Dynamical Idnetification for Blast Furnace Condition

The correlation dimension for the time series of blast furnace process varisble,such as blast volume, burden pressure drop and blast pressure etc.,have been estimated by using GP and modified GP algorithms.The predictublity analysis for the process variables have also been investigated.The results show that it is difficult to determine the chaotic attractor of blast furnace condition.It has been found that the predictablity for process variables can be used to niterpret and identity the precursor of biast furnace condition.     

节水灌溉对水稻抗逆生理性状的影响

通过防雨篷池栽试验,以土水势为灌水下限控制指标,重点研究了不同节水灌溉条件下水稻结实期时丙二醛（MDA）含量、细胞质膜透性、渗透调节物质等生理形状指标相对值变化规律。研究结果表明,在适宜土壤水分胁迫下,即土水势高于-30kPa,丙二醛（MDA）含量、细胞质膜透性、可溶性糖含量和游离氨基酸含量相对值有所升高,当土壤水分低于灌溉下限复水至土壤饱和时,有所恢复,随着生育时期延长,变化趋势平稳,这说明叶片本身存在一定对干旱胁迫适应与调节能力。当水势低于-30kPa时,丙二醛（MDA）含量、细胞质膜透性、可溶性糖含量和游离氨基酸含量相对值显著升高,抗旱性强品种的丙二醛（MDA）含量、细胞质膜透性增加或升高幅度小,抗旱性强品种可溶性糖含量和游离氨基酸含量升高幅度大。花后16天,细胞质膜透性、可溶性糖含量和游离氨基酸含量相对值降低。     

Numerical Simulation for Dynamic Response of Large Space Cylindrical Reticulated Shell under Internal Explosion by Ritz POD Method

A numerical simulation test of the internal explosive loading on large space structure was carried out by employing algorithm ANSYS/LS DYNA.An appropriate model was established for calculating the dynamic responses of the large space cylindrical reticulated shell under inner blast loading based on the proof of correctness and reliability of the model and parameters selection.Combining the Ritz vibration mode superposition method with the Proper Orthogonal Decomposition (POD) method, the problems of spatiotemporal asynchrony of shock waveforms and pressure distributions on large space structure surface were solved and the calculation for dynamic response of large space structure was reduced and simplified.Furthermore, the numerical simulation of dynamic responses was carried out.And the influence of the ratio of rise to span and the explosive position on the dynamic responses of the structure was studied.It was found that the calculation model was suitable for the dynamic response analysis of the large space cylindrical reticulated shell under internal explosion and the cylindrical reticulated shells with bigger ratios of rise to span were stronger in the capacity of anti explosion.In general, the damages to the large space structure caused by eccentric blast shock waves were more serious than that caused by central explosion.And it was the most disadvantageous to the edge components of the structure.The more attention should be paid to the anti explosion capacity of the support areas and the edge components while designing the shells.     

利用病菌培养液离体筛选水稻抗稻瘟病植株研究

以稻瘟病菌粗毒素提取液作为抗性筛选的选择压，对水稻体细胞系和花药及其愈伤组织进行抗病筛选。结果表明，毒素对体细胞和花药愈伤组织的诱导和植株再生有着明显的抑制作用，抑制程度随浓度的增加而增大，经过滤灭菌的粗毒素的毒性大于高压灭菌的毒性，花药的抑制程度大于种子胚愈伤组织，花药筛选系统的适宜毒素浓度低于体细胞筛选系统的毒素浓度。粗毒素液可以作为抗病筛选的选择压。     

The Indoor Experiment Study on Pore Water Pressure Increment and Dissipation of Saturated Sand Caused by Blasting

An indoor experiment on explosive compaction of saturated sand has been done.The changes of pore water pressure during blasting are measured and the laws of pore water pressure increment and dissipation are analyzed.It indicates that the processes of increment and dissipation of pore water pressure have particularity along the depth and radial.At the same time,the development rule of liquefaction under explosive loading is also analyzed;these conclusions obtained in the experiment,may provide some useful references for the engineering design and the theoretic study of explosive compaction for water-saturated granular foundation.     

大豆堆压缩特性的实验研究

使用TSZ-6A型应变控制式三轴仪对不同围压(8kPa~200kPa)、不同含水率(9.8%、11%、13.5%、14.8%、15.8%w.b.)的黑龙江省大豆堆的体积变化和体变模量进行了测定,分析了围压与含水率对大豆堆体变模量的影响。体变模量随着围压(8kPa~200kPa)的增大而增大,大豆实验结果表明:对含水率为9.8%w.b~15.8%w.b、围压为8kPa~200kPa的大豆堆,其体变模量范围为227.94kPa~610.58kPa。相同含水率的大豆堆的体变模量随着围压(8kPa~200kPa)的增大而增大;同一围压下,大豆堆体变模量随着含水率(9.8%w.b~15.8%w.b)的增大而减小。     

小麦堆体变模量的测定与实验研究

利用应变控制式三轴仪对小麦的体积压缩和体变模量进行了实验测定,并探讨了围压和水分对体变模量的影响。结果表明:小麦堆的体积随着围压的增大而减小;小麦堆(水分为13.7%、16.4%、18%)的体变模量随着围压(5 kPa～30 kPa)的增大而增大,它们的体变模量的范围分别为173.5 kPa～259.3 kPa、164 kPa～240 kPa、151 kPa～229.4kPa;小麦堆体变模量随着水分的增大而减小,当小麦堆围压为30 kPa,水分为13.7%～18%时,它的体变模量变化范围为223.5 kPa～270 kPa。     

Effects of Vibration History on Modulus and Damping of Clay

Aiming at evaluating the effects of vibration history on dynamic characteristics of normally consolidated clay, a series of multi-cycled cyclic shear tests were conducted on 16 soil samples under consolidation pressure of 50 kPa, 100 kPa, 300 kPa and 500 kPa respectively. The experimental results reveal that, on the stage of drainage and consolidation, with the development of duration shear modulus curve ascends while damping curve descends; this trend became significant as consolidation pressure increased. The variation tends to be stable in 25 hours. When subjected to cyclic loading controlled by constant strain amplitude, both the modulus and damping of soil samples change significantly during the first 50 cycles, and then the differences become moderate afterwards, in which the damping curve acts in hyperbolical type. It is also found that there exists a clear sign of pre-straining that affects damping more significantly than modulus.     

Theoretical and Experimental Analysis on the Pressure Filtration Technology in Slurries Treatment

Treatment of waste drilling slurries has become one of the important problems encountered in urban construction. The application of pressure filtration technology brings significant advantages in slurries treatment. In order to give a better insight into the mechanism of pressure filtration, a model was introduced to analyze the relationship between filtration pressure, time and treatment results. The proposed model was validated using existing data. The parametric studies of the model show that the increase of the filtration pressure can reduce the filtration time and the permeability coefficient of the filter cake, While filtration time decreases very slowly beyond a certain extent. In addition, the relationship among filtration pressure, time and treatment results is further validated by test results.     

Study on the Factors Affecting Gas Permeability of Coal

In this paper,the permeability of coal from Nantong colliery is studied in a labo-ratory. The effects of desorbed gas temperature and water content on gas permeability were investi-gated. The results of experiments indieatd that decreasing gas pressure without desorption , the permeability of coal decreases, However, below the desorption pressure, the permeability of coal formethane increases, The reaults suggest that the logarithm of permeability of coal is a linear functionof the temperature and the permeability of coal saturated with water is lass than the permeability ofdry coal; with the increase of water content, the permeability of coal for methane is increasing.     

Mathematical Model of Oxygen Blast Furnace with Preheating Gas Injection into Upper Shaft

An One-dimensional mathematical model,based on oxygen blast furnace with preheating gas injection into upper shaft,has been developed to describe the variation of innerdiameter of blast furnace,13 chemical reactions,the heat losses through the furnace wall,the heatexchange and pressure losses between gas phase and solid phase.The characters of oxygen blastfurnace are discussed,The simulated results indicate that the tem perature of burden in creasesthroughout the upper shaft with the incrcasement of the flow and the temperature of preheating gasinjected,and that the effect of the heating-up of burden is not so large when the com positions ofpreheatin8 gas injeetion are changed.The model is contributed to obtain a deeper understanding ofthe oxygen blast furnace process.     

水稻稻瘟病抗病基因Pi63顺式作用元件的载体构建

水稻稻瘟病抗性基因Pi63具有良好的田间抗性,且抗性与其表达量成正相关,但Pi63表达的调控机制尚未得到研究。为了研究Pi63的抗性机理,通过对Pi63启动子区域顺式作用元件的生物信息学分析,分段构建了4个含有不同顺式作用元件的缺失体,将上述缺失体转入植物双元表达载体pCAMBIA1391Z中。菌落PCR以及质粒DNA酶切鉴定后,经测序进一步确认。结果表明：以上4个缺失体载体构建成功。本研究为进一步研究启动子中不同顺式作用元件对于Pi63基因稻瘟病抗性的影响以及Pi63基因的表达特性奠定了基础。     

Predicting System of Hot Metal Silicon Content in Blast Furnace

Hot metal silicon content in blast furnace is a main parameter by which product quality is measured and energy utilization ratio of blast furnace is reflected.The precise predicted results of hot metal silicon content can be used to direct batch operation and smelting operation of blast furnace.And the purpose of reducing hot metal silicon content is realized.The equations of thermodynamics and dynamics were deduced based on the reduction mechanism of silicon. And the predicting model of hot metal silicon content was obtained.With this model and the calculation methods of blast furnace's materiel and energy balance,the predicting system of hot metal silicon content was programmed.Real materiel conditions and operation parameters wre inputted into the system.And predicted values of hot metal silicon content were gained.Compared with measured values the deviations of predicted values were small.So it is testified that this predicting system has credibility in practice.     

灰色人工神经网络在稻瘟病发生预报中的应用

摘要：针对稻瘟病在水稻生长过程中存在的严重危害,笔者基于四川资中地区1998-2008年的稻瘟病发生资料,运用灰色人工神经网络的方法（GBP ）,建立了稻瘟病发生的预报模型,结果表明：灰色人工神经网络模型的平均相对误差为0.0946,远远优于GM(1,1)模型的1.8857。灰色人工神经网络模型可以拟合任意一种函数关系,且该模型信息利用率高,避免了系统数据辨识方法在序列累加时因正负抵消而产生信息失真的现象。灰色人工神经网络模型的拟合和预测精度较高,可以用于该地区稻瘟病发生的预测工作。     

土壤水分对水稻产量与品质的影响

采用上育397和绥粳3号水稻品种,于分蘖期、长穗期、抽穗后1～10 d、11～20 d、21～30 d及1～30 d,用负压式土壤湿度计监测,分别进行土壤水势为－30～－35 kPa、－60～－65 kPa的控水处理。结果表明,抽穗前土壤水势控制在－30～－35 kPa时,两品种的产量均显著降低,以长穗期产量最低,进一步降低土壤水势产量不再明显下降;分蘖期控水的减产幅度以上育397＞绥粳3号,长穗期以上育397＜绥粳3号;2个品种穗分化期控水对籽粒品质影响最大,质量质数最低,其他时期相差不大,因此,穗分化期不仅是水稻产量的水分敏感期,也是品质的水分敏感期;比较两品种相同处理的抗旱系数和质量质数,抽穗前控水处理对产量的影响大于对品质的影响,尤其是劣势粒中表现的更为突出,抽穗后多数处理对品质的影响大于对产量的影响。     

Intellectual prediction of a permeability index for blast furnaces

The permeability index for blast furnaces is an important monitoring parameter in their operation. Proper trend prediction of the permeability index is important for good operation. Support vector machines (SVM) combined with wavelet analysis are adopted to build a forecasting model. Four historic values of a permeability index are analyzed by a wavelet analysis via seven levels. Based on eight wavelet analyzed values and combined with operating parameters, eight sub models are built using the least square support vector machines method. The prediction components are reconstructed to obtain a forecast. The details of modeling, validation and result analyses are presented.     

稻瘟病菌株的DNA指纹及其与小种致病性相互关系的研究

稻瘟病菌生理小种的鉴别对培育抗稻瘟病水稻品种具有重要意义。传统方法利用一套鉴别品种区分小种既复杂又易受各种因素的影响。我们在日本稳定菌株北1的基因组文库中筛选出了一套含重复顺序的克隆，2 个克隆被证实具有高度的多态性。用其中的POR6对17个稻瘟病菌株Southern分析，获得了可分辨和重复的基因组特异的指纹图谱。     

外源Si对水稻生长状况及稻瘟病抗性的影响

外源Si对提高水稻对病害的抗性有显著影响,但水稻应激防御系统对外源Si的响应机制尚缺乏深入研究。为探究不同浓度外源Si对稻瘟病胁迫下水稻的生长状况、产量及抗性的影响,在人工接种稻瘟病菌的条件下进行水稻盆栽试验。测算了水稻株高、穗数、穗长、地上部生物量和千粒重等生长数据,同时测量了水稻稻穗中MDA的含量和防御相关酶(PPO、CAT、SOD、POD)的活性。结果表明,施Si处理使水稻的稻瘟病病情指数下降了44.47%;显著提高了稻穗中PPO、CAT和SOD的活性,降低了POD的活性和MDA含量,缓解了稻瘟病引起的氧化胁迫;显著增加水稻株高,使其茎叶更加挺直,降低病菌的感染和传播;最终提高地上部干物质量积累,相比染病组的产量提高61.2%。因此,Si能够通过参与植物生理代谢过程,有效增强水稻抵御稻瘟病的抗性,提高植株活力,有效减少植株损伤。     

福美双和戊唑醇增效与拮抗组合对小麦赤霉病菌细胞膜透性及内含物渗漏的影响

药剂对病原菌的联合作用通常表现为增效、相加和拮抗三类形式。为了揭示药剂组合产生增效与拮抗的特性,本文通过菌丝生长速率法,进行了福美双与戊唑醇药剂组合对小麦赤霉病菌的协同增效作用测定。选择福美双与戊唑醇配比为7:10的增效组合（SM,EC500.0331μg/mL）、配比为9:4的拮抗组合（AM,EC502.2937μg/mL）,通过电导率法检测菌丝细胞膜通透性的改变程度,试图比较增效与拮抗药剂组合的差异。增效组合处理菌丝细胞后,60min后的电导率一直表现上升,表明存在着菌丝细胞内含物不断外渗的现象;而拮抗组合处理的菌丝细胞渗透性比对照较弱。测定菌丝细胞渗漏的还原糖、几丁质酶、可溶性蛋白等三种细胞内含物含量,发现其随时间变化趋势不同：增效组合使还原糖含量在25 h时,下降为对照的18.91%;几丁质酶活性在5~20 h之间增加;可溶性蛋白含量短期内上升随后下降。而在拮抗组合条件下,菌丝细胞内含物含量随时间的变化与对照或某一单剂趋势相同。药剂组合协同增效作用测定和增效与拮抗组合的作用机理探讨,应成为筛选和评价药剂增效组合的依据。     

Biocompatibility of Acellular Porcine Dermis

In vitro cultured vascular endothelial cells (VEC) and mouse 3T3 fibroblasts (3T3) on the acellular dermal matrix , which were made of porcine skins. We made the cell proliferation test with MTT assay and the histological observation after cells were seeded on the acelluar dermis for 1 week with histological section. The cell growth curves showed VEC and 3T3 grew much rapidly on the acelluar dermis.The histological observation revealed VEC had formed a monolayer, some places even had formed 2 to 3 layer. The results suggest that the acelluar porcine dermal matrix have good biocompatibility , it will be widely applied.