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Ballistic design and testing of a composite armour reinforced by CNTs suitable for armoured vehicles

defence Technology（防务技术） 2024年第2期32卷 173-195页

作者： Evangelos Ch.Tsirogiannis Evangelos daskalakis mohamed H.Hassan Abdalla m.Omar Paulo Bartolo EOdH sa Research and Development DepartmentLakkoma Chalkidikis63080Greece School of mechanical Aerospace and Civil EngineeringUniversity of ManchesterManchesterM139PLUK Singapore Centre for 3d Printing School of Mechanical and Aerospace EngineeringNanyang Technological University639798Singapore

This paper is investigating the use of composite armour reinforced by nanomaterials, for the protection of light armoured(LAV) and medium armoured military vehicles(mAV), and the interaction between the composite materials and high-performance ballistic projectiles. Four armour materials, consisted of front hybrid fibre reinforced polymer cover layer, ceramic strike-face, fibre reinforced polymer intermediate layer and the metal matrix composite reinforced backplate, were manufactured and assembled by adhesive technology. The proposed laminated protection system is suitable for armoured ground vehicles;however, it could be used as armour on ground, air and naval platforms. The design of the protection system, including material selection and thickness, was elaborated depending on the performance requirements of Level 4 + STANAG 4569 military standard(projectile 14.5 mm × 114 mm API B32) and especially on a design philosophy which is analysed with the specifications. The backplate of this new composite is a hybrid material of metal matrix Composite(mmC) reinforced with carbon nanotubes(CNTs), manufactured with the use of powder metallurgy technique. The composite backplate material was morphologically, mechanically and chemically analysed. Results show that all plates are presenting high mechanical properties and ballistic characteristics, compared to commonly used armour plates. Real military ballistic tests according to AEP-STANAG 4569 were carried out for the total composite armour systems. After the ballistic tests, AA2024-CNT3 showed the best protection results, compared with the other plates(AA2024-CNT1 and AA2024-CNT2), with the projectile being unable to fully penetrate the composite plate.

关键词： Passive armour protection Protective armour Ballistic performance Hybrid composites Vehicle protection

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Coprophilous contributions to the phylogeny of Lasiosphaeriaceae and allied taxa within Sordariales(Ascomycota,Fungi)

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Fungal diversity 2015年第1期70卷 101-113页

作者： Åsa Kruys sabine m.Huhndorf Andrew N.miller Systematic Biology Department of Organismal BiologyEvolutionary Biology CentreUppsala UniversityNorbyvägen 18DSE-75236 UppsalaSweden Botany department Field MuseumChicagoIL 60605USA Illinois Natural History Survey University of IllinoisChampaignIL 61820US

The phylogenetic relationships of Lasiosphaeriaceae are complicated in that the family is paraphyletic and includes Sordariaceae and Chaetomiaceae,as well as several polyphyletic *** study focuses on the phylogenetic relationships of the coprophilous genera,Anopodium,Apodospora,Arnium,Fimetariella and *** are traditionally circumscribed based on ascospore characters,which have proven homoplasious in other genera within the *** results based on LSU nrdNA andß–tubulin sequences distinguish four lineages of Lasiosphaeriaceae *** joins the clade of mor-phologically similar,yellow-pigmented species of Cercophora and *** is monophyletic and joins a larger group of taxa with unclear affinities to each other,while Arnium is polyphyletic being scattered throughout three of the four major clades of *** is represented by a single collection and joins the clade containing Cercophora scortea and Podospora *** shows affinities to the Lasiosphaeris *** on a combination of morphological and molecular data,Echria *** recognized at the genus level for the former Arnium section and two new combinations are proposed:*** and ***.

关键词： Ascomal wall Ascomycete β-tubulin LSU nrdNA Systematics,Taxonom

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salinity distribution at Canal Istanbul and Its Possible Impacts on the Northern marmara Sea

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China Ocean Engineering 2020年第6期34卷 881-888页

作者： Şehriban saÇU Tarkan ERdIK OlgayŞEN Istanbul Technical University MaslakIstanbul 34467Turkey

Turkey has announced its plan to construct a new waterway, Canal Istanbul, parallel to the Bosphorus. In this study,the influence of Canal Istanbul on salinity distribution in the northern marmara Sea is investigated using a previously calibrated 3 d hydrodynamic and salinity model. moreover, the salinity field of the canal and its propagation are examined based on various meteorological cases. Finally, the flow structure of the canal is determined. It is calculated that at the southern end of the canal, mainly unidirectional flow(from the Black Sea to the marmara Sea)occurs during 68% of the simulation period. A two-layer flow is seen only 28% of the time with a weak lower layer flow, whereas this value decreases to 4% at the north end of the canal. In the southward direction(to the marmara Sea), velocities higher than 1.5 m/s are rarely observed along the canal. The average surface salinity difference in the northern marmara Sea due to the construction of the canal is calculated to be smaller than 0.50 ppt. The salinity difference gradually diminishes as water depth increases and after 25 m(from the surface) almost no difference is observed.

关键词： Canal Istanbul marmara Sea salinity distribution hydrodynamic modeling

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Exact solutions for magnetohydrodynamic nanofluids flow and heat transfer over a permeable axisymmetric radially stretching/shrinking sheet

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Chinese Physics B 2024年第2期33卷 108-114页

作者： U.S.mahabaleshwar G.P.Vanitha L.m.Pérez Emad H.Aly I.Pop department of Studies in mathematics Davangere UniversityShivagangothriDavangereIndia departamento de F´ısica FACIUniversidad de Tarapac´aCasilla 7DAricaChile department of mathematics Faculty of EducationAin Shams UniversityRoxyCairoEgypt department of mathematics Babes-Bolyai University400084 Cluj-NapocaRomania

We report on the magnetohydrodynamic impact on the axisymmetric flow of Al_(2)O_(3)/Cu nanoparticles suspended in H_(2)O past a stretched/shrinked *** the use of partial differential equations and the corresponding thermophysical characteristics of nanoparticles,the physical flow process is *** resultant nonlinear system of partial differential equations is converted into a system of ordinary differential equations using the suitable similarity *** transformed differential equations are solved *** of the magnetic parameter,solid volume fraction and stretching/shrinking parameter on momentum and temperature distribution have been analyzed and interpreted *** skin friction and Nusselt number were also *** addition,existence of dual solution was deduced for the shrinking sheet and unique solution for the stretching ***,Al_(2)O_(3)/H_(2)O nanofluid flow has better thermal conductivity on comparing with Cu/H_(2)O ***,it was found that the first solutions of the stream are stable and physically realizable,whereas those of the second ones are unstable.

关键词： magnetohydrodynamic nanofluid stretching/shrinking sheet axisymmetric flow analytical solution suction/injection

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多年冻土区静钻根植桩回冻过程温度场研究

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石家庄铁道大学学报（自然科学版） 2024年第1期37卷 100-106页

作者：詹钦鹏王彪王飒石家庄铁道大学土木工程学院河北石家庄050043

基于传热学理论,给出桩土温度场偏微分方程及边界条件,结合低温稳定多年冻土区地质背景,通过有限元数值分析求解,分析静钻根植桩回冻过程桩土温度场随时间的分布变化规律,讨论水泥掺入量及水泥土的水泥浆体初始拌入温度对回冻过程的影响... 详细信息

基于传热学理论,给出桩土温度场偏微分方程及边界条件,结合低温稳定多年冻土区地质背景,通过有限元数值分析求解,分析静钻根植桩回冻过程桩土温度场随时间的分布变化规律,讨论水泥掺入量及水泥土的水泥浆体初始拌入温度对回冻过程的影响.结果表明,地表下2m以内桩土温度受大气温度影响较明显,水化热对1.5倍桩径以外及桩底1~2m以下范围桩土温度影响甚微,17 d后桩侧温度回冻至0℃,27d桩侧温度降至-0.5℃以下;水泥浆体初始拌入温度每升高5℃,回冻时间增长5~6 d;水泥掺入量每减少10%,回冻时间缩短1~2 d.静钻根植桩的温度场同样受水化热影响,但回冻时间较短;通过调整水泥浆体配合比和降低水泥浆体初始拌入温度可兼顾水泥土强度和回冻时间要求,达到提高承载力、缩短施工工期的目的.

关键词：多年冻土静钻根植桩水化热水泥掺入量初始拌入温度

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24.6%噻虫嗪·叶菌唑·嘧菌酯种子处理悬浮剂制备及其安全性研究

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东北农业大学学报 2024年第4期55卷 1-12页

作者：彭程杨璐董飒冯建国石伟山袁树忠扬州大学植物保护学院江苏扬州225000 江苏艾津作物科技集团有限公司南京211500

种子处理悬浮剂可从源头上防治病虫害,降低防治成本,减少环境污染。为获得有效防治小麦和水稻主要病虫害的种子处理悬浮剂,通过筛选润湿分散剂、成膜剂和增稠剂等助剂,确定24.6%噻虫嗪·叶菌唑·嘧菌酯种子处理悬浮剂(FS)优化配方,测试... 详细信息

种子处理悬浮剂可从源头上防治病虫害,降低防治成本,减少环境污染。为获得有效防治小麦和水稻主要病虫害的种子处理悬浮剂,通过筛选润湿分散剂、成膜剂和增稠剂等助剂,确定24.6%噻虫嗪·叶菌唑·嘧菌酯种子处理悬浮剂(FS)优化配方,测试其安全性和生物活性。结果表明,24.6%噻虫嗪·叶菌唑·嘧菌酯FS优化配方为18.2%噻虫嗪、3.2%叶菌唑、3.2%嘧菌酯、2%聚羧酸盐类分散剂GEROPON dA13491、2%聚芳醚硫酸酯铵类分散剂Fd530、0.3%黄原胶、0.5%硅酸镁铝、4%丙烯酸乳液n8、8%的8#红、0.2%苯甲酸、4%乙二醇、0.5%有机硅消泡剂BG08、去离子水补足至100%。该种子处理悬浮剂粒径(d_(90))为1.72μm,成膜性良好,脱落率小于5%,各项质量指标均符合种子处理悬浮剂企业标准。在发芽试验中,包衣后小麦和水稻种子发芽率分别达到95.67%和88.67%;在盆栽试验中,包衣后小麦和水稻种子出苗率分别为85.33%和91.33%,表明制备的种子处理悬浮剂对小麦和水稻种子安全。在此剂量下,药剂苗后30、90 d对小麦蚜虫相对防治效果分别达到32.82%、93.51%,对小麦纹枯病相对防治效果达到70.50%、34.63%;在苗后30、60 d对水稻飞虱相对防治效果达到21.44%、26.78%,对水稻稻瘟病相对防治效果达到54.99%、67.06%,表明制备的种子处理悬浮剂可防治上述小麦和水稻病虫害。

关键词：噻虫嗪叶菌唑嘧菌酯种子处理悬浮剂配方

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血铅水平降低对血压水平降低的影响:强心家族研究的纵向证据

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中华高血压杂志（中英文） 2024年第2期32卷 190-190页

作者：袁源(译) 郑武洪(审校) 不详

慢性铅暴露与临床及亚临床心血管疾病相关。本研究旨在评估强心家族研究(strong heart family study,SHFS)中的成年美洲印第安人参与者血铅水平降低是否与收缩压及舒张压变化相关。方法和结果:在1997—1999年和2006—2009年检测SHFS的28... 详细信息

慢性铅暴露与临床及亚临床心血管疾病相关。本研究旨在评估强心家族研究(strong heart family study,SHFS)中的成年美洲印第安人参与者血铅水平降低是否与收缩压及舒张压变化相关。方法和结果:在1997—1999年和2006—2009年检测SHFS的285例参与者的全血血铅水平。在2001—2003年和2006—2009年检测血压和心脏形态及功能。研究采用广义估计方程式评估血铅降低与血压变化的关联性,次要观察指标为心脏形态及功能测量值。结果显示,基线平均血铅为20.4μg/L。

关键词：血铅水平美洲印第安人心脏形态广义估计方程观察指标血压变化心血管疾病血压水平

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Apatite phosphate doped by cobalt as hight efficient catalyst of multi-component synthesis of therapeutic spiropyrimidine compound

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Natural Products and Bioprospecting 2022年第1期12卷 567-572页

作者： Abdallah Rhihil Youness Aichi mohamed Zahouily saïd Sebti mohamed El Guendouzi Laboratory of Chemistry Physics materials and Catalysis(LCPmC) Faculty of Sciences Ben M’sik of CasablancaHassan II University of CasablancaCasablancaMorocco Financial Engineering Governance and Development LaboratoryNational School of Business and Management of CasablancaHassan II University of CasablancaCasablancaMorocco Laboratory of materials Catalysis and Valorization of Natural ResourcesFaculty of Sciences and Technology of MohammediaHassan II University of CasablancaCasablancaMorocco

Spiropyrimidines vanquish a significant situation in the field of heterocyclic chemistry, they are broadly utilized as an antibacterial, an inhibitor of multidrug opposition, or an antiplatelet and antithrombotic drug. Phosphate, the principal moroccan mineral wealth occupies a vital spot in the economic sector and its valuation is a goal continually looked for. Among the conceivable outcomes of valorization, its utilization in heterogeneous catalysis which thought about an exceptionally encouraging new way. In this context, the focus on the reaction of the synthesis of spiropy-rimidine, catalyzed by natural phosphate (NP) and by fluoroapatite (Fap), are used alone or doped by cobalt. These phosphate catalysts were characterized by XRd, IR and SEm, while the synthesized spiropyrimidine was identified by IR, GC-mS and NmR. The obtained yield with fluorapatite doped by cobalt (Co/Fap), at room temperature in ethanol is very high and shows a high impact performance induced by a synergistic effect compared to that of NP alone.

关键词： Spiropyrimidine Natural phosphate Co/Fap Heterogeneous catalysis multicomponent reaction

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Role of a probiotic (saccharomyces boulardii) in management and prevention of diarrhoea

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World Journal of Gastroenterology 2006年第28期12卷 4557-4560页

作者： AG Billoo mA memon sa Khaskheli G murtaza Khalid Iqbal m saeed Shekhani Ahson Q Siddiqi department of Pediatrics Aga Khan UniversityKarachiParkistan department of Pathology Kharadar General HospitalKarachiParkistan department of Pediatrics Kharadar General HospitalKarachiParkistan Consultant Pediatrician Kharadar General HospitalKarachiParkistan medical director Kharadar General HospitalKarachiParkistan Assistant Professor of medicine Hamdard UniversityParkistan director medical and Regulatory Affairs Hilton Pharma (Pvt.) LtdParkistan

AIm： To assess the efficacy and safety of saccharomyces boulardii （S. boulardii） in acute watery diarrhoea and its role in reducing the frequency of episodes of diarrhoea in subsequent two months. mETHOdS： Children from 2 mo to 12 years of age, with acute diarrhoea were selected according to inclusion criteria and randomised in S. boulardii group （treated with ORS, nutritional support and S. boulardii, 250 mg bid） and in control group （treated with ORS and nutritional support only）. Active treatment phase was 5 d and each child was followed for two months afterwards. Frequency and consistency of stools as well as safety of drug was assessed on every visit. A comparison of two groups was done in terms of number of diarrhoeal episode in subsequent two months. RESULTS： There were fifty patients in each group. Baseline characteristics such as mean age and the average frequency of stools were comparable in S. boulardii and control group at the time of inclusion in the trial. By d 3 it reduced to 2.7 and 4.2 stools per d respectively and by d 6 it reduced to 1.6 （5. boulardii Group） and 3.3 （control group）. The duration of diarrhoea was 3.6 d in S. boulardii group whereas it was 4.8 d in control group （P = 0.001）. In the following two months, S. boulardii group had a significantly lower frequency of 0.54 episodes as compared to 1.08 episodes in control group. The drug was well accepted and tolerated. There were no reports of the side effects during treatment period CONCLUSION： S. boulardii significantly reduces the frequency and duration of acute diarrhoea. The consistency of stool also improves. The drug is well-tolerated.

关键词： Acute watery diarrhoea Probiotic saccharomyces boulardii Frequency of episodes of diarrhoea Weight gain

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Intelligent Resource Allocations for Software-defined mission-Critical IoT Services

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Computers, materials & Continua 2022年第11期73卷 4087-4102页

作者： Chaebeen Nam sa math Prohim Tam Seokhoon Kim department of Software Convergence Soonchunhyang UniversityAsan31538Korea department of Computer Software Engineering Soonchunhyang UniversityAsan31538Korea

Heterogeneous Internet of Things(IoT)applications generate a diversity of novelty applications and services in next-generation networks(NGN),which is essential to guarantee end-to-end(E2E)communication resources for both control plane(CP)and data plane(dP).Likewise,the heterogeneous 5th generation(5G)communication applications,including mobile Broadband Communications(mBBC),massive machine-Type Commutation(mmTC),and ultra-reliable low latency communications(URLLC),obligate to perform intelligent Quality-of-Service(QoS)Class Identifier(QCI),while the CP entities will be suffered from the complicated massive HIOT ***,the existing management and orchestration(mANO)models are inappropriate for resource utilization and allocation in large-scale and complicated network *** cope with the issues mentioned above,this paper presents an adopted software-defined mobile edge computing(SdmEC)with a lightweight machine learning(mL)algorithm,namely support vector machine(SVm),to enable intelligent mANO for real-time and resource-constraints IoT applications which require lightweight computation ***,the SVm algorithm plays an essential role in performing QCI ***,the software-defined networking(SdN)controller allocates and configures priority resources according to the SVm classification ***,the complementary of SVm and SdmEC conducts intelligent resource mANO for massive QCI environments and meets the perspectives of mission-critical communication with resource constraint *** on the E2E experimentation metrics,the proposed scheme shows remarkable outperformance in key performance indicator(KPI)QoS,including communication reliability,latency,and communication throughput over the various powerful reference methods.

关键词： mobile edge computing Internet of Things software defined networks traffic classification machine learning resource allocation

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