检索结果-南通市图书馆

Fluid-Structure Interaction in Problems of Patient Specific Transcatheter Aortic Valve Implantation with and Without Paravalvular Leakage Complication

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

Fluid Dynamics & Materials Processing 2021年第3期17卷 531-553页

作者： adi Azriff Basri Mohammad Zuber Ernnie Illyani Basri Muhammad Shukri Zakaria Ahmad Fazli Abd Aziz Masaaki Tamagawa Kamarul Arifin Ahmad Department of Aerospace Engineering Universiti Putra MalaysiaSerdang43400Malaysia Department of Aeronautical and Automobile Engineering Manipal Institute of TechnologyManipal Academy of Higher EducationManipal576104India Department of Medicine Universiti Putra MalaysiaSerdang43400Malaysia Department of Biological Function and Engineering Kyushu Institute of TechnologyKitakyushuJapan Fakulti Kejuruteraan Mekanikal Universiti Teknikal Malaysia MelakaHang Tuah Jaya76100Malaysia Aerospace Malaysia Research Center Universiti Putra MalaysiaSerdang43400Malaysia

Paravalvular Leakage(PVL)has been recognized as one of the most dangerous complications in relation to Transcathether Aortic Valve Implantation(TAVI)***,data available in the literature about Fluid Structure Interaction(FSI)for this specific problem are relatively *** the present study,the fluid and structure responses of the hemodynamics along the patient aorta model and the aortic wall deformation are studied with the aid of numerical simulation taking into account PVL and 100%TAVI valve *** particular,the aorta without valve(AWoV)is assumed as the normal condition,whereas an aorta with TAVI 26 mm for 100%Geometrical Orifice Area(GOA)is considered as the patient aorta with PVL complication.A 3D patient-specific aorta model is elaborated using the MIMICS *** of the identical TAVI valve of Edward SAPIEN XT 26(Edwards Lifes ciences,Irvine,California)is *** undersized 26 mm TAVI valve with 100%valve opening is selected to mimic the presence of PVL at the aortic *** present research indicates that the existence of PVL can increase the blood velocity,pressure drop and WSS in comparison to normal conditions,thereby paving the way to the development of recirculation flow,thrombus formation,aorta wall collapse,aortic rupture and damage of endothelium.

关键词： Paravalvular Leakage(PVL) hemodynamics transcatheter aortic valve implantation(TAVI) fluid-structure interaction(FSI) edward sapien valve aortic valve(ESV) aortic stenosis(AS)

Digitalized Mirror Array and Its Application in Large Telescope:Principle and Case Studies

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2009年第10期52卷 750-760页

作者： CHEN Ying-Tian ZHANG Yang HU Sen Ho Tso-Hsiu Boon ham Lim Chen Sin Lim Kok Keong Chong Boon Kok Tan University of Science and Technology of China Department of Astronomy and Applied Physics Hefei 230026 China University of Science and Technology of China Department of Mathematics Hefei 230026 China Institute of Theoretical Physics Chinese Academy of Sciences Beijing 100190 China University of Tunku Abdul Rahman Faculty of Engineering and Science Selangor Malaysia

In this article, we report the principle and conceptual design of a fundamentally different technology in fabricating high precision aberration free optical devices. The tip-tilt of facet in a mirror array is produced by digitally controlled line-tilts of rows and columns. It has not only provided a cost-effective designing methodology in optical physics but also led to a much finer precision of 1 mili arc sec or less. As examples of the application of the proposed digitalised optics, two case studies have been given： a 10 m Schmidt telescope （off-axis） and an 8 m Cassegrain telescope （on-axis）.

关键词： tip-tilting line-tilting Schmidt telescope aberration correction cassegrain telescope

PID-Type Fuzzy Controller for Grid-Supporting Inverter of Battery in Embedded Small Variable Speed Wind Turbine

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

Journal of Power and Energy Engineering 2014年第4期2卷 151-160页

作者： Ferdian Ronilaya Hajime Miyauchi adi Kurniawan Department of Frontier Technology for Energy and Devices Kumamoto University Kumamoto-shi Japan Department of Electrical Power Engineering The State Polytechnic of Malang Malang Indonesia Institut Teknologi Sepuluh Nopember Surabaya Indonesia

Frequency and voltage of embedded variable speed wind turbine (VSWT) driving a permanent magnet synchronous generator (PMSG) is strongly affected by wind speed fluctuations. In practice, power imbalance between supply and demand is also common, especially when VSWT-PMSG is connected to a weak micro grid (MG). If load demand fluctuations become high, isolated MG may be unable to stabilize the frequency and voltage so that battery storage needs to be installed into the MG to adjust energy supply and demand. To allow flexible control of active and reactive power flow from/to battery storage, grid-supporting inverters are used. For a system that contains highly nonlinear components, the use of conventional linear proportional-integral-derivative (PID) controllers may cause system performance deterioration. Additionally, these controllers show slow, oscillating responses, and complex equations are required to obtain optimum responses in other controllers. To cope with these limitations, this paper proposes PID-type fuzzy controller (PIDfc) design to control grid-supporting inverter of battery. To ensure safe battery operating limits, we also propose a new controller scheme called intelligent battery protection (IBP). This IBP is integrated into PIDfc. Several simulation tests are performed to verify the scheme’s effectiveness. The results show that the proposed PIDfc controller exhibits improved performance and acceptable responses, and can be used instead of conventional controllers.

关键词： Battery PID-Type Fuzzy Controller Inverter Permanent Magnet Synchronous Generator (PMSG) Variable Speed Wind Turbine (VSWT)

炔烃与硫代羟吲哚的化学选择性S-芳基化反应研究

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

炔烃与硫代羟吲哚的化学选择性S-芳基化反应研究

作者： adi Saputra 北京化工大学

学位级别：硕士

我们实现了苯炔和二氢吲哚-2-硫酮间的选择性S-芳基化反应。活性较高的Kobayashi苯炔前体成功得与硫胺化合物完成了选择性的S-芳基化反应,产率可达94%。该反应可以高效得合成2-（芳硫基）假吲哚,一种硫代酰亚胺类化合物。并且,本反应中... 详细信息

我们实现了苯炔和二氢吲哚-2-硫酮间的选择性S-芳基化反应。活性较高的Kobayashi苯炔前体成功得与硫胺化合物完成了选择性的S-芳基化反应,产率可达94%。该反应可以高效得合成2-（芳硫基）假吲哚,一种硫代酰亚胺类化合物。并且,本反应中的二氢吲哚-2-硫酮也可以与其他结构的苯炔前体,如Hoye苯炔前体和羧基重氮基苯,在无碱条件下发生反应。针对携带不同官能团分子的竞争反应实验,大量反应实验以及对最终产物的衍生化实验都表明本方法具有潜在的合成应用性。最后,值得一提的是,本反应的最终产物可以在还原性环境中稳定存在。

关键词：苯炔二氢吲哚-2-硫酮 S-芳基化反应化学选择性硫代酰亚胺

adi公司发布应用于高级多媒体3G TD-SCDMA蜂窝手机的新一代芯片组

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

电子技术应用 2007年第2期33卷 6-7页

作者： adi公司 adi公司

——SoftFone—LCR＋芯片组扩展了adi公司3GTD—SCDMA技术解决方案的种类，为用户提供从基本语音手机到高端TD—SCDMA多媒体手机的多种选择。

关键词：多媒体手机 adi公司芯片组 SCDMA 蜂窝应用技术解决方案

Prostate-specific antigen density predicts favorable pathology and biochemical recurrence in patients with intermediate-risk prostate cancer

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

Asian Journal of Andrology 2016年第3期18卷 480-484,I0012页

作者： Ho Won Kang Hae Do Jung Joo Yong Lee Jong Kyou Kwon Seong Uk Jeh Kang Su Cho Won Sik ham Young Deuk Choi Department of Urology Chungbuk National University College of Medicine Cheongju Korea Department of Urology Severance Hospital Urological Science InstituteYonsei University College of Medicine Seoul Korea Department of Urology. Inje university Haeundae Paik Hospital Busan Korea Department of Urology Gyeongsang National University School of Medicine Jinju Korea Department of Urology Gangnam Severance Hospital Urological Science Institute Yonsei University Uollege of Medicine Seoul Korea Robot and Minimal Invasive Surgery Center Severance Hospital Yonsei University College of Medicine Seoul Korea.

This study was designed to identify clinical predictors of favorable pathology and biochemical recurrence （BCR） in patients with intermediate-risk prostate cancer （IRPCa）. Between 2006 and 2012, clinicopathological and oncological data from 203 consecutive men undergoing robot-assisted radical prostatectomy （RARP） for IRPCa were reviewed in a single-institutional retrospective study. Favorable pathology was defined as Gleason score 〈6 and organ-confined cancer as detected by surgical pathology. Logistic regression analysis was used to determine predictive variables of favorable pathology, and the Kaplan-Meier and multivariate Cox regression model were used to estimate BCR-free survival after RARP. Overall, 38 patients （18.7%） had favorable pathology after RARP. Lower quartile prostate-specific antigen density （PSAD） was associated with favorable pathology compared to the highest quartile PSAD after adjusting for preoperative PSA, clinical stage and biopsy Gleason score （odds ratio, 5.42; 95% confidence interval, 1.01-28.97; P = 0.048）. During a median 37.8 （interquartile range, 24.6-60.2） months of follow-up, 66 patients experienced BCR. There were significant differences with regard to BCR free survival by PSAD quartiles （log rank, P = 0.003）. Using a multivariable Cox proportion hazard model, PSAD was found to be an independent predictor of BCR in patients with IRPCa after RARP （hazard ratio, 4.641; 95% confidence interval, 1.109-19.417; P = 0.036）. The incorporation of the PSAD into risk assessments might provide additional prognostic information and identify some patients in whom active surveillance would be appropriate in patients with IRPCa.

关键词： biochemical recurrence prostatectomy prostate-specific antigen prostate-specific antigen density prostatic neoplasms

Correction-free remotely scanned two-photon in vivo mouse retinal imaging

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Light(Science & Applications) 2016年第1期5卷 882-890页

作者： adi Schejter Bar-Noam Nairouz Farah Shy Shoham Faculty of Biomedical Engineering Technion–Israel Institute of TechnologyKiryat HaTechnionHaifa 32000Israel

Non-invasive fluorescence retinal imaging in small animals is an important requirement for an array of translational vision *** in vivo two-photon imaging of the mouse retina may enable the long-term investigation of the structure and function of healthy and diseased retinal ***,to date,this has only been possible using relatively complex adaptive-optics ***,the optical modeling of the murine eye and of the imaging system is used to achieve correction-free two-photon microscopy through the pupil of a mouse eye to yield high-quality,optically sectioned fundus *** remotely scanning the focus using an electronically tunable lens,high-resolution three-dimensional fluorescein angiograms and cellular-scale images are acquired,thus introducing a correction-free baseline performance level for two-photon in vivo retinal ***,the system enables functional calcium imaging of repeated retinal responses to light stimulation using the genetically encoded indicator,*** results and the simplicity of the new add-on optics are an important step toward several structural,functional,and multimodal imaging applications that will benefit from the tight optical sectioning and the use of near-infrared light.

关键词： angiography eye model functional calcium imaging in vivo optogenetics two-photon microscopy

Shale Hydrocarbon Development Based on Drill Cuttings &TOC Analysis: Case Study of Brownshale Drill Cuttings of Well BS-03, Pematang Formation, Bengkalis Trough, Central Sumatra Basin

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journal of Yangtze Oil and Gas 2020年第3期5卷 87-102页

作者： Aris Buntoro Carolus Prasetyadi Ricky adi Wibowo Suranto Petroleum Engineering Department UPN “Veteran” Yogyakarta Indonesia India Geological Engineering Department UPN “Veteran” Yogyakarta Indonesia India Upstream Technical Center PT. Pertamina (Persero) Indonesia India

Brownshale is a lithology unit in the middle of the Pematang Formation consisting of brown to black shale that is deposited in the lacustrine environment. Brownshale from the results of previous studies stated as the main source rock in the Central Sumatra Basin, which is spread over several troughs, namely Balam, Aman, Rangau, Kiri, and Bengkalis Troughs, where Bengkalis Trough is the most extensive Trough. In the shale hydrocarbon prospecting analysis, Brownshale from previous researchers concluded that it had good prospects, based on several parameters including: TOC values with poor to very good quality. Brownshale formation is a type of kerogene as kerogen type of II/III, brittleness index greater than 0.48, and rock compressive strength below 10,000 Psi. One method in the development phase of shale hydrocarbon is to determine the fracable sweetspot window using drill cuttings and TOC, because there is no core data available. Based on the results of the well log analysis of well BS-03, it is obtained information that the Brownshale formation has a thickness of 1028 feet with intercalation laminated shale/sand section, so the mineral content varies greatly. From the ternary diagram of XRD (bulk analysis) results of drill cuttings of Brownshale formation of well BS-03, it can be seen that mineral distribution of Quartz-Clay-Calcite (Q-C-C) is spread between zone 1 to zone 3, namely: Dominant Quartz - Minor Clay & Carbonate (Zone 1: Brittle Quartz Rich), Dominant Carbonate - Quartz & Minor Clay (Zone 2: Brittle Carbonate Rich), and Quartz & Carbonate Balance - Clay minor (Zone 3: Ductile, hard to frac). This shows that not all Brownshale formation intervals are easy to frac (high fracability). From the XRD result, percentage of mineral content (bulk analysis) of Brownshale drill cuttings, there is an interesting phenomenon, i.e. the presence of sillimanite and kaliophilite minerals significantly starting at a depth of 10,780 ft and below, where both minera

关键词： Shale Hydrocarbon Mineralogy (XRD) Analysis TOC Analysis Fracability Model

Coverage Radius-based Power Control of Femtocells in Ultra-Dense Networks(UDN)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Coverage Radius-based Power Control of Femtocells in Ultra-D...

作者：科赛姆（KESSEM Bawimatom P'ham）北京邮电大学

学位级别：硕士

Rapid increase in mobile data has raised the stakes on developing innovative new technologies and cellular topologies that can meet these demands in an energy efficient *** of the most interesting trends that will emerge from this cellular evolution is Ultra-dense network where small cells such as femtocells will be highly densely *** are small,inexpensive,low power base stations that are generally consumer deployed,and are expected to significantly improve the coverage and capacity of the indoor users or in some hotspot *** access point(FAPs)have extensive auto configuration and perform self-optimization function that continually adjusts the transmit power so the femtocell coverage does not leak into an outdoor area while sufficiently covering the indoor femtocell *** this paper a coverage radius-based downlink power control scheme to mitigate interference in densely deployed FAPs is *** on varying coverage radii,a max/min function is used to adjust the downlink transmit power value of a ***-level simulations are performed and results demonstrate that the proposed algorithm achieves significant performance and satisfaction gains.

关键词： Ultra-dense network femtocell power control