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In order to evaluate the capability of lignin degradation and pitch elimination from Masson pine chips by nature white-rot fungi, 20 white-rot fungus strains were obtained by petri dishes screening and petri dishes color-reaction screening. One G strain with the lowest Mycel/Col value was then inoculated onto the surface of Masson pine chip, and the degradation rates of lignin and pitch were measured after 3, 5, 7, 9 days, respectively.
为评价从野外筛选得到的白腐菌对造纸原料马尾松的木素降解和树脂脱除能力,将带菌样本经室内平板初筛及平板变色反应复筛,得到了20株纯白腐菌菌株,并对变色系数最小的一株菌株G进行松木片固体接种试验,测定3、5、7、9天后松木片的木素、树脂降解情况。
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In order to evaluate the capability of lignin degradation and pitch elimination from Masson pine chips by nature white-rot fungi,20 white-rot fungus strains were obtained by petri dishes screening and petri dishes color-reaction screening.
为评价从野外筛选得到的白腐菌对造纸原料马尾松的木素降解和树脂脱除能力,将带菌样本经室内平板初筛及平板变色反应复筛,得到了20株纯白腐菌菌株,并对变色系数最小的一株菌株G进行松木片固体接种试验,测定3、5、7、9天后松木片的木素、树脂降解情况。
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According to the plane cross section assumption, configuration of a rod is expressed as a history of the cross section with arc coordinate. A special solution which stands for equilibrium in straight line state is obtained from differential equilibrium equation. Linear perturbation equation is derived and its general solution is obtained in which the integral constants are determined by constrained conditions at two ends of the rod. The condition of existence of non zero solution of the integral constants gives to the Greenhill formula of exact elastic rod model, which shows that the boundary of stable area is a closed curve and of symmetry, and inference of shearable and extensible to stability of the rod is depend on three factors: difference between flexibility of shear and extension of a section of the rod, bending stiffness and the length of the rod.
基于平面截面假定,弹性杆的位形表达为截面的弧坐标历程,根据平衡微分方程得到了两端受力螺旋作用时的直线平衡特解,导出了线性化扰动方程及其通解,积分常数根据两端铰支时的边界条件确定,并根据其存在非零解的条件得到弹性直杆精确模型的Greenhill公式,表明稳定域为一对称的封闭区域,拉/压和剪切对稳定性的影响取决于:拉/压柔度与剪切柔度之差,抗弯刚度和杆长这三个因素
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By combining analysis center cutting plane methods which have developed fast in the last years, we get a analysis center cutting plane methods for convex semi-infinite programming, which has a good convergence under modest assumptions.
第二章结合近期发展起来的分析中央割平面算法,在一定的假设条件下,得到了一个凸半无限规划问题的分析中央割平面算法,并得到了很好的收敛性结果。
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Projectors and monitoring hydrophones are placed n a chamber along its length. The projectors are driven By the required drives that are calculated aceording to a measured transfer matrix, and amplitude, frequency and incident of the predicted plane wave. Then the acoustic pressure field distribution which is equivalent to the predicted plane wave of any incidence is set up in the chamber. A prototype calilbration system has been developed.
在管中沿管轴方向布置一系列发射换能器和监测水听器,根据实测得到的传递函数矩阵和所要模拟的平而波频率、幅度和入射角计算得到一组发射换能器驱动信号的幅度和相位,然后以此信号激励每个发射换能器,就能在管中形成一个等同于任意角度入射的自由场平面波声场的声压分布。
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Combining with the National Natural Science Foundation ofChina(No.50478032), following researches were done in this thesis: 1 The variation regularity of the ultimate anti-bending capacity of therectangular-sectioned beam with different corrosion has been obtained through thequalitative analysis of 48 beams (32 corroded beams and 12 comparing beams) withaccelerated corrosion; 2 The conclusion has been obtained that the strain of corroded steel bar andconcrete no longer fit in with the assumption of plane section through the analysis ofthe strain data, the strain relation of steel bar and concrete in the mid-span section ofvariously corroded beams at ultimate has been obtained. Through the building of newgeometric relation, the expression of the height of compressive area in the corrodedbeam with rectangular section has been deduced, and the formula with corrosion rateas the main variable for the anti-bending capacity of the corroded concrete beam hasbeen suggested and verified by experiment.; 3 The influence of steel bar corrosion and the concrete regression to the flexureductility coefficient of the corroded structure component has been analyzed. Based onthe relation of steel bar and concrete at yield and ultimate, the expression for theflexure at yield and ultimate of corroded reinforced concrete beam, and the model forthe calculation of the flexure ductility has been built.
本文结合国家自然科学基金项目(50478032)"既有钢筋混凝土桥梁时变可靠度研究",主要进行了以下研究工作: 1通过对48根快速锈蚀钢筋混凝土矩形截面梁(32根锈蚀梁和12根对比试验梁)数据的定性分析,得到了不同锈蚀率下,锈蚀钢筋混凝土矩形截面梁极限抗弯承载力的变化规律; 2通过对应变数据的分析,论证了锈蚀构件钢筋和混凝土的应变不再符合平截面假定的结论,并通过回归分析得出了不同锈蚀率的螺纹钢筋梁和光圆钢筋梁在极限弯矩作用下,跨中截面处钢筋应变和钢筋处混凝土应变的关系,通过构造新的几何关系,得出了锈蚀钢筋混凝土矩形截面梁计算受压区高度的表达式,既而得出了以锈蚀率为主要变量的锈蚀钢筋混凝土矩形截面梁的正截面抗弯计算建议公式,并通过试验数据加以验证; 3分析了钢筋锈蚀和混凝土劣化对锈蚀构件曲率延性系数的影响,结合钢筋屈服和极限弯矩两种状态下钢筋和混凝土的应变关系,分别得到了锈蚀钢筋混凝土矩形截面梁屈服曲率和极限曲率的计算表达式;既而推导出曲率延性系数的计算模型。
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The College of Abbreviators was restored, the Roman Academy was recognised, and Platina was appointed librarian. The manuscripts in the Vatican Library were increased, more ample accommodation was provided, and every facility was given to scholars to consult the papal collection.
卡利斯图斯四世采纳了尼古拉四世对文艺复兴的友善态度,重建了Abbreviators大学,认可了罗马学院,普拉提那也被任命为图书管理员,梵蒂冈图书馆得到了充足的扩容,手稿藏量也有所增加,学者得到了各种便利条件借用教皇的藏书。
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Louis Gallois, the chief executive of EADS, the parent company of Airbus, denied there was anything odd about the timing:"We do not plead guilty," he said. Our support is much more transparent than Boeing's.
Louis Gallois,空客的控股公司 EADS 的首席执行官,拒绝承认欧洲政府的决定和波音公司的诉讼在时间上有什么奇怪联系:"我们没有做有罪辩护",他说,我们得到的支持比波音公司得到的支持要透明的多。
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Lighting is computed at the poing using a combination of the normal from the center of the sphere at the point and the density gradient.
这个结果需要使用一些不透明参数做一些改动以得到特定的效果,比如增加 g_noiseOpacity 参数能够得到浓密的烟雾。
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The use of poison gas is a clear violation of international law—in particular of the Geneva Convention.
医生从我身上得到的实践,会比从一千七百个普通病人身上得到的实践还多。
- 推荐网络例句
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The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.
采用不同浓度K2CrO4(0,0.4,0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗,测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。
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By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.
通过分析数学形态学在图像中的理论基础,研究二值图像的形态分析算法,探讨最小结构元素的两种基本形态:膨胀和腐蚀;分析了数学形态学复杂算法的基本原理,把数学形态学的部分并行处理理念引入到家实际应用中。
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Have a good policy environment, real estate, secondary and tertiary markets can develop more rapidly and improved.
有一个良好的政策环境,房地产,二级和三级市场的发展更加迅速改善。