In order to finding the best structure of fleets , the nonlinear optimization method is adopted in chapter five , studying distributing ships for certain navigation line 木淪義汁次將幾川十船w選優(yōu)方刑,通過(guò)對(duì)單船和船隊(duì)兩利叫訃、汀比狀忐1八喉
Radar echoes include echoes of lands , islands , all kinds of moving targets , racon , sart and sea , etc . arpa marks consist of fixed range marker , variable range marker , electronic bearing line , guard zone , heading - line , parallel index ( 4 navigation lines ) , vector lines ( or pad ) and past track information of tracked target ships , marks of trial manoeuvres , ect 雷達(dá)回波包括陸地、島嶼回波,各種活動(dòng)目標(biāo)的回波,雷康、 sart回波,海雜波等。 arpa符號(hào)包括包括固定距標(biāo)圈、活動(dòng)距標(biāo)圈、電子方位線、警戒圈、船首線、 pi線、已錄取目標(biāo)的矢量線以及歷史航跡(或pad ) 、試操船符號(hào)等。
Highway : it is an intersetion of weiwu expressway ( nationhighway ) , pengshui highway , muhuang highway ( bothprovincialhighways ) and pengfeng highway ( town - levelhighway ) . itisalso connected with jiqing , tongsan expressways as wellas the expressway network in three provinces in northeast china through penglai ? dalian ro - ro navigation line . the transportation is quite convenient 公路? ?國(guó)道威烏高速、省道蓬水路牟黃路、縣道蓬豐路在此交匯,連接濟(jì)青高速、同三高速,通過(guò)蓬(萊)大(連)滾裝航線與東北三省高速公路相接,形成四通八達(dá)的公路交通網(wǎng)。