期刊文献+
共找到5,278篇文章
< 1 2 250 >
每页显示 20 50 100
Bridging Cultural Differences 预览
1
作者 JIAO FENG 《今日中国:英文版》 2019年第8期64-66,共3页
SINCE setting foot in the African market in 2002, the StarTimes Group has been providing digital TV services to more than 22 million users (11 million mobile users) in more than 30 African countries, including Rwanda,... SINCE setting foot in the African market in 2002, the StarTimes Group has been providing digital TV services to more than 22 million users (11 million mobile users) in more than 30 African countries, including Rwanda, Nigeria, Kenya, Tanzania, Uganda, and South Africa. It has emerged as the fastest growing and most influential digital TV operator on the continent. StarTimes is committed to providing affordable and quality digital TV services to every African household. It has been working to help African people understand Chinese culture and be connected to the world, especially since the Belt and Road Initiative was launched. 展开更多
关键词 BRIDGING CULTURAL DIFFERENCES the AFRICAN MARKET
在线阅读 下载PDF
Compound Oxide Catalysis CO-SCR Mechanism Research 预览
2
作者 Shuting Wang Chen Yihui 《探索-环境科学与技术》 2019年第1期6-9,共4页
A series. Ce-co-oX Catalysts. prepared by co-precipitation method, CO-SCR performance.Studied. influence CO, CE ratio. activity. CO-SCR. investigated, Ce (0.3)-Co (0.7)-OXSample showed Highest NO conversion efficiency... A series. Ce-co-oX Catalysts. prepared by co-precipitation method, CO-SCR performance.Studied. influence CO, CE ratio. activity. CO-SCR. investigated, Ce (0.3)-Co (0.7)-OXSample showed Highest NO conversion efficiency 84% at 250℃. according. characterization: it. proposed, active sites.CO-SCR. Co. Ce (0.3)-Co (0.7)-OX. There. two reasons responsible. enhanced catalytic performance by Ce doping.Ce-co-oX Catalyst. firstly, specific surface area, pressureswing capacity. increased. Ce doping. Secondly a solidSolution. formed. Ce-co-oX Catalyst, resulting in the enhanced oxygen migration rate.The CO-SCR is lively to follow a mechanism that gaseous or weakly-adsorbed CO returns with adsorbed NO specialties in the forms Bridging bidendate nitrite and chelate nitrate. 展开更多
关键词 Cerium OXIDE Cobalt OXIDE CO-SCR Weak adsorbed CO BRIDGING BIDENTATE NITRITE species
在线阅读 下载PDF
波峰焊接常见不良情况及改进措施 预览
3
作者 贾忠中 《电子工艺技术》 2019年第2期120-124,共5页
波峰焊接工艺比再流焊接工艺复杂很多,影响因素不限于设备本身,更大程度上是受设计的影响。简要介绍了波峰焊接工艺的原理及常见的两个主要不良现象(桥连和透锡不足),及其产生原因和改善方向。实践表明,只要在产品工艺设计时给与重视,... 波峰焊接工艺比再流焊接工艺复杂很多,影响因素不限于设备本身,更大程度上是受设计的影响。简要介绍了波峰焊接工艺的原理及常见的两个主要不良现象(桥连和透锡不足),及其产生原因和改善方向。实践表明,只要在产品工艺设计时给与重视,桥连与透锡不良是可以有效解决的,特别是透锡不足的问题可以100%地给与解决。 展开更多
关键词 波峰焊 桥连 透锡不良 改进措施
在线阅读 下载PDF
支持桥接和过流保护可监测音频功放的设计
4
作者 周静雷 王亚磊 《国外电子测量技术》 2019年第1期92-95,共4页
为了满足不同功率标称扬声器的测试需求和实现对测试通道是否过流的实时监测,设计了一款支持桥接和过流保护的多通道可监测音频功放。方案采用了专业的音频功率放大芯片LM4780,通过桥接和非桥接模式对音频测试信号进行处理来驱动扬声器... 为了满足不同功率标称扬声器的测试需求和实现对测试通道是否过流的实时监测,设计了一款支持桥接和过流保护的多通道可监测音频功放。方案采用了专业的音频功率放大芯片LM4780,通过桥接和非桥接模式对音频测试信号进行处理来驱动扬声器工作。采用stm32f10作为监测系统的主控芯片,通过采样电路实现对各个测试通道输入输出电压、输出电流等参量的采集,并由受控继电器来实现对过流故障通道的切断。监测终端与下位机通过USB进行通信,并将实时采集的测试参量在UI界面进行显示。经过实际运行测试证明:仪器工作电压稳定、支持桥接和过流保护、监测精度高和实时性强。 展开更多
关键词 桥接 过流保护 功放 USB通信 监测
Abductive learning: towards bridging machine learning and logical reasoning
5
作者 Zhi-Hua ZHOU 《中国科学:信息科学(英文版)》 SCIE EI CSCD 2019年第7期220-222,共3页
In the history of artificial intelligence research,machine learning and logical reasoning have almost been separately developed.It is often argued that advanced intelligent technologies would emerge when machine learn... In the history of artificial intelligence research,machine learning and logical reasoning have almost been separately developed.It is often argued that advanced intelligent technologies would emerge when machine learning and logical reasoning are seamlessly integrated as human beings generally perform problem-solving based on the leverage of perception and reasoning,where perception corresponds to a data-driven process that can be realized by machine learning whereas reasoning corresponds to a knowledge-driven process that can be realized by logical reasoning. 展开更多
关键词 Abductive LEARNING BRIDGING MACHINE logical REASONING
Repair of long segmental ulnar nerve defects in rats by several different kinds of nerve transposition 预览
6
作者 Fei Yu You-Lai Yu +7 位作者 Su-Ping Niu Pei-Xun Zhang Xiao-Feng Yin Na Han Ya-Jun Zhang Dian-Ying Zhang Yu-Hui Kou Bao-Guo Jiang 《中国神经再生研究:英文版》 SCIE CAS CSCD 2019年第4期692-698,共7页
Multiple regeneration of axonal buds has been shown to exist during the repair of peripheral nerve injury,which confirms a certain repair potential of the injured peripheral nerve.Therefore,a systematic nerve transpos... Multiple regeneration of axonal buds has been shown to exist during the repair of peripheral nerve injury,which confirms a certain repair potential of the injured peripheral nerve.Therefore,a systematic nerve transposition repair technique has been proposed to treat severe peripheral nerve injury.During nerve transposition repair,the regenerated nerve fibers of motor neurons in the anterior horn of the spinal cord can effectively grow into the repaired distal nerve and target muscle tissues,which is conducive to the recovery of motor function.The aim of this study was to explore regeneration and nerve functional recovery after repairing a long-segment peripheral nerve defect by transposition of different donor nerves.A long-segment(2 mm)ulnar nerve defect in Sprague-Dawley rats was repaired by transposition of the musculocutaneous nerve,medial pectoral nerve,muscular branches of the radial nerve and anterior interosseous nerve(pronator quadratus muscle branch).In situ repair of the ulnar nerve was considered as a control.Three months later,wrist flexion function,nerve regeneration and innervation muscle recovery in rats were assessed using neuroelectrophysiological testing,osmic acid staining and hematoxylin-eosin staining,respectively.Our findings indicate that repair of a long-segment ulnar nerve defect with different donor nerve transpositions can reinnervate axonal function of motor neurons in the anterior horn of spinal cord and restore the function of affected limbs to a certain extent. 展开更多
关键词 NERVE REGENERATION NERVE TRANSPOSITION REPAIR conical SLEEVE small gap SLEEVE bridging ulnar NERVE target organ muscle NERVE REINNERVATION neural REGENERATION
在线阅读 下载PDF
Long-term outcomes of hepatocellular carcinoma that underwent chemoembolization for bridging or downstaging 预览
7
作者 Breno Boueri Affonso Francisco Leonardo Galastri +7 位作者 Joaquim Mauricio da Motta Leal Filho Felipe Nasser Priscila Mina Falsarella Rafael Noronha Cavalcante Marcio Dias de Almeida Guilherme Eduardo Goncalves Felga Leonardo Guedes Moreira Valle Nelson Wolosker 《世界胃肠病学杂志:英文版》 SCIE CAS 2019年第37期5687-5701,共15页
BACKGROUND Prospective study of 200 patients with hepatocellular carcinoma(HCC)that underwent liver transplant(LT)after drug-eluting beads transarterial chemoembolization(DEB-TACE)for downstaging versus bridging.Overa... BACKGROUND Prospective study of 200 patients with hepatocellular carcinoma(HCC)that underwent liver transplant(LT)after drug-eluting beads transarterial chemoembolization(DEB-TACE)for downstaging versus bridging.Overall survival and tumor recurrence rates were calculated,eligibility for LT,time on the waiting list and radiological response were compared.After TACE,only patients within Milan Criteria(MC)were transplanted.More patients underwent LT in bridging group.Five-year post-transplant overall survival,recurrence-free survival has no difference between the groups.Complete response was observed more frequently in bridging group.Patients in DS group can achieve posttransplant survival and HCC recurrence-free probability,at five years,just like patients within MC in patients undergoing DEB-TACE.AIM To determine long-term outcomes of patients with HCC that underwent LT after DEB-TACE for downstaging vs bridging.METHODS Prospective cohort study of 200 patients included from April 2011 through June 2014.Bridging group included patients within MC.Downstaging group(out of MC)was divided in 5 subgroups(G1 to G5).Total tumor diameter was≤8 cm for G1,2,3,4(n=42)and was>8 cm for G5(n=22).Downstaging(n=64)and bridging(n=136)populations were not significantly different.Overall survival and tumor recurrence rates were calculated by the Kaplan-Meier method.Additionally,eligibility for LT,time on the waiting list until LT and radiological response were compared.RESULTS After TACE,only patients within MC were transplanted.More patients underwent LT in bridging group 65.9%(P=0.001).Downstaging population presented:higher number of nodules 2.81(P=0.001);larger total tumor diameter 8.09(P=0.001);multifocal HCC 78%(P=0.001);more post-transplantation recurrence 25%(P=0.02).Patients with maximal tumor diameter up to 7.05 cm were more likely to receive LT(P=0.005).Median time on the waiting list was significantly longer in downstaging group 10.6 mo(P=0.028).Five-year posttransplant overall survival was 73.5%in downstaging and 72.3% 展开更多
关键词 HEPATOCELLULAR carcinoma Down-staging Liver TRANSPLANTATION Local regional therapy BRIDGING
在线阅读 免费下载
滤网对颗粒捕集过程的微观实验 预览
8
作者 余振辉 柳静献 +1 位作者 初砚昊 田鹏 《东北大学学报:自然科学版》 EI CAS CSCD 北大核心 2019年第3期430-434,446共6页
由于滤网具有良好的颗粒捕集性能而被广泛应用于工业或民用领域,但对其微观捕集机理研究尚且有限.本文通过建立一套显微观测系统真实记录滤网捕集颗粒的全过程,研究其在捕集颗粒过程中的微观表现,分析影响单纤维过滤及滤网网孔架桥堵塞... 由于滤网具有良好的颗粒捕集性能而被广泛应用于工业或民用领域,但对其微观捕集机理研究尚且有限.本文通过建立一套显微观测系统真实记录滤网捕集颗粒的全过程,研究其在捕集颗粒过程中的微观表现,分析影响单纤维过滤及滤网网孔架桥堵塞的影响因素.结果表明随着过滤风速的减小,滤网的未堵塞孔面积与孔总面积之比逐渐降低,且最终会出现一个稳定状态;而随着滤网孔径的减小,该比值逐渐降低.在实际使用过程中应根据具体使用条件合理选择过滤风速和滤网孔径,对于长时间使用的滤网应及时清灰避免二次污染. 展开更多
关键词 滤网 捕集机理 显微观测 架桥 网孔堵塞
在线阅读 下载PDF
Liver transplantation for hepatocellular carcinoma: Where do we stand? 预览
9
作者 Francesco Santopaolo Ilaria Lenci +2 位作者 Martina Milana Tommaso Maria Manzia Leonardo Baiocchi 《世界胃肠病学杂志:英文版》 SCIE CAS 2019年第21期2591-2602,共12页
Hepatocellular carcinoma represents an important cause of morbidity and mortality worldwide. It is the sixth most common cancer and the fourth leading cause of cancer death. Liver transplantation is a key tool for the... Hepatocellular carcinoma represents an important cause of morbidity and mortality worldwide. It is the sixth most common cancer and the fourth leading cause of cancer death. Liver transplantation is a key tool for the treatment of this disease in human therefore hepatocellular carcinoma is increasing as primary indication for grafting. Although liver transplantation represents an outstanding therapy for hepatocellular carcinoma, due to organ shortage, the careful selection and management of patients who may have a major survival benefit after grafting remains a fundamental question. In fact, only some stages of the disease seem amenable of this therapeutic option, stimulating the debate on the appropriate criteria to select candidates. In this review we focused on current criteria to select patients with hepatocellular carcinoma for liver transplantation as well as on the strategies (bridging) to avoid disease progression and exclusion from grafting during the stay on wait list. The treatments used to bring patients within acceptable criteria (down-staging), when their tumor burden exceeds the standard criteria for transplant, are also reported. Finally, we examined tumor reappearance following liver transplantation. This occurrence is estimated to be approximately 8%-20% in different studies. The possible approaches to prevent this outcome after transplant are reported with the corresponding results. 展开更多
关键词 HEPATOCELLULAR carcinoma Liver transplantation BRIDGING Down-staging MILAN Criteria
在线阅读 免费下载
宽带卫星通信路由功能设计 预览
10
作者 马中海 雷俊 《通信与广播电视》 2018年第2期6-10,共5页
本文针对卫星通信桥接方式的缺陷,设计出了一种路由方案。该方案能明显的减少卫星信道上的广播包数量,提升了卫星信道的利用效率,避免卫星信道的阻塞。
关键词 卫星信道 桥接 路由 地球站
在线阅读 下载PDF
污油泥絮凝机理及其研究进展
11
作者 陈颖 田宫伟 +1 位作者 梁宇宁 高彦华 《精细化工》 CSCD 北大核心 2018年第7期1081-1086,1096共7页
根据污油泥处理过程,对常见的化学絮凝过程进行了总结,并对主要絮凝机理及优势和局限性进行了分析。得出了结论:吸附架桥、卷扫网捕、电中和、胞外聚合物架桥等机理配合使用,使絮凝剂有优异的絮凝性能,且其经改性、复合、复配等方法使... 根据污油泥处理过程,对常见的化学絮凝过程进行了总结,并对主要絮凝机理及优势和局限性进行了分析。得出了结论:吸附架桥、卷扫网捕、电中和、胞外聚合物架桥等机理配合使用,使絮凝剂有优异的絮凝性能,且其经改性、复合、复配等方法使自身有多种絮凝机制,这对于合成高效的污油泥絮凝剂具有重要意义。最后指出污油泥絮凝过程复杂,进一步研究其具体作用方式和机理以及影响絮凝作用的主要因素都将有助于污油泥絮凝剂的广泛应用。 展开更多
关键词 污油泥 絮凝机理 吸附 聚合物 架桥
Bridging performance of new eco-friendly lost circulation materials 预览
12
作者 NASIRI Alireza GHAFFARKHAH Ahmadreza +2 位作者 DIJVEJIN Zahra Azimi MOSTOFI Masood MORAVEJI Mostafa Keshavarz 《石油勘探与开发:英文版》 2018年第6期1154-1165,共12页
Lost circulation is one of the most important concerns of the drilling industry, causing excessive expenditure and increasing the non-productive drilling time. In this study, various lost circulation materials(LCMs) w... Lost circulation is one of the most important concerns of the drilling industry, causing excessive expenditure and increasing the non-productive drilling time. In this study, various lost circulation materials(LCMs) were used to control the lost circulation of two types of drilling fluids, bentonite mud and a new eco-friendly mud, named RIA-X, which has a remarkable effect on decreasing the amount of lost circulation in fractured and highly permeable reservoirs. The Bridging Material Test(BMT) apparatus was used to investigate the effectiveness of various LCMs in fractures of various sizes and to select the LCM and combination with the best performance. The use of three-dimensional fractures is one of the most notable points of this work, which makes the experimental conditions similar to those of real wells. The lost control performance of the new eco-friendly LCMs in RIA-X mud was tested in field. The outcomes show that the designed LCMs are able to control severe lost circulation that regular processes such as cementing or drilling with foam cannot deal with. 展开更多
关键词 ECO-FRIENDLY LOST CIRCULATION MATERIAL drilling MUD BRIDGING MATERIAL test LOST CIRCULATION
在线阅读 免费下载
Overview of coronary artery variants,aberrations and anomalies 预览
13
作者 Stylianos Kastellanos Konstantinos Aznaouridis +3 位作者 Charalambos Vlachopoulos Eleftherios Tsiamis Evangelos Oikonomou Dimitris Tousoulis 《世界心脏病学杂志:英文版(电子版)》 2018年第10期127-140,共14页
Coronary artery anomalies and variants are relatively uncommon congenital disorders of the coronary artery anatomy and constitute the second most common cause of sudden cardiac death in young competitive athletes.The ... Coronary artery anomalies and variants are relatively uncommon congenital disorders of the coronary artery anatomy and constitute the second most common cause of sudden cardiac death in young competitive athletes.The rapid advancement of imaging techniques,including computed tomography,magnetic resonance imaging,intravascular ultrasound and optical coherence tomography,have provided us with a wealth of new information on the subject.Anomalous origin of a coronary artery from the contralateral sinus is the anomaly most frequently associated with sudden cardiac death,in particular if the anomalous coronary artery has a course between the aorta and the pulmonary artery.However,other coronary anomalies,like anomalous origin of the left coronary artery from the pulmonary artery,atresia of the left main stem and coronary fistulae,have also been implicated in cases of sudden cardiac death.Patients are usually asymptomatic,and in most of the cases,coronary anomalies are discovered incidentally during coronary angiography or on autopsy following sudden cardiac death.However,in some cases,symptoms like angina,syncope,heart failure and myocardial infarction may occur.The aims of this article are to present a brief overview of the diverse coronary variants and anomalies,focusing especially on anatomical features,clinical manifestations,risk of sudden cardiac death and pathophysiologic mechanism of symptoms,as well as to provide valuable information regarding diagnostic workup,follow-up,therapeutic choices and timing of surgical treatment. 展开更多
关键词 Ectopic CORONARY arteries CORONARY ARTERY ANOMALIES CORONARY FISTULAE CORONARY ARTERY VARIANTS Myocardial bridging CORONARY ARTERY anatomy Sudden cardiac death
在线阅读 免费下载
基于GWO的无线Mesh网络最优模板对比的路由算法 预览
14
作者 于小民 夏换 +1 位作者 杨秀璋 范郁锋 《现代计算机:上下旬》 2018年第20期8-11,共4页
现如今,无线Mesh网络越来越多的被应用在现实生活中。无线Mesh网络以其桥接和多跳传输的特点,成为新时代网络架设最重要的应用体系之一。由于与传统数据传输网络的差异,路由算法显的尤为重要,所以基于各种模型的路由算法也应运而生,但... 现如今,无线Mesh网络越来越多的被应用在现实生活中。无线Mesh网络以其桥接和多跳传输的特点,成为新时代网络架设最重要的应用体系之一。由于与传统数据传输网络的差异,路由算法显的尤为重要,所以基于各种模型的路由算法也应运而生,但是这些算法均专注于对路径匹配,即当没有等到最优路径匹配之前没有最优的评估函数值。基于这种情况,需要一种包含最优评估标准的新算法匹配路由路径并且衡量路由路径和网络架设的质量。 展开更多
关键词 路由算法 桥接 多跳 无线MESH网络 路径匹配
在线阅读 免费下载
成人体外膜氧合支持下转运不良事件研究进展 预览
15
作者 周兴梅 方芳 +1 位作者 张瑶 张敏 《护理研究》 北大核心 2018年第22期3487-3491,共5页
体外膜氧合支持存在内环境不稳;航空和/或陆地运输以及多次装载等外环境中的潜在风险;转运团队配合不良引起的人为偏差,发展中的体外膜肺技术不可避免的缺陷都有可能导致转运不良事件以及病人预后不良,转运成本大幅度升高。现综述近年... 体外膜氧合支持存在内环境不稳;航空和/或陆地运输以及多次装载等外环境中的潜在风险;转运团队配合不良引起的人为偏差,发展中的体外膜肺技术不可避免的缺陷都有可能导致转运不良事件以及病人预后不良,转运成本大幅度升高。现综述近年来发现的转运不良事件并提出相应的对策。 展开更多
关键词 体外膜氧合 转运 不良事件 生命支持 并发症 移动 桥接 对策
在线阅读 免费下载
500kV输电线路覆冰闪络故障原因分析及防范措施 预览 被引量:2
16
作者 祝永坤 刘博 +2 位作者 李祥杰 高树永 金光民 《内蒙古电力技术》 2018年第5期79-81,共3页
大兴安岭地区某500 kV输电线路发生了覆冰闪络故障.分析认为由于该输电线路所处区域为垭口地形,每年换季时节多出现雨雪天气,极易形成雨凇覆冰桥接复合绝缘子闪裙,引发覆冰闪络故障.并提出了在微地形微气象区,500 kV输电线路宜采用大伞... 大兴安岭地区某500 kV输电线路发生了覆冰闪络故障.分析认为由于该输电线路所处区域为垭口地形,每年换季时节多出现雨雪天气,极易形成雨凇覆冰桥接复合绝缘子闪裙,引发覆冰闪络故障.并提出了在微地形微气象区,500 kV输电线路宜采用大伞隔断的防冰复合绝缘子或插花串,尽可能采用V形串或倒V形串防止冰凌桥接形成闪络通道,以及配置输电线路融冰装置,防止导地线覆冰断线等提高输电线路抗冰能力的防范措施. 展开更多
关键词 500KV输电线路 绝缘子 覆冰 桥接 闪络
在线阅读 下载PDF
加压气化工艺煤粉锁斗下料问题分析及优化 预览
17
作者 胡小斌 李晓宏 黄勇 《煤化工》 CAS 2018年第4期49-52,57共5页
针对在加压气化工艺中煤粉锁斗运行下料过程中出现的因架桥导致下料不畅的问题,分析了煤粉锁斗中架桥产生的原因,提出了正压下料(方案1)、泄压下料(方案2)、压差下料(方案3)三种解决方案。从技术、检修、操作方面对这3种方案进行... 针对在加压气化工艺中煤粉锁斗运行下料过程中出现的因架桥导致下料不畅的问题,分析了煤粉锁斗中架桥产生的原因,提出了正压下料(方案1)、泄压下料(方案2)、压差下料(方案3)三种解决方案。从技术、检修、操作方面对这3种方案进行了对比分析。分析表明:从技术及操作方面,方案3优于方案1和方案2;从检修方面,方案1优于方案2和方案3,综合考虑,方案3的优越性更明显。从设计方面和操作方面,提出了优化措施,解决锁斗下料不稳定的问题。 展开更多
关键词 煤粉 锁斗 加压气化 架桥 下料
在线阅读 下载PDF
超高装饰施工脚手架受力分析 预览
18
作者 卢群芳 杨向峰 +1 位作者 李瑞 宋建学 《河南城建学院学报》 CAS 2018年第6期1-8,共8页
为研究超高装饰施工满堂脚手架在使用过程中的内力和变形规律,确保施工安全,以郑州市民中心Ⅰ标段科技馆精装修项目为背景,建立有限元模型进行分析计算。结果表明:立杆加固范围为脚手架搭设高度的1/3~1/2左右,受力较合理;水平剪刀撑和... 为研究超高装饰施工满堂脚手架在使用过程中的内力和变形规律,确保施工安全,以郑州市民中心Ⅰ标段科技馆精装修项目为背景,建立有限元模型进行分析计算。结果表明:立杆加固范围为脚手架搭设高度的1/3~1/2左右,受力较合理;水平剪刀撑和竖向剪刀撑均参与工作,竖向剪刀撑承担的内力大于水平杆,最大是水平杆的2.3倍;超高脚手架整体倒塌的初始部位位于架体上部,脚手架中、上部应与主体结构“抱柱拉结”以及加密水平剪刀撑。 展开更多
关键词 扣件式钢管脚手架 超高 现场试验 整体稳定 剪刀撑
在线阅读 免费下载
复合材料零件贫胶缺陷的形成和改善
19
作者 胡德艳 《飞机设计》 2017年第5期34-37,共4页
贫胶缺陷在热压罐成型的复合材料零件,尤其是型面复杂的零件中是常见的问题,这些问题导致零件局部区域的纤维暴露,纤维的变形,零件与零件之间不可预期的差异,并且对零件后续表面处理及喷漆质量造成严重影响。重点分析了贫胶缺陷产生的... 贫胶缺陷在热压罐成型的复合材料零件,尤其是型面复杂的零件中是常见的问题,这些问题导致零件局部区域的纤维暴露,纤维的变形,零件与零件之间不可预期的差异,并且对零件后续表面处理及喷漆质量造成严重影响。重点分析了贫胶缺陷产生的原因及其对零件性能和生产造成的不良影响,并总结了贫胶缺陷的检测要求,预防措施和在具体生产实践中采取的有效措施。 展开更多
关键词 热压罐成型 复合材料零件 贫胶 架桥 压力
生物质固定床气化炉异常工况的分析 预览
20
作者 陈建国 傅玉栋 徐有宁 《沈阳工程学院学报:自然科学版》 2017年第2期131-134,共4页
针对以空气为气化介质的径高比为0.32的下吸式固定床气化炉,当通风量为11m3/h时,分别研究了在正常运行、“搭桥”及“烧穿”情况下反应温度及气化燃气组分百分率变化规律.研究结果表明,在发生“搭桥”、“烧穿”的异常工况下,反应温度... 针对以空气为气化介质的径高比为0.32的下吸式固定床气化炉,当通风量为11m3/h时,分别研究了在正常运行、“搭桥”及“烧穿”情况下反应温度及气化燃气组分百分率变化规律.研究结果表明,在发生“搭桥”、“烧穿”的异常工况下,反应温度会偏离正常值且各燃气组分百分率会明显下降,并分析了产生此效果的原因. 展开更多
关键词 生物质 下吸式固定床气化炉 反应温度 搭桥 烧穿
在线阅读 下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部 意见反馈