Results PCR, restriction endonuclease method and direct sequence analysis demonstrated that plasmids of YMDD, YVDD and YIDD were constructed successfully.
结果经pcr方法、酶切鉴定及直接测序鉴定出YMDD、YVDD和YIDD质粒构建成功，且该方法具有较好的敏感性和特异性。
Based on the mechanism of direct sequence spread spectrum (DSSS), an analysis is made of the anti noise capability of the DSSS and its advantages and disadvantages are proposed.
在直接序列扩频机理的基础上，就其抗干扰能力给出了理论分析，并指出其优点及不足之处。
Based on the mechanism of direct sequence spread spectrum (DSSS), an analysis is made of the anti noise capability of the DSSS and its advantages and disadvantages are proposed.
在直接序列扩频机理的基础上，就其抗干扰能力给出了理论分析，并指出其优点及不足之处。
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