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四川光雾山国家风景名胜区蝶类调查

四川动物 2024年第1期43卷 102-108页

作者：胡雯倩唐靖萱张宸睿毛康珊王东磊陈思杨窦亮四川大学生命科学学院生物资源与生态环境教育部重点实验室成都610065 四川大学生命科学学院四川省濒危野生动物保护生物学重点实验室成都610065 环太蝶类工作室成都610000

为了解四川省巴中市光雾山风景名胜区蝴蝶资源状况,于2021年5—10月对景区及其周边区域的蝶类物种多样性进行调查,共发现蝶类5科80属117种。物种数上,蛱蝶科Nymphalidae最多(55种,占47.01%),其次是弄蝶科Hesperiidae(20种)、灰蝶科Lycae... 详细信息

为了解四川省巴中市光雾山风景名胜区蝴蝶资源状况,于2021年5—10月对景区及其周边区域的蝶类物种多样性进行调查,共发现蝶类5科80属117种。物种数上,蛱蝶科Nymphalidae最多(55种,占47.01%),其次是弄蝶科Hesperiidae(20种)、灰蝶科Lycaenidae(16种)、粉蝶科Pieridae(15种)和凤蝶科Papilionidae(11种)。调查到的117种蝶类中,东洋种44种,古北种10种,广布种48种,另有15种未查明区系组成。本研究显示光雾山地区蝶类多样性在国内同类型自然保护区或风景名胜区中处于较高水平,表明当地生物多样性状况良好,尚未受到大规模人为干扰破坏。

关键词：蝶类多样性光雾山国家风景名胜区名录区系

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黏性土-混凝土界面抗剪及残余强度试验研究

低温建筑技术 2024年第6期46卷 44-47页

作者：张硕王永洪武洪志王春光刘龙海孙连杰王东雷青岛理工大学土木工程学院山东青岛266033 山东高速工程建设集团有限公司济南250014 烟台市公路事业发展中心山东烟台264001 青岛永元海洋科技有限公司山东青岛266033 青岛绿色理工岩土工程有限公司山东青岛266033

文中采用自制的大型试验系统,通过直剪试验对粉质黏土-混凝土界面在不同粗糙度条件下的剪切特性展开研究,探明预制桩桩-土界面的力学参数与粗糙度之间的关系。结果表明粗糙度是预制桩桩-土界面的剪切强度和剪切刚度等力学性质的重要影... 详细信息

文中采用自制的大型试验系统,通过直剪试验对粉质黏土-混凝土界面在不同粗糙度条件下的剪切特性展开研究,探明预制桩桩-土界面的力学参数与粗糙度之间的关系。结果表明粗糙度是预制桩桩-土界面的剪切强度和剪切刚度等力学性质的重要影响因素。界面抗剪强度、界面摩擦角、界面附着力、界面剪切刚度和界面剪切破坏位移等力学参数均随着混凝土表面粗糙度的增大而增大,其中剪切破坏位移增幅较为显著,最大增幅达55%;界面附着力随粗糙度增大呈先减小后增大的趋势,最大增幅23.7%。试验结果对静压桩的工程实践具有重要意义。

关键词：桩-土界面粗糙度粉质黏土界面剪切特性

Maximizing Submodular+Supermodular Functions Subject to a Fairness Constraint

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Tsinghua Science and Technology 2024年第1期29卷 46-55页

作者： Zhenning Zhang Kaiqiao Meng donglei Du Yang Zhou Beijing Institute for Scientific and Engineering Computing Beijing University of TechnologyBeijing 100124China Faculty of Management University of New BrunswickFredericton E3B 5A3Canada School of Mathematics and Statistics Shandong Normal UniversityJinan 250014China

We investigate the problem of maximizing the sum of submodular and supermodular functions under a fairness *** sum function is non-submodular in *** an offline model,we introduce two approximation algorithms:A greedy algorithm and a threshold greedy *** a streaming model,we propose a one-pass streaming *** also analyze the approximation ratios of these algorithms,which all depend on the total curvature of the supermodular *** total curvature is computable in polynomial time and widely utilized in the literature.

关键词： submodular function supermodular function fairness constraint greedy algorithm threshold greedy algorithm streaming algorithm

MoO_(x) nanoclusters on Mo-doped TiO_(2) nanosheets with enhanced singlet oxygen generation and sulfide conversion abilities for photocatalytic aerobic oxidative desulfurization

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Science China Chemistry 2024年第1期67卷 408-414页

作者： Suting Xie Xinyu Zhao Dongxiao wang Huawei Yang Lixia Yang Liangjiu Bai donglei Wei Wenxiang wang Ying Liang Hou Chen Shaojun Guo College of Chemistry and Materials Science Ludong UniversityYantai 264025China College of Materials Science and Engineering Peking UniversityBeijing 100871China

Photocatalytic aerobic oxidation desulfurization(PAODS)is a promising and sustainable alternative to conventional,energyintensive desulfurization techniques for petroleum ***,its development is greatly plagued by the low capability in generating highly reactive oxygen species and sluggish kinetics of sulfide oxidation of reported *** we report a class of MoO_(x)nanocluster decorated on ultrathin Mo-doped TiO_(2)nanosheet(MoO_(x)/MoTiO)catalyst for efficiently facilitating the photocatalytic aerobic oxidation of *** demonstrate that MoO_(x)/MoTiO can not only promote the generation of highly reactive singlet oxygen(^(1)O_(2))but also enhance the aerobic conversion of sulfides,which leads to a record dibenzothiophene oxidation activity of 3.90 mmol g^(-1)h^(-1).The multiple experimental characterizations and density functional theory calculations collectively reveal that the doped-Mo sites can interact with the photogenerated excitons,enabling directly energy transfer generation of^(1)O_(2)through a new exciton modulation mechanism,and the coordination unsaturated MoO_(x)clusters play the role of co-catalyst to enhance the separation of charge carriers,and effectively catalyze the reaction between sulfides and1O_(2)to form sulfones.

关键词： titanium dioxide photocatalytic aerobic oxidation desulfurization dibenzothiophene singlet oxygen

Use of Electrical Resistance to Detect the Formation and Decomposition of Methane Hydrate

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Journal of Natural Gas Chemistry 2007年第4期16卷 399-403页

作者： Xitang Zhou Shuanshi Fan Deqing Liang donglei wang Ningsheng Huang Guangzhou Center for Gas Hydrate Research Guangzhou Institute of Energy Conversion Chinese Academy of Sciences Guangzhou 510650 Guangdong China The Key Laboratory of Enhanced Heat Transfer and Energy Conservation Ministry of Education South China University of Technology Guangzhou 510650 Guangdong China Graduate University of Chinese Academy of Sciences Beijing 100059 China School of Chemical Engineering Maoming University Maoming 525000 Guangdong China

The changes of electrical resistance （R） were studied experimentally in the process of CH4 hydrate formation and decomposition, using temperature and pressure as the auxiliary detecting methods simultaneously. The experiment results show that R increases with hydrate formation and decreases with hydrate decompositon. R is more sensitive to hydrate formation and decompositon than temperature or pressure, which indicates that the detection of R will be an effective means for detecting natural gas hydrate （NGH） quantitatively.

关键词： methane hydrate formation decomposition electrical resistance detection

Analysis of genetic diversity and population structure of Chinese yak breeds (Bos grunniens) using microsatellite markers

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Journal of Genetics and Genomics 2008年第4期35卷 233-238页

作者： Guixiang Zhang Weisheng Chen Ming Xue Zhigang wang Hong Chang Xu Han Xinjun Liao donglei wang National Center of Preservation and Utilization of Genetic Resources of Domestic Animals and Forage National Animal Husbandry and Veterinary Service Beijing 100094 China NationalAnimal Husbandry Service Beijing 100026 China College of Animal Science and Technology Yangzhou University Yangzhou 225009 China

Nine Chinese yak breeds （Maiwa, Tianzhu White, Qinghai Plateau, Sibu, Zhongdian, Pali, Tibetan High Mountain, Jiulong, and Xinjiang） and Gayal were analyzed by means of 16 microsatellite markers to determine the level of genetic variation within populations, genetic relationship between populations, and population structure for each breed. A total of 206 microsatellite alleles were observed. Mean F-statistics （0.056） for 9 yak breeds indicated that 94.4% of the genetic variation was observed within yak breeds and 5.6% of the genetic variation existed amongst breeds. The Neighbor-Joining phylogenetic tree was constructed based on Nei＇s standard genetic distances and two clusters were obtained. The Gayal separated from the yaks far away and formed one cluster and 9 yak breeds were grouped together. The analysis of population structure for 9 yak breeds and the Gayal showed that they resulted in four clusters; one cluster includes yaks from Tibet Autonomous Region and Qinghai Province, one cluster combines Zhongdian, Maiwa, and Tianzhu White, and Jiulong and Xinjiang come into the third cluster. Pali was mainly in the first cluster （90%）, Jiulong was mainly in the second cluster （87.1%）, Zhongdian was primarily in the third cluster （83%）, and the other yak breeds were distributed in two to three clusters. The Gayal was positively left in the fourth cluster （99.3%）.

关键词： Chinese yak breeds microsatellite genetic diversity population structure

Pipeline Embolization Device for intracranial aneurysms presenting with mass effect:a large Chinese cohort

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Stroke & Vascular Neurology 2024年第1期9卷 50-58页

作者： Yang Zhao Junlin Lu Hongqi Zhang Tianxiao LI donglei Song Sheng Guan Aisha Maimaitili Yunyan wang Wenfeng Feng Yang wang Jieqing Wan Guohua Mao Huaizhang Shi Xinjian Yang Jianmin Liu Yuanli Zhao Department of Neurosurgery Beijing Tiantan HospitalCapital Medical UniversityBeijingChina Department of Neurosurgery Peking University International HospitalBeijingChina Department of Neurosurgery West China HospitalSichuan UniversityChengduSichuanChina Department of Neurosurgery Xuanwu HospitalCapital Medical UniversityBeijingChina Department of Interventional Neuroradiology Zhengzhou University People's HospitalZhengzhouHenanChina Department of Neurosurgery Shanghai Donglei Brain HospitalShanghaiChina Department of Interventional Neuroradiology The First Affiliated Hospital of Zhengzhou UniversityZhengzhouHenanChina Department of Neurosurgery The First Affiliated Hospital of Xinjiang Medical UniversityUrumqiXinjiangChina Department of Neurosurgery Qilu Hospital of Shandong University QingdaoJinanShandongChina Department of Neurosurgery Nanfang HospitalSouthern Medical UniversityGuangzhouGuangdongChina Department of Neurosurgery The First Affiliated Hospital of Nanchang UniversityNanchangJiangxiChina Department of Neurosurgery Renji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghaiChina Department of Neurosurgery The Second Affiliated Hospital of Nanchang UniversityNanchangJiangxiChina Department of Neurosurgery The First Affiliated Hospital of Harbin Medical UniversityHarbinHeilongjiangChina Department of Neurosurgery Changhai HospitalNaval Medical UniversityShanghaiChina

Background Unruptured intracranial aneurysm treatment aims to reduce the risk of aneurysm rupture and bleeding,relieves symptoms and improve the quality of life for *** study aimed to assess the safety and efficacy of Pipeline Embolization Device(PED,Covidien/Medtronic,Irvine,CA)treatment for intracranial aneurysms presenting with mass effect in real-world *** We selected patients from the PED in China Post-Market Multi-Center Registry Study with mass effect *** study endpoints included postoperative mass effect deterioration and mass effect relief at follow-up(3–36 months).We conducted multivariate analysis to identify factors associated with mass effect *** analyses by aneurysm location,size and form were also *** This study included 218 patients with a mean age of 54.3±11.8 years and a female predominance of 74.0%(162/218).The postoperative mass effect deterioration rate was 9.6%(21/218).During a median follow-up period of 8.4 months,the mass effect relief rate was 71.6%(156/218).Notably,immediate aneurysm occlusion following treatment was significantly associated with mass effect relief(OR 0.392,95%CI,0.170 to 0.907,p=0.029).Subgroup analysis demonstrated that adjunctive coiling contributed to mass effect relief in cavernous aneurysms,while dense embolism impeded symptom relief in aneurysms<10mm and saccular *** Our data confirmed the efficacy of PED in relieving mass *** findings of this study provide support for endovascular treatment to alleviate mass effect in unruptured intracranial *** registration number NCT03831672.

关键词： aneurysm intracranial Irvine

Investigation on layover imaging in synthetic aperture ladar

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Frontiers of Optoelectronics 2013年第3期6卷 251-260页

作者： Zhaosheng YANG Jin WU Zhilong ZHAO donglei wang Yuanyuan SU Na LIANG University of Chinese Academy of Sciences Beijing I00039 China Institute of Electronics Chinese Academy of Sciences Beijing 100190 China

Due to the short laser wavelength, almost all practical targets are rough. Surface elevations in rough targets will result in layovers in synthetic aperture ladar （SAL）. High resolution SAL image with layovers will be different fi＇om the target picture taken by incoherent tools as digital camera. To investigate the layovers in SAL image, a simplified mathematical model is built by optics diffraction theory and a laboratory SAL is setup using 1550 mn tunable laser source. Layovers in SAL images, in both theoretical simulation and experimental demonstra- tion, are carefully observed. Detailed results on various targets are illustrated.

关键词： synthetic aperture ladar (SAL) rough target,layover simulation demonstration

Multicolor emission from lanthanide ions doped lead-free Cs_(3)Sb_(2)Cl_(9) perovskite nanocrystals

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Journal of Rare Earths 2024年第5期42卷 940-946,I0005页

作者： He Shao Lifang Li Xiufeng Wu Lin Xu Biao Dong donglei Zhou Xue Bai Hongwei Song State Key Laboratory of Organic Electronics and Information Displays&Institute of Advanced Materials College of Materials Science and EngineeringNanjing University of Posts&TelecommunicationsNanjing210023China State Key Laboratory of Integrated Optoelectronics College of Electronic Science and Engineering Jilin UniversityChangchun130012China

The toxicity of lead ions has become the severe challenge for the all-inorganic lead halide p erovskite materials,although some works have rep orted the lead-free perovskite nanocrystals(NCs),the photoluminescence quantum yield(PLQY)of these materials is still ***,because the halogen ions can be easily exchanged,the controllable multicolor emission in perovskite NCs is difficult to realize in current *** this work,we introduced lanthanide ions into lead-free Cs_(3)Sb_(2)Cl_(9) perovskite *** from the energy transfer between Cs_(3)Sb_(2)Cl_(9) perovskite NC host and lanthanide ions,the multicolor emission was *** on controlling the doping concentration of Tb^(3+)and Eu^(3+)ions,the white light emission under UV excitation would be turned easily in the Tb^(3+)/Eu^(3+)codoped *** addition,efficient energy transfer from perovskite NCs to Tb^(3+)or Eu^(3+)ions is beneficial to improving the optical properties of lead-free perovskite NCs,resulting in maximum PLQYs of red,green and white light emission of 22.6%,19.7%and 28.5%,***,a white light emitting device(WLED)was fabricated with a power efficiency of 18.5 lm/W,which presents the Commission Internationale de l'Eclairage(CIE)of(0.33,0.35).

关键词： Perovskite nanocrystals Lead free Lanthanide ions Energy transfer White light emitting device Rare earths