检索结果-南通市图书馆

Portal hypertension in polycystic liver disease patients does not affect wait-list or immediate post-liver transplantation outcomes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

world Journal of Gastroenterology 2016年第45期22卷 9966-9973页

作者： Neil Rajoriya Dhiraj Tripathi Joanna A Leithead Bridget K Gunson Sophie Lord james w Ferguson Gideon M Hirschfield Liver Unit Queen Elizabeth Hospital Centre for Liver Research NIHR Birmingham Liver Biomedical Research Unit University of Birmingham

AIM To establish the impact of portal hypertension(PH) on wait-list/post-transplant outcomes in patients with polycystic liver disease(PCLD) listed for liver transplantation. METHODS A retrospective single-centre case controlled study of consecutive patients listed for liver transplantation over 12 years was performed from our centre. PH in the PCLD cohort was defined by the one or more of following parameters:(1) presence of radiological or endoscopic documented varices from our own centre or the referral centre;(2) splenomegaly(> 11 cm) on radiology inabsence of splenic cysts accounting for increased imaging size;(3) thrombocytopenia(platelets without radiological evidence of hepatic venous outflow obstruction from a single cyst. RESULTS Forty-seven PCLD patients(F: M = 42: 5) were listed for liver transplantation(LT)(single organ, n = 35; combined liver-kidney transplantation, n = 12) with 19 patients(40.4%) having PH. when comparing the PH group with non-PH group, the mean listing age(PH group, 50.6(6.4); non-PH group, 47.1(7.4) years; P = 0.101), median listing MELD(PH group, 12; non-PH group, 11; P = 0.422) median listing UKELD score(PH group, 48; non-PH group, 46; P = 0.344) and need for renal replacement therapy(P = 0.317) were similar. In the patients who underwent LT alone, there was no difference in the duration of ICU stay(PH, 3 d; non-PH, 2 d; P = 0.188), hospital stay length(PH, 9 d; non-PH, 10 d; P = 0.973), or frequency of renal replacement therapy(PH, 2/8; non-PH, 1/14; P = 0.121) in the immediate post-transplantation period. CONCLUSION Clinically apparent portal hypertension in patients with PCLD listed for liver transplantation does not appear to have a major impact on wait-list or peri-transplant morbidity.

关键词： Polycystic liver disease Portal hypertension Liver transplantation

Effect of Hind Leg Morphology on Performance of a Canine-inspired Quadrupedal Robot

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Bionic Engineering 2015年第3期12卷 339-351页

作者： james Andrew Smith Jamil Jivraj Ryerson University 350 Victoria St. Toronto ON Canada

Biomimetic leg designs often appear to be arbitrarily chosen. To make a more objective choice regarding biomimetic leg configuration for small canine-inspired robots, we compare one hind leg to the same leg arranged in a different orientation, and show that the less biomimetic leg provides better performance. This differently-oriented leg design, which we call ＂transverse-mirrored＂ was more efficient and faster, both in simulation and experiment even though both leg configurations used the same passive and active components, rest angles, and monoartieular knee spring. In experiments the normal configuration had a maximum speed of 0.33 m·s^-1 and a specific resistance of 5.1. Conversely, the less biomimetic transverse-mirrored configuration had a maximum speed of 0.4 m·s^-1 and specific resistance of 3.9. Therefore the transverse-mirrored leg＇s best performance yields a 21% increase in speed and 24% decrease in specific resistance when compared to the best performance achieved in the normal biomimetic leg. The major underlying reason is that the knee spring engages more readily in the transverse-mirrored configuration, resulting in this faster and more efficient locomotion. The conclusion is that simply copying from nature does not lead to optimal performance and that insight into the role played by passive design components on natural locomotory dynamics is important.

关键词： biomimetic legged robot quadruped leg design walking legged locomotion

LSTM Network-Based Adaptation Approach for Dynamic Integration in Intelligent End-Edge-Cloud Systems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Tsinghua Science and Technology 2024年第4期29卷 1219-1231页

作者： Xuan Yang james A.Esquivel Graduate School Angeles University FoundationAngeles City 2009Philippinesand also with Shandong Provincial University Laboratory for Protected HorticultureWeifang University of Science and TechnologyWeifang 262700China Graduate School Angeles University FoundationAngeles City 2009Philippines

Edge computing, which migrates compute-intensive tasks to run on the storage resources of edge devices, efficiently reduces data transmission loss and protects data privacy. However, due to limited computing resources and storage capacity, edge devices fail to support real-time streaming data query and processing. To address this challenge, first, we propose a Long Short-Term Memory (LSTM) network-based adaptive approach in the intelligent end-edge-cloud system. Specifically, we maximize the Quality of Experience (QoE) of users by automatically adapting their resource requirements to the storage capacity of edge devices through an event mechanism. Second, to reduce the uncertainty and non-complete adaption of the edge device towards the user’s requirements, we use the LSTM network to analyze the storage capacity of the edge device in real time. Finally, the storage features of the edge devices are aggregated to the cloud to re-evaluate the comprehensive capability of the edge devices and ensure the fast response of the user devices during the dynamic adaptation matching process. A series of experimental results show that the proposed approach has superior performance compared with traditional centralized and matrix decomposition based approaches.

关键词： quality of experience data query end-edge-cloud Long Short-Term Memory(LSTM)networks

Intraductal papillary mucinous neoplasms and other pancreatic cystic lesions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

world Journal of Gastroenterology 2008年第19期14卷 2977-2979页

作者： Hugh james Freeman Department of Medicine (Gastroen-terology) University of British Columbia

Pancreatic cystic neoplasms are being increasingly recognized, even in the absence of symptoms, in large part, due to markedly improved imaging modalities such as magnetic resonance imaging (MRI)/magnetic resonance cholangio pancreatography (MRCP) and computer tomography (CT) scanning. During the past 2 decades, better imaging of these cystic lesions has resulted in definition of different types, including pancreatic intraductal papillary mucinous neoplasms (IPMN). while IPMN represent only a distinct minority of all pancreatic cancers, they appear to be a relatively frequent neoplastic form of pancreatic cystic neoplasm. Moreover, IPMN have a much better outcome and prognosis compared to pancreatic ductal adenocarcinomas. Therefore, recognition of this entity is exceedingly important for the clinician involved in diagnosis and further evaluation of a potentially curable form of pancreatic cancer.

关键词： Pancreatic cancer Pancreatic intraductal papillary mucinous neoplasms Mucinous cystic neoplasm of pancreas Serous cystadenoma Pancreatic cysticlesions

Effects of anthropogenic disturbances on natural regeneration and population structure of gum arabic tree (Acacia senegal)in the woodlands of Lake Baringo ecosystem, Kenya

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Forestry Research 2017年第4期28卷 775-785页

作者： Stephen F. Omondi David w. Odee George O. Ongamo james I. Kanya Damase P. Khasa Kenya Forestry Research Institute P.O. Box 2041200200 NairobiKenya School of Biological Sciences University of NairobiP. O. Box 30197-00100NairobiKenya Centre for Forest Research and Institute for Systems andIntegrative Biology Universite′ LavalSainte-FoyQC G1V 0A6Canada

Despite the ecological and economic importance of Acacia senegal, little is known about the effects of anthropogenic disturbances on its natural regeneration patterns and population structure. we investigated the effects of these factors within the Lake Baringo woodland ecosystem. Data was collected from 60 plots of 20 m × 20 m systematically distributed in four A. senegal-dominated populations within the Lake Baringo woodland. Sample populations spanned a degradation gradient measured by a population disturbance index (PDI). Trees were measured for diameter at breast height (DBH) and categorized by growth stages: seedling, sapling and adult tree. Higher seedling and sapling densities were recorded in lightly than heavily disturbed populations, but only sapling density was significantly different between the two disturbance levels (P = 0.02). Lightly disturbed populations revealed a reversed J-shape size-class distribution (SCD) indicative of stable structure unlike the heavily disturbed populations. The quotient and permutation indices indicated unstable populations with episodic recruitment and mortality. Our study reveals that natural regeneration and population structure of A. senegal were affected majorly by selective harvesting and heavy browsing. Suitable management strategies to control livestock grazing and illegal tree harvesting within the woodland is required to promote conservation of the species genetic resources

关键词： Anthropogenic disturbance Population dynamics Renewal rate Selective harvesting Tropical woodland

Unitless Physics II: Internal Proton Structure US9-2

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 Modern Physics 2017年第9期8卷 1633-1649页

作者： james w. Christy 7285 Golden Eagle Drive Flagstaff AZ USA

The internal structure of the proton is chaotic according to the Standard Model. This paper explores several possibilities, based on US9-1, for producing an internal structure of the proton which is orderly. The hypothesis that quantized distance determination via particle to particle communication is required for force application eliminates E & M in the proton interior enabling a structure consisting of gravitational orbits. Communication velocities much greater than the velocity of light are required to enable the fundamental particles to generate the accepted laws of physics. In order to generate increasing complexity in Nature, the Uncertainty Principle must become the Organizational Principle. The Hydrogen atom is the source of evolution.

关键词： Unitless Physics Fundamental Particle Communication

Reproductive changes associated with celiac disease

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

world Journal of Gastroenterology 2010年第46期16卷 5810-5814页

作者： Hugh james Freeman Department of Medicine (Gastroenterology) University of British Columbia Hospital

Celiac disease is a mucosal disorder of the small intestine that may be triggered by dietary exposure to gluten in genetically-susceptible *** disorder is often associated with diarrhea,malabsorption and weight loss along with other extra-intestinal *** changes have been described,including impaired fertility and adverse pregnancy outcomes possibly related to immune-mediated mechanisms or nutrient *** possible pathogenetic factors that may alter placental function include maternal celiac disease autoantibodies binding to placental transglutaminase,and genetic mutations that may facilitate microthrombus *** noting activation during pregnancy or the puerperium may be important,and suggest that celiac disease may also be hypothetically precipitated by maternal exposure to one or more fetal antigens.

关键词： Celiac disease Infertility Pregnancy Post-partum celiac disease Fetal outcome

Unitless Physics I: Relating the Fundamental Constants

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Astronomy and Astrophysics 2015年第3期5卷 182-192页

作者： james w. Christy 7285 Golden Eagle Drive Flagstaff Arizona USA

The fundamental constants of Physics can be related via a numerical equivalence. This equivalence leads to a unitless transformation which reduces the number of fundamental constants and provides a simple relationship between E&M, gravitation and quantum mechanics. Unitless relationships in this paper are considered a representation associated with information processing internal to fundamental particles. The application of the unitless transformation (US9) to fundamental particle masses and lifetimes clearly demonstrates the applicability of this method to high energy physics.

关键词： Unitless Physics Gravitation E&M Quantum Mechanics Fundamental Particles

Analysis of the Oscillatory Flows of Multiple Shock waves in a Constant Area Duct

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Thermal Science 2024年第3期33卷 794-806页

作者： K james Jintu KIM Heuy Dong Department of Mechanical Engineering Andong National UniversityAndong36729Republic of Korea CAD-IT Korea Co. Ltd.Seoul08591Republic of Korea

The oscillatory response of multiple shock waves to downstream perturbations in a supersonic flow is studied numerically in a rectangular *** shock waves are formed inside the duct at a shock Mach number of *** duct has an exit height of H,and the effect of duct resonance on multiple shock oscillations is investigated by attaching exit ducts of lengths 0H,50H,and *** downstream disturbance frequency varied from 10 Hz to 200 Hz to explore the oscillation characteristics of the multiple shock *** oscillatory response of shock waves under self-excited and forced oscillation conditions are analyzed in terms of wall static pressure,shock train leading-edge location,shock train length,and the size of the separation *** extent of the initial shock location increases with an increase in exit duct length for the self-excited oscillation *** analysis of the shock train leading edge and the spectral analysis of wall static pressure variations are *** variation in the shock train length is analyzed using the pressure ratio method for self-excited as well as forced *** RMS amplitude of the normalized shock train length(ζ_(ST))increases with an increase in the exit duct length for the self-excited oscillation *** the downstream perturbation frequency is increased,ζ_(ST)is decreased for exit duct *** all exit duct designs and downstream forcing frequencies,the size of the separation bubble grows and shrinks during the shock oscillations,demonstrating the dependence on duct resonance and forced oscillations.

关键词： shock train downstream disturbance supersonic flow shock wave boundary layer interaction duct resonance flow separation