数

Study of kinetic antibacterial activities of QJ2 against pathogen W-1 was tested by viable bacteria counts and absorbency at 600nm: 106～ 107 cfu/mL cells of W-1 began to decrease in 15 min after mixing with CFS(cell free-supernatant) of QJ2; the bacterial counts decreased to a minimum at 4h, and the numbers of bacteria began to increase after 6h. The cells of QJ2 did not show any sensitivity to its inhibitory substances in CFS. The size of active molecule in the CFS of QJ2 was smaller than 8000 Da by measuring the inhibitory activities of the fluid inside and outside the dialysis cellulose tubing. QJ2 was identified as Flavobacterium ordaratum by traditional morphological and biochemical method and API-20 identification system.

并对拮抗菌QJ2的拮抗作用进行了研究，结果为：QJ2有广泛的弧菌抗菌谱，对37株弧菌的抗菌阳性率达到89.2%(33/37)；用活菌平板计数法和O.D.600nm研究了QJ2培养物的去细胞上清液与病原菌W-1的作用动力学，15min时W-1的细菌数便开始减少，4h时细菌数最少，6h后开始增加，而对照组的细菌数呈逐渐上升趋势；QJ2对自身的拮抗物质不敏感；QJ2抗性物质的分子量不大于8000Da；经常规生理生化方法和API-20细菌快速鉴定系统鉴定，QJ2为气味黄杆菌。

We deduce frondose algorithm of three layers BP neuralnetworks which is used in common, and discuss several important issues in designing neural networks which is used to forecast, for example, number of hidden layer, nerve cell number of hidden layer, epoch of learning, embryonic power value, decision of node number about input and outputo At the same time, this dissertation sums up things that conventional BP algorithm is improved on considering disadvantages of it.

推导了常用的三层BP神经网络具体算法，讨论了实际预测应用中神经网络设计方面的几个重要问题，如隐层数、隐层神经元数、训练次数、初始权值、输入节点数以及输出节点数的确定。同时，针对传统BP算法存在的各种各样的缺点，文中综述了对其改进的情况。

Participants earned $10 to spend one hour in a soundproof booth while wearing headphones that played a different oice into each ear: one repeating fie digit sequences, the other garbling non sequitors and gibberish.

参与者为了挣10元钱要在一个隔音棚里戴着两只耳朵播放不同声音的耳机：一只耳朵是反复的从一数到五的数数，另一只是断章取义的言语凌乱的东西。

The horizontal and vertical first derivatives of magnetic anomalies of an infinite cylinder are calculated by the cosine transform method, in which the maximum errors are -028 nT/m and 047nT/m, respectively and the percent errors are generally within -357%～327% and -194%～188%, respectively except several data of the boundary and part are bigger because of remains of Gibbus effect. The calculating curve and theoretical curve are approximately coincident, and there is no influence by effective magnetic dip angle in computing.

利用余弦变换法计算的无限长水平圆柱体磁异常水平和垂向一阶导数的最大误差分别为-028 nT/m、047 nT/m；水平一阶导数的误差一般在-357%～327%之间，垂向一阶导数的误差一般在-194%～188%之间；计算的磁异常一阶导数值与理论值大致重合，而且不受有效磁化倾角的影响。

In many cases,even it is very difficult to find out good bounds of the crossing numbers of graphy .

Johnson已经证明确定图的交叉数是一个NP完全问题(见文献[4])，因为其难度，我们能够确定交叉数的图类非常少，在许多情况下，即使找出图的交叉数的一个好的上界或下界也是非常困难。

Within days, the hundreds had grown to thousands, and then tens of thousands, with total strangers forming teams to hunt down the student's identity and address, hounding him out of his university and causing his family to barricade themselves inside their home.

几天之内，数百人增长到了数千人，然后数万人，大量陌生人形成了穷追这个学生身份和地址的团队，把他逐出了他的大学，并导致他的家人躲在他们的家里。

It is to think network advertisement at or surpass traditional advertisement, cheap Mo place does not go to charge; 2 it is Shu of one-sided pursuit impression, impressional Shu is one of levels that measure network advertisement effect, but sometimes one Ge visits Ke Zai a website can produce ten Ge even Shu of two Ge impression; San is to feel integrated big website is straighter than hanging down effect of advertisement of site of is good, but accept the product ad with apparent feature of numerous target group to great majority, this kind of choice is unwise.

一是以为网络广告等于或胜过传统广告，费用低廉无所不到；二是片面追求印象数，印象数是衡量网络广告效果的标准之一，但有时一个访客在一家网站就可以产生十几个甚至二十几个印象数；三是以为综合大网站比垂直站点广告效果好，但对于大多数受众目标群体特征明显的产品广告，这种选择是不明智的。

Historically, plants of this affinity with stamen number equal to sepal number were Ludwigia , and those with stamens twice as many as sepals were Jussiaea , but Raven and others demonstrated reticulate variation in this character, and treated the two groups as a single genus.

历史上，常具有与萼片数相同的雄蕊数的植株为 Ludwigia的，而雄蕊数为萼片的2倍的是Jussiaea的，但 Raven和其它人证明这一特征成网状式的变异，并且把这两个类群归入同一属内。

The analysis of these data shows that in the process of evolution the X chromosomes are as conservative as those in other mammals and the intraspecific and interspecific changes of autosomes follow such a rule:the increase of one chromosome in 2n number is always accompanied by the increase of two acrocentrics and the decrease of one metacentric or submetacentric,and vice versa.

对这些材料所进行的分析表明，鹿属动物在进化过程中，X染色体是很保守的，而常染色体的变化，无论是种间还是种内，全是2n数每增加1条，中部或亚中部着丝点染色体数就减少1条，而端着丝点染色体数就增加2条，反之亦然。

By means of molecular designing, a series of sodium branched-alkyl benzene sulfonates weresynthesized through seven process, involving Frieded-Crafts reaction, Grignard reaction, sulfonationand neutralization. Those isomers have similar structure, carbons of same quantity, but the position ofalkylaryl dissimilarity. Liner fat acid, metaxylene and halogenated hydrocarbon of different carbonnumber were used as the starting materials. Optimum processing condition was confirmed consideringinfluence of a series of reaction factors such as feed proportioning, quantity of catalysts, quantitysolvent, reaction time, temperature and pressure. Eight kinds of isomers of sodium hexadecylxylolsulfonates were finally synthesized, and characterized by FT-IR.

本文通过分子设计，以不同碳数直链脂肪酸、间二甲苯以及不同碳数的卤代烷为原料，经酰基化、格氏反应、加氢还原、磺化及中和等反应，合成了结构相似、烷烃链碳数一定、芳基在烷烃链不同位置的烷基芳基磺酸盐同分异构体；并考察了原料配比、催化剂用量、反应时间、反应温度、溶剂用量、反应压力等一系列因素对各反应的影响，进而确定最佳工艺条件，最终合成出十六烷基二甲苯磺酸钠的八种同分异构体，利用 FT-IR 对产物结构进行了分析。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。