A5077392999- Stochastic processes and statistical mechanics
- Phytochemical compounds biological activities
- Natural product bioactivities and synthesis
- Traditional and Medicinal Uses of Annonaceae
- Markov Chains and Monte Carlo Methods
- Theoretical and Computational Physics
- Crystallization and Solubility Studies
- Natural Compound Pharmacology Studies
- X-ray Diffraction in Crystallography
- Geometric and Algebraic Topology
- Plant biochemistry and biosynthesis
- Topological and Geometric Data Analysis
- Adversarial Robustness in Machine Learning
- Phytochemistry and Biological Activities
- Topic Modeling
- Natural Language Processing Techniques
- Mathematical Dynamics and Fractals
- Advanced Algorithms and Applications
- Machine Learning in Healthcare
- Random Matrices and Applications
- Sesquiterpenes and Asteraceae Studies
- Additive Manufacturing and 3D Printing Technologies
- Synthesis of Organic Compounds
- Privacy-Preserving Technologies in Data
- Graph theory and applications
Sichuan University
2025
China Pharmaceutical University
2019-2024
Guizhou University
2023-2024
China Academy of Engineering Physics
2023-2024
Emory University
2020-2024
Nankai University
2024
Tianjin University
2023-2024
China Electric Power Research Institute
2024
North China Electric Power University
2024
State Key Laboratory of Natural Medicine
2019-2023
The first examples of type B polycyclic polyprenylated acylphloroglucinols with a bicyclo[5.3.1]hendecane core, hyperberins A (1) and (2), were isolated from Hypericum beanii, together three biosynthetic congeners. Their structures established by combination NMR, electric circular dichroism (ECD), X-ray diffraction analyses. These isolates indicated divergent cationic cyclization as key steps in the biosynthesis PPAPs diverse architectures. Compounds 1 2 moderately cytotoxic exhibited...
Comprehensive Summary Spirolindemers A and B, unprecedented lindenane sesquiterpenoid dimer (1) trimer (2) equipped with oxaspiro[4.5]decane unit, were discovered from the medicinal plant Chloranthus henryi . Their structures including absolute configurations achieved by HRMS, NMR, ECD, X‐ray diffraction analyses, quantum chemical calculations. Biogenetically, hetero‐ homo‐Diels‐Alder additions may dominate formation of spiro[4.5]decane skeletons, respectively. Compound 1 showed...
In recent years, with the increasingly serious problems of resource shortage and environmental pollution, exploration development underwater clean energy were particularly important. At same time, abundant resources species have attracted a large number scientists to carry out research on underwater-related tasks. Due diversity complexity environments, it is difficult perform related vision tasks, such as target detection capture. The digital image technology has been relatively mature,...
We consider two combinatorial models on bunkbed graphs: maximum flow and self-avoiding walks. A graph is defined as the Cartesian product $G\times K_2$, where $G$ a finite $K_2$ complete vertices, labelled $0$ $1$. For problem, we show that if K_2$ has non-negative, reflection-symmetric edge capacities, then for any $u, v\in V(G)$, strength from $(u,0)$ to $(v,0)$ in at least large $(v,1)$. walk model investigate whether there are more walks $(v,1)$ than $(v,0)$. prove this holds when...
Main observation and conclusion Sarcaglarols A—D ( 1 — 4 ), two pairs of lindenane−monoterpene heterodimers fused by a 1,2‐dioxane moiety, were discovered isolated from the leaves Sarcandra glabra guided MS/MS molecular networking‐based strategy. Their planar structures, absolute configurations basic skeleton flexible polyhydric side chain established analysis HRESIMS, NMR spectroscopic data, ECD spectrum, X‐ray diffraction study isopropylidene derivatives. An intermolecular [2+2+2]...
Compared to the widely concerned azo bridges (-NN-), triazene (-NN-NH-) with longer nitrogen chains are also favorable linking units leading novel energetic materials. In this work, a new family of nitrogen-rich nitrotriazolate-based compounds bridge were synthesized and well characterized. The experimental results indicated that most these have good thermal stabilities low sensitivities. Among these, ammonium 5,5'-dinitro-3,3'-triazene-1,2,4-triazolate (3) potassium...
The robustness and security of natural language processing (NLP) models are significantly important in real-world applications. In the context text classification tasks, adversarial examples can be designed by substituting words with synonyms under certain semantic syntactic constraints, such that a well-trained model will give wrong prediction. Therefore, it is crucial to develop techniques provide rigorous provable guarantee against attacks. this paper, we propose WordDP achieve certified...
In this work, 26 methylated acylphloroglucinol meroterpenoids with diverse skeletons, including 18 new ones (bellumones A-R, 1–18), were identified from the flowers of Hypericum bellum. Their structures absolute configurations elucidated by detailed spectroscopic data, calculated electronic circular dichroism (ECD), and X-ray diffraction (XRD). Through methylation at C-5, prenylation different chain lengths acylphloroglucinol-derived core, along types secondary cyclization, type A bicyclic...
Inspired by the biosynthetic fragment (<bold>9</bold>), first example of rearranged dimethylated acylphloroglucinol and monoterpene adducts, elodeoidins A–H (<bold>1–8</bold>) representing four skeletons two pathways were authenticated from <italic>H. elodeoides</italic>.
Abstract The strain-temperature cross-sensitivity problem easily occurs in the engineering strain monitoring of self-sensing embedded with fiber Bragg grating (FBG) sensors. In this work, a theoretical investigation has been performed using temperature reference method. To experimentally observe and theoretically verify problem, substrate materials, preloading technique, FBG initial central wavelength were taken as main parameters. And series sensitivity coefficients calibration tests...
Great efforts have been devoted to improving the performance of scene classification. However, it is still a challenging task because complex background and diverse objects in images. To address this issue, multiple resolution block feature (MRBF) proposed for remote-sensing It unified effective representation, consisting completed double cross pattern (CDCP) combined with fisher vectors (FV). Specifically, order capture more robust richer information, descriptor devised based on CDCP. After...
Comprehensive Summary Twenty‐two new limonoids, mufolinoids A—V (1—22), including six rings A, B‐ seco limonoids (1—6), twelve ring A‐ (7—18), four ring‐intact (19—22), together with thirteen known compounds (23—35) were isolated from Munronia unifoliolata . Their structures absolute configurations elucidated by combination of NMR, HR‐MS, single‐crystal X‐ray diffraction and calculations ECD NMR technologies. Compounds 24, 25, 33, 34 could be significantly reversed the multidrug resistance...