oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 8 )

2018 ( 266 )

2017 ( 236 )

2016 ( 267 )

Custom range...

Search Results: 1 - 10 of 8827 matches for " "
All listed articles are free for downloading (OA Articles)
Page 1 /8827
Display every page Item
提高自钻式锚杆抗拔力的技术措施
Technical Measures of Improving Self-Drilling Anchor Pullout Resistance
 [PDF]

冯小
Hans Journal of Civil Engineering (HJCE) , 2013, DOI: 10.12677/HJCE.2013.21012
Abstract:
由于受地层条件等诸因素的影响,自钻式锚杆抗拔力达不到设计要求的情况时有出现。如何提高自钻式锚杆抗拔力是采用自钻式锚杆支护时必须考虑的一个重要问题。以承德钢厂烧结机改造工程5#边坡(VK0 + 226.94-K0 + 270.64)支护为例,介绍了影响自钻式锚杆抗拔力的因素,主要从钻进成孔工艺、清孔方法、钻进技术参数选择、注浆控制等方面论述了提高自钻式锚杆抗拔力的技术措施。
Due to the influence of the geological conditions and other factors, pullout resistance of self-drilling anchor can’t achieve the design requirements appearing from time to time. How to improve the self-drilling anchor pullout resistance is an important question that must be considered in the self-drilling anchor supporting. Take Chengde Steel sintering machine renovation project of No.5 slope (VK0 + 226.94-K0 + 270.64) supporting as an example, describing the factors that affecting the self-drilling anchor pullout resistance, discussing technical measures to improve the self- drilling anchor pullout resistance mainly from drilling into the hole process, hole cleaning method, drilling technology parameter selection, grouting control and so on.
论医疗全行业业务流程重组
View of BPR of the Whole Medical Profession
 [PDF]

李少
Service Science and Management (SSEM) , 2013, DOI: 10.12677/SSEM.2013.22011
Abstract:

本文在介绍了医疗行业资源重组实践进展的基础上,第一次提出了医疗全行业业务流程重组概念以及目标、原则,分析了医疗全行业业务流程重组的现实条件,提出了医疗全行业业务流程重组的路径、制度设计和保障措施,提出了居民就诊全流程设计思路,明确建立家庭医生制度和双向转诊制度、分级医疗制度等。分析了医疗全行业实施低成本战略的可能性。
In this thesis, based on the introduction of study among practice in resources of the medical profession, the concept, aims and principles of BPR of the whole medical profession are first raised in China, and the current conditions of BPR of the whole medical profession BPR are analyzed; Secondly, the path, systems design and guarantee measures of BPR of the whole medical profession are raised; Thirdly, the path design of whole processes to have a doctor for citizens, practitioners’ system and two-way transfer medical services systems and classification medical service systems are raised. Then the paper analyses the possibilities of carrying out low-cost strategies in the whole medical profession.

混合动力挖掘机机电耦合分析及解耦策略
Hybrid Excavator Electromechanical Coupling Analyzing and Decoupling Strategy
 [PDF]


Dynamical Systems and Control (DSC) , 2014, DOI: 10.12677/DSC.2014.34008
Abstract:
液压挖掘机并联混合动力技术已经得到成功应用,并表现出良好的节能效果,尤其对于发动机燃油效率及寿命提升作用明显。然而其动力系统大都采用发动机、电动/发动机和液压泵同轴耦合方式,节省了装配空间,但亦存在强机电耦合,引起严重的轴系振动和噪声,影响主轴寿命和驾驶体验。本文分析了并联混合动力耦合机理及振动原因,提出了基于硬件减振和软件策略优化的解耦方法,以减少轴系振动,改善驾驶环境。
Parallel hybrid excavator technology has been successfully developed and showed good energy saving effect. Especially, it plays an important role for the life extension of the engine and the im-provement of fuel efficiency. However, its power systems were composed by diesel engine, electric motor and pump coaxially. Although it can save installation space by this link style, it may cause a strong electromechanical coupling, and even severe shafting vibration and noise. Eventually, it may affect spindle life and driving experience. Based on the analysis of the parallel hybrid vibration coupling mechanism, a new strategy based on hardware and software optimization was put forwarded. The experiment results show that it could reduce shaft vibration and improve the driving condition.
浅谈对食管癌防治研究的理解和思考
The Understanding and Considering of Prevention and Treatment on Esophageal Cancer
 [PDF]


Advances in Clinical Medicine (ACM) , 2016, DOI: 10.12677/ACM.2016.62017
Abstract:
食管癌是世界上最常见的恶性肿瘤之一,预后差,5年生存率仅15%左右。作者所在研究团队通过对食管癌高发区随访发现食管癌患者术后生存存在明显差异。针对这一生存现状,本文作者试着从外因与内因相结合、人群研究与实验室研究相结合、基础研究与临床研究相结合、传统研究与现代分子生物学技术相结合、研究者和研究对象、社会、医院相结合和人文关怀与心理干预等几个方面来初步探讨作者对食管癌研究与防治的一些理解。
Esophageal cancer (EC) is one of the six most common malignancies worldwide. Its prognosis was the worst; the survival rate of 5-years was only ten percent or so. During the field research in high incidence area, our study group founded that the survival time of some ESCC patients after their surgical operations was significantly difference. To this conditions, the aims is to discuss the un-derstanding and considering of esophageal cancer from some following ways: the combination of external and internal, population study and laboratory study, basical study and clinical study, local treatment and comprehension treatment, traditional study and modern molecular biology technology, researchers and research objects, sociology, hospital, humanistic care and psychological intervention.
机器视觉的像素校准
Machine Vision Pixel Calibration
 [PDF]

, 张茂青
Artificial Intelligence and Robotics Research (AIRR) , 2014, DOI: 10.12677/AIRR.2014.32005
Abstract:

描述了一种机器视觉校准的方法。在基于小孔成像相机模型的基础上,使用平板拍取若干张照片进行校验。采用几何坐标变换,并且结合齐次图形学,考虑相机镜头畸变的情况下,计算出相机的内参和外参。此类方法可以广泛御用使用于机器视觉的相机的校准。
We describe a method for the machine vision calibration. Based on pinhole camera model, we calibrate several pictures taken by a tablet. With geometry coordinate system transformation and combination of homogeneous graphics, this method calculates the camera intrinsic and extrinsic parameters considering of lens distortion. This method could be used for machine vision camera calibration.

混合动力挖掘机电驱回转能量回收方法
Research on Hybrid Excavator Energy Recovery Based on Electric Motor Driven Method
 [PDF]

, 张昱
Dynamical Systems and Control (DSC) , 2015, DOI: 10.12677/DSC.2015.41001
Abstract:
混合动力技术已经成为液压挖掘机节能研究的重点,基于混合动力技术的能量回收方案也得到了广泛研究。基于普通挖掘机的回转机构的特点分析,设计了一种电机驱动回转能量回收方案。方案以电动/发电一体机液压回转代替液压马达驱动回转机构,超级电容器为储能单元,采用矢量控制算法实现电机的驱动和能量回收。仿真研究表明,该方案具有较好的能量回收效果。
Hybrid technology has become the key technology to improve energy efficiency of hydraulic exca-vators. Based on it, several energy recovery schemes have been widely studied. After analyzing the characteristics of ordinary excavator slewing mechanism, a kind of motor-driven rotary energy recovery solutions has been introduced. It uses an electric motor instead of hydraulic motor to drive the slewing mechanism, and uses super-capacitor to be energy storage unit. Meanwhile, the vector control algorithm has been used to control the electric motor. Simulation results show that this solution could achieve good energy recovery efficiency.
沙柳纤维素纳米化及其结构测定
Nanostructures of Salix mongolica Cellulose and Structure Determination
 [PDF]

薛振华, 尚琪
Botanical Research (BR) , 2016, DOI: 10.12677/BR.2016.53012
Abstract: 本文以沙柳枝条为原料,应用硫酸水解法制备了沙柳纳米纤维素,借助现代仪器分析手段分析了沙柳纳米纤维素的结构和性能。研究结果表明,经硫酸水解处理后,沙柳纤维素不再成纤维簇而是分散成许多纤维单丝,其分子链被打断,分解温度较处理前降低,化学成分基本保持不变,纳米纤维素晶体的结晶度较原纤维有一定程度的提高。
The preparation process of nanocellulose was introduced in this paper using Salix branches by a method of sulfuric acid hydrolysis. And then the structure and characteristics of nanocellulose were detected with a series of modern analytic methods using advanced apparatus. The experimental results show that Salix mongolica cellulose was no longer fiber clusters but dispersed into many monofilaments after sulfuric acid hydrolysis. Its molecular chains were interrupted, the de-composition temperature was lower than before treatment, chemical composition remained bas-ically and the crystallinity increased.
小型化交指型LTCC带通滤波器设计
The Design of a Miniaturized Interdigital LTCC Bandpass Filter
 [PDF]

, 戴永胜
Hans Journal of Wireless Communications (HJWC) , 2016, DOI: 10.12677/HJWC.2016.62005
Abstract:
本文提出了一种基于LTCC技术的小型化交指型带通滤波器的设计方法,通过在交指线末端加载对地电容,压缩了谐振器尺寸,将对地电容布置在分立的空间中,避免了电容间的耦合干扰,引入非相邻谐振器间交叉耦合,在通带两端各产生一个零点,提高了边带抑制。设计了一款中心频率2.3 GHz,带宽200 M交指型带通滤波器,插损小于2.5 dB,通带波动优于0.5 dB,利用三维仿真软件HFSS建模及优化,并利用LTCC工艺加工制造,尺寸仅为3 mm × 2 mm × 1.5 mm,经测试,实际测试曲线与仿真曲线符合较好,验证了设计的有效性。
A method of designing miniaturized interdigital bandpass filter based on LTCC technology was proposed, through loading ground capacitance at the end of interdigital transmission line, com-pressed the volume of resonator, to arrange the ground capacitance in discrete space, avoided the coupling interference between themselves, then cross-coupling was introduced between nonad-jacent resonator, generated two transmission zeros on both sides of the passband and improved the sideband suppression. A interdigital bandpass filter with center frequency 2.3 GHz and bandwidth 200 M was designed, the insertion loss was less than 2.5 dB, passband fluctuation was better than 0.5 dB, HFSS was used to construct the 3D model and optimize the simulated results, then fa-bricated the filter with LTCC technology, the size was only 3 mm × 2 mm × 1.5 mm, the measured curves confirmed well with the simulated curves, verified the validity of the design.
Disposal of the Network Overtime in Java Programming
Java编程中网络超时的简单处理


计算机系统应用 , 2004,
Abstract: 本文分别就连接后和连接时两种情况,讨论了基于套接字的Java语言网络编程中网络超时的简单处理,提出了让Ja-va应用程序具有非阻塞模式I/O操作功能的方法,并且给出了一个简单的应用实例.
绿卡工程新型网络管理软件的开发

计算机系统应用 , 1998,
Abstract: 本文介绍了用于该工程的一种新型网络管理软件。它不仅具有SNMP网管协议中被管代理的全部功能,而且能主动采集本地网络主要设备的信息,弥补了原有软件只能完全被动地接受查询的缺陷。大大增强了网络管理功能。
Page 1 /8827
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.