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微量Co^(2+)-Si^(4+)取代对多晶石榴石铁氧体材料旋矩磁性能的影响

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磁性材料及器件 2024年第5期55卷 12-15页

作者：王文鑫翁兆平徐茂忠南京国睿微波器件有限公司江苏南京210061

采用传统陶瓷工艺制备了多晶石榴石铁氧体,研究了微量Co^(2+)-Si^(4+)联合取代对GdCaSnV-YIG、GdCaZrV-YIG、GdCaInV-YIG和GdAl-YIG材料旋矩磁性能的影响。结果表明,Co^(2+)-Si^(4+)联合取代GdAl-YIG可使其矫顽力显著增高,而Co^(2+)-Si^(4+)取代GdCaSnV-YIG、GdCaZrV-YIG和GdCaInV-YIG,可调节其矫顽力和剩磁比。当Co^(2+)-Si^(4+)取代量为0.015时得到GdCaSnV-YIG的矫顽力为0.17 Oe,取代量为0.025时得到GdCaZrV-YIG的矫顽力为0.23 Oe,取代量大于等于0.035时三者的剩磁比均能达到0.79或以上。

关键词：石榴石铁氧体 Co^(2+)-Si^(4+)取代旋矩磁材料剩磁比

Spatiotemporal Changes in Soil Nutrients:A Case Study in Taihu Region of China

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Journal of Integrative Agriculture 2014年第1期13卷 187-194页

作者： LIU Lei-lei ZHU Yan LIU Xiao-jun CAO Wei-xing xu mao WANG xu-kui WANG En-li National Engineering and Technology Center for Information Agriculture/Jiangsu Key Laboratory for Information Agriculture/Nanjing Agricultural University Soil and Fertilizer Station of Jiangsu Agricultural Department CSRIO Sustainable Agricultural Flagship CSIRO Land and Water

The accurate assessment of the spatiotemporal changes in soil nutrients influenced by agricultural production provides the basis for development of management strategies to maintain soil fertility and balance soil nutrients. In this paper, we combined spatial measurements from 2 157 soil samples and geostatistical analysis to assess the spatiotemporal changes in soil organic carbon （SOC）, total nitrogen （TN）, available phosphorus （AP） and available potassium content （AK） from the first soil survey （in the 1980s） to the second soil survey （in the 2000s） in the Taihu region of Jiangsu Province in China. The results showed that average soil nutrients in three soil types all exhibited the increased levels in the 2000s （except for AK in the yellow brown soil）. The standard deviation of soil nutrient contents increased （except for TN in the paddy soil）. Agricultural production in the 20 years led to increases in SOC, TN, AP and AK by 74, 82, 89 and 65%, respectively, of the Taihu areas analyzed. From the 1980s to 2000s all the nugget/sill ratios of soil nutrients indices were between 25 and 75% （except for AK in the yellow brown soil in the 2000s）, indicating moderate spatial dependence. The ratio of AP in the yellow brown soil in the 2000s was 88.74%, showing weak spatial dependence. The spatial correlation range values for SOC, TN, AP and AK in the 2000s all decreased. The main areas showing declines in SOC, TN and AP were in the northwest. For AK, the main region with declining levels was in the east and middle of western areas. Apparently, the increase in soil nutrients in the Taihu region can be mainly attributed to the large increase in fertilizer inputs, change in crop systems and enhanced residues management since the 1980s. Future emphasis should be placed on avoiding excess fertilizer inputs and balancing the effects of the fertilizers in soils.

关键词： soil fertility spatiotemporal variability soil organic carbon total nitrogen phosphorus potassium

Synthesis of bacillamide 3 and its analogue

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Chinese Chemical Letters 2009年第10期20卷 1195-1197页

作者： Duo Li Hai Shen Yang Qing Cui Shen Jie mao Xiao Hua xu State Key Laboratory of Elemento-Organic Chemistry Nankai University Tlanjin 300071 China

The bacillamide 1 is a new algaecide from the marine bacterium Bacillus sp. SY-1. Its analogues bacillamide 3 and alkaloid 4 were firstly synthesized effectively from D-alanine. The key step was a coupling reaction via the mixed anhydride. All structures were confirmed by IH NMR and 13C NMR. The final compounds were confirmed by 1H NMR, 13C NMR and HRMS and the results are consistent with the reported natural products.

关键词： Bacillamide Thiazole rings Tryptamide Synthesis

Infliximab trough level combined with inflammatory biomarkers predict long-term endoscopic outcomes in Crohn’s disease under infliximab therapy

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World Journal of Gastroenterology 2022年第23期28卷 2582-2596页

作者： Wan-Ting Cao Rong Huang Shan Liu Yi-Hong Fan mao-Sheng xu Yi xu Hui Ni Department of Gastroenterology The First Affiliated Hospital of Zhejiang Chinese Medical UniversityZhejiang Provincial Key Laboratory of Gastrointestinal Diseases PathophysiologyHangzhou 310006Zhejiang ProvinceChina Department of Clinical Evaluation Center The First Affiliated Hospital of Zhejiang Chinese Medical UniversityHangzhou 310006Zhejiang ProvinceChina Department of Radiology The First Affiliated Hospital of Zhejiang Chinese Medical UniversityHangzhou 310006Zhejiang ProvinceChina Department of Nursing The Second Affiliated Hospital of Zhejiang University School of MedicineHangzhou 310006Zhejiang ProvinceChina

BACKGROUND Infliximab trough level(ITL)severely affects therapeutic outcomes of Crohn’s disease(CD)patients under infliximab(IFX).Recently,frontier research has focused on identifying ITL based on different therapeutic *** previous studies have elaborated clinical value of ITL monitoring on short-term outcomes in CD patients during therapy,studies contraposing the predictive value of ITL on long-term endoscopic outcomes in CD patients are still scarce domestically and *** To explore the predictive value of ITL in combination with inflammatory biomarkers on long-term endoscopic outcomes in CD with clinical remission during IFX maintenance *** CD patients with endoscopic remission under long-term IFX maintenance therapy in the First Affiliated Hospital of Zhejiang Chinese Medicine University from January 2012 to December 2020 were *** and inflammatory biomarkers were continuously monitored during the *** Step I study was conducted from weeks 14 to 54 of IFX *** Step II study was conducted from weeks 54 to 108 of IFX *** outcomes were defined as endoscopic activity(Crohn’s disease endoscopic index of severity score>2 points or Rutgeerts score>i1)and endoscopic remission(Crohn’s disease endoscopic index of severity score≤2 points or Rutgeerts≤i1).Endoscopic relapse free survival was defined as endoscopic remission at the beginning of the study stage and maintaining endoscopic remission during the study *** At week 14,low ITL[odds ratio(OR)=0.666,95%confidence interval(CI):0.514-0.862,P238μg/g

关键词： Infliximab trough level C-reactive protein Fecal calprotectin Crohn’s disease Clinical remission Long-term endoscopic outcomes

Community-detection-based Approaches for Distribution Network Partition

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CSEE Journal of Power and Energy Systems 2024年第5期10卷 1965-1976页

作者： Mingming mao Zaijun Wu Dongliang xu Junjun xu Qinran Hu School of Electrical Engineering Southeast UniversityNanjing 210096China State Grid Shanghai Municipal Electric Power Company Pudong Power Supply Company Shanghai 200122China College of Automation and College of Artificial Intelligence Nanjing University of Posts and TelecommunicationsNanjing 210023China

A rational partition is the key prerequisite for the application of distributed algorithms in distribution *** paper proposes community-detection-based approaches to a distribution network partition,including a non-overlapping partition and a border-node partitioning ***,a novel electrical distance is defined to quantify the coupling relationships between buses and it is further used as the edge weight in a transformed equivalent ***,a vertex/link partition community detection approach is applied to over-partition the network into high intra-cohesive and low inter-coupled *** this,a greedy algorithm and a tabu search method are combined to merge these subregions into target numbers according to the scale similarity *** proposed approaches take the influence of three-phase imbalance into consideration and they are decoupled from the power ***,the approaches are tested on an IEEE 123-bus distribution system and the results verify the effectiveness and the credibility of our proposed methods.

关键词： Community detection distribution network partition three-phase imbalance

Can whole steps of grain production be outsourced? Empirical analysis based on the three provinces of Jiangsu,Jilin,and Sichuan in China

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Journal of Integrative Agriculture 2024年第1期23卷 336-347页

作者： Jiacheng Liu Shengzhi mao Qiufen Zheng Zhigang xu School of Finance and Taxation Nanjing University of Finance and EconomicsJiangsu 210023China School of Economics Southwestern University of Finance and EconomicsSichuan 611130China School of Economics and Management Nanjing Agricultural UniversityJiangsu 210095China

Certain outsourcing services for agricultural management in China,such as pest control in grain production,have experienced prolonged sluggishness,contrasting with the relatively high level of outsourcing services observed in harvesting,land preparation,and *** study examines the feasibility of implementing whole-step outsourcing in grain production by conducting a case study of rice and maize production in Jiangsu,Jilin,and Sichuan provinces in *** provision of outsourcing services hinges on two essential conditions:technological advancements fostering specialized production and economies of scale,coupled with a market size sufficient to realize the aforementioned potential economies of *** results showed that outsourcing pest control or harvesting services had varying economies of *** outsourcing services in pest control were less common than in harvesting services,and their marginal growth space of the economies of scale with technological change was also *** by the operational characteristics of pest control itself,the market scale of its professional services is ***,achieving the whole-step outsourcing of grain production necessitates not only technological innovation but also effective policy interventions to overcome the constraints of market *** interventions include(1)optimizing crop layouts between planning regions and reducing land fragmentation and(2)supplying timely and effective inter-regional agricultural information for service providers aided by information technology.

关键词： outsourcing services economy of scale technical conditions market scale

Optimized numerical density functional theory calculation of rotationally symmetric jellium model systems

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Chinese Physics B 2024年第10期33卷 349-355页

作者： Guangdi Zhang Li mao Hongxing xu School of Physics and Technology Wuhan UniversityWuhan 430070China Wuhan Institute of Quantum Technology Wuhan 430205China School of Microelectronics Wuhan UniversityWuhan 430072China Henan Academy of Sciences Zhengzhou 450046China

In real space density functional theory calculations,the effective potential depends on the electron density,requiring self-consistent iterations,and numerous integrals at each step,making the process *** our research,we propose an optimization method to expedite density functional theory(DFT)calculations for systems with large aspect ratios,such as metallic nanorods,nanowires,or scanning tunneling microscope *** method focuses on employing basis set to expand the electron density,Coulomb potential,and exchange-correlation *** precomputing integrals and caching redundant results,this expansion streamlines the integration process,significantly accelerating DFT *** a case study,we have applied this optimization to metallic nanorod systems of various radii and lengths,obtaining corresponding ground-state electron densities and potentials.

关键词： density functional theory basis set integrals precomputation nanorod

Interaction Between Baicalein and Amyloid-β Fibrils Studied by Fluorescence Spectroscopy

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Chemical Research in Chinese Universities 2013年第1期29卷 20-25页

作者： SONG Sheng-mei WANG Yong-xiang XIONG Li-min QU Ling-bo xu mao-tian Department of Chemistry Zhengzhou University Zhengzhou 450052 P. R. China Key Laboratory Cultivation Base of Nanobiological Analytical Chemistry ofHenan Province College of Chemistry and Chemical Engineering Shangqiu Normal University Shangqiu 476000 P. R.China

The interaction between baicalein and amyloid-β（Aβ） polypeptide was investigated by fluorescence and UV-Vis absorbance spectroscopy. The absence of the characteristic peak of tyrosinate（Tyr） in the absorption spectra of Afl-baicalein complexes provided evidence that the sole Tyr residue in Aβis not bound to baicalein, but remains close to it. The intrinsic fluorescence of Tyr residues in Aβ1-42 aggregates was quenched strongly by the excited-state ionization of baicalein. In this complex the hydroxyl group was not ionized, but to ionize immediately upon excitation. Absorbance, fluorescence and synchronous spectroscopies show that the formation of Schiff base between the quinone of baicalein and the lysine（Lys） side chains ofAβ1-42 is another major reason in the depolymerization of Aβ1-42 aggregates by baicalein. It is desirable that our research would offer some valuable reference for the application of flavonoid derivants in Alzheimer＇s disease（AD） treatment.

关键词： Amyloid-β peptide Baicalein Depolymerization Molecular mechanism Fluorescence spectroscopy

Gasflow style level posture sensor and angular velocity gyroscope assembled inertial sensor

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Progress in Natural Science:Materials International 2007年第8期17卷 971-978页

作者： Zhang Fuxue~(**) mao xu (Research Centre of Sensor Technology,Beijing Information Technology Institute,Beijing 100101,China) Research Centre of Sensor Technology Beijing Information Technology Institute Beijing 100101 China

The compensational loop consisting of a gasflow style angular velocity gyroscope and gasflow level posture sensor is pro- posed to improve the signal of gasflow style *** compensational loop could remove acceleration interfere from the signal of *** assembled gasflow type inertial sensor not only measures static state angular,but also restrains the acceleration which interferes the output signal of level posture sensor in dynamic ***,the precision of outputs signal increases ***,the output sig- nal includes the angle velocity signal.

关键词： gasflow style inertia sensor