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Improved Bound of the Fourth Hankel Determinant for a Class of Analytic Functions with Bounded Turnings Involving Cardioid Domain

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Journal of Mathematical Research with Applications 2025年第1期 39-55页

作者： Dong GUO Huo tang Xi LUO Zongtao LI School of Mathematical Sciences Yangzhou Polytechnic College College of Mathematics and Computer Science Chifeng University School of Mathematics Jiaying University Department of Mathematics Teaching Guangzhou Civil Aviation College

In the paper, a class of functions with bounded turnings involving cardioid domain,are studied in the region of the unit disc. The bounds of |a5|, |a6|, |a7| and the fourth Hankel determinant are obtained, which are m...

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基于热处理工艺的拖拉机发动机铝合金组织性能研究

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农机化研究 2025年第1期47卷 243-247页

作者：汤金金李好娜济源职业技术学院河南济源454650 郑州大学济源研究院河南济源454650

采用不同时长的热处理工艺,对拖拉机发动机铝合金组织性能进行了对比分析。结果表明:热处理后,铝合金性能得到了较大程度的提高,若优先考虑材料性能,则应该采用180℃×4 h的单级热处理时效;若优先考虑工艺效率和成本,则可以采用150℃×1... 详细信息

采用不同时长的热处理工艺,对拖拉机发动机铝合金组织性能进行了对比分析。结果表明:热处理后,铝合金性能得到了较大程度的提高,若优先考虑材料性能,则应该采用180℃×4 h的单级热处理时效;若优先考虑工艺效率和成本,则可以采用150℃×1 h+170℃×1 h的双级热处理时效。

关键词：热处理工艺拖拉机发动机铝合金组织性能

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Unraveling the mechanism of action of Shangxia Liangji formula for treating insomnia:a metabolomics and network pharmacology approach

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Traditional Medicine Research 2025年第2期10卷 16-29页

作者： Xia-Jie Quan Hao Liang Yong-Hong tang Li Jiang Xiong-Ying Ji Feng-Ying Zhang Ping Zhang Bo Ouyang Department of Information The Affiliated Nanhua HospitalHengyang Medical SchoolUniversity of South ChinaHengyang 421002China Department of Neurology The Affiliated Nanhua HospitalHengyang Medical SchoolUniversity of South ChinaHengyang 421002China Department of Gastroscopy The Affiliated Nanhua HospitalHengyang Medical SchoolUniversity of South ChinaHengyang 421002China Department of Traditional Chinese Medicine The Affiliated Nanhua HospitalHengyang Medical SchoolUniversity of South ChinaHengyang 421002China

Background:Insomnia is a prevalent clinical condition and Shangxia Liangji formula(SXLJF)is a well-established method of ***,the specific mechanism of action of SXLJF remains ***:The mouse model of insomnia was established by intraperitoneal injection of ***-two mice were randomly divided into a negative control group,model group,SXLJF group(18.72 g/kg/day),and positive control group(diazepam,2 mg/kg)and treated with the corresponding drugs for 7 consecutive *** open field test and pentobarbital-induced sleeping test were ***-MS-based untargeted metabolomics and network pharmacology were applied to explore the potential targets of SXLJF for treating ***,key targets were validated using ***:Behavioral tests demonstrated that SXLJF reduced the total distance,average velocity,central distance,and sleep latency,and prolonged sleep *** and network pharmacology revealed potential targets,signaling pathways,metabolic pathways,and metabolites associated with the anti-insomnia effects of ***,tyrosine hydroxylase(TH)and tyrosine metabolism emerged as crucial metabolic pathways and targets,***-qPCR results supported the role of TH in the mechanism of SXLJF in treating ***:In conclusion,TH and tyrosine metabolism may represent significant targets and pathways for SXLJF in treating insomnia.

关键词： Shangxia Liangji formula insomnia metabolomics network pharmacology tyrosine hydroxylase tyrosine metabolism

Cuprate-like electronic structures in infinite-layer nickelates with substantial hole dopings

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National Science Review 2024年第8期11卷 180-186页

作者： Xiang Ding Yu Fan Xiaoxiao Wang Chihao Li Zhitong An Jiahao Ye Shenglin tang Minyinan Lei Xingtian Sun Nan Guo Zhihui Chen Suppanut Sangphet yilin Wang Haichao Xu Rui Peng Donglai Feng Advanced Materials Laboratory State Key Laboratory of Surface Physics and Department of Physics Fudan University School of Emerging Technology University of Science and Technology of China New Cornerstone Science Laboratory University of Science and Technology of China Shanghai Research Center for Quantum Sciences National Synchrotron Radiation Laboratory and School of Nuclear Science and Technology University of Science and Technology of China

Superconducting infinite-layer（IL） nickelates offer a new platform for investigating the long-standing problem of high-temperature *** models were proposed to understand the superconducting mechanism of nickelates based on the calculated ele ctronic structure,and the multiple Fermi surfaces and multiple orbitals involved create complications and controversial *** the past five years,the lack of direct measurements of the electronic structure has hindered the understanding of nickelate *** we fill this gap by directly resolving the electronic structures of the parent compound LaNiO2and superconducting La0.8Ca0.2NiO2using angle-resolved photoemission *** find that their Fermi surfaces consist of a quasi-2D hole pocket and a 3D electron pocket at the Brillouin zone corner,whose volumes change upon Ca *** Fermi surface topology and band dispersion of the hole pocket closely resemble those observed in hole-doped ***,the cuprate-like band exhibits significantly higher hole doping in superconducting La0.8Ca0.2NiO2compared to superconducting cuprates,highlighting the disparities in the electronic states of the superconducting *** observations highlight the novel aspects of the IL nickelates,and pave the way toward the microscopic understanding of the IL nickelate family and its superconductivity.

关键词： unconventional superconductivity nickelate superconductors oxide MBE ARPES electronic structure superconducting phase diagram

Revolutionizing breast cancer detection:Advances in fluorescent probe technology

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Nano Research 2025年第1期18卷 653-674页

作者： Qian Gao Lin tang Jun Zhan Yiyuan Xue Feng Luo State Key Laboratory of Oral Diseases&National Center for Stomatology&National Clinical Research Center for Oral Diseases West China Hospital of StomatologySichuan UniversityChengdu 610041China Emergency Obstetrics and Gynecology West China Second University HospitalSichuan UniversityChengdu 610041China Department of Obstetrics and Gynecology West China Second University HospitalSichuan UniversityChengdu 610041China Department of Prosthodontics West China School of StomatologySichuan UniversityChengdu 610041China

With the increasing incidence of breast cancer globally,there is an urgent demand for enhanced diagnostic and therapeutic *** comprehensive review explores advancements in fluorescent probe technology for breast cancer imaging and early *** probes offer unparalleled sensitivity and specificity in detecting cancer biomarkers,enabling early diagnosis and delineation of tumor margins during *** categorize these probes into molecular,nano,ratiometric,the second near-infrared window(NIR-II),and multifunctional varieties,each with unique capabilities for targeting specific cancer *** review highlights recent innovations in probe design,emphasizing their applications in pathogenesis studies,drug development,precision medicine,and fluorescence-guided *** their promising clinical potential,challenges such as safety,biomarker targeting accuracy,system compatibility,and clinical translation *** these hurdles is crucial for the integration of fluorescent probes into standard cancer care,aiming to improve treatment outcomes and patient quality of life.

关键词： breast cancer fluorescent probes imaging early diagnosis biomarker

Waterborne sub-lethal exposure to perfluorobutanesulfonate causes intestinal dysbiosis in tadpoles of Lithobates catesbeianus

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Water Biology and Security 2022年第4期1卷 96-104页

作者： yilin Shu Luting Wei Huiling Jiang Wenchao Wang Huijuan Zhang Lizhu tang Jun He Kanghua Jiang Hailong Wu Lianguo Chen State Key Laboratory of Freshwater Ecology and Biotechnology Institute of HydrobiologyChinese Academy of SciencesWuhan430072China Collaborative Innovation Center of Recovery and Reconstruction of Degraded Ecosystem in Wanjiang Basin Co-founded by Anhui Province and Ministry of Education School of Ecology and EnvironmentAnhui Normal UniversityWuhu241002China

Perfluorobutanesulfonate (PFBS) is a ubiquitous pollutant in the aquatic environment, but its toxic effects andmechanisms on amphibian species remain largely unknown. In the present study, tadpoles (Lithobates catesbeianus) were exposed to various concentrations of PFBS (0, 1, 3, 10, and 30 μg/L) for 14 days, with the goal ofunveiling the impairment of intestinal health. Histopathological examination showed that sub-lethal exposure oftadpoles to PFBS at concentrations as low as 3 μg/L could result in the injury of intestinal structures. In a clearconcentration-dependent manner, the expressions of epithelial barrier components (i.e., Claudin 1 gene and tightjunction protein 2) were significantly decreased in PFBS-exposed intestines, while the intestinal content oflipopolysaccharide (LPS) and transcriptions of downstream responsive genes (e.g., TLR4, MyD88, and NF-κB) wereconcurrently significantly increased by exposure to 3, 10, and 30 μg/L of PFBS. As a consequence, the number ofeosinophils and expression of pro-inflammatory cytokines (e.g., IL-1β and TNF-α) were increased ***, PFBS exposure induced oxidative stress in intestinal tissues by increasing the level of reactive oxygen species (ROS) and suppressing antioxidant capacity. The transcriptional levels of CytoC and Bax genes aswell as activities of caspase 9 and caspase 3 enzymes were remarkably increased, while the transcript abundanceof Bcl-2 was down-regulated significantly after PFBS exposure, thereby favoring apoptosis in tadpole *** sub-lethal exposure also drove the composition of intestinal microbiota to a dysbiosis status. Correlationanalysis further revealed that the relative abundance of members of the genus Bosea was positively related withthe contents of LPS and IL-1β. Overall, the present study provides the first evidence for pronounced impacts ofPFBS on amphibian intestinal ecology, highlighting the susceptibility of tadpoles to the environmental risks ofPFBS.

关键词： Amphibian Inflammation Intestinal barrier Intestinal microbiota Oxidative stress PFBS

Sulfur-driven methylmercury production in paddies continues following soil oxidation

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Journal of Environmental Sciences 2022年第9期34卷 166-174页

作者： Wenli tang Chao tang Pei Lei School of the Environment State Key Laboratory of Pollution Control and Resource ReuseNanjing UniversityNanjing 210023China School of Environment Nanjing Normal UniversityNanjing 210023China

Methylmercury(MeHg) production in paddy soils and its accumulation in rice raise global concerns since rice consumption has been identified as an important pathway of human exposure to MeHg. Sulfur(S) amendment via fertilization has been reported to facilitate Hg methylation in paddy soils under anaerobic conditions, while the dynamic of S-amendment induced MeHg production in soils with increasing redox potential remains unclear. This critical gap hinders a comprehensive understanding of Hg biogeochemistry in rice paddy system which is characterized by the fluctuation of redox potential. Here, we conducted soil incubation experiments to explore MeHg production in slow-oxidizing paddy soils amended with different species of S and doses of sulfate. Results show that the elevated redox potential(1) increased MeHg concentrations by 10.9%-35.2%, which were mainly attributed to the re-oxidation of other S species to sulfate and thus the elevated abundance of sulfatereducing bacteria, and(2) increased MeHg phytoavailability by up to 75% due to the reductions in acid volatile sulfide(AVS) that strongly binds MeHg in soils. Results obtained from this study call for attention to the increased MeHg production and phytoavailability in paddy soils under elevated redox potentials due to water management, which might aggravate the MeHg production induced by S fertilization and thus enhance MeHg accumulation in rice.

关键词： Mercury Sulfur Availability Mercury methylation Rice

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Boundary-effect and scale-heating rate equivalence effect of cracking behavior in the rock models subjected to heating from the central borehole

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Science China(Technological Sciences) 2020年第5期63卷 809-818页

作者： HUANG Xin tang ShiBin tang ChunAn State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116024China

Thermal cracking is broadly observed in rock engineering.A finite element numerical model which considers the heterogeneity of rock materials and the damage evolution process was used to simulate the thermal cracking behavior of square rock samples heated from the central *** thermal and mechanical behaviors of two cases,i.e.,the case with large size but low heating rate and the case with small size but high heating rate were compared to study the crack initiation location in the models with different model sizes and heating *** simulated stress and temperature fields,as well as the failure pattern,were in good agreement with the experimental *** temperature and thermal stress distribution during the heating process in both cases indicated that high tensile stress was concentrated around the thermal gradient front,which resulted in the cracks initiating at the location with a certain distance away from the *** results show that under the same heating rate,crack initiation location moves outwards with the increment of the model size then remains approximately at one location,which reflects the ***,the results indicate that the relative crack initiation locations in two cases are nearly the same if the ratio between the heating rate in two cases(Tx/Ty)nearly equal to the square of the inverse ratio of corresponding model side lengths((ay/ax)2).This concept is named the scale-heating rate equivalence effect in this *** is beneficial for studying thermal cracking of rock both numerically and experimentally since the model size can be significantly decreased.

关键词： thermal cracking nuclear waste disposal numerical simulation boundary-effect scale-heating rate equivalence effect

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Strategies for improving fertilizer phosphorus use efficiency in Chinese cropping systems

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Frontiers of Agricultural Science and Engineering 2019年第4期6卷 341-347页

作者： Gu FENG Jingping GAI Xionghan FENG Haigang LI Lin ZHANG Keke YI Jialong LV Yiyong ZHU Li tang yilin LI College of Resources and Environmental Sciences China Agricultural UniversityBeijing 100193China College of Resources and Environment Huazhong Agricultural UniversityWuhan 430070China Key Laboratory of Plant Nutrition and Fertilizer Ministry of AgricultureInstitute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081China College of Natural Resources and Environment Northwest A&F UniversityYangling 712100China College of Resources and Environmental Sciences Nanjing Agricultural UniversityNanjing 210095China College of Resources and Environmental Sciences Yunnan Agricultural UniversityKunming 650201China State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China

A four-year project,entitled"The mechanisms of fraction transformation and high use efficiency of P fertilizer in Chinese cropping systems"commenced in *** project was established to answer three key questions and looked at 17 cropping systems on ten ***,we asked what are the dynamics of transformation,fixation and mobilization of P fertilizers in soil-cropping systems?Second,what are the mechanisms of soil-cropmicrobe interactions by which P fertilizer can be efficiently used?Third,how to manipulate the processes of P use in cropping systems?The targets of this project are(1)to explore the mechanisms of P fixation,the pathways of loss of P availability and the threshold of migration of fertilizer P in the field;(2)to uncover mechanisms by which soil legacy P is mobilized through root physiological and morphological processes and through arbuscular mycorrhizal fungi and P-solubilizing bacteria in rhizosphere and hyphosphere;(3)to estimate the biological potential of crops for high efficiency P absorption and use;(4)to innovate new approaches for improving the efficiency of P *** outcomes will provide theoretical support for setting standards for limitation of P fertilizer application rate in the main cropping zones of China.

关键词： fixation mobilization phosphorus fertilizer rhizosphere transformations utilization

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