In this study, mathematical model of biological fouling is constructed. In order to get the stable convergence solutions of differential equation, count method based on coefficient of efficiency is taken. 采用有效系数法对膜生物污染数学模型的微分方程式进行求解,建立了膜生物污染数学模型。
With the increase of physical time t the biological time τ defined as the integral of λ( t), the growth coefficient in general logistic growth curve, tended to increase to the maximum. 随着物理时间t的增加,生物时间τ(τ被定义为逻辑斯蒂生长曲线中生长系数λ(t)的积分)倾向于增加到最大值。
The individual relative fecundity Fl was significantly correlated to these biological character indexes except for maturity coefficient. 个体相对生殖力Fl除了与成熟系数相关关系不显著,与各生物学指标正相关;
Hydrodynamics and mass transfer of triplet loop biological fluidized bed reactors were studied in terms of gas holdup, liquid circulation velocity and volumetric mass transfer coefficient. 从气相含率、液体循环速度和体积氧传质系数方面研究自行设计新型结构的三重环流生物流化床的流体力学与传质特性。
In this paper, a method to detect and separate ultrasonic reflection and scattering for biological tissues, namely the envelope peak of correlation coefficient square detection with threshold ( EPCCSDT), is proposed. 给出了一种适用于生物组织反射界面定位及分离反射波和散射波的方法&相关系数平包络线峰值阈值法。
Both Biological Accumulating Coefficient and Biological Transfer Coefficient were larger than 1 for Castanea henryi and Phytolacca ( acinosa), indicating these two species are good for the ecological restoration of manganese mine wasteland. 板栗、商陆对Cd和Mn的生物累积系数和生物转移系数均大于1,表现出很强的富集能力,适用于锰矿区废弃地的生态恢复。
We detected 41 control sera provided by National Institute for the Control of Pharmaceutical and Biological Products. The results indicated that the general coincident rate were 100%, the variant coefficient was less than 10%. 检测卫生部药品和生物制品检定所提供的41份质控参比血清,其特异性、敏感性均为100%,变异系数小于10%。
In this paper, some parameters of the optical properties of biological tissues are discussed in detail, including absorption and scattering coefficients, anisotropy factor, as well as total attenuation coefficient and effective penetration depth introduced by them. 本文比较全面而详尽的讨论了生物组织的光学特性参数,其中包括吸收系数、散射系数、各向异性因子,以及由它们导出的总衰减系数、有效透射深度等。
The most biological tissues are a kind of turbid media, and have high forward scattering and low absorption coefficient in the red and near infrared region from 0.6 to 1.3 μ m. 大多数生物组织是一种混浊介质,在0-6~1-3μm的红光与近红外光波段具有高的前向散射和低吸收的特点。
Enhancing photosynthetic function, improving biological yield and economic coefficient is an important physiological basis for increasing the yield of potatoes covered with film. 增强光合性能,提高生物产量和经济系数,是旱作覆膜马铃薯增产的重要生理基础。
Biological sample estimation method was put forward according to prepare inquisitional biological sample size to establish insurance coefficient. 本探讨提出了一种根据预备调查的生物样本大小来确定保险系数的生物样本估计方法。
The biological yield and economic coefficient were positively related to grain yield. 大豆的生物产量及经济系数与经济产量相关显著。
For the biological tissues with the smaller ratio of reduced scattering coefficient to absorption coefficient, the simulated results indicated that the system error was decreased obviously, and its applicable field was extended. 对约化散射系数与吸收系数之比较小的生物组织进行了模拟测量,结果表明此种改进不仅减小了测量的系统误差,而且扩展了两点测量法的应用范围。
The biological traits of the coefficient and structure of this model were analyzed. 分析了模型系数和模型结构的生物学特性。
Enhanced UV-B radiation reduces the economic outputs, the biological outputs and economic coefficient, with bigger influence on the economic outputs. UV-B增加处理下玉米的经济产量、生物产量、经济系数均减少,且经济产量受到的影响更大一些。
Then, based on chosen biological data, we define and construct disease-associated protein-protein interaction networks, and make a statistical analysis of topological parameters ( including degree, cluster coefficient, shortest path number) on the networks as well. 然后,利用选择好的生物学数据,定义并构建了疾病相关的蛋白质互作网络,并对该网络作了三类拓扑参数(度,簇系数,最短路径条数)的统计分析。
The heat released from the aerobic phase is far greater than the anaerobic phase in traditional biological phosphorus removal system. The analysis of the total heat release shows that attenuation coefficient ( Kd) of the traditional biological phosphorus removal system is 0.02. 传统生物除磷方式中,好氧阶段放热量远远大于厌氧阶段,通过对总放热量的分析计算得到传统生物除磷系统自身衰减系数Kd为0.02。
There is no significant difference in food, behavior, weight, blood index and blood biological indexes, organ coefficient and organ pathology between the experimental and the control group. 结果各组动物在体重、血液学指标、血液生化学指标、和脏器系数等方面相比较结果无显著性差异。
From the biological available coefficient, migration coefficient analysis knowable cadmium, lead and manganese is higher. 从生物可利用系数、迁移系数分析可知镉、铅和锰污染较为严重。
Besides, the acoustic properties and thermal properties of biological tissues, such as thermal conductivity coefficient, heat capacity and so on, are other key factors. 除此之外,生物组织本身的热物性,例如热传导系数、热容也是决定热场分布的重要因素。
Among of characteristic parameters of biological cycle, absorption coefficient 、 cycling coefficient and utilization coefficient showed: Robinia pseudoacacia forest Platycladus orientalis forest Pinus tabulaeformis forest, nutrient productivity was in contrary order. 生物循环特征参数中,吸收系数、循环系数和养分利用系数均呈现出:刺槐林侧柏林油松林,养分生产力值的排序恰好相反。