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Multiple generation effects of high temperature on the development and fecundity of Bemisia tabaci （Gennadius）（hemiptera Aleyrodidae） biotype B

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Insect Science 2013年第4期20卷 541-549页

作者： Jian-ying Guo Lin Cong Fang-hao Wan State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant Protection Chinese Academy of AgriculturalSciences Beijing China

Insects are ectotherms and their ability to resist temperature stress is limited. The immediate effects of sub-lethal heat stress on insects are well documented, but longer- term effects of such stresses are rarely reported. In this study, survival, development and reproduction of the whitefly, Bemisia tabaci （Gennadius）（hemiptera： Aleyrodidae） biotype B, were compared over five consecutive generations at 27, 31 and 35℃ and for one generation at 37 ℃. Both temperature and generation significantly affected the fitness of the whitefly. These impacts were more dramatic with increasing generations and temperatures. Among the experimental temperatures, the most favorable for development and reproduction were 27 ℃ and 31 ℃. At 27 ℃, survival, development and fecundity were all stable over these five generations. At 31 ℃, immature survival rate was the highest in the fifth generation, but female fecundities decreased in the fourth and fifth generations. At 35 ℃, egg hatching rate, immature survival rate and female fecundity decreased significantly in the fourth and fifth generations. At 37 ℃, survival ofB. tabaci was not adversely affected, but female fecundity at 37 ℃ was less than 10% of that at 27 ℃ or 31 ℃. These results demonstrate that the lethal high temperature for B. tabaci is over 37 ℃, and the whitefly population continued expanding in the five generations at 35 ℃. The ability orB. tabaci biotype B to survive high temperature stress will play an important role in its population extension under global warming.

关键词： Bemisia tabaci biotype B high temperature stress multiple generation ef-fects population expansion

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The solubility of cefquinome sulfate in pure and mixed solvents

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Frontiers of Chemical Science and Engineering 2016年第2期10卷 245-254页

作者： Rongbao Qi Jingkang Wang Junxiao Ye Hongxun hao ying Bao State Key Laboratory of Chemical Engineering School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China Collaborative Innovation Center of Chemical Science and Chemical Engineering (Tianjin) Tianjin 300072 China

Solid-liquid equilibrium data of cefquinome sulfate is important to develop industrial crystallization processes for cefquinome sulfate. The solubilities of cefquinome sulfate in five pure solvents （methanol, ethanol, ethylene glycol, acetic acid and water） from 277.15 to 305.15 K and in a binary acetone-water solvent from 278.15 to 293.15 K were measured at atmospheric pressure. The pure-solvent solubility data was correlated to the modified Apelblat and Van＇t Hoff equations whereas the mixed-solvent system data was correlated to the modified Apelblat, Van＇t Hoff, CNIBS/R-K and Jouy- ban-Acree models. It was found that the solubilities of cefquinome sulfate in all tested solvents decreased with the increasing of temperature. In addition, the thermodynamic properties of the dissolution processes, including standard Gibbs free energy, enthalpy and entropy changes, were calculated using the Van＇t Hoff equation. It was found that the dissolution of cefquinome sulfate is exothermic.

关键词： cefquinome sulfate solubility thermodynamic properties

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Effect of Alloying Method on Microstructure and Wear Resistance of Fe-Cr-V-B Based Alloy

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Journal of Iron and Steel Research International 2016年第6期23卷 625-632页

作者： Yu MA ying LIU Jun LI Hui ZHANG hao YANG School of Materials Science and Engineering Sichuan University

The microstructure and wear behavior of Fe-Cr-V-B based alloy was *** of the specimens was characterized by metallographic techniques and hardness *** analysis of alloy was performed by X-ray diffraction（XRD）,scanning electron microscopy（SEM）and energy dispersive spectroscopy（EDS）.The results showed that the microstructure of Fe-Cr-V-B based as-cast alloy containing 8.6mass% V was composed ofα-（Fe,Cr）solid solution,VC carbides,and V_3B_4 borides,whereas the as-cast alloy containing 24.8mass% Cr was composed ofα-（Fe,Cr）solid solution and V_3B_4borides;the eutectic V_3B_4 borides mainly comprise M2B-type borides（M presents Fe and Cr）.The existence of a large amount of V atoms affects the growth pattern of eutectic borides,which mainly display rod-like and grainy *** wear behavior of the experimental alloy has been investigated using pin-on-disk type friction and wear *** comparison of experimental results indicated that the relative wear resistance of the alloy containing 8.6mass% V after destabilization heat treatment in a conventional furnace at 1 373 K for 2hwas about six times higher than that of the high chromium（19mass%）cast iron.

关键词： eutectic chromium hardness dispersive vanadium annealed friction annealing coarsen precipitate

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Accurate Segmentation for Infrared Flying Bird Tracking

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Chinese Journal of Electronics 2016年第4期25卷 625-631页

作者： ZheNG Hong HUANG ying LING Haibin ZOU Qi YANG hao School of Automation Science and Electrical Engineering Beihang University Department of Computer and Information Science Temple University School of Computer and Information Technology Beijing Jiaotong University Airport Research Institute China Academy of Civil Aviation Science and Technology

Bird strikes present a huge risk for air vehicles,especially since traditional airport bird surveillance is mainly dependent on inefficient human *** improving the effectiveness and efficiency of bird monitoring,computer vision techniques have been proposed to detect birds,determine bird flying tra jectories,and predict aircraft takeoff *** bird with a huge deformation causes a great challenge to current tracking *** propose a segmentation based approach to enable tracking can adapt to the varying shape of *** approach works by segmenting object at a region of interest,where is determined by the object localization method and heuristic edge *** segmentation is performed by Markov random field,which is trained by foreground and background mixture Gaussian *** demonstrate that the proposed approach provides the ability to handle large deformations and outperforms the most state-of-the-art tracker in the infrared flying bird tracking problem.

关键词： Object tracking Edge detection Segmentation Gaussian mixture model Markov random field(MRF)

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BiOCl nanostructures with different morphologies:Tunable synthesis and visible-light-driven photocatalytic properties

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Chinese Chemical Letters 2015年第1期26卷 133-136页

作者： Hong-ying hao Yan-Yan Xu Ping Liu Guo-ying Zhang Tianjin Key Laboratory of Structure and Performance for Functional Molecule Laboratory of Inorganic-Organic Hybrid Functional Material ChemistryMinistry of EducationSchool of ChemistryTianjin Normal University

BiOCl nanostructures including microspheres,microflowers,microplates,and nanoplates,have been synthesized by a simple solvothermal method using bismuth nitrate and sodium chloride as raw materials without adding any *** and morphology of the products were characterized by powder X-ray diffraction,scanning electron microscopy,and transmission electron *** results indicated that the as-prepared microspheres and microflowers were composed of *** with different shape and lateral size,the nanoplates and microplales were all single-crystalline plates with exposed {001） *** was found that the volume ratio of polyethylene glycol 400 and H_2O in the solvent played a key role in the morphology of the products,and the possible growth mechanism was also *** photocatalytic measurements indicated that the BiOCl samples exhibit good photocatalytic properties towards Rhodamine B.

关键词： BiOCl nanostructure Crystal growth Semiconductors Photocatalytic property

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Third-order topological insulators with wallpaper fermions in Tl_(4)PbTe_(3)and Tl_(4)SnTe_(3)

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npj Computational Materials 2022年第1期8卷 1461-1467页

作者： Ning Mao hao Wang ying Dai Baibiao Huang Chengwang Niu School of Physics State Key Laboratory of Crystal MaterialsShandong UniversityJinanChina

Nonsymmorphic symmetries open up horizons of exotic topological boundary states and even generalize the bulk–boundary correspondence,which,however,the third-order topological insulator in electronic materials are still ***,by means of the symmetry analysis and k·p models,we uncover the emergence of long-awaited third-order topological insulators and the wallpaper fermions in space group I4/mcm(No.140).Based on this,we present the hourglass fermion,fourfold-degenerate Dirac fermion,and Möbius fermion in the(001)surface of Tl_(4)XTe_(3)(X=Pb/Sn)with a nonsymmorphic wallpaper group ***,16 helical corner states reside on eight corners in Kramers pair,rendering the real electronic material of third-order topological *** importantly,a time-reversal polarized octupole polarization is defined to uncover the nontrivial third-order topology,as is implemented by the 2nd and 3rd order Wilson loop *** results could considerably broaden the range of wallpaper fermions and lay the foundation for future experimental investigations of third-order topological insulators.

关键词： topological insulator boundary

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Isolation and Characterization of Two Novel Gene Encoded Alkaline Esterases from an Alkaline Soil Metagenomic Library

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Chemical Research in Chinese Universities 2010年第4期26卷 583-590页

作者： LU Yang LIU Xiang-guo YU ying QU he-zhi YANG Shuo NING BO WANG Xiao-ping hao Dong-yun Key Laboratory for Molecular Enzymology and Engineering Ministry of Education Jilin University Changchun 130021 P. R. China College of Life Science Jilin University Changchun 130012 P. R. China Biotechnology Research Centre Jilin Academy of Agricultural Sciences Changchun 130033 P. R. China

The development of industrial biotechnology has created an increasing demand for alkaline lipolytic enzymes with functional diversity. In this study, an alkaline soil metagenomic library was constructed to search for new lipolytic enzymes. Two novel gene encoded alkaline esterases（designated as estA and estB） were isolated by functional screening from the library. The estA gene consisted of 834 bp and coded for 277 amino acids with a molecular mass of 29998. Amino acid sequence homology analysis indicates that EstA belongs to α/β hydrolase fold family 4.4（abH4.4）, with EstA being the smallest member of that family yet reported. The estB gene consisted of 1185 bp and encoded 394 amino acids with a theoretical molecular mass of 40090. Its conserved domain analysis shows that EstB belongs to the GDSL hydrolase superfamily. Both EstA and EstB exhibit only moderate identity（〈38%） in amino acid sequence to the known lipolytic enzyme genes in the database. The two genes were respectively expressed in Escherichia coli and the protein products were purified for functional characterization. While the expressed EstA did not exhibit the functional properties that were superior to those of other esterases previously reported, the EstB was stable at temperature up to 45 ℃ and its maximum activity was measured to be 53.6 U/mg at pH=10. Both the en- zymes have further enriched the diversity of the lipolytic enzymes database and also appear to be promising biocatalysts for potential biotechnological application.

关键词： Alkaline esterase Enzymatic characterization Metagenome

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Index for climate change adaptation in China and its application

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Advances in Climate Change Research 2021年第5期12卷 723-733页

作者： FU Lin CAO ying KUANG Shu-Ya GUO hao National Center for Climate Change Strategy and International Cooperation Beijing100035China Institute of Climate Change and Sustainable Development Tsinghua UniversityBeijing100084China

With the increasing awareness of the risks and impacts of climate change, scholars tend to pay more attention to the applications of indicators, which access the effectiveness of climate change adaptation. This study aims to evaluate the overall progress of climate change adaptation in China during 2010–2018 in a quantitative manner. The Index for Climate Change Adaptation in China (ICCAC) has been thus developed by adopting the analytic hierarchy process weighting and expert scoring method. Namely, ICCAC is composed of national climate change impacts, adaptation actions in key sectors, adaptation progress in key sectors, and the national adaptation policy framework. Overall, the ICCAC and its four sub-indexes increased significantly from 2010 to 2018, on a yearly-basis. Each sub-index implied that the socio-economic impacts caused by climate change in China have been alleviated gradually;specifically, the mainstream endeavor of key sectors has witnessed remarkable progress, however, it is worth noting that the gap between individual adaptation actions and policies still exists;the implementation effect of policies in key sectors is not as affluent as that of actions;the current adaptation endeavor in key areas is still closely related to the mainstream business of corresponding competent ministries rather than adaptation-aimed actions;the national adaptation policy framework has been primarily formed, but there are still some deficiencies. As a result, the gap in China's adaptation process could be mainly manifested in the following five aspects: i) adaptation effectiveness assessment in forestry and urban infrastructure is urgently needed;ii) policies in marine and water resources sectors need structural reforms;iii) evaluation criteria for national adaptation are not necessarily sufficient;iv) the improvement of adaptive management efficiency has stagnated recently;and v) the adaptation works of relevant Ministries should be coordinated and put forward the corres

关键词： Climate change Adaptation Index Evaluation Risk assessment Policy recommendation

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Silicon-based on-chip hybrid(de)multiplexers

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Science China(Information Sciences) 2018年第8期61卷 90-103页

作者： Chenlei LI hao WU ying TAN Shipeng WANG Daoxin DAI Centre for Optical and Electromagnetic Research State Key Laboratory for Modern Optical InstrumentationCollege of Optical Science and Engineering Zhejiang University

A review is given on the recent progress of silicon-based on-chip hybrid multiplexers, which are the key elements to enable more than one(de)multiplexing techniques simultaneously, including wavelengthdivision-multiplexing(WDM), polarization-division-multiplexing(PDM), and mode-division-multiplexing(MDM). This helps enhance the link capacity of optical interconnects multiplexed with many *** first part gives a review on the recent developed silicon-based hybrid WDM-PDM(de)multiplexers enabling WDM and PDM simultaneously, which helps achieve 2 N channels by introducing N wavelengths and dual polarizations. The recent progress of silicon-based hybrid WDM-MDM(de)multiplexers developed is reviewed in the second part. With the hybrid WDM-MDM(de)multiplexers, one can achieve N × M channels by using N wavelengths and M guided-modes. Finally, the silicon-based hybrid MDM-PDM(de)multiplexers are presented as the key to enhance the link capacity for a single wavelength carrier.

关键词： silicon photonics (de)multiplexing wavelength mode polarization waveguide

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Review of cavity optomechanics in the weak-coupling regime: from linearization to intrinsic nonlinear interactions

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Science China(Physics,Mechanics & Astronomy) 2015年第5期58卷 16-28页

作者： XIONG hao SI LiuGang LV XinYou YANG XiaoXue WU ying Wuhan National Laboratory for Optoelectronics and School of Physics Huazhong University of Science and Technology

Recently, cavity optomechanics has become a rapidly developing research field exploring the coupling between the optical field and mechanical oscillation. Cavity optomechanical systems were predicted to exhibit rich and nontrivial effects due to the nonlinear optomechanical interaction. However, most progress during the past years have focused on the linearization of the optomechanical interaction, which ignored the intrinsic nonlinear nature of the optomechanical coupling. Exploring nonlinear optomechanical interaction is of growing interest in both classical and quantum mechanisms, and nonlinear optomechanical interaction has emerged as an important new frontier in cavity optomechanics. It enables many applications ranging from single-photon sources to generation of nonclassical states. here, we give a brief review of these developments and discuss some of the current challenges in this field.

关键词： cavity optomechanics nonlinear interactions weak-coupling regime radiation pressure

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