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Search Results: 1 - 10 of 20505 matches for " Qian Du "
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MS-HRM to Detect Serum DNA Methylation of Intrauterine Growth Retardation Children  [PDF]
Yan Du, Youxia Zhou, Qian Wu
Engineering (ENG) , 2012, DOI: 10.4236/eng.2012.410B027
Intrauterine growth retardation (IUGR) is also called fetal growth restriction (FGR), which is the major complications in obstetrics and one of the most important causation from high morbidity and mortality in perinatal. In this study, MS-HRM (Methylation-Sensitive High Resolution Melting Curve Analysis) was used to detect the methylation status of serum DNA. Gene of insulin-like growth factor binding protein 3 (IGFBP-3) was detected in this study. Results showed that the serum DNA methylation level of FGR fetus were lower than that of the control group; different methylation levels were also found between male and female fetus; and the methylation level was increased with the birth weight of the newborn. Our results showed that the IGFBP-3 gene methylation level of serum DNA of newborn could be semi-quantitative detected which guide the early prevention and treatment of IUGR. It also indicated that the methylation status of serum DNA can be conveniently identified and quantified by inspection of the melting curves.
Two new species of genus Rhopalopsole (Insecta, Plecoptera, Leuctridae) from China
Qian Yuhan,Du Yuzhou
ZooKeys , 2011, DOI: 10.3897/zookeys.154.2234
Abstract: Two new species of Rhopalopsole Klapálek from China are described: R. exiguspina Du & Qian, sp. n. and R. ampulla Du & Qian, sp. n., which were collected in Guizhou province, China.
Robots Learn Writing
Huan Tan,Qian Du,Na Wu
Journal of Robotics , 2012, DOI: 10.1155/2012/505191
Abstract: This paper proposes a general method for robots to learn motions and corresponding semantic knowledge simultaneously. A modified ISOMAP algorithm is used to convert the sampled 6D vectors of joint angles into 2D trajectories, and the required movements for writing numbers are learned from this modified ISOMAP-based model. Using this algorithm, the knowledge models are established. Learned motion and knowledge models are stored in a 2D latent space. Gaussian Process (GP) method is used to model and represent these models. Practical experiments are carried out on a humanoid robot, named ISAC, to learn the semantic representations of numbers and the movements of writing numbers through imitation and to verify the effectiveness of this framework. This framework is applied into training a humanoid robot, named ISAC. At the learning stage, ISAC not only learns the dynamics of the movement required to write the numbers, but also learns the semantic meaning of the numbers which are related to the writing movements from the same data set. Given speech commands, ISAC recognizes the words and generated corresponding motion trajectories to write the numbers. This imitation learning method is implemented on a cognitive architecture to provide robust cognitive information processing. 1. Introduction Robots are expected to generate human-like behaviors in dynamic environments [1, 2]. However, it is very difficult for robots to develop skills or behaviors totally from scratch without any initial knowledge. As stated in Sloman’s paper, robots should learn both altricial and precocial behaviors after their “birth” [3]. Therefore, it is reasonable that robots have some basic and simple initial knowledge with motion primitives [4], or some basic and simple initial skills to explore the world to develop new knowledge and skills to survive or complete tasks. Upon these initial knowledge and skills, humans can teach robots more complex behaviors or skills to complete much more complex tasks. Imitation learning (also called learning from demonstration, programming by demonstration) is now considered as a powerful tool for transferring skills between robots (especially humanoid robots) [5]. Unlike the traditional teaching-executing mode, where robots simply record the trajectory programmed by human operators and move the angles and end effector along the trajectory, since 1970s, the researchers had tried to train robots to learn simple motion patterns [6]. In 1980s, Atkeson trained a robot to learn how to balance an inverted pendulum in an upright position through practice [7].
Effect of a Comprehensive Health Education Program to Increase Physical Activity among Primary School Students in China  [PDF]
Ling Qian, Lok-Wa Yuen, Yonghua Feng, Ian M. Newman, Duane F. Shell, Weijing Du
Advances in Physical Education (APE) , 2018, DOI: 10.4236/ape.2018.82018
Abstract: China’s National Physical Fitness and Health Surveillance (NPFHS) survey revealed high levels of sedentary behavior among primary school-aged children. Sedentary behavior is linked to both short-term and long-term physical and mental health conditions. A comprehensive school health education program was designedand its effectiveness to raise physical activity levels in Grade 4 primary school children was evaluated. Twelve schools (6?of?program, 6?of?control) from six cities in two economically different provinces were selected. Students at program schools received physical activity instruction both in and out of school. Control schools carried on with their usual level of physical activity for students, as required by national educational standards. Program effectiveness was assessed by comparing students’ physical activity behaviors at pre- and post-program, and by comparing students’ physical activity scores at program schools with students’ scores at control schools. The pre-program survey of students’ behaviors was done at the end of Grade 3, and the post-program survey was done at the end of Grade 4. Multi-level modeling was used to evaluate program effectiveness to allow for missing data.Results from 4472 students showed at pre-program there was no difference in control and program schools’ student physical activity scores. At post-program students in program schools did significantly more physical activity compared to students in control schools. Students in program schools were more physically active after the comprehensive school health education program.A school-based comprehensive health education program would effectively increase childrens physical activity level in China. There is a potential to reduce sedentary behavior among children by implementing school programs that are environmental in nature; that is, activities involve not only the students,?but also the school administration, teachers, parents, and community?members.
Effects of Mitochondrial DNA Deletion and OSW-1 on PI3K-AKT Signaling Pathway PCR Array in SK-Hep1 Cells  [PDF]
Xichen Du, Changshi Qian, Xinglin Jin
Chinese Medicine (CM) , 2019, DOI: 10.4236/cm.2019.103006
Abstract: To investigate the effect of mitochondrial DNA deletion and OSW-1 on PI3K-AKT signaling pathway PCR Array in SK-Hep1 hepatocellular carcinoma cells, we prepared SK-Hep1 cells with mtDNA deletion, that is, p0SK Hep. Then the OSW-1 of 100 ng/L was used to intervene SK-Hep1 and p0SK-Hep1. RT-qPCR was used to detect the difference of gene expression on PI3K-AKT signaling pathway PCR Array in four groups of cells. The gene expression of TLR4, FOS and TSC2 markers in SK-Hep1 cells treated with OSW-1 were significantly increased. The gene expressions of PDPK1, GJA1, TLR4 and TSC2 markers were significantly increased in p0SK-Hep1 cells, and the gene expressions of IRAK1 and GJA1 markers were significantly increased in p0SK-Hep1 cells
Spatial and Temporal Variations in Available Soil Nitrogen—A Case Study in Kobresia Alpine Meadow in the Qinghai-Tibetan Plateau, China  [PDF]
Li Lin, Guangmin Cao, Fawei Zhang, Xun Ke, Yikang Li, Xingliang Xu, Qian Li, Xiaowei Guo, Bo Fan, Yangong Du
Journal of Geoscience and Environment Protection (GEP) , 2019, DOI: 10.4236/gep.2019.73010
Abstract: Elucidating the factors that determine the effects of temporal and spatial variation of nutrients is important for analyzing the characteristics of an ecosystem. The goal of this paper was to estimate how values obtained using a particular sampling approach correlated with the actual data for an entire plot. The mesh partition method was employed to divide an integrated observing field (IOF) located at the Haibei National Field Research Station of an alpine grassland ecosystem, China, into 25 subplots. Five of the 25 subplots were randomly selected for soil sampling and to determine the source of variations in soil nutrient content from 2001 to 2012. The results showed that, contributions of temporal and spatial variation in available nitrogen in the 0 - 10 cm soil layer accounted for 47.3% and 52.7%, respectively. The contribution of spatial variance was higher than that of temporal variance especially in the surface soil layers. The available soil nitrogen content in the alpine meadow was not obviously affected by fluctuations in rainfall and temperature. Increasing the number of samples could reduce calculation errors in measuring available soil nitrogen content, while collecting a reasonable number of samples can save time and labor.

Jing Yi Du Qian,

现代图书情报技术 , 1996,
Abstract: The article introduces the process of making the PALIS,The multimedia t echniques used in PALIS and the configuration of hardware and software.
Changes of citrus climate risk in subtropics of China

DUAN Hailai,QIAN Huaisui,LI Mingxia,DU Yaodong,

地理学报 , 2010,
Abstract: Based on the citrus temperature, precipitation, sunlight and climate risk degree, the article divides subtropics of China into three types: the low risk region, the moderate risk region and the high risk region. The citrus temperature risk increases with increasing latitude (except for the western mountainous area of subtropics of China). The citrus precipitation risk in the central part of subtropics of China is higher than that in the northern and western parts. The distributions of citrus sunlight risk are not consistent to those of the citrus precipitation risk. The citrus climate risk is mainly influenced by temperature. There is latitudinal zonal law for the distribution of the climate risk, that is, the climate risk increases with increasing latitude. At the same time the climate risk in mountainous area is high and that in eastern plain area is low. There are differences in the temporal and spatial changes of the citrus climate. In recent 46 years, the citrus climate risk presents a gradual increasing trend in subtropics of China, especially it has been increasing fast since the 1980s. Because of the global warming, the low risk region in the eastern and southern parts has a gradual decreasing trend, however, the high risk region in the northern and western parts has an increasing trend and the high risk region has been extending eastward and southward. The article analyses the distribution of the citrus climate risk degree of reduction rates of >10%, >20% and >30% in subtropics of China, and studies their changes in different time periods. Results show that the risk is increasing from southeast to northwest.
4,4′-Methylenedianilinium bis(3-carboxy-4-hydroxybenzenesulfonate) monohydrate
Guihuan Du,Zuli Liu*,Qian Chu,Zhen Li
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808029115
Abstract: Co-crystallization of 4,4′-methylenediphenylamine (MDA) and 5-sulfosalicylic acid (5-H2SSA) yields the title salt, C13H16N22+·2C7H5O6S ·H2O. The asymmetric unit is comprised of one dication, two anions and one water molecule. In the crystal structure, the components of the salt are linked by a combination of intermolecular O—H...O, N—H...O and weak C—H...O hydrogen bonds into a three-dimensional framework. In addition, two weak π–π interactions [with centroid–centroid distances of 3.8734 (15) and 3.7465 (15) ] and one C—H...π interaction further stabilize the crystal structure.
Bis(4-methylimidazolium) succinate succinic acid solvate
Guihuan Du,Zuli Liu,Qian Chu,Zhen Li
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809006205
Abstract: In the title compound, 2C4H7N2+·C4H4O42 ·C4H6O4, the asymmetric unit consists of two 4-methylimidazolium cations, one succinate dianion and one netrual succinic acid molecule and within the latter components, the C—O, C=O and C...;O bonds are clearly evidenced from their relative distances. In the crystal structure, the individual components are linked by intermolecular N—H...O, O—H...O and C—H...O hydrogen bonds into a two-dimensional network parallel to the (101) plane in which R33(9), R33(12) and R44(18) hydrogen-bond motifs are present.
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