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A novel design of vehicle intake system detection based-on hot-film air flow meter sensors
Rong-Hua Ma
Journal of Engineering and Applied Sciences , 2011,
Abstract: The goal of this study is to develop an airflow meter sensor for vehicle intake system detection. The study uses micro-electromechanical process technology to develop a hot-film flow meter with an alumina substrate and platinum film heater; the hotline method is used to create a micro airflow meter sensor relying on variations in resistance of the platinum film corresponding to different wind velocity at the set temperatures. The micro-sensor is less bulky and has a simpler structure than ordinary meters, and its small size enables it to provide good sensitivity and measurement precision. The alumina plate used in this study is produced by polishing an alumina substrate, and cutting the substrate to the needed size; a platinum film is then deposited on the plate to complete the micro-heater used in the sensor. The plate is then cut again to the required size. The design is also employed to fabricate single chip and double chip sensors. Resistance on the sensor side varies as gas flows through the sensor, and the instrument determines airflow velocity on the basis of the changes in resistance caused by gas flow differences. Airflow velocity of 10 m/s, 20 m/s, 30 m/s, 40 m/s, 50 m/s, and 60 m/s are used to experimentally test the sensor. Resistance displays a regular slope, indicating that the sensor can achieve its airflow velocity measurement purpose. The relationship between changes in airflow velocity and readings remain predictable throughout the sensing range. This study also varied parameters including resistance, size, direction, interval, and angle, etc. to observe the effect on sensing characteristics, and determine the best sensing model on this basis.
Some Results for the Family KKM(X,Y) and the Φ-Mapping in FC-Spaces
Rong-Hua He
ISRN Applied Mathematics , 2011, DOI: 10.5402/2011/696917
Abstract:
Fixed Points and Existence Theorems of Maximal Elements with Applications in FC-Spaces
Rong-Hua He
ISRN Applied Mathematics , 2011, DOI: 10.5402/2011/673591
Abstract:
Dynamic Detection on Airflow for Vehicle Intake System Based-on Hot-Film Anemometry Sensors  [PDF]
Rong-Hua Ma, Tsung-Sheng Sheu
Journal of Transportation Technologies (JTTs) , 2011, DOI: 10.4236/jtts.2011.11001
Abstract: The goal of this study is to develop an airflow meter sensor for vehicle intake system detection in internal combustion engines. The study uses micro-electromechanical process technology to develop a hot-film flow meter with an alumina substrate and platinum film heater; the hotline method is used to create a micro airflow anemometry meter sensor relying on variations in resistance of the platinum film corresponding to different wind velocity at the set temperatures. The micro-sensor is less bulky and simpler structure than ordinary meters, and its small size enables it to provide good sensitivity and measurement precision. The alumina plate used in this study is produced by polishing an alumina substrate, a platinum film is then deposited on the plate to complete the micro-heater used in the sensor. Resistance on the sensor side varies as gas flows through the sensor, and the instrument determines airflow velocity on the basis of the changes in resistance caused by gas flow differences. Airflow velocity form 10 m/s to 60 m/s are used to test. Resistance displays a regular slope, indicating the relationship between airflow velocities varies remain predictable throughout the sensing range. Therefore, the sensor can achieve its airflow measurement purpose completely.
The Expression of NF-κB in the Glomerulus of Hyperlipidemia Rats  [PDF]
Xuan Li, Rong-Hua Yan, Jin Peng
International Journal of Clinical Medicine (IJCM) , 2011, DOI: 10.4236/ijcm.2011.21001
Abstract: Background: The present study was to explore the underlying mechanism of the nuclear factor-kappa B (NF-κB) and the level of monocyte chemoattractant protein-1 (MCP-1) in hyperlipidemia rats. Methods: Rats were given with high fat diet and vitamin D3 by intragastric administration. After four weeks, the level of the plasma cholesterol, low density lipoprotein cholesterol (LDLC), MCP-1 and NF-κB were detected by immunohistochemical method and enzyme linked immunosorbent assay (ELISA). Results: The levels of the plasma cholesterol and LDLC were higher than that of the control group. A significant in-crease for the expressions of MCP-1 and NF-κB was observed. Conclusion: This indi-cated that the activation of NF-κB could play a crucial role in glomerulus of hyperlipidemia rats.
Increased Locomotor Activity and Non-Selective Attention and Impaired Learning Ability in SD Rats after Lentiviral Vector-Mediated RNA Interference of Homer 1a in the Brain
Qin Hong, Lei Yang, Min Zhang, Xiao-Qin Pan, Mei Guo, Li Fei, Mei-Ling Tong, Rong-Hua Chen, Xi-Rong Guo, Xia Chi
International Journal of Medical Sciences , 2013,
Abstract: Our previous studies found that Homer 1a, a scaffolding protein localized at the post-synaptic density (PSD) of glutamatergic excitatory synapses, is significantly down-regulated in the brain of spontaneous hypertensive rats (SHR), an animal model of attention deficit hyperactivity disorder (ADHD). Furthermore, a first-line treatment drug for ADHD, methylphenidate, can up-regulate the expression of Homer 1a. To investigate the possible role of Homer 1a in the etiology and pathogenesis of ADHD, a lentiviral vector containing miRNA specific for Homer 1a was constructed in this study. Intracerebroventricular injection of this vector into the brain of Sprague Dawley (SD) rats significantly decreased Homer 1a mRNA and protein expression levels. Compared to their negative controls, these rats displayed a range of abnormal behaviors, including increased locomotor activity and non-selective attention and impaired learning ability. Our results indicated that Homer 1a down-regulation results in deficits in control over behavioral output and learning similar to ADHD.
Key Distribution Scheme in Designated Manually Deployed Wireless Sensor Networks Based on One-way Hash Chain
基于单向散列链的定点布设无线传感器网络密钥分配方案

QIN Rong-hua,HE Liang-ming,LI Bao-qing,YUAN Xiao-bing,
覃荣华
,何亮明,李宝清,袁晓兵

计算机科学 , 2013,
Abstract: Aiming at the case of manually deployed wireless sensor networks(WSNs) , we introduced a key distribution scheme based on one-way hash chain. By employing the mechanism of key chain partly activation,our scheme can effectively weaken the threat of node capture, be resilience against node replication or node forgery. Besides of good security properties, the scheme supports node redeployment and promises good network coverage rate.
The bistable state of a nematic liquid crystal cell with surface order-electricity polarization and flexoelectric polarization at saturation point
表面序电极化、挠曲电极化与向列液晶盒饱和点的双稳态

Guan Rong-Hua,
关荣华

物理学报 , 2011,
Abstract: Using both numerical simulations and an analytical theory we study the influence of the surface order-electricity polarization and flexoelectric polarization on the bistable state of a non-xymmetric weak anchoring nematic liquid crystal cell at saturation point.The equilibrium equation and boundary condition of the director have been obtained when surface order-electricity polarization and flexoelectric polarization coexistence. By adopting a new state parameter, the physical effects caused by the two polarizations have been discussed from the energy point of view. The results show that the bistable state can be induced under certain condition and by changing the anchoring energy at saturation point. The condition for the bistable state existence is deduced and it accord well with the numerical results.
Model Evidence for Interdecadal Pathway Changes in the Subtropics and Tropics of the South Pacific Ocean

ZHANG Rong-Hua,WANG Zhanggui,

大气科学进展 , 2013,
Abstract: Numerical simulations using a version of the GFDL/NOAA Modular Ocean Model (MOM 3) are analyzed to demonstrate interdecadal pathway changes from the subtropics to the tropics in the South Pacific Ocean. After the 1976–77 climate shift, the subtropical gyre of the South Pacific underwent significant changes, characterized by a slowing down in its circulation and a southward displacement of its center by about 5°–10° latitude on the western side. The associated circulation altered its flow path in the northwestern part of the subtropical gyre, changing from a direct pathway connecting the subtropics to the tropics before the shift to a more zonal one after. This effectively prevented some subtropical waters from directly entering into the western equatorial Pacific. Since waters transported onto the equator around the subtropical gyre are saline and warm, such changes in the direct pathway and the associated reduction in equatorward exchange from the subtropics to the tropics affected water mass properties downstream in the western equatorial Pacific, causing persisted freshening and cooling of subsurface water as observed after the late 1970s. Previously, changes in gyre strength and advection of temperature anomalies have been invoked as mechanisms for linking the subtropics and tropics on interdecadal time scales. Here we present an additional hypothesis in which geographic shifts in the gyre structure and location (a pathway change) could play a similar role.
Multi-Wavelength Laser Atmospheric Extinction Correlativity and Real-time Inversion Computation Study
多波长激光的大气消光系数相关性及实时反演计算研究

WU Rong-hua,
吴荣华

红外与毫米波学报 , 2009,
Abstract: The correlativity of extinction coefficients at different wavelengths was get by Mie scattering theory and the laser multipoint fault measuring techniques. The extinction coefficient at the wavelength of 1.06um was measured with the laser remote sensing back scattering hazemeter produced by ourselves. Then the extinction coefficients at the wavelength of 0.532um, 0.86um, 1.57um and 3.47um were inversely calculated real-timely with the correlativity of extinction coefficients at different wavelengths and were compared with the practical extinction coefficient at the wavelength of 0.532um. The results showed that it is feasible to inversely calculate the infrared atmospheric propagation and establish the infrared radiation real-time atmospheric propagation correcting model with the correlativity of extinction coefficients at different wavelengths.
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