检索结果-南通市图书馆

Associations of big endothelin-1 and C-reactive protein in atrial fibrillation

Journal of Geriatric Cardiology 2016年第5期13卷 465-470页

作者： Li-Hui ZHENG Wei SUN Yan YAO bing-bo hou Yu QIAO Shu ZHANG State Key Laboratory of Cardiovascular Disease Clinical EP Lab & Arrhythmia Center Fuwai Hospital Beijing China

Background Atrial fibrillation （AF） is associated with inflammation and endothelial dysfunction. However, the association between inflammation （as indexed by high-sensitivity C-reactive protein, hs-CRP） and endothelial function [as indexed by big endothelin-1 （ET-1）] in AF patients remains unclear. Methods We enrolled 128 patients with lone AF, among which 83 had paroxysmal AF, and 45 had persistent AF. Eighty-two age- and gender-matched controls of paroxysmal supraventricular tachycardia without AF history were evaluated. Plasma hs-CRP, big ET-1 levels and other clinical characteristics were compared among the groups. Results Patients with persistent AF had higher hs-CRP concentrations than those with paroxysmal AF （P 〈 0.05）, both groups had higher hs-CRP level than controls （P 〈 0.05）. Patients with persistent AF had higher big ET-1 level than those with paroxysmal AF, although the difference did not reach the statistical significance （P 〉 0.05）, and both groups had higher big ET-1 levels than controls （P 〈 0.05）. Multiple regression analyses revealed hs-CRP as an inde- pendent determinant of AF （P 〈 0.001）. Further adjusted for big ET-1, both big ET-1 and hs-CRP were independent predictors for AF （P 〈 0.001）, but the odds ratio for hs-CRP in predicting AF attenuated from 8.043 to 3.241. There was a positive relation between hs-CRP level and big ET-1 level in paroxysmal AF patients （r = 0.563, P 〈 0.05）, however, the relationship in persistent AF patients was poor （r = 0.094, P 〈 0.05）. Conclusions both plasma hs-CRP and big ET-1 levels are elevated in lone AF patients, and are associated with AF. In paroxysmal lone AF patients, there were significant positive correlations between plasma hs-CRP level and big ET- 1 level.

关键词： Atrial fibrillation C-reactive protein Endothelin Inflammation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Fast rate （≥ 250 beats/min） right ventricular burst stimulation is useful for ventricular tachycardia induction in arrhythmogenic right ventricular cardiomyopathy

引用

Journal of Geriatric Cardiology 2016年第1期13卷 70-74页

作者： Ling-Min WU Jing-Ru BAO Yan YAO bing-bo hou Li-Hui ZHENG Shu ZHANG State Key Laboratory of Cardiovascular Disease Fuwai Hospital National Center for Cardiovascular Diseases Chinese Academy of Medical Sciences and Peking Union Medical College Beijing China Cardiovascular Center PLA Navy General Hospital Beijing China

Background One of the major challenges in arrhythmogenic right ventricular cardiomyopathy （ARVC） ablation is ventricular tachy-cardia （VT） non-inducibility. The study aimed to assess whether fast rate （≥ 250 beats/min） right ventricular burst stimulation was useful for VT induction in patients with *** Ninety-one consecutive ARVC patients with clinical sustained VT that underwent electro-physiological study were enrolled. The stimulation protocol was implemented at both right ventricular apex and outflow tract as follows： Step A, up to double extra-stimuli; Step B, incremental stimulation with low rate （＆lt; 250 beats/min）; Step C, burst stimulation with fast rate （≥ 250 beats/min）; Step D, repeated all steps above with intravenous infusion of *** A total of 76 patients had inducible VT （83.5%）, among which 49 were induced by Step C, 15 were induced by Step B, 8 and 4 by Step A and D, respectively. Clinical VTs were induced in 60 patients （65.9%）. Only two spontaneously ceased ventricular fibrillations were induced by Step C. Multivariate analysis showed that a narrower baseline QRS duration under sinus rhythm was independently associated with VT non-inducibility （OR： 1.1; 95% CI： 1.0-1.1;P = 0.019）.ConclusionFast rate （≥ 250 beats/min） right ventricular burst stimulation provides a useful supplemental method for VT induction in ARVC patients.

关键词： Burst stimulation Cardiomyopathy Right ventricular Ventricular tachycardia

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

0Optimized Fluoroscopy Setting and Appropriate Project Position Can Reduce X-ray Radiation Doses Rates during Electrophysiology Procedures

引用

Chinese Medical Journal 2015年第9期128卷 1151-1153页

作者： bing-bo hou Yan Yao Ling-Min Wu Yu Qiao Li-Hui Zheng Li-Gang Ding Gang Chen State Key Laboratory of Cardiovascular Disease Fuwai Hospital National Center for Cardiovascular Diseases Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100037 China

Background：Nonfluoroscopic three-dimensional electroanatomical system is widely used nowadays,but X-ray remains indispensable for complex electrophysiology *** study aimed to evaluate the value of optimized parameter setting and different projection position to reduce X-ray radiation dose ***：From June 2013 to October 2013,105 consecutive patients who underwent complex ablation were enrolled in the *** the ablation,the radiation dose rates were measured by two different settings （default setting and optimized setting） with three projection positions （posteroanterior [PA] projection;left anterior oblique [LAO] 30° projection;and LAO 45° projection）.The parameter of preset voltage,pulse width,critical voltage,peak voltage,noise reduction,edge enhancement,pulse rate,and dose per frame was modified in the optimized ***：The optimized setting reduced radiation dose rates by 87.5％（1.7 Gy/min vs.13.6 Gy/min,P ＜ 0.001） in PA,87.3％（2.5 Gy/min vs.19.7 Gy/min,P＜0.001） in LAO 30°,85.9％（3.1 Gy/min vs.22.1 Gy/min,P ＜ 0.001） in LAO 45°.Increase the angle of projection position will increase the radiation dose ***：We can reduce X-ray radiation dose rates by adjusting the parameter setting of X-ray *** oblique projection of large angle is another way to reduce X-ray radiation dose rates.

关键词： Ablation Fluoroscopy Projection Position Radiation Dose

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Solution‑Processed Thin Film Transparent Photovoltaics:Present Challenges and Future Development

引用

Nano-Micro Letters 2025年第2期17卷 566-600页

作者： Tianle Liu Munerah M.S.Almutairi Jie Ma Aisling Stewart Zhaohui Xing Mengxia Liu bo hou Yuljae Cho UM-SJTU Joint Institute Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China School of Physics and Astronomy Cardiff UniversityCardiff CF243AAWalesUK Department of Electrical and Computer Engineering Yale UniversityNew HavenCT 06511USA Energy Sciences Institute Yale UniversityWest HavenCT 06516USA Future Photovoltaics Research Center Global Institute of Future TechnologyShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

Electrical energy is essential for modern society to sustain economic *** soaring demand for the electrical energy,together with an awareness of the environmental impact of fossil fuels,has been driving a shift towards the utilization of solar ***,traditional solar energy solutions often require extensive spaces for a panel installation,limiting their practicality in a dense urban *** overcome the spatial constraint,researchers have developed transparent photovoltaics(TPV),enabling windows and facades in vehicles and buildings to generate electric *** TPV advancements are focused on improving both transparency and power output to rival commercially available silicon solar *** this review,we first briefly introduce wavelength-and non-wavelengthselective strategies to achieve *** of merit and theoretical limits of TPVs are discussed to comprehensively understand the status of current TPV *** we highlight recent progress in different types of TPVs,with a particular focus on solution-processed thin-film photovoltaics(PVs),including colloidal quantum dot PVs,metal halide perovskite PVs and organic *** applications of TPVs are also reviewed,with emphasis on agrivoltaics,smart windows and ***,current challenges and future opportunities in TPV research are pointed out.

关键词： Transparent semiconductors Solution-processable transparent solar cell Emerging solar cell materials Buildingintegrated photovoltaics

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Microscopic study of ultrasound-mediated microbubble destruction effects on vascular smooth muscle cells

引用

Asian Pacific Journal of Tropical Medicine 2015年第4期8卷 325-329页

作者： bo Zhang Yi-Rong hou Tian Chen bing Hu Department of Ultrasound Medicine East HospitalSchool of MedicineTongji University Department of Ultrasound 6th People's Hospital Affiliated to Shanghai Jiaotong University

Objective:To observe vascular smooth muscle cell morphological changes induced by ultrasound combined with microbubbles by Atomic Force Acoustic Microscopy(AFAM).Methods:A7r5 rat aortic smooth muscle cells were divided into groups:control group(without ultrasonic irradiation,no micro bubbles)and US+MB group(45 kHz、0.4 W/cm^2 ultrasound irradiate for 20 seconds with a SonoVuc^(TM)concentration of[(56-140)×10~5/mL].Cell micromorphological changes(such as topographic and acoustic prognosis)were detected,before and after ultrasound destruction by ***:In cell morphology,smooth muscle cells were spread o and connected to each another by *** the center of the cell,the nuclear area had a rough surface and was significantly elevated from its *** cytoskeletal structure of the reticular nucleus and cytoplasm in the morphology of A7r5 cells(20μm×20μm)were clear before microbubble *** acoustic exciting,the cell structure details of the acoustic image were improved with better resolution,showing the elasticity of different *** the acoustic image,the nucleus was harder,more flexible and uneven compared with the *** strong various-sized echo particles were stuck on the rough nuclear membrane's substrate *** nuclear membrane did not have a continuous smooth surface;there were many obstructions(pores).After ultrasound-intervention was combined with microbubbles,the dark areas of the A7r5 cell images was increased in various sizes and *** dark areas showed the depth or low altitudes of the lower regions,suggesting regional ***,the location and scope of the acoustic image dark areas were not similar to those found in the topographic ***,it was likely that the dark areas,both from the topographic and acoustic images,were *** addition,some cell nuclei become round in different degrees after ***:Atomic force microscopy and acoustic excitation method can

关键词： Atomic force acoustic microscopy Vascular smooth muscle cell Ultrasound Microbubble

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Affine A_3^((1)) N=2 Monopole as the D Module and Aftine ADHMN Sheaf

引用

Communications in Theoretical Physics 2008年第2期49卷 439-450页

作者： hou bo-Yu hou bo-Yuan Institute of Modern Physics Northwest University Xi＇an 710069 China Graduate School the Chinese Academy of Sciences Beijing 100049 China

A Higgs-Yang-Mills monopole scattering spherical symmetrically along light cones is given. The left incoming anti-self-dual α plane fields are holomorphic, but the right outgoing SD β plane fields are antiholomorphic, meanwhile the diffeomorphism symmetry is preserved with mutual inverse afiine rapidity parameters μ and μ^-1. The Dirac wave function scattering in this background also factorized respectively into the （anti）holomorphic amplitudes. The holomorphic anomaly is realized by the center term of a quasi Hopf algebra corresponding to an integrable conformal affine massive field. We find explicit Nahm transformation matrix （Fourier Mukai transformation） between the Higgs YM BPS （fiat） bundles （1） modules） and the affinized blow up ADHMN twistors （perverse sheafs）. Thus we establish the algebra for the ＇t Hooft Hecke operators in the Hecke correspondence of the geometric Langlands program.

关键词： affine BPS monopole affinized ADHMN sheaf affinized Nahm transformation 't Hooft-Hecke operator geometric Langlands program

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Fractures interaction and propagation mechanism of multi-cluster fracturing on laminated shale oil reservoir

引用

Petroleum Science 2024年第4期21卷 2600-2613页

作者： Jia-Xin Lv bing hou Department of Petroleum Engineering China University of Petroleum(Beijing)at KaramayKaramay834000XinjiangChina Key Laboratory of Petroleum Engineering Ministry of EducationChina University of Petroleum(Beijing)Beijing102249China State Key Laboratory of Petroleum Resources and Engineering China University of Petroleum(Beijing)Beijing102249China

The continental shale reservoirs of Jurassic Lianggaoshan Formation in Sichuan Basin contain thin lamina,which is characterized by strong plasticity and developed longitudinal shell limestone *** improve the production efficiency of reservoirs by multi-cluster fracturing,it is necessary to consider the unbalanced propagation of hydraulic fractures and the penetration effect of *** paper constructed a numerical model of multi-fracture propagation and penetration based on the finite element coupling cohesive zone method;considering the construction cluster spacing,pump rate,lamina strength and other parameters studied the influencing factors of multi-cluster fracture interaction propagation;combined with AE energy data and fracture mode reconstruction method,quantitatively characterized the comprehensive impact of the strength of thin interlayer rock interfaces on the initiation and propagation of fractures that penetrate layers,and accurately predicted the propagation pattern of hydraulic fractures through laminated shale oil *** results revealed that in the process of multi-cluster fracturing,the proportion of shear damage is low,and mainly occurs in bedding fractures activated by outer *** the cluster spacing enhances the fracture system's penetration ability,though it lowers the activation efficiency of *** high plasticity of the limestone interlayer may impact the vertical propagation distance of the main *** the interface strength is beneficial to the reconstruction of the fracture height,but the interface communication effect is *** selection of layers with moderate lamina strength for fracturing stimulation,increasing the pump rate during fracturing and setting the cluster spacing reasonably are beneficial to improve the effect of reservoir stimulation.

关键词： Laminated shale Multi-cluster fracturing Cross-layer Cohesive zone model Acoustic emission technique

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Near-inertial waves in the wake of 2011 Typhoon Nesat in the northern South China Sea

引用

Acta Oceanologica Sinica 2014年第11期33卷 102-111页

作者： YANG bing hou Yijun Institute of Oceanology Chinese Academy of Sciences Key Laboratory of Chinese Academy of Sciences for Ocean Circulation and Waves Institute of Oceanology University of Chinese Academy of Sciences

In September 2011, Typhoon Nesat passed over a moored array of instruments recording current and temperature in the northern South China Sea（SCS）. A wake of baroclinic near-inertial waves（NIWs） commenced after Nesat passed the array. The associated near-inertial currents are surface-intensified and clockwise-polarized. The vertical range of NIWs reached 300 m, where the vertical range is defined as the maximum depth of the horizontal near-inertial velocity 5 cm/s. The current oscillations have a frequency of 0.709 9 cycles per day（cpd）, which is 0.025 f higher than the local inertial frequency. The NIWs have an e-folding time-scale of 10 d based on the evolution of the near-inertial kinetic energy. The depth-leading phase of near-inertial currents indicates downward group velocity and energy flux. The estimated vertical phase velocity and group velocity are 0.27 and 0.08 cm/s respectively, corresponding to a vertical wavelength of 329 m. A spectral analysis reveals that NIWs act as a crucial process to redistribute the energy injected by Typhoon Nesat. A normal mode and an empirical orthogonal function analysis indicate that the second mode has a dominant variance contribution of 81%, and the corresponding horizontal phase velocity and wavelength are 3.50 m/s and 420 km respectively. The remarkable large horizontal phase velocity is relevant to the rotation of the earth, and a quantitative analysis suggests that the phase velocity of the NIWs with a blue-shift of 0.025 f overwhelms that of internal gravity waves by a factor of 4.6.

关键词： near-inertial waves South China Sea Typhoon Nesat

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A Dual-Satellite GNSS Positioning Algorithm of High Accuracy in Incomplete Condition

引用

China Communications 2016年第10期13卷 58-68页

作者： bing hou Xiaolin Zhang Shanghai Engineering Center for Microsatellites Shanghai 201203 China Beihang University Beijing 100191 China

Global navigation satellite system could provide accurate positioning results in signal complete condition. However, the performance is severe when signal denied, especially for the single-mode Bei Dou receiver. This paper proposes a dual-satellite positioning algorithm to promote the positioning performance in the satellite signal gap. The new algorithm utilizes the previous positioning data stored in complete condition to simplify the positioning equations. As the clock bias persists for a short period, this proposed method could work out accurate positioning results by only two visible satellites, without the need of computing the clock bias. Also, the Kalman filtering algorithm is used to smooth the trajectories, and improve the positioning results. During the incomplete period, only two satellites for 30 seconds and three satellites for 60 seconds, the preliminary experiment result shows that, the presented method could provide almost the same positioning results as in complete condition.

关键词： Bei Dou navigation satellite system incomplete condition dual-satellite positioning algorithm kalman filtering

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Eigenvalues under the Backward Ricci Flow on Locally Homogeneous Closed 3-manifolds

引用

Acta Mathematica Sinica,English Series 2018年第7期34卷 1179-1194页

作者： Song bo hou Department of Applied Mathematics College of Science China Agricultural University

In this paper, we study the evolving behaviors of the first eigenvalue of the Laplace- Beltrami operator under the normalized backward Ricci flow, construct various quantities which are monotonic under the backward Ricci flow and get upper and lower bounds. We prove that in cases where the backward Ricci flow converges to a sub-Riemannian geometry after a proper rescaling, the eigenvalue evolves toward zero.

关键词： Homogeneous 3-manifold backward Ricci flow eigenvalue estimate

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：