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Research on aiming methods for small sample size shooting tests of two-dimensional trajectory correction fuse

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Defence Technology（防务技术） 2024年第3期33卷 506-517页

作者： Chen Liang Qiang Shen Zilong Deng Hongyun Li wenyang Pu lingyun Tian Ziyang lin School of Mechatronical Engineering Beijing Institute of TechnologyBeijing 100081China

The longitudinal dispersion of the projectile in shooting tests of two-dimensional trajectory corrections fused with fixed canards is extremely large that it sometimes exceeds the correction ability of the correction fuse *** impact point easily deviates from the target,and thus the correction result cannot be readily ***,the cost of shooting tests is considerably high to conduct many tests for data *** address this issue,this study proposes an aiming method for shooting tests based on small sample *** proposed method uses the Bootstrap method to expand the test data;repeatedly iterates and corrects the position of the simulated theoretical impact points through an improved compatibility test method;and dynamically adjusts the weight of the prior distribution of simulation results based on Kullback-Leibler divergence,which to some extent avoids the real data being"submerged"by the simulation data and achieves the fusion Bayesian estimation of the dispersion *** experimental results show that when the simulation accuracy is sufficiently high,the proposed method yields a smaller mean-square deviation in estimating the dispersion center and higher shooting accuracy than those of the three comparison methods,which is more conducive to reflecting the effect of the control algorithm and facilitating test personnel to iterate their proposed structures and algorithms.;in addition,this study provides a knowledge base for further comprehensive studies in the future.

关键词： Two-dimensional trajectory correction fuse Small sample size test Compatibility test KL divergence Fusion bayesian estimation

A Flexible Voltage Control Strategy Based on Stage-division for Microgrids

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Protection and Control of Modern Power Systems 2024年第3期9卷 60-69页

作者： Yongjun Zhang Kaidong lin wenyang Deng Di Zhang Dongliang Xiao IEEE the South China University of Technology GuangzhouChina the Department of Electric Power South China University of TechnologyGuangzhouChina the School of Electric Power South China University of TechnologyGuangzhou 510640China

The occurrence of power flow reversal and off-limit of the voltage on common bus becomes more frequent because of the increasing penetration of renewable energy sources(RES)in *** guarantee the safe and stable operation,adjusting the power output of RES-based inverters to avoid the off-limit voltage is *** the apparent power characteristics of inverters,as well as the minimum participation of active power,a voltage control strategy based on stage division to be within the voltage limit is investigated in this *** the case of unknown demand and distribution of loads,the proposed control strategy is able to make full use of the apparent power to regulate voltage using simple calculations,while the performance in economical operation is *** results prove the effectiveness of the proposed method on the common bus off-limit voltage adjustment.

关键词： Off-limit voltage microgrids voltage control inverter stage division

Consumer-branch Connectivity Identification of Low Voltage Distribution Networks Based on Data-driven Approach

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Protection and Control of Modern Power Systems 2024年第4期9卷 69-82页

作者： Yongjun Zhang Yingqi Yi wenyang Deng Siliang Liu Lai Zhou Kaidong lin Yongzhi Cai the School of Electric Power Engineering and Guangdong Key Laboratory of Clean Energy Technology South China Uni-versity of TechnologyGuangzhou 510641China the School of Elec-tric Power Engineering South China University of TechnologyGuangzhou 510641China the Guangzhou Panyu vocational and technical college Guangzhou 511483China the Metrology Center Guangdong Power Company Grid Qingyuan 511500China

Accurate topological information is crucial in supporting the coordinated operational requirements of source-load-storage in low-voltage distribution *** coverage of smart meters provides a database for low-voltage topology identification(LVTI).However,because of electricity theft,power line commu-nication crosstalk,and interruption of communication,the measurement data may be *** can seriously affect the performance of LVTI ***,this paper defines hidden errors and proposes an LVTI method based on layer-by-layer stepwise *** the first step,a multi-linear regression model is developed for consumer-branch connectivity identification based on the energy conservation *** the second step,a significance factor based on the t-test is proposed to modify the identification results by considering the hidden *** the third step,the regression model and significance threshold parameters are iteratively updated layer by layer to improve the recall rate of the final identification ***,simulations of a test system with 63 users are carried out,and the practical application results show that the proposed method can guarantee over 90%precision under the influence of hidden errors.

关键词： Data driven hidden error linear re-gression low voltage distribution network topology identification

A novel beta-galactose-specific lectin of the tubeworm,Ridgeia piscesae,from the hydrothermal vent

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Acta Oceanologica Sinica 2017年第6期36卷 61-67页

作者： RUAN lingwei XU Haipeng lin wenyang SHI Hong CUI Zhizhong XU Xun State Key Laboratory Breeding Base of Marine Genetic Resources Xiamen 361005China Key Laboratory of Marine Genetic Resources of State Oceanic Administration Third Institute of OceanographyState Oceanic AdministrationXiamen 361005China Fujian Key Laboratory of Marine Genetic Resources Xiamen 361005China Animal Science and Technology College Shandong Agricultural UniversityTai'an 271018China

Lectins are sugar-specific binding proteins or glycoproteins that play important physiological roles in cellular recognition and regulation. And they are also valuable in medicine and pharmacy. Tubeworm is the representative species around the hydrothermal vent in the deep sea. They have developed unique mechanisms to adapt to the harsh environment. In this study, a 1 092 bp cDNA, designed as rpgal, was first cloned and characterized from the tubeworm Ridgeia piscesae. Sequence analysis showed that RPGAL had low homology with the known galectin. And it had two homologous carbohydrate-recognition domains, which is the characteristic of the tandem-repeat type galectins. The RPGAL was successfully recombinant expressed in Escherichia coli and purified. Analysis of biological activity revealed that RPGAL was metal ion independent and it could agglutinate all the vertebrate erythrocytes tested. It was stable at 10-50℃ and pH 5-10. And the hemagglutinating activity of RPGAL was strongly inhibited by D-Lactose and lipopolysaccharide. Although RPGAL had no effect on the microorganisms tested, it showed anti-tumor activity towards HeLa cells and HT1080 cells, which was accomplished by apoptosis. The study demonstrated that RPGAL was a novel galectin and provided a potential candidate for therapy of anti-tumor.

关键词： galectin antitumor apoptosis tubeworm Ridgeia piscesae

创伤性脑损伤大鼠神经炎症和铁死亡的变化及干预效果

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中华实验外科杂志 2023年第12期40卷 2507-2510页

作者：赵培超聂向飞尹凯胡岩林文阳郑州大学第一附属医院神经外科郑州450000

目的探讨创伤性脑损伤大鼠神经炎症和铁死亡的变化及铁死亡抑制剂去铁胺的干预效果。方法30至SD大鼠随机数字表格法分为对照组、模型组和去铁胺组,每组10只。模型组和去铁胺组大鼠采用Feeney自由落体法建立创伤性脑损伤模型。建模成功后... 详细信息

目的探讨创伤性脑损伤大鼠神经炎症和铁死亡的变化及铁死亡抑制剂去铁胺的干预效果。方法30至SD大鼠随机数字表格法分为对照组、模型组和去铁胺组,每组10只。模型组和去铁胺组大鼠采用Feeney自由落体法建立创伤性脑损伤模型。建模成功后,去铁胺组大鼠建模前2 h腹腔注射去铁胺100 mg/kg,对照组和模型组大鼠腹腔注射等体积生理盐水。采用改良神经功能缺损评分(mNSS)评估大鼠神经功能;采用干事比重法测定脑组织水肿情况;采用酶联免疫吸附试验(ELISA)分析脑组织中肿瘤坏死因子-α(TNF-α)、白细胞介素-1β(IL-1β)和白细胞介素-6(IL-6)的表达水平;生物化学酶法测定脑组织采用蛋白质免疫应激分析谷胱甘肽和铁离子水平;采用蛋白质免疫印迹分析铁死亡相关蛋白表达水平。组间比较采用单因素方差分析。结果去铁胺组大鼠神经功能缺损评分(5.80±1.14)明显低于模型组(10.20±1.55),差异有统计学意义(t=7.244,P<0.05)。去铁胺组大鼠神经功能缺损评分[(74.52±5.71)分]明显低于模型组大鼠[(87.20±3.71)分],差异有统计学意义(t=5.886,P<0.05)。去铁胺组大鼠脑组织铁离子[(0.19±0.02)mg/g]明显低于模型组[(0.27±0.01)mg/g],差异有统计学意义(t=10.36,P<0.05)。去铁胺组大鼠大鼠脑组织MDA水平[(8.61±0.49)nmol/g]明显低于模型组[(14.44±1.98)nmol/g],差异有统计学意义(t=9.045,P<0.05)。去铁胺组大鼠脑组织GSH水平[(16.23±1.37)U/g]明显低于模型组[(9.02±1.16)U/g],差异有统计学意义(t=12.330,P<0.05)。去铁胺组大鼠脑组织炎性因子TNF-α、IL-1β和IL-6[(50.49±5.44)、(40.17±3.34)、(48.60±8.59)pg/g]明显低于模型组[(85.91±6.86)、(64.58±6.48)、(72.78±9.48)pg/g],差异有统计学意义(t=12.790、10.590、5.978,P均<0.05)。去铁胺组大鼠脑组织铁死亡相关蛋白SLC7A11、FTH1和GPX4(0.40±0.07、0.46±0.09、0.40±0.05)明显高于模型组(0.73±0.05、0.68±0.06、0.66±0.06),差异有统计学意义(t=11.620、6.339、10.620,P均<0.05)。结论创伤性脑损伤大鼠神经炎性因子和铁死亡水平显著增加,铁死亡抑制剂去铁胺处理可显著抑制神经炎症和铁死亡,改善大鼠神经功能障碍。

关键词：创伤性脑损伤神经炎症铁死亡

敲减核苷酸交换因子SIL1的表达抑制肿瘤蛋白53突变型胶质瘤细胞迁移和干细胞特性

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中华实验外科杂志 2022年第7期39卷 1310-1313页

作者：吴力新宋振宇朱旭强林文阳郑州大学第一附属医院神经外科 450052

目的探究胶质瘤中核苷酸交换因子SIL1(SIL1)与肿瘤蛋白53(TP53)的关系,观察敲减SIL1对TP53突变型胶质瘤细胞增殖、迁移和干细胞特性的影响。方法实时荧光定量聚合酶链反应(RT-qPCR)和蛋白质印迹法(Western blot)检测TP53突变型胶质瘤细... 详细信息

目的探究胶质瘤中核苷酸交换因子SIL1(SIL1)与肿瘤蛋白53(TP53)的关系,观察敲减SIL1对TP53突变型胶质瘤细胞增殖、迁移和干细胞特性的影响。方法实时荧光定量聚合酶链反应(RT-qPCR)和蛋白质印迹法(Western blot)检测TP53突变型胶质瘤细胞系SW1088、U-118 MG和TP53野生型细胞系U87中SIL1 mRNA和蛋白表达的差异;在U-118 MG细胞中转染野生型TP53过表达质粒,Western blot检测TP53和SIL1蛋白表达变化。然后将U-118 MG细胞随机分成3组,对照组(不进行任何处理)、对照短发卡RNA(shRNA)组(转染对照shRNA质粒)和Sh-SIL1组(转染Sh-SIL1质粒)。细胞计数试剂盒(CCK-8)和克隆形成实验检测细胞增殖情况;Transwell检测细胞迁移;Western blot检测干细胞特性相关基因OCT4和CD133的表达。多组间差异比较采用单因素方差分析,两组间差异比较采用t检验。结果SW1088和U-118 MG细胞中SIL1 mRNA和蛋白水平均高于U87细胞(SIL1 mRNA:2.16±0.19比1.00±0.06,t=9.804,P<0.01;3.51±0.24比1.00±0.06,t=17.350,P<0.01。SIL1蛋白:0.52±0.06比0.16±0.07,t=7.315,P<0.01;1.16±0.11比0.16±0.07,t=13.680,P<0.01)。在U-118 MG细胞中转染野生型TP53过表达质粒后,TP53蛋白表达高于空载体组(2.00±0.13比0.15±0.06,t=21.950,P<0.01),而SIL1蛋白表达低于空载体组(0.07±0.01比0.24±0.03,t=9.128,P<0.01)。Sh-SIL1组中SIL1蛋白水平(0.05±0.03比0.36±0.04,t=9.539,P<0.01),细胞活力(t48=8.317,P<0.01;t72=10.310,P<0.01),克隆形成数目(115±9比167±15,t=4.997,P<0.01),迁移细胞数目(31.33±4.16比67.33±7.51,t=7.265,P<0.01),OCT4(0.25±0.04比0.61±0.05,t=9.227,P<0.01)和CD133(0.09±0.02比0.35±0.03,t=11.960,P<0.01)蛋白表达均低于对照shRNA组。结论SIL1在TP53突变的胶质瘤细胞中表达增加,野生型TP53可抑制SIL1的表达。在TP53突变的胶质瘤细胞中敲减SIL1可抑制细胞增殖、迁移和干细胞特性。

关键词：核苷酸交换因子SIL1 肿瘤蛋白53 胶质瘤迁移干细胞

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低独木桥在初中生短跑教学中应用的实验研究

南平师专学报 2002年第4期21卷 113-114,123页

作者：林文扬永春第三中学福建永春363000

将低独木桥引进初中短跑教学 ,可以有效地激发学生的练习兴趣 ,提高学生的奔跑速度。

关键词：初中生独木桥速度实验研究

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基于能量信息协同调控的LED智能调光技术

电气工程学报 2024年第1期19卷 196-205页

作者：尚文洋王睿驰林征宇吴建德何湘宁南京师范大学电气与自动化工程学院南京210023 拉夫堡大学机械、电器和制造学院拉夫堡LE113TU英国浙江大学电气工程学院杭州310027

针对当前LED照明系统对智能化的迫切需求和对成本的高度敏感,而现有智能化调控方案在成本和可靠性等方面存在不足等问题,提出一种基于电力电子变换器能量信息协同调控的LED智能调光技术。该技术基于电力电子变换器驱动的LED线性调光照... 详细信息

针对当前LED照明系统对智能化的迫切需求和对成本的高度敏感,而现有智能化调控方案在成本和可靠性等方面存在不足等问题,提出一种基于电力电子变换器能量信息协同调控的LED智能调光技术。该技术基于电力电子变换器驱动的LED线性调光照明系统,采用四进制差分相移键控(Quaternary differential phase shift keying,QDPSK)对公共直流母线上的开关纹波进行信息调制,从而在不额外增加硬件成本的条件下,实现四进制数字信号的调制、耦合与传输。从通信视角解构了DC/DC变换器的基本工作原理,揭示了LED调光系统中能量信息协同调控的实现方法,并以隧道LED照明系统的智能调光为例,围绕系统结构、通信协议、噪声干扰、通信速率等方面展开了具体分析。最后,搭建试验平台验证了所提方法的可行性。

关键词： LED智能调光能量信息复合调制 QDPSK调制 DC/DC变换器

浙江沿海某区域水库群联网联调水资源配置研究

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中国水利 2021年第4期 26-28页

作者：周焕林文扬浙江省水利水电勘测设计院杭州310002 浙江同济科技职业学院杭州311231

利用MIKE HYDRO模型搭建浙江沿海某区域水库群联网联调水资源配置模型,综合考虑现有工程、规划工程及经济投资效益等因素,给出区域水资源配置效益和效率较优方案。选取区域人口密集、工业经济发达,但近年用水矛盾逐渐突出,用水关系也发... 详细信息

利用MIKE HYDRO模型搭建浙江沿海某区域水库群联网联调水资源配置模型,综合考虑现有工程、规划工程及经济投资效益等因素,给出区域水资源配置效益和效率较优方案。选取区域人口密集、工业经济发达,但近年用水矛盾逐渐突出,用水关系也发生改变。成果可用于指导研究区域水资源配置工程的规划和建设,同时可为沿海其他地区水资源联网联调、区域水资源开发利用提供技术借鉴,从而促进区域经济社会可持续发展。

关键词： MIKE HYDRO 水库群联网联调优化模拟沿海区域