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In industrial production, bearings are widely used in rotating machinery. Bearing fault diagnosis plays an important role in preventing disasters and protecting lives and properties. Because weak bearing fault characteristics are often submerged in a noise background, the difficulty of extracting the bearing fault feature information is increased. Therefore, this paper proposed a method which combined the general scale transformation theory with the adaptive stochastic resonance in a periodical potential system. This method was used to detect the fault characteristics of the bearing rolling element in the noise background. In the proposed method, general scale transformation was first used to satisfy the condition of small parameters in the stochastic resonance. Then the random particle swarm optimization algorithm was applied to choose the optimal system parameters to affect the adaptive stochastic resonance. Meanwhile, an improved signal-to-noise ratio (ISNR) was set as the evaluation index in the adaptive stochastic resonance. After being processed and optimized by the adaptive stochastic resonance based on the general scale transformation method, the experimental weak signal with a rolling element bearing failure under the noise background could be effectively extracted. In addition, the effect of processing fault signals by the adaptive stochastic resonance in the periodical potential system was compared with the adaptive stochastic resonance method in a bistable system based on the general scale transformation. The results show that the adaptive stochastic resonance in the periodical potential system increases the signal-to-noise ratio better than the adaptive stochastic resonance in the bistable system. Moreover, the adaptive stochastic resonance in the periodical potential system involves fewer iterations, and the computation time is shorter than that of the adaptive stochastic resonance in the bistable system. This indicates that the proposed method of diagnosing bearing element fault based on the general scale transformation and the adaptive stochastic resonance in a periodical potential system is superior. Especially in engineering systems, a large amount of data and extensive computation time is required for fault diagnosis. Because of the early fault warning system achieved by the proposed method, fault diagnosis is more efficient and unnecessary losses are reduced. Therefore, the proposed method can serve as a reference in improving the efficiency of mechanical equipment fault diagnosis in engineering systems.

Simple Summary: Gastric cancer (GC) ranks as one of the most life-threatening malignancies worldwide, and over one billion new cases and 783,000 deaths were reported last year. The incidence of GC is exceptionally high in Asian countries. Multiple oncogenic signaling pathways are aberrantly activated and implicated in gastric carcinogenesis, leading to the malignant phenotype acquisition. G-protein-coupled receptor (GPCR) signaling is one of them, and the aberrant activation of GPCRs and G proteins promotes GC progression. The activated GPCRs/G proteins might serve as useful biomarkers for early diagnosis, prognostic prediction, and even clinically therapeutic targets. This review summarized the recent research progress of GPCRs and highlighted their mechanisms in tumorigenesis, especially in GC initiation and progression. G-protein-coupled receptors (GPCRs) belong to a cell surface receptor superfamily responding to a wide range of external signals. The binding of extracellular ligands to GPCRs activates a heterotrimeric G protein and triggers the production of numerous secondary messengers, which transduce the extracellular signals into cellular responses. GPCR signaling is crucial and imperative for maintaining normal tissue homeostasis. High-throughput sequencing analyses revealed the occurrence of the genetic aberrations of GPCRs and G proteins in multiple malignancies. The altered GPCRs/G proteins serve as valuable biomarkers for early diagnosis, prognostic prediction, and pharmacological targets. Furthermore, the dysregulation of GPCR signaling contributes to tumor initiation and development. In this review, we have summarized the research progress of GPCRs and highlighted their mechanisms in gastric cancer (GC). The aberrant activation of GPCRs promotes GC cell proliferation and metastasis, remodels the tumor microenvironment, and boosts immune escape. Through deep investigation, novel therapeutic strategies for targeting GPCR activation have been developed, and the final aim is to eliminate GPCR-driven gastric carcinogenesis. [ABSTRACT FROM AUTHOR]

PURPOSE: To investigate the clinical effects of complete denture with additional 3mm reduction of vertical dimensions in the aged patients. METHODS: Forty edentulous patients with severe resorption of residual ridge were treated with two kinds of complete dentures, i.e. traditional complete denture (TCD) and special complete denture with additional 3mm reduction of vertical dimensions (SCD). After three months of wearing, the masticatory efficiency of dentures were measured by colormetric analysis and the incidences of sore spot was assessed by SAS 6.04 software package. RESULTS: there was no significant difference between TCD and SCD for the masticatory efficiency (P>0.05). But the number of sore spots in SCD was significantly less than that in TCD (P<0.05). CONCLUSION: Complete denture with additional 3mm reduction of vertical dimensions is feasible for clinical practice in the aged patients. [ABSTRACT FROM AUTHOR]

Objective: To systematically evaluate the efficacy and safety of DCAG regimen for treating the intermediate or high risk MDS and AML., Methods: PubMed, EMbase, The Cochrane Library, WanFang Data and CNKI databases were searched to collect randomized controlled trials (RCTs) of decitabine combined with CAG regimen for intermediate or high risk MDS and AML from inception to March, 2018. The quality of each RCT was evaluated by the Cochrane collaboration´s tool for assessing the risk of bias.Then, the data were analyzed by using RevMan 5.3., Results: Twenty-four RCTs were included in the meta-analysis, containing 1 557 patients with intermediate or high-risk MDS and AML, of whom 594 were AML patients and 590 were MDS patients. The patients treated with the DCAG regimen were enrolled in DCAG group, and the patients treated with single-agent decitabine or CAG regimen were enrolled in control group., Results: The results of meta-analysis showed that compared with other therapies, the complete remission rate of DCAG regimen in patients with intermediate or high-risk MDS and AML was high (RR=1.63，95% CI=1.43-1.85，P＜0.000 01), and the overall response rate was also high (RR=1. 35，95% CI=1.24-1.46，P＜0.000 01); Subgroup analysis results showed that DCAG regimen was better than CAG regimen in the complete remission rate (RR=1.71，95% CI=1.49-1.97，P＜0.000 01), and slightly better than single-agent decitabine group (RR=1.43，95% CI=1.08-1.91，P=0.01). In terms of adverse reactions, there was no statistically significant difference in the rates of myelosuppression, pulmonary infection, gastrointestinal reactions, and bleeding events between the 2 groups (P＞0.05)., Conclusion: DCAG regimen has significant efficacy in the treatment of intermediate or high-risk MDS and AML, and is superior to CAG regimen and single-agent dicitabine regimen. As compared with control group, there was no significant difference in adverse events. Due to limited quantity and quality of the included studies, more high quality studies are needed to verify above mentioned conclusion.

Objective: To investigate the abnormal expression of interferon-induced transmembrane protein 3 (IFITM3) in hepatocellular carcinoma (HCC) and the effect of IFITM3 knock-down on the biological behaviors of hepatocellular carcinoma HepG2 cells., Methods: Western blot analysis and immunohistochemical staining were used to determine the expression of IFITM3 protein in 60 HCC samples and paired adjacent tissues. A small interfering RNA fragments of IFITM3 (IFITM3 siRNA) was transiently transfected into HepG2 cells and expressions of IFITM3 at mRNA and protein levels were examined by qRT-PCR and Western blotting. The changes in the proliferation of the transfected cells were determined using cell counting kit 8 (CCK8) assay, and the cell invasion and migration were tested using Transwell assay and wound-healing assay., Results: Compared with the adjacent tissues, HCC tissues expressed significantly higher levels of IFITM3. In HepG2 cells, transfection with IFITM3 siRNA resulted in significant down-regulation of IFITM3 expression at both the protein and mRNA levels and obviously suppressed cell proliferation, invasion, and migration ability as compared with the cells transfected with scrambled siRNA and control cells (P<0.05)., Conclusions: IFITM3, which is overexpressed in HCC, plays a vital role in the proliferation and invasion of HCC cells and may serve as a potential target for gene therapy of HCC.

Purpose: To investigate the clinical effects of complete denture with additional 3mm reduction of vertical dimensions in the aged patients., Methods: Forty edentulous patients with severe resorption of residual ridge were treated with two kinds of complete dentures, i.e. traditional complete denture (TCD) and special complete denture with additional 3mm reduction of vertical dimensions (SCD). After three months of wearing, the masticatory efficiency of dentures were measured by colormetric analysis and the incidences of sore spot was assessed by SAS 6.04 software package., Results: there was no significant difference between TCD and SCD for the masticatory efficiency(P>0.05). But the number of sore spots in SCD was significantly less than that in TCD (P<0.05)., Conclusion: Complete denture with additional 3mm reduction of vertical dimensions is feasible for clinical practice in the aged patients.

Objective: To explore the association between hypertension and the tendency of change among children,so as to lay a foundation for the prevention and control of hypertension., Methods: Based on findings from the prevalence survey that carried out in September 1999 in Daqing of Heilongjiang province. New admission children were selected as subjects to conduct a five-year cohort study. All the subjects were interviewed with questionnaires and their blood specimens were collected for biochemical analysis. All data were analyzed using SPSS 10.0 software. Results The prevalence of hypertension among 447 children was found 2.01% at the baseline study but increased to 5.37% in the fifth year. During a five year period, the systolic pressure level among children increased from (100.65 +/- 11.62)mmHg (1 mm Hg = 0.133 kPa) to (106.67 +/- 9.29) mm Hg,while the diastolic pressure level was from (66.27 +/- 11.31) mm Hg to (70.28 +/- 7.98) mm Hg and showed significant difference between boys and girls. There were association between hypertension and family history, body mass index (BMI), triglyceride, insulin, insulin resistance index while insulin sensitivity index and family history, BMI and insulin sensitivity index appeared to be the important factors. Children under this study were divided to 'with family history or without' and then every group was divided to 'with over weight-obesity or normal'. Obesity and insulin sensitivity seemed the key risk factors on hypertension. Descent of insulin sensitivity was an independent risk factor., Conclusion: The level of blood tension among children in Daqing city was higher than that from the national data. The present study confirmed that over-weight,obesity, heredity and insulin resistance were the risk factors of hypertension while insulin resistance was related to hypertension. The interaction of these risk factors was independent or correlated to each other.

Objective: To investigate the puberty timing in healthy adolescent boys in Daqing city in northern China., Methods: A cross-sectional and longitudinal combined survey was performed. On 150 male students aged 6-15. Follow up was conducted for 4 years. The serum levels of luteinizing hormone (LH), Follicular Stimulating Hormone (FSH) and total testosterone (TT) were measured. The puberty timing and anthropometry including the body height, weight, and genital development according to Tanner's stages were all recorded., Results: The mean age of puberty onset in healthy adolescent boys is (12.0+/-1.6) years. The growth velocity in the first year after puberty onset is (6.9+/-0.4) cm/year. The level of plasma TT at the time of puberty onset is (1.0+/-0.3) nmol/L., Conclusion: The puberty timing of boys in the Daqing city, northern China is in the range from 8 to 14 years.

Aim: To observe the effect of rhodiola on human umbilical vein endothelial cell line EVC-304., Methods: EVC-304 was cultured and divided into two groups: control group and rhodiola-treated group. Three days after treatment, cell survival rate-drug concentration curve was obtained by counting the survival cells, and cells in each group were stained by Wright's stain and observed under microscope. Cell cycle was determined by flow cytometry (FCM)., Results: The survival cells in rhodiola-treated group was much less than those in control group. More cells in rhodiola-treated group stayed in G(1) phase while less in S phase when compared with those in control group by FCM., Conclusion: Rhodiola can inhibit the growth of human endothelial cell line EVC-304, perhaps through inhibiting the proliferation of the cells. This may lay the foundation for the mechanism study and clinical application of rhodiola in prevention of pulmonary artery hypertension.

Objective: To investigate the process of puberty development of healthy adolescent girls in Northern China., Methods: 288 adolescent girls of Daqing city, Heilongjiang province, aged 5 to 16, were studied and followed up yearly for four years. The height, weight, fat percentage, second sex characteristics, and the blood levels of follicle stimulating hormone (FSH), luteinizing hormone (LH), and estradiol (E(2)) were examined., Results: The mean age of puberty onset of these healthy adolescent girls was 8.5 years +/- 1.1 years. The blood levels of FSH, LH and E(2) were 0.2 mIU/L, 1.1 mIU/L and 0.06 nmol/L respectively (the 95 percentiles were 2.5 mIU/L, 2.3 mIU/L and 0.12 nmol/L respectively). Their mean age of menarche was 12.4 years +/- 1.2 years. The mean age of breast development was 8.8 years +/- 1.1 years., Conclusion: The girls in Northern China begin their puberty development at younger ages than reported before.

Background: To observe cytopathogenic effect of Hantaan virus (HV) on cultured human bone marrow cells., Methods: Light and transmission electron microscopy and direct immunofluorescent technique were applied to study cellular structure especially ultrastructural changes of bone marrow cells from patients with Hantaan virus infection. Bone marrow cells of one healthy volunteer were also studied as control., Results: The antigen of HV was found in bone marrow cells of 20 of 27 HFRS patients by the aid of direct immunofluorescent technique. It was found that the granulocytes had the highest percentage of HV antigen positive cells (76%), followed by monocytes (65%), lymphocytes (40%), megakaryocytes (20%) and the lowest was found in erythrocytes (3.7%). The injury of cell membrane after infection with HV was significantly more severe than that in the control group under the light and electron microscopy., Conclusion: This study demonstrated that HV could attack human bone marrow cells and cause cytopathogenic effect on them.