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Beijing environmental problems hold severe, and atmospheric and water pollute, soil and water loss, hot island and yawp are leading problems,and take on territorial characteristic. Based on research on relativity between urban forest and these environmental problems, urban forest can effective improve environmental quality in Beijing. And for the aim of improve environmental quality, Beijing forest overlay should attain 35% at least in citywide range, and local-areas being severe environmental problem should be provided with higher forest overlay.5. Through the study on urban forest needed capacity, Beijing's forest coverage is up to par in citywide range, but montanic forest coverage, plain covered with trees and average forest area are lacking, and CO2 and O2 balance is incapable;form the point of heat and balance CO2 and O2 balance,urban forest the city zone and suburb is lack. There is urban forest developmental potential space,but the city zone and suburb area need be compensated form urban forest in circumjacent region.6. On the based of the above results and ecological network system, the author drived whole region into city area, plain and mountain area are needed at the point of planning thoughts of running-through forests and water .

根据城市森林与北京市主要环境问题的相关性分析,城市森林在改善这些环境问题中具有重要的作用,为有效改善这些环境问题,整个北京市域范围内森林覆盖率至少达到35%,并且分布比较均匀,环境问题严重的局部区域需要不同程度增加森林覆盖率。5、通过对北京市城市森林需求量研究发现,虽然在市域范围内北京森林覆盖率达到了国家标准,但是山区森林覆盖率、平原林木覆盖率、城区人均森林面积不足;从区域热平衡和碳氧平衡角度分析,城区和郊区不能满足本区域的城市森林需求量,虽然北京市城市森林具有一定的发展潜力,整体上基本可以满足城市需要,但是这些区域需要依靠周边区域城市森林的补偿。6、根据以上的研究结果,以中国森林生态网络体系建设的点、线、面布局理念为指导,以&林网化——水网化&作为优化理念,将北京市整个市域划分为城区近郊区及其辐射区域,平原区和山区三大区域,依据三大区域特点进行城市森林布局优化。

The bow will also randomly teleport around out of melee range of its primary target and will shoot a Multishot, hitting a random number of targets in range for 2-3k each ocassionally.

弓能随机传送出其主要目标的近战攻击范围,并进行多重射击。对随机数量的玩家造成2-3千的远程伤害。

It was revealed that the balanced DO concentration appeared soon after the reaction stage starting,and DO level rose quickly in large range when COD was degraded to its nondegradation concentration under that condition,no matter that change the aeration rate or the MLSS concentration in large range,or change the initial COD concentration gradually or suddenly in the various experimental conditions.

结果表明,无论使曝气量或初始污泥浓度大幅度变化,还是逐渐或突然改变初始有机物浓度等各种试验条件,都会在反应阶段开始不久出现所谓平衡DO浓度现象;当有机物达到其难降解浓度时DO浓度迅速地大幅度升高。

According to the regression equations of initial crystallization temperature, the solubility of alumina and density at the temperature of 20 ℃ above its ICT of (2.23~3.0)NaF.AlF3-(0~5%)LiF-(0~15%)CaF2 system,the ICT isograms within the range of 910~950℃ and the density isograms at nonequal temperature within the range of 2.04~2.20g/cm3 under the 6%, 8%, 10%solubility of alumina were first obtained respectively.

基于(2.23~3.0)NaF.AlF3-(0~5%)LiF-(0~15%)CaF2系熔体初晶温度、变温氧化铝溶解能力和变温密度的研究,首次得到了氧化铝溶解能力为6%,8%和10%时温度范围在910~950℃的等溶初晶温度和密度在2.04~2.20g/cm3之间的等溶变温密度。

From the angle of a beam-forming, the cross- range focusing principle of the synthetic-aperture radar based on nonsinusoidal waves is studied. The expressions of antenna pattern for both rectangular signa l and Gaussian signal are presented. Compared with the conventional narrow bandw idth SAR whose cross-rang resolution is determined by the carrier frequency, th e cross-range resolution of the nonsinusoidal SAR is affected by the signal ban dwidth.

为研究非正弦波SAR的方位向分辨力,从波束形成的角度分析了非正弦波SAR的方位向聚焦原理,导出了基于矩形脉冲和高斯脉冲的合成孔径天线阵列方向图表达式,并与常规窄带SAR进行比较,指出影响非正弦波SAR方位向分辨力的主要因素为合成孔径长度和信号带宽,而与信号载频无关。

Requires extraordinary technical proficiency of the ball, running fast, skilled with the ability to have long-range, and shot a breakthrough technology Qiangdian outflanking shot. In the 1970s, the scope of their duties and activities of a more expanded offensive will no longer be limited to activities within the scope of this position, but often in the middle of the cut, play the role of the center, or with different side of the wing for a wide range of The cross, or retracement from midfield to the role of the avant-garde in order to achieve a variety of effective tactics to attack with.

要求具备熟练的带球过人技术,有快速奔跑、熟练配合的能力,并具备远射、突破射门及抢点包抄射门的技术。20世纪70年代以后,其职责和活动范围更为扩展,进攻时不再仅限于本位置范围内活动,而是经常向中间内切,起到中锋的作用,或与异侧的边锋作大范围的交叉,或回撤至中场起前卫的作用,以实现各种有效的进攻战术配合。

The proposed algorithm divides the overmodulation range into two parts, and allows smooth transitions through the entire operating area, from the linear range up to six-step operation, and keeps the linear relationship between the output current and the modulation index.

该方法根据调制比将整个过调制区域分为两部分,能实现变流器从线性区域到六脉波状态的平滑过渡,并且保证输出电流和调制比之间成线性关系。

The results show that, Au-19.25Ag-12.80Ge brazing alloy is better, its melting temperature range is 446.76494.40 ℃, and the temperature interval between the solidus and the liquidus is 47.64 ℃. When the brazing temperature is in the range of 510550 ℃, the alloy has a good spreadability and wettability with Ni. Interface structure observation reveals that there is one continuous intermetallic layer between the brazing alloy and the base metal Ni when welding. X-ray energy spectrum analysis results show that the intermetallic layer is Ge3Ni5, and because of its brittleness, the overthick intermetallic layer will decrease the shear strength of the welding joint, therefore, the welding technology should be controlled so as to gain an ideal welding interface structure.

研究结果表明:Au-19.25Ag-12.80Ge合金的性能较好,其熔化温度范围为446.76~494.40 ℃,结晶温度区间为47.64 ℃;焊接温度在510~550 ℃范围内时,Au-19.25Ag-12.80Ge钎料合金与Ni基体具有良好的铺展性和润湿性,焊接时钎料合金与Ni基体之间形成了一条连续的金属间化合物层,能谱分析表明该金属间化合物层为Ge3Ni5,由于该化合物较脆,过厚的金属间化合物层使焊接接头的剪切强度下降,故应适当控制焊接工艺以获得理想的焊接界面组织。

Gave a revaluating of long-range perspection on them in so many proven testimony; made a suggestion that there had superior metallogenic condition and favourable long-range perspection to find three Mississippi Valley Type Lead-Zinc deposits in Kezileitao-Kusilafu of West Kunlun Mountain Region.

认为塔木-卡拉牙斯卡克、阿尔巴勒克、卡兰古-卡拉塔什是西昆仑地区3个最佳的成矿远景区,在西昆仑地区至少可以找到3个大型的密西西比河谷型铅锌矿床,并为今后找矿工作指明了方向。

Based on the rapid development of Close-range photogrammetrical and laser-scanning technology, this paper presents some demerits of traditional Close-range photogrammetry, demands for the real-time photogrammetry at present, as well as the personal investigation in the theories of laser-scanning and the technologies about step-by-step generator and manipulating console.

本文针对近景摄影测量和激光扫描技术的发展,分析了传统近景摄影测量存在的问题和当前对实时摄影测量的需求,深入地研究了三维激光扫描的基本原理和实现其基本原理的关键技术。

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推荐网络例句

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力