检索结果-南通市图书馆

Journal of Bionic Engineering 2022年第2期19卷 471-482页

作者： Bosheng Liu Tanvir R.Faisal School of Architecture and Design University of Louisiana at LafayetteLafayetteLA 70503USA Department of Mechanical Engineering University of Louisiana at LafayetteLafayetteLA 70503USA

Bio-inspired architectural designs are often superior for their aesthetics and structural *** forms and loading states of a biological structure is complex as it requires a delicate balance among geometry,material properties,and interacting *** goal of this work is to design a biomimetic,ultra-lightweight,bending-active structure utilizing an informed integral design approach,and thereby constructing a self-supporting cellular pavilion.A bioinspired pavilion has been designed and constructed based on the natural cellular organization observed in Radiolaria,a deep-sea *** cellularity was mimicked via Voronoi tessellation in the structure of the pavilion,whose structural performance was evaluated using finite element ***,funicular structure design strategies were studied with a focus on cellular distributions and concentration responding to areas with high structural *** computer aided custom designed pavilion was constructed with engineered,in-house fabricated fiberglass composite *** bending-active lightweight structure was also validated through material performance inquiry,a partial full-scale cellular assembly,and the full-size pavilion *** work contributes to the design approach comprising a bending-active form-finding schematic strategy to construct the elastic bending-active structure physically and simulate computationally within the context of nature inspired innovative lightweight structure design.

关键词： Biomimetic design Double-curved shell pavilion Voronoi tessellation Bending-active structures Finite element analysis

High-throughput phenotyping identifies plant growth differences under well-watered and drought treatments

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

Journal of Integrative Agriculture 2020年第10期19卷 2429-2438页

作者： Seth TOLLEY Yang YANG Mohsen MOHAMMADI Department of Agronomy Purdue UniversityWest LafayetteIN 47907United States college of Agricuture Department of AgronomyPurdue UniversityWest LafayetteIN 47907United States

The ability to screen larger populations with fewer replicates and non-destructive measurements is one advantage of high-throughput phenotyping(HTP)over traditinal phenotyping *** this study,two wheat accessions were grown in a controlled-environment with a moderate drought imposed from stem elongation to ***-green-blue(RGB)imaging was performed on 17 of the 22 d following the start of drought *** measurements from all plants were performed at the conclusion of the *** effect of line was signifcant for shoot dry matter,spike dry matter,root dry matter,and tller number,while the water treatment was significant on shoot dry matter and root dry *** temporal,non-destructive nature of HTP allowed the drought treatment to be significantly differentiated from the well-watered treatment after 6 d in a line from Argentina and 9 d in a line from *** difference of 3 d indicated an increased degree of drought tolerance in the line from ***,HTP from the final day of imaging accurately predicted reference plant height(r=1),shoot dry matter(r=0.95)and tller number(r=0.91).This experiment ilustrates the potential of HTP and its use in modeling plant growth and development.

关键词： high-throughput phenotyping drought controlled-environment wheat

Embryology of Iris sanguinea Donn ex Horn. and its systematic relationship

在线全文

学校读者我要写书评

暂无评论

Journal of Forestry Research 2019年第6期30卷 2007-2020页

作者： Lijuan Fan Karl H.Hasenstein Ling Wang college of Landscape Architecture Northeast Forestry UniversityHarbin 150040People’s Republic of China Department of Biology University of Louisiana at LafayetteLafayetteLA 70504USA

Iris sangumea Dorm ex Horn. is a perennial cold-tolerant herbs of the Iris genus of Iridaceae, which has a well-formed, bright color and adaptability. Through understanding the fl ower bud differentiation, Sporogenesis, gametogenesis, fertilization and embryogenesis of I. sangumea, we developed fl owering regulation and control breeding. I. sangumea fl ower bud differentiation was observed in April for 21 days; in this stage, the early differentiation process was slow, temperature was more than 5 °C, if the temperature is shorter than this, most fl ower bud will have no differentiation, and turn to vegetative growth; later differentiation is faster and required temperature is from 5 to 8 °C and gradually rose to 10-12 °C. The temperature in April plays the defi nitely role in the number of bud differentiation. Three stamina contain tetrasporangiate anthers and a glandular tapetum. The anther wall is composed of four cell layers inclduding the epidermis, the endothecium, one middle layer and the secretory tapetum. The type of anther wall development the dicotyledonous type. After pollen maturation, the anther wall forms a double-layer containing only epidermis and endothecium. Simultaneous cytokinesis is of the continuous type during meiosis of microspore mother cell results in a zygomorphous or tetragonal tetrad. Mature pollen grains are two-celled. I. sangumea ’s stylar canal is hollow, open type style, and the gynoecium has three carpels. The ovaries have axial placentas. The ovule is anatropous, bitegmic and crassinucellate. The primary sporogenous cell differentiates directly as the megaspore. The megaspore tetrads are linear, T-shaped or juxtaposed. Generally, the fi rst of the tetrad megaspores at the chalaza becomes functional while the other three degenerate. A mature embryo sac with seven cells and eight nuclei embryo sac is of the polygonum type. For dichogamy, the male gametophyte matures about 2 days earlier than the female gametophyte. The pollen tube e

关键词： Iris sanguinea Donn ex Horn Flower bud diff erentiation Embryology

Mathematical modeling of heat transfer in counter-current multiphase flow found in gas-drilling systems with formation fluid influx

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2017年第4期14卷 711-719页

作者： Boyun Guo Jun Li Jinze Song Gao Li Petroleum Engineering Department University of Louisiana at Lafayette college of Petroleum Engineering Southwest Petroleum University college of Petroleum Engineering China University of Petroleum

The performance of gas-drilling(drilling oil and gas wells with air, nitrogen, or natural gas) is very unpredictable in many areas due to lack of proper design of drilling parameters because of limited understanding of gas–rock interaction which requires knowledge of heat transfer in the well system. Complete analysis of rock failure requires an accurate mathematical model to predict gas temperature at the bottom hole. The currently available mathematical models are unsuitable for use for the purpose because they do not consider the effects of formation fluid influx, Joule–Thomson cooling, and entrained drill cuttings. A new analytical solution for predicting gas temperature profiles inside the drill string and in the annulus was derived in this study for gas-drilling, considering all these three effects. Results of sensitivity analyses show that formation fluid influx can significantly increase the temperature profiles in both the drill string and the *** Joule–Thomson cooling effect lowers the temperature in the annulus only in a short interval near the bottom *** drill cuttings entrained at the bottom hole can slightly increase the temperature profile in the annulus.

关键词： Gas-drilling Temperature Prediction Influx Joule–Thomson Cuttings

A perspective on recent findings and future strategies for reactive aldehyde removal in spinal cord injury

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2023年第10期18卷 2190-2191页

作者： Seth A.Herr Anna J.Prall Riyi Shi Center for Paralysis Research Purdue UniversityWest LafayetteINUSA Department of Basic Medical Sciences College of Veterinary MedicinePurdue UniversityWest LafayetteINUSA Weldon School of Biomedical Engineering Purdue UniversityWest LafayetteINUSA

Acrolein in spinal cord injury:The propensity of reactive aldehydes such as acrolein to both initiate and perpetuate tissue damage after spinal cord injury (SCI) is well *** primarily from lipid peroxidation,acrolein is known to be one of the most reactive *** will quickly overwhelm endogenous clearance mechanisms and antioxidants,and form adductswith lipids,proteins,and DNA.

关键词： aldehydes finding primarily

Representation stigma： Perceptions of tools and processes for design graphics

在线全文

学校读者我要写书评

暂无评论

Frontiers of Architectural Research 2016年第4期5卷 477-488页

作者： David Barbarash Horticulture and Landscape Architecture College of Agriculture Purdue University West Lafayette IN47906 USA

Practicing designers and design students across multiple fields were surveyed to measure preference and perception of traditional hand and digital tools to determine if common biases for an individual tootset are realized in practice. Significant results were found, primarily with age being a determinant in preference of graphic tools and processes; this finding demonstrates a hard line between generations of designers. Results show that white there are strong opinions in tools and processes, the realities of modern business practice and production gravitate towards digital methods despite a traditional tool preference in more experienced designers. White negative stigmas regarding computers remain, younger generations are more accepting of digital toots and images, which should eventually lead to a paradigm shift in design professions.

关键词： Design toots Design communication Design technotogy Design process

Co-evolution of plant LTR-retrotransposons and their host genomes

在线全文

学校读者我要写书评

暂无评论

Protein & Cell 2013年第7期4卷 493-501页

作者： Meixia Zhao Jianxin Ma Department of Agronomy Purdue UniversityWest LafayetteIN 47907USA college of Life Sciences Qingdao Agricultural UniversityQingdao 266109China

Transposable elements(TEs),particularly,long terminal repeat retrotransposons(LTR-RTs),are the most abun-dant DNA components in all plant species that have been investigated,and are largely responsible for plant genome size *** plant genomes have experi-enced periodic proliferation and/or recent burst of LTR-retrotransposons,the majority of LTR-RTs are inactivated by DNA methylation and small RNA-mediated silencing mechanisms,and/or were deleted/truncated by unequal homologous recombination and illegitimate recombina-tion,as suppression mechanisms that counteract genome expansion caused by LTR-RT amplifi ***-RT DNA is generally enriched in pericentromeric regions of the host genomes,which appears to be the outcomes of pref-erential insertions of LTR-RTs in these regions and low effectiveness of selection that purges LTR-RT DNA from these regions relative to chromosomal *** functions of various TEs in their host genomes remain blurry;nevertheless,LTR-RTs have been recognized to play important roles in maintaining chromatin structures and centromere functions and regulation of gene expres-sions in their host genomes.

关键词： LTR-retrotransposons recombination evolu-tion epigenetic regulation plants

Screening Torture in The Message： The Body and Soul of a Genre Film

在线全文

学校读者我要写书评

暂无评论

Frontiers of Literary Studies in China-Selected Publications from Chinese Universities 2018年第1期12卷 102-126页

作者： Li YANG Department of Foreign Languages and Literatures Lafayette College Easton PA 18042USA

The 2009 hit espionage thriller The Message （Fengsheng 风声） was widely regarded as a milestone in Chinese genre filmmaking in the new millennium. Differing from Socialist espionage films, contemporaneous espionage TV series as well as its literary original, the film is first and foremost characterized by its plenitude of torture scenes. A textual critique on these torture scenes reveals the generic elements from both Socialist revolutionary classics and American horror films. The genre mixing in The Message produces the sensorial pleasure of a body genre film while being safeguarded by its revolutionary packaging. As a specimen of the Chinese private film sector＇s aggressive dual commercial and political campaign, The Message illustrates the strategies of Chinese genre filmmaking and manifests the splitting logic in the Chinese film industry.

关键词： Chinese commercial cinema espionage thriller The Message,Chinese genre film torture body

Intracellular uptake of nanocrystals:Probing with aggregation-induced emission of fluorescence and kinetic modeling

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

Acta Pharmaceutica Sinica B 2021年第4期11卷 1021-1029页

作者： Jifen Zhang Clairissa DCorpstein Tonglei Li college of Pharmaceutical Sciences Southwest UniversityChongqing 400716China Department of Industrial and Physical Pharmacy Purdue UniversityWest LafayetteIN 47907USA

Nanocrystal formulations have been explored to deliver poorly water-soluble drug *** various studies of nanocrystal formulation and delivery,much more understanding needs to be gained into absorption mechanisms and kinetics of drug nanocrystals at various levels,ranging from cells to tissues and to the whole *** this study,nanocrystals of tetrakis(4-hydroxyphenyl)ethylene(THPE)with an aggregation-induced emission(AIE)property was used as a model to explore intracellular absorption mechanism and dissolution kinetics of *** uptake studies were conducted with KB cells and characterized by confocal microscopy,fow cytometry,and quantitative *** results suggested that THPE nanocrystals could be taken up by KB cells directly,as well as in the form of dissolved *** cellular uptake was found to be concentration-and *** addition,the intracellular THPE also could be exocytosed from cells in forms of dissolved molecules and *** modeling was conducted to further understand the cellular mechanism of THPE nanocrystals based on frst-order ordinary differential equations(ODEs).By ftting the kinetic model against experimental measurements,it was found that the initial nanocrystal concentration had a great infuence on the dynamic process of dissolution,cellular uptake,and exocytosis of THPE *** the nanocrystal concentration increased in the culture media,dissolution of endocytosed nanocrystals became enhanced,subsequently driving the effux of THPE molecules from cells.

关键词： Nanocrystal Intracellular uptake Aggregation-induced emission Pharmacokinetics Tetrakis(4-hydroxyphenyl)ethylene Fate Dissolution kinetics Absorption mechanism

High-throughput phenotyping for plant growth and biomass yield of switchgrass under a controlled environment

在线全文

学校读者我要写书评

暂无评论

Grass Research 2022年第1期2卷 26-32页

作者： Yiwei Jiang Yang Yang Department of Agronomy Purdue UniversityWest LafayetteIN 47907USA Institute for Plant Sciences College of AgriculturePurdue UniversityWest LafayetteIN 47907USA

Switchgrass(Panicum virgatum L.)is a native and prominent perennial grass species used for ***-throughput phenotyping of biomass component traits is desirable for switchgrass improvement and *** objective of this study was to establish correlations between the manually measured traits and image-extracted measurements in switchgrass grown in a controlled ***-green-blue(RGB)images from side-and top-views were automatically collected from the plants varying in growth stages for assessing their relationships with manually measured *** height,tiller number,crown diameter,and shoot dry weight were all significantly correlated with RGB image-based measurements including side-view height(SHT),side convex hull(SCH),side projected area(SPA),top convex hull(TCH),and top projected area(TPA).For a particular plant trait,a good prediction was observed based on an image-based measurement,including plant height and SHT(R2=0.992),tiller number and SPA(R2=0.86),crown diameter and SCH(R2=0.72),and shoot dry weight and SPA(R2=0.88).Plant height was also well predicted by SCH(R2=0.94)and SPA(R2=0.88).Overall,SHT,SCH,and SPA extracted from RGB images well predicted plant height,tiller number and shoot dry *** results demonstrated that the image-based parameters could be leveraged in quantifying the growth and development of switchgrass.

关键词： image crown switch