参数变化

This paper focuses on how to calculate GPS satellite orbit parameters through IGS data. Choosing a group of appropriate parameters, and the relationship between satellite position in ITRF and these parameters are founded, and these parameters can be estimated using some successive ephemerides. Three different methods are introduced detailedly.

本文以IGS精密星历为基础，深入研究了利用精密星历计算GPS卫星轨道参数的模型与方法，并对三种不同的计算方案进行了比较研究，其目的是寻找一种合适的计算方法，得到能够正确反映一个较长时间段内(如800天)轨道参数随时间变化的规律。

The results showed that there were differences between adaption and regulation of different wheat varieties by prophyl dihydro jasmonate, so as to show diversity of gas exchange parameters, such as photosynthesis, water usage, etc. There was no evident difference between the reaction of two spring wheats (Jinchun1 and 1608) and the winter wheat (Xiaoyan 22) to PDJ. Different parameters of different wheat varieties had inequable reaction to different concentration of PDJ. Photosynthesis rate, water use efficiency and stomatal limiting value were enhanced when PDJ concentration reached a high degree. At the same time, leaf transpiration rate and stomatal conductance decreased. Therefore, wheat could maintain normal physiological activities while environmental conditions were changed.

结果发现，面对类似激素双氢茉莉酸丙酯调控下的不同品种小麦适应与调节存在差异，从而导致光合和水分利用等气体交换参数的表现也存在差异；两种春小麦（金春1号、l608）和一种冬小麦（小偃22）之间对PDJ的反应没有明显的冬春性间的差别；对不同品种、不同参数，PDJ起到作用的浓度不同，但无论如何PDJ都有相同的作用，当这种激素达到一定的浓度后，就会增强小麦的光合速率和水分利用率，增加气孔限制值，降低叶片的蒸腾速率和气孔导度，从而在外界条件变化时保持体内水分、延缓气孔关闭，维持体内正常的生理活动。

The data of light hydrocarbon from 772 oil samples in 25 oilfields, with GC/MS data from 338 saturated hydrocarbon samples were used to discuss the relationship among kerogen type, heptane value, isoheptane value and C29sterane 20S/(20S+20R) ratio. The effect factors for the abnormal change of these parameters were studied.

用采自中国国内25个油区的772个原油轻烃分析数据，结合其中338个样品的饱和烃GC/MS分析数据，就原油正、异庚烷值与烃源岩干酪根类型的关系以及与C29甾20S/（20S+20R）成熟度参数的相关性，对影响参数值发生异常变化的因素等作了研讨。

By employing the numerical simulation, the distribution and variation of thermal parameters such as pressure, velocity and so on in the louvered fins can be conducted in detail, on the basis of which, we can optimize the geometry structure, shorten the design period and reduce the experimental and design cost.

而采用CFD 软件对其温度场和流场的数值模拟分析，可以清楚的了解百叶窗翅片内部流场的压力、温度、速度等气动热力参数的分布和变化情况，优化其几何结构参数，从而大大降低实验设计费用，缩短设计周期。

Of conclusion leukaemia patient outside configuration of week blood white blood cell and structural change can pass VCS parameter to determine mensurably, if partial parameter is neuter distributinging breadth of bead cell volume, lymphocyte is average bulk is leukaemia the sieve is checked, diagnosed new index.

结论白血病患者的外周血白细胞形态和结构变化可以通过VCS参数定量地测定，部分参数如中性粒细胞体积分布宽度、淋巴细胞平均体积是白血病筛查、诊断的新指标。

Twelve density treatments were designed, which were 225×10^4 (T1), 300×10^4 (T2), 375×10^4 (T3), 450×10^4 (T4), 525×10^4 (T5), 600×10^4 (T6), 675×10^4 (T7), 750×10^4 (T8), 825×10^4 (T9), 900×10^4 (T10), 975×10^4 (T11) and 1050×10^4 (T12) basic plants/hm^2. Grain dry matter growing process and grain filling rate could be described by Richards Model and Monodic Quadratic Equation, and the grain filling parameters could be calculated from Richards model fomula. Relation analysis, stepwise regression analysis and path analysis were made by DPS, SPSS software.

方法设计了225万(T1)、300万(T2)、375万(T3)、450万(T4)、525万(T5)、600万(T6)、675万(T7)、750万(T8)、825万(T9)、900万(T10)、975万(T11)、1050万(T12)基本苗／hm^2共12个密度处理，分别运用Richards模型、一元二次方程模拟了冬小麦籽粒干物质增长过程及籽粒灌浆速率随花后时间的变化情况，并对所建立的Richards模型进行推导得到基本的灌浆参数，通过SPSS、DPS软件对籽粒灌浆参数与千粒重进行相关、逐步回归及以及通径分析。

Objective: To measure the variation and significance of respiratory impedance and pulmonary ventilation function in patients with bronchial asthma by impulse oscillometry before or after the bronchial provocation test, investigate the relationship between the IOS method and bronchial provocation test, and evaluate the clinical significance in bronchial asthma by IOS method.

目的：应用脉冲振荡法测定支气管哮喘患者在支气管激发试验前后的呼吸阻抗及肺通气功能参数的变化规律和临床意义，探讨IOS测定方法能否作为支气管激发试验的判断方法以及IOS测定参数在哮喘诊断中的价值。

Low-fat diet was given to those patients. The changes of total cholesterol,high-density lipoprotein,low-denstiy lipoprotein,triglyceride,aproprotein A, aproprotein B, creatinine, glutamic oxalacetic transaminase, glutamic pyruvic transaminase were measured before and after 1,3,6,12 months of Simvastatin therapy(10mg,qd).

所有患者均采取低脂饮食，测定患者血总胆固醇、高密度脂蛋白、低密度脂蛋白、甘油三酯、载脂蛋白A、载脂蛋白B、肌酐，谷草转氨酶及谷丙转氨酶等各参数数值；然后给予辛伐他汀10 mg，每晚一次口服，测定用药后1，3，6，12个月后以上各参数值的变化。

This paper gives a design to measure the vibration with photogrammetric survey,and at the same time,the method of bundle adjustment is applied to modify the position of targets.

因此设计了非接触的摄影测量方案，并提出了采用光束平差法来修正目标点位置坐标，并且在某些相机参数可能发生变化的情况下，采用光束平差的方法来修正相机的外参数，大大提高了本方案的鲁棒性能。

Japan＇ the mathematical model of thick control AGC are applied greatly in our country, and the feasibility and the merit of DAGC replacing with AGC are analysed, set - up system parameter are simlified, Because DAGC doesn＇ t affect with precontrol and monitor system in advance.

日本测厚计型AGC数学模型在我国引进较多，分析了DAGC代替测厚计型AGC的可行性和优点；简化了系统参数设定；由于DAGC与预控、监控系统无相互影响，所以不存在钢种变化而需要优化系统参数的问题。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。