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Search Results: 1 - 10 of 367456 matches for " 王明 "
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以IR及UV法监测阿法骨化醇合成反应进程
A Method for Monitoring the Process of Synthetic Reaction of Alfacalcidol by IR and UV
 [PDF]

,
Hans Journal of Medicinal Chemistry (HJMCe) , 2013, DOI: 10.12677/HJMCe.2013.12003
Abstract:

目的:成阿法骨化醇,准确监测反应进程并判定反应终点。方法:IRUV法监测阿法骨化醇合成反应进程。结果:IRUV法能准确有效的监测阿法骨化醇合成反应进程,避免了反应不完全或过度反应导致副产物增加的弊端,提高了反应收率,且重现性好,收率稳定。结论:本方法操作简单、迅速、准确、有效,适合于工业化生产。
Objective: This paper is about synthetizing alfacalcidol, monitoring the reaction process and determining the end of the reaction. Method: Monitoring the process of the synthetic reaction of alfacalcidol by IR and UV. Results: This is an effective method to monitor the synthesis process and avoid the incomplete reaction or the overreaction, which can lead to the increase of the side product. Furthermore, the method increases the yield of the reaction and improves the good reproducibility. The yield is stable. Conclusion: The method is easy, rapid and accurate. It is suitable for the pharmaceutical manufacture.

新生儿呼吸窘迫综合征的防治进展
Advantage of Prevention and Treatment in Neonatal Respiratory Distress Syndrome
 [PDF]

张立,
Asian Case Reports in Pediatrics (ACRP) , 2013, DOI: 10.12677/ACRP.2013.11003
Abstract: 一般认为,新生儿呼吸窘迫综合征(Neonatal respiratory distress syndrome, NRDS)是由于肺表面活性物质缺乏所致,近年研究认为NRDS的发病与胎龄、出生体重、窒息、剖宫产、感染、产前应用肾上腺皮质激素、糖尿病母亲、宫内慢性缺氧等多种因素有关。为了预防NRDS的发生,产前可给产妇应用糖皮质激素、氨溴索等药物,出生后可尽早给予大剂量氨溴索、肺表面活性物质(Pulmonary surfactant, PS)、持续呼吸道正压通气(Continuous positive air-way pressure, CPAP)、高频震荡通气(High-frequency oscillatory ventilation, HFOV)、吸入一氧化氮、液态通气及体外膜肺治疗以阻止病情的进展。
Neonatal respiratory distress syndrome (NRDS) is caused by deficiency of pulmonary surfactant (PS) in premature infants generally. But it is associated with gestational age, birthweight, asphyxia, caesarean birth, infection, use dexamethasone to mother before delivery, diabetic mother and fetus intrauterine hypoxia. Treated with ambroxol and dexamethasone to maternity before delivery may prevent the NRDS. High dose ambroxol, PS, continuous positive air-way pressure, high-frequency oscillatory ventilation, inhaled NO, liquid ventilation and extracorporeal membrane oxygenation may be used earlier to newborns after birth to avoid aggravation of the disease.
中国海洋药物发展的几点思考
The Thinking of Development of Chinese Marine Medicine
 [PDF]


Pharmacy Information (PI) , 2013, DOI: 10.12677/PI.2013.22003
Abstract:
本文提出了目前我国在海洋药物发展中出现的问题及对策,并对我国海洋药物研究作了展望。
This paper comes up with the problems and countermeasures on the development of Chinese marine medi-cine currently, and prospects the research of our marine medicine.
Summingbird云计算平台在能源互联网中的应用
The Application of Summingbird Cloud Computing Platform in Energy Internet
 [PDF]

刘志坚,
Computer Science and Application (CSA) , 2015, DOI: 10.12677/CSA.2015.512058
Abstract: 本文针对云计算技术在能源互联网的实际应用进行分析,首先介绍了国内外关于能源互联网的理论和实践工作,其次总结能源互联网中的数据类型及来源,并提出以Summingbird实时数据处理平台为能源互联网的云计算平台,然后分析了利用Summingbird平台可行性和优势,最后提出了“一网两云”的基于云计算技术的信息系统构架方案,望云计算平台在能源互联网发展中起到重要作用。
This text analyzes the practical application of the cloud computing on the energy internet. Firstly, the relative theory and practice works are introduced in domestic and overseas. Secondly, this paper summarizes possible data types and its source, and then presents using the Summingbird real-time data processing platform as the cloud computing platform of Energy Internet, meanwhile the feasibility and superiority of Summingbird are discussed. Finally the topological structure named “Energy Internet and two Cloud Computing platforms” (EI & TC), which is an information system framework based on the cloud computing, is presented. Hoping the cloud computing platform will play an important role in the developing of Energy Internet.
通用的定日镜准确方位–俯仰跟踪公式及其应用研究
Study on the General Accurate Azimuth-Elevation Tracking Angle Formula for Heliostat and Its Applications
 [PDF]

, 志峰
Advances in Energy and Power Engineering (AEPE) , 2015, DOI: 10.12677/AEPE.2015.35019
Abstract:
本文针对应用最为广泛的方位–俯仰双轴跟踪定日镜,推导出了“含镜面偏心距和其它6个典型几何误差参数的准确方位–俯仰跟踪公式”,建立了由跟踪实验数据反求定日镜的6个典型角度跟踪参数的非线性最小二乘法数学模型,并给出了2个实用的求解算法。专门设计了一个定日镜模型,并借助三维坐标机的光学测试平台,做了多组室内的激光束方位–俯仰跟踪实验。实验结果很好地验证了跟踪角度公式和估计定日镜的6个典型角度误差参数的方法。该通用的准确方位–俯仰跟踪公式,可有效补偿如定日镜的立柱倾斜、两个旋转轴的非正交等系统误差。定日镜准确跟踪公式,已成功应用于北京八达岭1 MW塔式太阳能热发电站(DAHAN电站)的100台定日镜中。
With respect to the widely used azimuth-elevation dual axis tracking heliostats, this paper gives the accurate azimuth-elevation tracking angle formula for a heliostat with a mirror-pivot offset and other six typical geometric error parameters. A nonlinear least-squares mathematical model is es-tablished to solve the six typical angular tracking parameters of the azimuth-elevation tracking he-liostat based on experimental tracking data, and also gives the two practical numerical solution al-gorithms. We specially designed a heliostat model and with the help of optical test platform of 3D coordinate measuring machine conducted the indoor laser beam azimuth-elevation tracking expe-riments. The experimental results validated the general tracking angle formula and the method for estimating the six typical angle error parameters of an azimuth-elevation tracking heliostat. This general accurate azimuth-elevation tracking angle formula can effectively compensate the heliostat pedestal tilt, the initial angle biases of the two rotational axes and the non orthogonal angle error of the two axes and so on. This tracking angle formula has been successfully applied to the 100 helios-tats in Badaling 1 MW solar thermal tower power plant (DAHAN solar power plant) in Beijing, China.
国家示范区现代化大农业发展指标体系评价
Index System Evaluation of Modern Mega-Agriculture Development in National Demonstration Zone
 [PDF]

, 树锋
Advances in Social Sciences (ASS) , 2016, DOI: 10.12677/ASS.2016.51013
Abstract:
黑龙江农垦作为国家树立的现代化大农业示范区,其现代化大农业影响因素和发展水平评价指标体系对全国评价现代农业具有重要的应用参考价值。为此,采用经验判断、逻辑推理和因子分析等方法,归纳总结了影响现代化大农业发展的四大类共20个要素,构建了衡量现代化大农业发展水平的评价指标体系,选取直接相关的10个重要指标,运用SPSS软件对其进行因子分析,并据以对示范区现代化大农业发展要素进行排序:农业科技贡献率和有效灌溉面积是影响示范区现代化化大农业发展的首要因素,农机总动力、农业机械化率和粮食商品化率是重要支撑要素,耕地规模、农民收入、能源和农业服务则是现代化大农业赖以发展的基础。
Heilongjiang Nongken as the demonstration zone that the country set for modern mega-agricul- ture, its influence factors of modern mega-agriculture and development level evaluation index system have important reference value to the evaluation of national modern mega-agriculture. To this end, using empirical analysis, logical reasoning and factor analysis and other methods, this paper summarizes four types of 20 elements totally influencing modern mega-agriculture devel-opment, constructs a evaluation index system for measuring development level of modern mega- agriculture, selects 10 related important indicators, uses SPSS software to carry on the factor analysis, and according to the results sorts the development elements of modern mega-agriculture. The contribution rate of agricultural science and technology and the effective irrigation area are the main factors that affect the modern mega-agriculture development in the demonstration zone. Agriculture machine power, agricultural mechanization rate and grain commercialization rate are important supporting elements. The size of arable land, farmers’ income, energy and agricultural service are the basis for the development of modern mega-agriculture.
体感运动在“宅”时代应用的可行性分析
Feasibility Analysis of Motion Sports in “Zhai” Times
 [PDF]

刘坤,
Advances in Physical Sciences (APS) , 2016, DOI: 10.12677/APS.2016.41002
Abstract:
本论文运用文献资料法、逻辑分析法、专家访谈法和问卷调查法对体感运动这一新兴的运动项目在“宅”时代的应用进行分析和研究,从当代社会的实际出发,采用体育运动特色与社会需求相结合的思路,意在通过调查研究,让人们认识到体感运动的优越性和创新性,力求用一种新的方式促使“宅”族脱身并积极参加运动锻炼。
This article analyzes and researches the use of motion sports, a kind of emerging sports, by me-thod of documentary, logical analysis, expert interview method and questionnaire method in “Zhai” times. The aim of this article is to encourage people to do sports by making them realize superiority and innovation of motion sports based on researches and social practice in method of combining characteristics of sports and social needs.
基于FPGA的相位同步快速算法研究与设计
Study and Design of Fast Synchronization in Phase Based on FPGA
 [PDF]

, 郑恭
Journal of Sensor Technology and Application (JSTA) , 2016, DOI: 10.12677/JSTA.2016.42010
Abstract: 为实现同步系统中的信号相位同步,设计了一种基于FPGA的相位同步快速算法。在恒温晶振高精度低温漂的基础上,进一步实时测量恒温晶振频率,矫正后提供系统时钟,采用Verilog语言,算法中利用输入信号实时监听系统,使用的滑动平均滤波法,进一步使误差降低到5 ns。实验结果表明:结合FPGA的高速度,恒温晶振的高精度,该算法可以快速的精确的实现信号快速同步。此算法已在北斗/GPS授时同步系统中应用成功。
To achieve signal synchronization in synchronism system, an algorithm based on FPGA was de-signed to do it. On the basis of oscillator with high precision and temperature offset, further, the system measures its real-time frequency, then provides system with correctional clock. The utili-zation of glide average method and Real time monitoring system in algorithm in Verilog make error decrease to 5 ns. The experiment shows that: with the high speed of FPGA and the high precision of crystal oscillator, the algorithm makes signal synchronization quickly as well as accurately. The algorithm is applied to BeiDou and GPS synchronized clock system successfully.
大孔径超长定向钻孔综合瓦斯抽采技术研究

煤炭工程 , 2011,
Abstract: 为解决沙曲煤矿综采工作面上隅角和回风流中瓦斯浓度经常超限问题,结合从德国引进的长距离大孔径定向钻机,在14205工作面试验了顶板岩层千米定向长钻孔抽采邻近层瓦斯与本煤层长钻孔瓦斯抽采相结合的综合瓦斯抽采方法,为瓦斯抽采提供新的技术途径。结果表明,大孔径定向长钻孔综合瓦斯抽放技术效果明显,顶板岩石水平长钻孔抽采浓度在60%以上,平均抽采量达13.3m3/min,本煤层长钻孔单孔瓦斯抽采浓度达15%左右,钻孔控制区域瓦斯预抽率达到35%左右,有效解决上隅角和回风流瓦斯超限问题,实现高瓦斯工作面安全高效开采。
连铸中间包水口吹氩对堵塞的影响数值模拟
Numerical Simulation of Influence of Argon Flowrate on Tundish Nozzle Clogging during Continuous Casting
 [PDF]

袁方, 新华, 张炯, 张立
International Journal of Fluid Dynamics (IJFD) , 2014, DOI: 10.12677/IJFD.2014.24009
Abstract:
本文采用数值模拟方法,对水口吹氩量和水口开度影响水口沉积速率的规律作了分析研究。结果表明,吹氩量对水口内的压力存在较大的影响,压力在滑动水口处存在突降。使水口滑板处保持正压的吹氩量随着开度的减小而增大。水口开度从66.45%减小至42.82%时,使水口滑板处保持正压的吹氩量从10 L?min?1增加至25~30 L?min?1。吹氩量对水口内沉积速率的影响规律与滑板开度有关。大开度时,较小吹氩量2.5~5 L?min?1可以使沉积速率降至最低,但随着吹氩量进一步增大时,沉积速率反而增加,至最大值后再次下降。小开度时,随着吹氩量的增加,沉积速率均为下降趋势,但吹氩量大于15~20 L?min?1以后,增大吹氩量对降低沉积速率的效果并不明显。综合考虑吹气量对水口内压力和对沉积速率的影响,大开度下(>60%)合适的吹气量应为10 L?min?1。考虑大吹气量带来的危害,小开度下(<60%)合适的吹气量应为15~20 L?min?1
Influence of argon flowrate and slide gate opening ratio on deposition rate was researched by the method of numerical simulation. Flowrate of argon had influence markedly upon pressure in the nozzle, and the pressure dropped suddenly after molten steel flowing through the slide gate. To keep positive pressure at slide gate for avoiding inspiration of air, minimum flowrate of argon was increased from about 10 L?min?1 to 25~30 L?min?1 as slide gate opening ratio decreasing from 66.45%to 42.82% when casting speed was 1.2 m?min?1. Influence of argon flowrate on the deposition rate of alumina was related to the slide gate opening ratio. When the slide gate opening ratio was big, such as 66.45%, the deposition rate of alumina occurred maximum and minimum values as the argon flowrate increased step by step. When the opening ratio was small, such as 50.46% and 42.82%, the deposition rate of alumina was decreased all along as the argon flowrate increased, and the effect of argon flowrate on decreasing alumina deposition rate was not obvious when the argon flowrate was more than 15~20 L?min?1. Considering the influence of flowrate upon to static pressure in nozzle and deposition rate, the appropriate argon flowrate was 10 L?min?1 as big opening ratio of slide gate (>60%). Due to the disadvantage of high flowrate, the appropriate argon flowrate was 15~20 L?min?1 as small opening ratio (<60%).
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