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Pseudo-random sequence generator based on the generalized Henon map

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The Journal of China Universities of Posts and Telecommunications 2008年第3期15卷 64-68页

作者： ZHENG Fan tian xiao-jian SONG jing-yi LI Xue-yan College of Electronic Science and Engineering Jilin University Changchun 130012 China

By analysis and comparison of several chaotic systems that are applied to generate pseudo-random sequence, the generalized Henon map is proposed as a pseudo-random sequence generator. A new algorithm is created to solve the problem of non-uniform distribution of the sequence generated by the generalized Henon map. First, move the decimal point of elements in the sequence to the fight; then, cut off the integer; and finally, quantify it into a binary sequence. Statistical test, security analysis, and the application of image encryption have strongly supported the good random statistical characteristics, high linear complexity, large key space, and great sensitivity of the binary sequence.

关键词： pseudo-random sequence chaos the generalized Henon map

基于JAK/STAT3通路探讨柚皮苷对人类风湿关节炎成纤维样滑膜细胞增殖与凋亡的影响及其作用机制

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现代免疫学 2024年第5期44卷 430-436页

作者：田晓静马丽李春梅黄佳珉南京中医药大学附属常州市中医医院检验科常州213000 南京中医药大学附属常州市中医医院风湿免疫科常州213000

基于JAK/STAT3通路探讨柚皮苷(naringin,NRG)对人类风湿关节炎成纤维样滑膜细胞(rheumatoid arthritis fibroblast-like synoviocytes,RA-FLS)增殖与凋亡的影响。分离RA患者的膝关节滑膜组织RA-FLS,免疫荧光法检查波形蛋白(vimentin)、CD90表达以鉴定细胞;将RA-FLS分为NC组(正常培养的RA-FLS)、NRG-L组(20μg/mL)、NRG-M组(40μg/mL)、NRG-H组(80μg/mL)、NRG-H+Coumermycin A1(JAK激活剂)组(80μg/mL NRG+10μmol/L Coumermycin A1)。CCK-8法检测RA-FLS增殖;Hoechst 33258染色检测细胞凋亡形态;流式细胞术检测RA-FLS凋亡;ELISA法检测RA-FLS培养上清液中IL-6、IL-1β、TNF-α水平;qRT-PCR检测RA-FLS中增殖细胞核抗原(proliferating cell nuclear antigen,PCNA)、Caspase-3 mRNA水平;Western blotting检测RA-FLS中PCNA、Caspase-3、p-JAK2、p-STAT3蛋白表达。结果显示,细胞呈梭形生长,且vimentin、CD90表达呈强阳性,证实分离的细胞为RA-FLS;与NC组比较,NRG-L组、NRG-M组、NRG-H组RA-FLS OD_(450)值(24、48h)、IL-6、IL-1β、TNF-α水平、PCNA mRNA及蛋白、p-JAK2、p-STAT3蛋白表达降低,亮染细胞数量、细胞凋亡率、Caspase-3 mRNA及蛋白表达升高,且呈剂量依赖性(P<0.05);与NRG-H组比较,NRG-H+Coumermycin A1组RA-FLS D(450 nm)值(24、48h)、IL-6、IL-1β、TNF-α水平、PCNA mRNA及蛋白、p-JAK2、p-STAT3蛋白表达升高,亮染细胞数量、细胞凋亡率、Caspase-3 mRNA及蛋白表达降低(P<0.05)。该研究表明,NRG可能通过抑制JAK/STAT3通路抑制RA-FLS增殖,促进凋亡。

关键词：柚皮苷类风湿关节炎滑膜成纤维细胞 Janus蛋白酪氨酸激酶/信号转导子与转录激活子3通路增殖凋亡

CIVB flashback analysis of hydrogen flame based on azimuthal vorticity at mixing zone exit

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Science China(Technological Sciences) 2014年第12期57卷 2466-2474页

作者： tian xiao jing XING Shuang Xi CUI Yu Feng FANG Ai Bing NIE Chao Qun Key Laboratory of Advanced Energy and Power Institute of Engineering Thermophysics Chinese Academy of Sciences University of Chinese Academy of Sciences

Swirl-premixed combustion systems exhibit potential to meet future regulations on pollution emissions. However, combustion induced vortex breakdown(CIVB) flashback is frequently observed in these systems, especially for high hydrogen content fuel. In this study, a swirl-premixed burner with diverging centerbody was used to investigate CIVB flashback based on azimuthal vorticity at mixing zone exit. Through 2D axisymmetric model, it was found that there was a maximal azimuthal vorticity at mixing zone exit for each equivalence ratio. The physical meaning of these maximal azimuthal vorticity values was the minimally required azimuthal vorticity to trigger CIVB flashback. At the same time, the required azimuthal vorticity declined with the increase of equivalence ratio since turbulent burning velocity started to control flashback. Nevertheless, azimuthal vorticity offered by heat release increased with the increase of equivalence ratio, which promoted flame propagating upstream continually.

关键词： azimuthal vorticity mixing zone exit premixed hydrogen flame CIVB flashback

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PP复合材料的性能研究

合成材料老化与应用 2024年第2期53卷 10-13页

作者：丁将敏王芳田敬晓刘艳丽国家能源集团宁夏煤业公司煤炭化学工业技术研究院宁夏银川750411􁽈

通过添加改性碳酸钙、POE、玻璃纤维、碳纤维研究其对PP复合材料性能的影响。研究表明:随着改性CaCO3含量的逐渐增加,PP复合材料的拉伸强度和冲击强度呈先增后减的趋势,改性CaCO3添加量为2%(wt.)时,拉伸强度为23.7MPa,冲击强度为17kJ·m... 详细信息

通过添加改性碳酸钙、POE、玻璃纤维、碳纤维研究其对PP复合材料性能的影响。研究表明:随着改性CaCO3含量的逐渐增加,PP复合材料的拉伸强度和冲击强度呈先增后减的趋势,改性CaCO3添加量为2%(wt.)时,拉伸强度为23.7MPa,冲击强度为17kJ·m^(-2);随着POE添加量的增加,复合材料的拉伸强度和弯曲模量降低,冲击强度增大,当POE添加量超过17%(wt.)时,冲击强度增幅减缓,综合力学性能及经济性,确定POE的添加量为17%~20%(wt.);添加玻璃纤维后,复合材料的拉伸强度、弯曲模量是增加的,冲击强度明显下降,但当玻璃纤维添加量为10%(wt.)以上,复合材料的拉伸强度和弯曲模量是逐渐增大的,冲击强度明显下降。通过复合材料冲击断面SEM表征发现:断面粗糙,有较多的片状结构,部分可见明显的“拉丝”形态,是典型的韧性断裂特征;玻璃纤维和碳纤维集束在树脂基体中随机取向分布,形成了足够的骨架网络,起到增强增韧作用。

关键词：聚丙烯玻璃纤维碳纤维

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妇科体检人群HPV感染分型、液基薄层细胞学检查及阴道微生态检查结果分析

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医师在线 2024年第6期14卷 7-11页

作者：马燕肖天婧张保华郑建贺魏小庆北京长阳妇儿门诊部检验科北京102442 北京迪安医学检验实验室北京102600

目的掌握妇科体检人群HPV感染状况、细胞学诊断及阴道微生态检查结果,发挥基层医疗门诊哨岗作用,以期为临床诊疗提供基础数据。方法样本来源于自愿接受检查的妇科体检人员,采集体检者子宫颈分泌物、脱落细胞及阴道分泌物,进行人乳头瘤病... 详细信息

目的掌握妇科体检人群HPV感染状况、细胞学诊断及阴道微生态检查结果,发挥基层医疗门诊哨岗作用,以期为临床诊疗提供基础数据。方法样本来源于自愿接受检查的妇科体检人员,采集体检者子宫颈分泌物、脱落细胞及阴道分泌物,进行人乳头瘤病毒(HPV)分型检测、液基薄层细胞学检查(TCT)及阴道微生态分析。结果HPV分型检测结果显示,体检人群中HPV感染分型检出率较高的前10位依次为HPV58、16、81、52、53、31、51、66、68、39、56型,以高危型感染为主;年龄分组比较显示,≤25岁组、26~35岁组、36~45岁组的HPV高危型感染阳性频次多于HPV低危型感染阳性频次,且差异有统计学意义(P<0.01)。TCT诊断分型有高级别鳞状上皮内病变(HSIL)、低级别鳞状上皮内病变(LSIL)、未明确诊断意义的不典型鳞状细胞(ASC-US)以及未见上皮内病变及恶性细胞等四种,其HPV阳性率差异具有统计学意义(P<0.01);HPV阳性者的HPV分型均以高危型为主;在75例TCT阳性病例中有15例(20%)感染HPV16、18型;HPV阳性者的阴道微生态异常比例较高(80.77%)。结论防治子宫颈癌应尽早接种疫苗、定期筛查、积极治疗三管齐下,子宫颈癌筛查作为二级预防措施应受到临床关注,并重视HPV高危型的筛查工作。

关键词： HPV感染分型液基薄层细胞学检查(TCT) 阴道微生态子宫颈癌筛查

Robust adaptive radar beamforming based on iterative training sample selection using kurtosis of generalized inner product statistics

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Journal of Systems Engineering and Electronics 2024年第1期35卷 24-30页

作者： tian jing ZHANG Wei School of Information and Electronics Beijing Institute of TechnologyBeijing 100081China National Key Laboratory of Electromagnetic Space Security Chengdu 610036China

In engineering application,there is only one adaptive weights estimated by most of traditional early warning radars for adaptive interference suppression in a pulse reputation interval(PRI).Therefore,if the training samples used to calculate the weight vector does not contain the jamming,then the jamming cannot be removed by adaptive spatial *** the weight vector is constantly updated in the range dimension,the training data may contain target echo signals,resulting in signal cancellation *** cope with the situation that the training samples are contaminated by target signal,an iterative training sample selection method based on non-homogeneous detector(NHD)is proposed in this paper for updating the weight vector in entire range *** principle is presented,and the validity is proven by simulation results.

关键词： adaptive radar beamforming training sample selection non-homogeneous detector electronic jamming jamming suppression

Quantum squeezing induced nonreciprocal phonon laser

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Science China(Physics,Mechanics & Astronomy) 2024年第6期67卷 20-30页

作者： tian-Xiang Lu Yan Wang Keyu Xia Xing xiao Le-Man Kuang Hui jing College of Physics and Electronic Information Gannan Normal UniversityGanzhou 341000China Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Department of Physics and Synergetic Innovation Center for Quantum Effects and ApplicationsHunan Normal UniversityChangsha 410081China Academy for Quantum Science and Technology Zhengzhou University of Light IndustryZhengzhou 450002China College of Engineering and Applied Sciences National Laboratory of Solid State Microstructuresand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210023China

Phonon lasers or coherent amplifications of mechanical oscillations are powerful tools for fundamental studies on coherent acoustics and hold potential for diverse applications,ranging from ultrasensitive force sensing to phononic information ***,we propose the use of an optomechanical resonator coupled to a nonlinear optical resonator for directional phonon *** find that by pumping the nonlinear optical resonator,directional optical squeezing can occur along the pump *** a result,we can achieve the directional mechanical gain using directional optical squeezing,thereby leading to nonreciprocal phonon lasing with a well-tunable directional power *** work proposes a feasible way to build nonreciprocal phonon lasers with various nonlinear optical media,which are important for a wide range of applications,such as directional acoustic amplifiers,invisible sound sensing or imaging,and one-way phononic networks.

关键词： nonreciprocal phonon laser directional quantum squeezing optomechanics

Martensitic transformation pathways and crystallographic orientation relationships in steel

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Journal of Materials Science & Technology 2024年第7期174卷 74-84页

作者： tian-Wei Liu xiao-Lei Wu State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of SciencesBeijing 100190China School of Engineering Science University of Chinese Academy of SciencesBeijing 100049China

Martensite is one of the most important structures determining the ability to tailor the performance of steel and several other engineering *** previous studies,the face-centered cubic(FCC)to hexag-onal close-packed(HCP)(or body-centered cubic(BCC))martensitic transformation and the FCC to body-centered tetragonal(BCT)(or BCC)martensitic transformation during deformation and quenching were widely investigated;these transformations usually improve the plasticity and strength of steel,*** this work,detailed transmission electron microscopy(TEM)observations and electron diffraction pattern analyses of the BCT and BCC twins are performed along the[110],[131],and[¯153]zone *** transformation of BCT twins into BCC twins along the[131]zone axis is also analyzed through in situ heating during the TEM *** high-resolution TEM observations of mutually perpendicular BCT variants are consistent with the atomic arrangement obtained for the quenching pathway during the martensitic *** addition,different orientation relationships between austenite and marten-site are explained in terms of the atomic migration occurring during the deformation pathway and the quenching pathway of the martensitic transformation.

关键词： Body-centered tetragonal twin Martensitic transformation Steel Transmission electron microscopy Orientation relationship

Numerical investigation on dynamic response of the screen mesh in vibrating screening through DEM-FEM co-simulation

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Particuology 2024年第4期87卷 205-217页

作者： Huan Zhang xiao Zheng Weimin jing Key Laboratory of MetallurgicalEquipment and Control Technology Ministry of EducationWuhan University of Science and TechnologyWuhan430081 China Hubei Key Laboratory of Mechanical Transmssion and Manufacturing Engineering Wuhan University of Science and TechnologyWuhan430081China College of Mechanical and Vehicle Engineering Chongqing UniversityChongqing400044China

Dynamic response of the screen mesh is of great significance in the optimum vibrating screen *** this paper,based on the DEM-FEM co-simulation method,the effect of screening parameters on the dynamic response of the screen mesh is explored and the mechanism is revealed on the particle ***,a virtual experiment on a linear vibrating screen was carried out to analyze the screening pa-rameters'effect with both impact load and sustained stress inflicted on the screen ***,the time-domain evolution regularity of the screen mesh LVA(Local Vibration Amplitude)under different particle plugging conditions was investigated based on the ***,the influence of screening parameters on LVA and its distribution was *** results show that the screening parameters can greatly affect the screen mesh LVA and its distribution by changing the movement of the granular material and the particle penetration probability,which provides an important basis for the optimal design of the screen mesh and its supporting structure.

关键词： Vibrating screen Dynamic response DEM-FEM Screening parameters Local vibration amplitude