1)  DCA
DCA
1.
The configuration of the port of maintenance and the DCA of H 20-20;
H20-20的DCA与维护管理端口的配置
2.
Application Research of DCA in the Processing of DNA Sequences;
DCA在DNA序列处理上的应用研究
3.
Research on a Novel DCA Scheme in TD-SCDMA System with HSPDA;
应用HSDPA的TD-SCDMA系统快速DCA算法研究
2)  DCA
DCA排序
1.
In order to probe into the range of distribution of the shrub species in the ecotone between the loess hilly area and bedrock area in the Zhongyang county of west Shanxi province,the niche breadth(Levins,Shannon-weiner index),niche overlap(pianka,simple Morisita) and Detrended Correspondence Analysis(DCA) of 29 species were calculated in this paper.
应用Levins和Shannon-weiner生态位宽度指数,以及Pianka生态位重叠指数、简化Morisita生态位重叠指数对晋西黄土区和土石山区交错地带29个主要灌木树种的生态位特征进行了研究,并对各树种的DCA排序分析结果与生态位特征进行了对比分析。
2.
By using the niche breadth,niche overlap,and TWINSPAN,DCA,The gradual change of the dominant species niche in the process of vegetation restoration,the role of the dominant species in communities and the relationships of communities have been studied.
通过生态位宽度与生态位重叠指数 ,结合 TWINSPAN分类与 DCA排序 ,研究植被恢复过程中优势种生态位的梯度变化 ,以及这些种在不同群落类型中的地位、各群落之间的关系 。
3.
The features of pollen assemblages are dealt with in this paper using the methods of DCA and correlation analysis.
花粉百分比含量DCA排序与相关分析发现 ,荒漠区不同植物群落下表土花粉组合特征各不相同 ,而且与相应的植物群落及其所代表的环境特征相一致。
3)  DCA
动态信道分配
1.
The invading terminal problem in Ad Hoc network under multi-channel environment is discussed,and a new access protocol based on DCA protocol is introduced by absorbing some good ideas of other MAC protocol.
即在原有的动态信道分配MAC层协议基础上,增加了对入侵终端发生情况下信道重新分配机制和链路重新建立机制。
2.
Dynamic channel allocation(DCA) is generally for reducing intercell interference.
针对TD-SCDMA系统的这一特点,提出了一种对原有动态信道分配(DCA)方法的改进方法。
3.
Dynamic Channel Allocation (DCA) technology is one of the key technologies in the TD-SCDMA system, which has been putted forward based on the real conditions and the development trend of the communication service, can not only allocate the channel resou.
动态信道分配(DCA)技术是TD-SCDMA系统中的一种关键技术,它从业务服务的实际情况和趋势出发,更合理地分配信道,缓解频谱资源的紧张状态。
4)  DCA
无偏对应分析
1.
in Fanjing Mountain of Guizhou was investigated by means of TWINSPAN and DCA.
通过使用双向指示种分析(TWINSPAN)和无偏对应分析(DCA)两种方法进行研究的结果表明,梵净山树干附生尖叶拟船叶藓在群落水平上的分布与森林群落类型相对应,其所在群落可以分成贵州青冈-箭竹群落、贵州青冈+巴东栎+雷公鹅耳枥-箭竹群落、贵州青冈-短柱柃群落、大钟杜鹃+多脉青冈-野八角群落、亮叶水青冈+多脉青冈+贵州青冈-箭竹群落和贵州青冈-尖叶山茶-野八角群落6类树附生苔藓植物群落类型。
5)  DCA
除趋势对应分析
1.
Based on 75 recorded moss species and their coverage,Two-way Indicator Species Analysis (TWINSPAN) and Detrended Correspondence Analysis (DCA) were used to analyze their distribution patterns.
基于 75种记录的藓类植物及其盖度数据 ,应用双向指示种分析法 (TWINSPAN)和除趋势对应分析 (DCA)分析其分布格局 。
2.
TWINSPAN and DCA were adopted to analyze their distribution pattern on the basis of their degrees of coverage.
根据盖度值应用双向指示种分析法(TW IN SPAN)和除趋势对应分析(DCA)对其分布格局进行了分析。
6)  DCA
数据通信适配器
1.
Along with the technology improvement,the DCA adapter used by switches is gradually out of service.
随着设备的改进,交换机所配置的数据通信适配器(DCA)已闲置,能否利用DCA与电脑连接,实现交换机的告警实时监视,是非常有意义的。
参考词条
补充资料：3,5-DCA
分子式：C6H5Cl2N
分子量：162.02
CAS号：626-43-7

性质：白色至浅黄色针状结晶体。熔点51-53℃，沸点260℃（98.8kPa），闪点133℃，相对密度1.58。不溶于水，溶于醇、醚、氯仿和苯。常温下淡粉红色固体。溶解度：水中0.6g/l 26℃，正己烷中26.8g/l 20℃。能升华。

制备方法：1.3,5-二氯硝基苯加氢法2.多氯苯胺脱氯加氢法3.碘化氢脱氯法4.氨解法由1,3,5-三氯苯（或1,2,4-三氯苯）氨解制得。5.脱羰基法由3,5-二氯苯甲酰胺脱羰基制得。6.2,6-二氯-4-硝基苯胺法以2,6-二氯-4-硝基苯胺为原料，经重氮化、加氢制得。7.乙酰苯胺法以乙酰苯胺为原料，经氯化、水解后制得混合2,4和2,6-二氯苯胺，再经溴化、重氮化后，制得3,5-二氯溴苯，再经氨解制得产品。8.由对硝基苯胺（或邻硝基苯胺）经氯化、重氮化（脱氨基）、还原而得。此外，由对二氯苯（或邻二氯苯）经溴化、异构化、氨化也可制得3,5-二氯苯胺。

用途：用作农用杀虫剂的原料，由它可制得二甲菌核利、菌核利、乙烯菌核利、菌核净、异菌脲、乙菌利、氯苯咯菌胺和甲菌利；还可用于合成除草剂、植物生长调节剂。医药工业用于制造治疗疟疾病的喹啉衍生物。染料工业用于制造偶氮染料和颜料。在工业卫生方面用于制造杀虫剂和有害生物驱除剂。

说明：补充资料仅用于学习参考，请勿用于其它任何用途。