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破片撞击裸药柱临界起爆速度判据的研究

兵器装备工程学报 2024年第9期45卷 1-8页

作者：张薇崔浩高振国郭锐南京理工大学机械工程学院南京210094 中国人民解放军93145部队合肥230088

为了获得破片以不同入射角撞击不同曲率半径裸药柱的冲击起爆判据,以Held提出的判据为基础,考虑破片入射角和裸药柱曲率半径2个因素,采用Autodyn软件对球形破片撞击裸药柱的过程展开了数值仿真计算,得到了30种工况下炸药装药的临界起爆... 详细信息

为了获得破片以不同入射角撞击不同曲率半径裸药柱的冲击起爆判据,以Held提出的判据为基础,考虑破片入射角和裸药柱曲率半径2个因素,采用Autodyn软件对球形破片撞击裸药柱的过程展开了数值仿真计算,得到了30种工况下炸药装药的临界起爆速度,获得了破片入射角、裸药柱曲率半径对炸药临界起爆速度的影响规律,通过Matlab软件拟合得到修正项,建立了关于破片入射角和裸药柱曲率半径的炸药临界起爆速度修正判据。结果显示建立的修正判据和数值仿真结果吻合较好,表明该修正判据可以较好地预测裸药柱的冲击起爆条件。

关键词：冲击起爆临界起爆速度判据修正裸药柱入射角曲率半径

Sustainable development and upgrading mode of coal industry in China

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International Journal of Mining Science and Technology 2012年第3期22卷 335-340页

作者： gao zhenguo School of Economics Wuhan University of Technology Wuhan 430070 China Zhengzhou Coal Industry (Croup) Co. Ltd. Zhengzhou 450007 China

It is an emerging realistic problem on how to promote a high level of technology in the coal industry, find new upgrading powers and create new competitive advantages, which are also the core problems to efficient transformation pattern of economic growth for coal industry in the ''twelfth five-year'' period, involving the key to China's energy supply and energy security. Through field surveys and inductive analyses, analyzing of the content of upgrading the coal industry as an entry point, this paper analyzes the sustainable development mechanisms for the coal industry from the aspects of work force, power, methods, goals, and so on; and puts forward corresponding developmental modes according to the mechanisms which can improve resource recovery and mineral resources utilization rates by putting them into practice.

关键词： Sustainable developmentUpgrading mechanismUpgrading mode

微胶囊型自修复环氧树脂材料的力学性能及修复效率

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中国塑料 2024年第5期38卷 40-46页

作者：王涵梁金华高振国姜炜周昊南京理工大学化学与化工学院南京210094 93145部队合肥230088

为了探究自修复环氧树脂微胶囊的引入对树脂基复合材料的力学性能和修复性能的影响,将由原位聚合法制得的环氧树脂微胶囊和潜伏型固化剂邻苯二甲酸酐组成的修复体系加入到E51环氧树脂和固化剂改性聚醚胺中,通过实验研究了混合体系的剪... 详细信息

为了探究自修复环氧树脂微胶囊的引入对树脂基复合材料的力学性能和修复性能的影响,将由原位聚合法制得的环氧树脂微胶囊和潜伏型固化剂邻苯二甲酸酐组成的修复体系加入到E51环氧树脂和固化剂改性聚醚胺中,通过实验研究了混合体系的剪切黏度,并进一步分析了材料的力学性能和修复效率。结果表明,复合材料的力学性能随着自修复组分含量的升高而降低,复合材料的修复效率随着自修复组分含量的升高与而升高,但修复后复合材料的抗拉强度并不是随着自修复组分含量的升高而递增的。综合分析实验结果得出的最优选择为自修复组分的比例为3/2,含量为8%(质量分数,下同),此时复合材料的抗拉强度为15.32 MPa,断裂修复后抗拉强度10.13 MPa,修复效率66.12%。

关键词：自修复微胶囊环氧树脂基复合材料力学性能修复效率

离子吸附型稀土矿区硫酸铵原位浸矿与淋洗过程的室内模拟

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复旦学报（自然科学版） 2024年第1期63卷 134-142页

作者：高震国周铭奚高胜杨晓英王梓萌复旦大学环境科学与工程系上海200433

离子吸附型稀土尾矿中残留的大量硫酸铵浸矿剂随雨水淋滤进入周边环境,可造成矿区及周边土壤和水体严重污染。本研究通过实地采集稀土矿区土壤,开展室内一维土柱实验分别模拟浸矿过程和淋洗过程,并建立Hydrus-1D模型,评价该模型对稀土... 详细信息

离子吸附型稀土尾矿中残留的大量硫酸铵浸矿剂随雨水淋滤进入周边环境,可造成矿区及周边土壤和水体严重污染。本研究通过实地采集稀土矿区土壤,开展室内一维土柱实验分别模拟浸矿过程和淋洗过程,并建立Hydrus-1D模型,评价该模型对稀土矿浸矿和淋洗过程的模拟性能。Hydrus-1D模型的弥散度的率定值为0.5 cm,浸矿与淋洗过程的K d的率定值分别为0.07 cm^(3)/g和1.2 cm^(3)/g;在浸矿过程模拟中,4个观测孔模型的R^(2)为0.95~0.99,E_(RMS)为1.3~6.8 mmol/L;淋洗过程的R^(2)为0.93~0.98,E_(RMS)为0.2~1.6 mmol/L;Hydrus-1D能够较好模拟浸矿和淋洗过程中NH_(4)^(+)的迁移行为。示踪实验中Cl^(-)穿透耗时为30~90 min;浸矿实验中,4个观测孔达到吸附饱和耗时为60~150 min;淋洗实验中,4个观测孔的NH_(4)^(+)浓度低于检测限的耗时为360~540 min;土壤吸附作用对浸矿与淋洗过程中NH+4运移过程的影响显著。

关键词：离子吸附型稀土矿硫酸铵迁移行为土柱实验 Hydrus

Improved spectrum sharing algorithm based on feedback control information in cognitive radio networks

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Journal of Systems Engineering and Electronics 2013年第4期24卷 564-570页

作者： Yibing Li Rui Yang Fang Ye zhenguo gao College of Information and Communication Engineering Harbin Engineering University College of Automation Harbin Engineering University

In order to avoid the system performance deterioration caused by the wireless fading channel and imperfect channel estimation in cognitive radio networks, the spectrum sharing problem with the consideration of feedback control information from the primary user is analyzed. An improved spectrum sharing algorithm based on the combination of the feedback control information and the optimization algorithm is proposed. The relaxation method is used to achieve the approximate spectrum sharing model, and the spectrum sharing strategy that satisfies the individual outage probability constraints can be obtained iteratively with the observed outage probability. Simulation results show that the proposed spectrum sharing algorithm can achieve the spectrum sharing strategy that satisfies the outage probability constraints and reduce the average outage probability without causing maximum transmission rate reduction of the secondary user.

关键词： cognitive radio spectrum sharing power control feedback control information.

Research progress on preparation and purification of fluorine-containing chemicals in lithium-ion batteries

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Chinese Journal of Chemical Engineering 2022年第1期35卷 73-84页

作者： Xiaobin Liu zhenguo gao Jingcai Cheng Junbo Gong Jingkang Wang State Key Laboratory of Chemical Engineering School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China CAS Key Laboratory of Green Process and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China The Co-Innovation Center of Chemistry and Chemical Engineering of Tianjin Tianjin 300072China

With the development of digital products,electric vehicles and energy storage technology,electronic chemicals play an increasingly prominent role in the field of new energy such as lithium-ion *** chemicals have attracted extensive attention in various *** of high-end electronic chemicals are high purity and low impurity content,which requires a very strict separation and purification *** present,crystallization is a key technology for their separation and purification of electronic *** this work,the representative fluorine-containing compounds in cathode and anode materials,separator and electrolyte of lithium-ion batteries are *** latest technologies for the preparation and purification of four kinds of fluorine-containing battery chemicals by crystallization technology are *** addition,the research prospects and suggestions are put forward for the separation of fluorine-containing battery chemicals.

关键词： Battery chemicals Lithium-ion batteries Crystallization Fluorine-containing chemicals

Recent Developments in the Crystallization Process： Toward the Pharmaceutical Industry

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Engineering 2017年第3期3卷 343-353页

作者： zhenguo gao Sohrab Rohani Junbo Gong Jingkang Wang Department of Chemical and Biochemical Engineering The University of Western Ontario London ON N6A 5B9 Canada School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China

Crystallization is one of the oldest separation and purification unit operations, and has recently contributed to significant improvements in producing higher-value products with specific properties and in building efficient manufacturing processes. In this paper, we review recent developments in crystal engineering and crystallization process design and control in the pharmaceutical industry. We systematically summarize recent methods for understanding and developing new types of crystals such as co-crystals, polymorphs, and solvates, and include several milestones such as the launch of the first co-crystal drug, Entresto （No- vartis）, and the continuous manufacture of Orkambi （Vertex）. Conventional batch and continuous processes, which are becoming increasingly mature, are being coupled with various control strategies and the recently developed crystallizers are thus adapting to the needs of the pharmaceutical industry. The development of crystallization process design and control has led to the appearance of several new and innovative crystal- lizer geometries for continuous operation and improved performance. This paper also reviews major recent orogress in the area of process analytical technology.

关键词： Crystallization Crystal engineering Polymorphism Crystallization process design and control Crystal size distribution

Novel magnetic silicate composite for lightweight and efficient electromagnetic wave absorption

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Journal of Materials Science & Technology 2021年第33期92卷 51-59页

作者： Di Lan Zehao Zhao zhenguo gao Kaichang Kou Hongjing Wu MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Northwestern Polytechnical UniversityXi’an 710072China

A series of silicates with double shell hollow sphere morphology were prepared by hydrothermal method with ultra-high temperature calcined,and used in the field of electromagnetic(EM)wave *** characterizing the chemical composition,crystal structure,micro morphology and EM parameters of the several materials,the evaluation results of EM wave absorption capacity of the materials were *** the discussion section,we will discuss the reasons for the differences in EM wave absorption capabilities of the several silicates from multiple aspects such as EM wave absorption mechanism in *** for iron-based silicate(HGMs@Fe_(2)SiO_(4))materials,after reasonable composition and morphology design,the minimum reflection loss(RLmin)reached up to-41.14 d B with a matching thickness(d)of 3.4 mm,and the corresponding effective absorption bandwidth(f_(E),RL<-10 d B)was 6.80 *** of the wide EM wave absorption bandwidth,light weight and low water absorption,this kind of double shell silicate material has gained huge application potential in the EM wave absorption field.

关键词： Magnetic silicate composite Electromagnetic wave absorption Impendance matching

Rational manipulation of composition and construction toward Zn/Co bimetal hybrids for electromagnetic wave absorption

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Journal of Materials Science & Technology 2023年第3期134卷 254-261页

作者： Xiuyun Ren Yihe Song zhenguo gao Yalan Wu Zirui Jia Guanglei Wu Institute of Materials for Energy and Environment State Key Laboratory of Biofibers and Eco-TextilesCollege of Materials Science and EngineeringQingdao UniversityQingdao 266071China School of Chemistry and Chemical Engineering Northwestern Polytechnical UniversityXi’an 710072China Department of Nephrology Xi’an People’s HospitalXi’an 710000China

Rational manipulation of multi-metal hybrids with controllable compositions and constructions is evolv-ing as an efficacious strategy for tunable electromagnetic(EM)characteristics and EM wave(EMW)***,a novel bi-orientation etching approach is proposed to regulate the chemical composi-tions and hybridization construction of Zn/Co hybrids,thence meeting the synergistic interaction among diverse compositions for ultra-high EMW *** to the stepwise heterometallic modi-fication by Zn in Co-ZIFs(Zn@Co-ZIF)and Co in Zn-ZIFs(Co@Zn-ZIF),corresponding pyrolysis products with variable Zn/Co atomic concentration and hybridization states(Zn@Co-C,Co@Zn-C)can be *** Co species was confirmed to have a positive impact on both the dielectric and magnetic response,while an appropriate amount of Zn hybridization in Co substance further enhanced the synergistic ef-fect between multiple loss mechanisms,promoting the minimum reflection loss and effective absorption bandwidth of Zn@Co-C reached-34.99 dB and 5.52 GHz(2.00 mm),***,this work re-veals the composition and construction dependency of bimetal hybrids on EMW absorption,which can be a strong reference for developing EMAs with diverse hybridization structures.

关键词： Hybridization Composition Construction Electromagnetic wave absorption