on the data on the training set. The gradient descent method (Gradient descent) is a parametric optimization algorithm widely used to minimize model errors. The gradient descent method uses multiple iterations and minimizes the cost funct
Transferred from: http://blog.csdn.net/zouxy09/article/details/8775518
Well, to this step, finally can talk to deep learning. Above we talk about why there are deep learning (let the machine automatically learn good features, and eliminate the manual selection process. As well as a hierarchical visual processing system for reference people, we get a conclusion that deep
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.