查询词典 DS

With the wider use of modern electronic war, the technology of anti-jamming communication becomes the sticking point of military command and fight. Because hybrid DS/FH spread spectrum communication systems combine the good features of both direct sequence spread spectrum and frequency hopped spread spectrum , they increase the interference rejection capability of the systems and are regarded as the most lifeful anti-jamming communication systems in the world.

随着现代电子战的广泛应用，抗干扰通信技术成为保证军事指挥和作战的关键，由于混合直接序列扩频/跳频扩频通信系统将直接序列扩频技术与跳频技术结合，集中了直接序列扩频体制和跳频体制的优点，提高了系统的抗干扰能力，成为国内外公认的最富有生命力的抗干扰通信系统。

Of cours e, there are still a lot of ap plications that need to be tai lored specifically to one RDBM S where a tool like MDB just a ds unnecessary overhead and re strictions.

当然，还是有许多程序需要对 RDBMS 进行特殊剪裁，对于这种情况像 MD B 这样的工具仅仅是增加了不必要的额外负担和限制。

The mutation rates were 30% and 25% in LBC and FM,respectively. It was \ mation of infinite life span human cell strain by transfection with v-Ki-ras.Oncogene,1990;5:1415. 6\ Yang D,Louden C,Reinhold DS,et al.Malignant transformation...

这一结果表明p53基因突变在大肠癌中的普遍存在，并在大肠癌的发生过程中起着重要作用；而家族成员中发现p53基因突变将可为癌症的癌前监控和预防提供重要佐证。

Twenty soil samples were taken from a seasonal rain forests and two secondary fo r est dominated by Macaranga denticulata and Mallotus panculatus at the en ds of tw o dry and rainy seasons respectively.

通过萌发实验法对西双版纳地区的一类热带季节雨林和2类次生林的土壤种子库的季节变化进行了探讨。

Chemical constituents of the essential oils of Melaleuca alternifolia were analysed and identified by GC MS DS technique.

采用毛细管气相色谱和色谱－质谱计算机联用系统，分析了互叶白千层精油的化学成分。

We ever reported cellulose is in propyl of Xi of ionic liquid 1-- chloric salt of Zun of 3- methylic Mi (the homogeneous phase acetyl in Am ImC L) converts reaction, falling without activator condition, one pace gets the CA of different DS, get acetone but the CDA[12] of dissolve.

我们曾报道了纤维素在离子液体1-烯丙基-3-甲基咪唑氯盐中的均相乙酰化反应，在无催化剂条件下，一步得到不同DS的CA，并得到丙酮可溶的CDA[12]。

The influence of the use level of base and monochloroacetic acid on the degree of substitution in CMS,the influence of DS and H/Na(ratio of free and salified carboxylic acid in CMS)on swelling and disintegrating of CMS have been discussed.

考察了碱和一氯乙酸用量对CMS取代度的影响及DS和CMS中游离羧基和成盐羧基比对崩解剂吸水溶胀性能的影响。

In this article, high DS and low viscosity carboxymethyl starch was prepared in aqueous media through the reaction between corn starch with acid treatment and etherifying agent, the effect of acid treatment time, liquor/material ratio, the amount of sodium hydroxide, the amount of monochloroacetic acid, etherification time, and reaction tempera.

以玉米淀粉为原料，采用酸化-醚化复合变性的方法在水相中制备高取代度低黏度羧甲基淀粉，探讨了酸化时间、液固比、NaOH用量、ClCH2COOH用量、醚化反应时间、反应温度对羧甲基化过程的影响，研究发现，对原淀粉进行酸化，可以在不增加其它反应试剂用量的基础上提高产物的取代度，但是酸化时间不应过长。

W ith the development and application of computer technology, t here are profound changes in the field of instrument and meas urement. The VI is made up of several hardware functions moul ds, and is organized through software.

虚拟仪器在硬件上由几个功能模块组成，通过软件进行组构，其核心是解决系统硬件与软件的标准化，从而提高系统的互用性，使之更易于集成和应用。

A DS-3P valve controls the hydraulic motor. A multiturn absolute pulse generator is mounted on top of one spindle, and directly coupled to it to prevent any possible backlash in the gears.

DS-3P 阀门控制水力马达。multiturn 绝对脉冲发生器登上在一个纺锤顶部，和直接地被结合对它防止任一可能的后退在齿轮。

Article 144 The Government of the Hong Kong Special Administrative Region shall maintain the policy previously practised in Hong Kong in respect of subventions for non-governmental organizations in fields such as education, medicine and health, culture, art, recreation, sports, social welfare and social

第一百四十四条香港特别行政区政府保持原在香港实行的对教育、医疗卫生、文化、艺术、康乐、体育、社会福利、社会工作等方面的民间团体机构的资助政策。原在香港各资助机构任职的人员均可根据原有制度继续受聘。

Small wonder, then, that the Chinese spend more in the shop than any other group of foreign visitors do .

这样的小惊喜，使中国顾客比任何国家的人消费得更多。