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This paper presents the new bound theorems in structural limit analysis developed on the basis of the generalized variational principle. The approximate limit factors determined from the new bound theorems are closer to the exact limit factor than the ones obtained from the classical bound theorems.

本文给出在极限分析的一般变分原理[1]的基础上发展起来的极限乘子的新的上、下限定理[10]，由这个新的上、下限定理决定的极限乘子的上、下限比经典的上、下限定理给出的更为靠近准确解。

Researches show that the drive force characteristics of the electric tractor drive system based on series DC motor is close the ideal characteristics, the curves are concave, low speed with constant power, and high speed with constant torque; the electric tractor has large working speed under different shifts, but the extensive coincidence speed shows that the variable ratio of the gear is unreasonable; the maximum climbable gradient of this electric tractor is more than 30%, and does not need frequent shift when working for its extensive climbable gradient; there are many influence factors of continuous working time, which the more obvious factors are working speed and working load, the working time increases with the increase of the working speed and working load.2. Simulation researches on the drive characteristic of the electric tractor.

研究结果表明：基于串励直流电动机(来源：ABC21论文网www.abclunwen.com)的电动拖拉机电驱动系统的驱动力特性场接近理想驱动力特性场，其各挡下的驱动力特性是一组下凹的曲线，低速恒转矩，高速恒功率；同一行驶速度下所对应高挡驱动力大于低挡驱动力，这是由电机的调速特性决定的；电动拖拉机各个挡位下具有较广的稳定作业速度范围，但是各个挡位之间速度重合的范围较多，说明所用变速箱变速比与电动机匹配不合理；电动拖拉机最大爬坡度达到30%以上，并且各挡爬坡度变化范围较广，作业过程中不需要频繁换挡；影响电动拖拉机连续作业时间的因素较多，其中作业行驶速度和作业负荷影响最为明显，作业负荷越大，连续作业时间就越短，作业速度越快，连续作业时间就越短。2、电动拖拉机驱动特性仿真研究。

It is certain that creditability in marketing is not built just in one day, and it is determined by the development of the society, the intensive competition in the market and the fast increase in consumers' demands.

当然，诚信营销的产生并不是一蹴而就的，它是由生产力的发展、社会的进步，市场的竞争程度的加剧以及消费者的日益增长的需求等多方面因素共同决定的。

It is indicated that the accuracy of the measured value is determined rather by the practical relative error than by the maximum relative error. It is correct that the nearer the scale reading approaches the maximum, the more accurate the measurement is. The scale reading need not be required above 2/3X.

指出使用电表进行测量时，测量值的准确性是由其实际相对误差而非最大相对误差决定的；并非电表的读数越接近满刻度，测量值的准确性就越高；使用电表进行测量时，电表的读数不必被限定在2/3X上。

Generally, the limiting factor is also the fact that is most deficient for people when they choice a residential space. The limiting factor is a reflection of different demanding for residential space from different people of different social strata, it is acted by social, cultural, economic and environmental factor. Urban residential space structure is according to the limiting factor.

限制性因素所反映的是不同人群、不同阶层的差异性空间需求，它是社会、文化、经济、环境等因素共同作用的结果，城市的居住空间结构是由居住的空间需求——限制性因素所决定的，限制性因素的确定须通过对城市发展背景的分析以及用社会学方法进行差异性需求分析来获得。

During incubations, significant uptake fluxes of NO(superscript - subscript 3) and SiO(superscript 2- subscript 3) were commonly shown at the sediment-water interface, and largely controlled by their concentrations in the overlying water. The molecule diffusive fluxes, calculated from the concentration gradients between overlying water and surface pore water, seemed not so important in the exchange fluxes.

沉积物－水界面交换过程在春季表现为对NO(上标-下标 3)和SiO(上标 2-下标 3)的吸收，吸收的量在很大程度上取决于上覆水中这两种营养盐的浓度；由上覆水和表层间隙水浓度梯度所决定的分子扩散通量对实际交换通量的控制有限。

Renewing the decision taken by our predecessor of happy memory, Innocent, we decree that the ordinances made by the heresiarchs Octavian {2 } and Guido {3 }, and also by John of Struma {4 } who followed them, and by those ordained by them, are void; and furthermore that if any have received ecclesiastical dignities or benefices through the foresaid schismatics, they are to be deprived of them.

革新所作出的决定感到高兴我们的前任的记忆，无辜的，我们的法令，该法令所作的heresiarchs 屋大维（ 2 ）和 Guido （ 3 ），也由 John 的甲状腺肿（ 4 ）谁跟著他们，并通过这些晋牧他们，都是无效的；而且，如果有任何收到教会尊严或benefices通过前述schismatics ，他们被剥夺他们。

The researchers knew that French speakers typically raise their pitch at the ends of words and phrases, while German speakers typically do the opposite.cautions—accents have to do with the ways words are pronounced.

研究者发现法国人会将他们说的最后的单词或是短语的音调提高，而德国人却刚好相反。这明确的认证了口音是由发音的方式决定的。

The apxⅢA gene of Actinobacillus pleuropneumonie was amplified by PCR. The amplified DNA fragment 3 466bp was cloned into pMD18-T. After R.E. analysis and sequencing, the apxⅢA gene in pMD18-T was ligated into pBluescripⅡSK, the recombinant expression plasmid pET-28b/apxⅢA was constructed and analysed with R.E., the protein of apxⅢA gene expressed in E.coli BL21 was detected by Western blotting.

因胸膜肺炎放线杆菌的致病性主要是由毒素决定的，故参照猪胸膜肺炎放线杆血清2型菌株的序列(GenBankL1 2 1 4 5)设计了一对特异性引物，用PCR的方法扩增apxⅢA基因并得到了长 3 466bp的片段，然后将其克隆到pMD 1 8T中，经酶切鉴定和序列分析表明克隆是成功的；再将apxⅢA插入到原核表达载体pET 2 8b后，转化BL2 1 (DE3)，在IPTG诱导下获得高效表达，经Westernblotting检测证实表达产物有活性。

The second attempt of the article is to compare kierkegaard with Marx about the difference and shareness for man.

这种现实性包含人的社会特质、由生产活动决定的人的能动创造性以及人的具体的历史的特性。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。