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PLD法制备高介电调谐率的纳米晶BZT薄膜

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电子元件与材料 2007年第1期26卷 46-48,51页

作者：唐新桂梁建烈农亮勤熊惠芳陈王丽华广西民族大学物理与电子工程学院广西南宁530006 广东工业大学物理与光电工程学院广东广州510006 香港理工大学应用物理系

用脉冲激光沉积工艺制备了Ba(ZrxTi1-x)O3(x=0.25,0.30简称BZT25和BZT30)介电薄膜。在650℃原位退火10 min,薄膜为(111)取向柱状生长的晶粒,取向度分别为0.45和0.75。BZT25和BZT30薄膜的平均晶粒尺寸分别为50 nm和60 nm。在室温、1 MHz... 详细信息

用脉冲激光沉积工艺制备了Ba(ZrxTi1-x)O3(x=0.25,0.30简称BZT25和BZT30)介电薄膜。在650℃原位退火10 min,薄膜为(111)取向柱状生长的晶粒,取向度分别为0.45和0.75。BZT25和BZT30薄膜的平均晶粒尺寸分别为50 nm和60 nm。在室温、1 MHz和3×105 V/cm条件下,BZT25的最大εr和调谐率分别达到563和65%,BZT30的最大εr和调谐率分别达到441和57%。薄膜为(111)取向生长,主要是基于薄膜与底电极Pt界面层立方相结构Pt3Ti的诱导,即(111)Pt3Ti和(111)BZT的晶格匹配。

关键词：无机非金属材料锆钛酸钡薄膜脉冲激光沉积柱状晶粒介电调谐特性探测优值

Influence of the aspect ratio on the endovascular treatment of intracranial aneurysms: A computational investigation

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Journal of Biomedical Science and Engineering 2012年第8期5卷 422-431页

作者： Abraham Yik-Sau tang Siu-Kai Lai Kar-Ming Leung Gilberto Ka-Kit Leung Kwok-Wing Chow Department of Mechanical Engineering University of Hong Kong Pokfulam Hong Kong Department of Neurosurgery Kwong Wah Hospital Hong Kong Division of Neurosurgery Department of Surgery Li Ka Shing Faculty of Medicine University of Hong Kong Queen Mary

Intracranial aneurysm, a localized dilation of arterial blood vessels in the Circle of Willis and its branches, is potentially life threatening, due to massive bleeding in the subarachnoid space upon rupture. In clinical practice, one minimally invasive surgical procedure is the implantation of a metallic stent to cover the aneurysm neck. This flow diverting device can reduce the flow into the aneurysm and enhance the prospect of thrombosis, a condition expected to reduce the risk of growth and rupture. The biomechanical and haemo-dynamic factors in stented and nonstented situations are studied by computational fluid dynamics. Unlike earlier models with straight or curved parent blood vessels, the aneurysm is now located near an arterial bifurcation. The influence of the aspect (depth to neck) ratio of the aneurysm on the flow dynamics will be emphasized, especially in the post-operation stages. More precisely, the maximum flow velocity, the variations of wall shear stress, the risk of stent migration and volumetric flow rate after endovascular treatment will be studied. Aneurysms with larger aspect ratios (i.e. smaller neck sizes for constant depth) generally pose a greater risk in terms of these flow parameters. These results will assist the applications and design of stents in future neurosurgical therapy. The approach is limited to a nonelastic model, without taking into account of questions like stent expansion and interaction with tissue.

关键词： Intracranial Aneurysm Endovascular Treatment Stent Aspect Ratio Computational Fluid Dynamics

The Hong Kong consensus recommendations on the diagnosis and management of pancreatic cystic lesions

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Hepatobiliary Surgery and Nutrition 2023年第5期12卷 715-735,I0019-I0020页

作者： Tan-To Cheung Yuk Tong Lee Raymond Shing-Yan tang Wong Hoi She Kai Chi Cheng Chin Cheung Cheung Keith Wan Hang Chiu Kenneth Siu Ho Chok Wing Sun Chow Tak Wing Lai Wai-Kay Seto Thomas Yau Department of Surgery Queen Mary HospitalThe University of Hong KongHong KongChina Gastroenterologist in private practice Hong KongChina Department of Medicine and Therapeutics The Chinese University of Hong KongHong KongChina Department of Surgery Kwong Wah HospitalHong KongChina Department of Surgery Tuen Mun HospitalHong KongChina Department of Radiology&Imaging Queen Elizabeth HospitalHong KongChina Department of Medicine The University of Hong KongHong KongChina Department of Surgery Princess Margaret HospitalHong KongChina Department of Medicine School of Clinical MedicineThe University of Hong KongHong KongChina State Key Laboratory of Liver Research The University of Hong KongHong KongChina

Background:The finding of pancreatic cystic lesions(PCL)on incidental imaging is becoming increasingly *** studies report a prevalence of 2.2-44.7%depending on the population,imaging modality and indication for imaging,and the prevalence increases with *** with PCL are at risk of developing pancreatic cancer,a disease with a poor *** publication summarizes recommendations for the diagnosis and management of PCL and post-operative pancreatic exocrine insufficiency(PEI)from a group of local ***:Clinical evidence was consolidated from narrative reviews and consensus statements formulated during two online meetings in March *** expert panel included gastroenterologists,hepatobiliary surgeons,oncologists,radiologists,and ***:Patients with PCL require careful investigation and follow-up due to the risk of malignant transformation of these *** should undergo clinical investigation and pancreas-specific imaging to classify lesions and understand the risk profile of the *** indicated,patients should undergo pancreatectomy to excise *** pancreatectomy,patients are at risk of PEI,leading to gastrointestinal dysfunction and ***,such patients should be monitored for symptoms of PEI,and promptly treated with pancreatic enzyme replacement therapy(PERT).Patients with poor response to PERT may require increases in dose,addition of a proton pump inhibitor,and/or further investigation,including tests for pancreatic *** are also at risk of new-onset diabetes mellitus after pancreatectomy;they should be screened and treated with insulin if ***:These statements are an accurate summary of our approach to the diagnosis and management of patients with PCL and will be of assistance to clinicians treating these patients in a similar clinical landscape.

关键词： Pancreatic cystic lesions pancreatic endocrine insufficiency pancreatic enzyme replacement therapy

Adult-onset immunodeficiency due to anti-interferon-gammaautoantibody in mainland Chinese

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Chinese Medical Journal 2014年第6期127卷 1189-1190页

作者： Chan Jasper Fuk-woo Yee Kwok-sang tang Bone Siu-fai Cheng Vincent Chi-chung Hung Ivan Fan-ngai Yuen Kwok-yung State Key Laboratory of Emerging Infectious Diseases Department of Microbiology the University of Hong Kong Hong Kong China Integrated Medical Services Kwong Wah Hospital Hong Kong China Department of Pathology Hong Kong Sanatorium and HospitalHong Kong China Department of Microbiology Queen Mary Hospital Hong KongChina Department of Medicine the University of Hong Kong Hong Kong China

Immunodeficiency due to anti-interferon-gamma(anti-IFN-γ)autoantibody is an emerging adult-onsetimmunodeficiency syndrome associated with severeor disseminated infections caused by non-tuberculous

关键词： autoantibody iterferon gamma mycobacterium Penicillium marneffei erythema nodosum

The effects of stent porosity on the endovascular treatment of intracranial aneurysms located near a bifurcation

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Journal of Biomedical Science and Engineering 2013年第8期6卷 812-822页

作者： Abraham Yik-Sau tang Hiu-Ning Chan Anderson Chun-On Tsang Gilberto Ka-Kit Leung Kar-Ming Leung Alfred Cheuk-Hang Yu Kwok-Wing Chow Department of Mechanical Engineering University of Hong Kong Hong Kong China Department of Neurosurgery Kwong Wah Hospital Hong Kong China Division of Neurosurgery Department of Surgery Li Ka Shing Faculty of Medicine University of Hong Kong Queen Mary Hos-pital Hong Kong China Medical Engineering Program Department of Electrical and Electronic Engineering University of Hong Kong Hong Kong China

Intracranial aneurysm occurs when a cerebral artery develops an abnormal sac-like dilatation, and will cause massive bleeding in the subarachnoid space upon rupture. Endovascular stenting is a minimally invasive procedure in which a flow-diverting stent is deployed to cover the aneurysm neck, thereby restricting blood from entering the aneurysm and reducing the risk of rupture. The stent porosity, a crucial factor determining the intra-aneurysmal hemodynamics following treatment, is investigated by computational fluid dynamics techniques. Based on the computational results, a low porosity stent will dramatically reduce the flow velocity and the flow rate inside the side branch vessel. Conversely, a high porosity stent may not provide adequate flow reduction inside the aneurysm, possibly causing treatment failure. An advisable range of optimal stent porosity would be 60% to 75%, which can drastically reduce the flow rate into the aneurysm while preserving enough blood flow for the side branch vessel. Clinically, deployment of two or more flow-diverting stents may not increase treatment efficacy but can potentially lead to adverse effects due to side-branch hypoperfusion. The present quantitative analysis can also provide practical insight for future stent design.

关键词： Intracranial aneurysm Endovascular Treatment Stent Stent Porosity Computational Fluid Dynamics

肺炎克雷伯菌所致外科血流感染的临床特点及细菌耐药性

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中国感染与化疗杂志 2017年第4期17卷 361-364页

作者：张小兵唐世龙卢强张万宇中山大学附属东华医院普外二科广东东莞523110

目的回顾性分析外科患者中肺炎克雷伯菌所致血流感染的临床特点及病原菌耐药性,为外科临床合理选用抗菌药物控制感染提供依据。方法参照卫生部医院感染诊断标准,回顾性分析中山大学附属东华医院2013年1月-2015年6月所有血培养所获肺炎... 详细信息

目的回顾性分析外科患者中肺炎克雷伯菌所致血流感染的临床特点及病原菌耐药性,为外科临床合理选用抗菌药物控制感染提供依据。方法参照卫生部医院感染诊断标准,回顾性分析中山大学附属东华医院2013年1月-2015年6月所有血培养所获肺炎克雷伯菌的外科患者病史。按常规方法进行细菌分离、鉴定,细菌药物敏感试验采用纸片扩散法,采用WHONET 5.6软件进行分析。结果由肺炎克雷伯菌所致的医院获得性血流感染的外科患者共78例,原发性血流感染占12.8%(10/78),继发性血流感染占87.2%(68/78),主要与手术及侵袭性操作等因素相关。药敏结果显示肺炎克雷伯菌对头孢曲松、头孢呋辛和哌拉西林的耐药率接近40%。产ESBL肺炎克雷伯菌(占43.6%)对各抗菌药物的耐药率明显高于非产ESBL株。哌拉西林-他唑巴坦、阿米卡星、亚胺培南和美罗培南对该菌仍有较好的抗菌活性,但出现了耐亚胺培南株。结论外科患者中肺炎克雷伯菌血流感染以继发性感染多见,应加强医院感染控制;同时,积极送检微生物标本进行培养和药敏测定,依据药敏结果,合理选用抗生素。

关键词：血流感染肺炎克雷伯菌耐药性

北京2008武术比赛对武术竞赛市场影响的探究

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河北体育学院学报 2009年第6期23卷 87-90页

作者：汤立许上海体育学院武术学院上海200438 广州体育学院武术系广东广州510050

运用文献资料法、调查法和专家访谈法,对北京2008武术比赛进行解析,从扩大比赛影响、提升组织能力、推动竞赛多元发展、提升竞赛科技水平、促进国际传播以及资金、人才、礼仪等方面探索了北京2008武术比赛对武术竞赛市场的影响。

关键词：北京2008武术比赛武术竞赛市场影响

吡格列酮与醋酸环丙孕酮对多囊卵巢综合征患者内分泌及代谢的影响

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哈尔滨医药 2018年第3期38卷 230-231页

作者：钟远萍汤耀光钟绍涛东莞市石碣医院广东东莞523290 东莞东华医院广东东莞523120 广州红十字会医院广东广州510240

目的分析吡格列酮与醋酸环丙孕酮对多囊卵巢综合征(PCOS)患者内分泌及其代谢的影响。方法将于我院2016年2月至2017年3月收治的92例多囊卵巢综合征患者作为研究对象,随机分组为观察组和对照组各46例。对照组给予醋酸环丙孕酮治疗,观察组... 详细信息

目的分析吡格列酮与醋酸环丙孕酮对多囊卵巢综合征(PCOS)患者内分泌及其代谢的影响。方法将于我院2016年2月至2017年3月收治的92例多囊卵巢综合征患者作为研究对象,随机分组为观察组和对照组各46例。对照组给予醋酸环丙孕酮治疗,观察组在醋酸环丙孕酮治疗的基础上采用吡格列酮治疗;观察两组患者的血清黄体生成素(LH)、卵泡刺激素(FSH)、睾酮(T)、患者空腹血糖(FBG),空腹胰岛素(FIN)水平。结果在内分泌方面,观察组患者LH水平、FSH水平、T水平分别为(5.72±1.84)U/L、(0.57±0.21)U/L、(7.12±1.25)mmol/L明显低于对照组的(8.43±1.20)U/L、(1.34±0.86)U/L、(10.80±1.14)mmol/L。在代谢方面,观察组的FBG水平、FIN水平分别为(2.71±1.85)mmol/L、(16.68±2.31)m IU/L明显低于对照组的(4.26±2.10)mmol/L,(21.97±3.25)m IU/L。差异均具有统计学意义(P<0.05)。观察组治疗有效率明显优于对照组,差异具有统计学意义,(P<0.05)。结论吡格列酮与醋酸环丙孕酮联合可显著改善PCOS患者内分泌及代谢功能,值得临床应用。

关键词：吡格列酮醋酸环丙孕酮多囊卵巢综合征内分泌

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预置滑线结对拔管后伤口愈合的影响

中国临床新医学 2020年第4期13卷 391-394页

作者：张万宇陈骏星唐世龙中山大学附属东华医院普外二科广东523110

目的探讨预置滑线结对拔除引流管后伤口愈合的影响。方法回顾性分析该院2019-01~2019-11间术中置入引流管的各类手术78例,术中在引流管口预先缝合置入可滑动线结,术后拔除引流管推动滑线结闭合伤口,拔管后5~7 d拆除该线结,评价伤口愈合... 详细信息

目的探讨预置滑线结对拔除引流管后伤口愈合的影响。方法回顾性分析该院2019-01~2019-11间术中置入引流管的各类手术78例,术中在引流管口预先缝合置入可滑动线结,术后拔除引流管推动滑线结闭合伤口,拔管后5~7 d拆除该线结,评价伤口愈合情况。结果78例中甲级愈合72例,愈合率为92.3%;乙级愈合3例,愈合率为3.8%;丙级愈合1例,愈合率为1.3%;2例急性阑尾炎因拔管后滑线结无法滑动对合。65例术后随访3~10个月,随访率为85.5%,64例创缘整齐、无感染者,愈合后伤口呈线状瘢痕,伤口不适感较轻微;1例瘢痕过度增生,考虑为体质原因。结论术中预先缝合放置可滑动线结能够促进拔管后伤口甲级愈合,是一种较为实用的技巧,值得推广。

关键词：引流管伤口缝合线结