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SinGRAV: Learning a Generative Radiance Volume from a Single Natural Scene

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Journal of Computer Science & Technology 2024年第2期39卷 305-319页

作者：王玉洁陈学霖陈宝权 School of Computer Science and Technology Shandong UniversityQingdao 266237China State Key Laboratory of General Artificial Intelligence Beijing 100871China School of Intelligence Science and Technology Peking UniversityBeijing 100871China Tencent AI Lab Tencent Holdings LimitedShenzhen 518057China

We present SinGRAV, an attempt to learn a generative radiance volume from multi-view observations of a single natural scene, in stark contrast to existing category-level 3d generative models that learn from images of many object-centric scenes. Inspired by SinGAN, we also learn the internal distribution of the input scene, which necessitates our key designs w.r.t. the scene representation and network architecture. Unlike popular multi-layer perceptrons (MLP)-based architectures, we particularly employ convolutional generators and discriminators, which inherently possess spatial locality bias, to operate over voxelized volumes for learning the internal distribution over a plethora of overlapping regions. On the other hand, localizing the adversarial generators and discriminators over confined areas with limited receptive fields easily leads to highly implausible geometric structures in the spatial. Our remedy is to use spatial inductive bias and joint discrimination on geometric clues in the form of 2d depth maps. This strategy is effective in improving spatial arrangement while incurring negligible additional computational cost. Experimental results demonstrate the ability of SinGRAV in generating plausible and diverse variations from a single scene, the merits of SinGRAV over state-of-the-art generative neural scene models, and the versatility of SinGRAV by its use in a variety of applications. Code and data will be released to facilitate further research.

关键词： generative model neural radiance field 3d scene generation

The evolution and functional divergence of 10 Apolipoprotein d-like genes in Nilaparvata lugens

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Insect Science 2024年第1期31卷 91-105页

作者： Jia-bao Lu Peng-Peng Ren Qiao Li Fang He Zhong-Tian Xu Sai-Nan Wang Jian-Ping Chen Jun-Min Li Chuan-Xi Zhang Citrus Research Institute Southwest University/Chinese Academy of Agricultural SciencesNational Engineering Research Center for CitrusChongqingChina Technology Center of Wuhan Customs district HubeiChina Institute of Insect Science Zhejiang UniversityHangzhouChina

Apolipoprotein d(Apod),a member of the lipocalin superfamily of proteins,is involved in lipid transport and stress *** only a single copy of the Apod gene is found in humans and some other vertebrates,there are typically several Apod-like genes in *** date,there have been relatively few studies that have examined the evolution and functional differentiation of Apod-like genes in insects,particularly hemi-metabolous *** this study,we identified 10 Apod-like genes(NlApod1−10)with distinct spatiotemporal expression patterns in Nilaparvata lugens(BPH),which is an important pest of ***1−10 were found to be distributed on 3 chromosomes in a tandem array of NlApod1/2,NlApod3−5,and NlApod7/8,and show sequence and gene structural divergence in the coding regions,indicating that multiple gene duplication events occurred during *** analysis revealed that NlApod1−10 can be clustered into 5 clades,with NlApod3−5 and NlApod7/8 potentially evolving exclusively in the delphacidae *** screening using an RNA interference approach revealed that only NlApod2 was essential for BPH development and survival,whereas NlApod4/5 are highly expressed in testes,and might play roles in ***,stress response analysis revealed that NlApod3−5/9,NlApod3−5,and NlApod9 were up-regulated after treatment with lipopolysaccharide,H2O2,and ultraviolet-C,respectively,indicating their potential roles in stress resistance.

关键词： Apolipoprotein d BPH evolution functional divergence gene duplication NIApod

Unraveling the evolution of oxygen vacancies in TiO/Cu and its role in COhydrogenation

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Science China Chemistry 2024年

作者： Ke Wang Fanxing Zhang Ning Cao Ying bao Mi Yan Keping Yan Pengfei Xie State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization Baotou Research Institute of Rare Earths School of Materials Science and Engineering Zhejiang University Institute of Zhejiang University-Quzhou College of Chemical and Biological Engineering Zhejiang University department of Chemistry Western Washington University Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering

The remarkable contribution of oxygen vacancies has been revealed by the operando spectroscopies for methanol synthesis from CO2hydrogeneration on the reducible metal oxide-supported copper catalysts. However, a challenge remains in the intrinsic understanding of the evolution and advantage of oxygen vacancies for methanol synthesis. Here we prepare the TiO2–x/Cu with different oxygen vacancy densities by adjusting the ball-milling frequency. At the optimal condition, a TiO2–x/Cu with more oxygen vacancies delivers an excellent methanol yield of 26.5 mmol g-1h-1at 300 °C with a selectivity of more than 70%. The combined analysis of experimental characterizations and theoretical calculations reveals that the mutual dispersions of TiO2–xand Cu driven by mechanical energy induce the electron rearrangement in the d orbital of the Ti atom and relax the Ti–O binding at the interface, which facilitates the formation of oxygen vacancies that further reduce the barrier of CO2hydrogenation to*HCOO due to higher nucleophilicity of titanium ions.

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Controlled fabrication of freestanding monolayer SiC by electron irradiation

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Chinese Physics B 2024年第8期33卷 31-37页

作者：笪蕴力罗瑞春雷宝季威周武 School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China department of Physics and Beijing Key Laboratory of Optoelectronic Functional Materials&Micro-Nano devices Renmin University of ChinaBeijing 100872China

The design and preparation of novel quantum materials with atomic precision are crucial for exploring new physics and for device *** irradiation has been demonstrated as an effective method for preparing novel quantum materials and quantum structures that could be challenging to obtain *** features the advantages of precise control over the patterning of such new materials and their integration with other materials with different ***,we present a new strategy for fabricating freestanding monolayer SiC within nanopores of a graphene *** regulating the energy of the incident electron beam and the in-situ heating temperature in a scanning transmission electron microscope(STEM),we can effectively control the patterning of nanopores and subsequent growth of monolayer SiC within the graphene *** resultant SiC monolayers seamlessly connect with the graphene lattice,forming a planar structure distinct by a wide direct *** in-situ STEM observations further uncover that the growth of monolayer SiC within the graphene nanopore is driven by a combination of bond rotation and atom extrusion,providing new insights into the atom-by-atom self-assembly of freestanding two-dimensional(2d)monolayers.

关键词： monolayer SiC 2d semiconductor in-situ growth in-situ STEM defect engineering graphene nanopores

makeTwin:A reference architecture for digital twin software platform

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Chinese Journal of Aeronautics 2024年第1期37卷 1-18页

作者： Fei TAO Xuemin SUN Jiangfeng CHENG Yonghuai ZHU Weiran LIU Yong WANG Hui XU Tianliang HU Xiaojun LIU Tingyu LIU Zheng SUN Jun XU Jinsong bao Feng XIANG Xiaohui JIN digital Twin International Research Center International Research Institute for Multidisciplinary ScienceBeihang UniversityBeijing 100191China School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China Institute of Advanced Manufacturing and Intelligent Technology Beijing University of TechnologyBeijing 100124China RIAMB(Beijing)Technology development Co Ltd(R.T.D.)Beijing 100120China School of Mechanical Engineering Shandong UniversityJinan 250061China School of Mechanical Engineering Southeast UniversityNanjing 211189China School of Mechanical Engineering Xi’an Jiaotong UniversityXi’an 710049China College of Mechanical Engineering Donghua UniversityShanghai 201620China School of Machinery and Automation Wuhan University of Science and TechnologyWuhan 430081China Beijing Aero-top Hi-tech Co LtdBeijing 100176China

digital twin is currently undergoing a significant transformation from the conceptual and theoretical research phase to the implementation and application ***,a universally adaptable research and development platform for digital twin is critically needed to meet the development ***,a publicly accessible simulation,testing,and validation platform which can support digital twin model building,data processing,algorithm design,configuration,etc.,is urgently required for ***,for developers from the industry,a lowcode development platform that can offer a customizable suite of functions such as model creation,data management,protocol configuration,and visualization is urgently ***,for enterprise users,there is a lack of an application management platform that can be configured and migrated for various application scenarios,functions,and ***,based on the system research of digital twin theories and key technologies by the authors(such as the five-dimension digital twin model,digital twin modeling and digital twin data theory,digital twin standards,and so on),a digital twin software platform reference architecture,namely make Twin,is proposed and designed,as well as its ten core *** workflow of the make Twin and the interaction mechanisms among its core functions are ***,a digital twin application system for a chemical fiber textile shop floor(CFTS)which was developed according to make Twin,is introduced,which validates the proposed reference architecture.

关键词： digital twin digital twin software platform Industrial software makeTwin Reference architecture

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苏区戏剧的动员形态及大众化经验

文学评论 2024年第2期 215-223页

作者：包莹喀什大学人文学院

苏区戏剧运动充分发挥了社会动员这一红色文艺的核心功能,它的发展与根据地存亡息息相关,愈紧张的战时状态愈需要戏剧动员。中央苏区的戏剧工作最为成熟,化装宣传、新剧、活报、旧戏改编是其主要形式。苏区戏剧演出注重与民众互动,强调... 详细信息

苏区戏剧运动充分发挥了社会动员这一红色文艺的核心功能,它的发展与根据地存亡息息相关,愈紧张的战时状态愈需要戏剧动员。中央苏区的戏剧工作最为成熟,化装宣传、新剧、活报、旧戏改编是其主要形式。苏区戏剧演出注重与民众互动,强调当下与及时性,它将娱乐与教育、艺术与生活结合起来,将民众喜闻乐见的文艺形式与革命的思想内容有机融合起来,形成独特的“战斗”艺术。组织性、战斗性、群众性的文艺保证了社会动员,社会动员的推进则落实了文艺大众化。苏区戏剧实践与左翼戏剧运动存在巨大差异,全面抗战爆发后文艺的动员意义进一步凸显,苏区剧运的战时经验对抗战演剧及现代话剧的大众化、民族化探索具有重要参考价值。

关键词：苏区戏剧社会动员文艺动员文艺大众化

Magnetic resonance imaging-based lymph node radiomics for predicting the metastasis of evaluable lymph nodes in rectal cancer

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World Journal of Gastrointestinal Oncology 2024年第5期16卷 1849-1860页

作者： Yong-Xia Ye Liu Yang Zheng Kang Mei-Qin Wang Xiao-dong Xie Ke-Xin Lou Jun bao Mei du Zhe-Xuan Li department of Radiology The Affiliated Cancer Hospital of Nanjing Medical University&Jiangsu Cancer Hospital&Jiangsu Institute of Cancer ResearchNanjing 210011Jiangsu ProvinceChina department of Colorectal Surgery Jiangsu Cancer Hospital and Jiangsu Institute of Cancer Research and The Affiliated Cancer Hospital of Nanjing Medical UniversityNanjing 210000Jiangsu ProvinceChina1 department of Pathology The Affiliated Cancer Hospital of Nanjing Medical University&Jiangsu Cancer Hospital&Jiangsu Institute of Cancer ResearchNanjing 210011Jiangsu ProvinceChina Colorectal Center The Affiliated Cancer Hospital of Nanjing Medical University&Jiangsu Cancer Hospital&Jiangsu Institute of Cancer ResearchNanjing 210011Jiangsu ProvinceChina

BACKGROUNd Lymph node(LN)staging in rectal cancer(RC)affects treatment decisions and patient *** radiologists,the traditional preoperative assessment of LN metastasis(LNM)using magnetic resonance imaging(MRI)poses a *** To explore the value of a nomogram model that combines Conventional MRI and radiomics features from the LNs of RC in assessing the preoperative metastasis of evaluable *** In this retrospective study,270 LNs(158 nonmetastatic,112 metastatic)were randomly split into training(n=189)and validation sets(n=81).LNs were classified based on pathology-MRI *** MRI features[size,shape,margin,T2-weighted imaging(T2WI)appearance,and CE-T1-weighted imaging(T1WI)enhancement]were *** radiomics models used 3d features from T1WI and T2WI ***,a nomogram model combining conventional MRI and radiomics features was *** model used univariate analysis and multivariable logistic *** employed the receiver operating characteristic curve,with deLong test for comparing diagnostic *** performance was assessed using calibration and decision curve *** The nomogram model outperformed conventional MRI and single radiomics models in evaluating *** the training set,the nomogram model achieved an area under the curve(AUC)of 0.92,which was significantly higher than the AUCs of 0.82(Pd 0.89(Pd radiomics models,*** the validation set,the nomogram model achieved an AUC of 0.91,significantly surpassing 0.80(Pd 0.86(Pdel showed the best performance in predicting metastasis of evaluable LNs.

关键词： Radiomics Lymph node metastasis Rectal cancer Magnetic resonance imaging

High performance 2T0C dRAM cells based on atomic-layer-deposited InAlZnO FETs

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Science China(Information Sciences) 2024年第9期67卷 344-345页

作者： Wen XIONG Binbin LUO Wei MENG bao ZHU Xiaohan WU Shi-Jin dING School of Microelectronics Fudan University

Recently, the oxide semiconductor-based 2T0C dynamic random-access memory(dRAM) has shown great potential in monolithic three-dimensional(M3d)-integrated memory,owing to some unique advantages of oxide semiconductors,such as high electron mobility, wide band gap, and compatibility with back-end-of-line(BEOL) processes [1, 2].

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论宪法作为《民法典》的内容渊源——从“合宪性审查”与“利益法学”的正反视角

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湖北第二师范学院学报 2024年第4期41卷 40-46页

作者：宝冉额尔登中国政法大学民商经济法学院北京100088 甘肃政法大学法学院兰州730070

“依据宪法,制定民法”的具体内涵问题,涉及到“宪法是否为民法的内容渊源”这一极其重要的“宪民关系问题”,并争论至今。采取了正反两条分析进路:从反面推论而言“合宪性审查”角度看,“根据宪法,制定民法”构成对《民法典》进行合宪... 详细信息

“依据宪法,制定民法”的具体内涵问题,涉及到“宪法是否为民法的内容渊源”这一极其重要的“宪民关系问题”,并争论至今。采取了正反两条分析进路:从反面推论而言“合宪性审查”角度看,“根据宪法,制定民法”构成对《民法典》进行合宪性审查的前提,反之,如果能够证明可以对《民法典》内容进行合宪性审查,那便意味着宪法与《民法典》之间存在内容连接;从正面推论而言,“利益法学”角度看,《民法典》亦为民事立法者对相互冲突的利益进行评价的产物,而在法治国家的背景下,宪法的规则、原则与精神必然是重要的利益评价标准,从而使宪法与《民法典》之间产生内容连接。虽然在应然层面,根据宪法所制定之《民法典》具有天然合宪性,但也将不可避免地面临现实层面的合宪性危机,而合宪性解释,便是消解此“二律背反困境”的重要途径。

关键词：依宪立法合宪性审查内容渊源利益法学