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Numerical Analysis of Tilted Cutting and F128 Brushes

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Computer Modeling in engineering & Sciences 2019年第10期121卷 23-47页

作者： Libardo v.vanegas-Useche Magd M.Abdel-Wahab Graham A.Parker Facultad de Ingeniería Mecánica Universidad Tecnológica de PereiraLa JulitaPereira 660003Colombia Division of Computational Mechanics Ton Duc Thang UniversityHo Chi Minh CityViet Nam Faculty of Civil engineering Ton Duc Thang UniversityHo Chi Minh CityViet Nam Soete Laboratory Faculty of Engineering and ArchitectureGhent UniversityTechnologiepark Zwijnaarde 46B-9052 ZwijnaardeBelgium Faculty of engineering and Physical Sciences University of Surrey.Guildford GU27XHUK.

Road sweeping is an essential service that has to be conducted for public health,as well as aesthetic *** many countries,sweeping vehicles are used for this *** usually comprise a gutter brush that sweeps the debris that is located in the road *** work studies the performance of two kinds of gutter brushes:a cutting brush and a flicking(F128)*** is carried out by means of a 3-D dynamic,nonlinear Finite element(Fe)brush model developed by the *** this model,inertia forces are applied to the bristle,and its clamped end is ***,the surface(road)is rotated,translated,and ***-road interaction is modelled as flexible-to-rigid *** particular,the aim of this article is to compare the performance of a conventional brush and a brush rotating at variable *** brushes normally work tilted,Fe analyses are carried out for tilted cutting and F128 brushes,rotating at speeds that fluctuate at different *** is concluded that brush oscillations have a significant effect on bristle tip velocities and bristle-road ***,at certain frequencies,oscillations seem to improve sweeping performance of the F128 ***,they do not appear to improve significantly the performance of the cutting brush.

关键词： Gutter brushes cutting brush flicking brush FeM variable speed brushing

Formation of Co-implanted Silicon Ultra-Shallow Junctions for Low Thermal Budget Applications

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Chinese Physics Letters 2013年第1期30卷 127-129页

作者： Rehana Mustafa S.Ahmed e.U.Khan Department of Physics International Islamic UniversityIslamabadPakistan Advanced electronics Laboratory Faculty of Engineering&TechnologyInternational Islamic University IslamabadPakistan Center for emerging Sciences Engineering and TechnologyIslamabadPakistan Department of Physics Gomal UniversityD.I.KhanPakistan

We present a systematic study to create ultra-shallow junctions in n-type silicon substrates and investigate both pre-and post-annealing processes to create a processing strategy for potential applications in *** wafers were co-implanted with indium and C atoms at energies of 70 kev and 10 kev,respectively.A carefully chosen implantation schedule provides an abrupt ultra-shallow junction between 17 and 43 nm with suppressed sheet resistance and appropriate retained sheet carrier concentration at low thermal budget.A defect doping matrix,primarily the behavior and movement of co-implant generated interstitials at different annealing temperatures,may be engineered to form sufficiently activated ultra-shallow devices.

关键词： shallow annealing implantation

Study of vertically ascending flight of a hawkmoth model

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Acta Mechanica Sinica 2020年第5期36卷 1031-1045,I0002页

作者： Anh Tuan Nguyen vu Dan Thanh Le The Hung Tran v.N.Due van Binh Phung Faculty of Aerospace engineering Le Quy Don Technical UniversityHanoiVietnam Institute of Theoretical and Applied Research.Duy Tan University HanoiVietnam Division of Construction Computation Institute for Computational ScienceTon Due Thang UniversityHo Chi Minh CityVietnam Faculty of Civil engineering Ton Due Thang UniversityHo Chi Minh CityVietnam

This paper provides insight into the wing kinematics,the power requirement and the dynamic stability characteristics of a hawkmoth model in vertically ascending *** wing kinematics of the hawkmoth model is obtained based on the minimum required power *** optimization process is conducted using genetic and simplex algorithms that are coupled with an artificial neural network to rapidly predict the aerodynamic force and required *** training data for the neural network are generated from an unsteady vortex-lattice *** to hover,the results in this study show the larger flapping frequency and the smaller rotation amplitude of the hawkmoth wing kinematics in ascending ***,more power is required when the ascending speed *** conducting a dynamic modal analysis based on a cycle-average approach,the certain effect of the ascending speed on the modal structures of the hawkmoth model was observed.

关键词： Hawkmoth Ascending flapping flight-Genetic algorithm Artificial neural network Flight dynamic stability

Less common etiologies of exocrine pancreatic insufficiency

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World Journal of Gastroenterology 2017年第39期23卷 7059-7076页

作者： vikesh K Singh Mark e Haupt David e Geller Jerry A Hall Pedro M Quintana Diez Division of Gastroenterology Johns Hopkins University School of MedicineBaltimoreMD 21287United States Medical Affairs AbbVie Inc.North ChicagoIL 60064United States Cystic Fibrosis Clinical Development AbbVie Inc.North ChicagoIL 60064United States CReON^(█) Clinical Development AbbVie Inc.North ChicagoIL 60064United States CReON^(█) Development AbbVie Inc.North ChicagoIL 60064United States

exocrine pancreatic insufficiency(ePI), an important cause of maldigestion and malabsorption, results from primary pancreatic diseases or secondarily impaired exocrine pancreatic function. Besides cystic fibrosis and chronic pancreatitis, the most common etiologies of ePI, other causes of ePI include unresectable pancreatic cancer, metabolic diseases(diabetes); impaired hormonal stimulation of exocrine pancreatic secretion by cholecystokinin(CCK); celiac or inflammatory bowel disease(IBD) due to loss of intestinal brush border proteins; and gastrointestinal surgery(asynchrony between motor and secretory functions, impaired enteropancreatic feedback, and inadequate mixing of pancreatic secretions with food). This paper reviews such conditions that have less straightforward associations with ePI and examines the role of pancreatic enzyme replacement therapy(PeRT). Relevant literature was identified by database searches. Most patients with inoperable pancreatic cancer develop ePI(66%-92%). ePI occurs in patients with type 1(26%-57%) or type 2 diabetes(20%-36%) and is typically mild to moderate; by definition, all patients with type 3 c(pancreatogenic) diabetes have ePI. ePI occurs in untreated celiac disease(4%-80%), but typically resolves on a gluten-free diet. ePI manifests in patients with IBD(14%-74%) and up to 100% of gastrointestinal surgery patients(47%-100%; dependent on surgical site). With the paucity of published studies on PeRT use for these conditions, recommendations for or against PeRT use remain ambiguous. The authors conclude that there is an urgent need to conduct robust clinical studies to understand the validity and nature of associations between ePI and medical conditions beyond those with proven mechanisms, and examine the potential role for PeRT.

关键词： Celiac disease Inflammatory bowel disease exocrine pancreatic insufficiency Malabsorption epidemiology Pancreas Pancreatic cancer Secretion/absorption Surgery

Thinning effects on walnut stem and crown diameter growth and fruiting in the walnut-fruit forests of Kyrgyzstan

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Journal of Mountain Science 2016年第9期13卷 1558-1566页

作者： Jean-Pierre SORG Zora Lea UReCH Davlet MAMADZHAN0v Maik ReHNUS Groupe deforesterie pour le developpement Department of Environmental SciencesETH Zurich8092 ZurichSwitzerland HeL veTAS Swiss Intercooperation 3001 BerneSwitzerland Laboratory of Forest Resources Forest Research Institute720015 BishkekKyrgyzstan Swiss Federal Research Institute WSL Ziircherstrasse 1118903 BirmensdorfSwitzerland

The walnut-fruit forests （Juglans regia L.） in southern Kyrgyzstan are considered to be biodiversity hotspots and of considerable economic and ecological importance to local populations. The fruiting ability and stability of these forests are, however, decreasing because of infrequent silvicultural interventions and non-existent natural regeneration. Continuous inventories and walnut harvest measurements were carded out on 18 trial and control plots over the course of i3 year. Results showed that i） thinning had a positive influence on diameter at breast height （dbh） increase, ii） dbh growth and crown area increases are strongly and positively correlated, iii） large crowns enhanced the production of fruits, and iv） temperature conditions had a major influence on the production of fruits. The above-mentioned points are particularly relevant for young plantations but are also valid for relatively old plantations （〉 50 years）. We conclude that regular thinning substantially improves diameter growth, fruit production and ability of trees to withstand wind and snow damage in both young stands and in older walnut-fruit forests.

关键词： Juglans regia Silviculture Orchardmanagement Fruit harvest Nut production

Genetic variability and divergence studies in pod and seed traits of Pongamia pinnata(L.) Pierre., accessions in Bay Islands

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Journal of Forestry Research 2014年第2期25卷 351-358页

作者： I. Jaisankar M. Sankaran D.R. Singh v. Damodaran Central Agricultural Research Institute Indian Council of Agricultural Research

In this study, we assessed the variability in pod, seed traits and oil content of 24 accessions of Pongamia pinnata collected from different parts of the Andaman and Nicobar Islands, India. The experiment was conducted at the Central Agricultural Research Institute, Port Blair during 2010 to 2011. The variability studies for pod and seed traits revealed that, the accession CPT-6 collected from New Wandoor in South Andaman recorded the maximum values for eight traits viz. pod length （75.51 mm）, pod width （34.62 mm）, pod thickness （17.55 mm）, 100 pod weight （770.33 g）, seed width （21.23 mm）, 100 seed weight （377.00 g）, oil percentage （43.92%） and germination percentage （94.7%）. However, the maximum seed length （26.46 mm） was recorded from CPT 2 and the maximum pod-seed ratio was obtained from CPT 13 and CPT 4 （2.50 and 2.44 respectively）. The phenotypic and genotypic coefficients of variations were also close to each other for all traits, but the 100 pod and seed weight exhibited higher phenotypic and genotypic coefficient of variation than the other traits. estimates of broad sense heritability ranged from 0.30 （for seed length） to 0.95 （pod length） and genetic ad- vance as percent of the mean ranged between 11.66% and 57.40% with seed length giving the lowest value and 100 pod weight giving the high- est value. Both the phenotypic and genotypic correlation between pod length, pod width, pod thickness, 100 pod weight, seed width and 100 seed weight and between pod thickness, 100 pod weight, seed width, 100 seed weight and germination percentage were found to be strong. On the basis of non hierarchical euclidian cluster analysis, 24 accessions were grouped into six clusters. The maximum numbers of seven accessions were included in cluster vI. The maximum intra cluster distance （10.238）shown by cluster vI and the maximum inter cluster distance （17.021） between v and HI followed by III and II （15.942）. Among the six clus- ters formed the cluster III recorded maximum oil

关键词： Pongamia pinnata correlation heritabi!ity genetic gain genetic divergence oil percentage

Space heating and hot water demand analysis of dwellings connected to district heating scheme in UK

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Journal of Central South University 2012年第6期19卷 1629-1638页

作者： R.Burzynski M.Crane R.Yao v.M.Becerra Technologies for Sustainable Built environments University of ReadingReading RG66AFUK SSe Utility Solutions Thatcham RG194AZUK School of Construction Management and engineering University of ReadingReading RG66AFUK School of Systems engineering University of ReadingReading RG66AFUK

To achieve CO2 emissions reductions, the UK Building Regulations require developers of new residential buildings to calculate expected CO2 emissions arising from their energy consumption using a methodology such as Standard Assessment Procedure （SAP 2005） or, more recently SAP 2009. SAP encompasses all domestic heat consumption and a limited proportion of the electricity consumption. However, these calculations are rarely verified with real energy consumption and related CO2 emissions. This work presents the results of an analysis based on weekly heat demand data for more than 200 individual fiats. The data were collected from a recently built residential development connected to a district heating network. A method for separating out the domestic hot water （DHW） use and space heating （SH） demand has been developed and these values are compared to the demand calculated using SAP 2005 and SAP 2009 methodologies. The analysis also shows the variation in DHW and SH consumption with size of flats and with tenure （privately owned or social housing）. evaluation of the space heating consumption also includes an estimate of the heating degree day （HDD） base temperature for each block of fiats and compares this to the average base temperature calculated using the SAP 2005 methodology.

关键词： domestic hot water space heating energy consumption heat demand

呼吸困难灾难化量表的汉化及在COPD患者中的信效度检验

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护理学杂志 2024年第9期39卷 52-55页

作者：卢向敏钮美娥金晓亮赵茜韩燕霞苏州大学附属第一医院护理部江苏苏州215000 苏州大学附属第一医院呼吸与危重症医学科江苏苏州2150003 苏州大学附属第一医院内分泌科江苏苏州215000

目的汉化呼吸困难灾难化量表(Breathlessness Catastrophizing Scale,BCS),并在COPD患者中检验信效度。方法采用Brislin翻译模型,对BCS进行正译、回译、文化调适及预调查形成中文版BCS。通过便利抽样法,选取苏州市5所医院就诊的330例COP... 详细信息

目的汉化呼吸困难灾难化量表(Breathlessness Catastrophizing Scale,BCS),并在COPD患者中检验信效度。方法采用Brislin翻译模型,对BCS进行正译、回译、文化调适及预调查形成中文版BCS。通过便利抽样法,选取苏州市5所医院就诊的330例COPD患者进行调查,验证量表的信效度。结果通过探索性因子分析提取1个公因子,方差贡献率为69.532%;验证性因子分析显示1个条目的标准载荷系数earman-Brown折半信度为0.894,重测信度为0.895。结论中文版BCS信效度良好,可作为中国文化背景下COPD患者呼吸困难灾难化水平的评估工具。

关键词：慢性阻塞性肺疾病呼吸困难灾难化量表汉化信度效度内科护理

A fully-explicit discontinuous Galerkin hydrodynamic model for variably-saturated porous media

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Journal of Hydrodynamics 2014年第4期26卷 594-607页

作者： De MAeT T. HANeRT e. vANCLOOSTeR M. earth and Life Institute Environmental SciencesUniversité catholique de LouvainB-1348 Louvain-la-NeuveBelgium Georges Lema?tre Centre for earth and Climate Research Université catholique de LouvainB-1348 Louvain-la-NeuveBelgium

Groundwater flows play a key role in the recharge of aquifers, the transport of solutes through subsurface systems or the control of surface runoff. Predicting these processes requires the use of groundwater models with their applicability directly linked to their accuracy and computational efficiency. In this paper, we present a new method to model water dynamics in variably- saturated porous media. Our model is based on a fully-explicit discontinuous-Galerkin formulation of the 3D Richards equation, which shows a perfect scaling on parallel architectures. We make use of an adapted jump penalty term for the discontinuous-Galerkin scheme and of a slope limiter algorithm to produce oscillation-free exactly conservative solutions. We show that such an approach is particularly well suited to infiltration fronts. The model results are in good agreement with the reference model Hydrus-lD and seem promising for large scale applications involving a coarse representation of saturated soil.

关键词： 3D subsurface flow model discontinuous Galerkin method slope limiters explicit time integration