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Simultaneous attack of a stationary target using multiple missiles: a consensus-based approach

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Science China(Information Sciences) 2017年第7期60卷 67-80页

作者： jialing ZHOU Jianying YANG Zhongkui li State Key Laboratory for Turbulence and Complex Systems Department of Mechanics and Engineering ScienceCollege of Engineering Peking University

This paper considers the simultaneous attack problem of multiple missiles against a stationary target. Built upon the classic proportional navigation structure, we propose a consensus-based approach to design the cooperative guidance law. Specifically, we present time-varying navigation ratios for the missiles,which exchange the time-to-go estimates between neighboring missiles via a communication network. For the cases where the communication topology is undirected or in the leader–follower structure with a missile acting as the leader whose navigation ratio cannot be tuned, we show that the proposed cooperative guidance law can solve the simultaneous attack problem. The effectiveness of the theoretical results is finally illustrated by numerical simulations.

关键词： simultaneous attack consensus problem cooperative control distributed control guidance law design

Motor neuron-specific RhoA knockout delays degeneration and promotes regeneration of dendrites in spinal ventral horn after brachial plexus injury

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Neural Regeneration Research 2023年第12期18卷 2757-2761页

作者： Mi li Jiawei Xu Ying Zou jialing Lu Aiyue Ou Xinrui Ma Jiaqi Zhang Yizhou Xu Lanya Fu Jingmin liu Xianghai Wang libing Zhou Jiasong Guo Department of Histology and Embryology School of Basic Medical SciencesSouthern Medical UniversityGuangzhouGuangdong ProvinceChina Department of Spine Orthopedics Zhujiang HospitalSouthern Medical UniversityGuangzhouGuangdong ProvinceChina Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering Southern Medical UniversityGuangzhouGuangdong ProvinceChina Key Laboratory of Mental Health of the Ministry of Education Guangdong-Hong Kong-Macao Greater Bay Area Center for Brain Science and Brain-Inspired IntelligenceGuangdong Province Key Laboratory of Psychiatric DisordersGuangzhouGuangdong ProvinceChina Guangdong-Hong Kong-Macao Institute of CNS Regeneration Ministry of Education CNS Regeneration Collaborative Joint LaboratoryJinan UniversityGuangzhouGuangdong ProvinceChina

Dendrites play irreplaceable roles in the nerve conduction pathway and are vulnerable to various insults.Peripheral axotomy of motor neurons results in the retraction of dendritic arbors,and the dendritic arbor can be re-expanded when reinnervation is allowed.RhoA is a target that regulates the cytoskeleton and promotes neuronal survival and axon regeneration.However,the role of RhoA in dendrite degeneration and regeneration is unknown.In this study,we explored the potential role of RhoA in dendrites.A line of motor neuronal conditional knockout mice was developed by crossbreeding HB9~(Cre+)mice with RhoA~(flox/flox)mice.We established two models for assaying dendrite degeneration and regeneration,in which the brachial plexus was transection or crush injured,respectively.We found that at 28 days after brachial plexus transection,the density,complexity,and structural integrity of dendrites in the ventral horn of the spinal cord of RhoA conditional knockout mice were slightly decreased compared with that in Cre mice.Dendrites underwent degeneration at 7 and 14 days after brachial plexus transection and recovered at 28–56 days.The density,complexity,and structural integrity of dendrites in the ventral horn of the spinal cord of RhoA conditional knockout mice recovered compared with results in Cre mice.These findings suggest that RhoA knockout in motor neurons attenuates dendrite degeneration and promotes dendrite regeneration after peripheral nerve injury.

关键词： brachial plexus conditional knockout degeneration dendrites motor neuron peripheral nerve injury regeneration RhoA spinal cord ventral horn

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磷渣酸高温活化低品位磷矿制备聚合态磷肥

化工矿物与加工 2024年第3期53卷 30-36页

作者：李莹莹孙玉翠梅毅匡家灵刘翠侠马航昆明理工大学化学工程学院云南省磷化工节能与新材料重点实验室云南云天化股份有限公司研发中心云南云天化以化磷业研究技术有限公司

以低品位磷矿和磷渣酸为主要原料，采用高温煅烧方法对其进行活化，制备了一种聚合态磷肥，通过单因素试验对反应条件进行了探索，得到的适宜反应条件为：聚合反应温度600℃、聚合反应时间40 min、原料配比m(酸P2O5)/m(矿P2O5)为2.5。... 详细信息

以低品位磷矿和磷渣酸为主要原料，采用高温煅烧方法对其进行活化，制备了一种聚合态磷肥，通过单因素试验对反应条件进行了探索，得到的适宜反应条件为：聚合反应温度600℃、聚合反应时间40 min、原料配比m(酸P2O5)/m(矿P2O5)为2.5。在此条件下制备得到的聚合态磷肥为疏松多孔的块状结构，其中聚合磷质量分数为35.70%、聚合率为86.47%,有效磷质量分数为36.40%、占总磷的88%,钙、镁的有效占比分别为60.3%和75.6%,溶解试验结果显示该聚合态磷肥主要以枸溶性为主。

关键词：低品位磷矿磷渣酸聚合磷高温聚合聚合率磷肥

Entransy dissipation/loss-based optimization of two-stage organic Rankine cycle(TSORC)with R245fa for geothermal power generation

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Science China(Technological Sciences) 2016年第10期59卷 1524-1536页

作者： li TaiLu YUAN ZhenHe XU Peng ZHU jialing School of Energy and Safety Engineering Tianjin Chengjian UniversityTianjin 300384China Key Laboratory of Efficient Utilization of Low and Medium Grade Energy Ministry of EducationTianjin UniversityTianjin 300072China

Based on organic Rankine cycle(ORC), the two-stage evaporation strategy is adopted to replace the single-stage evaporation to improve the system performance. In order to evaluate the temperature matching of the two-stage evaporation, a theoretical optimization model was established to optimize the two stage organic Rankine cycle(TSORC) based on the entransy theory and thermodynamics, with the ratio of the entransy dissipation rate of the TSORC to that of the ORC as the objective function. This paper aims to illuminate the improving degree of the system performance of the TSORC. The results show that the TSORC enhances the average evaporating temperature, thereby reducing the entransy dissipation rate in the evaporator and the total entransy dissipation rate. The maximal net power output is proportional to the entransy loss rate and inversely proportional to the entransy dissipation rate. However, compared with the ORC, the TSORC can output more power but requires a higher total thermal conductance. Moreover, there exists an optimal intermediate geothermal water temperature(IGWT) to maximize the net power output of the TSORC. The TSORC can be considered in engineering applications.

关键词：地热发电循环优化耗散理论损失率蒸发温度实验功率输出朗肯循环

普通话噪声接受度追踪测试材料的开发与等价性评估

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听力学及言语疾病杂志 2024年第4期32卷 302-307页

作者：郑雨晴龚嘉敏管鹏飞冯佳玲肖永涛樊婷代阿强周柔嘉李华伟王云峰浙江中医药大学医学技术与信息工程学院杭州310053 复旦大学附属眼耳鼻喉科医院耳鼻喉科复旦大学国家卫生健康委听力医学重点实验室

目的开发普通话噪声接受度追踪(tracking of noise tolerance,TNT)测试材料并进行等价性评估。方法开发6组易于普通大众理解的言语材料(主题分别为日常生活、娱乐、家庭、节日、户外和学校);选取21例听力正常人分别进行6组测试材料的4分... 详细信息

目的开发普通话噪声接受度追踪(tracking of noise tolerance,TNT)测试材料并进行等价性评估。方法开发6组易于普通大众理解的言语材料(主题分别为日常生活、娱乐、家庭、节日、户外和学校);选取21例听力正常人分别进行6组测试材料的4分钟TNT测试,分别计算获得31~240 s、31~120 s、151~240 s三个时间窗的可容忍噪声水平(tolerable noise level,TNL)和TNT分数。结果听力正常个体间TNL值存在差异(F=43.611,P<0.05)。6组测试材料的标准化(z-scored)分数在三个时间窗内均有统计学差异(P<0.05),事后比较发现,所有的显著性差异结果都涉及家庭和/或日常生活主题。结论本研究开发的娱乐、节日、户外和学校的主题测试材料可作为普通话TNT测试的正式测试材料,可应用于实验研究和临床测试。

关键词：噪声接受度追踪测试可接受噪声级言语识别测试等价性

Cooperative Guidance Law Design for Simultaneous Attack with Multiple Missiles Against a Maneuvering Target

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Journal of Systems Science & Complexity 2018年第1期31卷 287-301页

作者： ZHOU jialing Lü Yuezu li Zhongkui YANG Jianying Ministerial Key Laboratory of ZNDY School of Mechanical Engineering Nanjing University of Science and Technology Nanjing 210094 China National Defense Key Laboratory of Science and Technology on Electromagnetic Scattering the 802 Institute of Shanghai Academy of Space Flight Technology the Eighth Academy of China Aerospace Science and Technology Corporation Shanghai 200090 China State Key Laboratory for Turbulence and Complex Systems Department of Mechanics and Engineering Science College of Engineering Peking University Beijing 100871 China

这份报纸对一个调遣的目标考虑多重导弹的同时的攻击问题。与大多数同时的攻击问题在被提出的存在文学不同当导弹 time-to-go 的一个一致问题估计，这份报纸作为导弹 ranges-to-go 的一致问题提出它。基于这策略，新奇分布式的指导法律... 详细信息

这份报纸对一个调遣的目标考虑多重导弹的同时的攻击问题。与大多数同时的攻击问题在被提出的存在文学不同当导弹 time-to-go 的一个一致问题估计，这份报纸作为导弹 ranges-to-go 的一致问题提出它。基于这策略，新奇分布式的指导法律被建议与未知可操作性的目标解决同时的攻击问题。适应控制方法被介绍估计目标加速的上面的界限。建议指导法律的有效性理论上并且数字地被验证。

关键词：攻击导弹法律多重设计合作分布式报纸

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电加热机织物的发热性能及发热均匀性探讨

产业用纺织品 2024年第1期42卷 31-37页

作者：孟小奕和杉杉周心怡李嘉玲饶仓尔薛文良东华大学产业用纺织品教育部工程研究中心上海201620 东华大学纺织学院上海201620 联通(浙江)产业互联网有限公司浙江杭州310051

以发热功率密度和温度均匀系数为指标,基于正交试验方案,探讨以不锈钢纤维纱为电加热元件的电加热机织物制备工艺。并基于九宫格取点法,优化温度均匀系数测试方法。研究发现:本研究中,温度测点取81点是可信的均匀度评价方案。电加热机... 详细信息

以发热功率密度和温度均匀系数为指标,基于正交试验方案,探讨以不锈钢纤维纱为电加热元件的电加热机织物制备工艺。并基于九宫格取点法,优化温度均匀系数测试方法。研究发现:本研究中,温度测点取81点是可信的均匀度评价方案。电加热机织物的纬纱排列规律为1根不锈钢纤维纱+3根黏胶纱、纬纱密度为10.5根/cm、组织结构为经二重1/7时,织物具有较为优异的发热性能,发热功率密度为857.23 W/m^(2);电加热机织物的纬纱排列规律为1根不锈钢纤维纱+5根黏胶纱、纬纱密度为6.5根/cm、组织结构为经二重1/3时,电加热机织物具有较为优异的发热均匀性。

关键词：电加热机织物发热性能发热均匀性不锈钢纤维正交试验九宫格取点法纬纱排列规律纬纱密度组织结构

基于径流侵蚀功率的长江典型流域能沙关系模型及改进

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农业工程学报 2024年第5期40卷 128-140页

作者：贾路李占斌于坤霞李鹏徐国策丛佩娟李斌斌西安理工大学西北旱区生态水利国家重点实验室西安710048 西安理工大学旱区生态水文与灾害防治国家林业和草原局重点实验室西安710048 水利部水土保持监测中心北京100053

基于径流侵蚀功率概念建立流域能沙关系模型,可为长江流域泥沙变化精准模拟与水土保持规划提供技术支撑。该研究以长江典型流域及其典型小流域为研究对象,通过收集1965—2018年金沙江流域、嘉陵江流域和湘江流域3个典型流域逐日水沙数... 详细信息

基于径流侵蚀功率概念建立流域能沙关系模型,可为长江流域泥沙变化精准模拟与水土保持规划提供技术支撑。该研究以长江典型流域及其典型小流域为研究对象,通过收集1965—2018年金沙江流域、嘉陵江流域和湘江流域3个典型流域逐日水沙数据以及万安和李子口2个典型小流域2014—2020年场次降水径流泥沙数据,采用径流侵蚀功率、径流量和降雨侵蚀力对比分析不同时空尺度水沙(径流量和输沙量)、雨沙(降雨侵蚀力和输沙量)和能沙(径流侵蚀功率和输沙量)关系的优劣性,解析能沙关系优越性,并识别能沙关系非一致性变化,从而改进能沙关系模型提高流域输沙量模拟精度。结果表明:1)长江流域3个典型流域及2个典型小流域,在绝大部分情况下能沙关系的表现总是优于水沙关系和雨沙关系,在场次、月和年尺度修正的决定系数最大值分别可达到0.94、0.87和0.54。2)对于不同时间尺度,其流量序列中任意2个流量乘积与输沙量的相关性较高时,第一个流量Q_(1)分位点总是接近1且第二个流量Q_(2)分位点在0.5附近或者高于0.5。基于径流侵蚀功率可以较为准确地计算不同时空尺度流域输沙量,具有明显适用性。3)随着时间升尺度,水沙、雨沙和能沙关系逐渐变差,3个典型流域径流侵蚀功率和输沙量在一些月份上均存在显著变化趋势和显著突变点(P<0.05)。特别是在年尺度上,输沙量均为显著减少趋势(P<0.05),其能沙关系均表现出非一致性变化。4)水库建设和植被增加是导致流域能沙关系变差的重要原因,其均与输沙量呈现极显著负相关(P<0.001)。通过考虑水库指数和NDVI改进能沙关系模型的年决定系数(R^(2))可提高27.28%~97.62%。研究成果可支撑开发新的流域泥沙预报模型,服务长江流域生态保护与高质量发展。

关键词：土壤侵蚀降雨径流侵蚀功率能沙关系长江流域非一致性水库指数

Characterization of a novel regulatory pathway for mannitol metabolism and its coordination with biofilm formation in Mycobacterium smegmatis

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Journal of Genetics and Genomics 2018年第9期45卷 477-488页

作者： jialing Hu Hua Zhang Si Zhou Weihui li Zheng-Guo He National Key Laboratory of Agricultural Microbiology College of Life Science and TechnologyHuazhong Agricultural University

Biofilm formation has been implicated to be tightly regulated in bacteria. Mycobacterial species possess a unique cell-wall structure; however, the underlying regulation mechanism for their biofilm formation remains largely unclear. In this study, we characterized a hypothetical mannitol metabolism and transportation gene cluster（Ms5571-Ms5576）, designated as mmt operon, whose expression significantly contributes to the biofilm formation in Mycobacterium smegmatis. We showed that in the operon the Ms5575 gene encodes a GntR-like transcriptional repressor and the Ms5576 gene encodes a mannitol2-dehydrogenase which can produce D-mannitol from D-mannose. Strikingly, the D-mannitol molecule can derepress the negative regulation of Ms5575 on the mmt operon to stimulate the operon＇s expression. Consistently, addition of D-mannitol into the medium can obviously induce mycobacterial biofilm formation. Furthermore, we found that Ms0179 positively regulates the mmt operon through its downstream regulator Ms0180. Ms0180 directly binds the mmt operon to positively regulate its expression. Both Ms0179 and Ms0180 significantly affect the mycobacterial biofilm formation. Taken together, we explored a regulatory pathway for the mannitol metabolism and its coordination with the biofilm formation in M. smegmatis. This finding provides novel insights into the unique mechanism of biofilm formation regulation in mycobacteria.

关键词： Transcription regulation Biofilm formation Mannitol Mycobacteria