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Search Results: 1 - 10 of 159508 matches for " Li-Cheng Chang "
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Development of a simple force prediction model and consistency assessment of knee movements in ten-pin bowling
Li-Cheng Hsieh
Maejo International Journal of Science and Technology , 2012,
Abstract: The aim of this research is to use LabVIEW to help bowlers understand theirjoint movements, forces acting on their joints, and the consistency of their knee movements while competing in ten-pin bowling. Kinetic and kinematic data relating to the lower limbs were derived from bowlers’ joint angles and the joint forces were calculated from the Euler angles using the inverse dynamics method with Newton-Euler equations. An artificial-neural-network (ANN)-based data-driven model for predicting knee forces using the Euler angles was developed. This approach allows for the collection of data inbowling alleys without the use of force plates. Correlation coefficients were computed after ANN training and all values exceeded 0.9. This result implies a strong correlation between the joint angles and forces. Furthermore, the predicted 3D forces (obtained from ANN simulations) and the measured forces (obtained from force plates via the inverse dynamics method) are strongly correlated. The agreement between the predicted andmeasured forces was evaluated by the coefficient of determination (R2), which reflects the bowler’s consistency and steadiness of the bowling motion at the knee. The R2 value was beneficial in assessing the consistency of the bowling motion. An R2 value close to 1 implies a more consistent sliding motion. This research enables the prediction of the forceson the knee during ten-pin bowling by ANN simulations using the measured knee angles. Consequently, coaches and bowlers can use the developed ANN model and the analysis module to improve bowling motion.
Midkine translocated to nucleoli and involved in carcinogenesis
Li-Cheng Dai
World Journal of Gastroenterology , 2009,
Abstract: Midkine (MK) is a heparin-binding growth factor with its gene first identified in embryonal carcinoma cells at early stages of retinoic acid-induced differentiation. MK is frequently and highly expressed in a variety of human carcinomas. Furthermore, the blood MK level is frequently elevated with advance of human carcinomas, decreased after surgical removal of the tumors. Thus, it is expected to become a promising marker for evaluating the progress of carcinomas. There is mounting evidence that MK plays a significant role in carcinogenesis-related activities, such as proliferation, migration, anti-apoptosis, mitogenesis, transforming, and angiogenesis. In addition, siRNA and anti-sense oligonucleotides for MK have yielded great effects in anti-tumor activities. Therefore, MK appears to be a potential candidate molecular target of therapy for human carcinomas. In this paper, we review MK targeting at nucleoli in different tumor cells and its role in carcinogenesis to deepen our understanding of the mechanism of MK involved in carcinogenesis.
Infinite Dimensional Stochastic Differential Equations for Dyson's Model
Li-Cheng Tsai
Mathematics , 2014, DOI: 10.1007/s00440-015-0672-2
Abstract: In this paper we show the strong existence and the pathwise uniqueness of an infinite-dimensional Stochastic Differential Equation (SDE) corresponding to the bulk limit of Dyson's Brownian Motion (DBM), for all $\beta\geq 1$. Our construction applies to an explicit and general class of initial conditions, including the lattice configuration $\{x_i\}=\mathbb{Z}$ and the sine process. We further show the convergence of the finite to infinite-dimensional SDE. This convergence concludes the determinantal formula of Katori and Tanemura (2010) for the solution of this SDE at $\beta=2$.
Ferulic Acid, an Angelica sinensis-Derived Polyphenol, Slows the Progression of Membranous Nephropathy in a Mouse Model
Chao-Wen Cheng,Wen-Liang Chang,Li-Cheng Chang,Chia-Chao Wu,Yuh-Feng Lin,Jin-Shuen Chen
Evidence-Based Complementary and Alternative Medicine , 2012, DOI: 10.1155/2012/161235
Abstract: Membranous nephropathy (MN) is a leading cause of adult nephrotic syndrome but lacks adequate treatment. Different extracts of Angelica sinensis (AS) and one of its active compounds, ferulic acid (FA), were used to evaluate the therapeutic effects in a MN mouse model. The MN model was grouped into three subgroups: no treatment (N-T), treatment at induction of MN (Pre-T), and treatment after full-blown MN (Post-T). The results showed that the methanol (ME) layer of AS extract exhibited a therapeutic effect on MN-induced proteinuria. The ME layer-enriched compound, FA, improved the hypoalbuminemia, hyperlipidemia, and proteinuria in both Pre-T and Post-T groups. Ferulic acid also reduced the formation of oxidative protein products and increased the synthesis of antioxidant enzymes in groups Pre-T and Post-T. Regarding angiogenesis factors, the antiangiogenic factors in renal glomeruli were increased in group N-T, but, after FA treatment, only one of the antiangiogenic factors, thrombospondin-1, showed a significant decrease. Furthermore, the expression of Th2 predominant showed significant decrease in both Pre-T and Post-T groups when compared to that of N-T group. In summary, FA retarded the progression of MN, and the mechanisms involved the regulation of oxidative stresses, angiogenic and antiangiogenic factors, and attenuation of Th2 response.
KINETICS ANALYSIS OF NAPHTHENIC ACID CORROSION IN ATMOSPHERIC AND VACUUM EQUIPMENT
SRB对X70管线钢在污染土壤中腐蚀行为的影响

ZHAO Li-cheng,SUN Cheng,ZHANG Fu-bao,CAI Duo-chang,
赵力成
,孙成,张付宝,蔡铎昌

腐蚀科学与防护技术 , 2007,
Abstract: Corrosion behavior of X70 pipeline steel in polluted soil inoculated with and without SRB were studied by using polarization curve technique,electrochemical spectroscopy(EIS) and scanning electron microscopy(SEM).The results shown that the corrosion rate of X70 pipeline steel in polluted soil inoculated with SRB is larger than that without SRB.The EIS spectra exhibit single-capacitive loop model in polluted soils with and without SRB.The impedance of X70 pipeline steel in soil with SRB is smaller than those in soil without SRB.
Modeling Algorithm Based on String-coding Clone Selection and Reliability Forecasting
基于字符串编码克隆选择的建模算法及可靠性预测

ZHANG Wei,HU Chang-Hua,JIAO Li-Cheng,SHANG Rong-Hua,
张伟
,胡昌华,焦李成,尚荣华

自动化学报 , 2008,
Abstract: Modeling algorithm based on string-coding clone selection is put forward.In the algorithm,evolution and choice of function structure,arithmetic relation and parameters are completed in elementary function space with string-coding clone selection,therefore,automatic production of forecasting model structures and adaptive determination of forecasting model pa- rameters are realized.Design of string-coding makes it possi- ble to randomly produce an expression in elementary function space;clone selection strategy achieves evolutionary training of string-coding antibodies.Moreover,by design of clone operator to string-coding antibodies,different antibodies evolve coordi- nately,diversity of antibodies restrains"precocity"in evolution. Reliability forecasting model of the weapon system is built uisng the algorithm.Results of experiments show that the forecasting model is of high accuracy,and lays a foundation of reliability forecasting,fault forecasting and maintenance for the control system.
Advances in Gait Representation and Gait Fusion Methods
步态表征和步态融合方法新进展

CHEN Chang-hong,LIANG Ji-min,ZHAO Heng,JIAO Li-cheng,
陈昌红
,梁继民,赵恒,焦李成

计算机科学 , 2010,
Abstract: As one of the biometrics which can be perceived unobtrusively at a distance, gait recognition gets more and more attention. Efficient gait representation is critical for gait recognition and information fusion methods are important alternative to improve the performance of gait recognition. We summarized the recent advances in gait recognition from the viewpoint of gait representation and gait information fusion methods. We also summarized the latest gait representation methods in detail and sums up the gait information fusion methods from three categories: multi-feature fusion,multi-view fusion and multi-biometric fusion. Furthermore, the development trend of gait recognition was analyzed.
Specimens from Biopsies of Colorectal Polyps Often Harbor Additional Diagnoses
Shefali Chopra,Mark Li-cheng Wu
Pathology Research International , 2013, DOI: 10.1155/2013/570526
Abstract: Objectives. The utility of examining specimens from colorectal biopsies of polyps for nonneoplastic diseases is currently unknown. Our objectives were to characterize such additional diagnoses that could be rendered. Methods. We retrospectively and prospectively reviewed specimens from endoscopic biopsies of colorectal polyps obtained during routine screening or surveillance. Results. 17 of 168 specimens (10.1%) contained additional diagnoses, including schistosomiasis, eosinophilic colitis, intestinal spirochetosis, melanosis coli, and other entities. These findings were easily overlooked because they often affected mucosa that was spared by the polyps or were often evident only at high magnification. Schistosomiasis, eosinophilic colitis, and intestinal spirochetosis were clinically occult. Conclusions. Specimens from biopsies of colorectal polyps often harbor other diagnoses, in addition to polyps, and can be simultaneously screened for polyps and examined for nonneoplastic diseases. Detection of other diagnoses in addition to polyps requires awareness, examination at high magnification, and examination of areas spared by the polyps. 1. Introduction Specimens from endoscopic biopsies of putative colorectal lesions usually show traditional nonserrated adenomas, serrated polyps, or variants of normal mucosa. These entities generally are easily and rapidly diagnosed at low magnification. Consequently, pathologists are tempted to examine these specimens quickly and only at low magnification, to assume that these specimens will harbor only polyps or variants of normal mucosa, and to refrain from examining these specimens further at high magnification once polyps are diagnosed. Directed review of these specimens might reveal other diagnoses, in addition to polyps. Pathologists might overlook such second diagnoses for various reasons. However, such second diagnoses might be significant. We reviewed specimens from biopsies of colorectal polyps to characterize second diagnoses that could be rendered in this setting and to demonstrate that these specimens could be examined for nonneoplastic diseases. 2. Materials and Methods The study was approved by the Institutional Review Board of the University of California, Irvine, USA, on November 7, 2005 as protocol HS number: 2005-4646. The study was carried out in 2 phases. The first phase was designed to determine prevalence, and the second phase was designed to determine incidence. During the first phase, consecutive specimens from endoscopic colorectal biopsies of polyps accessioned at our institution during a
Weakly Asymmetric Non-Simple Exclusion Process and the Kardar-Parisi-Zhang Equation
Amir Dembo,Li-Cheng Tsai
Mathematics , 2013, DOI: 10.1007/s00220-015-2527-1
Abstract: We analyze a class of non-simple exclusion processes and the corresponding growth models by generalizing Gaertners Cole-Hopf transformation. We identify the main non-linearity and eliminate it by imposing a gradient type condition. For hopping range at most 3, using the generalized transformation, we prove the convergence of the exclusion process toward the Kardar-Parisi-Zhang (KPZ) equation. This is the first universality result concerning interacting particle systems in the context of KPZ universality class. While this class of exclusion processes are not explicitly solvable, we obtain the exact one-point limiting distribution for the step initial condition by using the previous result of Amir et al. (2011) and our convergence result.
Optimal Surviving Strategy for Drifted Brownian Motions with Absorption
Wenpin Tang,Li-Cheng Tsai
Mathematics , 2015,
Abstract: We study the 'Up the River' problem formulated by Aldous (2002), where a unit drift is distributed among a finite collection of Brownian particles on $ \mathbb{R}_+ $, which are annihilated once they reach the origin. Starting $ K $ particles at $ x=1 $, we prove a conjecture of Aldous (2002) that the 'push-the-laggard' strategy of distributing the drift asymptotically (as $ K\to\infty $) maximizes the total number of surviving particles, with approximately $ \frac{4}{\sqrt{\pi}} K^{1/2} $ surviving particles. We further establish the hydrodynamic limit of the particle density, in terms of a two-phase PDE with a moving boundary, by utilizing certain integral identities and coupling techniques.
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