275 research outputs found
Implementation of Suffix Trees Using Two Linear Time Algorithms and Their Application to String Matching
A suffix tree is a trie-like data structure representing all suffixe of a string. Such trees have a central role in many algorithms on strings, such as finding the longest repeated substring, finding all squares in a string, approximate string matching, data compression, and DNA sequence assembly. It is quite commonly felt, however, that the linear-time suffix tree algorithms presented in the literature are rather difficult to grasp. I implemented the suffix trees using two linear-time algorithms and tested the application to string matching in the thesis
Ecological performance evaluation methods in urban existing community regeneration: a comprehensive review
Microencapsulation of paraffin with poly (urea methacrylate) shell for solar water heater
Previous research has demonstred that microencapsulated phase change materials (MEPCMs) could significantly increase the energy storage density of solar thermal energy storage (TES) systems. Compared with traditional phase change materials (PCMs), MEPCMs have many advantages since they can limit their exposure to the surrounding environment, enlarge the heat transfer area, and maintain the volume as the phase change occurs. In this study, a new MEPCM for solar TES systems is developed by encapsulation of paraffin wax with poly (urea formaldehyde) (PUF). The experimental results revealed that agglomeration of MEPCM particles occurred during the encapsulation process which affected the uniformity of the particle size distribution profile when sodium dodecyl sulfate was used as an emulsifier. The differential scanning calorimetric (DSC) analysis results showed that the melting temperatures were slightly increased by 0.14-0.72 â—¦C after encapsulation. A thermogravimetric (TG) test showed that the sample weight decreased while the weight loss starting temperature was slightly increased after encapsulation. Overall, the sample UF-2, fabricated with the binary emulsifiers of Brij 35 and Brij 30 and 5% nucleating agent, resulted in good particle dispersion and shell integrity, higher core material content and encapsulation efficiency, as well as improved thermal stability
Mass Ratio Distribution of Hierarchical Triple Systems from the LAMOST-MRS Survey
Hierarchical triple-star systems consists of three components organised into
an inner binary (,) and a more distant outer tertiary ()
star. The LAMOST Medium-Resolution Spectroscopic Survey (LAMOST-MRS) has
offered a great sample for the study of triple system populations. We used the
Peak Amplitude Ratio (PAR) method to obtain the mass ratio (,
) of a triple system from its normalised spectrum. By
calculating Cross-Correlation Function (CCF), we determined the correlation
between the mass ratio (/(+)) and the
amplitude ratio (/(+)). We derived of
and between 0.2 and 0.8. By fitting a power-law
function of the corrected distribution, the
are estimated to be ,
and for A, F and G type stars. The derived
-values increase as the mass decrease, indicating that
less massive stars are more likely to have companion stars with similar masses.
By fitting a power-law function of the corrected
distribution, the are estimated to be
, and for G, F and A type
stars, respectively. The -values show a trend of
growth toward lower primary star masses
Glomerular Endothelial Cells Are the Coordinator in the Development of Diabetic Nephropathy
The prevalence of diabetes is consistently rising worldwide. Diabetic nephropathy is a leading cause of chronic renal failure. The present study aimed to explore the crosstalk among the different cell types inside diabetic glomeruli, including glomerular endothelial cells, mesangial cells, podocytes, and immune cells, by analyzing an online single-cell RNA profile (GSE131882) of patients with diabetic nephropathy. Differentially expressed genes in the glomeruli were processed by gene enrichment and protein-protein interactions analysis. Glomerular endothelial cells, as well as podocytes, play a critical role in diabetic nephropathy. A subgroup of glomerular endothelial cells possesses characteristic angiogenesis genes, indicating that angiogenesis takes place in the progress of diabetic nephropathy. Immune cells such as macrophages, T lymphocytes, B lymphocytes, and plasma cells also contribute to the disease progression. By using iTALK, the present study reports complicated cellular crosstalk inside glomeruli. Dysfunction of glomerular endothelial cells and immature angiogenesis result from the activation of both paracrine and autocrine signals. The present study reinforces the importance of glomerular endothelial cells in the development of diabetic nephropathy. The exploration of the signaling pathways involved in aberrant angiogenesis reported in the present study shed light on potential therapeutic target(s) for diabetic nephropathy
Social behavioral sensing: an exploratory study to assess learning motivation and perceived relatedness of university students using mobile sensing
Learning motivation plays a crucial role in student’s daily
study life since it greatly affects academic performance and
engagement. Perceived relatedness, based on self-determined
theory, is an important predictor of learning motivation. Today,
assessment for both of them still relies on subjective
evaluations and self-reports, which is time-consuming and
onerous. Hence, we propose a novel approach blended with
mobile sensing by simultaneously collecting psychological
measurements and objective mobile sensing data from N=58
undergraduates to explore new methods of assessing learning
motivation and perceived relatedness. We identify a variety of
social behavioral patterns from mobile sensing data, and
investigate associations between psychological measures and
these patterns. Our study helps enlighten what the new forms
of assessing learning motivation and perceived relatedness in
education could be, and paves the way for personalizing
intervention in future research.This research was supported by the National Natural Science Foundation of China (No. 62077027), and the Humanity and Social Science Youth Foundation of Ministry of Education of China (No. 20YJC190034)
Cyclic helix B peptide inhibits ischemia reperfusion-induced renal fibrosis via the PI3K/Akt/FoxO3a pathway
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