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Single crystals of compounds 1, 2 and 3 were grown and their crystal structures were determined by a single crystal diffraction technique.

培养了化合物1， 2， 3的单晶，并用X射线衍射法测定了它们的晶体结构。

This paper makes further research on the error,caused by use of a single step or a variable step of Runge Kutta to solve the Euler equation of quaternion method, find that the large error results from cumulated error with single step, and when using the variable step,the cumulative error is less.

结果表明，定步长时有很大的累积误差，单位四元数的"单位"性不能得到满足，而变步长有明显的改观，对一般的飞行模拟状态，都能得到较好的模拟结果，可以在实际中使用。

There isn"t obvious selectivity in blank cutworm imperilment, the onseting quantity and imperilling degree is similar on different crops. It"s more serious in the field of invasion of weeds and corn intercrop potato than single cropping of corn, and the field of forecrop green manure is more serious than single cropping. Imperilment degree of black cutworm is very serious in both high altitude region as Dewu (1780 meters) and low altitude region as Lemin (1450 meters). The imperilment degree in two regions have no obvious differences. 4. The imperilment of second generation armyworm is very serious in both high altitude region of Dewu and low altitude of Lemen town.

3小地老虎的为害对品种没有明显的选择性，各品种小地老虎发生量和受害程度相似；作物对小地老虎发生为害程度影响较大，杂草丛生的地块和玉米与马铃薯间作的地块受害程度明显高于玉米净作地块，而前作为绿肥的地块受害程度也比净作高；土壤条件对小地老虎发生为害程度有影响，土质疏松、肥沃、团粒结构良好的地块受害程度明显比地势低洼、土质粘重、瘠薄的地块重；小地老虎在高海拔的德坞(1780米)和低海拔的乐民(1450米)两地发生为害均较重，为害程度没有明显差异。

Martensia was characterized by either single or multiple network-banded blades, procarps consisting of a four-celled carpogonial branch flanked on one side by a single lateral sterile group and on the other side by a group of cover cells, and cystocarp scattered over fertile blades.

此属的特点为藻体膜叶状且膜叶具有单或多层的网状结构，其雌性殖果孢枝特化具有侧边单一的不孕枝而另一边有一群覆盖细胞，果孢子囊散生在藻体各处。

This paper introduces a single-carrier system with hybrid time-frequency domain Decision Feedback Equalization, in which the short pn (Pseudo-Noise) sequence with fixed waveform replaces the cyclic prefix in the conventional Single Carrier systems with Frequency Domain Equalization, and the long PN sequences composed of several short pn sequences are employed as the channel training sequences to complete the initial estimation and tracking for fast-varying channel.

摘要该文设计了一种联合判决-反馈均衡的单载波频域均衡系统，该系统用固定波形的短pn序列取代常规SC-FDE系统中的循环前缀，并以多个短pn序列组成的长PN序列作信道训练从而解决快变信道的初始估计和跟踪问题。

Purpose: To evaluate whether a single-breath hold and single-level test bolus-injection dynamic scanning was a good way of defining the portal contrast media peak time and its preliminary application with spiral CT portography.

目的 ：探讨一次屏气试验剂量团注单层动态扫描是否能很好确定门脉造影剂峰值及其在SCTP成像中的应用价值。

In view of the single invalid data of the optoelectronic deflection meter system in the engineering practice of the bridge structural health monitoring system, which bring the illusive alarm and can not be identified by the traditional methods of signal processing and data analyzing,the paper analyses the characteristics of the single invalid data, and formalizes and describes them.

针对在大型桥梁结构状态监测系统工程实践中，光电挠度测量系统采集的数据中存在的较多单点失真数据无法使用传统的信号处理与数据分析方法过滤的问题，本文在连通管式光电挠度测量系统原理基础上，深入分析了系统中单点失真数据的特点，对单点失真数据进行形式化描述和说明，从而提出了一种基于数据速率变化来过滤单点失真数据的滤波方法。

In order to damp the effect of aggressive characteristic of the drivers, the change with time rate of the desired velocity of a single deriver is approximately taken place of the adaptive function in the reduced Paveri-Fontana equation which describes that the instantaneous desired velocity of a single deriver arrives at the deriver' self-equilibrium velocity in the relaxation time.

适应性公式表明单一司机的期望速度在一定的驰豫时间内达到司机的自平衡速度，也就是当交通流处于平衡状态时，个体司机达到的期望平衡速度。

DESMA offers a wide range of rotary and single station machines for direct injection, unit soles, PU boots, and technical products. With DESMA'S state of the art mixing technology, the customers can choose from a variety of soling materials, such as single / two density PU, TPU, TR and Rubber, it also gives the customers the choice to combine two or more of the afore mentioned soling materials.

德士马提供旋转机台和单个机台的系列产品，用于连帮注射，生产鞋底，PU靴以及工业产品，运用德士马混合工艺技术，客户在鞋底原料方面有一个多样的选择，例如：单密度/双密度PU，TPU，TR和橡胶，同时客户也可以选择将之前提到的两种或者更多鞋底原料组合起来。

Nor does a single legal norm lose its validity if it is only exceptionally not effective in single cases. On the other hand, a legal norm may lose its validity by never obeyed, applied or executed – by so-called desuetude or permanently unexecuted.

当整个法律秩序失去实效时，这个法律秩序和每个单个的法律规范也就失去了效力；当一个单个的法律规范失去实效的时候，整个法律秩序并不失去效力；如果单个的法律规范只是作为例外在个别情况下失去实效，那么这个规范并不失去效力；如果单个的法律规范永久失去实效，即它从未被遵守、适用或者执行，它会因废弃或永久不被执行而失去效力。

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。