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Total Variation and Multisymplectic Structure for CNLS System

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Communications in Theoretical Physics 2006年第1X期46卷 28-32页

作者： SUN Jian-Qiang QIN Meng-Zhao liu ting-ting Institute of Applied Physics and Computational Mathematics P.O. Box 8009 Beijing 100088 China Institute of Computational Mathematlcs~ the Chinese Academy of Sciences P.O. Box 2719 Beijing 100080 China Institute of Acoustics the Chinese Academy of Sciences Beijing 100080 China

The relation between the toal variation of classical field theory and the multisymplectic structure is shown. Then the multisymplectic structure and the corresponding multisymplectic conservation of the coupled nonlin... 详细信息

关键词： coupled nonlinear Schroedinger system total variation multisymplectic structure multisymplectic conservation

Numerical Study on Forming Process of the PET/PA6 Component Melt in Micro Hole in Composite Spinning

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Journal of Donghua University(English Edition) 2013年第6期30卷 510-513页

作者： Wang, Lei Ji, Jun-Yang liu, ting-ting Gan, Xue-Hui Engineering Research Center of Advanced Textile Machinery Ministry of Education Donghua University Shanghai 201620 China College of Mechanical Engineering Donghua University Shanghai 201620 China

The forming mechanism of the multi-component polymer melt is always the difficult problem in the study on the composite fiber, due to the difference of the material properties. The study simulated the flow of PET/PA6 composite melt on the influence law for the velocity distribution and the micro hole＇s structure on the influence law for extrusion swelling based on the theory of the rheology and the spinning process and the structure of the spinning components by Polyflow. In addition by comparison with the previous experiments about extrusion swelling, the results show that the value of the swell ratio decreases rapidly at low values of length/ diameter and then levels off as length/diameter is increased further, whereas increases with the die exit angle increasing. The veincity distribution of the composite melt and the micro hole＇s structure have a significant influence on the extrusion swelling, which has very good guidance function for studying the forming mechanism of the composite melt and preparation of the high performance fiber.

关键词： multi-component melt velocity equation numerical simulation : PolwTow

Numerical simulation study of the influence on stability of slope by underground mining under opencast coal mine slope

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Journal of Coal Science & Engineering(China) 2011年第4期17卷 397-400页

作者： liu ting-ting LU Guo-bin TONG Li-ming School of Mining Liaoning Technical University Fuxin 123000 China

In view of the study on mining transferred from open-pit to underground, the research on the problem of the stabil- ity of slope is less. This article combined the actual situation of the Gaohai Coal Mine in Fuxin City and set up a three-dimensional model of the part of Huizhou open-pit slope by the finite difference software. Through the three-dimensional numerical simulation study of the influence on the stability of slope by underground mining, the basic characteristics of the open-pit slope deformation and the situation of basic stability were discussed. The simulation results of the mining slope of the displacement and deformation analysis of the state for mining provide a reference to the slope stability research.

关键词： numerical simulation slope stability open-pit mine pit mining

Successful Agrobacterium-mediated transformation of Populus tomentosa with apple SPDS gene

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Forestry Studies in China 2008年第3期10卷 153-157页

作者： liu ting-ting PANG Xiao-ming LONG Cui ZHANG Zhi-yi Key Laboratory for Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education Beijing Forestry University Beijing 100083 P. R. China

The problem of salinized soils has become one of the most serious constraints to agricultural and forest productivity. With the purpose of enhancing salt stress tolerance of Populus tomentosa, we transformed this tree species with spermidine synthase （SPDS） genes derived from an apple by an Agrobacterium-mediated method. Four transgenic clones were confu＇med by PCR and Southern blot analysis. As well, the expression of introduced SPDS genes was analyzed by real-time quantitative PCR.

关键词： salt tolerance spermidine synthase gene transformation Populus tomentosa

Genome-wide identification and analysis of the regulation wheat DnaJ family genes following wheat yellow mosaic virus infection

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Journal of Integrative Agriculture 2022年第1期21卷 153-169页

作者： liu ting-ting XU Miao-ze GAO Shi-qi ZHANG Yang HU Yang JIN Peng CAI Lin-na CHENG Ye CHEN Jian-ping YANG Jian ZHONG Kai-li State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products/Key Laboratory of Biotechnology in Plant Protection of Ministry of Agriculture and Rural Affairs and Zhejiang Province Institute of Plant VirologyNingbo UniversityNingbo 315211P.R.China Institutes of Biomedical Sciences Fudan UniversityShanghai 200032P.R.China Institute of Forest Health Zhejiang Academy of ForestryHangzhou 310021P.R.China

The co-chaperone DnaJ plays an important role in protein folding and regulation of various physiological activities, and participates in several pathological processes. DnaJ has been extensively studied in many species including humans,drosophila, mushrooms, tomatoes, and Arabidopsis. However, few studies have examined the role of DnaJ in wheat(Triticum aestivum), and the interaction mechanism between TaDnaJs and plant viruses. Here, we identified 236 TaDnaJs and performed a comprehensive genome-wide analysis of conserved domains, gene structure and protein motifs, chromosomal positions and duplication relationships, and cis-acting elements. We grouped these Ta Dna Js according to their domains, and randomly selected six genes from the groups for tissue-specific analysis, and expression profiles analysis under hormone stress, and 17 genes for plant virus infection stress. In qRT-PCR, we found that among the 17 TaDnaJ genes tested, 16 genes were up-regulated after wheat yellow mosaic virus(WYMV) infection, indicating that the TaDnaJ family is involved in plant defense response. Subsequent yeast two-hybrid assays verified the WYMV NIa, NIb and 7 KD proteins interacted with TaDJC(TraesCS7 A02 G506000), which had the most significant changes in gene expression levels after WYMV *** into the molecular mechanisms of Ta Dna J-mediated stress tolerance and sensitivity could inform different strategies designed to improve crop resistance to abiotic and biotic stress. This study provides a basis for future investigation of the TaDnaJ family and plant defense mechanisms.

关键词： TaDnaJ WYMV wheat genome-wide expression hormone biotic stress HSP40

Efficacy of weight adjusted bone mineral content in osteoporosis diagnosis in Chinese female population

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Chinese Medical Journal 2019年第7期132卷 772-781页

作者： ting-ting liu Xiao-Dan Li Wen-Zhi Wang Jian-Gao Zhang Ding-Zhuo Yang Department of Internal Medicine No.4 West China Teaching HospitalSichuan UniversityChengduSichuan 610041China Department of Internal Medicine West China HospitalSichuan UniversityChengduSichuan 610041China Faculty of Construction Management and Real Estate Chongqing UniversityChongqing 400045China

Background:Areal bone mineral density(aBMD)applied for osteoporosis diagnosis unavoidably results in the missingdiagnosis in patients with large bones and misdiagnosis in those with small ***,we try to find a new adjusted index of bone mineral content(BMC)to make up shortcomings of aBMD in osteoporosis ***:In this multi-center epidemiological study,BMC and aBMD of lumbar spines(n=5510)and proximal femurs(n=4710)were measured with dual energy X-ray absorptiometry(DXA).We analyzed the correlation between the bone mass and body weight in all subjects including four age groups(50 years).And then the body weight was used for standardizing BMC(named wBMC)and applied for the epidemiological analysis of osteoporosis?Results:The correlation of body weight and BMC is 0.839 to 0.931 of lumbar vertebra 1-4(Li_4),and 0.71 to 0.95 of femoral neck in different age *** aBMD was applied for diagnosing osteoporosis,the prevalence was 7.55%,16.39%,and 25.83%in patients with a high,intermediate,and low body weight ***,the prevalence was 21.8%,18.03%,and 11.64%by wBMC applied for diagnosing ***,the prevalence of osteoporosis increased by 3.76%by wBMC with the body weight increased by 5 *** prevalence decreased by 1.94%when the body weight decreased by 5 ***:wBMC can reduce the missed diagnosis in patients with large body weight and reduce misdiagnosis in those with small body *** children,wBMC may be feasible for osteoporosis diagnosis individuals at any age.

关键词： Bone mineral content Weight-standardized bone mineral content Bone density Dual-energy X-ray absorptiometry Osteoporosis

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镁合金“固溶强化增塑”理论的发展和应用

中国有色金属学报 2019年第9期29卷 2050-2063页

作者：刘婷婷潘复生西南大学材料与能源学院重庆400715 重庆大学国家镁合金材料工程与技术研究中心重庆40044

镁是密排六方结构金属,滑移系较少,其基面滑移阻力比柱面和锥面滑移阻力低很多,基面滑移启动后其他滑移系很难启动,导致镁合金室温和低温的塑性变形能力较差。重庆大学等单位研究发现某些特定原子固溶在镁中既能阻碍基面位错滑移提高强... 详细信息

镁是密排六方结构金属,滑移系较少,其基面滑移阻力比柱面和锥面滑移阻力低很多,基面滑移启动后其他滑移系很难启动,导致镁合金室温和低温的塑性变形能力较差。重庆大学等单位研究发现某些特定原子固溶在镁中既能阻碍基面位错滑移提高强度,又能通过缩小基面与非基面滑移阻力差距促进非基面滑移开启而改善塑性,达到同时提高镁合金强度和塑性的目的。重庆大学镁合金科研团队把这一结果发展为"镁合金固溶强化增塑"合金设计理论(Solid solution strengthening and ductilizing,SSSD)。这一合金设计理论在过去十几年中已成为解决镁合金强度和塑性平衡优化的一条新途径。重庆大学应用该理论开发了多种新型高性能镁合金,其中10多个新合金已批准为国家标准牌号合金和国际标准牌号合金。

关键词：镁合金强度塑性固溶强化增塑

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大功率激光二极管列阵的硅基微通道热沉研制

光学精密工程 2009年第9期17卷 2170-2175页

作者：杨涛何叶刘婷婷西南科技大学信息工程学院四川绵阳621010

为了提高大功率激光二极管列阵的散热效率以便提高其寿命和波长稳定性,研制了一种封装集成度较高的屋脊式硅基微通道热沉。将田口稳健设计方法用于微通道热沉的优化设计,利用正交试验和信噪比分析实现了参数的稳健优化。以(110)单晶硅... 详细信息

为了提高大功率激光二极管列阵的散热效率以便提高其寿命和波长稳定性,研制了一种封装集成度较高的屋脊式硅基微通道热沉。将田口稳健设计方法用于微通道热沉的优化设计,利用正交试验和信噪比分析实现了参数的稳健优化。以(110)单晶硅作为基片,采用KOH各向异性刻蚀和硅-玻璃-硅三层阳极键合方法制作出了通道宽度约为50μm的微通道热沉,通道壁面粗糙度优于0.1μm。采用激光二极管芯片对样品进行了封装和测试,利用砷化镓激光波长的温度漂移系数估算出了中间激光二极管的有源区温升,从而计算出了热沉的热阻。测试结果表明,该微通道热沉的单位面积热阻约为0.070 cm2.K/W,与有限元分析结果基本一致。

关键词：激光二极管列阵微通道热沉稳健设计数值传热分析封装

光谱法和分子对接技术研究胡桃醌与人血清白蛋白的相互作用

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分析化学 2020年第10期48卷 1383-1391页

作者：申炳俊柳婷婷长春理工大学生命科学技术学院

胡桃醌（Jug）是民间抗癌验方青龙衣的主要活性物质之一,其与蛋白质的相互作用及作用机理研究鲜见报道。本研究在模拟人体生理条件下,利用内源荧光光谱、紫外吸收光谱、同步荧光光谱、三维荧光光谱以及分子对接技术,研究了Jug与人血清... 详细信息

胡桃醌（Jug）是民间抗癌验方青龙衣的主要活性物质之一,其与蛋白质的相互作用及作用机理研究鲜见报道。本研究在模拟人体生理条件下,利用内源荧光光谱、紫外吸收光谱、同步荧光光谱、三维荧光光谱以及分子对接技术,研究了Jug与人血清白蛋白（HSA）之间的作用机理。荧光光谱结果表明,Jug能有效猝灭HSA内源荧光,猝灭机制属静态猝灭,通过Lineweaver-Burk方程求得两者间结合常数（K;）为3.72×10;L/mol （310 K）,结合位点数（n）约为1。根据Van′t Hoff定律计算得到的热力学参数(ΔH=-142.07 kJ/mol和ΔS=-409.08 J/（mol·K）)表明,Jug与HSA之间的主要作用力为氢键和范德华力。根据F9rster′s能量转移定律,确定Jug与HSA结合距离为2.61 nm。紫外吸收光谱、同步荧光光谱和三维荧光光谱研究发现,Jug对HSA二级结构有轻微影响,使酪氨酸（Tyr）残基周围微环境疏水性增加。分子对接结果进一步表明,Jug通过范德华力、氢键和疏水作用力与HSA的亚域ⅢA中氨基酸残基进行作用。本研究有助于从分子水平上了解Jug在人体内的储藏运输过程以及对蛋白质功能的影响机制。

关键词：胡桃醌人血清白蛋白荧光光谱紫外吸收光谱同步荧光分子对接技术