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Study of the temporal and spatial patterns of drought in the Yellow River basin based on SPEI

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Science China Earth Sciences 2018年第8期61卷 1098-1111页

作者： Fei WANG Zongmin WANG haibo yang Yong ZHAO Zhengzhou University School of Water Conservancy and Environment China Institute of Water Resources and Hydropower Research the State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin

Drought is one of the severe natural disasters to impact human society and occurs widely and frequently in China,causing considerable damage to the living environment of *** Yellow River basin(YRB)of China shows great vulnerability to drought in the major basins;thus,drought monitoring in the YRB is particularly *** on monthly data of 124 meteorological stations from 1961 to 2015,the Standardized Precipitation Evapotranspiration Index(SPEI)was used to explore the temporal and spatial patterns of drought in the *** periods and trends of drought were identified by Extreme-point Symmetric Mode Decomposition(ESMD),and the research stages were determined by Bernaola-Galvan Segmentation Algorithm(BGSA).The annual and seasonal variation,frequency and intensity of drought were studied in the *** results indicated that(1)for the past 55 years,the drought in the YRB has increased significantly with a tendency rate of-0.148(10 a)^(-1),in which the area Lanzhou to Hekou was the most vulnerable affected(-0.214(10 a)^(-1));(2)the drought periods(2.9,5,10.2 and 18.3 years)and stages(1961–1996,1997–2002 and 2003–2015)were characterized and detected by ESMD and BGSA;(3)the sequence of drought frequency was summer,spring,autumn and winter with mean values of 71.0%,47.2%,10.2%and 6.9%,respectively;and(4)the sequence of drought intensity was summer,spring,winter and autumn with mean values of 0.93,0.40,0.05 and 0.04,respectively.

关键词： Yellow River basin(YRB) Drought Standardized Precipitation Evapotranspiration Index(SPEI) Extreme-point Symmetric Mode Decomposition(ESMD) Bernaola-Galvan Segmentation Algorithm(BGSA)

Supramolecular flow chemistry: Construction of multiscale supramolecular assemblies by micro/nanofluidic techniques

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Chinese Chemical Letters 2024年第1期35卷 95-107页

作者： Leyong Zhou Changyin yang Weitao Dou Tongxia Jin haibo yang Lin Xu Shanghai Key Laboratory of Green Chemistry and Chemical Processes Shanghai Frontiers Science Center of Molecule Intelligent SynthesesSchool of Chemistry and Molecular EngineeringEast China Normal UniversityShanghai 200062China

The rapid and precise fabrication of multiscale supramolecular assemblies using micro/nanofluidic techniques has emerged as a dynamic area of research in supramolecular chemistry, materials chemistry, and organic chemistry. This review summarizes the application of micro/nanofluidic techniques in constructing supramolecular assemblies, including nanoscale supramolecular assemblies such as macrocycles and cages, microscale supramolecular assemblies such as metal organic frameworks (MOFs) and covalent organic frameworks (COFs), and macroscale supramolecular assemblies such as supramolecular hydrogels. Compared to conventional synthesis methods, micro/nanofluidic techniques for the production of supramolecular assemblies have significant advantages, including enhanced safety, high reaction rates, improved selectivity/yield, and scalability. Additionally, micro/nanofluidic systems facilitate the creation of precisely controllable micro/nanoconfined environments, allowing for a unique flow behavior that improves our understanding of the supramolecular self-assembly process. Such systems may also lead to the development of novel supramolecular assemblies that differ from those generated via traditional methods.

关键词： Supramolecular chemistry Self-assembly Micro nanofluidics technique Supramolecular flow chemistry Supramolecular assemblies

Fabrication of Neutral Supramolecular Polymeric Films via Post-electropolymerization of Discrete Metallacycles

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Chinese Journal of Chemistry 2018年第2期36卷 134-138页

作者： Guangqiang Yin Liiun Chen Cuihong Wang haibo yang Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular Engineering East China Normal University 3663 North Zhongshan Road Shanghai 200062 China

Self-assembly post-modification has proven to be an efficient strategy to build higher-order supramolecular architectures and functional materials. In this study, we successfully realized the construction＇of a new family of neutral supramolecular polymeric films containing well-defined metallacycles as the main scaffolds through combination Of coordination-driven self-assembly with post-electropolymerization. The obtained neutral polymeric materials were fully characterized by the cyclic voltammogram （CV）, SEM, and TEM. The thickness of the films was able to be well regulated by the number of scanning cycles. Moreover, we found that the shape of the metallacycles and the number of triphenylamine moieties played important roles in the formation of the final polymer films. We believe that the introduction of the neutral metallacycles into the final polymer structures not only enriches the library of supramolecular polymeric films but also provides a new platform to study neutral molecule detection, separation, and capture.

关键词： coordination-driven self-assembly post-electropolymerization neutral metallacycle triphenylamine supramolecular polymeric films

Rainfall during the night can trigger non-migratory take-off behavior of the white-backed planthopper, Sogatella furcifera

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Insect Science 2024年第6期31卷 1908-1917页

作者： haibo yang Yunlong Feng Pinhong Zhu Dingxu Li Gao Hu College of Horticulture and Plant Protection Henan University of Science and TechnologyLuoyangHenan ProvinceChina College of Plant Protection Nanjing Agricultural UniversityNanjingChina

Take-off behavior is crucial to the overall success of insect *** most high-altitude migratory flights commence with mass take-offs around dusk and dawn,little is known about nighttime take-off *** take-off behavior of migratory Sogatella furcifera was investigated in field cages from 2017 to *** species showed a bimodal take-off pattern at dusk and dawn on rainless nights,with mass flight at dusk more intense than dawn ***,a higher frequency of take-offs during the nighttime was observed on rainy nights,resulting in the absence of dawn *** migratory take-off individuals at dusk and dawn landed on the cage top or the walls above 150 cm,while non-migratory individuals that took off during the nighttime due to rainfall mainly landed on the cage walls below 150 ***,it has been observed that migratory take-off individuals possess stronger sustained flight capabilities and exhibit more immature ovaries compared with non-migratory *** findings advance our understanding of the take-off behavior of *** and thus provide a basis for the accurate prediction and management of the migratory dynamics of this pest.

关键词： flight capability non-migratory take-off ovarian development rainfall Sogatellafurcifera

Design and testing of micro fluidic chemical analysis chip integrated with micro valveless pump

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Science China(Technological Sciences) 2005年第3期48卷 326-337页

作者： FU Xin XIE haibo yang Huayong JIA Zhijian FANG Qun State Key Laboratory of Fluid Power Transmission and Control Zhejiang UniversityHangzhou 310027China State Key Laboratory of Fluid Power Transmission and ControlZhejiang UniversityHangzhou 310027China State Key Laboratory of Fluid Power Transmission and ControlZhejiang UniversityHangzhou 310027China Institute of Microanalytical SystemsZhejiang UniversityHangzhou 310028China Institute of Microanalytical SystemsZhejiang UniversityHangzhou 310028China

A new structure and working principle of the chip integrated with micro valveless pump for capillary electrophoresis was proposed in this paper. The micro valveless pump with plane structure has advantages of simple structure, and the process technology is compatible with existing micro chips for capillary electrophoresis. Based upon the mathematical model, simulation study of micro pump was carried out to investigate the influence of structural parameters on flow characteristics, and the performance of the integrated micro pump was also tested with different control parameters. The simulation results agree with the experimental results. Three samples, which are amino acid, fluorescein and buffer solution, have been examined with this chip. The results of the primary experiments showed that the micro valveless pump was promising in the integration and automatization of miniature integrated fluidic systems.

关键词： MEMS,micro valveless pump,micro fluidic chip,CFD,capillary electrophoresis.

Blind restoration of turbulence degraded images based on two-channel alternating minimization algorithm

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Optoelectronics Letters 2022年第2期18卷 122-128页

作者： yang Huizhen LI Songheng LI Xin ZHANG Zhiguang yang haibo LIU Jinlong Jiangsu Ocean University Lianyungang 222005China Jiangsu Marine Resources Development Research Institute Lianyungang 222005China Key Laboratory of Electro-Optical Information Control and Security Technology The 53th Research Institute of China Electronic Technology Group CorporationTianjin 300308China

Due to the atmospheric turbulence and the system noise, images are blurred in the astronomical or space object detection. Wavefront aberrations and system noise make the capability of detecting objects decrease greatly. A two-channel image restoration method based on alternating minimization is proposed to restore the turbulence degraded images. The images at different times are regarded as separate channels, then the object and the point spread function(PSF) are reconstructed in an alternative way. There are two optimization parameters in the algorithm: the object and the PSF. Each optimization step is transformed into a constraint problem by variable splitting and processed by the augmented Lagrangian method. The results of simulation and actual experiment verify that the two-channel image restoration method can always converge rapidly within five iterations, and values of normalized root mean square error(NRMSE) remain below 3% after five iterations. Standard deviation data show that optimized alternating minimization(OAM) has strong stability and adaptability to different turbulent levels and noise levels. Restored images are approximate to the ideal imaging by visual assessment, even though atmospheric turbulence and systemnoise have a strong impact on imaging. Additionally, the method can remove noise effectively during the process of image restoration.

关键词： turbulence minimization algorithm

Characteristics of the three-dimensional deep electrical structure in the Helan Mountains-Yinchuan Basin and its geodynamic implications

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Science China Earth Sciences 2023年第3期66卷 505-520页

作者： Lingqiang ZHAO Xiangyu SUN Yan ZHAN Jing HAN haibo yang Peijie WANG Xuehua LIU State Key Laboratory of Earthquake Dynamics Institute of GeologyChina Earthquake AdministrationBeijing 100029China Lhasa National Geophysical Observation and Research Station Lhasa 850004China The Second Monitoring and Application Center China Earthquake AdministrationXi’an 710043China

Located in the north segment of the North-South seismic belt where the Alxa block(AB)and the Ordos block(OB)contact,the Helan Mountains-Yinchuan Basin(HLM-YCB)constitutes a typical normal faulting basin-mountain structure on the Chinese *** 1739 M8.0 Pingluo earthquake occurred in the Yinchuan fault depression basin with such a basinmountain *** on five magnetotelluric profiles encompassing distinct segments of the HLM-YCB were utilized for three-dimensional(3D)joint inversion in order to collect fine 3D electrical structure information at a crustal and upper mantle scale across the entire *** electrical structure between the main blocks in the HLM-YCB and adjacent areas is characterized by east-west horizontal blocks OB,YCB,and HLM,which are divided by the Yellow River fault(F5)with the HLM eastern piedmont fault(F2)as electrical boundary zones on the east and west *** two main block units,AB and OB,exhibit an obvious layered resistivity ***,the HLM-YCB is characterized by a typical basin-mountain structure with the mountains as a high-resistivity body and the basin as a low-resistivity body,and in the northern YCB a large-scale lowresistivity structure exists,extending to the upper mantle,probably derived from the upwelling of mantle-derived *** is speculated from a combination of recent 3D crustal movement field information and other data that the HLM-YCB is an active tectonic zone formed via regional tensile *** formation of the HLM-YCB lies in the interaction of the Tibetan Plateau(TP),AB,and OB and abnormal mantle activities beneath the *** HLM-YCB reflects the joint action of upwelling and diffluence caused by the underplating of hot materials from the deep mantle with gravity and the redistribution of regional tectonic stress on the earth’s surface,which may be the main dynamic reason for the 1739 M8.0 Pingluo earthquake.

关键词： Helan Mountains Yinchuan Basin Magnetotelluric 3D electrical structure The 1739 Pingluo earthquake

A novel lead-free Na_(0.5)Bi_(0.5)TiO_(3)-based ceramic with superior comprehensive energy storage and discharge properties for dielectric capacitor applications

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Journal of Materiomics 2020年第4期6卷 743-750页

作者： Da Li Ying Lin Qibin Yuan Miao Zhang Liang Ma haibo yang Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials School of Materials Science and EngineeringShaanxi University of Science and TechnologyXi’an710021China School of Electronic Information&Artificial Intelligence Shaanxi University of Science and TechnologyXi’an710021China Xianyang Non-metallic Mineral R&D Institute Co. LtdXianyang712021China

Na_(0.5)Bi_(0.5)TiO_(3)(NBT)-based ceramics have been widely used as dielectric materials for energy storage capacitors because of their environmental friendliness and excellent ferroelectric ***,their energy storage performance still needs to be further improved to satisfy the increasing ***,we report a novel 0.90(Na_(0.5)Bi_(0.5))0.7Sr_(0.3)TiO_(3-0.10)Bi(Ni_(0.5)Sn_(0.5))O_(3)(0.90NBST-0.10BNS)ceramic with significantly improved energy density(5.0 J cm3),enhanced recoverable energy density(4.18 J cm^(3))and high energy efficiency(83.64%)through the incorporation of Bi(Ni0.5Sn0.5)O3(BNS),due to the increased breakdown strength and the relaxation ferroelectric(RFE)*** first-order reversal curve(FORC)measurements confirm that the addition of BNS improves RFE properties by breaking the order of long-range *** 0.90NBST-0.10BNS ceramic also possesses an outstanding temperature and frequency stability of energy storage properties in the range of 20C e140C and 1 Hze100 Hz,*** importantly,the discharge properties characterized by a preeminent power density(36.19 MW cm^(3)),transient energy release times(144.2 ns),and high discharge energy density(1.16 J cm3)also synchronously observed in 0.90NBST-0.10BNS *** results show that the 0.90NBST-0.10BNS ceramic with outstanding comprehensive performances is a promising energy storage ceramic candidate for capacitors in high power systems.

关键词： Na_(0.5)Bi_(0.5)TiO_(3) Ferroelectric properties Energy density Temperature stability Power density

Harnessing the native type I-B CRISPR-Cas for genome editing in a polyploid archaeon

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Journal of Genetics and Genomics 2017年第11期44卷 541-548页

作者： Feiyue Cheng Luyao Gong Dahe Zhao haibo yang Jian Zhou Ming Li Hua Xiang State Key Laboratory of Microbial Resources Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China

Research on CRISPR-Cas（clustered regularly interspaced short palindromic repeats-CRISPR associated protein） systems has led to the revolutionary CRISPR/Cas9 genome editing technique. However, for most archaea and half of bacteria, exploitation of their native CRISPR-Cas machineries may be more straightforward and convenient. In this study, we harnessed the native type I-B CRISPR-Cas system for precise genome editing in the polyploid haloarchaeon Haloarcula hispanica. After testing different designs, the editing tool was optimized to be a single plasmid that carries both the self-targeting miniCRISPR and a 600-800 bp donor. Significantly, chromosomal modifications, such as gene deletion, gene tagging or single nucleotide substitution, were precisely introduced into the vast majority of the transformants. Moreover, we showed that simultaneous editing of two genomic loci could also be readily achieved by one step. In summary, our data demonstrate that the haloarchaeal CRISPR-Cas system can be harnessed for genome editing in this polyploid archaeon, and highlight the convenience and efficiency of the native CRISPR-based genome editing strategy.

关键词： Haloarcula hispanica CRISPR-Cas Genome editing Polyploid