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Chapter and Conference Paper
Research Progress on Mercury Ion Microwave Clock for Time Kee**
Mercury ion microwave clock has great prospect in timekee** and space applications for its excellent frequency stability and very low drift rate. In recent years, we have been studying the method to maintain...
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Chapter and Conference Paper
Progress Towards a Miniaturized Mercury Ion Clock for Space Application
A compact mercury ion microwave clock prototype using sealed vacuum system has been developed in Wuhan institute of Physics and Mathematics (WIPM) since 2018. In this letter, we report the recent progress on t...
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Chapter and Conference Paper
Towards Empty Answers in SPARQL: Approximating Querying with RDF Embedding
The LOD cloud offers a plethora of RDF data sources where users discover items of interest by issuing SPARQL queries. A common query problem for users is to face with empty answers: given a SPARQL query that r...
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Chapter and Conference Paper
Quality Prediction of Newly Proposed Questions in CQA by Leveraging Weakly Supervised Learning
Community Question Answering (CQA) websites provide a platform to ask questions and share their knowledge. Good questions in CQA websites can improve user experiences and attract more users. To the best of our...
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Chapter and Conference Paper
Progress on Linear Ion Trap Mercury-Ion Frequency Standard
Mercury-ion microwave frequency standard could achieve excellent stability and insensitivity to environment perturbations, due to its large atomic mass and Q value of clock transition spectrum line. These perf...
