Search Results

You are looking at 1 - 10 of 59 items for

  • Author: Jun Wang x
Clear All Modify Search
Open access

Jun-Ming Lu and Mao-Jiun Wang

A Computer-aided Production System for Mass Customization in Fashion

In order to meet the demands of the market, a computer-aided production system for mass customization in fashion is proposed. The system enables the automation of dimension collection, pattern generation and fabric cutting. By integrating the system with the processes of garment sewing, fitting test and final adjustment, mass customization can be realized in the apparel industry. For the manufacturers, the efficiency of the supply chain can be improved by reducing human efforts, costs, and production time. For the customers, better fitness with faster delivery stimulates the desire of purchase and enhances their satisfaction.

Open access

Qingshan Luan, Chenghua Wang, Xinliang Wang, Jianqiang Sun, Mingxiang Niu and Jun Wang

Abstract

Microphytoplankton communities in waters near the Antarctic Peninsula were investigated using collections made during two krill harvesting cruises in austral summer 2010/2011. Twenty−five net−haul samples were collected. The species composition was assessed, and the cell abundance was counted with a light microscope. A total of forty−four species were recorded, with diatoms being the most abundant group. The predominant species near the South Shetland Islands (SSIs) were Fragilariopsis kerguelensis, Pseudo−nitzschia lineola and Thalassiothrix antarctica, while Rhizosolenia antennata f. semispina was the most common species near the South Orkney Islands (SOIs). Habitat use was preferentially distributed. The average cell abundance of total phytoplankton was 6.6×1011 cells m−2 with high densities detected at the southwest tip of theAntarctic Peninsula. Cluster analysis clearly illustrated that the microphytoplankton communities were different at the SSIs and SOIs. Correlation analysis was applied to interpret the relationship between phytoplankton distribuion and associated hydrographic conditions. Total phytoplankton abundance showed a significant negative correlation with sea surface salinity (p <0.01). The results implied that the high phytoplankton biomass was supported primarily by suitable physical conditions in the upper water column, i.e., relatively stable, stratified and well−lighted seawaters. Water stability in combination with the depth of the upper mixed layer might be the main factor control− ling the phytoplankton distribution in waters near the Antarctic Peninsula.

Open access

Bo Zhou, Jun Wang and Jinfeng Qi

Abstract

The potential of electronic nose to distinguish of wheat seeds was studied. The reproducibility and practicability of electronic nose data was evaluated by repeating the analysis of samples with a time difference of two months. The principle components analysis and linear discriminant analysis were applied to the generated patterns to distinguish the varieties of wheat seeds. The results showed that they could distinguish the wheat varieties properly. The stepwise discriminant analysis and a three-layer backpropagation neural network were developed for pattern prediction models. The results showed that both models could identify the wheat varieties, the back-propagation neural network presented the higher percent of correct classifications in comparison to stepwise discriminant analysis.Moreover, gas chromatographymass spectrometry analysis of the headspaces of same samples confirmed that electronic nose as a powerful tool is able to identify thewheat seeds.

Open access

Huijuan Liu, Jun Wang and Zhenyang Zhang

Abstract

The pole phase modulation (PPM) technique is an effective method to extend speed range and torque capabilities for an integrated starter and hybrid electric vehicles applications. In this paper, the five pole-phase combination types of a multiphase induction motor (IM) with 36 stator slots and 36 stator conductors are presented and compared quantitatively by using the time-stepping finite element method (TS-FEM). The 36 stator conductors of the proposed multiphase IM are fed by a 36 leg inverter and the current phase angle and amplitude of each stator conductor can be controlled independently. This paper focuses on the winding connection, the PPM technique and the performance comparative analysis of each pole-phase combination types of the proposed multiphase IM. The flux distribution, air-gap flux density, output torque, core losses and efficiency of five pole-phase combination types have been investigated.

Open access

Wei-Wei Zhang, Qing Wang, Xiang-Jun Xie and Jun-Li Si

Abstract

We report a case of a 78-year-old male was admitted for 2 years of blood CA19-9 >1000 kU/L found at physical examination. Abdominal computed tomography, barium meal and gastrointestinal endoscopy did not find any malignancy. Position emission tomography indicated interstitial pulmonary fibrosis (IPF) (severe) accompanied with reactive hyperplasia of mediastinal lymph node and bilateral pleural thickening. The patient also claimed to have rheumatoid arthritis (RA) for more than 40 years. Then final diagnosis was RA with IPF. The patient’s blood CA19-9 was improved after 5-day treatment of hormone inhalation.

Open access

Gang Xiong, Zhi-yong Huang, Kai-chan Cai, Ruijing Cai, Jun Zhang and Wu-jun Wang

Differentially Expressed Proteins between Esophageal Squamous Cell Carcinoma and Adjacent Normal Esophageal Tissue

Proteomics was employed to identify the differentially expressed proteins between esophageal squamous cell carcinoma (ESCC) and adjacent normal esophageal tissues. ESCC tissues and adjacent normal tissues were obtained from 10 patients with ESCC and the proteins were extracted and subjected to two-dimensional gel electrophoresis (2-DE). The differentially expressed proteins were identified after image analysis, and matrix assisted laser desorption ionisation time-of-flight mass spectrometry (MALDI-TOF-MS) was used to confirm these proteins. Immunohistochemistry was then performed to detect the expressions of HSP27 and ANX1 in ESCC tissues and adjacent normal tissues. A total of 6 differentially expressed proteins were identified by peptide mass fingerprinting, among which SCCA1, KRT4 and ANX1 were down-regulated and TIM1, MnSOD and HSP27 up-regulated in the ESCC. Immunohistochemistry showed HSP27 was highly expressed in the ESCC which, however, had a low expression of ANX1. These findings were consistent with those in proteomics. There were differentially expressed proteins between ESCC and adjacent normal tissues. The investigation of differentially expressed proteins between ESCC and normal esophageal tissue may provide evidence for the molecular pathogenesis of ESCC.

Open access

Jun Cheng, Min Li, Ping Gao, Jin-ling Dong and Qi Wang

Abstract

Liver steatosis is a pathological hallmark in patients with chronic hepatitis C (CHC). Increased lipid uptake, decreased lipid secretion, increased lipid synthesis and decreased lipid degradation are all involved in pathogenesis of steatosis induced by hepatitic C virus (HCV) infection. Level of low density lipoprotein receptor (LDL-R) and activity of peroxisome proliferator-activated receptor (PPAR) α is related to liver uptake of lipid from circulation, and affected by HCV. Secretion via microsomal triglyceride transfer protein (MTTP), and formation of very low density lipoprotein (VLDL) have been hampered by HCV infection. Up-regulation of lipid synthesis related genes, such as sterol regulatory element-binding protein (SREBP)-1, SREBP-2, SREBP-1c, fatty acid synthase (FASN), HMG CoA reductase (HMGCR), liver X receptor (LXR), acetyl-CoA carboxylase 1 (ACC1), hepatic CB (1) receptors, retinoid X receptor (RXR) α, were the main stay of liver steatosis pathogenesis. Degradation of lipid in liver is decreased in patients with CHC. There is strong evidence that heterogeneity of HCV core genes of different genotypes affect their effects of liver steatosis induction. A mechanism in which steatosis is involved in HCV life cycle is emerging.

Open access

Jun Cheng, Min Quan, Min Li, Shun-ai Liu and Qi Wang

Abstract

Hepatitis B virus (HBV) circulates in blood and replicates in the presence of quasispecies. During HBV replication, HBV DNA polymerase lacks fidelity and proofreading function partly because its exonuclease activity is either absent or deficient. Therefore, HBV genome is mutated with unusually high frequency. And these mutations can affect more than one open reading frame due to overlapping genes. Otherwise, natural substitutions, deletions or insertions involving the Cp/EN∥ locus in the X gene can significantly alter the extent of viral replication activity. Particular selection pressures such as host immune system and antiviral therapy readily select out escape mutants from this pre-existing quasispecies pool. Antiviral drug resistance in chronic hepatitis B (CHB) can be caused by the viral mutation frequency, the intrinsic mutability of the antiviral target site, the selective pressure exerted by the drug, the magnitude and rate of virus replication, the overall replication fitness of the mutant, the genetic barrier of the compound and the availability of replication space. Potent inhibition of HBV replication could be able to prevent the development of drug resistance because mutagenesis is replication dependent. Viral load may decline to a point where the continued production of quasispecies with the potential to resist new drug treatments no longer occurs, if viral replication can be suppressed for a sufficient length of time.

Open access

Jun Cheng, Min Quan, Min Li, Shun-ai Liu and Qi Wang

Abstract

Covalently closed circular (ccc) DNA of hepatitis B virus (HBV) existed in the nuclei of HBV infected hepatocytes with a half-life time of 14.3 years in a mathematic model. Viral protein feedback regulation in HBV life cycle to maintain vital viral replication is an important mechanism. Interleukin-6, epithelial growth factor, heme oxygenase-1, histones, and hepatocyte nuclear factors are demonstrated as the key regulators for HBV life cycle. CpG island structure and methylation status are involved in the regulation of HBV DNA replication. Nucleos(t)ide analogues are widely used in the clinical practice for the treatment of chronic hepatitis B patients, although no evidence indicating a direct inhibiton of HBV cccDNA. In the future, along with the study of HBV life cycle, new drugs including RNA interference technique, will pave the way to eliminate the HBV cccDNA from infected hepatocytes resulting final cure of chronic hepatitis B.