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Growth and feeding habits of invasive Pseudorasbora parva in the Chabalang Wetland(Lhasa,China) and its trophic impacts on native fish

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Journal of Oceanology and Limnology 2019年第2期37卷 628-639页

作者： DING Huiping GU Xiaohong ZHANG Zhiming HUO Bin LI Dapeng xie Congxin State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography & Limnology Chinese Academy of Sciences Nanjing 210008 China University of Chinese Academy of Sciences Beijing 100049 China College of Fisheries Huazhong Agricultural University Wuhan 430070 China Institute of Hydroecology MWR & CAS Wuhan 430070 China Key Laboratory of Ecological Impacts of Hydraulic-Projects and Restoration of Aquatic Ecosystem Ministry of Water Resources Wuhan 430070 China

In recent years, fish invasion has become one of the main reasons for the decline of native fish stocks. Pseudorasbora parva is considered one of the major invasive species worldwide. The present study investigated the fish resources of the Chabalang Wetland (Lhasa, Tibet) during diff erent seasons in 2009 and 2013. Four hundred and twelve individuals were subsampled to estimate age, growth, and feeding habit of P . parva . Furthermore, food relationships between P . parva and the native Schizothoracinae fish were also examined. The results revealed a significant shift in species composition and community structure characterized by the disappearance of native fish and outbreak of non-native fish. The percentage of nonnative P . parva in the fish collections significantly increased from 33.64% in 2009 to 64.08% in 2013. The standard length (SL) ranged from 22.00 to 78.71 mm, and their age was 1–5 a. The von Bertalanff y function was used to model the observed length-at-age data as L t =112.19(1–e^-0.1495 ( t +0.8012)) for females and as L t =123.12 (1–e^-0.1500 ( t +0.7132)) for males. The results indicated that P . parva in Tibet has lower growth and mortality rates compared with that from the native ranges. Ninety-seven prey taxa belonging to 9 prey categories were identified in the gut of 38 P . parva . P . parva can be considered a generalized and opportunistic predator, competing with the native fish, especially Schizothorax o’connori , Schizopygopsis younghusbandi younghusbandi , and Ptychobarbus dipogon , for Bacillariophyta and Chironomid larvae. This is an important reason for the decline in native fish population.

关键词： Pseudorasbora parva growth feeding habits Schizothoracinae fish biological invasion

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Genomic and transcriptomic analyses reveal selection of genes for puberty in Bama Xiang pigs

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Zoological Research 2018年第6期39卷 424-430页

作者： Yang Yang Adeniyi C.Adeola Hai-Bing xie Ya-Ping Zhang State Key Laboratory of Genetic Resources and Evolution Yunnan Laboratory of Molecular Biology of Domestic AnimalsKunming Institute of ZoologyChinese Academy of Sciences Kunming College of Life Science University of Chinese Academy of Sciences

The Bama Xiang pig （BMX） Chinese indigenous breed is a famous early-maturing with a two-end black coat To uncover the genetic basis of the BMX phenotype, we conducted comparative genomic analyses between BMX and East Asian wild boars and Laiwu pigs, respectively. Genes under positive selection were enriched in pathways associated with gonadal hormone and melanin synthesis, consistent with the phenotypic changes observed during development in BMX pigs. We also performed differentially expressed gene analysis based on RNA-seq data from pituitary tissues of BMX and Large White pigs. The CTTNBP2NL, FRS2, KANK4, and KATNAL1 genes were under selection and exhibited expressional changes in the pituitary tissue, which may affect BMX pig puberty. Our study demonstrated the positive selection of early maturity in the development of BMX pigs and advances our knowledge on the role of regulatory elements in puberty evolution in pigs.

关键词： Puberty Bama Xiang pig Pituitary Differentially expressed genes

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DPT‐tracker:Dual pooling transformer for efficient visual tracking

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CAAI Transactions on Intelligence Technology 2024年第4期9卷 948-959页

作者： Yang Fang Bailian xie Uswah Khairuddin Zijian Min Bingbing Jiang Weisheng Li Key Laboratory of Data Engineering and Visual Computing Chongqing University of Posts and TelecommunicationsChongqingChina Department of Mechanical Precision Engineering Malaysia‐Japan International Institute of TechnologyUniversity of Technology MalaysiaKuala LumpurMalaysia Department of Electrical and Computer Engineering Inha UniversityIncheonRepublic of Korea School of Information Science and Technology Hangzhou Normal UniversityHangzhouChina

Transformer tracking always takes paired template and search images as encoder input and conduct feature extraction and target‐search feature correlation by self and/or cross attention operations,thus the model complexity will grow quadratically with the number of input *** alleviate the burden of this tracking paradigm and facilitate practical deployment of Transformer‐based trackers,we propose a dual pooling transformer tracking framework,dubbed as DPT,which consists of three components:a simple yet efficient spatiotemporal attention model(SAM),a mutual correlation pooling Trans-former(MCPT)and a multiscale aggregation pooling Transformer(MAPT).SAM is designed to gracefully aggregates temporal dynamics and spatial appearance information of multi‐frame templates along space‐time *** aims to capture multi‐scale pooled and correlated contextual features,which is followed by MAPT that aggregates multi‐scale features into a unified feature representation for tracking *** tracker achieves AUC score of 69.5 on LaSOT and precision score of 82.8 on Track-ingNet while maintaining a shorter sequence length of attention tokens,fewer parameters and FLOPs compared to existing state‐of‐the‐art(SOTA)Transformer tracking *** experiments demonstrate that DPT tracker yields a strong real‐time tracking baseline with a good trade‐off between tracking performance and inference efficiency.

关键词： human‐computer interfacing image motion analysis pattern recognition signal processing tracking

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A New Type of Evolutionary Strategy Based on a Multi-player Iterated Prisoner’s Dilemma Game

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Journal of Systems Science and Information 2020年第1期11卷 67-81页

作者： Nenggang xie Ye YE Wei BAO Meng WANG School of Management Science and Engineering Anhui University of TechnologyMa’anshan 243002China School of Mechanical Engineering Anhui University of TechnologyMa’anshan 243002China School of Business Anhui University of TechnologyMa’anshan 243002China

According to the philosophy of self-cultivation that"one should refine his personal virtue when in poverty,and help save the world when in success",a new type of evolutionary strategy,PoorCompetition-Rich-Cooperation(PCRC),is *** discuss its superiority and inferiority,based on a multi-player iterated Prisoner’s Dilemma game,PCRC and other six kinds of strategies are played by using the roulette method in three different populations(a uniformly distributed population,a cooperation-preference population,a defection-preference population).The payoff characteristics for each strategy under different temptation coefficients and noise values are also *** results indicate that PCRC has a sufficient robustness and its payoff presents a basically monotonic increasing tendency with the increment of *** superiority of PCRC becomes more obvious when the temptation coefficient becomes ***,a higher population preference for defection yields a more obvious advantage for PCRC.

关键词： game Prisoner’s Dilemma PCRC robustness

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Conjecture on the Time Scales of Intramolecular Dynamics and Lyapunov Relaxation

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Chinese Physics Letters 1997年第5期14卷 336-339页

作者： xie Xi-shun HUANG Xiao-qin ZHAO Mei-shan Department of Physics Southeast UniversityNanjing 210096 Department of Physics Nanjing Normal UniversityNanjing 210097 The James fianck Institute The University of ChicagoChicagoIllinois 60637U.S.A.

A dynamical study of intramolecular energy transfer in a realistic polyatomic model molecular system is *** the present study and dynamical information established in the previous research we make the conjecture that ... 详细信息

关键词： dynamical relaxation Lyapunov

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Mesoporous molecular sieve-based materials for catalytic oxidation of VOC: A review

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Journal of Environmental Sciences 2023年第3期125卷 112-134页

作者： Wei Gao Xiaolong Tang Honghong Yi Shanxue Jiang Qingjun Yu Xizhou xie Ruijie Zhuang Department of Environmental Science and Engineering School of Energy and Environmental EngineeringUniversity of Science and Technology BeijingBeijing 100083China State Environmental Protection Key Laboratory of Food Chain Pollution Control Beijing Technology and Business UniversityBeijing 100048China Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants Beijing 100083China

As the main contributor of the formation of particulate matter as well as ozone, volatile organic compounds(VOCs) greatly affect human health and the environmental quality. Catalytic combustion/oxidation has been viewed as an efficient, economically feasible and environmentally friendly way for the elimination of VOCs. Supported metal catalyst is the preferred type of catalysts applied for VOCs catalytic combustion because of the synergy between active components and support as well as its flexibility in the composition. The presence of support not only plays the role of keeping the catalyst with good stability and mechanical strength, but also provides a large specific surface for the good dispersion of active components, which could effectively improve the performance of catalyst as well as decrease the usage of active components, especially the noble metal amount. Mesoporous molecular sieves, owing to their large surface area, unique porous structures, large pore size as well as uniform pore-size distribution, were viewed as superior support for dispersing active components. This review focuses on the recent development of mesoporous molecular sieve supported metal catalysts and their application in catalytic oxidation of VOCs. The effect of active component types, support structure, preparation method, precursors, etc. on the valence state, dispersion as well as the loading of active species were also discussed and summarized. Moreover, the corresponding conversion route of VOCs was also *** review aims to provide some enlightment for designing the supported metal catalysts with superior activity and stability for VOCs removal.

关键词： Volatile organic compound Mesoporous molecular sieves Supported catalyst Catalytic oxidation Reaction mechanism Influencing factors

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Photographic Appearance Enhancement via Detail-Based Dictionary Learning

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Journal of Computer Science & Technology 2017年第3期32卷 417-429页

作者： Zhi-Feng xie Shi Tang Dong-Jin Huang You-Dong Ding Li-Zhuang Ma Department of Film and Television Engineering Shanghai University Shanghai 200072 China Shanghai Engineering Research Center of Motion Picture Special Effects Shanghai 200072 China Department of Computer Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China

A number of edge-aware filters can efficiently boost the appearance of an image by detail decomposition and enhancement. However, they often fail to produce photographic enhanced appearance due to some visible artifacts, especially noise, halos and unnatural contrast. The essential reason is that the guidance and the constraint of high-quality appearance are not sufficient enough in the process of enhancement. Thus our idea is to train a detail dictionary from a lot of high-quality patches in order to constrain and control the entire appearance enhancement. In this paper, we propose a novel learning-based enhancement method for photographic appearance, which includes two main stages： dictionary training and sparse reconstruction. In the training stage, we construct a training set of detail patches extracted from some high-quality photos, and then train an overcomplete detail dictionary by iteratively minimizing an？1-norm energy function. In the reconstruction stage, we employ the trained dictionary to reconstruct the boosted detail layer, and further formalize a gradient-guided optimization function to improve the local coherence between patches. Moreover, we propose two evaluation metrics to measure the performance of appearance enhancement. The final experimental results have demonstrated the effectiveness of our learning-based enhancement method.

关键词： image enhancement dictionary learning edge-aware filter

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Interference alignment scheme for massive MIMO system

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The Journal of China Universities of Posts and Telecommunications 2014年第4期21卷 19-24页

作者： JIANG Jing LV Wei SUN Bo LU Guang-yue xie Yong-bin School of Communication and Information Engineering Xi'an University of Posts & Telecommunications Wireless Technology Pre-research Unit ZTE Cooperation

The performance of massive multiple-input multiple-output （MIMO） system is limited by pilot contamination. To reduce the pilot contamination, uplink and downlink precoding algorithms are put forward based on interference alignment criterion. In the uplink receiving processing, the target function aligns the pilot contamination and the interference signals to the same null space and acquires the maximal space degree of the desired signals. The uplink receiving precoding matrix is solved on maximal signal to interference plus noise ratio （SINR） criterion considering the impact of the pilot contamination on channel estimations. The uplink receiving precoding matrix is used as the downlink transmitting precoding matrix. Exploiting the channel reciprocity, it is proved that, if the uplink receiving precoding matrix achieves maximal S1NR, the identical precoding matrix can be used in the downlink transmission and acquires maximal signal to leakage plus noise ratio （SLNR）. Simulations show that the spectrum efficiency of the proposed algorithm can reach about 1.5 times higher than that of popular matched filtering （MF） precoding algorithm, and about 1.1 times higher than multi-cell minimum mean square error （MMSE） precoding algorithm. The performance of the proposed algorithm can be improved approximately linearly with the increasing of the number of antennas.

关键词： massive MIMO large scale MIMO pilot contamination precoding interference alignment

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Synthesis of CeO2 nanosheets with a room temperature ionic liquid assisted method

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Journal of Advanced Ceramics 2016年第2期5卷 111-116页

作者： Ting CHEN Zhixiang xie Weihui JIANG Wan JIANG Xiaojun ZHANG Jianmin LIU School of Material Science and Engineering Jingdezhen Ceramic Institute Jingdezhen 333001 China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Material Science & Engineering Donghua University Shanghai 201620 China

CeO2 nanosheets were directly synthesized by a precipitation process with the aid of 1-butyl-3-methyl-imidazolium ionic liquids at room temperature. The anion species and the concentration of the room temperature ionic liquids (RTILs) have a great influence on the morphology of the resulting products. The as-prepared CeO2 is irregular and agglomerated seriously in the absence of RTILs, while it changes from nanocube to nanosheet with increasing the RTIL concentration or decreasing the polarity and hydrophilicity in the orders [Bmim] Cl > [Bmim] Br > [Bmim] BF4 > [Bmim] PF6. The CeO2 nanocubes have relatively uniform grain size distribution with size of 4.5-6.4 nm, and the nanosheets are assembled by a great deal of nanocrystalline whose length and width extend to hundreds of nanometers. The as-synthesized CeO2 exhibits an excellent removal capacity for the organic pollutant Congo red dye, indicating its potential use in practical wastewater treatment.

关键词： ceria nanocrystalline ionic liquid room temperature catalysis

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Experimental Whale Falls in the South China Sea

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Ocean-Land-Atmosphere Research 2023年第1期2卷 57-60页

作者： Kedong Yin Dongsheng Zhang Wei xie Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) and School of Marine SciencesSun Yat-sen UniversityZhuhai 519082China Key Laboratory of Marine Ecosystem Dynamics Second Institute of OceanographyMinistry of Natural ResourcesHangzhouChina

Whale falls are a recent discovery of a new type of ecosystem in the deep sea with communities and succession that are different from other known *** represent unique biodiversity hotspots supporting numerous marine organisms in a small area over a relatively short period of *** transient flourishment of deep marine life in such environments is triggered by communities distinct from those of hydrothermal vents,cold seeps,and cold water ***(cetacean)falls attract deep-sea creatures that are otherwise difficult to *** faunal assemblages thrive sequentially in 4 successional stages:(a)the mobile scavenger stage,which removes the soft tissue;(b)the opportunist stage with dense colonization by heterotrophic macrofauna(particularly polychaetes and crustaceans);(c)the chemoautotrophic stage when thiophilic and methanogenic bacteria and archaea colonize the skeleton;and(d)the reefing stage when filter feeders colonize the remaining skeleton.

关键词： succession environments skeleton

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