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Ammoniac nitrogen reduce to the standard (15mg/L) in less than 3 years in the condition of lesser hydraulic loading ,but in the conditions of larger hydraulic loading and times of recycling , it may take 10 years or so .
由此表明,准好氧填埋场自身的净化处理功能是十分强大的,采用恰当的水力负荷和回灌次数可以解决渗滤液中氨氮难降解的问题。
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I am blind of a computer actually, the major that learns in the university is literature, be being contacted with computer at ordinary times also is to stay in game of QQ, network, forum nevertheless above, know the professional thing such as what HTML, ASP far from, even I won't use a few more commonly used office software, dye-in-the-wood computer is analphabetic.
我其实是一个电脑盲,在大学里学的专业是文学,平时跟电脑接触也不过是停留在QQ、网络游戏、论坛上面,根本不懂什么HTML、ASP等专业性的东西,甚至一些较常用的办公软件我都不会用,彻头彻尾的电脑文盲。
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With common pakchoi as the material, they were soaked in mixed solution with 1000 times of methyl parathion, dimethoate, dichlorvos, pyralid treat phosphorus, poison-to-death barnyard grass and fenvalerate for 1 min, and then they were saved in CW(25℃, humidity 55%RH), LC(4 ℃, humidity 60%RH) and DW (-24 ℃, humidity 70%RH) after air dried. After saved for 0, 24, 48 and 72 h, the samples from which were taken to determine the residual quantity of pesticides in pakchoi of different treatments.
方法]以普通小白菜为材料,将其在1000倍甲基对硫磷、乐果、敌敌畏、治螟磷、毒死稗和氰戊菊酯的混合稀释液中浸泡1 min,取出晾干后分别在CW(25℃,湿度55%RH)、LC(4℃,湿度60%RH)和DW(-24℃、70%RH)条件下保存,0、24、48、72 h后分别取样,测定各处理小白菜中农药的残留量。
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In this paper it analyzes the execution process of SQL statement in Oracle database and finds out that reducing times of SQL statement parsing and optimizing CBO are the emphases of SQL performance tuning.Then it validates the key role of using bound variable and cache cursor in enhancing performance of SQL with example.
从分析ORACLE数据库中SQL语句执行原理入手,指出减少SQL语句的解析次数和优化CBO是SQL性能优化的重点,并用实例验证了使用绑定变量和高速缓存游标在提高SQL性能方面的重要作用。
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Classical heaviness and an old book store in a certain bystreet within Paris where a familiar relics of poems are read our longing for the nature positioned in memories of our past is expressed in peace and freedom just like stop of flows of times.materials of motif introduced from the nature,which are felt more comfortable under warm sunrays in afternoon,are similar to unique sturdiness and shapelessness and provide convenience together with neutral colors.
在巴黎街道一个有着拿破仑时期典型装饰的老书店里面自在而平静的读着熟悉而久远的诗歌,它勾起了我们记忆深处对大自然的渴望,如同淅淅沥沥流过的时间之水。周围那些以大自然为主题的建筑物在午后温暖的阳光下显得更加生动,虽然他们笨拙而造型感不强烈,却为人们提供了方便和良好的视觉享受。
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The relationship between in situ target strength and depth of chub mackerel was established by selecting the length composition of mackerel was larger than 90%. Results showed that the in situ target strength of chub mackerel was changed significantly depend on depth up to 8.7 dB. And it indicated that the measurement of in situ target strength of fish with swim bladder should be modified by the relationship of target strength and depth, especially in chub mackerel, it may be led to overestimate the standing crop to 7.4 times of the assessment.
将科学鱼探所收录到的白腹鲭声学资料使用线性回归来检定现场标物反射强度与样本所在水深关系,检定结果显示出白腹鲭在不同水深时所反射的现场标物反射强度均会随著深度改变,并且呈现负相关的显著水准(p.01),现场标物反射强度变动有8.7dB差异量,对白腹鲭鱼群现存量会超估7.4倍的差异。
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to reduce the impact of carrier frequency offset in ofdm system,this thesis designs a new carrier frequency offset estimation scheme for ofdm system.the carrier frequency offset estimation includes acquisition and tracking.we adopt variable step size adaptive algorithm.the acquisition range of the proposed algorithm is as large as one half of the overall signal bandwidth.through this method we can not only avoid the feedback by using forward error correction,but also reduce the times of complex multiplication in order to reduce the power consumption of the system.this algorithm not only has low complexity and fast convergence nut also can improve the demodulation performance of ofdm system.computer simulation illustrates the superior performance of the proposed algorithm with regard to estimation accuracy in both awgn channel and multi—path channel.
摘 要:为了减小正交频分复用系统受频率偏差的影响,在ofdm系统中设计了一种新的载波频偏估计算法。频偏估计包括跟踪和捕获两个阶段,文中采用变步长自适应算法来进行跟踪,这个跟踪算法的捕捉范围是整个信号带宽的一半。通过此方法,不但可以利用前向纠错的方式来避免反馈,而且可以缩减复数乘法的次数以降低计算复杂度和系统功耗。该方法运算复杂度低,并具有较好的收敛性,能改善odfm的解调性能。从计算机的仿真效果可以看出无论是在awgn信道上还是在多径信道上都表现出了卓越的性能。
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Because of inappropriate operation between oncoming straight and left-turn vehicles of signalized intersections of urban areas in Taiwan the department of traffic ever offered corrigible opinions involve in right of way, center of intersections adjudging hard and indirectly encouraged to accelerate left-turn vehicles. But all still lack quantification analysis. Therefore, this problem is worth studying.This study will aim at safe passage of oncoming straight and left-turn vehicles for at-grade signalized intersections. So, this study will be based on row's theory, theory of traffic conflicts, and take many factors into consideration, such as the width of the intersections, types of the intersections, center of the intersections, the size of the vehicles, the location of the vehicles, the radius of turn, paths of operation, the speed of the vehicles, the types of collisions, the angle of road, and also deduce formulas of coordinate of paths. The main method used in this research is the simulation of different situations. By the method, the analytic model of safe passage of oncoming straight and left-turn vehicles for at-grade signalized intersections will be established, and this study will also subsume critical speed of conflict and expected number of times of safe passage. Finally involved rules of safe passage will be proffered.
鉴於台湾都市地区路口对向直行左转车辆常遭受对向车辆不当驾驶行为干扰,因而道路交通主管机关曾针对路口对向直行左转相关道路交通法规可能产生之对向直行左转路权判断不易、路口中心处不易区分、间接鼓励路口转弯车加速左转等问题提出检讨之修正意见,唯整体考量仍缺少〝量化〞分析,系一值得研究之课题,因此,本研究将针对号志化平面路口对向直行左转车辆安全通行问题於法规层面上之特殊性,以交通冲突理论、路权理论为基础,并考量路口宽度、路口型式、路口中心处、车辆尺寸、转弯半径、运行轨迹、行驶速率、行车位置、最终碰撞型态、道路交角等因素,先行推导车辆行驶轨迹座标公式,再利用情境模拟分析法,进行号志化平面路口对向直行左转车辆安全通行分析,分析过程中则纳入冲突临界速率与安全通行期望次数理念,并根据路口对向左转车辆安全通行轨迹、速率集中分布范围之分析结果及相关理论,研拟号志化路口对向左转车辆安全通行轨迹、速率,及对向直行左转车辆路权判断原则,以供驾驶者路口直行左转安全通行之参考。
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But in spite of Macaulay's brilliancy and his admirable faculty of making the commonplace seem fresh and picturesque, his positiveness wearied me at times, and his frequent sacrifices of truth to effect kept me in a questioning attitude very unlike the attitude of reverence in which I had listened to the Demosthenes of Great Britain.
尽管麦考利才华出众,他犀利的笔锋能化腐朽为神奇,确实令人钦佩,然而他的自负有时却令人厌烦。我对他那为了实用便可以牺牲真理的做法,也持怀疑的态度。这与我聆听被喻为英国的德摩斯梯尼的演说时的崇敬心情是截然不同的。
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With the increase of NaCl concentration and prolonging of stress time,the contents of Na in leaves of the untrasgenic plant was more distinct than the transgenic plant,especially under 0.9%NaCl stressed after 40 days, the contents of Na was 2.0-6.2 times compared with the transgenic plant in the same desposition,therefore,the un-transgenic plant died under this concentration in the end .
随着盐浓度的增加和胁迫时间的延长,对照植株叶片中Na 含量极显著地高于转基因植株,特别是在0.9%盐度下胁迫40d,对照植株的Na 含量极高,是该处理下转基因植株的2.0-6.2倍,因此,该浓度下的对照植株最终死亡。
- 推荐网络例句
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She gently rebuff ed him, but agreed that they could be friends
她婉言拒绝了,但同意作为朋友相处。
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If in the penal farm, you were sure to be criticized.
要是在劳改农场,你等着挨绳子吧!
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Several theories about reigniting and extinguishing of the arc have been refered.
本文综合考虑了几种电弧重燃和熄灭理论。