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时间梯度
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  time gradient
     DETERMINATION OF MITOTIC PEAKED PERIOD OF ROOT CELL IN SOYBEAN (C.max & C.Soja) WITH METHOD OF TIME GRADIENT
     用时间梯度法确定大豆(G.max & C.soja)根尖细胞的有丝分裂高峰期
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     ConclusionWe have identified that Ang Ⅱ could improve proliferation of VSMCs and expression of NF-κB and phosphorylation Jak-STAT and change with time gradient in VSMCs.
     结论AngⅡ能导致VSMC增殖,同时NFκB和磷酸化的Jak2,STAT1表达增加并随刺激时间梯度改变。
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     objective To study the protective effects of ischemic preconditioning with pneumatic tourniquet on ischemia and reperfusion injury of skeletal muscle of rat and to explore the relationship between the time gradient of ischemia and reperfusion.
     目的 :研究止血带缺血预处理对骨骼肌缺血再灌注损伤的保护作用和缺血时间梯度与再灌注时间梯度的关系。
短句来源
     β \|diversity was zero for all sample plots from June to August along time gradient. In addition, β \|diversity were 0 79 along horizontal gradient and 1 48 along vertical gradient.
     β-多样性在时间梯度 6~ 8月份在所有样点 β=0 ,水平梯度β=0 .79,垂直梯度β=1 .48;
短句来源
     Methods Divided 80 guinea pigs into 4 groups, spread on different intensity of corticosteroid tincture in time gradient,then observed the skin exterior and pathological changes.
     方法:将80只豚鼠按弱、中、强及超强度激素随机分为4组,按时间梯度外用激素,观察停药后皮肤的外观及病理改变。
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  temporal gradient
     It has been found that precipitation depends on lots of factors of which cloud top temperature, albedo, and temporal gradient of cloud top temperature are most significant.
     发现降水与很多因子有关,而云顶温度、反照率及云顶温度的时间梯度最为明显。
短句来源
     A novel gradient constraint equation was obtained through analyzing the error of temporal gradient.
     通过对时间梯度误差的分析 ,得到了新的梯度约束方程 ;
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  “时间梯度”译为未确定词的双语例句
     The level of STAT1 in nuclei which was stimulated by Ang Ⅱ for 15 min was higher than that for 60 min stimulation (P<0.05) and controls (P<0.01).
     免疫荧光则表明NFκB及STAT1分子随时间梯度可逆的由胞浆转至胞核,在AngⅡ刺激15min组中STAT1表达水平比对照组(P<0.01)及刺激60min高(P<0.05)。
短句来源
     The fraction of cells with low mitochondria membrane potential and increased activity of Caspase-3 were detected either in the heating-temperature grads group or in the heating-time grads group, which showed significant relationship between the two apoptosis related index(r=0.89189,P=0.0029 in the heating-temperature grads group; r=0.9679,P=0.0003 in the heating-time grads group).
     无论温度梯度(38℃~44℃,10min)还是时间梯度(42℃,10min~60min)的超声加热,均能导致ΔΨm显著降低(P<0.01)、Caspase-3活性显著升高(P<0.01),且两者具有显著相关性(温度梯度组r=0.89189,P=0.0029,时间梯度组r=0.9679,P=0.0003)。
短句来源
     In our experiment, we select 0, 0.1, 0.8, 1- 3, 7, 14, 21, 28 days as our gradient by this means .
     我们选择的时间梯度为0、0.1、0.8、1、7、14、21、28天。
短句来源
     To establishing optimum exposing time of the X-ray film, gradient exposing time, namely 7.5, 15, 30, 60 and 120minute, also were applied.
     设置7.5、15、30、60、120分钟X胶片曝光时间梯度,筛选最佳曝光时间;
短句来源
     Set up different temperature(0,4 ℃and 25 ℃)and different time(10,15,20,25 and 30 min)to get to know which was the best.
     分析影响提取条件的因素,设置0、4、室温(25℃)3个温度梯度和10、15、20、25、30min5个时间梯度,进行常规SDS-PAGE,检测提取表层蛋白的效果.
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  time gradient
The groups of phytoplanktonic species identified by the time gradient and the method of cluster analysis of species lists were compared.
      
Microbial changes were investigated by PCR-temperature time gradient electrophoresis (TTGE) and following the dynamics of polar lipid fatty acids (PLFA).
      
A marked antero-posterior time gradient is evident in blastoderm formation.
      
The performance of these shape functions in 2D scalar wave propagation problems is tested both for the potential (displacement) and for the time gradient (velocity) equations.
      
So minimum echo time gradient-echo sequences should be used for sensitive imaging of tendon alterations, because no considerable signal dephasing due to susceptibility effects were found in tendon.
      
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  temporal gradient
A theory of measurement error and its implications for spatial and temporal gradient sensing during chemotaxis
      
The system consists of four parts: (1) Temporal gradient, logic AND, and dynamic thresholding operations are used to obtain the primary mask.
      
The method combines the ability of the stereo processing to acquire highly accurate depth measurements and the efficiency of spatial and temporal gradient analysis.
      
In our approach, we use spatial and temporal gradient (STG) analysis, which has been shown to provide depth with great efficiency, but limited accuracy, to guide the matching process of stereo.
      
Cysteine and methionine, general inhibitors of chemotaxis, both completely inhibited the smooth response in a temporal gradient of attractant.
      
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Twin fetuses of diff(?)ent prenatal stages were taken from 28 ewes of the Hu (Lake) sheep, a native breed well-known for its lamb-fur production in the Tai Lake region. Cross-sections were made from skin samples histologically to study the development and growth of the peridermis, dermis, thickness of the skin,cells of the connective tissue, components of the hair follicles and the accessory glands as well as hair follicle mass.The result indicated that four successive stages could be involved in the development...

Twin fetuses of diff(?)ent prenatal stages were taken from 28 ewes of the Hu (Lake) sheep, a native breed well-known for its lamb-fur production in the Tai Lake region. Cross-sections were made from skin samples histologically to study the development and growth of the peridermis, dermis, thickness of the skin,cells of the connective tissue, components of the hair follicles and the accessory glands as well as hair follicle mass.The result indicated that four successive stages could be involved in the development of the skin components. At the first stage, about 1.5 months of the fetal age, the embryonic peridermis turned from single layer to multiple layer and mesenchymal cells appeared in the dermal region, tending to differentiation.On days 45 to 66, the premordia of the primary hair follicles developed extensively. At the second stage, during 2-3 months of the fetal life, the embryonic peridermis became thickened, differentiated and degenerated, the derminal region differentiated into upper and lower layers, and the primary hair follicles developed intensively and differentiated. On 95th day, the secondary hair follicles developed markedly; the sweat glands and the sebaceous glands also appeared in succession. At the third stage, about 3.5 months, the embryonic peridermis became degenerated and retrogressed apparently, its cornified layer desquamated and lessened in thickness. The dermis in the main became differentiated into three strata: subperidermal, intermediate and reticular. Meanwhile, the primary hair follicles matured, wool penetrated through the skin and the secondary hair follicles grew rapidly. The development of the hair follicle mass completed basically. At the fourth stage, about 4.5 months of the fetal life, the embrvonic peridermis, lessening in its thickness, became the normal peridermis, in which the layers of cells and their demarcation were not clearly distinguished and the layers of the dermis were similar to those of the newborn lamb. Secondary hair follicles partially matured from which fine wool penetrated through the skin.The hajr follicle masses were apparent.The development and differentiation of the skin component were finished in the main and the skin became thickened intensively.The result also demonstrated that the development and differentiation of certain skin components varied with different positions where the skin samples were taken, As to the development of the hair follicles and the penetration of the wool through the skin, there exist the time gradients not only from anterior to posterior parts but also from abdominal to dorsal.Taking the development of the hair follicle mass at the dorsal and abdominal parts on 130th day as an example, lower density of the hair follicles, less proportion of the secondary hair follicles to the primary ones and early maturing of the secondary hair follicles could be indicated as the proper characters of the Hu sheep breed.

作者采用组织切片方法,对28头湖羊不同胎龄的胎儿,就皮肤的表皮、真皮、皮肤厚度、结缔组织细胞以及毛囊、附属腺、毛囊群等成份,进行发生和生长的研究。结果表明,湖羊皮肤诸成份的发生可归纳为四个连续阶段。第一阶段:胎龄约在1.5月,胚胎性表皮由单层变成复层,真皮区为间充质细胞,但有分化趋向。胎龄45~66天时,普遍发生初级毛囊原基。第二阶段:胎龄约在3个月,胚胎性表皮增厚,分化和变性,真皮区分化为上下二层,初级毛囊强烈生长和分化。95天时,次级毛囊大量发生。汗腺和皮脂腺也先后发生。第三阶段:胎龄约在3.5月,胚胎性表皮明显变性和退化,角化层脱落,厚度减少,真皮大体分化为表皮下层,中间层和网状层,初级毛囊发育成熟,粗毛穿出皮肤,次级毛囊迅速生长,毛囊群发育基本完成。第四阶段:胎龄约4.5月,胚胎性表皮变为一般表皮,很薄,细胞层次和界线不清。真皮层次和初生羔羊相似,部分次级毛囊发育成熟,其中细毛穿出皮肤。毛囊群清晰,皮肤各成份发生和分化基本结束,开始急剧增厚。 研究显示,皮肤一些成份发生和分化因部位不同而有差异,毛囊发生和粗毛穿出皮肤,不仅有由前到后的时间梯度,而且有从腹到背的梯度。从130天背部和腹部毛囊...

作者采用组织切片方法,对28头湖羊不同胎龄的胎儿,就皮肤的表皮、真皮、皮肤厚度、结缔组织细胞以及毛囊、附属腺、毛囊群等成份,进行发生和生长的研究。结果表明,湖羊皮肤诸成份的发生可归纳为四个连续阶段。第一阶段:胎龄约在1.5月,胚胎性表皮由单层变成复层,真皮区为间充质细胞,但有分化趋向。胎龄45~66天时,普遍发生初级毛囊原基。第二阶段:胎龄约在3个月,胚胎性表皮增厚,分化和变性,真皮区分化为上下二层,初级毛囊强烈生长和分化。95天时,次级毛囊大量发生。汗腺和皮脂腺也先后发生。第三阶段:胎龄约在3.5月,胚胎性表皮明显变性和退化,角化层脱落,厚度减少,真皮大体分化为表皮下层,中间层和网状层,初级毛囊发育成熟,粗毛穿出皮肤,次级毛囊迅速生长,毛囊群发育基本完成。第四阶段:胎龄约4.5月,胚胎性表皮变为一般表皮,很薄,细胞层次和界线不清。真皮层次和初生羔羊相似,部分次级毛囊发育成熟,其中细毛穿出皮肤。毛囊群清晰,皮肤各成份发生和分化基本结束,开始急剧增厚。 研究显示,皮肤一些成份发生和分化因部位不同而有差异,毛囊发生和粗毛穿出皮肤,不仅有由前到后的时间梯度,而且有从腹到背的梯度。从130天背部和腹部毛囊群发育来看,毛囊密度低、次级毛囊对初级毛囊比值小,以及次级毛囊成熟早,都?

By applying coordinate transformation,the formula of 3-D stacking velocity distribution in dipping plane layered medium is derived on the basis of studying 3-D formula in the form of DIX formula.We can demonstrate that the stacking velocity varies with line azimuth in the form of ellipse, and that the ratio of short axis to long axis is equal to the cosine of the apparent dip angle, the long axis indicating the apparent dip of formation. It follows that the time-distance surface of a common depth point(CDP)...

By applying coordinate transformation,the formula of 3-D stacking velocity distribution in dipping plane layered medium is derived on the basis of studying 3-D formula in the form of DIX formula.We can demonstrate that the stacking velocity varies with line azimuth in the form of ellipse, and that the ratio of short axis to long axis is equal to the cosine of the apparent dip angle, the long axis indicating the apparent dip of formation. It follows that the time-distance surface of a common depth point(CDP) should be approximated by elliptic hyperbolic surface rather than a rotational hyperpoloid. Generally speaking, the effect of several conventional 2-D velocity analysises is better than that of one simple 3-D velocity analysis. The computation shows that when dip angle is bigger, the variation of 3-D stacking velocity will cause nonnegligible affect on NMO correction. For example, When dip angle is 30°, relative velocity error 15.5% causes 137.1 ms maximum error in NMO correction for 2500m spread. Two algorithms for computing 3-D velocity distributino parameters before and after preliminary stack are put forward. According to the algorithm pefore preliminary stacking, the parameters V_T, β and φ are calculated by first obtaining stacking velocities V_(Nx) and V_(Ny) from the velocity analysis data in one direction, then picking time gradients t_x and t_y from the crossed horizontal stacked sections. The algorithm after preliminary stacking determines V_r, β and φ by making three 2-D velocity analysises in three directions for each CDP.

在三维DIX型公式(文献[1])研究的基础上,对三维多层任意倾斜平界面的情况,采用坐标变换方法,推导出三维叠加速度的分布公式。可以证明,叠加速度随方位角呈椭固状变化,椭圆的短、长轴之比为视倾角的余弦,椭圆的走向为地层的视倾向方向。由此可见,一个CDP点的时距曲面,应当用椭圆的双曲面去逼近,而不应当用旋转双曲面去逼近。在一般情况下,作数个二维常规速度分析,要比简单地作一个三维速度分析好。在地层倾角较大时,计算表明,三维叠加速度变化对动校正的影响是不可忽略的,当地层倾角为30°时,相对速度误差为15.5%,炮检距为2500米时,动校正的最大误差可达137.1毫秒。据此,就初步叠加前后两种情况给出计算三维叠加速度分布参数的算法。对于前者首先要从一个方向的速度分析资料中得到叠加速度V_(N_Z)和V_(N_B),然后从两个方向的水平叠加剖面上拾取时间梯度t_x,t_v,求解分布公式中三个参数V_r、β、φ。对于后者,要求在一个CDP点上至少要作三个不同方位的常规二维速度分析,由此求出V_r、β、φ值。

In theprensent paper, themethod of time gradient was plovided to determine mitotic peaked period of root cell in soybean. There were alike mitotic peaked period both in different ecotype cultivated varieties and different evolutional typies (G.soja, G.gracilis & G.max) which had been tested by this method.

本文报告了用时间梯度确定大豆根尖的有丝分裂高峰期的方法。并用该法测定出省内外不同生态型栽培品种和不同进化类型(野生、半野生及栽培三种类型)的大豆材料都具有相同的有丝分裂高峰期。在贵阳地区,28℃培养条件下,其细胞分裂高峰期均在上午8时前后。 本试验的供试材料,在大豆的细胞周期中,共出现两次有丝分裂高峰(M_1为7:30~8:30; M_2为14:30~15:30)。其峰值,M_1比M_2高出近一倍。因而应用于染色体制片技术时,宜在M_1时间内进行大豆根尖细胞的前处理。

 
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