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Chinese Chemical Letters 1993年第5期4卷 381-384页

作者： run hua deng Ai Qiao MI Yao Zhong JIANG Chengdu Institute of Organic Chemistry, Academia Sinica, Chengdu 610015

The rapid alkylation of methyl N-benzylidene glycinate with halides under microwave irradiation using solid-liquid phase transfer condition without solvent has been achieved wilhin only one minute. After hydrolysis of... 详细信息

关键词： SYN THE SYNTHESIS OF AMINO ACIDS VIA ALICYLATION OF ALDIMINE UNDER MICROWAVE IRRADIATION SOLID-LIQUID PHASE TRANSFER CATALYTIC SYN THESIS VIA

Global trend of review articles focused on cardiopulmonary bypass:Perspectives from bibliometrics

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World Journal of Methodology 2025年第2期15卷 166-173页

作者： Lei deng Rui Zhou Xian-Jie Zhang Yan-hua Peng Department of Gastroenterology Deyang People’s HospitalDeyang 618000Sichuan ProvinceChina Department of Anesthesiology and Perioperative Medicine Shanghai Fourth People's HospitalSchool of MedicineTongji UniversityShanghai 200434China Department of Anesthesiology Deyang People’s HospitalDeyang 618000Sichuan ProvinceChina

BACKGROUND Cardiopulmonary bypass(CPB)is a life-support technology widely used in *** articles reflect research advances in a certain topic or field within a certain period of *** To perform a bibliometric analysis of the review articles that focused on CPB for cardiovascular *** This study was based on a bibliometric *** were acquired from the Web of Science and basic bibliometric parameters were analyzed and visualized using VOSviewer and *** We identified 141 review articles on ***,the number of publications increased,and most of them were published in the 2010s(n=57,40.4%)and the 2020s(n=45,31.9%).There were 113(80.1%)narrative review articles,21(14.9%)meta-analysis studies and 7(5.0%)systematic review *** United States(n=25,17.7%)and China(n=21,14.9%)were the leading countries in terms of publication *** articles were published in 98 different *** Journal of Cardiothoracic and Vascular Anesthesia(n=14,10.0%)and Perfusion-United Kingdom(n=11,7.8%)were preferred by the *** high-frequency keywords included inflammatory response,children,acute kidney injury,meta-analysis and off-pump,except for CPB and cardiac *** response had the closest relationship with CPB during cardiac *** complications of CPB,including inflammatory response,kidney injury and ischemia,caught lots of *** The rapid increase of review papers shows that the research on CPB in cardiac surgery is increasingly being emphasized by scholars and clinical staff ***-analysis has been widely conducted to analyze clinical controversies and further guide clinical *** to improving the outcomes of patients undergoing cardiac surgery with CPB are the hot spots in this field.

关键词： Cardiopulmonary bypass Review article Bibliometric analysis Cardiac surgery Hot spots

Infinitely Many Solutions to a Class of p-Laplace Equations

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Acta Mathematicae Applicatae Sinica 2019年第4期35卷 770-779页

作者： Yi-hua deng College of Mathematics and Statistics Hengyang Normal University

In this paper, we study a class of p-Laplace equations. Using variational methods, we prove that there are two solutions and one of these solutions is nonnegative. Using recurrence method, we prove that there are infi... 详细信息

关键词： p-Laplace equation variational methods infinitely many solutions nonnegative solution

Analysis of the anti-T2DM components in dichloromethane fraction of Schisandra sphenanthera and its mechanism

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Traditional Medicine Research 2025年第1期10卷 27-43页

作者： Shi-Bo Feng Hai-Hui Jiang Hui-Li Kang Yi Jiang hua-Wei Zhang Xiao-Mei Song Yu-Ze Li Wen-Li huang Dong-Dong Zhang Chong deng School of Pharmacy Shaanxi University of Chinese MedicineXianyang 712046China School of Pharmacy and Shaanxi Qinling Application Development and Engineering Center of Chinese Herbal Medicine Shaanxi University of Chinese MedicineXianyang 712046China Key Laboratory for Research and Development of“Qin Medicine”of Shaanxi Administration of Traditional Chinese Medicine Xianyang 712046China Shaanxi Key Laboratory of Research and Application of“Taibai Qi Yao” Xianyang 712046China

Background:The type 2 diabetes mellitus(T2DM)pharmacodynamic study of various parts of Schisandra sphenanthera was conducted in the previous stage,and it was found that dichloromethane extracted part(SDP)had a significant hypoglycemic ***,the components of SDP were analyzed,and the specific mechanism of its anti-T2DM was ***:We used a high-fat,high-sugar diet in combination with streptozotocin to induce a T2DM rat model,and the model rats were divided into two groups according to body weight and blood ***,oral glucose tolerance test,fasting blood glucose,low density lipoprotein cholesterol,superoxide dismutase,insulin,glycated hemoglobin,total cholesterol,nonesterified free fatty acids,alanine aminotransferase,high-density lipoprotein cholesterol,aspartate aminotransferase,malondialdehyde,and glutathione peroxidase were measured,organ indices were calculated,and pathological sections of pancreas and liver were *** 16S rRNA V3–V4 region of intestinal flora was sequenced to explore the effect of SDP on biochemical indicators and intestinal *** on the above indicators,the anti-T2DM mechanism of SDP in Schisandra sphenanthera was ***:After six weeks of administration,the biochemical indices of diabetic rats were diminished compared to the control *** SDP could significantly increase the gut microbialα-diversity index,resulting in significant changes in the flora of T2DM rats,with increased richness and diversity,reduced harmful flora,and significantly back-regulated the levels of acetic acid,propionic acid,and butyric ***:SDP can improve the symptoms associated with elevated blood glucose,dyslipidemia,elevated fasting insulin levels,and damaged glucose tolerance in *** against T2DM may be through the control of intestinal flora to normalize and exert anti-diabetic effect;its main active components may be lignans and terpenoids.

关键词： Schisandra sphenanthera T2DM intestinal flora HPLC

Comparison of Two Variances Under Inequality Constraints by Using Empirical Likelihood Method

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Acta Mathematicae Applicatae Sinica 2013年第4期29卷 809-822页

作者： Guo-hua deng School of Statistics Jiangxi University of Finance and Economics

In this article, the empirical likelihood introduced by Owen Biometrika, 75, 237-249 （1988） is applied to test the variances of two populations under inequality constraints on the parameter space. One reason that we do the research is because many literatures in this area are limited to testing the mean of one population or means of more than one populations; the other but much more important reason is： even if two or more populations are considered, the parameter space is always without constraint. In reality, parameter space with some kind of constraints can be met everywhere. Nuisance parameter is unavoidable in this case and makes the estimators unstable. Therefore the analysis on it becomes rather complicated. We focus our work on the relatively complicated testing issue over two variances under inequality constraints, leaving the issue over two means to be its simple ratiocination. We prove that the limiting distribution of the empirical likelihood ratio test statistic is either a single chi-square distribution or the mixture of two equally weighted chi-square distributions.

关键词： chi-bar square empirical likelihood inequality constraint least favorable set

Evapotranspiration and humidity variations in response to land cover conversions in the Three Gorges Reservoir Region

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Journal of Mountain Science 2018年第3期15卷 590-605页

作者： deng hua SHAO Jing-an Chongqing Youth Vocational & Technical College Chongqing 400712 China College of Geography and Tourism Chongqing Normal University Chongqing 401331 China Key Laboratory of Surface Process and Environment Remote Sensing in the Three Gorges Reservoir Area Chongqing 401331 China

A new land cover classification system was established for the Three Gorges Reservoir Region(TGRR) after considering the continuity of inundation and the natural characteristics of land cover. The potential evapotranspiration(PET) was predicted using a modified Penman-Monteith(P-M) model. The region's ratio of precipitation to evapotranspiration was calculated as the humidity index(HI). The data obtained was used to analyze climatic responses to land cover conversions from the perspectives of evapotranspiration and humidity variations. The results show that, from 1997 to 2009, the average annual PET increased in the early years and decreased later. In terms of overall spatial distribution, a significant reciprocal relationship appeared between annual PET and annual HI. In 1997,the annual PET was higher in the lower reaches than in the upper reaches of the TGRR, but the areas with high PET shifted substantially westward by 2003. The annual PET continued to increase in 2006, but the areas with high PET shrank by 2009. In contrast, the annual HI showed varying degrees of localized spatial variability. Over the three periods, the dominantforms of land cover conversions occurred from evergreen cover to seasonal green cover, from seasonal green cover to evergreen cover, and from seasonal green cover to seasonally inundated areas, respectively. These accounted for 48.0%, 38.4%, and 23.8% of the total areas of converted land covers in the three periods, respectively. During the period between 1997 and 2003, the main forms of land cover conversions resulted in both positive and negative growths in the average annual PET, while all of them pushed down the average annual HI. From 2003 to 2006, the reservoir region experienced neither a decrease in the annual PET nor an increase in the annual HI. The period between 2006 and 2009 saw a consistent downward trend in the annual PET and a consistent upward trend in the annual HI.

关键词： Land cover Evapotranspiration Humidity variations Response Three Gorges Reservoir Region

Identification and Guaranteed Performance Control of Hammerstein Systems over Wireless Channels

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International Journal of Automation and computing 2016年第2期13卷 125-132页

作者： Wei-hua deng Kang Li Jing deng College of Electrical Engineering Shanghai University of Electric Power School of Electronics Electrical Engineering and Computer ScienceQueen's University

The problems of identification and stabilization of a class of Hammerstein systems over a wireless network are investigated in this paper. A new approach for the proof of iterative identification is presented first. Then a guaranteed performance controller is designed to stabilize the system. The effectiveness of the proposed approach is demonstrated by numerical examples.

关键词： Identification guaranteed performance control model-based approach wireless network stochastic delay.

Humanoid Design of Mechanical Fingers Using a Motion Coupling and Shape-adaptive Linkage Mechanism

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Journal of Bionic Engineering 2018年第1期15卷 94-105页

作者： Yi Zhang hua deng Guoliang Zhong College of Mechanical & Electrical Engineering Changsha University Changsha 410022 China State Key Laboratory of High-Performance Complex Manufacturing Central South University Changsha 410083 China School of Mechanical and Electrical Engineering Central South University Changsha 410083 China

This paper proposes a novel underactuated finger mechanism based on a motion coupling and shape-adaptive linkage design that combines anthropomorphic free motion and adaptive grasping. The proposed three-joint finger mechanism with one active Degree of Freedom （DOF） consists of a five-linkage meehanism in the proximal phalanx and a mechanism comprising two parallel planar four-bar linkages in the middle phalanx. The respective mechanism allows the simultaneously rotation of their corresponding pha- langes in the plane before making contact with an object, and can fully envelop an object, even if certain phalanges are blocked. The duel parallel four-bar linkage mechanism is adopted to improve the grasping capacity of the distal phalanx. An optimal design of the finger is presented according to anthropomorphic phalanx trajectories and maximized grasping forces obtained with consideration for the angular velocity relationships of the three phalanges and their force transmission performances. The functionality of the proposed finger mechanism is verified through multiple simulations and grasping experiments using a prototype finger.

关键词： humanoid finger underactuated mechanism linkage mechanism adaptive grasp

Stability of stochastic neural networks with Markovian jumping parameters

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Journal of Systems Engineering and Electronics 2009年第3期20卷 613-618页

作者： hua Mingang deng Feiqi Peng Yunjian Coll. of Automation Science and Engineering South China Univ. of Technology Guangzhou 510640 P. R. China

The global asymptotical stability for a class of stochastic delayed neural networks （SDNNs） with Maxkovian jumping parameters is considered. By applying Lyapunov functional method and Ito＇s differential rule, new delay-dependent stability conditions are derived. All results are expressed in terms of linear matrix inequality （LMI）, and a numerical example is presented to illustrate the correctness and less conservativeness of the proposed method.

关键词： stochastic neural networks global asymptotical stability linear matrix inequality Markovian jumping parameters.

Landform Classification for Community Siting: A case Study in Quxian County, China

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Journal of Mountain Science 2015年第4期12卷 1025-1037页

作者： ZHAO Ke deng Zhao-hua Faculty of Architecture and Urban Planning Chongqing University Key Laboratory of New Technology for Construction of Cities in Mountain Area Chongqing University School of Architecture South China University of Technology State Key Laboratory of Subtropical Building Science South China University of Technology

This study is to explore a suitable method to classify landform, in order to support the decision making for community siting in mountainous *** first proposes the landform classification for community siting(LCCS) method with detailed discussions on its rationality and the chosen *** method is then tested and verified in Quxian *** LCCS method entails twograde parameters, which uses relative relief as the first grading parameter, slope as the second, followed by a synthesis process to form a suitable landform classification *** applying the LCCS method in Quxian county, the result shows that its use of watershed to identify geomorphometric units, and its use of the altitude datum concept, can effectively classify landform according to the local cultural traditions, and the economic and environmental *** verification result shows that comparing to the conventional methods, the LCCS method respects to people's daily experience due to its bottom-up *** not only help to minimize the disturbance to the nature when choosing locations for community development, but also helps to prepare more precise land management policies,which maximizes agricultural production and minimizes terrain transformation.

关键词： Landform classification Community siting Relative relief Slope Mountainous areas China