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Genetic benefits of female from extra-pair paternity are context dependent within the socially monogamous Tree Sparrow

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Avian Research 2024年第3期15卷 395-401页

作者： Wenzhi Yang Yue Shen yuquan miao Zhaocun Lin Yingmei Zhang Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution School of Life SciencesLanzhou UniversityLanzhou730000China School of Life Science Ningxia UniversityYinchuan750021China

Females actively seek extra-pair paternity(EPP)to acquire a fitness advantage for their ***“contextdependence hypothesis”posits that female extra-pair mate choice has plasticity in response to environmental conditions,and therefore magnitude of female genetic benefits from EPP depends on the environmental ***,chronic heavy metal pollution can cause adverse effects on fitness-related traits of wild ***,few studies were available on the interactions between heavy metal pollution and *** selected an area that was contaminated by heavy metals for more than 60 years(Baiyin,BY),a relatively unpolluted area(Liujiaxia,LJX),and Tree Sparrows(Passer montanus)as study species to explore the response of female extrapair mate choice and genetic benefits from EPP to heavy metal pollution in socially monogamous *** relatedness between social mates and extra-pair mates was ***,we compared the body size and heterozygosity of extra-pair offspring(EPO),within-pair offspring(WPO),social males and extra-pair males from the two Tree Sparrow *** found that at BY,female Tree Sparrows tended to choose extra-pair males with larger body size and lower genetic similarity,thereby producing higher heterozygosity and larger body size of EPO compared with those of ***,no similar phenomenon was observed in the Tree Sparrow population from *** addition,there was a significant interaction between population and paternity in the analyses of the fitness-related traits,suggesting that environmental variation could affect female genetic benefits from *** study confirmed the existence of presumed interactions between environmental pollution and EPP within the natural population of socially monogamous Tree *** findings shed lights on the possible effects of long-term environmental stress on mating system in wild birds.

关键词： Context-dependence Fitness advantage Heavy metal pollution Mating system Passer montanus Passerine

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Operational Plan,Effect Verification,and Key Technical Settings for a Stadium-Scale Artificial Rain Reduction Experiment

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Journal of Meteorological Research 2023年第5期37卷 643-665页

作者： yuquan ZHOU Siyao LIU miao CAI Junlin LONG Jia WANG CMA Cloud–Precipitation Physics and Weather Modification Key Laboratory(CPML) Weather Modification CentreChina Meteorological Administration(CMA)Beijing 100081 School of Electronic Engineering Chengdu University of Information TechnologyChengdu 610225 College of Meteorological Observation Chengdu University of Information Technology/CMA Key Laboratory of Atmospheric SoundingChengdu 610225 Jiangsu Weather Modification Center Nanjing 210000

To explore the key technologies of artificial weather modification for specific targets(e.g.,a stadium)and improve the efficiency of artificial rainfall modification for major events,this study conducts an artificial rainfall reduction experiment for the closing ceremony of Nanjing Youth Olympic Games on 28 August *** retrievals,radar observations,sounding data,and other sources of information as well as Cloud and Precipitation Accurate Analysis System(CPAS)are used in this *** main conclusions are as follows.(1)On 28 August 2014,a large-scale cumulus cloud system with mixed-phase stratocumulus and stratus precipitation was *** system was influenced by the weak shear of a low-level trough and the precipitation was dominated by cold clouds with dry layers between ***,we adopted the crystal-priming over-catalytic hypothesis and conducted a rocket-catalytic rain abatement operation at a certain distance(100–25 km)from the *** shootings of different intensities were implemented for two echoes that affected the stadium successively(two rounds of 15 rocket shootings within15 min for an isolated weak echo IA;multiple rounds of 156 rocket shootings within 80 min for a strong echo IB).Amazingly,after the shootings with the catalysis in the air,reflectivity of the two echoes was reduced at all altitudes with the most significant reduction at the 2-km altitude,and the time needed for the obvious reduction was 40 *** most obvious reduction of the two echoes then maintained for 60 and 53 min,respectively,and the operation time needed for the echo zone to recover after the stop of rocket shooting was 108 min for echo IA and 90 min for echo *** two echoes moving across the stadium during the time period of the closing ceremony(2000–2130 local time)were at their minimal strengths,with almost no echo over the target *** demonstrates that the rocket shooting strategy of over-crystallization catalysis is effective,and th

关键词： target area artificial rainfall abatement radar monitoring weather modification plan effect analysis

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A QR DECOMPOSITION BASED SOLVER FOR THE LEAST SQUARES PROBLEMS FROM THE MINIMAL RESIDUAL METHOD FOR THE SYLVESTER EQUATION

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Journal of Computational Mathematics 2007年第5期25卷 531-542页

作者： Zhongxiao Jia yuquan Sun Department of Mathematical Sciences Tsinghua University Beijing 100084 China

Based on the generalized minimal residual （GMRES） principle, Hu and Reichel proposed a minimal residual algorithm for the Sylvester equation. The algorithm requires the solution of a structured least squares problem. They form the normal equations of the least squares problem and then solve it by a direct solver, so it is susceptible to instability. In this paper, by exploiting the special structure of the least squares problem and working on the problem directly, a numerically stable QR decomposition based algorithm is presented for the problem. The new algorithm is more stable than the normal equations algorithm of Hu and Reichel. Numerical experiments are reported to confirm the superior stability of the new algorithm.

关键词： Least-squares solution Preconditioning Generalized singular value decomposition.

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Standard tri-point transition function

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Science China Mathematics 2005年第7期48卷 904-914页

作者： XIE yuquan School of Mathematics and Computational Science Xiangtan University Xiangtan 411105 China

It is usually difficult to express a family of tri-point transition function (TTF)by a transition matrix as Markov processes with one parameter. In this paper, we define three kinds of connection matrixes on the states of standard tri-point transition function (STTF) and study their essential character, give a constructive method on the constantvalue standard tri-point transition function and a general expression of the state-symmetric standard tri-point transition function by a sequence of the transition matrixes of special and simple Markov processes with one parameter.

关键词： tri-point transition function, standard, constant-value, state-symmetry, connection matrix, Markov processes.

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Function S-Rough sets and its applications

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Journal of Systems Engineering and Electronics 2006年第2期17卷 331-338页

作者： Cui yuquan Shi Kaiquan School of Mathematics and System Sciences Shandong Univ. Jinan 250100 P.R. China

Based on S-rough sets（singular rough sets）, this paper presents function S-rough sets （function singular rough sets）and its mathematical structures and features. Function S-rough sets has two forms： function one direction S-rough sets （function one direction singular rough sets） and function two direction S-rough sets （function two direction singular rough sets）. This paper advances the relationship theorem of function S-rough sets and S-rough sets. Function S-rough sets is the general form of S-rough sets, and S-rough sets is the special ease of function S-rough sets. In this paper, applications of function S-rough sets in rough law mining-discovery of system are given. Function S-rough sets is a new research direction of rough sets and rough system.

关键词： function S-rough sets structure of function S-rough sets relationship theorem rough law mining-discovery applications.

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Statistical QoS Guarantees for Energy Harvesting Cognitive Radio Networks

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Journal of Communications and Information Networks 2020年第1期5卷 100-110页

作者： yuquan Xiao Wenchi Cheng State Key Laboratory of Integrated Services Networks Xidian UniversityXi’an 710071China

Spectrum and energy resources are very important for the rapidly developing of thefifth generation(5G)wireless communication *** radio and energy harvesting technologies,which focus on the spectrum efficiency and the energy efficiency,respectively,can be jointly used for solving the scarcities of spectrum and energy in energy harvesting cognitive radio networks(EHCRNs),where the energy is absorbed from ambient space and spectrum is licensed to the primary ***,how to guarantee the quality of service(QoS)for EHCRNs is still a challenging *** this paper,we develop the optimal power and rate adaptation scheme under statistical QoS provisioning for *** particular,we analyze the power constraints of ***,we formulate the effective capacity maximization problem for EHCRNs,solving which we obtain the closedform of the optimal power allocation and rate adaptation scheme under different power *** analyses verify the effective capacity enhancement and validate the relationships among the effective capacity,the QoS exponent,the energy arrival rate,and the average interference power.

关键词： cognitive radio energy harvesting effective capacity quality of service power allocation

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Opportunities and challenges in the nanoparticles for nucleic acid therapeutics: the first approval of an RNAi nanoparticle for treatment of a rare disease

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National Science Review 2019年第6期6卷 1105-1106页

作者： Xiawei Wei yuquan Wei Laboratory of Aging Research and Nanotoxicology State Key Laboratory of Biotherapy National Clinical Research Center for Geriatrics West China Hospital Sichuan University

Nanoparticle-based nucleic acid therapeutics have drawn considerable attention over recent decades. By using terms such as ‘nanoparticle’ and ‘gene delivery’ in a Pub Med search, we found that 10 years ago throughout 2008 there were only 725 such papers published;however, in 2017, over 4700 papers were published with the same keywords.

关键词： the first approval of an RNAi nanoparticle for treatment of a rare disease Opportunities and challenges in the nanoparticles for nucleic acid therapeutics

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Coherence evolution in two-qubit system going through amplitude damping channel

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Science China(Physics,Mechanics & Astronomy) 2018年第2期61卷 12-17页

作者： MingJing Zhao Teng Ma yuquan Ma School of Science Beijing Information Science and Technology University State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics Tsinghua University

In this paper, we analyze the evolution of quantum coherence in a two-qubit system going through the amplitude damping channel. After they have gone through this channel many times, we analyze the systems with respect to the coherence of their output states. When only one subsystem goes through the channel, frozen coherence occurs if and only if this subsystem is incoherent and an auxiliary condition is satisfied for the other subsystem. When two subsystems go through this quantum channel, quantum coherence can be frozen if and only if the two subsystems are both incoherent. We also investigate the evolution of coherence for maximally incoherent-coherent states and derive an equation for the output states after one or two subsystems have gone through the amplitude damping channel.

关键词： quantum coherence amplitude damping channel frozen coherence

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PI-type Iterative Learning Control for Nonlinear Electro-hydraulic Servo Vibrating System

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Chinese Journal of Mechanical Engineering 2009年第3期22卷 451-455页

作者： LUO Xiaohui ZHU yuquan HU Junhua School of Mechanical Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China

For the electro-hydraulic servo vibrating system（ESVS） with the characteristics of non-linearity and repeating motion, a novel method, PI-type iterative learning control（ILC）, is proposed on the basis of traditional PID control. By using memory ability of computer, the method keeps last time＇s tracking error of the system and then applies the error information to the next time＇s control process. At the same time, a forgetting factor and a D-type learning law of feedforward fuzzy-inferring referenced displacement error under the optimal objective are employed to enhance the systemic robustness and tracking accuracy. The results of simulation and test reveal that the algorithm has a trait of high repeating precision, and could restrain the influence of nonlinear factors like leaking, external disturbance, aerated oil, etc. Compared with traditional PID control, it could better meet the requirement of nonlinear electro -hydraulic servo vibrating system.

关键词： electro-hydraulic vibrating system PI iterative learning forgetting factor fuzzy inference

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Diversity of the reaction mechanisms of SAM-dependent enzymes

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Acta Pharmaceutica Sinica B 2021年第3期11卷 632-650页

作者： Qiu Sun Mengyuan Huang yuquan Wei State Key Laboratory of Biotherapy Cancer CenterWest China HospitalSichuan University and Collaborative Innovation Center for BiotherapyChengdu 610041China

S-adenosylmethionine(SAM) is ubiquitous in living organisms and is of great significance in metabolism as a cofactor of various enzymes. Methyltransferases(MTases), a major group of SAMdependent enzymes, catalyze methyl transfer from SAM to C, O, N, and S atoms in small-molecule secondary metabolites and macromolecules, including proteins and nucleic acids. MTases have long been a hot topic in biomedical research because of their crucial role in epigenetic regulation of macromolecules and biosynthesis of natural products with prolific pharmacological moieties. However, another group of SAM-dependent enzymes, sharing similar core domains with MTases, can catalyze nonmethylation reactions and have multiple functions. Herein, we mainly describe the nonmethylation reactions of SAMdependent enzymes in biosynthesis. First, we compare the structural and mechanistic similarities and distinctions between SAM-dependent MTases and the non-methylating SAM-dependent enzymes. Second,we summarize the reactions catalyzed by these enzymes and explore the mechanisms. Finally, we discuss the structural conservation and catalytical diversity of class I-like non-methylating SAM-dependent enzymes and propose a possibility in enzymes evolution, suggesting future perspectives for enzymemediated chemistry and biotechnology, which will help the development of new methods for drug synthesis.

关键词： SAM-dependent enzyme Catalytic mechanism Biocatalysis Nonmethylation reaction Methyltransferase

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