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3D打印技术在食品中的研究进展

南京农业大学学报 2025年第1期48卷 70-84页

作者：丁可盈金晶任玉金鹏郑永华吴正国南京农业大学食品科学技术学院江苏南京210095

3D打印技术是一种新兴的制造技术,其可以利用数字模型实现精准制造。近年来,3D打印技术已经被广泛应用于各个领域,包括食品、生物医药等。3D食品打印的优势在于能够制作复杂的食品模型、设计独特的图案以及精准定制。3D食品打印技术由... 详细信息

3D打印技术是一种新兴的制造技术,其可以利用数字模型实现精准制造。近年来,3D打印技术已经被广泛应用于各个领域,包括食品、生物医药等。3D食品打印的优势在于能够制作复杂的食品模型、设计独特的图案以及精准定制。3D食品打印技术由挤出式打印、黏结剂喷射和喷墨打印组成,其利用食品材料,基于逐层堆积的方式设计造型。本文重点介绍了3D打印技术在食品中的最新研究进展,深入总结了3D打印技术在不同类型食品应用中的特点和局限性。同时,通过介绍食品的精准营养递送、贮藏保鲜、食品加工、生物制造等方面,详细分析了3D打印在食品行业的应用现状。最后展望了未来食品3D打印技术的发展,以期为3D打印与食品产业的深度融合提供理论指导。

关键词： 3D打印食品加工精准营养食品包装

Sinogram denoising via attention residual dense convolutional neural network for low-dose computed tomography

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Nuclear Science and Techniques 2021年第4期32卷 70-83页

作者： Yin-jin Ma Yong Ren peng Feng peng He xiao-Dong Guo Biao Wei Key Laboratory of Optoelectronic Technology and Systems Ministry of EducationChongqing UniversityChongqing 400044China School of Data Science Tongren UniversityTongren 554300China School of Microelectronics and Communication Engineering Chongqing UniversityChongqing 400044China Department of Biomedical Engineering Rensselaer Polytechnic InstituteTroyNY 12180USA

The widespread use of computed tomography(CT)in clinical practice has made the public focus on the cumulative radiation dose delivered to ***-dose CT(LDCT)reduces the X-ray radiation dose,yet compromises quality and decreases diagnostic *** have made great efforts to develop various algorithms for LDCT and introduced deep-learning techniques,which have achieved impressive ***,most of these methods are directly performed on reconstructed LDCT images,in which some subtle structures and details are readily lost during the reconstruction procedure,and convolutional neural network(CNN)-based methods for raw LDCT projection data are rarely *** address this problem,we adopted an attention residual dense CNN,referred to as AttRDN,for LDCT sinogram ***,it was aided by the attention mechanism,in which the advantages of both feature fusion and global residual learning were used to extract noise from the contaminated LDCT ***,the denoised sinogram was restored by subtracting the noise obtained from the input noisy ***,the CT image was reconstructed using filtered *** experimental results qualitatively and quantitatively demonstrate that the proposed AttRDN can achieve a better performance than state-of-the-art ***,it can prevent the loss of detailed information and has the potential for clinical application.

关键词： Low-dose CT Sinogram denoising Deep learning Attention mechanism

A numerical study of the early-stage dynamics of a bubble cluster

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Journal of Hydrodynamics 2020年第5期32卷 845-852页

作者： Ya-zhen Shi Kai Luo xiao-peng Chen Dai-jin Li School of Marine Science and Technology Northwestern Polytechnical UniversityXi’an 710072China School of Mechanics Civil Engineering and ArchitectureNorthwestern Polytechnical UniversityXi’an 710129China

The dynamics of multiple cavitating bubbles is numerically simulated,with the ambient pressure lower than the saturated vapor pressure,using a pseudopotential lattice Boltzmann method(LBM)coupled with the Camahan-Starling equation of ***-bubble and multi-bubble systems are tested,and the method for the bubble cluster is *** is found that the bubble can either grow or collapse in the early stage,depending on the configuration of the bubble cluster,characterized by the bubble number,the inter-bubble distance and the initial *** the induced flow,the bubbles are mutually *** relations of the interaction are proposed according to the numerical *** consideration of the interactions,the simplified Rayleigh-Plesset equations(RPEs)for multiple bubbles can describe the evolution of the bubbles *** results may serve as the basis for improved cavitation models.

关键词： Cavitation bubble dynamics interaction lattice Boltzmann method(LBM) Rayleigh-Plesset equation(RPE)

Palladium-catalyzed enantioselective carbonylation reactions

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Science China Chemistry 2022年第3期65卷 441-461页

作者： jin-Bao peng Xin-Lian Liu Lin Li xiao-Feng Wu School of Biotechnology and Health Sciences Wuyi UniversityJiangmen 529020China Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesLiaoning 116023China Leibniz-Institut für Katalyse e.V. Albert-Einstein-Straße 29aRostock 18059Germany

Carbonylation,one of the most powerful approaches to the preparation of carbonylated compounds,has received significant attention from researchers active in various ***,impressive progress has been made on this subject over the past few *** the various types of carbonylation reactions,asymmetric carbonylation is a straightforward methodology for constructing chiral *** rhodium-catalyzed enantioselective hydroformylations have been discussed in several elegant reviews,a general review on palladium-catalyzed asymmetric carbonylations is still *** this review,we summarize and discuss recent achievements in palladium-catalyzed asymmetric carbonylation ***,this review’s contents are categorized by reaction type.

关键词： palladium catalyst enantioselective carbonylation chiral

Co_(3)O_(4)/stainless steel catalyst with synergistic effect of oxygen vacancies and phosphorus doping for overall water splitting

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Tungsten 2023年第1期5卷 100-108页

作者： xiao-xiao Li xiao-Chao Liu Chao Liu jin-Ming Zeng xiao-peng Qi College of Rare Earth Jiangxi University of Science and TechnologyGanzhou 341000China Faculty of Materials Metallurgy and Chemistry Jiangxi University of Science and TechnologyGanzhou 341000China

The electrolysis of water into hydrogen and oxygen provides an effective means of storing electrical energy *** current challenge is to design an optimal catalyst that exhibits low overpotentials,long-term stability,universal availability,and only uses inexpensive ***,a Co3O4nanoflower/stainless steel(P-Ov-CO_(3)O_(4)/SS) catalyst with both oxygen vacancies(Ovs) and phosphorus doping was perfectly prepared via a simple three-step *** Ovs promoted charge transfer and accelerated the electrocatalysis,while P finely tuned the surface charge *** resulted in numerous active sites for catalysis,and the synergistic effect of phosphorus doping and oxygen vacancies was finely *** resultant electrocatalyst exhibited low hydrogen evolution overpotentials of 118 mV(-10 mA·cm^(-2)) and 242(-200 mA·cm^(-2)),as well as oxygen evolution overpotentials of 327 mV(100 mA·cm^(-2)) and 370 mV(200 mA·cm^(-2)),owing to the excellent synergistic effect of the Ovs and low-temperature ***,P-Ov-Co_(3)O_(4)/SS//P-Ov-Co_(3)O_(4)/SS exhibited a low water splitting voltage of 1.681 V at 20 *** findings will enable the synthesis of novel high-performance electrocatalysts for overall water splitting.

关键词： Oxygen vacancy Phosphorus doping P-Ov-Co_(3)O_(4)/SS Overall water splitting

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爆炸切割网络传爆中的间隙与角度效应

火工品 2025年第1期 37-43页

作者：周晓鹏姜勇袁航中国船舶集团有限公司第七一三研究所河南郑州450015 河南省水下智能装备重点实验室河南郑州450015

为研究爆炸切割网络中传爆节点处传爆能力的关键影响因素,通过改变切割索对传爆药柱的传爆间隙进行了平板传爆试验,将试验结果结合仿真分析确定了JO-11C传爆药柱的仿真材料参数,并进一步分析了传播角度对传爆能力的影响。研究结果表明:... 详细信息

为研究爆炸切割网络中传爆节点处传爆能力的关键影响因素,通过改变切割索对传爆药柱的传爆间隙进行了平板传爆试验,将试验结果结合仿真分析确定了JO-11C传爆药柱的仿真材料参数,并进一步分析了传播角度对传爆能力的影响。研究结果表明:随着传爆间隙的增加,传爆能力下降,切割索对传爆药柱的最大传爆间隙区间为2.0~2.5 mm;同时,传爆角度的增大能够显著提高传爆能力。本研究为爆炸切割网络的传爆性能研究以及提高武器系统的可靠性提供了参考。

关键词：爆炸切割网络传爆间隙传爆角度传爆药柱仿真分析

An internal cooling grinding wheel:From design to application

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Chinese Journal of Aeronautics 2023年第11期36卷 465-482页

作者： Xiangwu xiao Yufeng jin Meiliang CHEN Ruitao peng Heng TANG Jiangxiong GAO School of Mechanical Engineering Xiangtan UniversityXiangtan 411105China College of Mechatronics and Control Engineering Shenzhen UniversityShenzhen 518000China Zhuzhou Huarui Precision Tools Co.LTD Zhuzhou 412000China

The cooling and lubrication conditions during the grinding process significantly impact the nickel-based superalloy’s final service *** existing jet cooling and heat pipe technology can solve the heat conduction problem in the grinding process of ***,managing cooling,lubrication,and chip removal are *** paper describes the design and fabrication of a novel central fluid-through internal cooling slotted grinding wheel with an ordered grain pattern to improve the grinding machinability of a nickel-based *** pressurized grinding fluid was ejected into the grinding zone via the pipe and tool holder from the lower-end face of the inner cooling *** structure of the grinding wheel was optimized using computational fluid dynamics(CFD).The flow field in the grinding area achieved the highest overall flow rate,distribution homogeneity,and effective exit flow when the internal flow channel had four *** exit for the inner runner is located at the abrasive edge and diamond staggered ***-layer brazing was used to create cubic boron nitride(CBN)abrasive rings with various abrasive *** internal cooling wheel matrix and various components were prepared according to the optimized grinding wheel geometry model.A grinding test bench was built to conduct an experimental study of grinding the nickel-based alloy *** results show that,under the same conditions,a diamond-shaped staggered pattern obtains lower grinding temperature,lower surface roughness,better surface morphology,and more significant residual compressive stress distribution than an abrasive cluster diagonal circular staggered pattern or disordered *** average effective flow rate calculated by CFD is increased by 42.3%when compared to the disordered *** the experiment,compared to the disordered arrangement,with the increase of grinding wheel’s rotating speed and coolant pressure,the average grinding temperature of abras

关键词： Flow field analysis Grinding experiment Internal cooling grinding wheel Ordered pattern Surface hardening

Transition toward thorium fuel cycle in a molten salt reactor by using plutonium

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Nuclear Science and Techniques 2017年第10期28卷 103-112页

作者： De-Yang Cui Shao-peng Xia xiao-xiao Li Xiang-Zhou Cai jin-Gen Chen Shanghai Institute of Applied Physics Chinese Academy ofSciencesShanghai 201800China CAS Innovative Academies in TMSR Energy System Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China

The molten salt reactor(MSR), as one of the Generation Ⅳ advanced nuclear systems, has attracted a worldwide interest due to its excellent performances in safety, economics, sustainability, and proliferation resistance. The aim of this work is to provide and evaluate possible solutions to fissile 233 U production and further the fuel transition to thorium fuel cycle in a thermal MSR by using plutonium partitioned from light water reactors spent fuel. By using an in-house developed tool, a breeding and burning(B&B) scenario is first introduced and analyzed from the aspects of the evolution of main nuclides, net 233 U production, spectrum shift, and temperature feedback coefficient. It can be concluded that such a Th/Pu to Th/^(233)U transition can be accomplished by employing a relatively fast fuel reprocessing with a cycle time less than 60 days. At the equilibrium state, the reactor can achieve a conversion ratio of about 0.996 for the 60-day reprocessing period(RP) case and about 1.047 for the 10-day RP *** results also show that it is difficult to accomplish such a fuel transition with limited reprocessing(RP is 180 days),and the reactor operates as a converter and burns the plutonium with the help of thorium. Meanwhile, a prebreeding and burning(PB&B) scenario is also analyzed briefly with respect to the net 233 U production and evolution of main nuclides. One can find that it is more efficient to produce 233 U under this scenario, resulting in a double time varying from about 1.96 years for the 10-day RP case to about 6.15 years for the 180-day RP case.

关键词：钍燃料循环反应器熔盐堆先进核能系统钚循环时间轻水反应堆燃料后处理

Direct N-gem-difluorocyclopropylation of nitro-heterocycles by utilizing gem-difluorocyclopropyl tosylate

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Chinese Chemical Letters 2014年第1期25卷 24-28页

作者： Wei-peng Gu jin-Hong Lin Ji-Chang xiao Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic ChemistryChinese Academy of Sciences

We have developed an efficient method to achieve N-gem-difluorocyclopropylation of N-heterocycles with the use of gem-difluorocyclopropyl tosylate as a building block under mild conditions, gem- Difluorocyclopropyl to... 详细信息

关键词： N-gem-Difluorocyclopropylation N-Heterocycles gem-Difluoracyclopropyl tosylate Building block