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破片杀伤战斗部空爆状态下车顶夹芯板防护性能分析与优化设计

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兵工学报 2024年第1期45卷 69-84页

作者：傅耀宇贵新成周云波刘家志石昊王铮 63969部队江苏南京211113 南京理工大学机械工程学院江苏南京210094

在现代战争中,为实现远程精确打击,众多破片杀伤战斗部选择车辆顶部作为首选攻击位置,而目前国内外关于冲击波和破片联合作用下车辆顶部防护的研究基本没有。为提高特种车辆顶部防护性能并实现结构轻量化设计,通过北约一级替代装药爆炸... 详细信息

在现代战争中,为实现远程精确打击,众多破片杀伤战斗部选择车辆顶部作为首选攻击位置,而目前国内外关于冲击波和破片联合作用下车辆顶部防护的研究基本没有。为提高特种车辆顶部防护性能并实现结构轻量化设计,通过北约一级替代装药爆炸试验和破片飞散理论计算,验证了数值模拟的有效性和准确性。根据LS-DYNA软件分析结果数据和破片外弹道方程,采用Python软件等编写用于分析不同起爆高度下破片落点分布的解算处理程序。设计一种I-Y型夹芯板,并与另外5种不同结构夹芯板的防护性能进行综合比较,证明了该型板的优越性。进而以质量损失、能量吸收、背板峰值位移及破片速度分布为评价标准,研究炸药起爆方式、炸药相对位置、面板和背板厚度、夹芯层结构参数对I-Y型板防护性能的影响。选择面板厚度、背板厚度、夹芯层高度和胞元宽度为设计变量,以背板峰值位移和夹芯板质量为优化目标,用最优拉丁超立方试验方法进行采样,采用Kriging法构建代理模型,用非支配排序遗传算法进行多目标优化求解,并对最优解进行仿真验证,为冲击波和破片联合作用下车顶防护结构优化设计提供了支持。

关键词：预制破片飞散初速度 I-Y型夹芯板防护性能多目标优化

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A lightweight DDoS detection scheme under SDN context

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Cybersecurity 2023年第1期6卷 75-89页

作者： Kun Jia Chaoge liu Qixu liu Junnan Wang jiazhi liu Feng liu State Key Laboratory of Information Security Institute of Information EngineeringBeijingChina School of Cyber Security University of Chinese Acad emy of SciencesBeijing 100049China The Sixth Research Offce Institute of Information EngineeringChinese Academy of SciencesBeijing 100093China

Software-defined networking(SDN),a novel network paradigm,separates the control plane and data plane into dif-ferent network equipment to realize the flexible control of network *** excellent programmability and global view present many new *** detection under the SDN context is an important and challenging research *** previous works attempted to collect and analyze statistics related to flows,usually recorded in switches,to address DDoS *** contrast,other works applied machine learning-based solutions to identify DDos and achieved promising ***,most previous works need to periodically request flow rules or packets to obtain flow statistics or features to detect stealthy ***,the request for flow rules is very time-consuming and CPU-consuming;moreover may congest the communication channel between the controller and the ***,we present FORT,a lightweight DDoS detection scheme,which spreads the rule-based detection algorithm at edge switches and determines whether to start it by periodically retrieving the ports state.A time-series algorithm,ARIMA,is utilized to determine the port statistics adaptively,and an SVM algorithm is applied to detect whether a DDoS attack does *** experiments demonstrate that FORT can significantly reduce the controller load and provide a reliable detection *** to the false alarm rate of 1.24%in the comparison scheme,the false alarm rate of this scheme is only 0.039%,which significantly reduces the probability of false ***,by introducing the alarm mechanism,this scheme can reduce the load of the southbound chan-nel by more than 60%in the normal state.

关键词： DDoS Port monitoring Flow rule Software defined network MiniNet RYU controller Detection

Challenges and Countermeasures for the Sustainable Development of Local Finance under the Impact of COVID-19

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China Finance and Economic Review 2021年第1期10卷 117-128页

作者： Deyong Zhang jiazhi liu National Academy of Economic Strategy Chinese Academy of Social Sciences Graduate School University of Chinese Academy of Social Sciences

In recent years,the risks and challenges at home and abroad have increased significantly,and the downward pressure on the economy has increased,especially the implementation of larger-scale tax and fee cuts under the proactive fiscal policy,while the rigidity of local fiscal expenditure has not been reduced,and the sustainable development of local finance is facing greater *** particular,the COVID-19 pandemic has had a serious impact on the already stressed local finance,which has led to the intensifi ed contradiction between local fiscal revenue and *** paper analyzes the challenges to the sustainable development of local finance under the impact of COVID-19 from four angles:the greater economic downward pressure combined with larger-scale tax and fee cuts,the fiscal relationship between the central and local governments,land finance,and transfer payment,then puts forward the corresponding policy recommendations.

关键词： sustainable development of local finance tax and fee cuts fiscal and tax system reform land finance

Preparation of Peptide Selenoesters from Their Corresponding Acyl Hydrazides

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Chinese Journal of Chemistry 2021年第7期39卷 1861-1866页

作者： Yunxue Li jiazhi liu Qingqing Zhou Jie Zhao Ping Wang Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs School of Chemistry and Chemical EngineeringFrontiers Science Center for Transformative MoleculesShanghai Jiao Tong UniversityShanghai200240 China

Main observation and conclusion Selenoesters are useful substitutes for traditional thioesters in protein ligation chemistry due to their high reactivity in the trans-thio/selenoesterification ***,existing synthetic routes to access peptide selenoester require a selenoesterification reaction between a selenide and a protected peptide with a free carboxylate at the C-terminus.

关键词： Peptides Hydrazide Selenium Synthetic methods One-pot ligation

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细粒尾矿无土修复后土壤有机碳累积特性

矿冶 2024年第2期33卷 293-302页

作者：刘家治夏令汪之翔鲁子敬宋少先胡勇武汉理工大学资源与环境工程学院武汉430007 湖北三鑫金铜股份有限公司湖北黄石435102

铜等大宗尾矿无土化原位修复是尾矿资源化、无害化利用的有效途径。修复后土壤养分蓄积直接关系到后期田间管理,对其有机碳等重要养分积累规律研究至关重要。针对我国湖北某细粒铜尾矿修复场地进行研究,对未经修复、修复一年与修复两年... 详细信息

铜等大宗尾矿无土化原位修复是尾矿资源化、无害化利用的有效途径。修复后土壤养分蓄积直接关系到后期田间管理,对其有机碳等重要养分积累规律研究至关重要。针对我国湖北某细粒铜尾矿修复场地进行研究,对未经修复、修复一年与修复两年的0~15、15~30、30~45 cm三种深度的土壤进行取样,对总有机碳、易氧化态有机碳、颗粒态有机碳、矿物结合态有机碳、可溶性有机碳与微生物量有机碳6种土壤有机碳形态进行测定并分析其变化规律。结果表明:经无土修复后的细粒尾矿土在无外源有机物的添加下依然会进行土壤总有机碳的积累;尾矿进行有机碳积累的主要方式是以矿物结合态有机碳为代表的惰性有机碳的增加,惰性碳的升高有助于固定有机碳;尾矿的团聚体粒径尺寸与土壤总有机碳的含量呈正相关,其中惰性有机碳更偏好聚集在粒径较小的团聚结构中,土壤碳库活性逐渐增强,更容易发生有机碳的转化;对尾矿土进行修复后土壤有机碳含量有显著提高,且主要以惰性有机碳的形式积累,在该场地表现出了巨大的碳汇潜力。该研究同时明确了该场地修复后矿区土壤有机碳各形态的累积特性,可为指导尾矿修复工作提供数据支持。

关键词：尾矿原位修复有机碳修复土壤有机碳形态土壤团聚体碳积累有机碳组分

Revealing Functional Significance of Interleukin-2 Glycopro-teoforms Enabled by Expressed Serine Ligation

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Chinese Journal of Chemistry 2022年第7期40卷 787-793页

作者： Jie Zhao jiazhi liu Xinnan liu Qi Cao Hongbo Zhao Lizhen liu Farong Ye Can Wang Hong Shao Dongxiang Xue Houchao Tao Bin Li Biao Yu Ping Wang Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs School of Chemistry and Chemical EngineeringShanghai Jiao Tong University800 Dongchuan RoadShanghai 200240China Shanghai Institute of Immunology Department of Immunology and MicrobiologyShanghai Jiao Tong University School of Medicine280 S.Chongqing RoadShanghai 200025China Obstetrics and Gynecology Hospital of Fudan University Shanghai 200011China Shanghai Institute for Food and Drug Control NMPA Key Laboratory for Quality Control of Therapeutic Monoclonal AntibodiesShanghai 201203China iHuman Institute ShanghaiTech UniversityHaike Road 230Shanghai 200032China State Key Laboratory of Bioorganic and Natural Products Chemistry Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryChinese Academy of Sciences345 Lingling RoadShanghai 200032

Naturally occurring interleukin-2(IL-2)is a pleiotropic glycoprotein that regulates immune responses by controlling the differentia-tion and homeostasis of T ***-glycosylated IL-2 has been used in clinical settings for three ***,the function of the O-glycan of native IL-2 remains ***,to stress this issue,we report a highly efficient semi-synthesis of homogeneous glycosylated IL-2 with various glycoproteoforms on a multi-milligram *** glycopeptide fragment was prepared by chemical synthesis and then merged with recombinant fragment via a serine ligation to generate the desired glycoprotein in a single *** evaluation of the homogenous glycoprotein library reveals that the activity of IL-2 in activating individual T cell subset is glycan dependent,thus highlighting the possibility of further improving current clinical medicine.

关键词： Oligosaccharide Glycoprotein Serine ligation Interleukin-2 Glycopeptides

开放松解术联合桡骨远端固定铰链式外固定支架治疗肘关节僵硬

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中国修复重建外科杂志 2018年第2期32卷 134-138页

作者：刘家志陈帅范存义泰山医学院山东泰安271016 上海市第六人民医院东院骨科上海201306

目的探讨采用开放松解术联合桡骨远端固定铰链式外固定支架治疗肘关节僵硬的效果。方法采用临床随机对照研究,将2014年10月—2015年10月收治的77例因创伤导致的肘关节僵硬患者,按随机数字表法分为观察组(38例)和对照组(39例),观察组患... 详细信息

目的探讨采用开放松解术联合桡骨远端固定铰链式外固定支架治疗肘关节僵硬的效果。方法采用临床随机对照研究,将2014年10月—2015年10月收治的77例因创伤导致的肘关节僵硬患者,按随机数字表法分为观察组(38例)和对照组(39例),观察组患者行肘关节开放松解术联合桡骨远端固定铰链式外固定支架治疗,对照组患者行传统松解术治疗。两组患者性别、年龄、致伤原因、原始损伤诊断类型、受伤至手术时间、术前肘关节屈伸活动度、Mayo肘关节功能评分等一般资料比较差异均无统计学意义(P>0.05),具有可比性。术后采用肘关节屈伸活动度、Mayo肘关节功能评定标准评价功能恢复情况。结果术后两组患者切口均Ⅰ期愈合。观察组术后发生钉道感染1例,尺神经症状2例,肘关节异位骨化1例,肘关节中度疼痛1例;对照组术后发生钉道感染2例,尺神经症状2例,肘关节中度疼痛3例。两组患者均获随访,随访时间6周~12个月,平均6个月。两组末次随访时肘关节屈伸活动度及Mayo肘关节功能评分均较术前显著改善(P<0.05);末次随访时观察组肘关节屈伸活动度及Mayo肘关节功能评分均显著大于对照组(P<0.05)。末次随访时根据Mayo肘关节功能评分评价功能,观察组获优27例、良10例、中1例,优良率97.4%;对照组获优12例、良21例、中4例,差2例,优良率84.6%;两组优良率比较差异无统计学意义(P=0.108)。结论开放松解术联合桡骨远端固定铰链式外固定支架治疗创伤型肘关节僵硬能够显著改善肘关节功能,疗效优于传统松解术。

关键词：肘关节僵硬开放松解术桡骨远端固定铰链式外固定

Lithiophilic CoF_(2)@C hollow spheres towards spatial lithium deposition for stable lithium metal batteries

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Journal of Energy Chemistry 2024年第10期97卷 55-67,I0002页

作者： Jianxing Wang Shuhao Yao Runming Tao Xiaolang liu jiazhi Geng Chang Hong Huiying Li Guiyun Yu Haifeng Li Xiao-Guang Sun Jianlin Li Jiyuan Liang School of Optoelectronic Materials&Technology jianghan UniversityWuhan 430056HubeiChina Institute for Advanced Materials and Manufacturing University of TennesseeKnoxilTN 37996USA School of Chemistry&Chemical Engineering Yancheng Institute of TechnologyYancheng 224051JiangsuChina Chemical Sciences Division Oak Ridge National LaboratoryOak RidgeTN 37831USA Applied Materials Division Argonne National LaboratoryLemontIL 60439USA

Lithium metal(LM)is a promising anode for next-generation batteries due to its high theoretical capacity and low electrode ***,side reactions,volume change,and unwanted lithium dendrite growth seriously limit the practical application of ***,with the aid of a hard template approach,a novel lithiophilic CoF_(2)-carbon hollow sphere(CoF_(2)@C-HS)composite material is successfully prepared via a facile in-situ fluorination and etching *** lithiophilic CoF_(2) acts as nucleation sites to reduce nucleation overpotential as well as induces the spatial Li deposition and the formation of LiFrich solid electrolyte interphase(SEI),and the hollow carbon matrix can enhance the electrical conductivity and offer free space for LM *** simulations reveal that the synergistic effect of lithiophilic CoF_(2) and hollow carbon matrix homogenizes the electric field distribution and Li~+*** from these advantages,the CoF_(2)@C-HS-modified copper substrate electrode delivers an enhanced Coulombic efficiency(CE)of 93.7%for 280 cycles at 1 mA cm^(-2)and 1 mA h cm^(-2).The symmetrical cell using CoF_(2)@C-HS can stably cycle more than 1800 h with a low voltage hysteresis of 11 mV at a current density of 0.5 MA cm^(-2)and an areal capacity of 0.5 mA h cm^(-2).Moreover,the Li@CoF_(2)@C-HS composite anode enables more than 300 stable cycles at 1 C with a capacity retention of 95%in LiFePO_(4)-based full cell and 110 stable cycles at 1 C in LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811)-based highvoltage full *** work might shed a new light on designing lithiophilic hosts to spatially confine LM deposition,realizing dendrite-free LM anodes and the practical applications of LM batteries.

关键词： Lithium metal anode Spatial deposition Stability Nanocomposite Lithiophilic CoF_(2)

肘关节开放松解联合内固定取出术治疗创伤后肘关节僵硬

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中国修复重建外科杂志 2015年第7期29卷 826-830页

作者：蔡江瑜刘家志范存义上海交通大学附属第六人民医院骨科上海200233 泰山医学院上海市第六人民医院东院骨科

目的探讨肘关节开放松解联合内固定取出术治疗创伤后肘关节僵硬的安全性及疗效。方法回顾性分析2010年1月-2011年12月80例因肘关节僵硬行肘关节开放松解术患者临床资料,根据是否同时行内固定取出术分为两组,其中39例为无内固定组（A组）... 详细信息

目的探讨肘关节开放松解联合内固定取出术治疗创伤后肘关节僵硬的安全性及疗效。方法回顾性分析2010年1月-2011年12月80例因肘关节僵硬行肘关节开放松解术患者临床资料,根据是否同时行内固定取出术分为两组,其中39例为无内固定组（A组）,41例为同时行内固定取出术组（B组）。除原始损伤类型（P〈0.05）外,两组患者年龄、性别、侧别、伤后至该次入院时间、肘部僵硬程度和异位骨化严重程度等一般资料比较,差异均无统计学意义（P〉0.05）。比较两组术后尺神经症状、异位骨化复发及再骨折并发症发生情况,以及肘关节活动度、Mayo肘关节功能评分（MEPS）。结果两组患者均获随访,A组随访时间12~18个月,平均15.7个月;B组12~20个月,平均16.1个月。A组5例（12.8%）、B组4例（9.8%）出现尺神经症状,A组1例（2.6%）、B组1例（2.4%）异位骨化复发,B组1例（2.4%）发生再骨折;比较两组以上并发症发生率,差异均无统计学意义（P〉0.05）。两组末次随访肘关节活动度及Mayo肘关节功能评分（MEPS）均较术前显著增加（P〈0.05）;两组间末次随访时肘关节活动度比较差异无统计学意义（t=0.40,P=0.69）,但A组MEPS评分高于B组（t=2.36,P=0.02）。A组MEPS获优16例,良16例,可6例,差1例,优良率达82.1%;B组为优10例,良25例,可4例,差2例,优良率达85.4%;两组优良率比较,差异无统计学意义（χ……2=0.16,P=0.69）。结论肘关节松解联合内固定取出术治疗创伤后肘关节僵硬安全有效,但应注意预防再骨折等并发症的发生。

关键词：肘关节僵硬肘关节开放松解术内固定取出术再骨折