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Search Results: 1 - 10 of 44091 matches for " YuanQing Wu "
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Equivalence relation and partial ordering of parallel mechanisms with applications to mechanism synthesis and mobility analysis
YuanQing Wu,Han Ding
Chinese Science Bulletin , 2010, DOI: 10.1007/s11434-009-3683-5
Abstract: Motion type (or motion pattern) of a mechanism is defined as the set of all rigid motions achievable by the mechanisms’s end-effector; the motion type of a parallel mechanism equals the intersection set of all subchain motion types. The motion type of a non-instantaneous parallel mechanism locally agrees with a regular submanifold (or a Lie subgroup in particular) of the special Euclidean group SE(3). Based on submanifold germs of SE(3), we can define an equivalence relation and a partial order relation for both motion types and parallel mechanisms: two motion types are equivalent if and only if they agree on an open neighborhood around the identity element of SE(3); two motion types are comparable if and only if one is a submanifold of the other on an open neighborhood around the identity of SE(3). It is also possible to define equivalence relation and partial ordering on the collection of parallel mechanisms. In this paper, we first study properties of the equivalence and partial order relation of both motion types and parallel mechanisms, then we discuss their application in type synthesis, mobility analysis and non-overconstrained ness realization of parallel mechanisms.
Adaptability Adjustment of China’s Fiscal and Taxation Policies under “New Normal”—Based on Korea’s Experience  [PDF]
Yuanqing Han
Modern Economy (ME) , 2016, DOI: 10.4236/me.2016.714149
Abstract: In recent years, the economic development of China has gradually showed the different characteristics from the past and has entered the new normal. Under the new normal, China’s economic growth trends and characteristics have undergone the great changes, the economic growth is in transition from high-speed growth to the medium-high-speed growth, and the economic growth model will be transferred from relying on exports and investment to relying on being driven by the domestic demand, the key for economic growth will be transferred from the factor driven to the innovation driven. At present, the main task of China’s economic development is to adapt to new normal. As an important means of national macro-control, fiscal and taxation policies have their own problem of inadequate system supply. This thesis intends to study the deficiencies of China’s fiscal and taxation policies under new normal, and propose the suggestions for the adaptability adjustment of fiscal and taxation policies. The study finds that under new normal, there’s difficult economic transition due to the insufficient supply of China’s fiscal and taxation policies in terms of the income, encourage innovation and environmental protection, and it is urgent to supplement and adjust China’s existing fiscal and taxation policies. Based on the reference to beneficial experiences of adjustment of Korea’s fiscal and taxation policies, combined with the actual situation of China, this thesis puts forward that the fiscal and taxation policies in China under new normal should be improved greatly from the aspects of tax structure, fiscal and taxation support of the scientific and technological innovation and fiscal and taxation policies of environmental protection, and others.
Design principles of the sparse coding network and the role of “sister cells” in the olfactory system of Drosophila
Danke Zhang,Yuanqing Li,Si Wu,Malte J. Rasch
Frontiers in Computational Neuroscience , 2013, DOI: 10.3389/fncom.2013.00141
Abstract: Sensory systems face the challenge to represent sensory inputs in a way to allow easy readout of sensory information by higher brain areas. In the olfactory system of the fly drosopohila melanogaster, projection neurons (PNs) of the antennal lobe (AL) convert a dense activation of glomeruli into a sparse, high-dimensional firing pattern of Kenyon cells (KCs) in the mushroom body (MB). Here we investigate the design principles of the olfactory system of drosophila in regard to the capabilities to discriminate odor quality from the MB representation and its robustness to different types of noise. We focus on understanding the role of highly correlated homotypic projection neurons (“sister cells”) found in the glomeruli of flies. These cells are coupled by gap-junctions and receive almost identical sensory inputs, but target randomly different KCs in MB. We show that sister cells might play a crucial role in increasing the robustness of the MB odor representation to noise. Computationally, sister cells thus might help the system to improve the generalization capabilities in face of noise without impairing the discriminability of odor quality at the same time.
A Study on the Work Well-Being of Personnel in Telecommunication Marketing as Well as Its Influencing Factors in China —Based on the Researches in the Guangzhou Branch of China Telecom  [PDF]
Yuanqing Shen, Long Li
Technology and Investment (TI) , 2015, DOI: 10.4236/ti.2015.61004
Abstract: Based on literature research and interviews, this study proposes three main Work Well-Being dimensions in line with the telecommunications marketing personnel characteristics. They are organizational commitment, overall reward and family support. Then the study builds the concept model. With data from questionnaires of 155 samples, this research analyzes the work well-being of telecommunications marketing personnel as well as its influencing factors with living examples. The results show that organizational commitment and total compensation have a significant positive correlation with work well-being, while family support is insignificantly negative correlated with work well-being. There are some factors that have more positive contribution to work well-being: Non-economic compensation, economic compensation, ideal expectation, social norms, economic costs, while the negative factors are emotion recognition, career opportunity, family time and family behavior.
Detection of dissolved organic matter in water based on characteristic peaks of 3D fluorescence spectra
基于三维荧光光谱特征峰的水体有机污染物综合指标检测

Yan Yun,Du Shuxin,Wu Yuanqing,
严赟
,杜树新,吴元清

环境工程学报 , 2011,
Abstract: Modelling for detecting dissolved organic matter with 32 water samples is addressed, using several typical organic characteristic peaks of 3D fluorescence spectra such as Peak A (humic-like), Peak C (humic-like), Peak B (tyrosine-like), Peak T1 (tryptophan-like) and Peak T2 (tryptophan-like). Experiments show that the modeling method is not satisfactory to detection of TOC and COD in water from different sources. It is concluded that the modeling method for detecting dissolved organic matters, based on the typical characteristic peaks of 3D fluorescence, is not universal for the variant water.
OPTICAL PULSATION AND ITS NONLINEAR PROCESS IN PHOTOREFRACTIVE MATERIAL
光折变的光学脉动现象及其非线性过程

WU YUANQING,XU JINJUN,LIU SIMIN,ZHANG GUANGYIN,
武原庆
,许京军

红外与毫米波学报 , 1991,
Abstract: The optical pulsation phenomenon which occurs in two-beam coupling and four-wave mixing in photorefractive LiNbO_3:Fe crystal is reported. This phenomenon is considered to originate from the trap-recharging wave in LiNbO_3:Fe crystal, which induces a moving phase grating in the photorefractive material.
Developmental Dysplasia of the Hip, Age, BMI, Place of Residence and Tobacco Abuse Increase the Odds of Aseptic Loosening in Chinese Patients
Chuanlong Wu, Xinhua Qu, Yuanqing Mao, Huiwu Li, Fengxiang Liu, Zhenan Zhu
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0085562
Abstract: Purpose The purpose of this hospital-based case-control study was to evaluate the patient-related risk factors for aseptic loosening after total hip arthroplasty (THA) and total knee arthroplasty (TKA) in Chinese patients. Methods From January 2000 to December 2012, 67 patients undergoing THA and TKA who developed aseptic loosening were detected as case subjects and 336 patients without aseptic loosening, matched by the year of index surgery and type of surgery, were selected as controls. Conditional logistic regression was used to compute odds ratios (ORs) and 95% confidence intervals (CIs). Results The demographic factors and comorbid conditions associated with a risk-adjusted increase in aseptic loosening (in decreasing order of significance) were a rural place of residence (OR = 2.28; 95% CI: 1.21–4.30; p = 0.011), body mass index (BMI) ≥28 kg/m2 (vs. 18.5–28 kg/m2) (OR = 2.29; 95% CI: 1.19–4.41; p = 0.013), developmental dysplasia of the hip (DDH) (OR = 2.91; 95% CI: 1.11–7.66; p = 0.030), tobacco abuse (OR = 2.88; 95% CI: 1.05–7.89; p = 0.039), and age <45 years (vs. 45–65 years) (OR = 2.63; 95% CI: 1.01–6.80; p = 0.047). Conclusions Patients aged <45 years and those with a BMI of ≥28 kg/m2, a preoperative diagnosis of DDH, history of tobacco abuse, or living in rural areas are at increased risk for aseptic loosening after THA and TKA in Chinese population. Additional systematic large-scale studies are needed to verify these results.
Genetic Variations in the Transforming Growth Factor Beta Pathway as Predictors of Bladder Cancer Risk
Hua Wei, Ashish M. Kamat, Saad Aldousari, Yuanqing Ye, Maosheng Huang, Colin P. Dinney, Xifeng Wu
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0051758
Abstract: Bladder cancer is the fifth most common cancer in the United States, and identifying genetic markers that may predict susceptibility in high-risk population is always needed. The purpose of our study is to determine whether genetic variations in the transforming growth factor-beta (TGF-β) pathway are associated with bladder cancer risk. We identified 356 single-nucleotide polymorphisms (SNPs) in 37 key genes from this pathway and evaluated their association with cancer risk in 801 cases and 801 controls. Forty-one SNPs were significantly associated with cancer risk, and after adjusting for multiple comparisons, 9 remained significant (Q-value ≤0.1). Haplotype analysis further revealed three haplotypes within VEGFC and two haplotypes in EGFR were significantly associated with increased bladder cancer risk compared to the most common haplotype. Classification and regression tree analysis further revealed potential high-order gene-gene interactions, with VEGFC: rs3775194 being the initial split, which suggests that this variant is responsible for the most variation in risk. Individuals carrying the common genotype for VEGFC: rs3775194 and EGFR: rs7799627 and the variant genotype for VEGFR: rs4557213 had a 4.22-fold increase in risk, a much larger effect magnitude than that conferred by common genotype for VEGFR: rs4557213. Our study provides the first epidemiological evidence supporting a connection between TGF-β pathway variants and bladder cancer risk.
Risk Factors for Periprosthetic Joint Infection after Total Hip Arthroplasty and Total Knee Arthroplasty in Chinese Patients
Chuanlong Wu, Xinhua Qu, Fengxiang Liu, Huiwu Li, Yuanqing Mao, Zhenan Zhu
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0095300
Abstract: Purpose The purpose of this hospital-based case–control study was to evaluate the risk factors for periprosthetic joint infection (PJI) of total hip arthroplasty (THA) and total knee arthroplasty (TKA) in Chinese patients. Method From January 2000 to December 2012, 45 patients undergoing THA and TKA who developed PJI were recruited for case subjects; controls were 252 without PJI, matched by year of index for surgery and type of surgery. Conditional logistic regressions were run to compute odds ratios (ORs) and 95% confidence intervals (CIs). Results Demographic factors and comorbid conditions associated with an increased adjusted risk of PJI (in decreasing order of significance) were diabetes (OR = 5.47, 95% CI: 1.77–16.97; p = 0.003), age (65–75 vs. 45–65 years) (OR = 3.36, 95% CI: 1.30–8.69; p = 0.013), BMI (≥28 vs. 18.5–28 kg/m2) (OR = 2.77, 95% CI: 1.20–6.40; p = 0.017), place of residence (rural) (OR = 2.63, 95% CI: 1.13–6.10; p = 0.025) and alcohol abuse (OR = 2.95, 95% CI: 1.06–8.23; p = 0.039). Conclusion Patients with diabetes, older age, BMI of ≥28 kg/m2 and alcohol abuse or living in rural areas, had increased PJI risk. Additional systematic large-scale studies are needed to verify these results.
Utility of Intraoperative Frozen Section in the Diagnosis of Periprosthetic Joint Infection
Chuanlong Wu, Xinhua Qu, Yuanqing Mao, Huiwu Li, Kerong Dai, Fengxiang Liu, Zhenan Zhu
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0102346
Abstract: Purpose Intraoperative frozen section (FS) is an effective diagnostic test for periprosthetic joint infection (PJI). We evaluated the diagnostic characteristics of single- and multiplex-site intraoperative FS, and evaluated the results of single-site FS combined with those of C-reactive protein (CRP) level and erythrocyte sedimentation rate (ESR) for assessing PJI. Methods We studied 156 painful joint arthroplasties in 152 consecutive patients presenting for revision total joint arthroplasty due to PJI. Receiver operating characteristic analysis was used to determine the optimal cutoff values for CRP level, ESR, and intraoperative FS histopathology. Sensitivity, specificity, positive and negative predictive values, and accuracy of the diagnostic tests were assessed using a 2×2 table. Results We investigated the diagnostic utility of polymorphonuclear leukocyte number (PMN) per high-power field (HPF) on FS. Our data showed that 5 PMNs per HPF is a suitable diagnostic threshold, with a high accuracy in single- and multiplex-site FS. Five PMNs in any 1 of 5 sites had the highest sensitivity of 0.86 and a specificity of 0.96. Five PMNs in every 1 of 5 sites had greater diagnostic utility, with a specificity of 1; however, the sensitivity of this measure fell to 0.62. Five PMNs in single-site FS had a sensitivity of 0.70 and a specificity of 0.94. Five PMNs in single-site FS or CRP level ≥15 mg/L increased the sensitivity to 0.92; however, the specificity decreased to 0.79. Conclusion Compared with single-site FS, any 1 positive site on multiplex-site FS may improve sensitivity, while every 1 positive site on multiplex-site FS may improve specificity. Five PMNs in any 1 of 5 sites on FS has excellent utility for the diagnosis of PJI. Additional systematic large-scale studies are needed to verify this result.
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