查询词典 D

The characters of the system selects 12 - bit A/D chip converter with high sampling rate and high precision to switch the circuit design. Using multiaddress technology finishes the A/D conversion of the multichannel signal.

本采集系统的特点是选用高采样率高精度的12位A/D转换芯片进行A/D转换电路设计，并采用多路复用技术实现了多通道信号的A/D转换，保证了系统的信噪比，提高了系统的测量精度。

Their seasonal variations were related with vegetation characteristics such as leaf area index and canopy height as well as wind speed.d had a close linear relationship with h,and the variations of Z0 with h could be expressed by quadric curves.d/h and Z0/h were nearly correlated with LAI,and multiple correlation coefficient could be 0.99 and 0.78,respectively.

芦苇湿地的Z0和d的季节变化主要受叶面积指数、株高及风速的影响。d随h的增加而单调增加，Z0随着h的变化遵循二次曲线，d/h、Z0/h与LAI之间的复相关系数分别为0.99和0.78。

Like the above result, any two vertices which are of distance 2 is discussed, then we obtain the following result in this thesis: let G be a graph of order n ≥ 3 such that d + d ≥ [(4n)/3] - 1 where d = 2 in G, then every vertex of G is contained in a 3-cycle.

类似上面结论，我们也只考虑图中距离为2的点对，得到下面结论：若对G中的任意距离为2的点u和v有d+d≥[4n/3]-1，那么G中的每个点都含在一个3圈中。

Let α to be independence number of graph G, in 1984 Fan showed: Let G be a 2-connected graph of order n, for every pair vertices x,y of d=2, if max{d,d}≥n/2, then G is Hamiltonian.

1984年，Fan给出了著名的Fan定理：若2连通n阶图G的距离是2的任意两点x、y均有max{d，d}≥n/2，则G是哈密尔顿图。

Dichlorophenoxyacetic acid (2,4-D), a widely used herbicide, was treated by the ozonization technology in the laboratory.During the 2,4-D ozonization, the main categories of intermediates included chloric aromatics, dechlorinated aromatics and organic acids.Some of these intermediates have relatively high toxicity.Therefore, it is crucial to study the kinetics trend of intermediates diversion.

采用臭氧化高级氧化技术对2，4-D（2，4-二氯苯氧乙酸）污染物进行降解，2，4-D降解过程中会产生含氯芳香中间产物、无氯芳香中间产物和有机酸类中间产物，其中部分中间产物具有较高毒性，因此研究2，4-D臭氧化过程中间产物的动力学变化趋势是非常重要的。

The thesis was designed to optimize the cultures of producing D-LA bySporolactobacillus sp. and analyze the effects on fermentation in order to produceD-LA effectively.D-lactic acid is considered to be a very important chemical compoundas a chiral material or intermediate in organic synthesis. D-LA is a prosoma of manychiral compounds with applications not only in the pharmaceutical and cosmetic industry but alsoin highly efficient and lowly toxic pesticide and herbicide.

本研究的目的是通过对芽孢乳杆菌发酵工艺的研究，建立一条产物光学纯度高、工艺简单，成本较低的D-乳酸生产路线。D-乳酸是重要的手性中间体与有机合成原料，是多种手性物质的前体，广泛应用于制药、化妆品和高效低毒农药及除草剂等领域的手性合成。

In fever model of rats induced by carrageenin, D-KP(2.5、5、10 mg.kg-1) could significantly decrease the high temperature. And in rabbit fever model induced by typhoid vaccine, D-KP(1.25、2.5、5 mg.kg-1) could also decrease the abnormal body temperature.

结果 D-KP（5、10、20 mg.kg-1）能明显延长小鼠热板和热辐射甩尾的痛阈时间；D-KP（2.5、5、10 mg.kg-1）对角叉菜胶诱发大鼠的体温升高、D-KP（1.25、2.5、5 mg.kg-1）对伤寒疫苗诱发兔的体温升高均有明显的降温作用。

Result:The grades of the abilities of mass motor and balance were positively correlated with the A reaction time,total reaction time of Stroop Test,and negatively correlated with the score of down-reciting in Wechsler Memory Scale.The standard score of lack of learning ability or mal-coordination was positively correlated with the D reaction time,total reaction time and the number of D errors and total errors in Stroop Test,and positively correlated with the standard grade in Ravin's Standard Progressive Matrices.The negative correlation was existed between the grade of touch excessive defense,emotionalinstability and the errors in C part and the reaction time in interference of word color in the Stroop Test.

结果：感觉统合功能量表中，大肌肉及平衡能力的等级评分与Stroop测验的A反应时、总反应时呈正相关，与韦氏记忆中倒背数字得分呈负相关；触觉过度防御及情绪不稳的等级评分与Stroop测验的C错误数和色干扰呈负相关；本体感不佳、身体协调不良的等级评分与Stroop测验的C错误数和总错误数呈负相关；学习能力发展不足或协调不良的等级评分与Stroop测验的D反应时、总反应时、D错误数、总错误数以及瑞文标准推理测验的标准等级分呈正相关；大年龄的特殊问题的等级评分与Stroop测验的C错误数、D错误数、总错误数呈负相关。

This article is aimed to study the purchasing and supplier management of D Company. Firstly, sketch a general picture about the environment and current purchasing status for D Company to find out the existing problems among purchasing procedures. Secondly, bring forward the view of supply subdivision model to re-sort material and components, and to take different purchasing strategies per different sorting results.

本文以D公司的采购和供应商管理为研究对象，首先分析了D公司的环境和采购现状，找出了D公司在采购方面目前存在的主要问题，并提出了采用供应细分模型对采购的物料进行重新分类，针对细分的结果对不同的物料采取不同的采购策略。

Each patient had more than two somatic symptoms in the two groups and more than 81.0％ of them had three somatic symptoms. METHODS: According to the different primary diseases in patients of the two groups, regular treatment was given routinely. Oral thymoleptics fluoxetine of 20 mg/d 5-hydroxyltryptamine reuptake restrainer with 20 mg/d was administered, the dose of which could be added to 40 mg/d according to the pathogenetic conditions.

根据两组患者不同原发病，遵循内科疾病治疗常规，予以正规治疗，同时予口服5-羟色胺再摄取抑制剂抗抑郁剂氟西汀，20 mg/d，根据病情可于2周后酌情加量至40mg/d。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。