期刊文献+
共找到1,120篇文章
< 1 2 56 >
每页显示 20 50 100
HPC海量存储系统Pass-Through访问策略研究 被引量:2
1
作者 朱平 《计算机研究与发展》 EI CSCD 北大核心 2013年第8期1667-1673,共7页
为了解决海量信息处理中实时访问中的"I/O墙"的问题,提高海量信息分布式存储系统的性能,提出了一种基于高性能计算(high performance computing,HPC)的存储部件新型访问策略.首先,分析传统访问模型存在的问题;其次,研究存储... 为了解决海量信息处理中实时访问中的"I/O墙"的问题,提高海量信息分布式存储系统的性能,提出了一种基于高性能计算(high performance computing,HPC)的存储部件新型访问策略.首先,分析传统访问模型存在的问题;其次,研究存储部件直通路模式的工作机理,建立存储系统分解为多层次、分布式的模型,根据不同的层次和映射策略实现存储空间物理地址、缓存地址、存储系统逻辑空间地址的连续映射;第三,分析直通路访问模式下的存储路径时间开销;第四,在模拟环境下存储部件访问的性能测试,在实际采用该策略的应用系统中进行验证.通过验证测试结果表明,该方法能有效提高存储系统的性能,能够不断满足海量信息处理实时需要. 展开更多
关键词 高性能计算 海量存储系统 存储部件直通路 存储层次映射 存储策略
在线阅读 下载PDF
Correlation between pass-through flux of cobalt target and microstructure and magnetic properties of sputtered thin films
2
作者 Xiu-Lan Xu Qian-Ming Huang +8 位作者 Guo-Nan Feng Gang Han Qi-Xun Guo Xiao-Dong Xiong Xin He Jun-Feng Luo Rong-Ming Wang Chun Feng Guang-Hua Yu 《Rare Metals》 SCIE EI CAS CSCD 2021年第4期975-980,共6页
Cobalt thin films were deposited on silicon substrates by magnetron sputtering two commercial cobalt targets with different pass-through fluxes(PTFs).The influences of PTF on the magnetic properties of sputtered thin ... Cobalt thin films were deposited on silicon substrates by magnetron sputtering two commercial cobalt targets with different pass-through fluxes(PTFs).The influences of PTF on the magnetic properties of sputtered thin films were investigated.The results indicate that under the same sputtering conditions,cobalt thin film deposited by Co target with high PTF(84.21%) has lower remanence ratio(0.65),while cobalt thin film prepared by Co target with low PTF(69.13%) has higher remanence ratio(0.87).Through introducing an external magnetic field parallel to the film surface during sputtering processes,both the remanence ratios of cobalt thin films prepared by the two targets can be enhanced to approach 1.High-resolution transmission electron microscopy(HRTEM) images show that in the absence of the external magnetic field during sputtering,cobalt thin film deposited by the target with high PTF is randomly oriented in crystallographic orientations,which is due to that Co atoms have no enough time to migrate and diffuse on substrate and the atomic stacking is disordered.It is worth mentioning that crystallographic orientations of cobalt thin film deposited by target with low PTF are relatively consistent,resulting in relatively higher remanence ratio.In addition,HRTEM analysis indicates that the external magnetic field during sputtering drives the Co grains to arrange in a regular order with(002) orientation,leading to the improvement in remanence ratios. 展开更多
关键词 Sputtering target pass-through flux Thin film MICROSTRUCTURE
原文传递
DIgi率先在工业自动化设备服务器提供串行Pass-Through功能
3
《可编程控制器与工厂自动化(PLC FA)》 2004年第6期26-26,共1页
关键词 工业自动化设备 服务器 pass-through PLC DIgi公司
在线阅读 下载PDF
Pass-through Effects of Global Commodity Prices on China's Inflation:An Empirical Investigation 被引量:8
4
作者 Ligang Liu Andrew Tsang 《China & World Economy》 SCIE 2008年第6期22-34,共13页
The present paper uses a two-step approach to estimate the pass-through effects of changes in international commodity prices and the RMB exchange rate on domestic consumer price inflation in China. We first estimate t... The present paper uses a two-step approach to estimate the pass-through effects of changes in international commodity prices and the RMB exchange rate on domestic consumer price inflation in China. We first estimate the pass-through effects of international commodity prices on producer prices and then estimate the pass-through effects of producer price inflation on consumer price inflation. We find that a l O-percent increase in international commodity prices would lead to China' s producer prices increasing by 1.2 percent 3 months later, which in turn would increase China' s domestic inflation by 0.24 percent over the same period. However, a 10-percent appreciation of the RMB exchange rate against the US dollar would help to reduce increases in producer prices by 4.4 percent over the following 3 months, which in turn would lead to a 0. 89-percent decline in consumer price inflation over the same period. Our findings suggest that appreciation of the RMB in an environment of rising global commodity prices and a weak US dollar could be an effective instrument to help contain inflation in China. 展开更多
关键词 China commodity price exchange rate pass-through
原文传递
Interest Rate Pass-through in a Dual-track System:Evidence from China 被引量:7
5
作者 Xuejun Jin Frank M.Song +1 位作者 Yizhong Wang Yi Zhong 《China & World Economy》 SCIE 2014年第4期21-39,共19页
Using the Phillips-Loretan approach, this paper verifies the degree and speed of pass- through and rigidity of different interest rates in China, as well as the response of private loan interest rates to other interes... Using the Phillips-Loretan approach, this paper verifies the degree and speed of pass- through and rigidity of different interest rates in China, as well as the response of private loan interest rates to other interest rates during 2002-2012. The results indicate that the long-term pass-through from the interbank offered rates and deposit and loan interest rates to the treasury bond rate is incomplete, but that the long-term pass-through to private loan interest rates is overshooting. The long-term pass-through from the deposit and loan interest rates to the overnight interbank offered rate is incomplete, while that to the interbank offered rates of other maturities is complete. The short-term passthrough and adjustment speed of interest rates exhibit asymmetry. Therefore, before considering a full liberalization of interest rates, it is important to further enhance the competition of the financial system and the function of different interest rate systems, such as the interhank market and bond market. 展开更多
关键词 interest rate liberalization interest rate pass-through RIGIDITY
原文传递
Exchange Rate Pass-through in China 被引量:3
6
作者 Chang Shu Xiaojing Su 《China & World Economy》 SCIE 2009年第1期33-46,共14页
During the second half of 2007 and early part of 2008 when there were intense inflationary pressures in China, RMB appreciation was advocated as a means of helping to curb inflation. The effectiveness of appreciation ... During the second half of 2007 and early part of 2008 when there were intense inflationary pressures in China, RMB appreciation was advocated as a means of helping to curb inflation. The effectiveness of appreciation in controlling inflation depends on the impact of exchange rate movements on import and domestic prices. Our analysis finds fairly large and speedy exchange rate pass-through (ERPT) to import prices: 50 and 60percent for the short run and long run, respectively. However, the degree of ERPT decreases along the price chain from upstream to downstream prices. ERPT for consumer prices, the most downstream prices, is much milder and has substantial lags. A 10-percent rise in the nominal effective exchange rate will dampen consumer prices by 1.1 percent within a year, with very little pass-through in the first half year, and by 2.0percent over the long run. These findings, particularly the ERPT to consumer prices, suggest that RMB appreciation can help to reduce inflationary pressures over the longer term. However, it is unlikely to provide rapid relief to the current round of high inflation because of the long lags in ERPZ. The RMB needs to strengthen in effective terms to exert the desired dampening impact on prices. 展开更多
关键词 exchange rate pass-through import prices INFLATION RMB appreciation
原文传递
Low Inflation,Pass-through,and a Discrete Inflation-targeting Framework for Monetary Policy in China 被引量:2
7
作者 Chengsi Zhang 《China & World Economy》 SCIE 2007年第2期59-73,共15页
The performance of inflation in China over the past few decades has been remarkable. This paper characterizes the statistical nature of the inflation series in China over the past quarter of a century and presents an ... The performance of inflation in China over the past few decades has been remarkable. This paper characterizes the statistical nature of the inflation series in China over the past quarter of a century and presents an interesting scenario of large decline in inflation passthrough accompanied with low inflation since the end of the 1990s. How should monetary policy in China be conducted under these new economic conditions? We propose a discrete inflation-targeting framework for monetary policy, which is likely to be suitable for the regime of low inflation and inflation pass-through. The advantages and caveats of adopting such a framework are also discussed. 展开更多
关键词 inflation pass-through inflation targeting monetary policy
原文传递
Interest rate liberalization and pass-through of monetary policy rate to bank lending rates in China 被引量:3
8
作者 Jingya Li Ming-Hua Liu 《Frontiers of Business Research in China》 2019年第2期212-230,共19页
We examine whether the effectiveness of the monetary policy rate transmission differs before and after interest rate liberalization in China using the autoregressive distributed lag (ARDL) bound test and an error corr... We examine whether the effectiveness of the monetary policy rate transmission differs before and after interest rate liberalization in China using the autoregressive distributed lag (ARDL) bound test and an error correction model (ECM). The results show that after liberalization the mark-up is lower, and both the Iong-run and shortrun interest rate pass-through has become faster and more complete. We attribute our findings to the ongoing reforms of China's banking system, which has improved the competitiveness of Chinese commercial banks. 展开更多
关键词 INTEREST RATE pass-through INTEREST RATE LIBERALIZATION China Autoregressive distributed lag (ARDL) bound test Error correction model (ECM)
原文传递
China's Share of US Imports and Exchange Rate Pass-through to US Import Prices 被引量:1
9
作者 Jianhuan Zhou Donghun Kim 《China & World Economy》 SCIE 2011年第3期87-104,共18页
The present paper investigates the effect of China's share of US imports on the aggregatelevel exchange rate pass-through to US import prices over the period from January 1999 to December 2008. The paper also focuses... The present paper investigates the effect of China's share of US imports on the aggregatelevel exchange rate pass-through to US import prices over the period from January 1999 to December 2008. The paper also focuses on the post-reform period, after 2005, allowing greater ftexibility of the RMB to explore the change in the role of the Chinese import share in determining the trend in the US exchange rate pass-through. Evidence reveals that China's share of US imports has a negative effect on the exchange rate pass-through. However, this negative effect has been moderated to a negligible level since China's exchange rate reform. An important implication is that the exchange rate flexibility of the RMB has been raised to a significant level may no longer cause distortion in the US competitive environment and prevent the USA from adjusting current accounts. 展开更多
关键词 China's share exchange rate pass-through US import prices
原文传递
Exchange Rate Pass-through to China's Export Price: A Product-level Investigation
10
作者 Jian Han Yanzhi Shen 《China & World Economy》 SCIE 2016年第2期48-67,共20页
Exchange rate movement usually results in changes in the production costs of exporting firms, and, therefore, the prices and the quantity of traded products. The present paper constructs a theoretical model to demonst... Exchange rate movement usually results in changes in the production costs of exporting firms, and, therefore, the prices and the quantity of traded products. The present paper constructs a theoretical model to demonstrate that export products with higher productivity, or with larger market share, or of higher quality will experience a less complete passthrough. Using the six-digit harmonized system export data from the CEPII database over the period of 2000 to 2013, the present paper examines how product heterogeneity affects the exchange rate pass-through of Chinese exports. The empirical results show that the most competitive Chinese export products, or those least affected by exchange rate risks, are those of higher quality, with higher technological complexity and at the high end of the international value chain. Therefore, Chinese exporting firms should pay more attention to improving export quality and upgrading technology to better cope with exchange rate risks and to enjoy more bargaining power in the international market. 展开更多
关键词 exchange rate pass-through export competitiveness product heterogeneity
原文传递
通过式固相萃取净化-超高效液相色谱-串联质谱法快速测定部分动物源性食品中46种杀虫剂残留
11
作者 肖泳 曾小明 +4 位作者 李政 袁列江 邓航 谢叔娥 潘照 《食品研究与开发》 2026年第1期134-144,共11页
该研究建立通过式固相萃取结合超高效液相色谱-串联质谱法快速测定部分动物源性食品中46种杀虫剂残留的分析方法。样品加水分散后,用乙腈提取,HMR-Lipid固相萃取柱净化,经XSelect HSS T3色谱柱分离,以甲醇和水为流动相进行梯度洗脱,基... 该研究建立通过式固相萃取结合超高效液相色谱-串联质谱法快速测定部分动物源性食品中46种杀虫剂残留的分析方法。样品加水分散后,用乙腈提取,HMR-Lipid固相萃取柱净化,经XSelect HSS T3色谱柱分离,以甲醇和水为流动相进行梯度洗脱,基质匹配标准曲线外标法定量。结果表明,46种杀虫剂在各自线性范围内线性关系良好,相关系数大于0.995,定量限为1.0~10.0μg/kg;以猪肉、猪肾、鸡蛋、牛奶为基质,在定量限、10倍定量限、50倍定量限加标水平下的回收率为65%~110%,相对标准偏差为1.9%~10.6%。该方法高效便捷,定量准确,适用于畜禽肉及内脏、蛋类、生乳等动物源性食品中46种杀虫剂残留的快速定量检测。 展开更多
关键词 杀虫剂 动物源性食品 通过式固相萃取净化 超高效液相色谱-串联质谱 快速测定
在线阅读 下载PDF
通过式固相萃取-超高效液相色谱-串联质谱法测定沉积物中草铵膦、草甘膦及其代谢物 被引量:3
12
作者 杨霄 谢仲桂 +3 位作者 李小玲 索纹纹 陈相艺 万译文 《色谱》 北大核心 2025年第2期155-163,共9页
建立了通过式固相萃取-超高效液相色谱-串联质谱法测定沉积物中草铵膦、草甘膦及其6种代谢物(3-甲基磷酸亚基丙酸、N-乙酰草铵膦、氨甲基膦酸、N-乙酰氨甲基膦酸、N-乙酰草甘膦、N-甲基草甘膦)的方法。样品采用4%(体积分数)氨水溶液提取... 建立了通过式固相萃取-超高效液相色谱-串联质谱法测定沉积物中草铵膦、草甘膦及其6种代谢物(3-甲基磷酸亚基丙酸、N-乙酰草铵膦、氨甲基膦酸、N-乙酰氨甲基膦酸、N-乙酰草甘膦、N-甲基草甘膦)的方法。样品采用4%(体积分数)氨水溶液提取,提取液经PRiME HLB固相萃取柱净化,过0.22μm聚醚砜滤膜后供超高效液相色谱-串联质谱测定。目标化合物使用Metrosep A Supp 5阴离子色谱柱(150 mm×4.0 mm,5μm)分离,以水和200 mmol/L碳酸氢铵溶液(含0.05%(v/v)氨水)作为流动相进行梯度洗脱,在电喷雾离子源(ESI)、负离子扫描和多反应监测(MRM)模式下进行测定,基质匹配外标法定量。结果表明,草铵膦、草甘膦及其代谢物在15 min内即可完成色谱分离,色谱峰形良好,响应值高,目标化合物在2.0~200.0μg/L范围内线性关系良好,相关系数均大于0.995。草铵膦、3-甲基磷酸亚基丙酸、N-乙酰草铵膦、N-乙酰氨甲基膦酸、N-乙酰草甘膦、N-甲基草甘膦的检出限为5μg/kg,定量限为20μg/kg;草甘膦、氨甲基膦酸的检出限为10μg/kg,定量限为30μg/kg。以空白沉积物为基质样品,在3个加标水平(定量限、5倍定量限和10倍定量限)下,低有机质含量的沉积物中目标化合物的平均回收率为78.5%~107%,相对标准偏差为1.32%~14.7%(n=6);高有机质含量的沉积物中目标化合物的平均回收率为76.4%~113%,相对标准偏差为2.60%~11.2%(n=6)。采用本方法对池塘、湖泊、水库、河流等不同类型的沉积物样品进行测定,结果显示,湖泊、水库、河流沉积物样品中未检出草铵膦、草甘膦及其代谢物,1个池塘沉积物样品中检出草甘膦和氨甲基膦酸,检出含量分别为31.7μg/kg和52.3μg/kg。本研究建立的方法具有简单、快速、绿色环保、准确度和灵敏度高、重复性好等优势,适用于沉积物中草铵膦、草甘膦及其代谢物的快速检测,为研究其在沉积物中的残留特征和环境行为提供了技术支持。 展开更多
关键词 超高效液相色谱-串联质谱 通过式固相萃取 草铵膦 草甘膦 代谢物 沉积物 非衍生化
在线阅读 下载PDF
不确定性冲击对中国实体经济的非对称传递效应——基于总量和结构双重视角的经验证据
13
作者 刘金全 袁月 杨光 《吉林大学社会科学学报》 北大核心 2025年第4期63-78,283,共17页
文章采用高维因子模型分离并识别来自中国经济、金融和政策层面的不确定性冲击;在此基础上,从总量和结构的双重视角出发,基于NARDL模型考察中国各类不确定性冲击对实体经济增长以及三次产业经济增长的非对称传递效应。研究结果表明:从... 文章采用高维因子模型分离并识别来自中国经济、金融和政策层面的不确定性冲击;在此基础上,从总量和结构的双重视角出发,基于NARDL模型考察中国各类不确定性冲击对实体经济增长以及三次产业经济增长的非对称传递效应。研究结果表明:从总量视角来看,中国经济、金融不确定性上升的经济抑制效果明显强于不确定性下降的经济提振效果,短期内政策不确定性的上升在一定程度上能够起到刺激经济增长的作用,而长期内政策不确定性则表现出明显的“逆周期性”;从结构视角来看,不同层面的不确定性对三次产业经济存在显著的非均衡性影响,经济、金融不确定性的上升会导致产业供需结构的扭曲和产业经济衰退的加剧,而劳动密集型产业则表现出对政策不确定性冲击的抵御作用。 展开更多
关键词 经济不确定性 金融不确定性 政策不确定性 非对称传递效应 NARDL模型
原文传递
湖北燕矶长江大桥猫道设计方案研究
14
作者 赵全成 张栋 蒋本俊 《桥梁建设》 北大核心 2025年第4期10-17,共8页
湖北燕矶长江大桥为主跨1860 m的内外缆不同垂度四主缆体系双层钢桁梁悬索桥,具有高低四缆、双缆窄距、小垂跨比、超大跨度、并联索鞍等特点,该桥猫道横向布置困难、索力大、布索空间小、过塔困难、抗风复杂。针对上述问题,提出一种三... 湖北燕矶长江大桥为主跨1860 m的内外缆不同垂度四主缆体系双层钢桁梁悬索桥,具有高低四缆、双缆窄距、小垂跨比、超大跨度、并联索鞍等特点,该桥猫道横向布置困难、索力大、布索空间小、过塔困难、抗风复杂。针对上述问题,提出一种三跨连续式非对称猫道设计方案。猫道采用等宽非对称断面布置,保证猫道面层、天桥施工效率的同时解决了双缆窄距带来的猫道横向布置难题;猫道承重索采用Φ60 mm标准抗拉强度2160 MPa高强度钢丝绳,减少承重索数量,结合双层承重索受力体系,有效解决了索力大及布索空间小的难题;猫道承重索采用穿塔方案,消除了并联索鞍带来的过塔难题;内、外缆猫道之间设置横向阻尼抗风装置及制振索,大幅降低了内、外缆猫道之间碰撞风险,提升了猫道使用的安全性与舒适性。 展开更多
关键词 悬索桥 不同垂度四主缆 猫道 等宽非对称断面 双层承重索 穿塔方案 抗风措施 结构设计
在线阅读 下载PDF
综放工作面过空巷超前支护技术研究与应用 被引量:3
15
作者 王栋晨 孙华清 +6 位作者 冯伟斌 王代峰 秦艳华 陈井龙 吕金龙 李然 曹峰 《中国煤炭》 北大核心 2025年第1期132-145,共14页
在遗煤复采过程中,工作面前方常存在与其推进方向交叉的空巷,为提高过空巷时辅运巷和回风巷围岩的安全稳定,实现煤炭的安全高效开采,在长壁放顶煤过空巷的开采基础上,结合SolidWorks、Rhino-Griddle、FLAC 3D软件,建立了液压支架支护、... 在遗煤复采过程中,工作面前方常存在与其推进方向交叉的空巷,为提高过空巷时辅运巷和回风巷围岩的安全稳定,实现煤炭的安全高效开采,在长壁放顶煤过空巷的开采基础上,结合SolidWorks、Rhino-Griddle、FLAC 3D软件,建立了液压支架支护、锚杆支护、锚杆+支架支护这3种不同的超前支护方式,对比分析了3种超前支护方式对围岩矿压及变形的影响,并给出了最优支护方式,同时探讨了过空巷时液压支架的承载特征。研究结果表明,邻近空巷时,液压支架支护方式能有效分担两帮压力和控制围岩变形,但在巷道顶部会出现开采扰动和空巷的应力叠加;锚杆支护方式通过破坏围岩的几何形态对两者的叠加效果进行了有效减弱,但围岩变形控制较差;锚杆+支架支护方式综合两者优势,支护效果最好。 展开更多
关键词 综放工作面 超前支护 过空巷 围岩变形 数值模拟
在线阅读 下载PDF
贵阳抽水蓄能电站水库淤积对过机泥沙的影响研究 被引量:3
16
作者 王凯旋 何鑫 +3 位作者 陈倩柔 余明辉 李大成 李思宇 《泥沙研究》 北大核心 2025年第1期75-80,共6页
抽水蓄能电站是我国重要的能源基础设施,上下库水流泥沙不断交换、相互影响,导致库容损失和电站水轮机磨损。以贵阳抽水蓄能电站为例,基于考虑上下库水流泥沙交换的一维水沙数学模型,研究电站过机含沙量变化规律与下水库泥沙淤积时空分... 抽水蓄能电站是我国重要的能源基础设施,上下库水流泥沙不断交换、相互影响,导致库容损失和电站水轮机磨损。以贵阳抽水蓄能电站为例,基于考虑上下库水流泥沙交换的一维水沙数学模型,研究电站过机含沙量变化规律与下水库泥沙淤积时空分布的相关关系,并讨论了进出水口附近清淤对过机泥沙的影响。电站下水库淤积分布为带状-三角洲淤积,过机含沙量随下库淤积发展而增加,且与水库来沙量呈良好的正相关关系。进出水口附近实施清淤措施后,泥沙在该区域回淤,下水库淤积量增加,过机含沙量明显减小。 展开更多
关键词 水库泥沙 抽水蓄能电站 下水库淤积 过机含沙量 清淤措施
原文传递
综采工作面过空巷群围岩变形及破坏规律研究 被引量:2
17
作者 陈勇 赵瑞 +3 位作者 武振 苏丽君 杨峰 孙强 《中国矿业》 北大核心 2025年第1期154-163,共10页
复杂地质条件矿井煤层无序开采导致大量空巷群遗留,综采工作面过邻近空巷群过程中面临矿压显现规律复杂、围岩控制难的问题。为研究综采工作面过空巷群围岩变形及破坏规律,采用数值模拟方法,研究了南屯煤矿93下21工作面同层空巷、穿层... 复杂地质条件矿井煤层无序开采导致大量空巷群遗留,综采工作面过邻近空巷群过程中面临矿压显现规律复杂、围岩控制难的问题。为研究综采工作面过空巷群围岩变形及破坏规律,采用数值模拟方法,研究了南屯煤矿93下21工作面同层空巷、穿层空巷、下伏空巷开采前后围岩位移、应力及塑性区变化规律。结果表明:空巷破坏主要影响因素为空巷与煤层的层位关系、空巷距煤层距离、空巷角度变化。当空巷距煤层小于5 m时,空巷破坏严重,当空巷距煤层大于5 m时,空巷变形逐渐减小,当空巷距煤层大于10 m时,空巷受采动影响较小。空巷拐角处易产生应力集中现象。针对不同类型空巷提出工作面调斜、局部充填、加强支护过空巷措施;实测结果表明,液压支架工作阻力及煤岩体应力较为稳定,空巷围岩控制效果较好。该研究成果可以为类似综采工作面安全通过空巷群提供借鉴。 展开更多
关键词 空巷群 围岩变形 数值模拟 过空巷措施 FLAC3D软件
在线阅读 下载PDF
国医大师洪广祥温通并用治疗慢性肺源性心脏病经验 被引量:2
18
作者 张芬芬 李可可 +2 位作者 严诏琦 谢荣芳 兰智慧 《中华中医药杂志》 北大核心 2025年第2期688-691,共4页
慢性肺源性心脏病是呼吸系统常见疾病,其病因病机复杂,病程缠绵。国医大师洪广祥教授认为慢性肺源性心脏病的基本病机为本虚标实,以阳气虚衰为本,痰、瘀、水为标,且彼此常相互影响,形成虚实夹杂、因虚致实之证候。文章从“辨病机,察虚... 慢性肺源性心脏病是呼吸系统常见疾病,其病因病机复杂,病程缠绵。国医大师洪广祥教授认为慢性肺源性心脏病的基本病机为本虚标实,以阳气虚衰为本,痰、瘀、水为标,且彼此常相互影响,形成虚实夹杂、因虚致实之证候。文章从“辨病机,察虚实之本质”“论治法,述温通之优势”两方面叙述洪广祥教授在治疗肺源性心脏病时重在温通并用、补虚泻实、标本兼顾。 展开更多
关键词 洪广祥 慢性肺源性心脏病 温通并用 补虚泻实 名医经验
原文传递
双线盾构下穿超大型铁路编组站地表沉降控制及敏感参数分析 被引量:1
19
作者 李金武 邵唐砂 张聪 《铁道建筑》 北大核心 2025年第7期103-110,共8页
双线盾构隧道施工过程引起的地表沉降会对周边建(构)筑物造成损害。以郑州地铁8号线盾构隧道下穿郑州北编组站工程为背景,选用Mohr-Coulomb本构模型进行下穿施工的数值模拟,研究隧道开挖对地层竖向位移和地表沉降的影响,以有效控制下穿... 双线盾构隧道施工过程引起的地表沉降会对周边建(构)筑物造成损害。以郑州地铁8号线盾构隧道下穿郑州北编组站工程为背景,选用Mohr-Coulomb本构模型进行下穿施工的数值模拟,研究隧道开挖对地层竖向位移和地表沉降的影响,以有效控制下穿施工对编组站的影响。选取铁路路基弹性模量和盾构同步注浆浆液的弹性模量作为变量,对地层沉降进行参数敏感性分析。结果表明:隧道中心线两侧8 m范围内地层沉降显著,最大沉降约4.46 mm。参数分析显示,浆液弹性模量从10 MPa增至20 MPa时,路基最大沉降降低14.2%,浆液弹性模量增至30 MPa时路基最大沉降减小的效果不再显著;路基弹性模量从200 MPa增至500 MPa时,地表沉降仅降低5.4%,而当路基弹性模量增至1 000 MPa后地表沉降降幅更小。浆液弹性模量为沉降控制一级敏感参数,路基弹性模量为二级敏感参数。 展开更多
关键词 盾构隧道 下穿铁路 掘进施工 地表沉降 敏感参数 同步注浆
在线阅读 下载PDF
灵活性调节煤电机组成本疏导的三部制电价机制分析 被引量:1
20
作者 汪悦萍 谭青博 +2 位作者 赵洱岽 谭忠富 吴学辉 《中国电力》 北大核心 2025年第7期217-226,共10页
为应对新能源高比例接入引发的电网安全稳定运行风险及电力平衡难题,促进新能源有效消纳,缓解负荷峰谷矛盾,提出一种基于煤电机组功能定位的三部制电价机制。首先,分析新型电力系统下煤电机组提供的基础电力保障、新能源消纳、辅助服务... 为应对新能源高比例接入引发的电网安全稳定运行风险及电力平衡难题,促进新能源有效消纳,缓解负荷峰谷矛盾,提出一种基于煤电机组功能定位的三部制电价机制。首先,分析新型电力系统下煤电机组提供的基础电力保障、新能源消纳、辅助服务三大功能;然后,分析煤电机组成本构成;其次,依据煤电机组提供的电能价值、调节价值和容量价值构建三部制电价机制,按照不同路径进行成本疏导;最后,对煤电机组的成本疏导进行不同容量补贴比例与辅助服务价格的敏感性分析。结果显示,在煤价675元/t的基准上,煤价上涨30%情景下无容量补贴、30%补贴、50%补贴时煤电总度电成本分别为42.085分/(kW·h)、39.729分/(kW·h)、38.156分/(kW·h),相较于原煤价分别上涨20.9%、22.4%、23.6%。所提出的三部制电价机制可调动机组调峰积极性,保障机组备用容量充裕度,激励机组参与系统调频服务,充分激发煤电在电力市场中的活力。 展开更多
关键词 灵活性调节 煤电机组 成本疏导 辅助服务市场
在线阅读 下载PDF
上一页 1 2 56 下一页 到第
使用帮助 返回顶部