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“城市矿产”资源产生及其供给潜力:以金属铌为例

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中国科学：地球科学 2024年第8期54卷 2625-2632页

作者：曾现来 Moisés GÓMEZ mahmoud BAKRY 耿涌李金惠清华大学环境学院北京100084 上海交通大学环境科学与工程学院上海200240 上海交通大学国际与公共事务学院上海200030

“碳中和”战略正在重塑全球资源流动和循环利用的格局,迅速增长的“城市矿产”(也称为二次资源)作为地质矿产的延伸,在资源供给和平衡方面发挥着越来越重要的作用.铌是一种关键金属,但目前缺乏对其可持续性的研究.循环利用的基本原则... 详细信息

“碳中和”战略正在重塑全球资源流动和循环利用的格局,迅速增长的“城市矿产”(也称为二次资源)作为地质矿产的延伸,在资源供给和平衡方面发挥着越来越重要的作用.铌是一种关键金属,但目前缺乏对其可持续性的研究.循环利用的基本原则是尽可能的在其全生命周期过程中高效利用该金属,对此,我们评估了含铌材料在报废过程中的损耗,揭示了最大限度减少此类损耗的必要性,阐明了全生命周期中含“城市矿产”和合金的利用过程.根据对大多数铌应用产生的“城市矿产”预测,如果不进行回收利用,到2090年可能会损失16.8万吨.相反,如果金属铌的回收利用率增至90%,预计其损失将减少到1.6万吨.因此,需要探索各种措施,以实现从线性经济到循环经济的无缝过渡,促进铌资源的可持续利用.

关键词：铌 “城市矿产” 循环经济回收利用可持续性

Bio-f.rtilizer Improved Oil Palm Seedling Growth

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American Journal of.Plant Sciences 2024年第7期15卷 455-466页

作者： Gabriel Ddamulira f. Masika A. Asiimwe L. Zubairi M. Otuba Horticulture & Oil Palm Program National Crops Resources Research Institute Kampala Uganda

In most f.rming systems newly introduced commercial f.rtilizers to be accepted, adopted and used by f.rmers, their ef.ectiveness and appropriate application rates must be exhibited. This study was conducted to validate the ef.ect and rates of.a bio-f.rtilizer (super agric) on oil palm seedling growth. The trial was laid out in a randomized complete block design (RCBD) with three application rates of.0, 4 and 8 ml/L of.water (treatments) replicated thrice. f.llowing the application of.super agric to oil palm seedlings f.r a period of.six months, observations drawn f.om the analysis of.growth data were as f.llows: Three months af.er treatment, super agric signif.cantly (P f.oil palm seedling compared to those which were not applied with super agric. The results also showed that when super agric was applied at a rate of.4 ml/L, the leaf.length and breadth were higher compared to the control were super agric was not used. f.rthermore, applications of.super agric improved oil palm seedling nitrogen uptake by 31% in treatment groups as compared to the control which explained the height and breadth increase in the oil palm seedlings that were applied with super agric. On the other hand, the ef.ect of.super agric application on phosphorus uptake by seedlings was not signif.cant. Although the height, breadth, leaf.width and length were all signif.cantly af.ected by super agric application, the number of.oil palm leaves and spears were not af.ected f.r the period the experiment was conducted. Six months af.er application of.super agric the growth of.oil palm seedlings was f.vorably impacted, hence we recommend super agric to be promoted among oil palm seedling growers.

关键词： Bio-f.rtilizer Seedling Growth Application Rates Super Agric

Linking IL-10 signaling with lipid metabolic programs in macrophages:dysregulated ceramide homeostasis drives colitis

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Signal Transduction and Targeted Therapy 2024年第7期9卷 2835-2836页

作者： Imke Atreya Markus f.Neurath Department of.Medicine 1 University Hospital of ErlangenFriedrich-Alexander University Erlangen-NürnbergErlangenGermany Deutsches Zentrum Immuntherapie(DZI) ErlangenGermany

In a recent study published in Nature,York and coworkers identif.ed the immunometabolic regulation of.mono-unsaturated f.tty acid(MUf.)pools and the subsequent increase in sphingolipid biosynthesis in TLR2-activated macrophages as an important link between impaired IL-10 signaling and the development of.intestinal inf.ammation.1 Thus,targeted interf.rence with the newly identif.ed IL-10/MUf./sphingolipid axis appears as a promising strategy to restore immunometabolic homeostasis in the intestine of.patients with inf.ammatory bowel diseases(IBD).

关键词： homeostasis impaired intestine

A Rare Case of.Aortic Valve Endocarditis and Acute Meningitis Due to Haemophilus inf.uenzae

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Case Reports in Clinical Medicine 2024年第6期13卷 207-211页

作者： Zachary M. Visinoni Justin D. Tse Christopher f. Pease Department of.Graduate Medical Education Internal Medicine Residency Sutter Roseville Medical Center Roseville USA Sutter Medical Group Roseville USA

HACEK organisms represent a rare but important group of.causative pathogens in endocarditis. These bacteria have historically been associated with culture-negative endocarditis;however, modern laboratory techniques have made this less common. In this case, we present a 74-year-old man who presented with acute onset altered mentation, f.ver, and sepsis. He was ultimately f.und to have Haemophilus inf.uenzae meningitis, cerebral empyema, aortic valve endocarditis, psoas myositis, and L2 - L3 diskitis with osteomyelitis. Although HACEK organisms are commonly f.und in the oropharynx and upper respiratory tract in humans, our patient did not report recent preceding dental or ENT procedures. H. inf.uenzae is responsible f.r approximately 0.16% of.all cases of.bacterial endocarditis, representing a very limited subset. Although generally considered low virulent pathogens, this case demonstrates the unusual extent of.inf.ction f.om a HACEK organism, H. inf.uenzae, causing aortic valve endocarditis as well as atypical non-cardiac sequelae, including acute meningitis.

关键词： HACEK Haemophilus inf.uenzae Aortic Valve Endocarditis Bacterial Meningitis Cerebral Empyema

Engineering and Physical Bases of.Development and Creation of.Plasmochemical Reactors f.r Mobile f.cilities f.r Medical Waste Disposal

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Open Journal of.Ecology 2024年第9期14卷 651-662页

作者： Volodymyr Vashchenko Iryna Korduba Nancy mahmoud Al Saeed Haf.z Nazarii Nehoda Serhii Tsybytovskyi Center f.r f.ndamental Research in Energy and Ecology of.the National Academy of.Sciences of.Ukraine Odesa Polytechnic and the Ministry of Ecology of Ukraine Odesa Ukraine Department of.Environmental Protection Technologies and Labor Protection Kyiv National University of Construction and Architecture Kyiv Ukraine Department of.Ecology National Aviation University Kyiv Ukraine

This paper presents the results of.the development and creation of.plasma-chemical reactors f.r mobile and stationary installations f.r the destruction and disposal of.solid, liquid, gaseous and mixed medical waste based on the domestic plasma generator PUN-1, with air as the plasma-f.rming gas. The design and principle of.operation of.plasma-chemical reactors installed on mobile experimental and industrial plants “Plazmon-1,2,3”, as well as the main f.atures of.the plasma waste disposal process are described.

关键词： Medical Waste Incineration Plasma Chemical Reactor Plasma Generator Mobile Installations

Parameter-f.ee Shif.ed Laplacian Reconstruction f.r Multiple Kernel Clustering

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IEEE/CAA Journal of.Automatica Sinica 2024年第4期11卷 1072-1074页

作者： Xi Wu Zhenwen Ren f.Richard Yu the School of.National Def.nce Science and Technology Southwest University of Science and TechnologyMianyang 621010China the School of.National Def.nce Science and Technology Southwest University of Science and TechnologyMianyang 621010 the Guangxi Key Laboratory of.Machine Vision and Intelligent Control Wuzhou UniversityWuzhou 543002 the Guangdong Laboratory of.Artif.cial Intelligence and Digital Economy(SZ) Shenzhen 518060China

Dear Editor,This letter proposes a parameter-f.ee multiple kernel clustering(MKC)method by using shif.ed Laplacian *** MKC can ef.ectively cluster nonlinear data,but it f.ces two main challenges:1)As an unsupervised method,it is up against parameter problems which makes the parameters intractable to tune and is unf.asible in real-lif. applications;2)Only considers the clustering inf.rmation,but ignores the interf.rence of.noise within Laplacian.

关键词： parameter letter Parameter

Inf.ow and outf.ow permeability tests in a very sof. clay under low stresses

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Journal of.Rock Mechanics and Geotechnical Engineering 2024年第8期16卷 3270-3283页

作者： J.W.S.Vargas f.A.B.Danziger f.R.Lopes T.Lunne f.deral University of.Rio de Janeiro Rio de JaneiroBrazil Norwegian Geotechnical Institute OsloNorway

In situ inf.ow and outf.ow permeability tests with the BAT probe at SarapuíII sof. clay test site are presented.A description of.the BAT permeability test is provided,discussing its advantages and shortcomings,especially in the case of.very sof. clays under low *** pressures were monitored during probe installation and were f.und to be slightly lower than piezocone u2 pore pressures,consistent with the position of.the *** role of.f.lter tip saturation was investigated af.er the usual saturation procedure provided an unsatisf.ctory pore pressure response during probe *** show that the vacuum saturation procedure provides adequate response during installation and increases the reliability of.the coef.icient of.permeability determination in early *** inf.ow and outf.ow tests yielded similar results,indicating that caref.l execution of.the test can lead to good test repeatability regardless of.the loading *** sequences of.alternated inf.ow and outf.ow tests have yielded similar results,indicating that soil reconsolidation and f.lter clogging were negligible in the tests *** are presented concerning the relationship between index parameters and the in situ coef.icient of.permeability f.r SarapuíII clay,which plot outside the range of.existing databases.

关键词： Permeability test Sof. clay BAT probe Inf.ow and outf.ow tests

Python Server Page Perf.rmance Analysis and Modeling

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Communications and Network 2024年第1期16卷 1-30页

作者： Razaf.ndraibe Marolahy Alix Randrianomenjanahary Lala f.rdinand Raf.mantanantsoa f.ntaine Mahatody Thomas f. Angelo Raherinirina University of.f.anarantsoa Fianarantsoa Madagascar

Today, in the f.eld of.computer networks, new services have been developed on the Internet or intranets, including the mail server, database management, sounds, videos and the web server itself.Apache. The number of.solutions f.r this server is theref.re growing continuously, these services are becoming more and more complex and expensive, without being able to f.lf.ll the needs of.the users. The absence of.benchmarks f.r websites with dynamic content is the major obstacle to research in this area. These users place high demands on the speed of.access to inf.rmation on the Internet. This is why the perf.rmance of.the web server is critically important. Several f.ctors inf.uence perf.rmance, such as server execution speed, network saturation on the internet or intranet, increased response time, and throughputs. By measuring these f.ctors, we propose a perf.rmance evaluation strategy f.r servers that allows us to determine the actual perf.rmance of.dif.erent servers in terms of.user satisf.ction. f.rthermore, we identif.ed perf.rmance characteristics such as throughput, resource utilization, and response time of.a system through measurement and modeling by simulation. f.nally, we present a simple queue model of.an Apache web server, which reasonably represents the behavior of.a saturated web server using the Simulink model in Matlab (Matrix Laboratory) and also incorporates sporadic incoming traf.ic. We obtain server perf.rmance metrics such as average response time and throughput through simulations. Compared to other models, our model is conceptually straightf.rward. The model has been validated through measurements and simulations during the tests that we conducted.

关键词： Perf.rmance Analysis Queue Perf.rmance Model Web Server Internet World Wide Web Web Server Perf.rmance

Advancing Crowd Object Detection: A Review of.YOLO, CNN and ViTs Hybrid Approach*

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Journal of.Intelligent Learning Systems and Applications 2024年第3期16卷 175-221页

作者： mahmoud Atta Mohammed Ali Tarek Aly Atef.Tayh Raslan Mervat Gheith Essam A. Amin f.culty of.Graduate Studies f.r Statistical Research Software Engineering Department Cairo University Giza Egypt

One of.the most basic and dif.icult areas of.computer vision and image understanding applications is still object detection. Deep neural network models and enhanced object representation have led to signif.cant progress in object detection. This research investigates in greater detail how object detection has changed in the recent years in the deep learning age. We provide an overview of.the literature on a range of.cutting-edge object identif.cation algorithms and the theoretical underpinnings of.these techniques. Deep learning technologies are contributing to substantial innovations in the f.eld of.object detection. While Convolutional Neural Networks (CNN) have laid a solid f.undation, new models such as You Only Look Once (YOLO) and Vision Transf.rmers (ViTs) have expanded the possibilities even f.rther by providing high accuracy and f.st detection in a variety of.settings. Even with these developments, integrating CNN, YOLO and ViTs, into a coherent f.amework still poses challenges with juggling computing demand, speed, and accuracy especially in dynamic contexts. Real-time processing in applications like surveillance and autonomous driving necessitates improvements that take use of.each model type’s advantages. The goal of.this work is to provide an object detection system that maximizes detection speed and accuracy while decreasing processing requirements by integrating YOLO, CNN, and ViTs. Improving real-time detection perf.rmance in changing weather and light exposure circumstances, as well as detecting small or partially obscured objects in crowded cities, are among the goals. We provide a hybrid architecture which leverages CNN f.r robust f.ature extraction, YOLO f.r rapid detection, and ViTs f.r remarkable global context capture via self.attention techniques. Using an innovative training regimen that prioritizes f.exible learning rates and data augmentation procedures, the model is trained on an extensive dataset of.urban settings. Compared to solo YOLO,

关键词： Object Detection Deep Learning Computer Vision YOLO Convolutional Neural Networks (CNN) Vision Transf.rmers Neural Networks Transf.r Learning Autonomous Driving Self.Drive Vehicles