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An improved de-interleaving algorithm of radar pulses based on SOFM with self-adaptive network topology

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Journal of Systems Engineering and Electronics 2020年第4期31卷 712-721页

作者： JIANG Wen FU Xiongjun CHANG Jiayun qin rui School of Information and Electronics Beijing Institute of TechnologyBeijing 100081China

As a core part of the electronic warfare(EW) system,de-interleaving is used to separate interleaved radar signals. As interleaved radar pulses become more complex and denser, intelligent classification of radar signals has become very important. The self-organizing feature map(SOFM) is an excellent artificial neural network, which has huge advantages in intelligent classification of complex data. However, the de-interleaving process based on SOFM is faced with the problems that the initialization of the map size relies on prior information and the network topology cannot be adaptively adjusted. In this paper, an SOFM with self-adaptive network topology(SANT-SOFM) algorithm is proposed to solve the above problems. The SANT-SOFM algorithm first proposes an adaptive proliferation algorithm to adjust the map size, so that the initialization of the map size is no longer dependent on prior information but is gradually adjusted with the input data. Then,structural optimization algorithms are proposed to gradually optimize the topology of the SOFM network in the iterative process,constructing an optimal SANT. Finally, the optimized SOFM network is used for de-interleaving radar signals. Simulation results show that SANT-SOFM could get excellent performance in complex EW environments and the probability of getting the optimal map size is over 95% in the absence of priori information.

关键词： de-interleaving self-organizing feature map(SOFM) self-adaptive network topology(SANT)

Night-time radiative warming using the atmosphere

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Light(Science & Applications) 2023年第12期12卷 2589-2596页

作者： Yining Zhu Yiwei Zhou Bing qin rui qin Min Qiu Qiang Li State Key Laboratory of Modern Optical Instrumentation College of Optical Science and EngineeringZhejiang UniversityHangzhou 310027China Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province School of EngineeringWestlake UniversityHangzhou 310024China Institute of Advanced Technology Westlake Institute for Advanced StudyHangzhou 310024China

Night-time warming is vital for human production and daily *** methods like active heaters are energy-intensive,while passive insulating films possess restrictions regarding space consumption and the lack of heat *** this work,a nanophotonic-based night-time warming strategy that passively inhibits thermal radiation of objects while actively harnessing that of atmosphere is *** using a photonic-engineered thin film that exhibits high reflectivity(~0.91)in the atmospheric transparent band(8-14μm)and high absorptivity(~0.7)in the atmospheric radiative band(5-8 and 14-16μm),temperature rise of 2.1℃/4.4℃compared to typical low-e film and broadband absorber is ***,net heat loss as low as 9Wm-2 is experimentally observed,compared to 16 and 39Wm-2 for low-e film and broadband absorber,*** strategy suggests an innovative way for sustainable warming,thus contributes to addressing the challenges of climate change and promoting global carbon neutrality.

关键词： passive radiative absorber

Littlewood Paley g-function on the Heisenberg Group

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Acta Mathematica Sinica,English Series 2006年第1期22卷 95-100页

作者： He Ping LIU rui qin MA LMAM School of Mathematical Sciences Peking University Beijing 100871 P. R. China

We consider the g-function related to a class of radial functions which gives a characterization of the L^p-norm of a function on the Heisenberg group.

关键词： Heisenberg group g-function

Surface effects on the thermal conductivity of silicon nanowires

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Chinese Physics B 2018年第3期27卷 72-79页

作者： Hai-Peng Li rui-qin Zhang School of Physical Science and Technology China University of Mining and TechnologyXuzhou 221116China Department of Physics City University of Hong KongHong Kong SARChina

Thermal transport in silicon nanowires(SiNWs)has recently attracted considerable attention due to their potential applications in energy harvesting and generation and thermal *** adjustment of the thermal conductivity of SiNWs through surface effects is a topic worthy of *** this paper,we briefly review the recent progress made in this field through theoretical calculations and *** come to the conclusion that surface engineering methods are feasible and effective methods for adjusting nanoscale thermal transport and may foster further advancements in this field.

关键词： silicon nanowires thermal conductivity phonon transport surface effect

Value of cystatin C in predicting atrial fibrillation recurrence after radiofrequency catheter ablation

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Journal of Geriatric Cardiology 2018年第12期15卷 725-731页

作者： Li-Li JIN Ling YOU rui-qin XIE Department of Cardiology the Second Hospital of Hebei Medical UniversityShijiazhuangChina

Backgroud Recent studies have demonstrated that cystatin C is a valuable risk marker for cardiovascular disease morbidity and ***,we hypothesized that the pre-ablation cystatin C level was associated with post-ablation atrial fibrillation(AF)*** 207 patients were enrolled and completed in this prospective observational *** with AF scheduled for receive radiofrequency catheter ablation(RFCA)therapy were screened for the *** ablation therapy,electrocardiogram,24 h holter monitor,transesophageal echocardiography,serum cystatin C,high-sensitivity C-reactive protein,creatinine levels,and routine blood examinations were *** ablation,patients were followed up every week for the first month,and then at 2,3,6,9,and 12 ***,patients came back to out-patient clinic every six months *** or 24 h holter monitor were repeated if the patient experienced palpitations or every six *** recurrence was defined as atrial flbrillation/atrial flutter or atrial tachycardia lasting≥30 seconds within three months after *** Compared to patients with no AF recurrence,patients with recurrence had longer AF history(P=0.007),more early recurrence(P=0.000),a larger left atrium(P=0.004),and higher pre-ablation cystatin C levels(P=0.000).Multivariate regression analysis revealed that cystatin C and left atria(LA)diameter were risk factors for AF *** adjusting for LA diameter,the risk of AF recurrence increased 30%with every milligram cystatin C elevation(95%CI:1.117-1.523).Conclusions Pre-ablation cystatin C levels were associated with AF recurrence after RFCA therapy,an optimal cut-off value of 1.190 mg/L(sensitivity=0.576;specificity=0.851).

关键词： Atrial fibrillation Catheter ablation Cystatin C Recurrence

BOPl Silencing Suppresses Gastric Cancer Proliferation through p53 Modulation

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Current Medical Science 2021年第2期41卷 287-296页

作者： Yu-peng YANG rui-huan qin Jun-jle ZHAO Xin-yu qin Department of General Surgery Zhongshan HospitalFudan UniversityShanghai 200032China Chinese Institute for Brain Research Beijing 102206China

Block of proliferation 1(BOP1)is a key protein involved in ribosome maturation and affects cancer ***,its role in gastric cancer(GC)remains *** study aimed to explore the expression of BOPI in GC and its potential mechanisms in regulating GC growth,and the relationship between BOP1 level in cancer tissues and survival was also *** expression of BOPI was examined by immunohistochemistry(IHC)in a cohort containing 387 patients with primary *** GC cells were treated by siRNA to knock down the BOP1 expression,and examined by CCK-8 assay and plate clone formation to assess cell proliferation in *** rate of cultured GC cells was detected by flow cytometry with double staining of AnnxinV/*** xenografted mouse model was used to assess GC cell proliferation in *** blot and IHC were also performed to detect the expression levels of BOP1,p53 and *** with higher level of BOP1 in cancer tissues had significantly poorer ***1 silencing signifcantly suppressed GC cell proliferation both in vitro and in *** blocked cell cycle at G0/G1 phase and led to apoptosis of GC cells via upregulating p53 and ***1 silencing-induced suppression of cell proliferation was partly reversed by pifithrin-a,(a p53 inhibitor).Our study dermonstrated that BOP1 up-regulation may be a hallmark of GC and it may regulate proliferation of GC cells by activating ***1 might be considered a novel biomarker of GC proliferation,and could be a potential indicator of prognosis of GC ***1 might also be a potential target for the treatment of GC patients if further researched.

关键词： gastric cancer block of proliferation 1 cell proliferation p53

Comparative analysis of A,B,C and D genomes in the genus Oryza with C_(0)t-1 DNA of C genome

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Chinese Science Bulletin 2006年第14期51卷 1710-1720页

作者： LAN Weizhen qin rui LI Gang HE Guangcun Key Laboratory of State Ethnic Affairs Commission for BiologicalTechnology College of Life Sciences South-Central University forNationalities Wuhan 430074 China Key Laboratory of Ministry of Education for Plant DevelopmentalBiology College of Life Sciences Wuhan University Wuhan 430072China

Fluorescence in situ hybridization (FISH)was applied to somatic chromosomes preparations of Oryza officinalis Wall. (CC), O. sativa L. (AA)×O. offi-cinalis F1 hybrid (AC), backcross progenies BC1 (AAC and ACC), O. latifolia Desv. (CCDD), O. alta Swallen (CCDD) and O. punctata Kotschy (BBCC) with a labelled probe of C0t-1 DNA from O. officinalis. In O. officinalis, the homologous chromosomes showed similar signal bands probed by C0t-1 DNA and karyotype analysis was conducted based on the band patterns. Using no blocking DNA, the probe identified the chromosomes of C genome clearly, but detected few signals on chromosomes of A genome in the F1 hybrid and two backcross progenies of BC1. It is obvious that the highly and moderately repetitive DNA sequences were considerably different between C and A genomes. The chromosomes of C genome were also discriminated from the chromosomes of D- and B-genome in the tetraploid species O. latifolia, O. alta and O. punctata by C0t-1 DNA-FISH. Compari-son of the fluorescence intensity on the chromo-somes of B, C and D genomes in O. latifolia, O. alta, and O. punctata indicated that the differentiations between C and D genomes are less than that be-tween C and B genomes. The relationship between C and D genomes in O. alta is closer than that of C and D genomes in O. latifolia. This would be one of thecauses for the fact that both the genomes are of the same karyotype (CCDD) but belong to different spe-cies. The above results showed that the C0t-1 DNA had a high specificity of genome and species. In this paper, the origin of allotetraploid in genus Oryza is also discussed.

关键词： Cot-1 DNA 染色体基因组原位杂交水稻

Synthesis and Crystal Structure of a Genistein-derived Compound

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Chinese Journal of Structural Chemistry 2008年第2期27卷 200-204页

作者： ZHANG Li-N SHI Lei FANG rui-qin ZHU Hai-Liang School of Life Sciences Nanjing University Nanjing 210093 China

A genistein derivative, 5-hydroxy-3-（4-hydroxyphenyl）-7-（2-（piperidin- 1-yl）ethoxy）- 4H-chromen-4-one 3, was designed, prepared and structurally characterized by single-crystal X-ray diffraction. X-ray structure analysis reveals that 3 crystallizes in the orthorhombic system, space group Pbca, with a = 16.238（3）, b = 10.308（2）, c = 22.987（5）A, V = 3847.6（13）A3, Z = 8,μ= 0.093 mm^-1, Dc = 1.317 g/cm^3, F（000） = 1616, R = 0.0789 and wR = 0.1554 for 1463 observed reflections with I 〉 2σ（I）.

关键词： genistein crystal structure derivative 1,2-dibromoethane piperidine

Traversing the singularity hypersurface by applying the input disturbances to 6-SPS parallel manipulator

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第11期9卷 1539-1551页

作者： Yu-tong LI Yu-xin WANG Shuang-xia PAN rui-qin GUO College of Mechanical Engineering and Energy Zhejiang University Hangzhou 310027 China Department of Mechanical Engineering Tongji University Shanghai 200092 China

The singular points of a 6-SPS Stewart platform are distributed on the multi-dimensional singularity hypersurface in the task-space, which divides the workspace of the manipulator into several singularity-free regions. Because of the motion un- certainty at singular points, while the manipulator traverses this kind of hypersurface from one singularity-free region to another, its motion cannot be predetermined. In this paper, a detailed approach for the manipulator to traverse the singularity hypersurface with its non-persistent configuration is presented. First, the singular point transfer disturbance and the pose disturbance, which make the perturbed singular point transfer horizontally and vertically, respectively, are constructed. Through applying these disturbances into the input parameters within the maximum loss control domain, the perturbed persistent configuration is transformed into its corresponding non-persistent one. Under the action of the disturbances, the manipulator can traverse the singularity hypersurface from one singularity-flee region to another with a desired configuration.

关键词： Parallel manipulator Singularity hypersurface Singularity-free moving region