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Variation in reproductive life-history traits of Chinese Bulbuls(Pycnonotus sinensis)along the urbanization gradient in Hangzhou,China

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Avian Research 2023年第2期14卷 174-181页

作者： Xingmin chen Qin Zhang Sisi Lan Qin Huang Shuihua chen Yanping Wang Laboratory of Island Biogeography and Conservation Biology College of Life SciencesNanjing Normal UniversityNanjing210023China College of Chemistry and Life Sciences Zhejiang Normal UniversityJinhua321004China Zhejiang Museum of Natural History Hangzhou310012China Zhejiang Provincial Museum Hangzhou310007China

Urbanization brings new selection pressures to wildlife living in cities,and changes in the life-history traits of urban species can reflect their responses to such *** date,most of the studies investigating the impacts of urbanization on avian life-history traits are conducted in Europe and North America,while such studies are often lacking in quickly developing countries in Asia(e.g.,China).In this study,we examined the variations in reproductive life-history traits of Chinese Bulbuls(Pycnonotus sinensis)along the urbanization gradient in Hangzhou,*** detected 234 natural nests of Chinese Bulbuls and continuously monitored them in two continuous breeding seasons from 2012 to *** collected data on seven life-history traits(laying date,incubation period,nestling period,clutch size,egg volume,hatching success rate,and fledging success rate).We used infrared cameras to record the number of feedings per hour as the measure of food resources for the *** measured nest predation pressure by monitoring 148 natural breeding nests during breeding seasons and 54 artificial nests immediately after breeding *** then calculated the urbanization synthetic index(USI)as a measure of the level of urbanization and examined its relationship with the seven life-history *** found that Chinese Bulbuls laid eggs significantly earlier with increasing ***,the other six life-history traits did not vary significantly with the ***,the feeding frequency of chicks increased significantly with the USI,but the nest predation pressure of Chinese Bulbuls decreased significantly with the *** food resources and reduced nest predation pressure in cities may lead to earlier laying date of Chinese *** study should test whether the earlier laying date of Chinese Bulbuls is the result of phenotypic plasticity or genetic change.

关键词： Feeding frequency Laying date Life-history trait Nest predation Urbanization Urbanization synthetic index(USI)

Structure and Electrical Properties of(Na_(0.5)Bi_(0.5))_(0.94)Ba_(0.06)TiO_3 Ceramic with 0.5 wt% of MnO

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Journal of Wuhan University of Technology(Materials Science) 2008年第4期23卷 499-502页

作者： LIU Weihua XU Qing chen Wen chen Min KIM Bokhee School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 China Faculty of Advanced Materials Engineering Chonbuk National University Chonju 561756 Korea

The structure and electrical properties of （Na0.5Bi0.5）0.94Ba0.06TiO3 ceramic doped with 0.5 wt% of MnO were investigated in comparison with those of （Na0.5Bi0.5）0.94Ba0.06TiO3 ceramic. It was ascertained that the MnO addition did not cause remarkable change in crystal structure and microstructure. The MnO addition mainly displayed a hard effect on the electrical properties, an increase of coercive field （E） and mechanical quality factor （Qm） together with a decrease of dielectric constant （εr） and piezoelectric constant （d33）. An enhancement of electromechanical coupling factor （kp） with the MnO addition was obtained too. An essential relation between the piezoelectric properties and ferroelectric nature of the ceramics was detected. It was found that the piezoelectric properties of the ceramics highly depended on the corporative contribution of remanent polarization （Pt） and coercive field.

关键词： ceramics oxides crystal structure piezoelectricity ferroelectricity

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宋代湘江流域人口变迁研究

语言与文化研究

语言与文化研究 2025年第1期33卷 241-245页

作者：陈涛周方高湖南科技大学湘潭411201

湘江流域地区的人口在宋代发生了巨大的变迁。在经济发展与移民迁入的影响下,湘江流域人口数量迎来了一次飞跃发展,变化趋势表现为快速上升,少量下降,再稳步上升。北宋时期,湘江流域的人口年均增长率始终排在全国前列,这一时期湘江流域... 详细信息

湘江流域地区的人口在宋代发生了巨大的变迁。在经济发展与移民迁入的影响下,湘江流域人口数量迎来了一次飞跃发展,变化趋势表现为快速上升,少量下降,再稳步上升。北宋时期,湘江流域的人口年均增长率始终排在全国前列,这一时期湘江流域人口发展速度非常快,南宋时期,湘江流域人口年均增长率大幅下降,人口增速减缓。湘江流域的人口分布与地区经济发展水平密切相关,到南宋末年,潭州、衡州、岳州等地因经济发展较好,人口密度高于其它各州。湘江流域的人口分布是不平衡的,人口稠密区起初集中在湘江干流河谷地带,南宋时期又转向了湘江中下游地区。

关键词：宋代湘江流域人口变迁人口分布

Health Monitoring of Long-Haul Fiber Communication System Using Chaotic OTDR

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China Communications 2020年第5期17卷 1-11页

作者： Mengmeng chen Mingjiang Zhang Shaoxiang chen Jianguo Zhang Senlin Yan Yuncai Wang School of Electronic Engineering Nanjing Xiaozhuang UniversityNanjing 211171China Key Lab of Advanced Transducers and Intelligent Control Systems Ministry of Education and Shanxi ProvinceTaiyuan 030024China Institute of Optoelectronic Engineering College of Physics&OptoelectronicsTaiyuan University of TechnologyTaiyuan 030024China School of Electrical and Electronic Engineering The Photonics InstituteNanyang Technological University639798Singapore School of Information Engineering Guangdong University of TechnologyGuangzhou 510006China

A novel chaotic optical time-domain reflectometry(OTDR)-based approach was proposed for monitoring long-haul fiber communication systems with multiple fiber segments. The self-phase modulation and group velocity dispersion effects of the optical cable was considered in demonstrating the proof-of-concept experiment and simulation. In experiments, the correlation peaks are clearly obtained from the correlation trace between the reference and reflected(or scattered) light signals propagating in three optical-fiber segments. The technique affords a high spatial resolution of 2 m, and further long-haul fiber simulations indicate that the sensing distance can be more than 3300 km. Thus, the new proposed technique can be effectively applied for health monitoring of long-haul fiber communication systems.

关键词： fiber communication system chaotic signal optical time domain reflectometry

Ternary Ag/Ag3PO_(4)/MIL-125-NH2 Z-scheme heterojunction for boosted photocatalytic Cr(Ⅵ)cleanup under visible light

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Chinese Chemical Letters 2020年第10期31卷 2645-2650页

作者： Yun-Cai Zhou Peng Wang Huifen Fu chen Zhao Chong-chen Wang Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation Beijing University of Civil Engineering and ArchitectureBeijing 100044China

The binary Ag3 P04/MIL-125-NH2(AMN-X)composites were synthesized through ion exchange-solution method,and the ternary Ag/Ag3 PO_(4)/MIL-125-NH2(AAMN-X)Z-scheme heterojunctions were prepared via the photo chemical reduction deposition *** photocatalytic hexavalent chromium(Cr(VI))sequestration over AMN-X and AAMN-X were investigated under visible ***-120 accomplished superior reduction performance due to that Ag nanoparticles(NPs)act as electrons transfer bridge to enhance the separation efficiency of photogenerated e-h+pairs,in which the reaction rates(***)were 2.77 and 124.2 fold higher than those of individual MIL-125-NH2 and Ag3 PO_(4),*** influences of different pH values,small organic acids and coexisting ions on the photocatalytic perfo rmance of AAMN-120 were also *** addition,the AAMN-120 heterojunction expressed great reusability and stability in cycling *** mechanism of photocatalytic Cr(VI)was investigated and verified through photoluminescence(PL),electrochemistry,electron spin resonance(ESR),active species capture,and Pt element deposition experiments.

关键词： MIL-125-NH2 Ag/Ag3PO4 Hexavalent chromium Z-scheme heterojunction Photocatalysis

The Olfactory Receptor Pseudo-pseudogene: A Potential Therapeutic Target in Human Diseases

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Biomedical and Environmental Sciences 2018年第2期31卷 168-170页

作者： chen Zhe HUANG Zhen chen Lin Xi Institute of Pharmacy and Pharmacology University of South China

Recently, Prieto-Godino et al.[1] found that the olfactory receptor 75a （Ir75a） gene is a functional pseudo-pseudogene in Drosophila sechellia. For a long time, Ir75a has been regarded as an acetic acid receptor that detects acetic acid and induces obvious olfactory responses in olfactory sensory neurons （OSNs）f2J. Nonetheless, Prieto-Godino et al. confirmed that Ir75a lost its sensitivity to acetic acid in D. sechellia. Thus, the D. sechelfia Ir75a gene is generally recognized as a pseudogene in OSNs.

关键词： PTC A Potential Therapeutic Target in Human Diseases The Olfactory Receptor Pseudo-pseudogene

Concise synthesis of xanthones by the tandem etherification——Acylation of diaryliodonium salts with salicylates

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Chinese Chemical Letters 2018年第6期29卷 985-988页

作者： Gaoxiaozheng Liu Chao Wu Bifeng chen Ru He Chao chen MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology Department of Chemistry Tsinghua University The Graduate School at Shenzhen Tsinghua University

An efficient synthetic method for multi-substituted xanthones was developed. The reaction of diaryliodonium salts and salicylates was employed for the preparation of the xanthones. This method proceeded through an intermolecular etherification-acylation to give target heterocycles in good yields（up to 91%）. Multi-substituted xanthones were gained by shifting the substituent of salicylates or diaryliodonium salts

关键词： Xanthone Diaryliodonium salts Etherification Acylaion Multiple substituent

Comparison of TGF-β_1 in tears and corneal haze following Epi-LASIK with and without mitomycin C

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International Journal of Ophthalmology(English edition) 2013年第3期6卷 312-315页

作者： Jing chen Yi chen Su-Ning Han Department of Ophthalmology Guangzhou General Hospital of Guangzhou Military Command Training Center Guangzhou General Hospital of Guangzhou Military Command

AIM: To compare transforming growth factor-β1 (TGF- β1 ) levels in tears and the degree of corneal haze formation following epithelial laser in situ keratomileusis (Epi -LASIK) with and without the use of mitomycin C (MMC) and to investigate the effect of MMC on corneal wound healing. ·METHODS: Thirty-two patients (64 eyes) with high myopia underwent Epi -LASIK surgery, and MMC was randomly used in one eye in each patient. The epithelialization process was observed, and the TGF -β1 level in tears was measured at 1 day, 3, and 7 days postoperatively for comparison with baseline. Corneal haze was graded at 1 month, 3, and 6 months after surgery. · RESULTS: Mean preoperative spherical equivalent refraction was -8.24 ±2.18D (range-6.00 to -10.50D) in the MMC group and -7.82±1.55D (range -6.00 to -9.75D) in the non -MMC group. There was no significant difference between the two groups (P =0.38). Mean epithelialization time was (5.02 ±0.68) days in the MMC group and (4.86±0.57) days in the non-MMC group (P = 0.31). Tear fluid TGF-β1 levels were similar before surgery (P =0.34), but were significantly higher in the non-MMC group at 1 day, 3, and 7 days postoperatively (P =0.004, 0.008, and 0.012, respectively). Corneal haze scores 1 month after surgery were significantly higher in the non -MMC group (P =0.03), and similar at 3 and 6 months after surgery (P =0.28 and 0.62, respectively). ·CONCLUSION: MMC did not delay epithelialization. Inearly postoperative period, lower TGF -β1 levels in tears and a lower grade of corneal haze were observed in the MMC group. Our findings suggest that the ability of MMC to inhibit Epi -LASIK -induced haze might be mediated through TGF-β1 suppression.

关键词： Epi-LASIK MMC TGF-β1 haze

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张掖市地下水监测站网优化可行性分析

黑龙江环境通报 2025年第1期38卷 75-78页

作者：陈亮石海涛甘肃省张掖水文站甘肃张掖734000

地下水监测是地下水管理与保护的基础和前提,本文主要对水利部门在张掖市布设的地下水监测站网进行分析,针对张掖市地下水站网覆盖不全、布设密度不足、重点区域站网不尽完善、技术装备水平不高等问题和短板,认为已建的站网监测体系不... 详细信息

地下水监测是地下水管理与保护的基础和前提,本文主要对水利部门在张掖市布设的地下水监测站网进行分析,针对张掖市地下水站网覆盖不全、布设密度不足、重点区域站网不尽完善、技术装备水平不高等问题和短板,认为已建的站网监测体系不能满足当前地下水管理和保护需求,不能准确而全面地反映流域地下水动态变化规律。因此,在监测空白区、监测站网密度不足地区进行补充建设和改造提升是非常必要的。

关键词：地下水水位站网密度可行性