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Horizontal Velocity of Variable Gauge Rolling:Theory and Finite Elements Simulation

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Journal of Iron and Steel Research International 2013年第10期20卷 10-16页

作者： zhang guang-ji LIU Xiang-hua HU Xian-lei ZHI Ying State Key Laboratory of Rolling and Automation Northeastern University

Within the production chain of longitudinal profiled （LP） plates and tailor rolled blanks （TRB）, variable gauge roiling （VGR） represents the vital important forming stage, in which shape and properties are tailored to sat- isfy customers＇ requirements. It is of vital importance to reveal the relationship between work-piece horizontal veloci- ty and roll vertical velocity during VGR, which is not only a key point to understand the deformation law, but also an important content for setting VGR process parameters. It is proved that the simplified assumption of equal dis- charge per second condition （EDSC） breaks down during VGR. Due to this reason the differential equation of the work-piece horizontal velocity （VGR-V） is performed by keeping the material volume constant. To attain a compre- hensive understanding of this underlying process in detail, numerical approaches based on finite elements method have been performed by utilizing the Abaqus Explicit. Rolling experiment is carried out which indicates that the nu- merical result coincides with the expel＇imental result well. A fine spatial discretization of work-piece is essential for special emphasis has to be put on detecting different horizontal velocity of work-piece cross section, often leading to a hundred thousand degrees of freedom even for plane strain calculations. The data obtained by using Abaqus Explicit coincide with the results determined by theory. A theoretical basis on deformation parameters and mechanical param- eters during VGR process is provided.

关键词： variable gauge rolling horizontal velocity non-linear finite element analysis

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张光霁治疗不寐用药经验撷萃

中华中医药杂志 2021年第6期36卷 3382-3384页

作者：李静康静怡张光霁浙江中医药大学基础医学院杭州310053

张光霁教授对中医药治疗不寐颇有见解,主张因人制宜,根据性别、年龄、病症等辨证施治疗,重视用药安全;善用龙骨-牡蛎、合欢皮-夜交藤、黄连-肉桂、半夏-秫米等药对,达药之虞,药简效专;重视剂量,执古不泥,制方有度;根据时间医学,择时用药... 详细信息

张光霁教授对中医药治疗不寐颇有见解,主张因人制宜,根据性别、年龄、病症等辨证施治疗,重视用药安全;善用龙骨-牡蛎、合欢皮-夜交藤、黄连-肉桂、半夏-秫米等药对,达药之虞,药简效专;重视剂量,执古不泥,制方有度;根据时间医学,择时用药,注重药后调养休息。

关键词：张光霁失眠经验药对剂量择时用药

Analysis for Robust Stability of Hopfield Neural Networks with Multiple Delays

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自动化学报 2006年第1期32卷 84-90页

作者： zhang Hua-guang ji Ce zhang Tie-Yan Key Laboratory of Process industry Automation Ministry of Education Northeaste.rn University Shenyang 110004

The robust stability of a class of Hopfield neural networks with multiple delays and parameter perturbations is analyzed. The sufficient conditions for the global robust stability of equilibrium point are given by way of constructing a suitable Lyapunov functional. The conditions take the form of linear matrix inequality (LMI), so they are computable and verifiable efficiently. Furthermore, all the results are obtained without assuming the differentiability and monotonicity of activation functions. From the viewpoint of system analysis, our results provide sufficient conditions for the global robust stability in a manner that they specify the size of perturbation that Hopfield neural networks can endure when the structure of the network is given. On the other hand, from the viewpoint of system synthesis, our results can answer how to choose the parameters of neural networks to endure a given perturbation.

关键词：神经网络多重延迟参数干扰鲁棒控制稳定性

The Heterogeneity and Its Influencing Factors of Soil Nutrients in Peak-Cluster Depression Areas of Karst Region

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Agricultural Sciences in China 2007年第3期6卷 322-329页

作者： zhang Wei CHEN Hong-song WANG Ke-lin SU Yi-rong zhang ji-guang YI Ai-jun Institute of Subtropical Agriculture The Chinese Academy of Sciences Changsha 410125 P.R.China Huanjiang Experimental Station of Karst Ecosystem Huanjiang 547100 P.R.China Graduate School Chinese Academy of Sciences Beijing 100049 P.R.China

By selecting a typical peak-cluster depression area of karst region in Southwest China, we evaluated the effect of land use types and topographic factors on soil nutrients. Grid and line sampling methods were used to sample soil in depression and slope lands respectively, and classical statistical tools were applied to analyze the spatial variability character of soil organic carbon （SOC）, total nitrogen （TN）, total phosphorus （TP）, total potassium （TK）, available nitrogen （AN）, available phosphorus （AP）, available potassium （AK）, pH, and C/N. It was found that land use type was the dominant factor that effected the spatial heterogeneity of SOC, TN, TP, TK, AN, and AP. The content of SOC, TN, and AN decreased with the increase of land use intensity. Due to high fertilizer input, TP and AP in tillage fields were higher than those in the other land use types. TK had no obvious change trend among various land use types. Topographic factors had a significant effect on SOC, TN, TP, AN, AP, AK, and pH. Habitat factor was the dominant factor that effected AK. Altitude factor was the dominant factor for pH. However, all of these factors had no significant effect on C/N. Tillage practice had important effect on soil nutrients loss and soil degradation in the fragile karst ecosystem, and the input of organic manure should be increased in this region.

关键词： karst peak-cluster depression soil nutrient land use type topography factors soil organic carbon

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张光霁治疗失眠经验举隅

中华中医药杂志 2020年第9期35卷 4480-4482页

作者：王志红张光霁杭州市萧山区中医院杭州311200 浙江中医药大学杭州310053

随着现代生活节奏的加快,工作压力与日俱增,情志不遂的患者日渐增多,失眠的发生率不断提高。中医药在治疗失眠方面历史悠久,理论完备,方法多样。张光霁教授从事临床工作30余年,对失眠的治疗经验丰富,认为失眠的病因病机可从3个方面进行... 详细信息

随着现代生活节奏的加快,工作压力与日俱增,情志不遂的患者日渐增多,失眠的发生率不断提高。中医药在治疗失眠方面历史悠久,理论完备,方法多样。张光霁教授从事临床工作30余年,对失眠的治疗经验丰富,认为失眠的病因病机可从3个方面进行归纳:脏腑气血不足、邪客犯体、情志不遂,其中因情志不遂而导致的失眠应当加强重视。治疗上分别采用调补五脏、祛邪泄实、调节情志等方法,佐以安神定志。临床上善于运用中医综合疗法,以经方主之,针灸次之,辅以心理疗法及五音疗法。根据患者临床表现的不同,调整阴阳,舒缓情志,执和以中,疗效满意。

关键词：中医失眠张光霁辨证论治经验总结

Status quo and countermeasures of energy audit in oil and gas field enterprises

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Journal of Modern Accounting and Auditing 2008年第12期4卷 13-16页

作者： zhang guang-bao SHI ji-kun School of Economic Management Daqing Petroleum Institute Daqing 163318 China

To develop energy audits in oil and gas field enterprises has important and realistic significance. Chinese energy audit in oil and gas field enterprises is still in the exploratory stage, the paper puts forward some ... 详细信息

关键词： oil and gas field enterprises energy audit power-wasting facility evaluation system

Pharmacokinetics of recombinant human basic fibroblast growth factor in rabbits and mice serum and rabbits aqueous humor

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Acta Pharmacologica Sinica 2004年第8期 17-21页

作者： Qi zhang, guang-ji WANG, jian-guo SUN Center of Drug Metabolism and Pharmacokinetics, China Pharmaceutical University, Nanjing 210009, China

AIM: To study the pharmacokinetics of recombinant human basic fibroblast growth factor (rhbFGF) in rabbits and mice after iv and postocular administration, and the changes of rhbFGF in rabbits aqueous humor after postocular administration. METHODS: After iv or postocular administration three doses of rhbFGF in rabbits and mice, rhbFGF concentration in serum and rabbit aqueous humor was determined by enzyme-linked immunosorbent assay. RESULTS: Serum concentration-time data of rabbits after iv administration of rhbFGF 1, 2, and 4 μg/kg were fitted to bi-exponential equations with half-lives of 0.9, 0.9, and 0.6 min for T1/2α and 7, 8, and 4.7 min for T1/2β. Plasma concentration-time data of mice after iv administration of rhbFGF 2.5, 5 and 10 μg/kg were fitted to bi exponential equations with half-lives of 0.4, 0.6, and 0.9 min for T1/2α　and 6, 5, and 7 min for T1/2β.The AUCs were linearly correlated to doses in both cases (rrabbit=0.997, rmouse=0.999). The serum concentrations of rhbFGF were very l

关键词： fibroblast growth factor 2 pharmacokinetics enzyme-linked immunosorbent assay aqueous humor rabbits mice

分光光度法测定地质样品中Mo的不确定度评定

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计量学报 2013年第2期34卷 196-200页

作者：张激光国土资源部沈阳矿产资源监督检测中心辽宁沈阳110032

通过对分光光度法测定地质样品中钼元素质量比全过程分析，确定了测定结果不确定度的来源并加以评定。采用最小二乘法对标准曲线进行线性回归，通过对2个不同质量分数样品的不确定度评定，证明样品的重复性测定和标准曲线拟合引入的不... 详细信息

通过对分光光度法测定地质样品中钼元素质量比全过程分析，确定了测定结果不确定度的来源并加以评定。采用最小二乘法对标准曲线进行线性回归，通过对2个不同质量分数样品的不确定度评定，证明样品的重复性测定和标准曲线拟合引入的不确定度为总不确定度的主要贡献者，且样品Mo质量分数越低，其相对不确定度越大，这与实验室中的实际测定情况一致。

关键词：计量学地质样品钼分光光度法不确定度评定线性回归

Calculation of wave and current loads on launching offshore jacket

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Journal of Marine Science and Application 2006年第4期5卷 1-7页

作者： zhang guang-fa ji Zhuo-shang LI Tie-li LIN Yan Department of Naval Architecture and Ocean Engineering Dalian University of Technology Dalian 116024 China

It’s very complicated to calculate and analyze the wave and current loads on naval architectures since the sea condition is uncertain and complicated and the determinants vary from different form types and dimensions. For calculating the wave and current loads on upright small-long-size pipe, the Morrison equation is practical and applied. Jacket platform is a kind of offshore space frame structure comprised of lots of poles that are circular cylinders with small diameter and in the oblique status relative to seabed. In this paper, based on Morrison equation, the specific method and procedure calculating the wave and current loads on launching jacket are given and applied on a typical launching jacket. The instance shows that the method and procedure are convenient and make the calculation and analysis in good agreement with actual launching.

关键词： launching hydrodynamic force morrison equation jacket platform