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SOME SUPERCONVERGENCE RESULTS OF WILSON-LIKE ELEMENTS

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Journal of Computational Mathematics 1998年第1期16卷 81-96页

作者： Zhang, L Li, lk Fudan Univ Inst Math Shanghai 200433 Peoples R China Shangdong Min Inst Dept Math Taian Peoples R China Fudan Univ Dept Math Shanghai 200433 Peoples R China

In this paper, the superconvergence of a class of Wilson-like elements is considered. A superconvergent estimate on the centers of elements and some superconvergence recoveries on the four vertices and the four midpoi... 详细信息

关键词： superconvergence Wilson-like element

Influence of Indian mustard (Brassica juncea) on rhizosphere soil solution chemistry in long-term contaminated soils:A rhizobox study

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Journal of Environmental Sciences 2010年第1期22卷 98-105页

作者： Kwon-Rae Kim Gary Owens Soon-lk Kwon Climate Change & Agroecology Division Department of Agricultural EnvironmentNational Academy of Agricultural ScienceRDARepublic of Korea Centre for Environmental Risk Assessment and Remediation University of South Australia

This study investigated the influence of Indian mustard （Brassicajuncea） root exudation on soil solution properties （pH, dissolved organic carbon （DOC）, metal solubility） in the rhizosphere using a rhizobox. Measurement was conducted following the cultivation of Indian mustard in the rhizobox filled four different types of heavy metal contaminated soils （two alkaline soils and two acidic soils）. The growth of Indian mustard resulted in a significant increase （by 0.6 pH units） in rhizosphere soil solution pH of acidic soils and only a slight increase （〈 0.1 pH units） in alkaline soils. Furthermore, the DOC concentration increased by 17-156 mg/L in the rhizosphere regardless of soil type and the extent of contamination, demonstrating the exudation of DOC from root. Ion chromatographic determination showed a marked increase in the total dissolved organic acids （OAs） in rhizosphere. While root exudates were observed in all soils, the amount of DOC and OAs in soil solution varied considerably amongst different soils, resulting in significant changes to soil solution metals in the rhizosphere. For example, the soil solution Cd, Cu, Pb, and Zn concentrations increased in the rhizosphere of alkaline soils compared to bulk soil following plant cultivation. In contrast, the soluble concentrations of Cd, Pb, and Zn in acidic soils decreased in rhizosphere soil when compared to bulk soils. Besides the influence of pH and DOC on metal solubility, the increase of heavy metal concentration having high stability constant such as Cu and Pb resulted in a release of Cd and Zn from solid phase to liquid phase.

关键词： dissolved organic carbon heavy metals root exudates solubility rhizosphere chemistry

Interface Characterization of the SiCp/Al Composites Made by Powder Metallurgy

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Journal of Materials Science & Technology 1999年第2期15卷 147-150页

作者： Fan, JZ Zhang, K Shi, lk Zhang, SM Gen Res Inst NonFerrous Met Beijing 100088 Peoples R China

The interface of the SiCp/Al composites produced by powder metallurgy processing involving hot-pressing above the matrix solidus temperature has been investigated by means of TEM. Several kinds of interfaces between the reinforcements and the matrix in the composite, including the clean interfaces, the faceted interfaces and the slight reaction interfaces, are presented. And most of interfaces belong to the slight reaction interfaces which are composed of the Al with different orientation from the Al matrix near the interface zone and particle-like substances produced by MgAl2O4 spinels and impurities.

关键词： Metallic matrix composites

Improving outcomes in geriatric surgery:Is there more to the equation?

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World Journal of Clinical Cases 2022年第13期10卷 4321-4323页

作者： Serene Si Ning Goh Clement lk Chia Department of General Surgery Khoo Teck Puat HospitalSingapore 768828Singapore

The era of geriatric surgery has arrived with increased global life *** need to optimize outcomes in this group of patients goes beyond traditional outcomes such as postoperative morbidity and mortality *** risk factors that impact adverse surgical outcomes such as frailty and sarcopenia,individualizing optimization strategies such as prehabilitation and a multidisciplinary geriatric surgical service have been shown to improve postoperative outcomes and help the older surgical patient regain premorbid function and maintain quality of *** needs to be a concerted effort to increase awareness of this increasingly important topic in practicing surgeons around the world to meet the challenges of the aging population.

关键词： Geriatric surgery Risk factors Prehabilitation Surgical outcomes Frailty

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分形信号估计的最佳子波门限方法

电子学报 1998年第4期26卷 15-18页

作者：梅文博 Shar.,lk 北京理工大学电子工程系

本文提出了一种基于奈曼－皮尔逊（Ｎｅｙｍａｎ－Ｐｅａｒｓｏｎ）准则和最小均方误差准则的、估计淹没在加性白高斯噪声中的ｌ／ｆ类分形信号的最佳子波门限方法．计算机仿真结果证明了该方法的可行性和有效性．

关键词：分形信号 1/f噪声信号估计子波变换

Patients with culture negative pyogenic liver abscess have the same outcomes compared to those withKlebsiella pneumoniae pyogenic liver abscess

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Hepatobiliary & Pancreatic Diseases International 2016年第5期15卷 504-511页

作者： Vishal G Shelat Qiao Wang Clement lk Chia Zhongkai Wang Jee Keem Low Winston WL Woon Department of General Surgery Tan Tock Seng Hospital Singapore 308433 Singapore Ministry of Health Holdings Pte Ltd. Singapore 099253 Singapore

BACKGROUND: Etiologic organism is not frequently isolated despite multiple blood and lfuid cultures during management of pyogenic liver abscess (PLA). Such culture negative pyogen-ic liver abscess (CNPLA) is routinely managed by antibiotics targeted toKlebsiella pneumoniae. In this study, we evaluated the outcomes of such clinical practice. METHODS: All the patients with CNPLA andKlebsiella pneu-moniaePLA (KPPLA) admitted from January 2003 to Decem-ber 2011 were included in the study. A retrospective review of medical records was performed and demographic, clinical and outcome data were collected. RESULTS: A total of 528 patients were treated as CNPLA or KPPLA over the study period. CNPLA presented more com-monly with abdominal pain (P=0.024). KPPLA was more com-mon in older age (P=0.029) and was associated with thrombo-cytopenia (P=0.001), elevated creatinine (P=0.002), bilirubin (P=0.001), alanine aminotransferase (P=0.006) and C-reactive protein level (P=0.036). CNPLA patients tend to have anemia (P=0.015) and smaller abscess (P=0.008). There was no differ-ence in hospital stay (15.7 vs 16.8 days) or mortality (14.0% vs 11.0%). No patients required surgical drainage after initiation of medical therapy. CONCLUSION: Despite demographic and clinical differences between CNPLA and KPPLA, overall outcomes are not different.

关键词： culture negative Klebsiella pneumoniae pyogenic liver abscess

Global Existence, Uniqueness of Weak Solutions and Determining Functionals for Nonlinear Wave Equations

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Advances in Pure Mathematics 2013年第5期3卷 451-457页

作者： ülkü Dinlemez Department of Mathematics Gazi University Ankara Turkey

We consider the initial-boundary value problem for a nonlinear wave equation with strong structural damping and nonlinear source terms in IR. We prove the global existence and uniqueness of weak solutions of the problem and then we will study the determining modes on the phase space by using energy methods and the concept of the completeness defect.

关键词： Global Existence Uniqueness Determining Modes

Risk of pacemaker implantation after femur fracture in patients with and without a history syncope: a Danish nationwide registry-based follow-up study

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Journal of Geriatric Cardiology 2022年第9期19卷 712-718页

作者： Sara lk Clemmensen Kristian Kragholm Bhupendar Tayal Christian Torp-Pedersen Søren Kold Peter Søgaard Sam Riahi Department of Cardiology Aalborg University HospitalAalborgDenmark Unit of Clinical Biostatistics and Epi-demiology Aalborg University HospitalAalborgDenmark Department of Clinical Epidemiology Aalborg University HospitalAalborgDenmark Department of Orthopedics Aalborg University HospitalAalborgDenmark Depart-ment of Clinical Institute Aalborg University HospitalAalborgDenmark

BACKGROUND It has previously been described that fall-associated injuries including fractures are commonly observed among patients with ***,knowledge on the risk of pacemaker implantation after admission due to femur fracture from large population-based epidemiologic data is ***,we investigated the risk of pacemaker implanta-tion following femur fracture in patients with and without a history of previous *** All patients with femur fracture between 2005-2017 were identified using the Danish Nationwide Patient *** these,patients already having a pacemaker were *** outcome was one-year risk of pacemaker implanta-tion and secondary outcome was one-year all-cause *** logistic regression was used to obtain absolute and relative risks of the study endpoint in relation to patients with versus without history of syncope and standardized to the age,sex,selected comorbidity and pharmacotherapy distribution of all *** Of 93,093 patients with femur fracture,5508(5.9%)had a history of syncope within five *** with prior syn-cope were slightly older(84 vs.83 years),more often male(33.6%vs.29.4%),and had more often comorbidities relative to those without history of ***-cause mortality was significantly higher among those with previous history of syncope com-pared to those without previous syncope(29.9%vs.28.6%,P=0.021).The relative mortality risk was 1.05(95%CI:1.01−1.09,P=0.021).A total of 695(0.8%)patients underwent pacemaker implantation within 5 years following femur fracture,and a signific-antly higher proportion of patients with syncope had a pacemaker implanted within one year(1.6%vs.0.7%,P<0.001;relative risk,2.01[95%CI:1.55−2.46]).CONCLUSIONS In patients with femur fracture,a history of syncope was significantly associated with a higher one-year risk of pacemaker implantation.

关键词： patients syncope injuries

Ocular alignment and results of strabismus surgery in neurologically impaired children

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International Journal of Ophthalmology(English edition) 2012年第1期5卷 113-115页

作者： igdem lk Can Sibel Polat Meryem Yasar Bayazit ilhan Ayse Gl Koak Altintas Ministry of Health Ulucanlar Eye Education and Research Hospital 3rd Clinic AnkaraTurkey

AIM:To evaluate ocular alignment and surgical results of strabismus surgery in neurologically impaired children.· METHODS:Files of 33 neurologically impaired squint children were *** patients had cerebral palsy(CP),4 had CP with mental retardation,therest had mental-motor retardation of unknown *** refractions,type and angle of strabismus,surgeries performed were recorded.· RESULTS:Mean follow-up was 34.0±16.5 ***-three patients had esodeviation,the remaining had *** 19 patients,angle of deviations measured at different visits were highly *** patients with stable angle of deviations or with unstable but high angle deviations had horizontal muscle *** horizontal deviation decreased from 43.75±10,69 D to 12.83±8.38D with surgery.· CONCLUSION:In neurologically impaired strabismic children,surgery is effective in patients with stable deviations or unstable but high angle *** for surgery should be made after a long follow up period.

关键词： cerebral palsy mental-motor retardation strabismus