检索结果-南通市图书馆

Open Journal of Applied sciences 2024年第2期14卷 545-560页

作者： Jean fidele Nzihou salou Hamidou Ousmane Zoundi Frederic Ouattara Bila Gerard segda Formation and Research Unit in sciences and Technologies University Norbert ZONGO Koudougou Burkina-Faso

The operation of biomass treatment devices such as gasifiers is based on the control of key parameters that play an important role in product formation. These include: temperature, excess oxygen, relative humidity and biomass composition. This work focuses on excess oxygen and temperature. Unfortunately, flue gas oxygen analyzers are expensive and not accessible to small industries. However, the equivalence ratio is linked to excess oxygen and has the advantage of not depending on biomass composition. This study therefore focuses on the design and development of a device for controlling this equivalence ratio by measuring oxygen concentration using a self-propelled Lambda probe, and a system for monitoring this equivalence ratio using an Arduino Uno 3 microcontroller. The temperature is recorded with an accuracy of ±1.5°C. For a heating time of 10 minutes, the response time to temperature change is around 3 seconds, which is sufficient for the device to function properly. This simple device is an efficient and cost-effective means of checking the equivalence ratio.

关键词： Equivalence Ratio Biomass Gasification Lambda sensor Microcontroller C++

Outcome of bariatric surgery in patients with unexpected liver cirrhosis: A multicenter study from China

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Liver Research 2024年第3期8卷 172-178页

作者： Xia sun Libin Yao Xing Kang Weihua Yu fidele Kakule Kitaghenda Mohammad sajjad Ibn Rashid Angeline Nogue Taguemkam Jian Hong Zhiyong Dong Xitai sun Xiaocheng Zhu Department of Gastrointestinal surgery The Affiliated Hospital of Xuzhou Medical UniversityXuzhouJiangsuChina Department of Pancreatic and Metabolic surgery Nanjing Drum Tower HospitalAffiliated Hospital of Medical SchoolNanjing UniversityNanjingJiangsuChina Department of General surgery Sir Run Run Shaw HospitalZhejiang University School of MedicineHangzhouZhejiangChina Department of Metabolic and Bariatric surgery The First Affiliated Hospital of Jinan UniversityGuangzhouGuangdongChina

Background and aims Liver cirrhosis is a complex disease that may result in increased morbidity and mortality following bariatric surgery(Bs).This study aimed to explore the outcome of Bs in patients with unexpected cirrhosis,focusing on postoperative complications and the progression of liver *** A retrospective study of bariatric patients with cirrhosis from four centers in China between 2016 and 2023 was conducted,with follow-up for one year after *** primary outcome was the safety of Bs in patients with unexpected cirrhosis,while the secondary outcome was the metabolic efficacy of Bs in this group *** A total of 47 patients met the study criteria,including 46 cases of Child-Pugh class A cirrhosis and 1 case of Child-Pugh *** examination confirmed nodular cirrhosis in 21 patients(44.68%),pseudolobule formation in 1 patient(2.13%),lipedema degeneration with inflammatory cell infiltration in 3 patients(6.38%),and chronic hepatitis in 1 patient(2.13%).The average percentage of total weight loss was 29.73±6.53%at one year *** the 30-day postoperative period,the complication rate was 6.38%,which included portal vein thrombosis,gastrointestinal bleeding,and intra-abdominal ***,no cases of liver decompensation or mortality were reported during the follow-up *** remission rates of comorbidities among 41 patients one year after surgery were as follows:dyslipidemia 100%,type 2 diabetes 82.61%,hypertension 84.62%,and obstructive sleep apnea syndrome 85.71%.Conclusions Bs can be safely performed in patients with unexpected cirrhosis in the compensated stage of liver disease,with low postoperative morbidity and no mortality observed during one-year follow-up.

关键词： Bariatric surgery(Bs) Metabolic surgery Liver cirrhosis Obesity Type 2 diabetes mellitus(T2M)

腹腔镜袖状胃切除术后的胃壁厚度测量及其影响因素分析

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国普外基础与临床杂志 2024年第9期31卷 1093-1098页

作者：袁培文洪健王辉 fidele Kakule Kitaghenda 孙霞姚立彬朱孝成徐州医科大学研究生院江苏徐州221004 徐州医科大学附属医院减重代谢外科江苏徐州221002

目的测量肥胖患者的胃壁厚度并探讨它与患者临床病理特征的关系。方法收集2023年2–8月期间在徐州医科大学附属医院接受腹腔镜袖状胃切除术(laparoscopic sleeve gastrectomy,LsG)患者的临床病理资料。使用组织测量装置在8 g/mm^(2)的... 详细信息

目的测量肥胖患者的胃壁厚度并探讨它与患者临床病理特征的关系。方法收集2023年2–8月期间在徐州医科大学附属医院接受腹腔镜袖状胃切除术(laparoscopic sleeve gastrectomy,LsG)患者的临床病理资料。使用组织测量装置在8 g/mm^(2)的压缩压力下于3个预定位置(胃窦、胃体和胃底)测量LsG术后切除的胃组织标本的胃壁厚度,采用多重线性回归分析影响胃壁厚度的因素。结果本研究共收集到符合研究条件的232例患者,男49例,女183例;术前身体质量指数(body mass index,BMI)为28.2~61.8 kg/m^(2)、(38.4±5.3)kg/m^(2),BMI≥40 kg/m^(2)者82例、sG术中针对男性和BMI更高的肥胖患在不同的切缘线解剖位置选择钉仓的大小和高度不同。

关键词：腹腔镜袖状胃切除术胃壁厚度

Relationship between Inter Canine Width and Inter Alar Width, Inter Commissural Width, and Inter Canthal Distance: A Pilot study

在线全文

学校读者我要写书评

暂无评论

Open Journal of stomatology 2024年第6期14卷 279-290页

作者： Grevisse Bindele Ndombolo Augustin Mantshumba Milolo fidele Nyimi Bushabu Em Kalala Kazadi Pierrot Kumpanya Ntumba Jean Marie Kayembe Bukama Elias Lubadi Tshilumba Jean Paul sekele Isouradi Department of Prosthodontics Teaching Hospital of Kinshasa University Kinshasa Democratic Republic of the Congo National Center of Research in Dental sciences Kinshasa Democratic Republic of the Congo Department of Oral and Maxillofacial surgery Teaching Hospital of Kinshasa University Kinshasa Democratic Republic of the Congo Department of Periodontology Teaching Hospital of Kinshasa University Kinshasa Democratic Republic of the Congo Department of Operative Dentistry Teaching Hospital of Kinshasa University Kinshasa Democratic Republic of the Congo

The aim of this study was to determine the relationship between inter canine width (ICW) and inter alar width (IAW), inter commissural width (ICoW), and inter canthal distance (ICaD) in Bantu population. Materials and Methods: It was a pilot study included all participants who were aged at least 18 years, without a history of orthodontics treatment from Prosthodontics Department, Faculty of Dental Medicine, University of Kinshasa. The Ethics committee of the National Center of Research for Dental sciences in DR Congo approved the study protocol (CNRsB 1504.218). The participants medical records were obtained from the interview and dental examination. Nature of the study was explained with participant information sheet, and an informed consent of all participants was obtained. The inclusion criteria were no missing maxillary and mandibular teeth, no diastema, and no anterior restorations, 18 years old before enrollment in the study. The exclusion criteria were inability to meet the above requirements, pregnancy, and refusal to participate in the study. The inter-canine width (ICW), inter alar width (IAW), inter canthal distance (ICaD) and inter-commissural width (ICoW) of each participant were measured with a digital Vernier caliper (Mitutoyo, UK Ltd.,) (0.01 mm) three times and the average value was recorded. The inter canthal distance (ICaD) was measured without applying pressure by bringing the recording parts of the caliper just in contact with the medial angle. The inter alar width (IAW) was marked with a fine marked pencil on the widest outer surface of the alae of the nose on either side or width. Those two points were measured without applying pressure by bringing the recording parts of the caliper just in contact with the outer surface. The participant was told to stop breathing shortly to avoid any change in shape of the nose. The inter-commissural width (ICoW) was determined by measuring the maxillary lip vermilion from commissure to commissure without the

关键词： Relationship Inter-Canine Width Inter Alar Width Inter Canthal Distance Inter Commissural Width

Effect of Eu3+,Bi3+,and Li+ doping on luminescent property of GdNbO4

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 Rare Earths 2024年第1期42卷 66-75页

作者： s.W.Wi Y.s.Lee Department of Physics and Integrative Institute of Basic sciences Soongsil University

We investigated the emission properties of Eu3+-doped GdNbO4-based oxide phosphors,aiming at improving the Eu3+emission by codoping of Bi3+and Li+.Eu3+singly doped,Eu3+and Bi3+doubly doped,and Eu3+,Bi3+,and Li+triply doped GdNbO4were prepared using a high-temperature solid-state reaction *** red-orange emissions from Eu3+in the singly doped samples are significantly improved by the codoping of Bi3+,mainly due to the energy transfer from Bi3+to Eu3+.The additional codoping of Li+is found to increase the Eu3+emission *** improvement might be attributed to the increase in the photoluminescent quantum yield originating from larger grain sizes and better crystallinity.A detailed analysis of the X-ray diffraction pattern and the asymmetric ratio estimated from the photoluminescence spectra show that the local lattice environment around Eu3+in GdNbO4does not change significantly with the codoping of Bi3+and Li+.Our results indicate that Li+doping is a promising way to improve the emission properties of rare-earth ion-doped GdNbO4phosphors.

关键词： Eu 3+ GdNbO 4 Codoping of Li + Photoluminescence sensitizer Rare earths

First evidence for chiral wobbling of triaxial nuclei

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Nuclear science and Techniques 2024年第7期35卷 4-7页

作者： s.Frauendorf Department of Physics and Astronomy University of Notre DameNotre DameIN 46556USA

Chirality(Greek“handiness”)is a property of many com-plex *** molecules exist in two forms,one being the mirror image of the *** for our hands,it is impossible to make the images identical by a suitable *** two forms are called left-handed and *** have the same binding energy,because the electro-magnetic interaction,which holds the molecule together,does not change under a *** properties that are insensitive to the geometry are also the *** different geometry is the reason why the left-handed form turns the polarization plane of transmitted light in one direction by some angle while the right-handed form turns it in the oppo-site direction by the same ***,the geometrical differences between the two species may have other *** two species of the carvon molecule shown in Fig.1 taste quite differently.

关键词： turns Chiral mirror

Tribological behavior of lubricant-impregnated porous polyimide

在线全文

学校读者我要写书评

暂无评论

Friction 2024年第4期12卷 711-725页

作者： Jinbang LI Ningning ZHOU Janet s.s.WONG school of Mechanical Engineering and Mechanics Ningbo UniversityNingbo 315211China Beijing Key Laboratory of Long-life Technology of Precise Rotation and Transmission Mechanisms Beijing Institute of Control EngineeringBeijing 100029China Department of Mechanical Engineering Imperial College LondonLondon SW72AZUK

Porous materials impregnated with lubricants can be used in conditions where limited lubricant is *** this work,three porous polyimides(PPI)with different densities were ***(PAO)impregnated PPI(iPPI)discs were rubbed against steel and sapphire *** operando observations of the iPPI-sapphire contacts show that oil is released under an applied load,forming a meniscus around *** at the outlet is created at high sliding *** amount of released oil increases with increasing PPI *** moduli,E*,estimated based on the actual contact size show that trapped oil in iPPIs contributes to load *** higher speeds,tribological rehydration of the contact occurs in low density iPPI,with that E*rises with *** high density PPIs,high speeds give a constantly high E*which is limited by the viscoelastic properties of the PPI network and possibly the rate of oil *** of iPPI-steel contacts is governed by the mechanical properties of the PPI,the flow of the lubricant,and the roughness of the PPI *** low-and medium-density(highly porous,high roughness)PPIs,large amount of oil is released,and lubrication is mainly via lubricant restricted in the contact in the pores and possibly tribological *** high density(low porosity)PPI,with lower roughness,hydrodynamic lubrication is achieved which gives the lowest *** results show that polymeric porous materials for effective lubrication require the optimization of its surface roughness,stiffness,oil flow,and oil retentions.

关键词： polyimide porous material friction mechanism polymer limited lubrication

Enhancing fatigue performance of AZ31 magnesium alloy components fabricated by cold metal transfer-based wire arc directed energy deposition through LPB

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 Magnesium and Alloys 2024年第4期12卷 1638-1662页

作者： shambhu Kumar Manjhi srikanth Bontha A.s.s.Balan Department of Mechanical Engineering National Institute of Technology KarnatakaSurathkalSrinivasanagarMangaloreKarnataka 575025India

Cold Metal Transfer-Based Wire Arc Directed Energy Deposition(CMT-WA-DED)presents a promising avenue for the rapid fabrication of components crucial to automotive,shipbuilding,and aerospace ***,the susceptibility to fatigue of CMT-WA-DED-produced AZ31 Mg alloy components has impeded their widespread adoption for critical load-bearing *** this study,a comprehensive investigation into the fatigue behaviour of WA-DED-fabricated AZ31 Mg alloy has been carried out and compared to commercially available wrought AZ31 *** findings indicate that the as-deposited parts exhibit a lower fatigue life than wrought Mg alloy,primarily due to poor surface finish,tensile residual stress,porosity,and coarse grain microstructure inherent in the WA-DED *** Plasticity Burnishing(LPB)treatment is applied to mitigate these issues,which induce significant plastic deformation on the *** treatment resulted in a remarkable improvement of fatigue life by 42%,accompanied by a reduction in surface roughness,grain refinement and enhancement of compressive residual stress ***,during cyclic deformation,WA-DED specimens exhibited higher plasticity and dislocation density compared to both wrought and WA-DED+LPB specimens.A higher fraction of Low Angle Grain Boundaries(LAGBs)in WA-DED specimens contributed to multiple crack initiation sites and convoluted crack paths,ultimately leading to premature *** contrast,wrought and WA-DED+LPB specimens displayed a higher percentage of High Angle Grain Boundaries(HAGBs),which hindered dislocation movement and resulted in fewer crack initiation sites and less complex crack paths,thereby extending fatigue *** findings underscore the effectiveness of LPB as a post-processing technique to enhance the fatigue performance of WA-DED-fabricated AZ31 Mg alloy *** study highlights the importance of LPB surface treatment on AZ31 Mg components produced by CMT-WA-DED to remove surface d

关键词： Wire arc additive manufacturing AZ31 Mg alloy Low plasticity burnishing Low cycle fatigue test strain amplitude

Ren-integrable and ren-symmetric integrable systems

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2024年第3期76卷 62-69页

作者： s Y Lou school of Physical science and Technology Ningbo UniversityNingbo315211China

A new type of symmetry,ren-symmetry,describing anyon physics and corresponding topological physics,is ***-symmetry is a generalization of super-symmetry which is widely applied in super-symmetric physics such as super-symmetric quantum mechanics,super-symmetric gravity,super-symmetric string theory,super-symmetric integrable systems and so *** and Grassmann numbers are,in some sense,dual conceptions,and it turns out that these conceptions coincide for the ren situation,that is,a similar conception of ren-number(R-number)is devised for *** particular,some basic results of the R-number and ren-symmetry are exposed which allow one to derive,in principle,some new types of integrable systems including ren-integrable models and ren-symmetric integrable *** examples of ren-integrable KdV-type systems and ren-symmetric KdV equations are explicitly given.

关键词： symmetries integrable systems anyon physics extended supersymmetry ren-symmetry

AutoRhythmAI: A Hybrid Machine and Deep Learning Approach for Automated Diagnosis of Arrhythmias

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2024年第2期78卷 2137-2158页

作者： s.Jayanthi s.Prasanna Devi Department of Computer science and Engineering SRM Institute of Science and Technology-Vadapalani CampusChennaiTamil NaduIndia

In healthcare,the persistent challenge of arrhythmias,a leading cause of global mortality,has sparked extensive research into the automation of detection using machine learning(ML)***,traditional ML and AutoML approaches have revealed their limitations,notably regarding feature generalization and automation *** glaring research gap has motivated the development of AutoRhythmAI,an innovative solution that integrates both machine and deep learning to revolutionize the diagnosis of *** approach encompasses two distinct pipelines tailored for binary-class and multi-class arrhythmia detection,effectively bridging the gap between data preprocessing and model *** validate our system,we have rigorously tested AutoRhythmAI using a multimodal dataset,surpassing the accuracy achieved using a single dataset and underscoring the robustness of our *** the first pipeline,we employ signal filtering and ML algorithms for preprocessing,followed by data balancing and split for *** second pipeline is dedicated to feature extraction and classification,utilizing deep learning ***,we introduce the‘RRI-convoluted trans-former model’as a novel addition for binary-class *** ensemble-based approach then amalgamates all models,considering their respective weights,resulting in an optimal model *** our study,the VGGRes Model achieved impressive results in multi-class arrhythmia detection,with an accuracy of 97.39%and firm performance in precision(82.13%),recall(31.91%),and F1-score(82.61%).In the binary-class task,the proposed model achieved an outstanding accuracy of 96.60%.These results highlight the effectiveness of our approach in improving arrhythmia detection,with notably high accuracy and well-balanced performance metrics.

关键词： Automated machine learning neural networks deep learning arrhythmias