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THE ∂∂^(-)-BOCHNER FORMULAS FOR HOLOMORPHIC MAPPINGS BETWEEN HERMITIAN MANIFOLDS AND THEIR APPLICATIONS

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Acta Mathematica Scientia 2021年第5期41卷 1659-1669页

作者： kai tang College of Mathematics and Computer Science Zhejiang Normal UniversityJinhua 321004China

In this paper,we derive some∂∂^(-)-Bochner formulas for holomorphic maps between Hermitian *** applications,we prove some Schwarz lemma type estimates,and some rigidity and degeneracy *** instance,we show that there is no non-constant holomorphic map from a compact Hermitian manifold with positive(***-negative)ℓ-second Ricci curvature to a Hermitian manifold with non-positive(***)real bisectional *** theorems generalize the results[5,6]proved recently by *** on Kähler manifolds to Hermitian *** also derive an integral inequality for a holomorphic map between Hermitian manifolds.

关键词： Schwarz lemmas Bochner formulas holomorphic map Hermitian manifolds ℓ-second Ricci curvature

QSAR Studies on PCDD/Fs by Kernel PLS

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Chemical Research in Chinese Universities 2008年第5期24卷 541-545页

作者： tang kai-lin LI Tong-hua CHEN kai Department of Chemistry Tongji University Shanghai 200092 P. R. China

QSPR models of PCDD/Fs were generated by means of kernel partial least squares. The molecular distance-edge vector method was used as descriptors to get model I for predicting PCDD/Fs retention behavior. The chlorinated positions were also used and model II was obtained. In studied cases, the predictive ability of the KPLS model is comparable or superior to those of PLS and ANN. The results indicate that KPLS can be used as an alternative powerful modeling tool for QSPR studies.

关键词： QSPR modeling Kernel partial least squares PCDD/Fs

排土物料对某建材排土场边坡稳定性的敏感度分析

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现代矿业 2025年第1期41卷 170-173页

作者：唐恺任菲张圣通中钢集团马鞍山矿山研究总院股份有限公司安徽省马鞍山市243000 金属矿山安全与健康国家重点实验室华唯金属矿产资源高效循环利用国家工程研究中心有限公司济南轨道交通集团资源开发有限公司汉宸国际工程设计集团有限公司

排土物料是影响排土场稳定性的最直接的因素,由于力学试验的随机性,很难确定排土物料力学性质中影响稳定性的最主要因素。以某排土场为研究背景,基于地质勘察资料,选取3个典型剖面,对排土物料力学性质中黏聚力、内摩擦角和容重3种敏感... 详细信息

排土物料是影响排土场稳定性的最直接的因素,由于力学试验的随机性,很难确定排土物料力学性质中影响稳定性的最主要因素。以某排土场为研究背景,基于地质勘察资料,选取3个典型剖面,对排土物料力学性质中黏聚力、内摩擦角和容重3种敏感因素进行敏感度模拟分析。结果表明,内摩擦角敏感度最高,黏聚力其次,容重的敏感度最低,对排土场边坡稳定性的影响可忽略。研究结果对排土场的初始设计、后续建设和运行具有一定的指导意义。

关键词：矿山排土场敏感度分析边坡稳定性

Genome-wide analysis and expression profiling of the phospholipase D gene family in Gossypium arboreum

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Science China(Life Sciences) 2016年第2期59卷 130-141页

作者： kai tang Chunjuan DONG Jinyuan LIU Laboratory of Plant Molecular Biology Center for Plant Biology School of Life Sciences Tsinghua University Institute of Vegetables and Flowers Chinese Academy of Agricultural Sciences

The plant phospholipase D （PLD） plays versatile functions in multiple aspects of plant growth, development, and stress re- sponses. However, until now, our knowledge concerning the PLD gene family members and their expression patterns in cotton has been limited. In this study, we performed for the first time the genome-wide analysis and expression profiling of PLD gene family in Gossypium arboretum, and finally, a total of 19 non-redundant PLD genes （GaPLDs） were identified. Based on the phylogenetic analysis, they were divided into six well-supported clades （tx, 13/？, 8, ~, ~ and q~）. Most of the GaPLD genes with- in the same clade showed the similar exon-intron organization and highly conserved motif structures. Additionally, the chro- mosomal distribution pattern revealed that GaPLD genes were unevenly distributed across 10 of the 13 cotton chromosomes. Segmental duplication is the major contributor to the expansion of GaPLD gene family and estimated to have occurred from 19.61 to 20.44 million years ago when a recent large-scale genome duplication occurred in cotton. Moreover, the expression profiling provides the functional divergence of GaPLD genes in cotton and provides some new light on the molecular mecha- nisms of GaPLDcd and GaPLD62 in fiber development.

关键词： Gossypium arboreum phospholipase D gene family expression patterns fiber development

Influence of the heating rate on the critical Marangoni number of oscillatory thermocapillary convection in the floating half zone

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Science China(Physics,Mechanics & Astronomy) 2012年第1期55卷 102-107页

作者： LI kai tang ZeMei HU WenRui National Microgravity Laboratory Institute of Mechanics Chinese Academy of Sciences Beijing 100190 China

In the present study, numerical simulations were conducted on thermocapillary convection in floating half zones of 5 cSt silicone oil of different scales in comparison with the experimental studies in the microgravity conditions. The effect of heating rate on the marginal instability boundaries is indicated as a possible explanation for the significant quantitative discrepancies between the experimental results in the terrestrial conditions and in the microgravity conditions.

关键词： thermocapillary convection flow instability finite element methods

Optimal interface surface determination for multi-axis freeform surface machining with both roughing and finishing

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Chinese Journal of Aeronautics 2018年第2期31卷 370-384页

作者： Lufeng CHEN Pengcheng HU Ming LUO kai tang Hong Kong University of Science and Technology Hong Kong China National Numerical Control System Engineering Research Center Huazhong University of Science and Technology Wuhan 430074 China Key Laboratory of Contemporary Design and Integrated Manufacturing Technology Ministory of EducationNorthwestern Polytechnical University Xi'an 710072 China

In the current practice of multi-axis machining of freeform surfaces, the interface surface between the roughing and finishing process is simply an offset surface of the nominal surface. While there have already been attempts at minimizing the machining time by considering the kinematic capacities of the machine tool and/or the physical constraints such as the cutting force, they all target independently at either the finishing or the roughing process alone and are based on the simple premise of an offset interface surface. Conceivably, since the total machining time should count that of both roughing and finishing process and both of them crucially depend on the interface surface, it is natural to ask if, under the same kinematic capacities and the same physical constraints, there is a nontrivial interface surface whose corresponding total machining time will be the minimum among all the possible（infinite） choices of interface surfaces, and this is the motivation behind the work of this paper. Specifically, with respect to the specific type of iso-planar milling for both roughing and finishing, we present a practical algorithm for determining such an optimal interface surface for an arbitrary freeform surface. While the algorithm is proposed for iso-planar milling, it can be easily adapted to other types of milling strategy such as contour milling. Both computer simulation and physical cutting experiments of the proposed method have convincingly demonstrated its advantages over the traditional simple offset method.

关键词： Feed rate Finishing and roughing process Interface surface lso-planar tool path Physical constraints

Inflammation,lipid metabolism dysfunction,and hypertension:Active research fields in atherosclerosis-related cardiovascular disease in China

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Science China(Life Sciences) 2011年第10期54卷 976-979页

作者： YIN kai tang ChaoKe Institute of Cardiovascular Research Key LaboratoryJbr Atherosclerology of Hunan Province Life Science Research Center University of South China Hengyang 421001 China

Atherosclerosis-related cardiovascular disease is one of the leading causes of death in China [1]. With advances in our understanding of the molecular mechanisms of atherosclerosis vascular inflammation, lipid metabolism dysfunction, and hypertension are regarded as the main pathogenetic pathways of both early atherogenesis and advanced plaque rupture [2,3]. Currently, much attention is being paid to the control of these pathways, which offers the potential for development of novel therapeutic approaches in the treatment of cardiovascular disease in China.

关键词：动脉粥样硬化心血管疾病高血压功能障碍脂质代谢中国炎症分子机制

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城市地下空间集约化开发模式探析

建筑科技 2025年第1期9卷 9-13页

作者：唐凯蒋应红沈雷洪上海市城市建设设计研究总院(集团)有限公司上海200125

随着城市发展与城市核心区土地资源有限性的矛盾日益凸显,地下空间的集约化开发利用逐渐成为提升城市核心区发展品质的有效途径。借鉴国内外的先进经验和成功案例,结合我国的国情与实际情况,归纳出科学、合理、创新的城市地下空间集约... 详细信息

随着城市发展与城市核心区土地资源有限性的矛盾日益凸显,地下空间的集约化开发利用逐渐成为提升城市核心区发展品质的有效途径。借鉴国内外的先进经验和成功案例,结合我国的国情与实际情况,归纳出科学、合理、创新的城市地下空间集约化开发模式,分析其特点与适用场景,展望城市地下空间集约化开发未来的发展方向,旨在为城市地下空间的规划与利用提供可行性与可持续性的解决方案。

关键词：地下空间开发模式集约化城市更新整体开发

Molecular Characterization of a Cytosolic Malate Dehydrogenase Gene（GhcMDH1） from Cotton

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Chemical Research in Chinese Universities 2017年第1期33卷 87-93页

作者： IMRAN Muhammad ZHANG Bing tang kai LIU Jinyuan Laboratory of Plant Molecular Biology Center for Plant Biology School of Life Sciences Tsinghua University Beijing 100084 R R. China Institute of Botany Chinese Academy of Sciences Nanjing 210014 P R. China

Malate dehydrogenase（MDH） is a key enzyme that catalyzes the reversible oxidation of oxaloacetate to malate and plays an important role in the physiological processes of plant growth and development. However, cyto- solic malate dehydrogenase（cMDH）, which is crucial for malate synthesis in the cytosol, still has not been extensively characterized in plants. Here, we isolated a cytosolic malate dehydrogenase gene, designated as GhcMDH1, from Gossypium hirsutum and characterized its possible molecular function in cotton fiber. The cloned cDNA of GhcMDH1 is 1520 base pairs in length, and has an open reading frame of 999 base pairs, encoding for 332 amino acid residues with an estimated molecular weight of 35580 and pI of 6.35. Sequence alignment showed that the de- duced amino acid sequence of GhcMDH1 protein shared a high similarity to other plant cMDHs. Confocal and im- munological analysis confirmed that GhcMDH1 protein was subcellularly localized to the cytosol. Quantitative real-time polymerase chain reaction（PCR） revealed that GhcMDH1 was constitutively expressed in all vegetative cotton tissues, with slightly lower levels in roots than stems and leaves. Interestingly, the transcripts of GhcMDH1 were detected in 5--25 d post anthesis（DPA） fibers and highly abundant at 15 DPA fibers. The total MDH activities and malate contents of cotton fibers were positively correlated with the fiber elongation rates, suggesting that GhcMDH1 may function in malate synthesis in fast fiber elongation. In agreement with this suspicion, the recombi- nant His-GhcMDH1 protein mainly drives the reaction towards malate generation in vitro. In conclusion, our mole- cular characterization of the GhcMDH1 gene provides valuable insights to further investigate the malate equilibrium in cotton fiber development.

关键词： Cotton Cytosolic malate dehydrogenase Malate synthesis Fiber development