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Geo-Spatial Information Science 2021年第4期24卷 654-665页

作者： sihang zhang Zhenfeng Shao Xiao Huang Linze Bai Jiaming Wang State Key Laboratory of Information Engineering in Surveying Mapping and Remote Sensing Wuhan UniversityWuhanChina Department of Geosciences University of ArkansasFayettevilleNCUSA

Due to the bird’s eye view of remote sensing sensors,the orientational information of an object is a key factor that has to be considered in object *** obtain rotating bounding boxes,existing studies either rely on rotated anchoring schemes or adding complex rotating ROI transfer layers,leading to increased computational demand and reduced detection *** this study,we propose a novel internal-external optimized convolutional neural network for arbitrary orientated object detection in optical remote sensing *** the internal opti-mization,we designed an anchor-based single-shot head detector that adopts the concept of coarse-to-fine detection for two-stage object detection *** refined rotating anchors are generated from the coarse detection head module and fed into the refining detection head module with a link of an embedded deformable convolutional *** the external optimiza-tion,we propose an IOU balanced loss that addresses the regression challenges related to arbitrary orientated bounding *** results on the DOTA and HRSC2016 bench-mark datasets show that our proposed method outperforms selected methods.

关键词： Arbitrary orientated object detection optical remote sensing image single-shot deep learning

Late Miocene Pods and Leaves of Albizzia (Leguminosae:Mimosoideae) from Yunnan,SW China and Their Phytogeographic Implications

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Acta Geologica Sinica(English Edition) 2017年第4期91卷 1190-1199页

作者： LI Binke XIE Sanping zhang sihang CHEN Tianyu SHAO Yang School of Earth Sciences and Key Laboratory of Mineral Resources in Western China(Gansu Province) Lanzhou University State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and PaleontologyCAS

Albizzia is a leguminous genus belonging to the subfamily Mimosoideae with approximately 150 modern species, widely distributed in the tropical and subtropical regions of Asia, Africa, Australia and America. Among them, 17 species are mainly distributed in southern and southwestern China. Abundant fossils of the subfamily Mimosoideae, including leaves, pods, flowers and wood, have been reported from the Cretaceous and Paleogene strata of the Northern Hemisphere. However, Neogene records of Mimosoideae are relatively scarce. In this study, fossil pods and leaves belonging to the genus Aibizzia from the Bangmai Formation of Yunnan, China were described. They were assigned to three species, including Albizzia scalpeUiformis Guo, Li and Xie Emended, Albizzia cf. kalkora （Roxb.） Prain and Albizzia sp. The occurrence of Albizzia fossils from Lincang not only gives important information on the Neogene plant diversity from Yunnan--a worldwide famous biological hotspot--but also provides additional evidence for its phytogeographic history.

关键词： Albizzia Mimosoideae morphology Late Miocene Lincang

Dependence of lithium metal battery performances on inherent separator porous structure regulation

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Journal of Energy Chemistry 2023年第9期84卷 436-447页

作者： Lei Ding Dandan Li Lingyang Liu Pengfang zhang Fanghui Du Chao Wang Daoxin zhang Shuo zhang sihang zhang Feng Yang Shandong Key Laboratory of Chemical Energy Storage and New Battery Technology Institute of BioPharmceutical ResearchSchool of Chemistry and Chemical EngineeringLiaocheng UniversityLiaocheng 252000ShandongChina State Key Laboratory of Polymer Materials Engineering College of Polymer Science and EngineeringSichuan UniversityChengdu 610065SichuanChina College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042ShandongChina School of Food Science and Engineering Hainan UniversityHaikou 570228HainanChina

Boosting of rechargeable lithium metal batteries(LMBs) holds challenges because of lithium dendrites germination and high-reactive surface *** may experience structure-determined chemical deterioration and worsen Li plating-stripping behaviors when smoothly shifting from lithium-ion batteries(LIBs) to *** study precisely regulations the crystal structure of β-polypropylene and separator porous construction to investigate the intrinsic porous structure and mechanical properties determined electrochemical performances and cycling durability of *** structure characterizations,porous structure analyses,and electrochemical cycling tests uncover appropriate annealing thermal stimulation concentrates β-lamellae thickness and enhances lamellae thermal stability by rearranging molecular chain in inferior β-lamellae,maximally homogenizing biaxial tensile deformation and resultant porous *** even pores with high connectivity lower ion migration barriers,alleviate heterogeneous Li^(+) flux dispersion,stabilize reversible Li plating-stripping behaviors,and hinder coursing and branching of Li dendrites,endowing steady cell cycling durability,especially at higher currents due to the highlighted uncontrollable cumulation of dead Li,which offers new insights for the current pursuit of high-power density battery and fast charging *** suggested separator structure-chemical nature functions in ensuring cyclic cell stability and builds reliable relationships between separator structure design and practical LMBs applications.

关键词： Lithium metal battery Polyolefin separator Porous structure design Lithium dendrite regulation Cycling stability

A rationally designed cancer vaccine based on NIR-II fluorescence image-guided light-triggered remote control of antigen cross-presentation and autophagy

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Acta Pharmaceutica Sinica B 2023年第7期13卷 3121-3136页

作者： Aihua Wu Afeng Yang Qinli Tong Guoguang Wei sihang zhang Sheng Yu Chen zhang Jiaojiao Xu Wei Lu School of Pharmacy&Minhang Hospital Key Laboratory of Smart Drug DeliveryMinistry of Education&State Key Laboratory of Molecular Engineering of PolymersFudan UniversityShanghai 201203China

Cancer vaccines represent a promising immunotherapeutic treatment *** promotion of cross-presentation of extracellular tumor-associated antigens on the major histocompatibility complex(MHC) class I molecules and dendritic cell maturation at the appropriate time and place is crucial for cancer vaccines to prime cytolytic T cell response with reduced side *** vaccination strategies,however,are not able to achieve the spatiotemporal control of antigen ***,we report a liposomal vaccine loading the second near-infrared window(NIR-II,1000—1700 nm) fluorophore BPBBT with an efficient photothermal conversion effect that offers an NIR-light-triggered endolysosomal escape under the imaging *** NIR-II image-guided vaccination strategy specifically controls the cytosolic delivery of antigens for cross-presentation in the draining lymph nodes(DLNs).Moreover,the photothermally induced endolysosomal rupture initiates *** also find that the adjuvant simvastatin acts as an autophagy activator through inhibiting the PI3K/AKT/m TOR *** light-induced autophagy in the DLNs together with simvastatin treatment cooperatively increase MHC class II expression by activating autophagy machinery for dendritic cell *** study presents a paradigm of NIR-II image-guided light-triggered *** approach for remote control of antigen cross-presentation and autophagy represents a new strategy for vaccine development.

关键词： Vaccine Light-triggered NIR-II imaging Cross-presentation Autophagy Simvastatin Endolysosomal escape Dendritic cell maturation

Visible-light-driven photocatalytic degradation of rhodamine B using Bi_(2)WO_(6)/GO deposited on polyethylene terephthalate fabric

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Journal of Leather Science and Engineering 2020年第1期2卷 175-184页

作者： Zoufei Du Ce Cui sihang zhang Hongyan Xiao Erhui Ren Ronghui Guo Shouxiang Jiang State Key Laboratory of Polymer Materials Engineering of China(Sichuan University) Polymer Research Institute of Sichuan UniversityChengdu 610065China College of Biomass Science and Engineering Sichuan UniversityNo.24 South Section 1Yihuan RoadChengduChina Institute of Textiles and Clothing The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina

The environmental repercussions of wastewater from the dye process mean that it is very important to obtain an eco-friendly photocatalyst that would degrade ***,bismuth tungstate/graphene oxide(Bi_(2)WO_(6)/GO)composites are fabricated through in-situ hydrothermal reaction and then the Bi_(2)WO_(6)/GO photocatalysts are deposited onto polyethylene terephthalate(PET)*** obtained Bi_(2)WO_(6)/GO deposited PET fabrics are then characterized through XPS,Raman,SEM,TEM,XRD,UV-vis,BET method and photoluminescence spectroscopy(PL)to investigate their chemical and crystal structures,morphology,optical property,surface area and photochemical *** performance is studied through examining the rate of degrading rhodamine B(RhB)under visible *** of PET fibers is densely covered with Bi_(2)WO_(6)/***_(2)WO_(6)/GO deposited PET fabrics show a broad absorption band in the visible *** rate of RhB on the Bi_(2)WO_(6)/GO deposited PET fabric is the highest with the GO content of 2 g/L(labeled as Bi_(2)WO_(6)/2 g/LGO).The result of active species experiment shows that superoxide radicals(·O_(2)^(−))plays a major role in the degradation of ***,Bi_(2)WO_(6)/2 g/LGO deposited PET fabric shows excellent cycle stability of photocatalytic degradation for *** findings in this work can be extended to preparation other types of composite on the textile for photocatalysis,which can be applied to remove dyes in the wastewater produced by the textile or leather industry.

关键词： Bi_(2)WO_(6)/GO depositing RhB PET fabric Photocatalytic performance Visible light-driven

The combined therapeutic effects of ^(131)iodinelabeled multifunctional copper sulfide-loaded microspheres in treating breast cancer

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Acta Pharmaceutica Sinica B 2018年第3期8卷 371-380页

作者： Qiufang Liu Yuyi Qian Panli Li sihang zhang Zerong Wang Jianjun Liu Xiaoguang Sun Michael Fulham Dagan Feng Zhigang Chen Shaoli Song Wei Lu Gang Huang Department of Nuclear Medicine Ren Ji Hospital School of Medicine Shanghai Jiao Tong University SJTU-USYD Joint Research Alliance for Translational Medicine Shanghai Jiao Tong University Institute of Clinical Nuclear Medicine Ren Ji Hospital School of Medicine Shanghai Jiao Tong University Department of Pharmaceutics School of Pharmacy Key Laboratory of Smart Drug Delivery Ministry of Education & State Key Laboratory of Molecular Engineering of Polymers Fudan University Shanghai Gezhi Middle School Department of Molecular Imaging Royal Prince Alfred Hospital Australia and Sydney Medical School University of Sydney Biomedical and Multimedia Information Technology Research Group School of Information Technologies University of Sydney Centre for Future Materials University of Southern Queensland Department of Biomedical and Pharmaceutical Sciences College of Pharmacy the University of Rhode Island Shanghai Key Laboratory for Molecular Imaging Shanghai University of Medicine and Health Sciences

Compared to conventional cancer treatment, combination therapy based on well-designed nanoscale platforms may offer an opportunity to eliminate tumors and reduce recurrence and *** this study, we prepared multifunctional microspheres loading ^(131)I-labeled hollow copper sulfide nanoparticles and paclitaxel( ^(131)I-HCu SNPs-MS-PTX) for imaging and therapeutics of W256/B breast tumors in rats.18 F-fluordeoxyglucose(18 F-FDG) positron emission tomography/computed tomography(PET/CT) imaging detected that the expansion of the tumor volume was delayed(Po0.05) following intra-tumoral(i.t.) injection with ^(131)I-HCu SNPs-MS-PTX plus near-infrared(NIR) irradiation. The immunohistochemical analysis further confirmed the anti-tumor effect. The single photon emission computed tomography(SPECT)/photoacoustic imaging mediated by ^(131)I-HCu SNPs-MS-PTX demonstrated that microspheres were mainly distributed in the tumors with a relatively low distribution in other organs. Our results revealed that ^(131)I-HCu SNPs-MS-PTX offered combined photothermal, chemo-and radio-therapies, eliminating tumors at a relatively low dose, as well as allowing SPECT/CT and photoacoustic imaging monitoring of distribution of the injected agents non-invasively. The copper sulfide-loaded microspheres, ^(131)I-HCu SNPs-MS-PTX, can serve as a versatile theranostic agent in an orthotopic breast cancer model.

关键词： Microspheres Theranostics Combination therapy Single photon emission computed tomography/computed tomography(SPECT/CT) Photoacoustic imaging

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面向空间目标相对轨道确定的编队优化方法

宇航学报 2022年第11期43卷 1511-1521页

作者：李佳兴袁利张聪张斯航孙栋北京控制工程研究所北京100094 空间智能控制技术重点实验室北京100094

针对提高空间目标相对轨道确定精度的问题,研究了在主航天器轨道运动受限时,通过设计和优化辅航天器相对轨道要素的航天器编队优化方法。首先,介绍了基于扩展卡尔曼滤波的双视线测量相对轨道确定方法;之后,通过研究双视线测量下的空间... 详细信息

针对提高空间目标相对轨道确定精度的问题,研究了在主航天器轨道运动受限时,通过设计和优化辅航天器相对轨道要素的航天器编队优化方法。首先,介绍了基于扩展卡尔曼滤波的双视线测量相对轨道确定方法;之后,通过研究双视线测量下的空间目标定位误差变化规律,得到了减小定位误差的角度条件;然后,通过分析该角度条件和辅航天器相对轨道要素的关系,设计并采用遗传算法优化了辅航天器相对轨道;最后,数学仿真结果表明,设计的编队可保证目标相对位置估计误差收敛,优化后的编队可使目标相对位置估计误差减小至0.3 km且不超过1.2 km。

关键词：相对轨道确定航天器编队优化遗传算法扩展卡尔曼滤波

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基于分段常值推力的水滴悬停构型控制策略

北京航空航天大学学报 2019年第3期45卷 560-566页

作者：白晟州王慧疆韩潮张斯航北京航空航天大学宇航学院北京100083

针对航天器编队飞行任务对相对运动控制的要求,研究了在分段常值推力控制下航天器受迫绕飞构型的设计与控制问题。首先,基于脉冲控制下的水滴悬停构型,提出了多段常值推力控制实现水滴悬停构型的打靶方程;将打靶方程转化为求解极值问题... 详细信息

针对航天器编队飞行任务对相对运动控制的要求,研究了在分段常值推力控制下航天器受迫绕飞构型的设计与控制问题。首先,基于脉冲控制下的水滴悬停构型,提出了多段常值推力控制实现水滴悬停构型的打靶方程;将打靶方程转化为求解极值问题,采用最小二乘法来求解;分析了一段常值推力可行性。然后,以连续常值小推力控制方程为基础,推导了小邻域定理,分析了近距离相对运动条件下两段常值推力控制的可行性;针对可能出现求解精度差的问题,提出了小推力增量方程来修正精度,并证明在靠近理想解的情况下多次迭代可以趋近于理想解。最后,通过数值仿真实现常值小推力控制下的水滴悬停相对运动。数值仿真结果表明常值小推力控制策略可行,研究成果完善了航天器受迫绕飞构型设计与控制的相关理论,为工程应用提供参考。

关键词：编队飞行水滴悬停最小二乘优化打靶方程构型设计

基于优先级的电力调度数据多信道同步传输方法

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通信电源技术 2024年第21期41卷 53-55页

作者：张斯珩江西电力职业技术学院江西南昌330032

针对电力通信网络中调度数据传输延迟较高,且多个信道之间延迟差异较大的问题,提出基于优先级的电力调度数据多信道同步传输方法。通过评估节点间的信噪比和贡献度,在高信噪比条件下实现电力通信网络的多信道同步传输。实验结果表明,所... 详细信息

针对电力通信网络中调度数据传输延迟较高,且多个信道之间延迟差异较大的问题,提出基于优先级的电力调度数据多信道同步传输方法。通过评估节点间的信噪比和贡献度,在高信噪比条件下实现电力通信网络的多信道同步传输。实验结果表明,所提方法可以有效降低传输延迟,同时缩小多个信道之间的延迟差距。该方法具备有效性和实用性,可为电力通信网络的优化与升级提供有力的技术支持。

关键词：电力通信网络调度数据同步传输多信道

基于强化学习的动目标协同观测任务自主规划方法

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空间控制技术与应用 2024年第3期50卷 42-51页

作者：刘一隆张聪张斯航陈砺寒北京控制工程研究所北京100094

随着空间目标的数量逐渐增多、空中目标动态性日趋提升,对目标的观测定位问题变得愈发重要.由于需同时观测的目标多且目标动态性强,而星座观测资源有限,为了更高效地调用星座观测资源,需要动态调整多目标协同观测方案,使各目标均具有较... 详细信息

随着空间目标的数量逐渐增多、空中目标动态性日趋提升,对目标的观测定位问题变得愈发重要.由于需同时观测的目标多且目标动态性强,而星座观测资源有限,为了更高效地调用星座观测资源,需要动态调整多目标协同观测方案,使各目标均具有较好的定位精度,因此需解决星座协同观测多目标的任务规划问题.建立星座姿态轨道模型、目标飞行模型、目标协同探测及定位模型,提出基于几何精度衰减因子(geometric dilution of precision, GDOP)的目标观测定位误差预估模型及目标观测优先级模型,建立基于强化学习的协同观测任务规划框架,采用多头自注意力机制建立策略网络,以及近端策略优化算法开展任务规划算法训练.仿真验证论文提出的方法相比传统启发式方法提升了多目标观测精度和有效跟踪时间,相比遗传算法具有更快的计算速度.

关键词：多目标协同观测任务规划强化学习自注意力机制近端策略优化