Topic Sentiment Joint Model with Word Embeddings

Abstract. Topic sentiment joint model is an extended model which aims to deal with the problem of detecting sentiments and topics simultaneously from online reviews. Most of existing topic sentiment joint modeling algorithms infer resulting distributions from the co-occurrence of words. But when the training corpus is short and small, the resulting distributions might be not very satisfying. In this paper, we propose a novel topic sentiment joint model with word embeddings (TSWE), which introduces word embeddings trained on external large corpus. Furthermore, we implement TSWE with Gibbs sampling algorithms. The experiment results on Chinese and English data sets show that TSWE achieves significant performance in the task of detecting sentiments and topics simultaneously

Notoginsenoside R1 Protects HUVEC Against Oxidized Low Density Lipoprotein (Ox-LDL)-Induced Atherogenic Response via Down-Regulating miR-132

Background/Aims: Radix notoginseng is a well-known traditional Chinese herbal medicine, has extensively pharmacological activities in cardiovascular system. Notoginsenoside R1 (NGR1) is one main active ingredient of Radix notoginseng. The purpose of this study was to evaluate the functional effects of NGR1 on atherosclerosis (AS). Methods: Human umbilical vascular endothelial cells (HUVECs) were subjected to oxidized low density lipoprotein (ox-LDL), before which cells were preconditioned with NGR1. Cell Counting Kit-8 (CCK-8) assay, flow cytometry, Transwell assay, quantitative real-time polymerase chain reaction (qRT-PCR) and Western blot were carried out to assess the impacts of ox-LDL and NGR1 on HUVECs. Besides, the expression of microRNA-132 (miR-132), and the regulatory role of miR-132 in Matrix Gla Protein (MGP) expression were measured by qRT-PCR and Western blot. Results: NGR1 pre-conditioning prevented ox-LDL-induced apoptosis, migration and overproduction of Monocyte Chemoattractant Protein 1 (MCP-1) and Intercellular Adhesion Molecule 1 (ICAM-1). miR-132 was up-regulated in response to ox-LDL while was down-regulated by NGR1 pre-conditioning. The protective actions of NGR1 in ox-LDL-treated HUVECs were enhanced by miR-132 inhibitor, while were attenuated by miR-132 mimic. Besides, the up-regulated miR-132 could further decrease the expression of MGP, which acted as an anti-migratory and anti-adhesive factor. Furthermore, ox-LDL-induced the activation of c-Jun N-terminal Kinase (JNK) and Nuclear Factor Kappa B (NF-κB) pathways were partially attenuated by NGR1, and were fully eliminated by NGR1 treatment together with MGP overexpression. Conclusion: NGR1 prevents ox-LDL-induced apoptosis, migration and adhesion-related molecule release in HUVECs possibly via down-regulating miR-132, and subsequent up-regulating MGP

Preparation and analysis of sodium carboxymethyl cellulose and its effect on xerophthalmia

1348-1353carboxymethyl cellulose (CMC) has been effectively synthesized with high yield and purity. With the prolongation of time after model establishment, the values of Schirmer Ⅰ test (S Ⅰ t) and breakup time of tear film gradually decreased. The α-MSH and CMC alone could ameliorate corneal tissue damage and corneal morphological abnormalities in the dry eye to some extent. However, compared with monotherapy, the treatment of α-MSH combined with CMC has a more significant positive effect on the improvement of tear secretion and the stability of tear film in dry eye model in the early stage after modeling. There are significant differences between the model control group and the normal control group at each time point after model establishment (all Pth, 14th, 21th and 28th days after treatment. After 7, 14 and 21 days treatment, the S Ⅰ t values in the α-MSH+CMC treatment group were 4.80±0.79, 4.10±0.52 and 4.30±0.86 mm, respectively

Singularity in the boundary resistance between superfluid 4^4He and a solid surface

We report new measurements in four cells of the thermal boundary resistance $R$ between copper and $^4$He below but near the superfluid-transition temperature $T_\lambda$. For $10^{-7} \leq t \equiv 1 - T/T_\lambda \leq 10^{-4}$ fits of $R = R_0 t^{x_b} + B_0$ to the data yielded $x_b \simeq 0.18$, whereas a fit to theoretical values based on the renormalization-group theory yielded $x_b = 0.23$. Alternatively, a good fit of the theory to the data could be obtained if the {\it amplitude} of the prediction was reduced by a factor close to two. The results raise the question whether the boundary conditions used in the theory should be modified.Comment: 4 pages, 4 figures, revte

Effect of HIP temperature and cooling rate on microstructure and hardness of joints for ODS-RAFM steels and JLF-1 steel

Dissimilar-metal joints between ODS-RAFM (oxide-dispersion-strengthened reduced activation ferritic/ martensitic) steels and JLF-1 steel were fabricated by hot isostatic pressing (HIP) at 1000 - 1100 °C with a cooling rate of 5 °C/min. After the HIP, it was always quenched martensite for JLF-1 steel. However, coarse precipitates were found in 9Cr-ODS. Additional annealing experiments to simulate HIP conditions were conducted for 9Cr-ODS with cooling rate ranged from 0.5 to 36 °C/min at 800 - 1100 °C. The results showed that, to form quenched martensite for 9Cr-ODS, the HIP temperature should be above 1000 °C with cooling rate no less than 25 °C/min. When the cooling rate is increased to 36 °C/min, the microstructure of 9Cr-ODS is quenched martensite with precipitate size similar as that before HIP. If the limitation of precipitate size in 9Cr-ODS is 0.2 μm, HIP temperature above 1050 °C with cooling rate no less than 30 °C/min is needed. In this case, post-weld heat treatment (PWHT) with only tempering is necessary to recover the microstructure of 9Cr-ODS to tempered martensite. For 12Cr-ODS, the HIP temperature and cooling rate has no effect on hardness and precipitate size. PWHT is not necessary for the single-metal joint of 12Cr-ODS from the view point of precipitation control. However, for the dissimilar-metal joints between ODS-RAFM steels and JLF-1 steel, the PWHT condition should be comprehensively determined by considering microstructural evolution of each part in the joints after HIP

Folate receptor-targeted mixed polysialic acid micelles for combating rheumatoid arthritis: in vitro and in vivo evaluation

Objective: Rheumatoid arthritis (RA) is associated with chronic inflammation. The suppression of inflammation is key to the treatment of RA. Glucocorticoids (GCs) are classical anti-inflammatory drugs with several disadvantages such as poor water solubility and low specificity in the body. These disadvantages are the reasons for the quick elimination and side effects of GCs in vivo. Micelles are ideal carriers for GCs delivery to inflamed synovium. We set out to improve the targeting and pharmacokinetic profiles of GCs by preparing a targeting micelle system. Methods: In this study, natural chlosterol (CC) and folic acid (FA) were used to fabricate polysialic acid (PSA) micelles for the targeted delivery of Dexamethasone (Dex). The biodistribution and therapeutic efficacy of the resulting micelles were evaluated in vitro and in vivo. Results: PSA-CC and FA-PSA-CC micelles showed a size below 100 nm and a moderate negative charge. PSA-CC and FA-PSA-CC micelles could also enhance the intracellular uptake of Dex and the suppression of tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6) in vitro and in vivo. Arthritis mice showed reduced paw thickness and clinical arthritis index using PSA-CC and FA-PSA-CC micelle treatment. Micellized Dex demonstrated a 4 ∼ 5 fold longer elimination half-life and a 2 ∼ 3 folds higher bioavailability than commercial Dex injection. FA modification significantly improved the anti-inflammatory efficacy of PSA-CC micelles. Conclusion: FA-PSA-CC micelles demonstrated significant advantages in terms of the suppression of inflammation and the treatment of inflammatory arthritis. These reliable and stable micelles possess a high potential to be transferred for clinical use