检索结果-南通市图书馆

Physical characteristics of conditioned anaerobic digested sludge-A fractal, transient and dynamic rheological viewpoint

引用

Journal of Environmental Sciences 2011年第8期23卷 1266-1273页

作者： Yili Wang Emilie Dieude-Fauvel steven K Dentel college of Environmental Science and Engineering Beijing Forestry University Beijing 100083 China. Department of civil and Environmental Engineering University of Delaware Newark Delaware 19711 USA cemagref Les Palaquins 03150 Montoldre Paris France

The changes in the physical characteristics of unconditioned and conditioned anaerobic digested sludge （ADS） biosolids, such as capillary suction time （cST）, yield stress, average size and fractal dimensions, were investigated through a cST test, transient and dynamic rheological test and image analysis. The results showed that the optimum polymer dose range was observed when cST or its reciprocal value was employed as an indicator. There were good correlations between the yield stresses determined from both a controlled shear stress test and a strain amplitude sweep test. The yield stress and storage modulus （G＇） increased as the polymer dose increased in most cases. A frequency sweep test revealed that polymer conditioning could extend the frequency sweep ranges for their elastic behaviors over viscous behaviors as well as the gel-like structure in the linear viscoelastic range. These results implied that more deformation energy was stored in this rigid structure, and that elastic behavior became increasingly dominant with the addition of the polymer in most cases, In addition, both the average sizes and two-dimensional fractal dimensions for conditioned ADS biosolids presented a similar up-climax-down variation trend as the polymer doses increased, whereas the critical polymer doses at the highest average sizes or two-dimensional fractal dimensions, were different. correlation analysis revealed that the conditioned ADS dewaterability was not correlated with the yield stresses, while the average sizes or the two-dimensional fractal dimensions for conditioned ADS biosolids could be taken as the indication parameters for ADS dewaterability.

关键词： anaerobic digested sludge conditioning dynamic oscillatory test yield stress fractal dimensions polymer dose

来源：

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

Deriving the magnetopause position from wide field-of-view soft X-ray imager simulation

引用

Science china Earth Sciences 2022年第8期65卷 1601-1611页

作者： Yihong GUO Tianran SUN chi WANG steven SEMBAY Aerospace Information Research Institute Chinese Academy of SciencesBeijing100094China National Space Science center Chinese Academy of SciencesBeijing100190China University of chinese Academy of Sciences Beijing100049China School of Physics and Astronomy University of LeicesterLeicesterLE17RHUK

Imaging techniques provide essential information in astronomical and space physics *** Soft X-ray Imager(SXI)will obtain images of the Earth’s magnetosphere via the solar wind charge exchange process in a global ***,it is a challenge to reconstruct its 3-D structures from the observed 2-D image(s).In this paper,a recently proposed method,Tangent Fitting Approach(TFA),is validated to reconstruct the large-scale magnetopause from a single X-ray image obtained by instrument *** is revealed that the large-scale magnetopause under a medium solar wind number density can be well reconstructed,although the locations of maximum X-ray photon counts are scattered in the image due to instrumental effects and diffusive sky *** solar wind number density leads to stronger signals and further leads to better reconstruction *** lower solar wind density,the X-ray maximum photon counts may not be identified from the SXI simulations,preprocessing of the images shall be considered before applying ***,the subsolar magnetopause can be well derived when the satellite is on the dayside orbits.

关键词： Soft X-ray Imager Magnetosphere SMILE TFA

来源：

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

Discussion on Relevance and Studies of Prescription compatibility in chinese Medicine

引用

chinese Journal of Integrative Medicine 2021年第10期27卷 788-793页

作者： Loh cheng Toa steven Goh Xin Yi NTU chinese Medicine clinic Nanyang Technological UniversitySingapore(637551)

With chinese medicine(cM)gaining popularity in recent years,researchers and clinicians have put in much interest and effort into the makings and effects of it,especially after the recent announcement of World Health Orgnitation's incorporation of cM into mainstream medical *** herb has complex properties,coming from its pharmacological properties and the chinese medical principles of organ-directed,taste and dynamic orientational *** use of individual herb in cM is rare,where various herbs/ingredients are mostly found in a prescribed *** fully reveal the effects of cM is a great *** complexity of various herbs in combined effect,the absorption and utility rate by the body,uniqueness of individual physique,sub-types of pathological behaviors and time-line progression of the healing process add on to the complication of understanding the full effect of *** theories such as pathophysiology guidance,pharmacokinetic-pharmacodynamic compatibility method,and Global Systems Biology for Integrative Genomics,Proteomics and Metabolomics,which interactively provide a wider scope,more details,with the consideration of development time-line,may shed more light to revealing the full picture of the effects of compatibility prescription.

关键词： chinese medicine integrative effects methodologies prescription compatibility

来源：

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

H_∞ fault estimation for a class of linear time-delay systems in finite frequency domain

引用

Journal of Systems Engineering and Electronics 2010年第5期21卷 835-841页

作者： Quanchao Dong Maiying Zhong steven X. Ding School of control Science and Engineering Shandong University Jinan 250061 E R. China School of Instrumentation Science and Opto-electronics Engineering Beihang University Beijing 100191 P. R. China Institute for Automatic control and complex Systems University of Duisburg-Essen Duisburg 47057 Germany

This paper deals with the problem of H∞ fault estimation for linear time-delay systems in finite frequency *** a generalized coordinate change is applied to the original system such that in the new coordinates all the time-delay terms are injected by the system＇s input and *** an observer-based H∞ fault estimator with input and output injections is proposed for fault estimation with known frequency *** the aid of Generalized Kalman-Yakubovich-Popov lemma,sufficient conditions on the existence of the H∞ fault estimator are derived and a solution to the observer gain matrices is obtained by solving a set of linear matrix ***,a numerical example is given to illustrate the effectiveness of the proposed method.

关键词： fault estimation time-delay generalized coordinate change generalized Kalman-Yakubovich-Popov lemma finite frequency domain.

来源：

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

Better renal replacement therapy to improve sexual function in female patients with end-stage renal disease:A cross-sectional study

引用

current Urology 2024年第3期18卷 232-236页

作者： Tjahjodjati Tjahjodjati steven steven Urology Department Hasan Sadikin Academic Medical CenterUniversitas PadjadjaranBandungIndonesia

Background Sexual dysfunction is commonly observed in patients with end-stage renal disease(ESRD).Sexual dysfunction in correlation with ESRD is associated with physiological and psychological problems resulting in low sexual desire,arousal,difficulties in achieving orgasm,and pain during *** on female sexual dysfunction(FSD)in correlation with renal replacement therapy are limited,and previous studies reporting contradictive results have indicated that the best modality for providing better outcomes(especially on FSD)remains ***,this study aimed to compare the sexual function between female patients with ESRD who were on continuous ambulatory peritoneal dialysis(cAPD)and those on hemodialysis(HD).Materials and methods This study enrolled female patients who were randomly selected from the urology and renal division of the Internal Medicine Outpatient clinic of our hospital from January 2020 to August 2021 and divided into the following groups:predialysis,HD,cAPD,and control *** participants were asked to fill out the Female Sexual Function Index(FSFI)questionnaires,and their data were recorded and analyzed using GraphPad Prism *** Of the 280 patients,200 female patients were included in this *** rate of FSD(cutoff:26.55)was 42%in the control group,72%in the predialysis group,62%in the cAPD group,and 66%the in HD *** control group had a higher mean score in all parameters(pcore indicated no significant difference(p>0.05)between the patients on HD and those on cAPD;the mean of each point was almost identical except for satisfaction,which was higher among patients on cAPD(pcant differences in the components of desire,arousal,orgasm,and satisfaction were observed between the *** Patients on cAPD had better FSFI scores than the female patients with ESRD who were on HD,and the scores of both groups of patients were better than those of the predialysis group.

关键词： Female sexual dysfunction chronic kidney disease continuous ambulatory peritoneal dialysis Hemodialysis

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

compressive deformation of ultralong amyloid fibrils

引用

Acta Mechanica Sinica 2010年第6期26卷 977-986页

作者： Raffaella Paparcone steven cranford Markus J.Buehler Laboratory for Atomistic and Molecular Mechanics

Involved in various neurodegenerative diseases, amyloid fibrils and plaques feature a hierarchical structure, ranging from the atomistic to the micrometer *** the atomistic level,a dense and organized hydrogen bond network is resembled in a beta-sheet rich secondary structure, which drives a remarkable stiffness in the range of 10-20GPa,larger than many other biological nanofibrils, a result confirmed by both experiment and ***, the understanding of how these exceptional mechanical properties transfer from the atomistic to the nanoscale remains *** we report a multiscale analysis that, from the atomistic-level structure of a single fibril,extends to the mesoscale level,reaching size scales of hundreds of *** use parameters directly derived from full atomistic simulations of Aβ（1-40） amyloid fibrils to parameterize a mesoscopic coarse-grained model,which is used to reproduce the elastic properties of amyloid *** then apply our mesoscopic model in an analysis of the buckling behavior of amyloid fibrils with different lengths and report a comparison with predictions from continuum beam theory. An important implication of our results is a severe reduction of the effective modulus due to buckling,an effect that could be important to interpret experimental results of ultralong amyloid *** model represents a powerful tool to mechanically characterize molecular structures on the order of hundreds of nanometers to micrometers on the basis of the underlying atomistic *** work provides insight into structural and mechanical properties of amyloid fibrils and may enable further analysis of larger-scale assemblies such as amyloidogenic bundles or plaques as found in disease states.

关键词： Amyloid coarse-grain Molecular simulation Nanomechanics Materiomics

来源：

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

Real-world emission factors for caterpillar 797B heavy haulers during mining operations

引用

Particuology 2016年第5期14卷 22-30页

作者： Xiaoliang Wang Judith c. chow steven D. Kohl Kevin E. Percy Allan H. Legge John G. Watson Desert Research Institute 2215 Raggio Parkway Reno NV 895J2 USA Graduate Faculty University of Nevada Reno NV89503 USA The State Key Laboratory of Loess and Quaternary Geology Institute of Earth Environment Chinese Academy of Sciences Xi'an 710075 China Wood Buffalo Environmental Association 330 Thickwood Boulevard Fort McMurray AB Canada 7DK 1 Y1 Biosphere Solutions 1610 1 lth Avenue N.W. Calgary AB Canada T2N IG9

Real-world fuel-based emission factors （EFs） from caterpillar 797B diesel heavy haulers when used for oil sands mining operations were measured using an on-hoard portable emissions monitoring system. Average EFs （in g/kg fuel） for 16 separate tests on four trucks were 3150 ± 4 for cO2, 2.51 ± 1.30 for cH4, 10.28 ± 3.21 for cO, 0.61 ± 0.32 for non-methane hydrocarbons, 55.49 ± 9,75 for NOx （reported as NO2）, 0.70 ± 0.17 for PM2.s （mass of particles with aerodynamic diameter 〈2.5 μm）, and 0.34 ± 0.05 for black carbon （Bc）. Ultrafine particle numbers averaged （4.7 ± 4.1 ） × 10^15 particleslkg fuel. Fuel-based EFs of NO, NO2, and particle numbers were higher during idling, whereas PM2.5 and Bc EFs were higher during traveling without a load. A comparison of emissions with those reported by oil sands facilities showed large variations, both among the facilities and between the reported emissions and the real-world measurements.

关键词： Heavy hauler Emission Nonroad Portable emissions measurement system Mining Oil sands

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effect of compressibility on bubbly cavitating flows

引用

Journal of Hydrodynamics 2020年第1期32卷 1-5页

作者： Harish Ganesh Anubhav Bhatt Juliana Wu steven ceccio Department of Naval Architecture and Marine Engineering University of MichiganAnn ArborMichiganUSA

cavitating bubbly flows can form in separated flows and shear layers leading to local regions high vapor void fraction,and these flows often exhibit periodic shedding of vaporous ***,the presence of a liquid re-entrant flow,driven by the kinematics of liquid flow stagnation,has been identified as an important mechanism leading to cavity ***,high local vapor void fractions can also result in a reduced mixture speed of sound and a possible supersonic *** recent findings on different geometries indicate that propagating bubbly shocks in these flows are a primary mechanism of flow *** this study,we discuss the effect of compressibility on four geometries,mainly in the generation of propagating bubbly shocks that can influence the cavitation shedding *** order to elucidate the differences and similarities of the observed cavitation dynamics,and the influence of compressibility,we report observations from a backward facing step,backward facing wedge,NAcA0015 hydrofoil,and a bluff body with a wedge cross section.

关键词： cavitation bubbly shocks compressible vapor-liquid flows

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Multi-disciplinary approaches to water systems:introduction to the special column

引用

Frontiers of Earth Science 2020年第2期14卷 251-255页

作者： steven RFASSNAcHT Mingguo MA ESS-Watershed Science Colorado State UniversityFort CollinsCO 80523-1476USA cooperative Institute for Research in the Atmosphere Fort CollinsCO 80523-1375USA Natural Resources Ecology Laboratory Fort CollinsCO 80523-1499USA Research Base of Karst Eco-environments at Nanchuan in chongqing Ministry of Nature ResourcesSchool of Geographical SciencesSouthwest UniversityChongqing 400715China

1 Introduction As the human population grows,the livelihoods and well-being of a significant portion of humanity will depend even more on the ability of freshwater ecosystems to provide essential services(Vörösmarty et al.,2010),which will require the maintenance of biodiversity in these freshwater systems(Dudgeon et al.,2006).There are many competing demands on the available water resources,such as potable water,fish and wildlife habitat,agriculture,industrial use,and recreation,that are driven by different sectors;even within a specific sector there can be diverging *** example,water management of the Upper Arkansas River in colorado has been mandated by the 1949 Arkansas River compact between the US states of colorado and Kansas which has led to stream-aquifer issues(Taylor and Luckey,1974),water transfers from agriculture to urban(Howe et al.,1990),and competing recreational uses(Wollmuth et al.,1985;Arkansas Basin Roundtable,2017).The recent Upper Arkansas Voluntary Flow Management Program tries to balance many users,including recreation by kayakers and rafters who want to maintain streamflow(at the Wellsville gauge)at or greater than 20 m3/s as well as anglers who want lower flows in the range of 7 to 11 m3/s to maintain fish habitat(Arkansas Basin Roundtable,2017).

关键词： Upper habitat maintain

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

current status of laparoscopy for the treatment of rectal cancer

引用

World Journal of Gastroenterology 2014年第41期20卷 15125-15134页

作者： Noam Shussman steven D Wexner Department of colorectal Surgery Cleveland Clinic Florida

Surgery for rectal cancer in complex and entails many *** the laparoscopic approach in general and specific to colon cancer has been long proven to have short term benefits and to be oncologically safe,it is still a debatable topic for rectal *** attempt to benefit rectal cancer patients with the known advantages of the laparoscopic approach while not compromising their oncologic outcome has led to the conduction of many studies during the past *** we describe our technique for laparoscopic proctectomy and assess the current literature dealing with short term outcomes,immediate oncologic measures(such as lymph node yield and specimen quality) and long term oncologic outcomes of laparoscopic rectal cancer *** also briefly evaluate the evolving issues of robotic assisted rectal cancer surgery and the current innovations and trends in the minimally invasive approach to rectal cancer surgery.

关键词： Laparoscopy Rectal cancer Minimally invasive surgery Oncological outcomes Short term benefits

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：