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From the point on coefficient matrix of the sets of projection equations and in a broad sense axonometric projection ,the research and summarization of the development of projection theory this two centuries has been done.
从投影方程组系数矩阵及广义轴测投影分析入手,对两个多世纪以来的投影理论发展总结评述;通过数学分析,得出计算机绘图优于手工绘制轴测图的理论依据,证明计算机绘图不仅工具方便,且理论上更具有先进性
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Wastewater containing titanium pigment was treated by microfiltration membrane, Nanometer titanium can be purified and concentrated by use of microfiltration. Operational conditions were optimized and the model was built. Finally, the amount of wash water was reduced. Based on the above research, the whole set equipment was designed, which can meet the needs in a titanium industry with a capability of 500 ton per year. Backflush and automatic control were used in the equipment, which has been steadily run two years, has been widely adopted in titanium industry. The technology has been widely adopted in titanium industry.In the recent years, whole set equipment of ceramic membrane was increasingly used in the recovery of desired production from fermentation broth in China. A new membrane process integrated with pretreatment of flocculation or coagulation was exploited to recover Inosine. ZrO2 ceramic membrane was used in the work, and the average permeation flux could reach 150L/m2.h under pH value of 3, transmembrane pressure 0.1MPa, CFV 3m/s, and temperature higher than 70C. The recovery ratio of inosine is higher than traditional recovery method, although inosine degraded under acidic and high temperature condition.
实验表明,ZrO_2膜处理肌苷发酵液的合适条件为pH=3、操作压力为0.1MPa、膜面流速3m/s、温度大于70度,此时可以获得平均渗透通量150L/m~2h,但由于酸性条件、高温下肌苷降解,导致肌苷收率有所降低,但仍高于传统肌苷提取方法得到的收率;为进一步提高肌苷得率,缩短提取工序,实验研究了絮凝剂预处理发酵液,解决碱性条件下由于蛋白析出导致膜污染加重的问题,研究表明采用CaCl_2絮凝并调节pH=11,可以获得平均渗透通量为180L/m~2h,肌苷得率大于95%;比较了三种肌苷提取工艺得到的产品质量,采用预处理与陶瓷南京工业大学博士学位论文膜分离结合的除杂工艺得到的粗昔质量与陶瓷膜分离、离子交换及活性炭吸附工艺生产的粗普质量相当,均优于传统的提取工艺;设计了每小时处理12一巧吨肌普发酵液的陶瓷膜成套装置,采用部分内循环的方式降低设备的能耗,简化了肌昔提取方式,提高了产品的收率和得率,由于减少离子交换和活性炭吸附,使得工厂废水排放量降低30一40%,降低酸、碱用量,有利于环境保护。
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Their bacteriostatic activities were tested and the results showed that their bacteriostatic activities against fungus were better than those against bacteria.
初步探讨了所合成化合物的抑菌活性,结果显示所合成的化合物对真菌的抑制活性优于对细菌的抑制活性。
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The bacteriostatic activities of the new compounds were tested, indicating that bacteriostatic activities of them against fungus are better than those of them against bacteria.
抑菌试验显示,所合成的化合物对真菌桔青霉菌)的抑制活性优于对细菌的抑制活性。
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The result of the UCI database experiment demonstrate that the method is better than the Bagging method,and it is very good and useful for classification.
在UCI数据库上的实验结果证明,该方法优于bagging方法,取得了很好的分类识别效果。
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The most important thing is that the flyer velocities are coincident with each other under the same loading conditions, that is, its performance in ballistic curve is better than that of gas gun and detonation driven.
根据测试的数据进一步改进了桥箔板和炮膛的设计,使得在相同加载条件下,飞片的加速历史几乎完全重合,其弹道稳定性优于气炮等加载装置。同时解决了电炮加载下的关键诊断测试技术。
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In this paper, an extended divide and conquer algorithm is intended proposed, which is for solving the real symmetric band generalized eigenvalue problem under distributing environment Eigenvalue partition theorem is presented and proved Based on divide and conquer by extension, this algorithm computes generalized eigenpaires of symmetric band matrix pencil by bisection and generalized Rayleigh quotient iteration Theoretic analysis and numerical results show that this algorithm is better than the classic software package LAPACK when bandwidth is small and the scale is large Combined with multisection, which has good parallelism, it got good effects under distributed environments
提出了分布式环境下计算对称带状广义特征值问题的一种扩展分治算法,给出了特征值分割定理及其证明算法在扩展分治的基础上,利用二分压缩结合广义Rayleigh商迭代计算广义特征对理论分析和数值实验表明,对于窄带宽大规模的广义特征值问题,该分治算法明显优于LAPACK软件包结合并行性好的多分法,在分布式环境下获得了很好的并行效果1 引言本文研究了对称带状广义特征值问题Ax =λBx ( 1)的并行计算,其中,A ,B均为半带宽为r的n阶实对称带状矩阵且其中之一是正定的本文总假设B是正定的求解此问题有两种传统方法,第1种方法是通过计算矩阵B的Cholesky分解,将问题( 1)转化为标准特征值问题[1~3] ,进一步
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The plants treated by color films or traditional shading growed better than that of cultivating bareness, and the effects of different colored film was different.
有色膜覆盖栽培和传统遮荫网栽培的生姜生长势均显著优于露地栽培,但不同颜色薄膜覆盖的效果有显著差异。
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A barleycorn is better than a diamond to a cock.
对一只公鸡来说,一颗麦粒优于一颗钻石。
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Besides, voice language identification results show that PONN method based on barycenter rule outperforms SVM under certain circumstances.
语种识别实验结果也表明基于重心规则的PONN算法在一定条件下优于SVM。
- 推荐网络例句
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Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.
在对危险的南部地区访问时,他斥责什叶派民兵领导人对中央集权的挑衅行为。
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In fact,I've got him on the satellite mobile right now.
实际上 我们已接通卫星可视电话了
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The enrich the peopling of Deng Xiaoping of century great person thought, it is the main component in system of theory of Deng Xiaoping economy, it is a when our country economy builds basic task important facet.
世纪伟人邓小平的富民思想,是邓小平经济理论体系中的重要组成部分,是我国经济建设根本任务的一个重要方面。