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The background survey and tracking survey of artificial reef area in Chenghai Laiwu were carried out before and after reefing in 2003 and 2007, respectively. The results indicated that after the deployment of artificial reefs, the biomass density of fishery resources increased by 25.63 times, which were much higher than before. The resources species was much more abundant; total number increased from 23 to 41, which increased by 0.78 times. The crab resources sharply increased by 1.75 times after artificial reef were deployed. Harpodon nehereus and Portunus sanguinolentus , which did not appeared in background survey, now became the dominant species in tracking survey. There were high diversity indexes in artificial reefs area and control area in tracking survey. In conclusion, the results indicated that the fish-aggregating effect of artificial reef site has improved a lot, and the community structure and the habitat environment have been significantly improved.

摘 要:2003和2007年分别对澄海莱芜人工鱼礁区进行了投礁前的本底调查和投礁后的跟踪调查,结果表明,投礁后礁区海域游泳生物的资源密度明显比投礁前高,增加了25.63倍;礁区海域各类资源种类均比投礁前丰富,总种数由投礁前的23种增加至41种,比投礁前增加了0.78倍,其中,蟹类种数增加最多,增加了1.75倍;在本底调查中没有出现的经济种类龙头鱼 Harpodon nehereus 和红星梭子蟹 Portunus sanguinolentus 在跟踪调查中已成为主要优势种;Shannon-Wienver多样性指数在礁区和对比区均比投礁前有所增加。

The control system of NC drilling machine which takes the PLC as the main controller is used in drilling machine. It controls the aiguille moving from one positioning to another positioning relative to the positioning of the workpiece. The system consists of PLC, stepper motor driver, stepper motor, HMI, and so on.

摘 要:数控钻孔机控制系统是用在孔加工机床上,以可编程序控制器为主控制器,控制钻头相对于工件的定位,由一个定位点向另一个定位点的控制系统。

Direct air cooled condenser is composed of individual direct air cooled units.

摘 要:直接空冷凝汽器由一个个直接空冷单元组成。

The androecium were consisted of 3 stamens,two of which were connate ,separating or partial combination.

摘 要 对南瓜的两性花进行外部形态及结构的研究,结果表明:南瓜的两性花可有子房上位花、子房半下位花和子房下位花三种类型:花萼、花冠均为5,合瓣;雄蕊3,其中有两枚各由两个雄蕊合生而成,分离和部分联合,花药结构特殊,花粉发育正常;雌蕊具有单个或两个柱头及花柱。

Electroless Co-Ni-P thin film as-deposited was amorphous possessing smooth surface. The film was crystallized after heat treatment at 300℃ for 1 hour, and the surface of film was composed of "taper humps". When the film was heated, phase of Co2P deposited from the solid solution and allotropic transformation took place from hexagonal close-packed system to face-centred cubic lattice.

摘 要:化学镀Co-Ni-P薄膜镀态下为非晶态结构,表面较为平整;经300℃×1h热处理,发生了晶化转变,表面由"圆锥峰"所构成;随加热温度的提高,镀层析出了Co2P相,并发生了由密排六方结构的α-Co向面心立方结构的β-Co的同素异构转变。

Next the MCU control the interface circuit of telephone to accomplish simulated off-hook, then auto-dial by dial-up circuit of DTMF, and play the phonetic information which has been recorded beforehand by phonetic circuit, to tell the user of the emergency which has occurred so that they can take corresponding step on time.

当红外探测器检测到警情的时候,就会向单片机发出中断请求,再由单片机控制电话接口电路,实现模拟摘机,通过 DTMF 拨号电路实现自动拨号,并由语音电路通过电话完成播放预先录制好的语音信息,实现语音报警,来通知用户发生警情,以便让他们及时的做出相应措施。

The spore germination and gametophyte development of 21 ferns are studied. It indicates that :① the development period of prothallium and young sporophyte of the same species is different due to seeding time of spores;② the optimal temperatures of spores germination and gametophyte development of 21 ferns are about 15 -24 ℃;③ the rate of spore germination of rare ferns is much lower than the ferns which occur large populations in nature;④ the treatment with GA 3 can accelerate the germination of the spores;⑤ the prothallium changes from large to small, green to yellow when young sporophyte comes out. The prothalliums of all 21 ferns die away after the appear of the 3rd leaf of sporophytes;⑥ shapes of the 1st and 2nd leaves of the young sporophyte are different from those emerged later;⑦ spores cultured in dark can not germinate;⑧ a prothallium can develop only one young sporophyte though it has many archegoniums, and the spore propagation with leaf mould substrate is an economical method.

摘 要:以腐叶土为培养基质,对 21 种蕨类植物进行了孢子萌发和原叶体发育的研究,结果表明:①不同时期播种的同种蕨类的孢子,发育出原叶体和幼孢子体所历经的时间长短不同;②孢子萌发和配子体生长发育的适宜温度约为 15 ~ 24 ℃;③稀有蕨类的孢子萌发率低,而在野外能形成较大种群的蕨类的孢子萌发率高;④用 GA 3 处理孢子可以促进萌发;⑤当原叶体上长出幼孢子体时,原叶体由大变小,由绿变黄, 21 种蕨类的原叶体都在幼孢子体上长出第 3 片叶时消失;⑥幼孢子体上长出的第 1 、 2 片叶在形态上与以后长出的叶不同;⑦孢子萌发需要光;⑧ 1 片原叶体尽管有多个颈卵器,但仅发育出 1 株幼孢子体;⑨利用腐叶土进行蕨类孢子繁殖是一种经济实用的繁殖方法。

Electroless Co-Ni-P thin film as-deposited was amorphous possessing smooth surface. The film was crystallized after heat treatment at 300℃ for 1 hour, and the surface of film was composed of "taper humps". When the film was heated, phase of Co2P deposited from the solid solution and allotropic transformation took place from hexagonal close-packed system to face-centred cubic lattice.

摘 要:化学镀Co-Ni-P薄膜镀态下为非晶态结构,表面较为平整;经300℃×1h热处理,发生了晶化转变,表面由&圆锥峰&所构成;随加热温度的提高,镀层析出了Co2P相,并发生了由密排六方结构的α-Co向面心立方结构的β-Co的同素异构转变。

The self-propelled "TPC" rice combine harvester "4ZTL-1800" Invented by Professor Jiang Yiyuan (Academician of Chinese Academy Engineering) performed well in immediately cutting and windrowing the straw after stripping in front of the crawler.

由蒋亦元教授发明的4ZTL-1800型自走式割前摘脱稻联合收获机可以实现对谷物割前摘脱的同时将脱粒后的秸秆在被行走装置压倒之前进行切割并搂集成条铺。

Methods 37patients with complicated dentition defect that can't use traditional removable partial denture were involved in the study.

选择37例因传统可摘局部义齿无法戴用或对此类修复体效果不满意的复杂牙列缺损患者,附着体义齿修复前首先请患者对现有可摘局部义齿就咀嚼功能恢复、舒适度、发音与美观3个主观项目进行评价,其次由修复科医师对义齿的固位情况、对基牙的影响、对口腔卫生的影响3项客观指标进行评价,并在附着体义齿修复后1~5年再对上述6项指标进行评价。

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推荐网络例句

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时,他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了

The enrich the peopling of Deng Xiaoping of century great person thought, it is the main component in system of theory of Deng Xiaoping economy, it is a when our country economy builds basic task important facet.

世纪伟人邓小平的富民思想,是邓小平经济理论体系中的重要组成部分,是我国经济建设根本任务的一个重要方面。