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高质量发展目标下脱贫县农业产业化与农地利用生态效率耦合协调分析:以江西省为例

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生态与农村环境学报 2024年第5期40卷 645-656页

作者：曾艳廖成浩周宝亮郝柯锦南昌大学公共政策与管理学院江西南昌330031 南昌大学城乡治理与共同富裕研究中心江西南昌330031 江西省自然资源政策调查评估中心江西南昌330002

探究脱贫县农业产业化与农地利用生态效率耦合协调关系,对促进农业高质量发展具有重要意义。基于新发展理念,以江西省25个脱贫县为研究对象,构建农业产业化与农地利用生态效率耦合评价体系,借助耦合协调模型和泰尔指数模型测度两者的耦... 详细信息

探究脱贫县农业产业化与农地利用生态效率耦合协调关系,对促进农业高质量发展具有重要意义。基于新发展理念,以江西省25个脱贫县为研究对象,构建农业产业化与农地利用生态效率耦合评价体系,借助耦合协调模型和泰尔指数模型测度两者的耦合协调水平及其区域差异。结果表明:(1)2011—2020年,江西省脱贫县农地利用生态效率总体水平较高,年均值为0.738,赣南地区高于赣中和赣北地区;(2)2011—2020年,江西省脱贫县农业产业化发展指数总体水平较低,年均值为0.414,赣北地区最高,其次为赣中,赣南最低;(3)2011—2020年,脱贫县农业产业化与农地利用生态效率耦合协调指数由期初的0.321升至期末的0.342,总体处于中度失调和轻度失调阶段;(4)脱贫县地区内差异对泰尔指数总体贡献最大,县域农业发展协调性较弱。进一步分析可以发现,市场与政府的作用差异是导致农业产业化水平与农地利用生态效率存在差异的主要原因,综合运用行政和市场手段推动农业产业化发展是提高两者耦合协调水平的关键。

关键词：高质量发展脱贫县农业产业化农地利用生态效率耦合协调模型

MPC‑Based Coordinated Control of Gear Shifting Process for a Power‑split Hybrid Electric Bus with a Clutchless AMT

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Chinese Journal of Mechanical Engineering 2022年第6期35卷 377-389页

作者： Tong Liu Xiaohua zeng Dafeng Song State Key Laboratory of Automotive Simulation and Control Jilin UniversityChangchun 130025China

Two-speed clutchless automated manual transmission(AMT)has been widely implemented in electric vehicles for its simple structure and low *** contrast,due to the complex response characteristics of powertrain,utilizing clutchless AMT in a hybrid power system comes with complex coordination control *** order to address these issues,a power-split hybrid electric bus with two-speed clutchless AMT is studied in this paper,and a coordinated control method based on model predictive control(MPC)is used in gear shifting control strategy(GSCS)to improve gear shifting quality and reduce system ***,the dynamic model of power sources and other main powertrain components including a single planetary gear set and AMT are established on the basis of data-driven and mechanism modeling ***,the GSCS is put forward using the segmented control idea,and the shifting process is divided into five phases,including(I)unloading of drive motor,(II)shifting to neutral gear,(III)active speed synchronization by drive motor,(IV)engaging to new gear,and(V)resuming the drive motor’s power,among which the phases I and V have evident impact on the system ***,the MPC-based control method is adopted for these phases,and the fast compensation of driving torque is realized by combining the prediction model and quadratic programming *** simulation results show that the proposed GSCS can effectively reduce shift jerk and improve driving *** research proposes a coordinated control strategy of two-speed clutchless AMT,which can effectively improve the smoothness of gear shifting and provides a reference for the application of two speed clutchless AMT in power-split hybrid powertrains.

关键词： Power-split hybrid electric bus Shift jerk Model predictive control

Preliminary review about discussion of Vérard et al.(2015)——Words of the Editor-in-Chief

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Journal of Palaeogeography 2015年第3期4卷 231-233页

作者： zeng-Zhao Feng China University of Petroleum(Beijing)

The artfcte of Verard et el. （2015） proposed an important academic probtem ＂to reconstruct the altitude of otdtands and the water depth of pataeo-oceans of anywhere on the globe and at any geological time＂. Their heuristic method and model stimutated my deep thinking of this probtem. I have written an editorial ＂Hope to be from model to practice＂ in Vol. 4, No. 1, p. 63 of JoP. These two papers, especiatly the Verard et el.＇s paper, attracted enthusiastic discussions. Up to now, we have received 2 discussion articles and the repty articte of Dr. Christian Verard. This paper is a preliminary review of the above papers. Criticisms and further discussions are heartily wetcome.

关键词： 3D-model practice reat-wortd datasets base "A hundred flowersbtossom and a hundredschools of thoughtcontend"

Memory Analysis for Memristors and Memristive Recurrent Neural Networks

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IEEE/CAA Journal of Automatica Sinica 2020年第1期7卷 96-105页

作者： Gang Bao Yide Zhang Zhigang zeng Key Laboratory of Cascaded Hydropower Stations Operation and Control Electrical Engineering and New EnergyChina Three Gorges UniversityYichang 443002and Hubei Key Laboratory of Applied Mathematics(Hubei University)Wuhan 430074China Department of Medical Engineering California Institute of TechnologyPasadenaCalifornia 91125 USA School of Artificial Intelligence and Automation Huazhong University of Science and Technologyand also with the Key Laboratory of Image Processing and Intelligent Control of Education Ministry of ChinaWuhan 430074China

Traditional recurrent neural networks are composed of capacitors, inductors, resistors, and operational *** neural networks are constructed by replacing resistors with memristors. This paper focuses on the memory analysis,i.e. the initial value computation, of memristors. Firstly, we present the memory analysis for a single memristor based on memristors’ mathematical models with linear and nonlinear ***, we present the memory analysis for two memristors in series and parallel. Thirdly, we point out the difference between traditional neural networks and those that are memristive. Based on the current and voltage relationship of memristors, we use mathematical analysis and SPICE simulations to demonstrate the validity of our methods.

关键词： Dopant drift memory memristive neural networks memristor

Metal-based nanoparticles for cardiovascular disease diagnosis and therapy

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Particuology 2023年第1期72卷 94-111页

作者： Lei Li Yun zeng Gang Liu State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics Center for Molecular Imaging and Translational MedicineSchool of Public HealthXiamen UniversityXiamen 361102China Department of Pharmacy Xiamen Medical CollegeXiamen 361023China

Cardiovascular diseases (CVDs) are the most prominent cause of disability and mortality in the world. Although there have been a variety of therapeutic options for the management of CVDs, most of the traditional therapeutic strategies could not sufficiently stop or reduce the progression of these diseases and may result in some side effects. With the advance in nanotechnology, a number of metal-based nanoparticles have been developed and shown promising potentials in the treatment of CVDs. In this review, we provide a comprehensive review of researches on recent development of metal-based nanoparticles in diagnosis and therapy in CVDs as biomedical materials. We also discuss the challenges in the clinical translation and potential risks in their application of CVD therapy. Based on the ongoing research and applications, we can conclude metal-based nanoparticles are expected to become potential therapeutics for the treatment of CVDs. But their application is still in its infancy and much more efforts should be made to enforce a clinical breakthrough.

关键词： Metal-based nanoparticles Nanomedicine Cardiovascular diseases Diagnosis Therapy

Distance-Based Detection of Ag^(+) with Gold Nanoparticles-Coated Microfluidic Paper

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Journal of Analysis and Testing 2021年第1期5卷 11-18页

作者： Yu Zhang Yu-Long Li shu-Hua Cui Cong-Ying Wen Peng Li Jian-Feng Yu Shi-Ming Tang Jing-Bin zeng College of Science China University of Petroleum(East China)Qingdao 266580China College of Chemical Engineering China University of Petroleum(East China)Qingdao 266580China Qingdao Customs Technology Center Qingdao 266002China

In this study,we developed a microfluidic paper analysis device(μPAD)for distance-based detection of Ag^(+)in ***μPAD was manufactured by wax printing method on filter ***,a layer of gold nanoparticles(AuNPs)was deposited and ascorbic acid was printed on the *** the detection,Ag^(+)was reduced by ascorbic acid and coated on the surface of the AuNPs on the channel,forming Au@Ag core/shell *** on the capillary flow principle,diff erent concentrations of Ag^(+)formed diff erent distances of color ***,quantitative detection of Ag^(+)can be achieved by measuring the distance of the color *** detection limit of this method was as low as 1 mg·L^(-1)within 15 min and the interference of common metal ions in water can be *** conclusion,this method had successfully realized the leap from colorimetry to direct reading,realizing fast read and easy manipulation with low-cost.

关键词： Ag^(+)detection Colorimetric detection Distance-based detection Microfluidic paper analysis device AuNPs

Evaluation of cosmogenic activation of copper and germanium during production in Jinping Underground Laboratory

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Nuclear Science and Techniques 2020年第5期31卷 70-76页

作者： Wei-He zeng Hao Ma Ming zeng Zhi zeng Qian Yue Jian-Ping Cheng Jun-Li Li Department of Engineering Physics Tsinghua UniversityBeijing 100084China Key Laboratory of Particle and Radiation Imaging(Tsinghua University) Ministry of EducationBeijing 100084China College of Nuclear Science and Technology Beijing Normal UniversityBeijing 100875China

Intrinsic radiation of materials is one of the major backgrounds for many rare-event search ***,the production of pure materials in an underground laboratory is a promising approach for eliminating cosmogenic *** this paper,we demonstrate a procedure to evaluate the yields of cosmogenic radionuclides in copper and germanium in the second phase of the China Jinping Underground *** results show that for copper and germanium materials,the largest cosmogenic background comes from 3 H and57,58,60Co,and 3 H and 68Ge,respectively,which all have yields on the order of 10-7 kg-1 *** corresponding radioactivities after 90 days pf exposure underground are estimated to be lower than 10-6μBq kg-1.

关键词： Cosmic rays Cosmogenic radionuclides Underground laboratory Monte Carlo simulation

Catalytic oxidative desulfurization of gasoline using phosphotungstic acid supported on MWW zeolite

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Frontiers of Chemical Science and Engineering 2020年第4期14卷 546-560页

作者： Hanlu Wang Idris Jibrin Xingye zeng College of Chemical Engineering Guangdong University of Petrochemical TechnologyMaoming 525000China

Catalysts for the desulfurization of gasoline samples were synthesized via the immobilization of well-dispersed phosphotungstic acid(HPW)on Mobil compo-sition of matter-twenty-two(MWW)***-tion results indicated that these catalysts possess a mesoporous structure with the retention of the Keggin structure of immobilized *** reaction para-meters influencing sulfur removal were systematically investigated,including HPW loading,catalyst dosage,temperature,initial S-concentration,molar ratio of oxidant to sulfide(O/S),volume ratio of MeCN to model oil(Ext./oil),and sulfide *** 40 wt-%HPW/MWW catalyst exhibited the highest catalytic activity with 99.6%dibenzothiophene sulfur removal from prepared *** 40 wt-%HPW/MWW catalyst was recycled four times and could be easily ***,as an exploratory study,straight-run-gasoline and fluid catalytic cracking gasoline were employed to accurately evaluate the desulfurization performance of 40 wt-%HPW/*** research provides new insights into the development and application of catalysts for desulfurization of gasoline.

关键词： oxidative desulfurization phosphotungstic acid MWW wet impregnation adsorption energy

不同制式地铁车站公共区PM_(2.5)污染特征

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中国环境科学 2024年第5期44卷 2399-2406页

作者：纪文静曾俊杰李晓锋北京科技大学土木与资源工程学院北京100083 清华大学建筑学院北京100084

为了解屏蔽门和安全门制式地铁车站公共区PM_(2.5)的污染特征,分别选取不同制式地铁车站,同步采集分析车站公共区及室外的PM_(2.5)浓度及成分,并利用PMF法解析公共区PM_(2.5)的来源组成.结果显示,屏蔽门车站公共区PM_(2.5)的平均浓度显... 详细信息

为了解屏蔽门和安全门制式地铁车站公共区PM_(2.5)的污染特征,分别选取不同制式地铁车站,同步采集分析车站公共区及室外的PM_(2.5)浓度及成分,并利用PMF法解析公共区PM_(2.5)的来源组成.结果显示,屏蔽门车站公共区PM_(2.5)的平均浓度显著低于安全门车站,但高于站外大气PM_(2.5)浓度.安全门车站公共区中Fe、Cu元素的站内外浓度比(I/O比)分别为32和9,远超屏蔽门车站Fe、Cu的I/O比(16和4).依据源解析结果将公共区PM_(2.5)来源区分为站内源和站外源,安全门车站中站内源贡献达74%,产生的元素浓度和为40.1μg/m^(3),而屏蔽门车站中站内源贡献为69%,产生的元素浓度和仅18.8μg/m^(3).此外,两类车站中站内源对站内重金属元素贡献均超过80%,但安全门车站中站内源产生的重金属浓度为36.9μg/m^(3),而屏蔽门车站仅为17.5μg/m^(3),相比安全门降低53%.因此,屏蔽门制式相比安全门制式可以显著降低地铁车站公共区PM_(2.5)质量浓度及PM_(2.5)中重金属元素含量.

关键词：地铁车站细颗粒物源解析重金属