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Perfect Matching in k-partite k-graphs and 3-uniform HM-bipartite Hypergraphs

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Acta Mathematicae Applicatae Sinica 2020年第3期36卷 636-641页

作者： Chun-qiu fang Mei LU Department of Mathematical Sciences Tsinghua UniversityBeijing 100084China

Let H=(V,E)be an n-balanced k-partite k-graph with partition classes V1,...,*** for every legal(k-1)-tuple f contained in V\V1 and for every legal(k-1)-tuple g contained in V\Vk such that f∪g■E(H),we have d(f)+d(g)≥n+*** this paper,we prove that under this condition H must have a perfect *** result of this paper is about the perfect matching in 3-uniform hm-bipartite *** G be a 3-uniform hm-bipartite hypergraph with one of whose sides V1 has the size n,the another side V2 has size 2 *** for all the legal 2-tuple f with|f∩V1|=1 and for all the legal 2-tuple g with|g∩V1|=0,we have d(f)≥n-2 and d(g)>n/2,then G has a perfect matching.

关键词： Perfect matching k-partite k-graph hm-bipartite hypergraph

Improved Exponential Stability Criteria for Uncertain Neutral System with Nonlinear Parameter Perturbations

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International Journal of Automation and computing 2010年第4期7卷 413-418页

作者： fang qiu Bao-Tong Cui Department of Mathematics and Information Science Binzhou University Binzhou 256603 PRC College of Communications and Control Engineering Jiangnan University Wuxi 214122 PRC

This paper investigates the problem of robust exponential stability for neutral systems with time-varying delays and nonlinear perturbations. Based on a novel Lyapunov functional approach and linear matrix inequality technique, a new delay-dependent stability condition is derived. Since the model transformation and bounding techniques for cross terms are avoided, the criteria proposed in this paper are less conservative than some previous approaches by using the free-weighting matrices. One numerical example is presented to illustrate the effectiveness of the proposed results.

关键词： Neutral system time-varying delay exponential stability nonlinear perturbation linear matrix inequality (LMI)

Azomethine ylide-formation from N-phthaloylglycine by photoinduced decarboxylation:A theoretical study

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Science China Chemistry 2012年第10期55卷 2089-2094页

作者： fang qiu DING LiNa fang WeiHai College of Chemistry Beijing Normal UniversityBeijing 100875China

In this work, we report the first CASPT2//CASSCF study of the mechanism of the photodecarboxylation of N-phthaloylglycine. The charge transfer excited state S CT （ 1∏∏＊） is initially populated upon irradiation at 266 nm. As a result of a fast internal conversion to the lowest excited singlet state S CT-N （ 1∏∏＊）, this state becomes a favorable precursor state for proton transfer, which triggers decarboxylation. Actually, the excited state intramolecular proton transfer （ESIPT） and decarboxylation processes proceed in an asynchronous concerted way. The ESIPT process is accomplished in the S CT-N （ 1∏∏＊） state, but the CO 2 molecule is finally formed in the ground state via the S CT /S 0 conical intersection. Azomethine ylide is formed in the ground state as a complex with CO 2 . A barrier of ~15 kcal/mol indicates that azomethine ylide is stable in the ground state, which is consistent with the experimental findings. This work provides mechanistic details about the formation of azomethine ylide by photoreaction of N-phthaloylglycine.

关键词： N-phthaloylglycine photodecarboxylation excited state intramolecular proton transfer CASPT2//CASSCF method

Abundance and Dynamics of Soil Labile Carbon Pools Under Different Types of Forest Vegetation

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Pedosphere 2006年第4期16卷 505-511页

作者： JIANG Pei-Kun XU qiu-fang Zhejiang Forestry College Lin＇an 311300 （China）

Soil organic matter (SOM) in forest ecosystems is not only important to global carbon (C) storage but also to sustainable management of forestland with vegetation types, being a critical factor in controlling the quantity and dynamics of SOM. In this field experiment soil plots with three replicates were selected from three forest vegetation types: broadleaf, Masson pine (Pinus massoniana Lamb.), and Chinese fir (Cunninghamia lanceolata Hook.). Soil total organic C (TOC), two easily oxidizable C levels (EOC1 and EOC2, which were oxidized by 66.7 mmol L-1 K_2Cr_2O_7 at 130-140℃and 333 mmol L-1 KMnO4 at 25℃, respectively), microbial biomass C (MBC), and water-soluble organic C (WSOC) were analyzed for soil samples. Soil under the broadleaf forest stored significantly higher TOC (P (?) 0.05). Because of its significantly larger total soil C storage, the soil under the broadleaf forest usually had significantly higher levels (P (?) 0.05) of the different labile organic carbons, EOC1, EOC2, MBC, and WSOC; but when calculated as a percentage of TOC each labile C fraction of the broadleaf forest was significantly lower (P (?)0.05) than one of the other two forests. Under all the three vegetation types temperature as well as quality and season of litter input generally affected the dynamics of different organic C fractions in soils, with EOC1, EOC2, and MBC increasing closely following increase in temperature, whereas WSOC showed an opposite trend.

关键词： dynamics forest soil labile organic C total organic C vegetation system

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虚拟仪器平台下旋转机械振动应用研究

太原学院学报（自然科学版） 2025年第1期43卷 63-70页

作者：曹慧张锐英潘琦方遒安徽新闻出版职业技术学院机电信息系安徽合肥230601

利用LabVIEW软件图形化程序和可视化前面板,基于旋转机械结构和运动特点构建虚拟仪器仿真平台基本框架,设计了与真实仪器功能相当的旋转机械齿轮振动虚拟仿真研究平台。通过仿真验证,齿轮振动虚拟仿真平台能够有效采集振动信号,并对振... 详细信息

利用LabVIEW软件图形化程序和可视化前面板,基于旋转机械结构和运动特点构建虚拟仪器仿真平台基本框架,设计了与真实仪器功能相当的旋转机械齿轮振动虚拟仿真研究平台。通过仿真验证,齿轮振动虚拟仿真平台能够有效采集振动信号,并对振动信号特征进行提取和分析,测试结果与旋转机械齿轮实际振动情况一致。开发的虚拟仿真平台达到了预期功能目标,为旋转机械关键部件振动检测和故障诊断提供了可视化技术支持,降低了旋转机械故障检测成本。

关键词：齿轮振动虚拟仪器图形化程序前面板频谱分析

Peptidase Activities of Tripeptidyl Peptidase Ⅰ (TPP Ⅰ): Exopeptidase and Endopeptidase

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Chemical Research in Chinese Universities 2006年第1期22卷 65-67页

作者： DU Pei-ge AN Li-ping qiu fang-ping LU Gang Clinical Diagnosis Laboratory of Beihua University Jilin 132013 P. R. China College of Biological Engineering Changchun University of Technology Changchun 130012 P. R. China

The defect of TPP Ⅰ causes a disease, late infantile neuronal ceroid lipofuscinosis（LINCL, CLN2）. To investigate the bio-activity of tripeptidyl peptidase Ⅰ （TPP Ⅰ ） from rat kidneys, the effects of digestion of angiotensin Ⅱ （Ang Ⅱ ） and a synthetic endo-type substrate（ Gly^1-Lys-Pro^5-lie-Pro^5-Phe-Phe-Arg-Leu-Lys^10） via TPP I were ana- lyzed by HPLC and TOF-MS. The data suggest that the degradation rate of Ang I1 can reach 18. 2% by the rat TPP I and DRV（Asp-Arg-Val） can be released from N-termini of Ang Ⅱ within 16 h. In addition, the synthetic endotype substrate is cleaved at the same position between Phe6 and Phe^7. Accordingly, TPP Ⅰ shows two kinds of peptidase activities. One is a tripeptidyl peptidase activity and the other is a pepstatin insensitive carboxyl endopeptidase activity. Tripeptidyl peptidase activity and pepstatin insensitive carboxyl endopeptidase activity seem to be dual phases of one enzyme, TPP Ⅰ.

关键词： Rat TPP Ⅰ Angiotensin Ⅱ Endo-type substrate Endopeptidase activity

Pomolidomide for relapsed/refractory light chain amyloidosis after resistance to both bortezomib and daratumumab:A case report

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World Journal of Clinical Cases 2022年第34期10卷 12703-12710页

作者： Xian Li Xiao-Hong Pan qiu fang Yun Liang Department of Hematology The Second Affiliated HospitalCollege of MedicineZhejiang UniversityHangzhou 310009Zhejiang ProvinceChina Department of Cardiology The Second Affiliated HospitalCollege of MedicineZhejiang UniversityHangzhou 310009Zhejiang ProvinceChina Department of Hematology Huzhou Central HospitalAffiliated Huzhou HospitalZhejiang University School of MedicineHuzhou 313099Zhejiang ProvinceChina

BACKGROUND Immunoglobulin light chain(AL)amyloidosis is a rare disease characterized by deposition of ALs essentially in any organ or tissue,with cardiac involvement being very frequent(61%).Early diagnosis is of high importance because early initiation of treatment in AL amyloidosis may improve *** the administration of immunotherapeutic agents,in particular bortezomib and daratumumab,which have improved the outcomes of AL amyloidosis,antiplasma cell therapy remains suboptimal for some *** SUMMARY We report the case of a 55-year-old man presenting with heart failure who was diagnosed with cardiac AL amyloidosis by an endomyocardial *** experienced a short-term hematological remission with no organ response after being administered a bortezomib-daratumumab containing *** treatment was switched to pomolidomide due to pulmonary involvement and progressive pleural effusion,in which flow cytometry analysis showed abnormal plasma *** two cycles of this regimen,the pleural effusion was controlled effectively with no *** This case emphasizes the crucial role of endomyocardial biopsy in early diagnosis of cardiac amyloidosis and suggests that pomolidomide may be an effective treatment for patients with AL amyloidosis that is relapsed/refractory to both bortezomib and daratumumab.

关键词： Immunoglobulin light chain amyloidosis Relapsed/refractory Pleural effusion Endomyocardial biopsy Immunomodulatory agent Case report

Determination of an Unknown Time-dependent Heat Source from A Nonlocal Measurement by Finite Difference Method

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Acta Mathematicae Applicatae Sinica 2020年第1期36卷 151-165页

作者： Ze-wen WANG Zhou-sheng RUAN He-lu HUANG Shu-fang qiu School of Science East China University of TechnologyNanchang 330013China Institute of Science and Engineering Computing East China University of TechnologyNanchang 330013China

In this paper,we consider an inverse time-dependent source problem of heat conduction ***,the ill-posedness and conditional stability of this inverse source problem is ***,a finite difference inversion method is proposed for reconstructing the time-dependent source from a nonlocal *** existence and uniqueness of the finite difference inverse solutions are rigorously analyzed,and the convergence is *** with the mollification method,the proposed finite difference inversion method can obtain more stable reconstructions from the nonlocal data with ***,numerical examples are given to illustrate the efficiency and convergence of the proposed finite difference inversion method.

关键词： inverse source problem ill-posed problem finite difference heat equation mollification

Microbial Development in Soils Under Intensively Managed Bamboo (Phyllostachys praecox) Stands

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Pedosphere 2005年第1期15卷 33-40页

作者： XUqiu-fang JIANGPei-Kun ZhejiangForestryCollege Lin＇an311300China

Phyllostachys praecox C. D. Chu et C. S. Chao, a favored bamboo shoot species, has been widely planted in recent years. Four stands with different historical management practices were selected for this study to understand the evolution of soil microbial ecology by determining the effects of a new mulching and heavy fertilization practice on soil quality using microbiological parameters. Compared with the traditional practice (index 1), microbial biomass carbon (MBC) and soil microbial respiration carbon (MRC) with the new management practice significantly decreased (P ＜ 0.01 and P ＜ 0.05,respectively) with 1-2 years of mulching (index 2) and then for continued mulching significantly increased (P ＜ 0.05). The ratios of MBC/TOC (total organic carbon) and MRC/TOC also significantly diminished (P ＜ 0.05) with mulching. The average well color development (AWCD) and Shannon index decreased with mulching time, and the significant decrease(P ＜ 0.05) in Shannon index occurred from index 2 to index 3. The results from a principal components analysis (PCA)showed that the scores of the first principal component for indexes 1 and 2 were significantly larger (P ＜ 0.05) than soils mulched 3-4 years or 5-6 years. Also, the second principal component scores for index 1 were larger than those for index 2, suggesting that the ability of soil microorganisms to utilize soil carbon was decreasing with longer use of the new management practice and causing a deterioration of soil biological properties.

关键词： microbial biomass carbon microbial functional diversity microbial respiration carbon Phyllostachys praecox soil