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Energy-Efficient Optimal Guaranteed Cost Intermittent-Switch Control of a Direct Expansion Air Conditioning System

IEEE/CAA Journal of Automatica Sinica 2021年第11期8卷 1852-1866页

作者： jun mei Zhenyu Lu junhao Hu Yuling Fan School of Mathematics and Statistics South-Central University for NationalitiesWuhan 430074China School of Electronic and Information Engineering Nanjing University of Information Science and TechnologyNanjing 210044China College of Informatics Huazhong Agricultural UniversityWuhan 430072China

To improve the energy efficiency of a direct expansion air conditioning(DX A/C) system while guaranteeing occupancy comfort, a hierarchical controller for a DX A/C system with uncertain parameters is proposed. The control strategy consists of an open loop optimization controller and a closed-loop guaranteed cost periodically intermittent-switch controller(GCPISC). The error dynamics system of the closed-loop control is modelled based on the GCPISC principle. The difference,compared to the previous DX A/C system control methods, is that the controller designed in this paper performs control at discrete times. For the ease of designing the controller, a series of matrix inequalities are derived to be the sufficient conditions of the lower-layer closed-loop GCPISC controller. In this way, the DX A/C system output is derived to follow the optimal references obtained through the upper-layer open loop controller in exponential time, and the energy efficiency of the system is improved. Moreover, a static optimization problem is addressed for obtaining an optimal GCPISC law to ensure a minimum upper bound on the DX A/C system performance considering energy efficiency and output tracking error. The advantages of the designed hierarchical controller for a DX A/C system with uncertain parameters are demonstrated through some simulation results.

关键词： Energy efficiency hierarchical control open loop optimal control optimal guaranteed cost periodically intermittent-switch control

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Synthesis of 2-(N-formyl)-5-aryl/aryloxymethyl-1,3,4-thiadiazoles with potential bioactivity in PEG-400

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Chinese Chemical Letters 2010年第3期21卷 301-304页

作者： wang, Xi Cun Ding, Xiao mei wang, Sheng Qing Chen, Xue Fei Quan, Zheng jun Minist Educ Key Lab Ecoenvironm Related Polymer Mat Beijing Peoples R China NW Normal Univ Coll Chem & Chem Engn Gansu Key Lab Polymer Mat Lanzhou 730070 Peoples R China

An environmental benign procedure for synthesis of 2-(N-formyl)-5-aryl/aryloxymethyl-1,3,4-thiadiazoles has been developed by reaction of 2-amino-5-aryl/aryloxymethyl-1,3,4-thiadiazoles with formic acid in *** key advantages of this protocol are the shorter reaction time,higher yields,lower cost,simple workup,and environment-friendly compared to conventional organic solvent *** present method does not involve any hazardous organic solvent or catalyst.

关键词： 2-(N-Formyl)-5-aryl/aryloxymethyl-1 3 4-thiadiazoles 2-Amino-5-aryl/aryloxymethyl-1 PEG-400 Synthesis

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Vapour-phase O-methylation of Catechol with Methanol on Ti-containing Phosphate Catalysts

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Chemical Research in Chinese Universities 2006年第4期22卷 533-536页

作者： ZHU Xiao-mei LI Xue-mei LIU Gang ZOU Xiu-jing wang Yan-li JIA Ming-jun ZHANG Wen-xiang College of Chemistry Jilin University Changchun 130021 P. R. China Shanghai Huayi Acrylic Acid Co. Ltd. Shanghai 200137 P. R. China

Ti-containing phosphate（ Ti-P-O ） catalysts with different molar ratios of P to Ti （0--2. 0 ） were synthesized and characterized by XRD, N2-adsorption/desorption, IR and temperature-programmed desorption （TPD） methods. The catalytic properties of Ti-P-O samples in the vapor-phase O-methylation of catechol with methanol were also studied. The catechol conversion increases with the increase of the molar ratio of P to Ti in a range of 0-0. 33, while a further increase in the P content leads to a decrease of the catalytic activity. Meanwhile, the selectivities of the catalysts to the main product（guaiacol） increase gradually with the increase of the molar ratio of P to Ti. The presence of relatively strong Lewis acidic and/or basic sites in the P-free catalyst should be responsible for the formation of C-alkylation products. The weak acid-base characteristics of the catalysts are favourable for the mono-O-methylation of catechol. In comparison with the Lewis acidic sites, the Bronsted acidic sites on the catalysts are more active for the title reaction.

关键词： Phosphates Acid-base catalysis Guaiacol Catechol O-Methylation

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枳壳主要化学成分研究进展

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食品与药品 2018年第3期20卷 244-247页

作者：徐云徐建白冰肖俊美王宝成吉林修正药业新药开发有限公司吉林省中药标准化关键工程技术重点实验室吉林长春130103 通药制药集团股份有限公司吉林通化134000

枳壳为药食两用植物,具有广泛的应用前景。本文结合枳壳药理作用,对近年枳壳主要化学成分、提取工艺及质量控制研究进展作一综述,为枳壳药材的开发利用提供参考。

关键词：枳壳化学成分提取工艺质量控制药理作用

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火龙果连作土壤细菌多样性与酶活性对酚酸类代谢产物的响应特征

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农业生物技术学报 2025年第1期33卷 30-42页

作者：谢勇俊秦文连周婧王孟佳潘小卓秦孝杰唐景美王一兵广西民族大学海洋与生物技术学院/广西多糖材料与改性重点实验室广西南亚热带农业科学研究所

随着火龙果(Hylocereus undatus)种植年限的增加，酚酸类代谢产物会逐渐在土壤中积累，引起土壤病原细菌、真菌及线虫等定殖，最终导致连作障碍的发生。本研究采用纯培养技术，从连作6年和3年的火龙果根际土壤中分离出可培养细菌，并通... 详细信息

随着火龙果(Hylocereus undatus)种植年限的增加，酚酸类代谢产物会逐渐在土壤中积累，引起土壤病原细菌、真菌及线虫等定殖，最终导致连作障碍的发生。本研究采用纯培养技术，从连作6年和3年的火龙果根际土壤中分离出可培养细菌，并通过16S r RNA基因序列进行种属鉴定。同时，采用土壤酶活性测定法研究不同种植年限火龙果土壤的酶活变化，利用高效液相色谱法(high performance liquid chromatography, HPLC)测定土壤中酚酸类代谢产物的种类及含量，分析土壤细菌与酶活性对酚酸类代谢产物的响应关系。结果显示，连作使火龙果中的细菌群落多样性增加，从火龙果的根际土壤中分离出4门、5纲、10目、16科、21属、56种共112株细菌，其中假单胞菌属(Pseudomonas)、伯克霍尔德菌属(Burkholderia)和芽胞杆菌属(Bacillus)等生防菌的相对丰度下降了23.36%。火龙果的连作种植导致土壤中过氧化氢酶和纤维素酶活性下降，脲酶和蔗糖酶活性上升。连作导致没食子酸、阿魏酸、水杨酸和苯甲酸的含量分别增加了163.80%、194.92%、341.57%和175.93%。响应关系分析显示，酚酸与微生物群落结构之间具有一定的关联性。上述结果表明，连作种植导致没食子酸、阿魏酸、水杨酸和苯甲酸等酚酸物质积累，引起了土壤微生物群落结构的失衡，有益微生物减少，土壤酶活力发生改变，植物营养物质的吸收受到影响，最终导致连作障碍的产生。本研究为后续开发具有降解酚酸功能的微生物菌剂及火龙果的田间管理技术提供基础数据。

关键词：火龙果连作障碍酚酸土壤酶活性土壤微生物

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Generalized Synchronization in a Drive-Response System

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Communications in Theoretical Physics 2008年第2期49卷 391-395页

作者： YANG jun-Zhong ZHANG mei School of Science Beijing University of Posts and Telecommunications Beijing 100876 China Center for Advanced Study Tsinghua University Beijing 100084 China

The phenomena of GS in a drive-response system have been studied. Several kinds of GS are found： the driver-induced GS, the responser-induced GS, and the intermediate GS. The mechanism generating these types of GS is... 详细信息

关键词： generalized synchronization drive-response system

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Spectrum projection with a bandgap-gradient perovskite cell for colour perception

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Light(Science & Applications) 2020年第1期9卷 466-478页

作者： mei-Na Zhang Xiaohan Wu Antoine Riaud Xiao-Lin wang Fengxian Xie Wen-jun Liu Yongfeng mei David Wei Zhang Shi-Jin Ding State Key Laboratory of ASIC and System School of MicroelectronicsFudan UniversityShanghai 200433China Engineering Research Centre of Advanced Lighting Technology Ministry of EducationFudan UniversityShanghai 200433China Department of Materials Science Fudan UniversityShanghai 200433China

Optoelectronic devices for light or spectral signal detection are desired for use in a wide range of applications,including sensing,imaging,optical communications,and in situ ***,existing photodetectors indicate only light intensities,whereas multiphotosensor spectrometers require at least a chip-level assembly and can generate redundant signals for applications that do not need detailed spectral *** by human visual and psychological light perceptions,the compression of spectral information into representative intensities and colours may simplify spectrum processing at the device ***,we propose a concept of spectrum projection using a bandgap-gradient semiconductor cell for intensity and colour ***-gradient perovskites,prepared by a halide-exchanging method via dipping in a solution,are developed as the photoactive layer of the *** fabricated cell produces two output signals:one shows linear responses to both photon energy and flux,while the other depends on only photon ***,by combining the two signals,the single device can project the monochromatic and broadband spectra into the total photon fluxes and average photon energies(i.e.,intensities and hues),which are in good agreement with those obtained from a commercial photodetector and *** changing illumination in real time,the prepared device can instantaneously provide intensity and hue *** addition,the flexibility and chemical/bio-sensing of the device via colour comparison are ***,this work shows a human visual-like method of spectrum projection and colour perception based on a single device,providing a paradigm for high-efficiency spectrum-processing applications.

关键词： projection perovskite gradient

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Magnetic-activated cell sorting of nonapoptotic spermatozoa with a high DNA fragmentation index improves the live birth rate and decreases transfer cycles of IVF/ICSI

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Asian Journal of Andrology 2022年第4期24卷 367-372页

作者： Jie mei Lin-jun Chen Xin-Xin Zhu Wen Yu Qing-Qiang Gao Hai-Xiang Sun Li-jun Ding jun-Xia wang Center for Reproductive Medicine Department of Obstetrics and GynecologyNanjing Drum Tower HospitalThe Affiliated Hospital of Nanjing University Medical SchoolNanjing 210008China Center for Molecular Reproductive Medicine Nanjing UniversityNanjing 210008China Department of Andrology Nanjing Drum Tower HospitalThe Affiliated Hospital of Nanjing University Medical SchoolNanjing 210008China Clinical Center for Stem Cell Research The Affiliated Drum Tower Hospital of Nanjing University Medical SchoolNanjing 210008China

The present study aimed to evaluate the clinical outcomes of magnetic-activated cell sorting(MACS)in sperm preparation for male subjects with a sperm DNA fragmentation index(DFI)≥30%.A total of 86 patients who had undergone their first long-term long protocol were *** protocol involved in vitro fertilization(IVF)and intracytoplasmic sperm injection(ICSI)cycles,and the patients were divided into the MACS or control *** MACS group included sperm samples analyzed with MACS that were combined with density gradient centrifugation(DGC)and the swim-up(SU)technique(n=39),and the control group included sperm samples prepared using standard techniques(DGC and SU;n=41).No differences were noted with regard to basic clinical characteristics,number of oocytes retrieved,normal fertilization rate,cleavage rate,or transplantable embryo rate between the two groups in IVF/*** addition,the clinical pregnancy and implantation rates of the first embryo transfer cycles indicated no significant differences between the two ***,there was a tendency to improve the live birth rate(LBR)of the first embryo transfer cycle(63.2%vs 53.9%)and the cumulative LBR(79.5%vs 70.7%)in the MACS group compared with the control ***,the number of transferred embryos(mean±standard deviation[s.d.]:1.7±0.7 vs 2.3±1.6)and the transfer number of each retrieved cycle(mean±s.d.:1.2±0.5 vs 1.6±0.8)were significantly lower in the MACS group than those in the control ***,the selection of nonapoptotic spermatozoa by MACS for higher sperm DFI could improve assisted reproductive clinical outcomes.

关键词： cumulative live birth rate fertility rate intracytoplasmic sperm injection sperm DNA fragmentation index sperm DNA integrity

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Apelin-13 inhibits apoptosis and excessive autophagy in cerebral ischemia/reperfusion injury

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Neural Regeneration Research 2021年第6期16卷 1044-1051页

作者： Zi-Qi Shao Shan-Shan Dou jun-Ge Zhu Hui-Qing wang Chun-mei wang Bao-Hua Cheng Bo Bai Cheeloo College of Medicine Shandong UniversityJinanShandong ProvinceChina Neurobiology Institute Jining Medical UniversityJiningShandong ProvinceChina

Apelin-13 is a novel endogenous ligand for an angiotensin-like orphan G-protein coupled receptor,and it may be neuroprotective against cerebral ischemia ***,the precise mechanisms of the effects of apelin-13 remain to be *** investigate the effects of apelin-13 on apoptosis and autophagy in models of cerebral ischemia/reperfusion injury,a rat model was established by middle cerebral artery ***-13(50μg/kg)was injected into the right ventricle as a *** addition,an SH-SY5Y cell model was established by oxygen-glucose deprivation/reperfusion,with cells first cultured in sugar-free medium with 95%N2 and 5%CO2 for 4 hours and then cultured in a normal environment with sugar-containing medium for 5 *** SH-SY5Y cell model was treated with 10-7 M apelin-13 for 5 *** showed that apelin-13 protected against cerebral ischemia/reperfusion ***-13 treatment alleviated neuronal apoptosis by increasing the ratio of Bcl-2/Bax and significantly decreasing cleaved caspase-3 *** addition,apelin-13 significantly inhibited excessive autophagy by regulating the expression of LC3B,p62,and ***,the expression of Bcl-2 and the phosphatidylinositol-3-kinase(PI3K)/Akt/mammalian target of rapamycin(mTOR)pathway was markedly *** LY294002(20μM)and rapamycin(500 nM),which are inhibitors of the PI3K/Akt/mTOR pathway,significantly attenuated the inhibition of autophagy and apoptosis caused by *** conclusion,the findings of the present study suggest that Bcl-2 upregulation and mTOR signaling pathway activation lead to the inhibition of apoptosis and excessive *** effects are involved in apelin-13-induced neuroprotection against cerebral ischemia/reperfusion injury,both in vivo and in *** study was approved by the Animal Ethical and Welfare Committee of Jining Medical University,China(approval No.2018-JS-001)in February 2018.

关键词： central nervous system brain brain injury factor pathways apoptosis autophagy neuroprotection regeneration

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Free-Standing Membrane Liquid-State Platform for SERS-Based Determination of Norfloxacin in Environmental Samples

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Journal of Analysis and Testing 2021年第3期5卷 217-224页

作者： Jing Liu Wen Liu Sha-Na Zhou Dong-mei wang Zheng-jun Gong mei-Kun Fan Faculty of Geosciences and Environmental Engineering Southwest Jiaotong UniversityChengdu 610031China

Surface-enhanced Raman scattering(SERS)has been widely used in various fields due to high sensitivity,but it is hindered by its low ***,we explored a highly reproducible free-standing liquid-state platform(FSM)for monitoring norfloxacin(NOR)in the environmental *** optimizing the types of nanoparticles(NPs)and pH value in NOR solution,the relative standard deviation(RSD)of FSM SERS analysis can be stabilized below 10%(n≥8),and the R^(2)of the calibration curve in the range of 20μg/L-100μg/L was *** addition,the results showed that the limit of detection(LOD)(3σ/k)of NOR was 1.3μg/***,the NOR in the spiked samples was successfully quantified by FSM,and the recovery rate exceeded 95%.The proposed method has the potential for rapid analysis of drug residues in environmental samples.

关键词： SERS Norfloxacin Drug residues Environmental samples FSM

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