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| 1 | Polyphase orthogonal sequences design for opportunistic array radar via HGA显示文摘Opportunistic array radar(OAR) is a new generation radar system based on the stealth of the platform,which can improve the modern radar performance effectively.Designing the orthogonal code sets with low autocorrelation and cross-correlation is a key issue for OAR.This paper proposes a novel hybrid genetic algorithm(HGA) and designs the polyphase orthogonal code sets with low autocorrelation and cross-correlation properties,which can be used in the OAR system.The novel algorithm combines with simulated annealing(SA) and genetic algorithm(GA),adds in keeping best individuals and competition in small scope,and introduces grey correlation evaluation to evaluate fitness function. These avoid the premature convergence problem existed in GA and enhance the global searching capability.At last,the genetic results are optimized to obtain the best solution by using greedy algorithm.The simulation results show that the proposed algorithm is effective for the design of orthogonal phase signals used in OAR systems. | Shufeng Gong Weijun Long Hao Huang De Ben Minghai Pan | 2013 | Journal of Systems Engineering and Electronics2013，24，1： | 9 |
| 2 | Cystathionine-γ-lyase ameliorates the histone demethylase JMJD3-mediated autoimmune response in rheumatoid arthritis显示文摘Cystathionine-γ-lyase(CSE),an enzyme associated with hydrogen sulfide(H2S)production,is an important endogenous regulator of inflammation.Jumonji domain-containing protein 3(JMJD3)is implicated in the immune response and inflammation.Here,we investigated the potential contribution of JMJD3 to endogenous CSE-mediated inflammation in rheumatoid arthritis(RA).Upregulated CSE and JMJD3 were identified in synovial fibroblasts(SFs)from RA patients as well as in the joints of arthritic mice.Knocking down CSE augmented inflammation in IL-1β-induced SFs by increasing JMJD3 expression.In addition,CSE−/−mice with collagen-induced arthritis(CIA)developed severe joint inflammation and bone erosion.Conversely,overexpressing CSE inhibited JMJD3 expression by the transcription factor Sp-1 and was accompanied by reduced inflammation in IL-1β-treated SFs.Furthermore,JMJD3 silencing or the administration of the JMJD3 inhibitor GSK-J4 significantly decreased the inflammatory response in IL-1β-treated SFs,mainly by controlling the methylation status of H3K27me3 at the promoter of its target genes.GSK-J4 markedly attenuated the severity of arthritis in CIA mice.In conclusion,suppressing JMJD3 expression by the transcription factor Sp-1 is likely responsible for the ability of CSE to negatively modulate the inflammatory response and reduce the progression of RA. | Weijun Wu Ming Qin Wanwan Jia Zheng Huang Zhongzheng Li Di Yang Mengwei Huang Chenxi Xiao Fen Long Jianchun Mao Philip K.Moore Xinhua Liu Yi Zhun Zhu | 2019 | Cellular & Molecular Immunology2019，16，8： | 9 |
| 3 | Numerical Simulation of Multi-track and Multi-layer Temperature Field on Laser Direct Metal Shaping显示文摘To improve the mechanical properties of the parts fabricated by Laser Direct Metal Shaping(LDMS),it is of great significance to understand the distribution regularities of transient temperature field during LDMS process.Based on the“el- ement birth and death”technique of finite element method,a three-dimensional multi-track and multi-layer model for the transient temperature field analysis of LDMS is developed by ANSYS Parametric Design Language(APDL)for the first time.In the fab- ricated modal,X-direction parallel reciprocating scanning paths is introduced.Using the same process parameters,the simulation results show good agreement with the microstructure features of samples which fabricated by LDMS. | LONG Risheng~(1,2) LIU Weijun~1 (1.Advanced Manufacture Lab,Shenyang Institute of Automation,Shenyang 110016,China, 2.Graduate School,Chinese Academy of Sciences,Beijing 100039,China) | 2006 | 武汉理工大学学报2006，28，S3： | 8 |
| 4 | Numerical Simulation of Transient Thermal Stress Field for Laser Metal Deposition Shaping显示文摘To decrease thermal stress during laser metal deposition shaping(LMDS)process,it is of great importance to learn the transient thermal stress distribution regularities.Based on the“element life and death”technique of finite element analy- sis(FEA),a three-dimensional multi-track and multi-layer numerical simulation model for LMDS is developed with ANSYS parametric design language(APDL)for the first time,in which long-edge parallel reciprocating scanning paths is introduced. Through the model,detailed simulations of thermal stress during whole metal cladding process are conducted,the generation and distribution regularities of thermal stress are also discussed in detail.Using the same process parameters,the simulation results show good agreement with the features of samples which fabricated by LMDS. | LONG Risheng~(1,2) LIU Weijun~1 (1.Advanced Manufacture Lab,Shenyang Institute of Automation,Shenyang 110016,China 2.Graduate School,Chinese Academy or Sciences,Beijing 100039,China) | 2006 | 武汉理工大学学报2006，28，S3： | 3 |
| 5 | Effects of tillage managements and maize straw returning on soil microbiome using 16S rDNA sequencing显示文摘Agricultural practices could affect bacterial diversity and community structure by altering soil physical and chemical properties. Straw returning and tillage practices are widely used in agriculture, however, the effects of these agricultural practices on microbiomes are still unclear. In the present study, we compared the 18 bacterial communities of soil with different straw returning and tillage treatment combinations. The V3-V4 regions of the 16S ribosomal RNA were amplified and analyzed by high-throughput sequencing technology. The results showed that the bacterial communities were consistently dominated by Acidobacteria, Proteobacteria, Actinobacteria, and Chloroflexi. Short-term straw returning and tillage practices significantly altered the diversity, relative abundance and functions of the soil microbiome. Soil subjected to rotary tillage and straw returning (RTS) combination possessed the highest bacterial diversity and lowest ratio of G+/G- bacteria, indicating that RTS could be an efficient integrated management system to improve microbiome in the short term. Double verifications based on relative abundance and network analysis, revealed close relationships of Mycobacterium and Methylibium with RTS, indicating they could serve as biomarkers for RTS. Investigating microbial changes under different agricultural practices will provide valuable foundations for land sustainable utilization and increase crop yields. | Xinyao Xia Piaopiao Zhang Linlin He Xingxing Gao Weijun Li Yuanyuan Zhou Zongxin Li Hui Li Long Yang | 2019 | Journal of Integrative Plant Biology2019，61，6： | 3 |
| 6 | Impacts of space-time-frequency synchronization errors onwide-band target echo characteristics of bistatic/multistatic radar显示文摘Bistatic/multistatic radar has great potential advantages over its monostatic counterpart. However, the separation of a transmitter and a receiver leads to difficulties in locating the target position accurately and guaranteeing space-timefrequency synchronization of the transmitter and the receiver.The error model of space-time-frequency synchronization in a motion platform of bistatic/multistatic radar is studied. The relationship between the space synchronization error and the transmitter platform position, receiver platform position, moving state, and beam pointing error, is analyzed. The effect of space synchronization error on target echo power is studied. The target scattering characteristics are restructured by many separate scattering centers of the target in high frequency regions. Based on the scattering centers model of the radar target, this radar target echo model and the simulation method are discussed. The algorithm of bistatic/multistatic radar target echo accurately reflects the scattering characteristics of the radar target, pulse modulation speciality of radar transmitting signals, and spacetime-frequency synchronization error characteristics between the transmitter station and the receiver station. The simulation of bistatic radar is completed in computer, and the results of the simulation validate the feasibility of the method. | Minghai Pan Qinghua Han Shufeng Gong Weijun Long Haitao Wei | 2016 | Journal of Systems Engineering and Electronics2016，27，3： | 2 |
| 7 | 溃疡性结肠炎内镜严重度指数(UCEIS)预测溃疡性结肠炎患者行储袋成形术的截点值:多中心长期随访研究结果显示文摘背景:全结直肠切除回肠储袋肛管吻合(IPAA)是溃疡性结肠炎(UC)患者的首选外科治疗术式。溃疡性结肠炎内镜严重度指数(UCEIS)用以预测UC患者的IPAA手术需求,目前尚缺乏数据。本研究旨在建立明确UCEIS预测UC患者IPAA手术需求的截点值。方法:对1986年6月至2020年3月间两个中心收治的UC患者进行回顾性分析。基于入院后首次结肠镜检查结果进行UCEIS评分。采用受试者操作特征曲线分析确定UCEIS评分预测IPAA需求的截点值。结果:293例UC患者纳入研究,中位UCEIS为4分。13年随访期间,80例(28.3%)患者接受外科治疗,其中75例(93.8%)行IPAA手术,5例(6.2%)行次全结肠切除加永久性造口。采用6分作为截点值,UCEIS对IPAA手术需求的预测价值最高,曲线下面积为0.769(P<0.001),灵敏度和特异度分别为72.0%和81.8%。UCEIS≥6是需要行IPAA手术(P<0.001)和恶性转化(P=0.010)的独立预测因素。UCEIS≥6的患者无IPAA生存时间显著短缩(P<0.001)。结论:UCEIS≥6或可作为IPAA手术决策的依据,推荐对这些UC患者行手术治疗以减少恶性转化的发生率。 | Weimin Xu Weijun Ou Jihong Fu Yubei Gu Long Cui Jie Zhong Peng Du | 2021 | Gastroenterology Report2021，9，5： | 1 |
| 8 | Influence of Different Hydrocarbon Molecules on Physical Properties of Mineral Base Oils显示文摘Different kinds of base oils with different viscosity were analyzed in this paper, including eight mineral base oils, alkylnaphthalene and three synthetic PAO oils. The influence of different hydrocarbon molecules on physical properties of mineral base oils was investigated, such as density(d), kinematic viscosity(KV), viscosity index(VI), etc. Possible reasons for some inconsistent phenomena in data processing were also theoretically analyzed in detail. The refractive indexes(RI), d and molecular weight(M) decrease linearly with the increase of paraffinic content other than KV, which declines exponentially. There are no clear relationships between physical properties of base oils and naphthenic content while polycyclic alkanes show a strong correlation with M and KV. The influence of aromatics on physical properties of base oils is just the opposite of paraffin's. VI of the base oils with low aromatics content increases linearly as their paraffinic contents rise when their carbon numbers are approximately equal. However, base oils with high aromatics content follow an utterly different rule, in which VI declines dramatically linearly with the increase in polycyclic aromatic content, which is the essential reason why naphthenic base oils all have terrible viscosity-temperature characteristics while paraffinic base oils usually do not. | Wang Weijun Long Jun He Yifeng Sun Hongwei Tian Songbai Zheng Hui | 2017 | China Petroleum Processing & Petrochemical Technology2017，19，1： | 1 |
| 9 | Compositional characteristics and toxicological responses of human lung epithelial cells to inhalable particles (PM_(10)) from ten typical biomass fuel combustions显示文摘As the primary component of haze,atmospheric inhalable particulate matters(PMio)are highly detri-mental to human health.Biomass combustion is one of China's most pivotal sources to aerosols pollution,inducing non-negligible emissions and uncertain risks.PMio samples directly from 10 representative biomass fuel combustion sources(2 groups covering the reality widely:straws of rice,wheat,corn,corncob,soybean,peanut,rape,sesame;and branches of pine,peach)were collected using the dilution channel sampler and analyzed for chemical compositions and in vitro cytotoxicity to human lung epithelial cell lines A549.The components of PMio are dominated by organic carbon(OC),followed by Water-soluble K+and Cl,and rich in metals Fe,Zn,Cr,and Ni.Generally,PMio emitted from biomass fuel combustions can weaken the antioxidant capacity of cells,and straws emissions,especially rape and peanut straws,show stronger ability to further induce oxidative stress and inflammatory damage than fuelwoods,owing to the key toxic roles of Cr,Ni,and Co.Therefore,reducing the specific source emis--sions of PMio from crop straw combustions rich in heavy metals could be an effective oriented strategy to improve environmental air quality and control aerosols pollution precisely for protecting public health. | Hanhan Li Mingwei Tang Xiaosan Luo Weijun Li Yuting Pang Weijie Huang Zhen Zhao Yaqian Wei Tengda Long Tariq Mehmood | 2023 | Particuology2023，，7： | 0 |
| 10 | Joint waveform selection and power allocation algorithm in manned/unmanned aerial vehicle hybrid swarm based on chance-constraint programming显示文摘In this paper, we propose a joint waveform selection and power allocation(JWSPA) strategy based on chance-constraint programming(CCP) for manned/unmanned aerial vehicle hybrid swarm(M/UAVHS) tracking a single target. Accordingly,the low probability of intercept(LPI) performance of system can be improved by collaboratively optimizing transmit power and waveform. For target radar cross section(RCS) prediction, we design a random RCS prediction model based on electromagnetic simulation(ES) of target. For waveform selection, we build a waveform library to adaptively manage the frequency modulation slope and pulse width of radar waveform. For power allocation,the CCP is employed to balance tracking accuracy and power resource. The Bayesian Cramér-Rao lower bound(BCRLB) is adopted as a criterion to measure target tracking accuracy. The hybrid intelli gent algorithms, in which the stochastic simulation is integrated into the genetic algorithm(GA), are used to solve the stochastic optimization problem. Simulation results demonstrate that the proposed JWSPA strategy can save more transmit power than the traditional fixed waveform scheme under the same target tracking accuracy. | ZHANG Yuanshi PAN Minghai LONG Weijun LI Hua HAN Qinghua | 2022 | Journal of Systems Engineering and Electronics2022，33，3： | 0 |
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