检索结果-南通市图书馆

虚拟现实技术在生命末期患者中应用的范围综述

在线全文

学校读者我要写书评

暂无评论

护理学报 2024年第7期31卷 40-45页

作者：郭俊晨刘超毅戴云云蒋思珊杨索谌永毅湖南省肿瘤医院湖南长沙410006 桂林医学院广西桂林541000

目的对虚拟现实技术在生命末期患者中应用的相关研究进行范围综述,为我国医护人员在生命末期照护领域深入开发和运用虚拟现实技术提供参考。方法以澳大利亚JBI循证卫生保健中心提出的范围综述指南为方法学指导,计算机检索PubMed、Web of... 详细信息

目的对虚拟现实技术在生命末期患者中应用的相关研究进行范围综述,为我国医护人员在生命末期照护领域深入开发和运用虚拟现实技术提供参考。方法以澳大利亚JBI循证卫生保健中心提出的范围综述指南为方法学指导,计算机检索PubMed、Web of Science、Embase、Cochrane library、CINAHL、中国生物医学文献数据库、中国知网、万方数据服务平台和维普数据库,检索时限为建库至2023年8月。由2名研究人员独立筛选并提取资料。结果共纳入13篇文献,均为英文文献,虚拟现实技术干预类型主要为基于沉浸式的观影或游戏体验等,干预总时长为1 d至4周不等,4~60 min/次;结局指标主要包括对生命末期患者疼痛水平、症状困扰、心理或精神健康水平、生活质量、生理参数的影响,以及可行性与可接受性等指标。结论虚拟现实技术在生命末期患者中应用具有较强的可行性与较高的可接受度,未来仍需要开展大样本、高质量的研究来验证虚拟现实技术在生命末期患者中的应用效果,为制订符合我国生命末期群体特点的最佳虚拟现实技术干预方案提供循证依据。

关键词：虚拟现实技术生命末期安宁疗护范围综述

在线全文

学校读者我要写书评

暂无评论

层级化实验引导中学物理运动观念形成

物理教学探讨 2024年第5期42卷 61-65页

作者：麦树荣彭晓春陈泳仪广州市南沙东涌中学广州511450 广州市南沙第一中学广州511458 广州市禺山高级中学广州511400

运动观念是中学物理观念的重要内容,通常运动观念与相互作用观念并在一起,注重研究运动特征产生的原因,忽视了运动的属性观、描述观、形式观与规律观,忽视了运动观念内涵的分析与研究。通过中学物理实验及数据处理软件的辅助应用,从运... 详细信息

运动观念是中学物理观念的重要内容,通常运动观念与相互作用观念并在一起,注重研究运动特征产生的原因,忽视了运动的属性观、描述观、形式观与规律观,忽视了运动观念内涵的分析与研究。通过中学物理实验及数据处理软件的辅助应用,从运动属性的研究、运动径迹的描述、运动形式的分析以及运动规律的探究与总结,促进学生运动观念的形成。

关键词：中学物理分层实验 Tracker软件运动观念

Ultrahigh spatiotemporal resolution beam signal reconstruction with bunch phase compensation

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2024年第5期35卷 99-108页

作者： You-Ming Deng yong-Bin Leng Xing-yi Xu Jian chen yi-Mei Zhou Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of the Chinese Academy of Sciences Beijing 100049China Shanghai Synchrotron Radiation Facility Chinese Academy of SciencesShanghai 201204China University of Science and Technology of China Hefei 230026China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201204China

Various electromagnetic signals are excited by the beam in the acceleration and beam-diagnostic elements of a particle *** is important to obtain time-domain waveforms of these signals with high temporal resolution for research,such as the study of beam–cavity interactions and bunch-by-bunch parameter ***,a signal reconstruction algorithm with ultrahigh spatiotemporal resolution and bunch phase compensation based on equivalent sampling is proposed in this *** with traditional equivalent sampling,the use of phase compensation and setting the bunch signal zero-crossing point as the time reference can construct a more accurate reconstructed *** basic principles of the method,simulation,and experimental comparison are also *** on the beam test platform of the Shanghai Synchrotron Radiation Facility(SSRF)and the method of experimental verification,the factors that affect the reconstructed signal quality are analyzed and discussed,including the depth of the sampled data,quantization noise of analog-to-digital converter,beam transverse oscillation,and longitudinal *** results of the beam experiments show that under the user operation conditions of the SSRF,a beam excitation signal with an amplitude uncertainty of 2%can be reconstructed.

关键词： Turn-by-turn bunch phase compensation technique Equivalent sampling Signal reconstruction algorithm Ultrahigh spatiotemporal resolution SSRF

Lipase and photodecarboxylase coexpression: A potential strategy for alkane-based biodiesel production from natural triglycerides

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2024年第3期67卷 238-246页

作者： yong-yi Zeng Xin-yi Xu Jin-Xuan Xie Wen-Li chen Lan Liu Xin-Jian yin Bi-Shuang chen School of Marine Sciences Sun Yat-Sen UniversityZhuhai 519080China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519080China

Alkane-based biodiesel is considered the next generation of biodiesel owing to its potential environmental benefits and the fact that it exhibits much higher specific caloric values than traditional ***,the formidable obstacle impeding the commercialization of this cutting-edge fuel alternative lies in the cost associated with its *** this study,an engineered strain Escherichia coli(***)showcasing harmonized coexpression of a lipase(from Thermomyces lanuginosus lipase,TLL)and a fatty acid photodecarboxylase(from Chlorella variabilis,CvFAP)was first constructed to transform triglycerides into *** potential of *** BL21(DE3)/pRSFDuet-1-TLL-CvFAP for alkane synthesis was evaluated with tripalmitin as a model substrate under various process *** a comprehensive examination of the reaction parameters,the scope of the biotransformation was expanded to‘real’substrates(vegetable oils).The results showed that bioderived oils can be transformed into alkanes with high yields(0.80-10.20 mmol·L^(-1))under mild conditions(35℃,pH 8.0,and 36 h)and blue light *** selected processes were performed on an increased lab scale(up to 100 ml)with up to 24.77 mmol·L^(-1) tripalmitin,leading to a yield of 18.89 mmol·L^(-1) *** the employment of a method for efficiently producing alkanes under mild conditions and a simple procedure to isolate alkanes from the reaction system,the utilization of sustainable biomass as a fundamental feedstock emerges as the primary solution to lower the cost of alkane-based ***,this study proposes a readily implementable and highly effective approach for alkane-based biodiesel production.

关键词： Alkane-based biodiesel Renewable biomass Co-overexpression Lipase Photodecarboxylase

Atomistic study on the microscopic mechanism of grain boundary embrittlement induced by small dense helium bubbles in iron

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2024年第3期35卷 84-95页

作者： Lei Peng yong-Jie Sun Jing-yi Shi yi-Fei Liu Shang-Ming chen Liu-Liu Li State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of ChinaChengdu 610213China

The helium bubbles induced by 14 MeV neutron irradiation can cause intergranular fractures in reduced activation ferritic martensitic steel,which is a candidate structural material for fusion *** order to elucidate the susceptibility of different grain boundaries(GBs)to helium-induced embrittlement,the tensile fracture processes of 10 types of GBs with and without helium bubbles in body-centered cubic(bcc)iron at the relevant service temperature of 600 K were investigated via molecular dynamics *** results indicate that in the absence of helium bubbles,the GBs studied here can be classified into two distinct categories:brittle GBs and ductile *** atomic scale analysis shows that the plastic deformation of ductile GB at high temperatures originates from complex plastic deformation mechanisms,including the Bain/Burgers path phase transition and deformation twinning,in which the Bain path phase transition is the most dominant plastic deformation ***,the presence of helium bubbles severely inhibits the plastic deformation channels of the GBs,resulting in a significant decrease in elongation at *** bubble-decorated GBs,the ultimate tensile strength increases with the increase in the misorientation ***,the coherent twin boundary∑3{112}was found to maintain relatively high fracture strength and maximum failure strain under the influence of helium bubbles.

关键词： Helium bubble Grain boundary Embrittlement Reduced activation ferritic martensitic steel Molecular dynamics Bain path

A Literature Review of Advancing Early STEM Education in the GBA

在线全文

学校读者我要写书评

暂无评论

Journal of Literature and Art Studies 2022年第6期12卷 691-697页

作者： chen yong-yi School of HongKong Education University HongKongChina

There are many previous studies indicating that STEM pedagogy has various positive functions for ***,the details of STEM education still need to be further studied to make it more widely available in early *** this research,I will review the impact of STEM education on early childhood development through various literary theories.I hope to further conclude the influence of STEM education and its positive functions on *** can provide information to pre-schools and early education centres to help more young children get early exposure to STEM education and develop their abilities in different aspects.

关键词： ECE Function GBA STEM Education

The homogenous growth of Co-based coordination compound on graphene nanosheet for high-performance K-organic battery and its reaction mechanism

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

Rare Metals 2024年第4期43卷 1622-1634页

作者： Qian-Qian Peng yi-Ting Wang Shuo Qi Yao Xiao yong Wang Shuang-Qiang chen School of Environmental and Chemical Engineering Shanghai UniversityShanghai200444China School of Chemistry and Materials Engineering Wenzhou UniversityWenzhou325035China

Metal coordination compounds(MCCs)are gaining popularity for potassium-ion batteries(PIBs)owing to their tuneable structure,multiple reaction sites,low cost and unique ***,they are generally subjected to intrinsic features of the sluggish ionic diffusion coefficient,low electronic conductivity and slow ***,a new MCC material of cobalt-1,3,5-trioxy-2,4,6-triamino-benzo(Co-TB)coordination compound was synthesized and homogenously grown on the surface of graphene nanosheets(GNS),forming a Co-TB@GNS composite with enhanced electronic conductivity and flexible *** from the overall enhanced conductivity,high surface area and abundant activated K-storage sites,Co-TB@GNS electrodes have exhibited superior cycling performance with high reversible capacities(312 mAh·g^(-1)after 100 cycles at 100 mA·g^(-1),224 mAh·g^(-1)after 500 cycles at 1 A·g^(-1))and better rate performances compared with the pure Co-TB compound when served as PIB's ***,multiple in-situ measurement techniques have jointly confirmed that the organic functional groups(C=O,C=N and C=C of benzene rings)and Co^(2+)in Co-TB are the main reversible K-storage sites,including in-situ Fourier transform infrared spectroscopy(FTIR)and X-ray diffraction(XRD),and partial capacity contribution is originated from GNS by the apparent K-storage behavior in the in-situ XRD pattern,proving the possibility of K-storage for metal-organic materials.

关键词： Metal coordination compounds Potassiumion battery Cobalt coordination compound K-storage mechanism

Controllable nucleation and deformation of skyrmions on surface of magnetic nanotubular monolayer

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2024年第7期43卷 3250-3259页

作者： Xin-Xin Zhang chen-Yu Zhang yi-Xin Xing Chao Man Jiao Liu yong Hu Department of Physics College of SciencesNortheastern University School of Materials and Mineral Resources Engineering Universiti Sains MalaysiaEngineering Campus State Key Laboratory of Rolling and Automation Northeastern University

Magnetic skyrmions emerge when the energy of ferromagnetic exchange interaction promoting parallel alignment of spins enters in competition with energies favoring non-collinear alignment of spins such as Dzy aloshinskii-Moriya interaction(DMI),long-rang dipole-dipole interaction(DDI),or higher-order exchange *** perform an unbiased Monte Carlo simulation to study the DMI-based skyrmion nucleation and stabilization on the surface of magnetic nanotubular monolayer controlled by tuning constants of DDI(g) and next-nearest-neighbor antiferromagnetic exchange interaction(j') with appropriate *** g and j',the loosely distributed skyrmions initially nucleate on the surface of nanotube approaching to the magnetic field(h) direction with increasing h in the intermediate ***,the skyrmion size,shape,density,distribution and crystal structure,as well as its driven field range,are tailored by g and j'.This work demonstrates the skyrmion nucleation mechanisms in three-dimensional magnetic nanostructures with curvature effect and multiple interactions,serving as a benchmark for a guide to experimentalists for preparation of samples in magnetic skyrmion states.

关键词： Magnetic nanotube Magnetic skyrmion Dzyaloshinskii–Moriya interaction Dipole–dipole interaction Monte Carlo simulation

Research on the influences of motion characteristics of jetting projectile charge under water

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2024年第3期33卷 411-425页

作者： Xing chen yong-gang Lu Institute of Systems Engineering China Academy of Engineering PhysicsMianyang 621900SichuanChina

Shaped charge warhead is important for enhancing the damage performance of underwater *** paper used finite element analysis software and based on JPC water penetration experiments to examine the influence of liner parameters(wall thickness,material),charge aspect ratio,and stand-off distance on the movement characteristics of JPC in *** findings reveal that the head diameter of the JPC increases and experiences significant erosion after entering the water,the effective length of the JPC in water undergoes two distinct phases:a growth phase and a decrease phase,with the velocity of the JPC decaying *** the liner thickness,stand-off distance and the charge aspect ratio can improve the erosion resistance and the velocity retention capacity of the *** optimal ranges for liner thickness and stand-off distance are 0.0363D_(k) to 0.0545D_(k)(D_(k) is the charge diameter),the stand-off distance should be within 1.0D_(k).After the charge aspect ratio higher than 1.25,the charge structure exerts minimal influence the movement characteristics of the JPC in *** density plays a crucial role in the velocity decay pattern of the JPC during *** with higher densities exhibit superior velocity retention capabilities in water,with the velocity decay pattern converging if the densities are ***,copper,tantalum and tungsten liners are deemed appropriate for underwater shaped charge ***,the results will provide an important reference for the design of underwater shaped charge warhead.

关键词： JPC Movement characteristics Underwater penetration Numerical simulation