指数的
- 与 指数的 相关的网络例句 [注:此内容来源于网络,仅供参考]
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The new formula of the interspecific association index is defined, in order to avoid the change of the interspecific association index with the alterability of plot area.
本次研究定义的联结度指数定义式:Y_2=NY_(02~(1/2),将用以消除经典联结度指数中,样地面积改变而导致联结度数值发生变化的情况。
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Using Chinese squid fishing production data during the main fishing season from 1999 to 2004 in the waters of 150—165°E, the present study combines the sea surface temperature with the horizontal gradient and the percentage of fishing times and daily catch as the suitability index. Using arithmetic mean model and geometric mean model, the integrated habitat suitability index is established based on SST and GSST .
中文摘要:根据 1999—2004 年8—10 月主渔汛期间我国鱿钓船在150—165°E 海域的鱿钓生产数据,结合其表温及表温梯度,分别将作业次数百分比和单位渔船日产量作为适应性指数,利用算术平均法和联乘法分别建立基于表温因子的综合栖息地指数模型。
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First, select four kinds of main risks source from bigly celebrate the main risk in region source, namely the flood, drought, sand-dust weather and petroleum pollution accident, etc. According to the different a request for to habitat, study this 19 kinds of landscapes ecosystem type of the Regional induce for 7 kinds of ecosystems system: Then the marsh of bulrush, lakes and reservoirs , salt alkali wasteland, prairie, island form wood, farmland, town. The difference is proceeded by characteristic according to each type ecosystem to the analysis of four kinds of main risks source, including the certain risk all rate, delimiting the space distribute, analyzing the risk strength to the receptor etc. At proceed the revelation the different from endanger to analyze the inside, this text borrows ecosystem index number that this index sign to reflect primarily habitat the ecosystem meaning of the type of habitat the different from position, with weak an index number to show the destructibility of the habitat, from but compute each ecosystem that is lost by ecosystem system an index number.
首先,从大庆地区主要的风险源中遴选出四种主要的风险源,即洪涝、干旱、沙尘天气和石油污染等;依据不同生物类群对生境的要求,将本研究区域的19种景观生态类型归纳为7种生态系统:即芦苇沼泽、湖泡库渠、盐碱荒地、草甸草原、岛状林、农田、城镇;对四种主要风险源的进行分析,包括确定风险概率,划定空间分布,对风险受体的作用强度分析等;在进行暴露和危害分析中,本文主要借生态指数这一指标来反映不同生境类型的生态意义和地位,以脆弱度指数来体现不同生境的易损性,从而计算出各受体生态系统的生态损失度指数;由于各主要风险物质对风险受体的作用强度是不同的,对形成区域性生态风险的作用大小也有差异,因此本文采用层次分析法对主要生态风险物质进行综合评价,并把判断矩阵排序权值的合理计算问题归为—非线性化问题,并提出用基于遗传算法(GA[5])的层次分析模型进行权重分析;进行风险表征,即综合前面两个阶段的信息,对环境中风险的性质和强度以及风险评价过程中不确定性问题进行分析与描述,并划分出五级生态风险区;最后,根据划分的五级生态风险区的特征,分别提出针对各生态风险区的生态风险管理对策。
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Chapter four studies the chaotic responses in a system consisting of simple pendulum and harmonic oscillator under bounded noise excitation. Firstly, the Melnikov function of the two-degree-of-freedom system under Hamiltonian perturbation is derived. The essential condition of the autonomous system for the probable onset of chaos is obtained, the Poincare maps of the system under small Hamiltonian perturbation and the effect of increasing perturbation on the Poincare maps are studies. Then for the non-autonomous system under damping and harmonic or bounded noise excitation, the largest Lyapunov exponent and Poincare maps are calculated. From the analysis of the largest Lyapunov exponent, the critical criterion for the onset of chaos, and the conclusion that the threshold of bounded noise amplitude for the onset of chaos in the system increases as the intensity parameter of Wiener process increases are obtained. The result from the analysis of Poincare maps is in agreement with that obtained from the Largest Lyapunov exponent. The effect of varying damping coefficient and intensity parameter of Wiener process is also analyzed.
第四章研究了有界噪声激励下的两自由度单摆—谐振子系统的混沌运动,首先推导了该两自由度系统仅在Hamilton扰动下的Melnikov函数,得到该自治系统可能产生混沌的必要条件;研究了该系统在小的Hamilton扰动和增大摄动情形下的Poincare截面;然后对有阻尼、谐和或有界噪声激励下的非自治系统数值计算了其最大Lyapunov指数和Poincare截面;从Lyapunov指数分析得到了这个两自由度系统产生混沌运动的临界条件及产生混沌的临界激励幅值随Wiener过程强度参数值的增大而增大的结论,Poincare截面分析的结果亦符合Lyapunov指数分析的结论;研究了Wiener过程强度参数、阻尼系数变化对Poincare截面的影响。
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Methods: 62 AS patients were randomly divided into the treatment group, with routine therapies plus sacroiliac joint injected Zhengqingfengtongning Injection, and the control group with routine medicine only. Some indicators were compared before and alter treatment including visual analog scale, bath ankylosing spondylitis functional index, Bath ankylosing spondylitis functional index, chest expansion, schober's test, erythrocyte sedimentation rate, C reactive protein and the general efficacy.
将患者62例随机分为治疗组32例与对照组30例,治疗组采用常规药物治疗加骶髂关节注射正清风痛宁注射液,对照组仅采用常规药物治疗;比较两组治疗前和治疗后1个月的目测类比评分、Bath强直性脊柱炎功能指数、Bath强直性脊柱炎疾病活动指数、扩胸度、Schober试验、血沉、C反应蛋白和两组总体疗效。
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Dow Jones - The Dow Jones Industrial Average is the most often quoted stock index in the world.
道琼斯-道琼斯工业平均指数是最经常引用的股票指数在世界上。
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Frank Gong, China economist at JP Morgan, is looking for a 10% to 15% downturn in these two indexes where the "risk-reward situation is now not attractive."
摩根大通的中国经济学家龚方雄预计深证指数和上证指数会下跌10%-15%。
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In England, people with a body mass index between 25 and 30 are categorised as overweight, and those with an index above 30 are categorised as obese.
在英格兰,人们与身体质量指数之间的25日和30划分为超重,那些与指数上述30划分为肥胖。
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The physico-chemical indexes were measured and the environmental qualitative compositive index and the chemical evaluational index were calculated to evaluate the water quality of this inner river.
通过理化指标的测定、计算环境质量综合指数及化学评价指数对内河水质进行评价。
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The Bath Ankylosing Spondylitis Functional Index is a functional index which can accurately assess a patient's functional impairment due to the disease as well as improvements following therapy.
浴室强直性脊柱炎功能指数是一个功能指数可以准确地评估患者的功能障碍由於疾病以及改善下列治疗。
- 推荐网络例句
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On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.
另一方面,更重要的是由于城市住房是一种异质性产品。
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Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.
气候直方图是将所收集的降水量测定值,分为几个相等的区间作为横轴,并将各区间内所测定值依所出现的次数累积而成的面积,用柱子排起来的图形,也叫做柱状图。
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You rap, you know we are not so good at rapping, huh?
你唱吧,你也知道我们并不那么擅长说唱,对吧?