检索结果-南通市图书馆

A Novel Approach for Developing a Linear Regression Model within Logistic Cluster Using Scikit-Learn

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 Data Analysis and information Processing 2024年第3期12卷 348-369页

作者： Nwosu Ambrose Gilbert i. O. Aimufua Choji Davou Nyap Departments of Computer Sciences Nasarawa State University Keffi Nigeria Departments of Computer Sciences University of Jos Jos Nigeria

Due to the rapid development of logistic industry, transportation cost is also increasing, and finding trends in transportation activities will impact positively in investment in transportation infrastructure. There is limited literature and data-driven analysis about trends in transportation mode. This thesis delves into the operational challenges of vehicle performance management within logistics clusters, a critical aspect of efficient supply chain operations. it aims to address the issues faced by logistics organizations in optimizing their vehicle fleets’ performance, essential for seamless logistics operations. The study’s core design involves the development of a predictive logistics model based on regression, focused on forecasting, and evaluating vehicle performance in logistics clusters. it encompasses a comprehensive literature review, research methodology, data sources, variables, feature engineering, and model training and evaluation and F-test analysis was done to identify and verify the relationships between attributes and the target variable. The findings highlight the model’s efficacy, with a low mean squared error (MSE) value of 3.42, indicating its accuracy in predicting performance metrics. The high R-squared (R2) score of 0.921 emphasizes its ability to capture relationships between input characteristics and performance metrics. The model’s training and testing accuracy further attest to its reliability and generalization capabilities. in interpretation, this research underscores the practical significance of the findings. The regression-based model provides a practical solution for the logistics industry, enabling informed decisions regarding resource allocation, maintenance planning, and delivery route optimization. This contributes to enhanced overall logistics performance and customer service. By addressing performance gaps and embracing modern logistics technologies, the study supports the ongoing evolution of vehicle performance management

关键词： Mean Squared Error R2 Score F-Test MSE

Antibiotic prophylaxis and infectious complications in patients on peritoneal dialysis undergoing lower gastrointestinal endoscopy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Gastroenterology Report 2020年第5期8卷 407-409,I0003页

作者： William T.Clarke Venkata R.Satyam David i.Fudman Samantha Zullow Kashika G.Goyal Katerina LByanova Christopher Huang Joseph D.Feuerstein Division of Gastroenterology Department of MedicineBeth Israel Deaconess Medical CenterHarvard Medical SchoolBostonMAUSA Department of Medicine Boston Medical CenterBoston University School of MedicineBostonMAUSA Present affiliation:Division of Digestive and Liver Diseases Department of Internal MedicineUniversity of Texas Southwestern Medical CenterDallasTXUSA Present affiliation:Division of Gastroenterology and Hepatology New York University Langone Medical CenterNew York University School of MedicineNew YorkNYUSA Department of Medicine Beth Israel Deaconess Medical CenterHarvard Medical SchoolBostonMAUSA Section of Gastroenterology Department of MedicineBoston Medical CenterBoston University School of MedicineBostonMAUSA

introduction Peritoneal dialysis(PD)is widely used for the treatment of endstage renal *** treated with PD have similar outcomes to those treated with hemodialysis[1].However,PDrelated infections including peritonitis have been reported at 1.66 episodes per patient per year[2].One possible source of peritonitis is gastrointestinal(Gi)endoscopic *** 2005,the international Society for Peritoneal Dialysis(iSPD)published guidelines suggesting antibiotics be given to PD patients prior to colonoscopy[3].This suggestion was mostly based on expert opinion and a theoretical concern that patients undergoing colonoscopy are at increased risk for enteric peritonitis from bacterial translocation across the bowel *** there is no direct evidence to support this theory,case reports have suggested a risk of transient bacteremia associated with colonoscopy.

关键词：预防性抗生素消化道内镜检查感染性并发症

Abdominal migraine reviewed from both central and peripheral aspects

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 Experimental Medicine 2012年第4期2卷 75-77页

作者： Yosuke Kakisaka Mitsugu Uematsu Zhong i Wang Kazuhiro Haginoya Department of Pediatrics Tohoku University School of Medicine Sendai Miyagi 980-8574 Japan The Cleveland Clinic Cleveland OH 44195 United States

Despite the 2%-5% prevalence of abdominal migraine(AM) during childhood, the precise mechanism remains unknown. in this review, we present recent studies on AM and speculate its mechanism from both peripheral and central nervous system aspects. Although the main symptoms of AM exist at the peripheral level, previous studies have reported possible dysfunction of central nervous system, including photophobia, phonophobia and abnormal visual evoked responses. Recently, a case has been reported with AM combined with "Alice in Wonderland" syndrome with visual and/or bodily distortions, which serves as another piece of evidence of central dysfunction. Another case reported an AM patient having peculiar stereotypical ecchymosis in the legs and buttocks associated with pain attack, which implied possible involvement of peripheral nervous system. Although further investigations and accumulation of AM cases are still needed, we believe that the schema hypothesized here is helpful to plan furtherexperimental approach to clarify the mechanism of this peculiar disease.

关键词： Migraine equivalent Abdominal migraine Central hypersensitivity Visceral hypersensitivity Sumatriptan

The image Conversion in Optical Echo-Holography by External Electromagnetic Standing Waves

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Optics and Photonics Journal 2016年第1期6卷 1-7页

作者： Guzel i. Garnaeva Leonid A. Nefediev Alsu R. Sakhbieva Department of Educational Technologies in Physics Kazan Federal University Kazan Russia

The recording and playback of information using a reverse stimulated photon—echo hologram when exposed to the recording medium pulse of non-resonant electromagnetic standing wave was considered. it was shown that the spatial intensity distribution in stimulated echo hologram response depended on the electric field intensity of non-resonant standing wave that allowed controlling by a reproducible image.

关键词： Data Recording Playback information A Reverse Stimulated Echo Hologram Standing Wave Control of the Reproduced image

The restriction endonuclease Tru9i is a useful tool to analyze telomere sequences separately from interstitial telomeric sequences in <i>Arabidopsis thaliana</i>

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

American Journal of Molecular Biology 2012年第3期2卷 242-244页

作者： María i. Vaquero-Sedas Miguel A. Vega-Palas instituto de Bioquímica Vegetal y Fotosíntesis CSIC-Universidad de Sevilla Seville Spain

We have previously described a simple method to analyze the chromatin structure of Arabidopsis telomeres independently of that of interstitial Telomeric Sequences (iTSs). By using this method, we found that, whereas iTSs are heterochromatic, Arabidopsis telomeres exhibit euchromatic features [1]. Some concerns have been recently raised about the accuracy of this procedure [2]. Here, we summarize these concerns and justify our experimental approaches and interpretation of results.

关键词： Arabidopsis thaliana telomeres iTSs euchromatin heterochromatin

Frequently cutting restriction enzymes: Clearing the fog to see the ends

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

American Journal of Molecular Biology 2013年第1期3卷 59-61页

作者： María i. Vaquero-Sedas Miguel A. Vega-Palas institute of Vegetal Biochemistry and Photosynthesis CSIC-University of Seville Seville Spain

Telomeres, which are found at the ends of eukaryotic chromosomes, are composed of tandem arrays of repetitive sequences and safeguard genomic stability. Previous studies have revealed that telomeric repeats are also present at internal chromosomal loci in many eukaryotes. However, the biological role of these interstitial telomeric sequences (iTSs) remains unknown. The integrity of telomeric length and chromatin structure is required for telomere stability. However, the study of these telomeric features can be impeded by the presence of iTSs. Frequently cutting restriction enzymes have been revealed to be very useful tools for the study of the length and chromatin structure of telomeres independent of the presence of iTSs.

关键词： Telomeric Length Telomeric Chromatin Structure Frequently Cutting Restriction Enzymes Arabidopsis thaliana

Assessing the Role of Waste Pickers in the Recycling industry in Accra Metropolis

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 Geoscience and Environment Protection 2020年第10期8卷 73-87页

作者： i. K. Kwarteng Davor Kontič Tine Bizjak Branko Kontič Department of Nuclear Science and Applications Graduate School of Nuclear and Allied Sciences University of Ghana Legon Accra Nuclear Chemistry and Environmental Research Centre Ghana Atomic Energy Commission Legon Accra Department of Environmental Sciences Jo&#382 ef Stefan institute Ljubljana Slovenia international Postgraduate School Jo&#382 ef Stefan institute Ljubljana Slovenia

Despite their contributions to solving specific waste management issues by collecting recyclables, waste-pickers are maligned when waste management policies are formulated. The purpose of this study was to assess and expose the beneficial economic and environmental protection role of waste pickers and how they can be integrated into the solid waste management system. The study imposed both quantitative and qualitative data collection method (mixed method research). The primary data were sourced through face-to-face in-depth interviews with operators and managers of the dumpsites. The selected waste pickers were asked to fill a questionnaire that brought to the fore all that their work entails from the number of recyclables recovered to their occupational health and safety. Results show that the volume of waste retrieved from the waste stream at the three dumpsites in Accra metropolis is less than 1% per annum. The waste pickers, if integrated into the waste management system and motivated, could help in reviving the recycling industry which would reduce the pressure on virgin materials and the environment. it is also their source of livelihood. The benefits are mutual.

关键词： Waste-Pickers Solid Waste Management Recyclables Dumpsites Policies

is varicocele repair necessary, given the advanced state of assisted reproductive technologies？

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2016年第3期18卷 349-349页

作者： Ryan P Smith Larry i Lipshultz Jason R Kovac University of Virginia Department of Urology Charlottesville VA 22908 USA Scott Department of Urology Baylor College of Medicine Houston Texas 77030USA Men's Health Center 8240 Naab Road Suite 220 Indianapolis Indiana46260 USA

Approximately, 1.6% of all infants born in the United States are conceived using assisted reproductive technologies （ARTs）. With the growing rise of ART, questions have been raised about the utility of varicocele repair. While the ability ofa microsurgical varicocele repair to improve semen parameters has been established, there remains no standard definition as to what constitutes significant improvements in semen parameters following varicocele repair. The majority of trials have observed enhanced parameters （specifically concentration and motility） as well as increased fertility.

关键词： @@

Band Structure of AlSb Nanoclusters

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 Condensed Matter Physics 2012年第3期2卷 129-132页

作者： Haider i. isa Ahmed M. Abdul-Lettif Physics Department College of Science University of Babylon Hilla Iraq

Ab initio restricted Hartree-Fock method within the framework of large unit cell formalism is used to investigate the band structure of AlSb nanoclusters. Large unit cells of 8, 16, 54, 64 and 128 atoms are used to analyze the cohesive energy, energy gap, valence bandwidth, and the density of states of the energy levels for AlSb nanoclusters. The results of the present work revealed that the band structure of AlSb nanoclusters differs significantly from that of the bulk AlSb crystal. Also, it is found that the valence band width and the cohesive energy (absolute value) increase as the AlSb crystal size increases, and they tend to stabilize for nanoclusters of more than 50 atoms.

关键词： Nanocluster Band Structure AlSb