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Finite groups with permutable Hall subgroups

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Frontiers of Mathematics in China 2017年第5期12卷 1265-1275页

作者： xia yin Nanying YANG School of Science Jiangnan University Wuxi 214122 China

Throughout this paper, all groups are finite and G always denotes a finite group. We use π（G） to denote the set of all primes dividing ｜G｜. A subgroup A of G is said to permute with a subgroup B if AB = BA. In th... 详细信息

关键词： Finite group Hall subgroup complete Hall or-set permutablesubgroup supersoluble group

Tao-Hong-Si-Wu Decoction promotes angiogenesis after cerebral ischaemia in rats via platelet microparticles

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Chinese Journal of Natural Medicines 2020年第8期18卷 620-627页

作者： CHEN Fang-Fang WANG Meng-Meng xia Wen-Wen PENG Dai-yin han Lan School of Pharmacy Anhui University of Chinese MedicineHefei 230012China Anhui Province Key Laboratory of Chinese Medicinal Formula Hefei 230012China Key Laboratory of Xin’an Medicine Ministry of EducationAnhui University of Chinese MedicineHefei 230012China

Platelet microparticles(PMPs)are membrane particles derived from the platelet membrane that enter into the blood *** sought to explore the therapeutic effects of Tao-Hong-Si-Wu Decoction(THSWD)on angiogenesis in a rat model of cerebral ischaemia-reperfusion(I/R).The protective effect of THSWD on I/R rats was observed morphologically by immunohistochemical expression of VEGF and CD34,along with immunofluorescence results of co-expression of Brd U and v ***,PMPs from different groups of rats were extracted,and cytokine array analysis was used to screen for angiogenesis associated *** results showed that THSWD can promote the expression of VEGF,CD34,Brd U and v *** array analysis revealed the changes in the expression of 29 related angiogenic proteins in the total protein of PMPs,which involved the Notch signalling *** with model group,the expression levels of NICD and Hes-1 in the THSWD group were significantly *** the context of I/R,the angiogenesis-related proteins of PMPs are *** may involve the promotion of activation of the Notch signalling pathway to achieve therapeutic effects on cerebral ischaemia.

关键词： Tao-Hong-Si-Wu Decoction Platelet microparticles Cerebral ischaemia–reperfusion Angiogenesis

Understanding primary and secondary sources of ambient oxygenated volatile organic compounds in Shenzhen utilizing photochemical age-based parameterization method

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Journal of Environmental Sciences 2019年第1期31卷 105-114页

作者： Bo Zhu Yu han Chuan Wang xiaofeng Huang Shiyong xia yingbo Niu Zixuan yin Lingyan He Key Laboratory for Urban Habitat Environmental Science and Technology School of Environment and Energy Peking University Shenzhen Graduate School

Oxygenated volatile organic compounds(OVOCs) are key intermediates in the atmospheric photooxidation process. To further study the primary and secondary sources of OVOCs,their ambient levels were monitored using a proton-transfer reaction mass spectrometer(PTR-MS) at an urban site in the Pearl River Delta of China. Continuous monitoring campaigns were conducted in the spring, summer, fall, and winter of 2016. Among the six types of OVOC species, the mean concentrations of methanol were the highest in each season(up to 13–20 ppbv), followed by those of acetone, acetaldehyde and acetic acid(approximately 2–4 ppbv), while those of formic acid and methyl ethyl ketone(MEK) were the lowest(approximately 1–2 ppbv). As observed from a diurnal variation chart, the OVOCs observed in Shenzhen may have been affected by numerous factors such as their primary and secondary sources and photochemical consumption. The photochemical age-based parameterization method was used to apportion the sources of ambient OVOCs. Methanol had significant anthropogenic primary sources but negligible anthropogenic secondary sources during all of the seasons. Acetone, MEK and acetic acid were mostly attributed to anthropogenic primary sources during each season with smaller contributions from anthropogenic secondary sources. Acetaldehyde had similar contributions from both anthropogenic secondary and anthropogenic primary sources throughout the ***, anthropogenic primary sources contributed the most to formic acid.

关键词： OVOCs PTR-MS Photochemical age-based parameterization method

Recovery of copper from copper slag using a microbial fuel cell and characterization of its electrogenesis

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International Journal of Minerals,Metallurgy and Materials 2017年第6期24卷 621-626页

作者： Wei-ping Liu xia-fei yin School of Chemistry and Environment Engineering Jiangsu University of Technology School of Environment and Civil Engineering Jiangnan University

The microbial fuel cell, which can convert the chemical energy of organic matter into electricity via the catalytic action of microorganisms, is a novel environmentally friendly technology for wastewater treatment and energy generation. The electrical energy generated by the microbial fuel cell can be used as an alternative to a traditional external power source required to extract copper via electrolytic treatment. A dual-chamber microbial fuel cell(DMFC) for the treatment of copper slag sulfuric acid leach liquor was constructed. The electrogenesis performance of the DMFC and its ability to extract copper from the copper slag leachate were investigated. The results demonstrated that the maximum voltage was 540 mV when the DMFC achieved steady-state operation. The removal rate of copper ions was greater than 80.0%, and the maximum value was 92.1%. Moreover, X-ray diffraction and scanning electron microscopy were used to characterize the cathodal products. The results showed that the product deposited onto the cathode was copper and that its morphology was similar to that of the electrolytic copper powder. The DMFC can generate electricity and recover copper from copper slag simultaneously.

关键词： microbial fuel cells copper slag recovery copper electrogenesis

Effects of Nonylphenol on Brain Gene Expression Profiles in F1 Generation Rats

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Biomedical and Environmental Sciences 2008年第1期21卷 1-6页

作者： yin-yin xia PING Zhan YANG WANG Department of Environment Hygiene Chongqing University of Medical Sciences Chongqing 400016 China

Objective To explore the effects of nonylphenol on brain gene expression profiles in F1 generation rats by microarray technique. Methods mRNA was extracted from the brain of 2-day old F1 generation male rats whose F0 female generation was either exposed to nonylphenol or free from nonylphenol exposure, and then it was reversely transcribed to cDNA labeled with cy5 and cy3 fluorescence. Subsequently, cDNA probes were hybridized to two BiostarR-40S cDNA gene chips and fluorescent signals of cy5 and cy3 were scanned and analyzed. Results Two genes were differentially down-regulated. Conclusion Nonylphenol may disturb the neuroendocrine function of male rats when administered perinatally.

关键词： Nonylphenol cDNA microarray Brain tissue

Large-scale synthesis of nickel sulfide micro/nanorods via a hydrothermal process

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International Journal of Minerals,Metallurgy and Materials 2015年第7期22卷 762-769页

作者： Peng-fei yin xiang-yu han Chao Zhou Chuan-hui xia Chun-lian Hu Li-li Sun College of Science Chongqing Jiaotong University Department of Materials Science Chongqing Jiaotong University Department of Physics Third Military Medical University

Rhombohedral-phase NiS micro/nanorods were synthesized on a large scale through a hydrothermal method using NiCl2·6H2O and thiourea crystals as starting precursors. Recrystallized thiourea was observed to play an important role in the formation of mi- cro/nanosized rods and flower-like structures. The molar ratio and reaction temperature of the precursors influenced the morphology and phase of NiS products. Pure rhombohedral NiS micro/nanorods were obtained on a large scale when the molar ratio between NiCl2·6H2O and thiourea crystals was fixed at 2：1, and the mixture was heated at 250℃ for 5 h. Flower-like NiS nanostructures were formed when the molar ratio between NiCl2·6H2O and thiourea crystals was maintained at 1：1. The Raman and Fourier-transform infrared （FTIR） spectra of the as-prepared rhombohedral NiS micro/nanorods were collected, and their magnetic properties were investigated. The results showed that the FTIR absorption peaks of the as-prepared product are located at 634 cm^-1 and their Raman peaks are located at 216 and 289 cm^-1; the as-prepared NiS micro/nanorods exhibited weak ferromagnetic behavior due to the size effect.

关键词： nickel sulfide nanorods hydrothermal synthesis optical properties magnetic measurement

A Cascade Model-Aware Generative Adversarial Example Detection Method

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Tsinghua Science and Technology 2021年第6期26卷 800-812页

作者： Keji han Yun Li Bin xia School of Computer Science Nanjing University of Posts and TelecommunicationsNanjing 210046China

Deep Neural Networks(DNNs) are demonstrated to be vulnerable to adversarial examples, which are elaborately crafted to fool learning models. Since the accuracy and robustness of DNNs are at odds for the adversarial training method, the adversarial example detection algorithms check whether the specific example is adversarial, which is promising to solve the issue of the adversarial example. However, among the existing methods,model-aware detection methods do not generalize well, while the detection accuracies of the generative-based methods are lower compared to the model-aware methods. In this paper, we propose a cascade model-aware generative adversarial example detection method, namely CMAG. CMAG consists of two first-order reconstructors and a second-order reconstructor, which can illustrate what the model sees to the human by reconstructing the logit and feature maps of the last convolution layer. Experimental results demonstrate that our method is effective and is more interpretable compared to some state-of-the-art methods.

关键词： information security Deep Neural Network(DNN) adversarial example detection

Dynamic Pricing Model of E-Commerce Platforms Based on Deep Reinforcement Learning

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Computer Modeling in Engineering & Sciences 2021年第4期127卷 291-307页

作者： Chunli yin Jinglong han College of Economics and Administration Tonghua Normal UniversityJilin130000China Department of Administration Section Tonghua Normal UniversityJilin130000China

With the continuous development of artificial intelligence technology,its application field has gradually *** further apply the deep reinforcement learning technology to the field of dynamic pricing,we build an intelligent dynamic pricing system,introduce the reinforcement learning technology related to dynamic pricing,and introduce existing research on the number of suppliers(single supplier and multiple suppliers),environmental models,and selection algorithms.A two-period dynamic pricing game model is designed to assess the optimal pricing strategy for e-commerce platforms under two market conditions and two consumer participation *** first step is to analyze the pricing strategies of e-commerce platforms in mature markets,analyze the optimal pricing and profits of various enterprises under different strategy combinations,compare different market equilibriums and solve the Nash ***,assuming that all consumers are naive in the market,the pricing strategy of the duopoly e-commerce platform in emerging markets is *** comparing and analyzing the optimal pricing and total profit of each enterprise under different strategy combinations,the subgame refined Nash equilibrium is ***,assuming that the market includes all experienced consumers,the pricing strategy of the duopoly e-commerce platform in emerging markets is analyzed.

关键词： Deep reinforcement learning e-commerce platform dynamic evaluation game model pricing strategy

Industry news:the additive manufacturing of nerve conduits for the treatment of peripheral nerve injury

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Bio-Design and Manufacturing 2022年第1期5卷 6-8页

作者： ying han Jun yin The State Key Laboratory of Fluid Power and MechatronicSystems School of Mechanical EngineeringZhejiangUniversityHangzhou 310028China Key Laboratory of 3D Printing Process and Equipmentof Zhejiang Province School of Mechanical EngineeringZhejiang UniversityHangzhou 310028China

Peripheral nerve injury and nerve conduit manufacturing The global nerve injury repair and regeneration market is expected to reach$9.7 billion by 2025,a compound annual growth rate of 9.1%between 2020 and 2025[1].One component alone,peripheral nerve injury(PNI),encompasses 5 million new cases worldwide every year[2].Although nerve autograft is considered the gold standard for PNI repair,this process sufers because of a short supply of autologous nerves as well as potential harm caused to the *** recent decades,as a promising alternative to autografts。

关键词： injury nerves additive