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中国循环杂志 2018年第S1期 110-111页

作者： Yue ma Yujie Zhou Beijing Anzhen Hospital Capital Medical University Beijing Institute of Heart Lung and Blood Vessel Disease

Objective Percutaneous coronary intervention (PCI) is the treatment of myocardial ischemia perfusion by using cardiac catheter technique to dredge the stenosis or occlusion of the coronary artery. Recent studies have ...

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Dynamic Coupled Analysis of the Floating Platform Using the Asynchronous Coupling Algorithm

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Journal of marine Science and Application 2014年第1期13卷 85-91页

作者： Shan ma Wenyang Duan College of Shipbuilding Engineering Harbin Engineering University

This paper discusses the numerical modeling of the dynamic coupled analysis of the floating platform and mooring/risers using the asynchronous coupling algorithm with the purpose to improve the computational efficiency when multiple lines are connected to the platform. The numerical model of the platform motion simulation in wave is presented. Additionally, how the asynchronous coupling algorithm is implemented during the dynamic coupling analysis is introduced. Through a comparison of the numerical results of our developed model with commercial software for a SPAR platform, the developed numerical model is checked and validated.

关键词： floating platform platform motions dynamic coupledanalysis asynchronous coupling algorithm mooring line tensions SPAR platform

Sparse Least Square Support Vector machines based on Random Entropy 36

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Alternative technology for the recovery of butyl acetate with low concentration:high capacity adsorbent and high efficiency adsorption

第36届中国控制会议

作者： Wenlu ma Han Liu Faculty of Automation and Information Engineering Xi'an University of Technology Shaanxi Key Lab. of Complex System Control and Intelligent Information Processing Faculty of Automation and Information EngineeringXi’an University of Technology

ISBN: (纸本)9781538629185

Least squares support vector machines（LSSVM） has a good performance in small data samples, but can’t solve the large-scale sample problems. In this paper, large data set sparse least squares support vector machines model based on stochastic entropy is proposed, and it can be applied to large-scale data samples. Firstly, the large-scale data set is divided into several subsets. Then the entropy method is used to the sparse samples in each subset. Finally, we use sparse samples sets as training samples, and use least squares support vector machine algorithm to train. The results show that the sparse least squares support vector machine model based on entropy can effectively solve the problem of large-scale data.

关键词： Sparsity LSSVM Large-scale data Random Entropy

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Green Chemical Engineering 2024年第2期5卷 236-244页

作者： Chi ma Lihong Zhao Zhengxin mao Hao Su Qingfen Liu CAS Key Laboratory of Green Process and Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing100049China

Industrial pharmaceutical wastewater usually contains butyl acetate(BA)with a concentration of 1 wt%-7 wt%,and the traditional method for BA recovery is distillation with high energy *** method is developed to recover BA with low concentration for the high efficiency and low energy *** polar polyacrylate resins with macroporous structure of 233.1 nm and average particle size of about 526.5μm are successfully synthesized by suspension polymerization and used for the BA adsorption and *** maximum adsorption capacity reaches 171.1 mg g^(-1)with relative standard deviation(RSD)value of 0.2%,which is more than twice the results in the *** BA desorption rate is 97.0%at 100℃with RSD value of 0.4%,and the resins are beneficial to the reuse in the adsorption-desorption *** adsorption thermodynamics and kinetics are investigated,and the BA adsorption is a spontaneous and endothermic process with the increase of disorder *** process is mainly contributed by physical absorption and agree well with Freundlich model and pseudo-first-order adsorption kinetic *** adsorption method avoids boiling a large amount of wastewater and hopefully provides a novel alternative technology for the BA recovery.

关键词： Butyl acetate recovery Resin adsorption Desorption Thermodynamics Kinetics

Carbon Dots Derived from Coffee Residue for Sensitive and Selective Detection of Picric Acid and Iron(III)Ions

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Chemical Research in Chinese Universities 2021年第3期37卷 623-628页

作者： ZONG Siyu WANG Bolun ma Wenyan YAN Yan LI Jiyang University Changchun130012P.R.China

A facile method was developed to prepare carbon dots(CDs)by pyrolysis and etching of coffee *** as-prepared CDs show uniform spherical nanoparticles with an average size of 2.3 nm and exhibit excitation-dependent fluorescence ***,CDs also exhibit strong fluorescence quenching to nitro compounds and metal ions in both water and ethanol solutions,which could act as a platform for dual detection of PA(picric acid)and Fe^(3+)ions with low detection limits of 0.26 and 0.83µmol/L,*** work provides a novel method for preparation of environmental-friendly fluorescent CDs and shows their potential applications in photoluminescence sensors.

关键词： Carbon dot Coffee residue Luminescence Detection

Aryl Diazonium Salt-Triggered Cyclization a nd Cycloaddition Reactions: Past, Present, and Future

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Chinese Journal of Chemistry 2020年第10期38卷 1132-1152页

作者： Fa-Guang Zhang Zhen Chen Chi Wai Cheung Jun-An ma Department of Chemistry Tianjin Key Laboratory of Molecular Optoelectronic SciencesFrontiers Science Center for Synthetic Biology(Ministry of Education)and Tianjin Collaborative Innovation Center of Chemical Science&EngineeringTinjin UniversityTianjin 300072China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityBinhai New CityFuzhou 350207FujianChina

Aryl diazonium salts occupy a privileged role in synthetic chemistry owing to their ready availability and versatile *** their applications in accessing diversely functionalized arene derivatives via denitrogenation-coupling and reduction/addition reactions have been well recognized by practitioners in both academia and industry,recent renaissance in chemical transformations of retaining the key N2-unit has emerged as a powerful technique to construct various A/-*** review covers the history and latest advances in cyclization and cycloaddition reactions using aryl diazonium salts as N2-annulation *** scope,applications,and opportunities in exploring new chemical space by this sustainable strategy are summarized and discussed.

关键词： salts summarized retaining

Effects of nutrient limitations on the sinking velocity of Thalassiosira weissflogii

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Acta Oceanologica Sinica 2024年第6期43卷 163-172页

作者： Jie Zhu Qiang Hao Wei Zhang Yingying ma Jiangning Zeng Ocean College Zhejiang UniversityZhoushan 316000China Second Institute of Oceanography Ministry of Natural ResourcesHangzhou 310012China Key Laboratory of marine Ecosystem Dynamics Ministry of Natural ResourcesHangzhou 310012China Zhejiang Key Laboratory of Nearshore Engineering Environment and Ecological Security Hangzhou 310012China Tianjin Key Lab of Aqua-Ecology and Aquaculture College of FisheriesTianjin Agricultural UniversityTianjin 300384China

The sinking of diatoms is critic al to the formation of oceanic biological pumps and coastal hypoxic ***,little is known about the effects of different nutrient restrictions on diatom *** this study,we measured the sinking velocity(SV) of Thalassiosira weissflogii using a new phytoplankton video observation instrument and analyzed major biochemical components under varying nutrient *** results showed that the SV of *** under different nutrient limitation conditions varied *** highest SV of(1.77±0.02) m/d was obtained under nitrate limitation,signific antly surpassing that under phosphate limitation at(0.98±0.13) m/*** the nutrient limitation was released,the SV steadily decreased to(0.32±0.03) m/d and(0.15±0.05) m/d,***;under conditions with limited nitrate and phosphate concentrations,the SV values of *** significantly positively correlated with the lipid content(P marily related to the intracellular compo sition,which is controlled by nutrient conditions but did not significantly correlate with transparent extracellular polymer and biosilica *** results of this study help to understand the regulation of the vertical sinking process of diatoms by nutrient restriction and provide new insights into phytoplankton dynamics and their relationship with the marine nutrient structure.

关键词： nutrient limitation Thalassiosira weissflogii sinking velocity biochemical component lipid content

The Asymptotical Stability Of a Warm Standby System with Priority in Use And Repair

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The Asymptotical Stability Of a Warm Standby System with Pri...

Biosynthesis of phycocyanobilin in recombinant Escherichia coli

第25届中国控制与决策会议

作者： Hongjun Sun Lixia ma Population Theory Staff in Center for Population and Family Planning Cadre Training The Logisitics College Department of mathematics Tianjin University

ISBN: (纸本)9781467355322

In this paper we consider a warm standby repairable system that consists of two dissimilar components and one repairman. Suppose that the life of each component satisfies the exponentially distribution and the repair time of the component satisfies the general distribution, the component 1 has priority in use and repair. Firstly, a mathematical model is built via the differential and partial differential equations, then by using the C0 -semigroup theory and analyzing the spectra distribution of the system operator, the unique existence of the solution is derived. Then the non-negative steady-state solution and the asymptotic stability of the system are derived.

关键词： Linear operator C0 Semigroup Well-Posedness Asymptotic Stability

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Journal of Oceanology and Limnology 2020年第2期38卷 529-538页

作者： ma Chengbo LI Wenjun GE Baosheng LIN Jian QIN Song College of Life Sciences Yantai UniversityYantai 264005China Yantai Institute of Coastal Zone Research Chinese Academy of SciencesYantai 264003China Center for Bioengineering and Biotechnology China University of Petroleum(East China)Qingdao 266580China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China

The recombinant expression of phycocyanobilin(PCB)was carried out in Escherichia coli,and the best fermentation conditions of recombinant *** biosynthesized PCB are optimized in the response surface methodology to improve PCB *** recombinant PCB is extracted,isolated,and purified by methanol and chloroform *** PCB is validated in UV-vis spectroscopy,high-pressure liquid chromatography,and mass *** addition,the anti-oxidant activities of the recombinant PCB are *** best induction conditions that optimized by Design Expert 8.0 software include:lactose concentration 4 mmol/L,induction temperature 24.69℃,induction time 4.6 h,and induction duration 13.57 h,under which the PCB expression level reached approximately 13 mg PCB/L,which is more than four times of previously reported 3 mg PCB/*** maximum absorption peak of the recombinant PCB is located at 680 nm with a high fluorescence intensity of 470 *** recombinant PCB has a good ability to scavenge 2,2-diphenyl-1-picrylhydrazyl(DPPH)free radicals.

关键词： combinational biosynthesis phycocyanobilin response surface methodology antioxidant

Connection-Free Transmission for Critical MTC

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China Communications 2024年第8期21卷 162-171页

作者： Li Zhigang Yuan Zhifeng ma Yihua Liang Chulong ZTE Corporation Shenzhen 518057China State Key Laboratory of Mobile Network and Mobile Multimedia Technology Shenzhen 518055China

In this paper,a contention-based connection-free transmission scheme is proposed to meet the stringent requirements of ultra-reliability and low-latency for critical machine-type communication(cMTC).To improve reliability,we design multiple independent sparse orthogonal pilots(MISOP)to significantly reduce the probability of pilot collision to the order of 10^(−5).Besides,the advancements of massive MIMO(mMIMO)are exploited to further enhance the *** achieve low latency,connection-free slot-based one-shot transmission without retransmissions is *** the receiver side,single round of multi-user detection(MUD)without interference cancellation(IC)can reduce the processing *** imprecise synchronization between cMTC device and the gNB in connection-free transmission,e.g.,time and frequency offsets,are also *** simulation results shows that the proposed scheme can well satisfy the ambitious requirements of cMTC,and has the potential applications in supporting massive cMTC devices in 6G.

关键词： connection-free critical MTC pilot collision sparse orthogonal pilot