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One popular teen-agers' Halloween trick was to unroll a roll of toilet paper and throw it high into a tree again and again until the tree was all wrapped in the white paper.

一种流行的十几岁的孩子'万圣节诀窍是摊开的卫生纸卷,将其投入高的树上,直到再树又是所有包裹白皮书。

My first year with Roridula gorgonias on a south facing window sill worked quite well, but in the second winter the plant was to big and I moved it to an east facing window.

第一年种植Roridula gorgonias时,我将其放置在朝南的窗户旁,效果相当不错,但是第二年冬季,捕虫树因为太大了,所以将其移植到朝东的窗户旁。

It includes two aspects in content: one is the best choice for plane disposal of pipeline, and its methods follows as decision-making plot, simple trapeziform and optimizing trunkform etc; the other one is optimizing pipe parameter when the plane disposal of pipeline has been fixed, and the methods of which are linear programming, unlinear programming, dynamic optimizing, direct optimizing, hereditary arithmetic and so on.

污水管网优化设计包括两个方面的内容:一是管线平面布置的优化选择;其方法有:决策图法,简约梯度法,优化树法等。二是在管线平面布置已定情况下进行管道参数的优化;其方法有:线性规划法,非线性规划法,动态优化法,遗传算法,直接优化法等。

For preparing for the researches of text digital watermarking and advantaging other researchers" development when using the Chinese mathematical expression theory, this paper designs and realizes a development platform of Chinese mathematical expression. It has been proved by experiments that the platform"s function, execution speed and stability can satisfy the requirements of conversion and operation of enormous data.This research found out that the structure information of Chinese have plenty redundant information that can be used by the Chinese mathematical expression for the digital watermarking, the data embedded can possess better robustness. Based on this finding, this paper designs a kind of text digital watermarking method of embedding watermarking by using Chinese structure, and realizes the method by using the Chinese mathematical expression platform.Considering the watermarking embedding algorithms importance to the robustness of the text digital watermarking, this paper makes fully use of the advantage of the Chinese mathematical expression theory to design a kind of layered text method, which has being realized by using the Chinese mathematical expression platform. The layered text method can handle the text as a solid structure, and the embedding data havepreferable robustness.Finally, based on the researches of the text digital watermarking method and the text layered method, this paper integrates the method of making use of the Chinese structure embedding watermarking with the robust algorithm based on text layered, and realizes a brand-new text digital watermarking method. Proved by lots of experiments, this brand-new method has good robustness and better invisibility.

为了为研究工作做准备和方便其他使用汉字数学表达式理论体系的人进行开发,本文基于汉字数学表达式理论设计实现了一个汉字数学表达式平台,实现了Unicode汉字集中的汉字、汉字数学表达式、汉字的Unicode码之间的相互转化、依据汉字数学表达式提取汉字的结构信息、由汉字数学表达式在非中文平台上不依赖字库显示汉字的图像等功能,使用复合文档技术和流压缩技术进行数据的存储,使用对汉字数学表达式进行二叉树拆分来处理汉字数学表达式中包含的信息,使用自定义哈希函数来提高运行速度,实验证明,该平台功能、速度和稳定性完全能满足大量数据的转化和运算要求;通过研究表明汉字的结构信息中存在大量可使用汉字数学表达式理论加以利用的水印加载空间,加载在该空间的数据可以具有较好的鲁棒性,基于此,本文设计了一种利用汉字结构加载水印的文本数字水印方法,并使用汉字数学表达式平台将其实现;由于水印嵌入算法对于文本数字水印的鲁棒性至关重要,本文充分利用汉字数学表达式理论的优点,设计了一种文本分层的方法,并使用汉字数学表达式平台将其实现,使文本成为一个立体的空间,使嵌入在其中的数据具有更好的鲁棒性;最后在基于汉字数学表达式的文本数字水印嵌入方法的研究和基于汉字数学表达式的文本分层方法的研究的基础上,结合利用汉字结构嵌入水印的方法和基于文本分层的抗攻击文本水印嵌入算法实现了一种全新的文本数字水印方法,经实验证明,该方法有良好的鲁棒性和较好的隐蔽性。

As the temperature falls, snow gets drier and fluffier because of the formation of dendrite crystals that contain lots of spaces.

而当其温度下降,雪就会越来越干和越来越松软,这是因为其所形成的树状晶体含有很多空隙。

Primarily, one should note that myrrh and frankincense grow together in the same parts of Arabia and Africa, and although the trees are husbanded differently their precious products are collected in similar ways.

其主要内容之一,应该看到,没药和乳香一起成长,在同部分阿拉伯及非洲,虽然树是husbanded不同,其珍贵的产品都凝聚在以类似的方式。

Bioinformatics was used to seek the homologous gene of EXT1 in Strongylocentrotus purpuratus which was just discovered and had the correlation to human hereditary multiple exostoses. The sequence, exons, coding protein, physical and chemical characters of EXT1 gene were analyzed. The structure and function of its coding protein were predicted, and the phylogenetic tree for the homologous gene was constructed, which provided certain basis for the future research of human EXT1 gene.

利用生物信息学方法寻找人类遗传多发性外生性骨疣EXT1基因在紫色球海胆中的同源基因,对该基因的序列、外显子信息、编码蛋白及其理化性质进行分析,并预测其编码蛋白的结构与功能,构建其同源基因的系统进化树,旨在为进一步研究人体EXT1基因提供一定的依据。

First, the stations'timing process and the slot aligning are discussed. Second, the dissertation propose a resource request random access method based on feedback. The performances of this method are analyzed. Third, proceed from the considerations of the MAC protocol for the HFC system, a QOS-oriental scheduling algorithm for the MAC protocol based on dynamic TDMA is proposed. Simulation results show that the performance of this algorithm is better than that of the first come first service. Forth, two contention resolution algorithms ----p-persistent CRA and tree CRA, which are usually adopted in the HFC system, are summarized. The delay and characteristic are compared. At last, the dissertation introduces the function implementation of the MAC layer based on COM21 UPSTREAMS.

首先,讨论了基站的同步进程和时隙同步的实现;然后,本文提出了一种带反馈模块的资源申请信号随机接入方法,并对其进行性能分析;然后,从HFC系统的MAC协议出发,提出了一种用于基于动态TDMA技术的MAC协议的业务安排算法,计算机仿真结果表明其性能优于先到先服务法的性能;然后概述了常用于HFC系统的两种冲突解决算法——p-坚持冲突解决算法和树型冲突解决算法,比较两者的时延性能与特征;最后,介绍了基于COM21 UPSTREAMS协议的MAC层功能实现,给出了硬件框图和照片。

His unique style of painting is coming from his diligent, study-loving spirit since his young period.

何氏自小就展露其主动求知,即知即行的好学精神,他的画风能独树一格、独领风骚,其来有自。

Based on these modifications, we have reimplemented our OGtree as a new web server OGtree2.0 and have also evaluated its accuracy of genome tree reconstruction on a testing dataset consisting of 21 Proteobacteria genomes.

根据上述的改变,我们将OGtree改版为一个新的网路伺服器叫做OGtree2.0,并且利用二十一条蛋白细菌染色体去建构其演化树并用其结果来衡量OGtree2.0的正确性。

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As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸,那乌黑、忧郁的眼睛,她便会相信,他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失

But because of its youthful corporate culture—most people are hustled out of the door in their mid-40s—it had no one to send.

但是因为该公司年轻的企业文化——大多数员工在40来岁的时候都被请出公司——一时间没有好的人选。