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The status quo of high-resolution data acquisition system is discussed and by studying the character of high-resolution seismic exploration and seismic signal, the theoretical models and character of each unit are gained. This paper point out that under 1000 meter's depth where petroleum is embedded the IDR of central controlled seismic instrument and telemetricseismic instrument are lower than 70dB which can't meet the needs of high-resolution seismic exploration.
文章论述了当代高分辨率地震数据采集系统的现状,对高分辨率地震勘探及地震信号特点进行了研究,得出了高分辨率地震勘探数据采集系统的理论模型和各功能单元的理论特性,指出在石油与天然气埋藏的千米以下的地层,集中式数字地震仪和24位遥测地震仪的瞬时动态范围均不超过70dB,远远满足不了高分辨率地震勘探的需要。
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The content of kaolinite varies in the range of 80%to 95%.Two occurrences of kaolinite are rev ealed:one is in the form of aggregate of vermiform crystals;another is in the form of cryptocrystalline or colloidal materials.Its crystallization index is calculated to be 0.54~0.74a nd 0.47~0.53,indicating its higher degree o f order.Chemical analyses show that the compositions of kaolinite are close to its theoretical values.
光学及扫描电子显微镜、 X射线衍射分析和红外分析等系统性研究的结果表明,高岭石主要有两种存在形式,一种呈蠕虫状集晶,另一种是隐晶质或胶状高岭石,测得其结晶指数分别为 0.54~ 0.74和 0.47~ 0.53,说明其有序度偏高;化学分析结果表明,其化学成分接近于高岭石的理论值, Al2O3含量达 35%~ 37%, SiO2含量为 47%~ 48%,碱金属、碱土金属及其他氧化物含量很低。
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In the thesis, the effects of cement and vesicant, ratio between water and solid materials, early intensifier and micron slag powder on the compression strength of cement-mortar foamed concrete have been studied.
本文通过实验得出水泥掺加量多少和水化后的抗压强度决定了泡沫混凝土的抗压强度,掺加量越高,泡沫混凝土抗压强度越高;水泥标号越高,泡沫混凝土抗压强度越高。
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In this project, we study the theory of higher order differential equations in Banach spaces and related topics. We solve an open problem put forward by two American Mathematicians and two Italian Mathematicians concerning wave equations with generalized Weztzell boundary conditions, introduce an existence family of operators from a Banach space $Y$ to $X$ for the Cauchy problem for higher order differential equations in a Banach space $X$, establish a sufficient and necessary condition ensuring $ACP_n$ possesses an exponentially bounded existence family, as well as some basic results in a quite general setting about the existence and continuous dependence on initial data of the solutions of $ACP_n$ and $IACP_n$. We set up quite a few multiplicative and additive perturbation theorems for existence families governing a wide class of higher order differential equations, regularized cosine operator families, regularized semigroups, and solution operators of Volterra integral equations, obtain classical and strict solutions having optimal regularity for the inhomogeneous nonautonomous heat equations with generalized Wentzell boundary conditions, gain novel existence and uniqueness theorems,which extend essentially the existing results, for mild and classical solutions of nonlocal Cauchy problems for semilinear evolution equations, present a new theorem with regard to the boundary feedback stabilization of a hybrid system composed of a viscoelastic thin plate with one part of its edge clamped and the rest-free part attached to a visocelastic rigid body. Also we obtain many other research results.
在本研究中,我们对Banach空间中的高阶算子微分方程的理论以及相关理论进行了深入研究,解决了由美国和意大利的四位数学家联合提出的一个关于广义Wentzell边界条件下的波动方程适定性的公开问题,恰当地定义了Banach空间中的高阶算子微分方程Cauchy问题的算子存在族及唯一族,建立了齐次和非齐次高阶算子微分方程Cauchy问题适定性的判别定理,获得了关于高阶退化算子微分方程的算子存在族、正则余弦算子族、正则算子半群、Volterra积分方程解算子族的乘积扰动和混合扰动定理,得到了关于以依赖于时间的二阶微分算子为系数的一大类非自治热方程非齐次情形下的时变广义Wentzell动力边值问题的古典解、严格解的最大正则性结果,获得了半线性发展方程非局部Cauchy问题广义解和经典解存在唯一的判别条件,从实质上推广了现有的相关结果;得到了一部分边缘固定而另一部分附在一粘弹性刚体上的薄板构成的混合粘弹性系统的边界反馈稳定化的新稳定化定理,还建立了一系列其他研究结果。
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Path analysis showed that N translocation rate of culm was higher for the high fresh ear yield varieties,while the N translocation rate of culm and tassel was higher for the high fresh kernel yield varieties,and the N translocation rate of leaf,bracteal leaf and ear axis was higher for the high kernel yield varieties.In addition,higher N translocation rate of leaf had a beneficial effect on N utilization efficiency as for fresh ear,fresh kernel or maturity kernel of the produce of waxy corn.
通径分析表明,鲜穗高产品种茎秆的氮素转移率较高,鲜子粒高产品种茎秆和雄穗的氮素转移率较高,成熟子粒高产品种叶片、苞叶及穗轴的氮素转移率均较高;叶片的氮素转移率高有利于品种鲜穗、鲜子粒及成熟子粒氮素利用效率的提高。
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Intraoperative injection of anhydrous alcohol in inoperable pancreatic cancer;2. The long term results of injection anhydrous alcohol to treat bromidrosis and its standard protocol;3. Accordingly, it becomes the best choice in the production of anhydrous alcohol .
分子筛的晶体结构不同于硅胶、活性炭等,具有高吸附性,对H2O ,NH3,H2S,CO2 等高极性分子具有很高的亲和力,在相对湿度小于30 %时,分子筛的吸水量比硅胶和氧化铝都高得多,用其生产无水酒精是最佳方案,工艺流程分为:(1)两塔蒸馏加分子筛;(2)分子筛处理后在蒸馏塔回收;(3)分子筛处理后送专用塔浓缩。
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Higher Ca distributed in bulliformcell than in mesophyll cell and bundle sheath cell of dune reed, higher Mg distributedin mesophyll cell and higher K, Na and Cl distributed in sheath cell HigherNa and Mg distributed in mesophyll than in bulliform cell and bundle sheathcell of light salt meadow reed, and higher K, Ca and Cl distributed in itsbundle sheath cell. Higher Na and Mg distributed in bulliform cell than in mesophyllcell and bundle sheath cell of heavy salt meadow reed, higher K, Ca and Cl distributedin its mesophyll cell. This paper discussed the distribution conditions of theabove five ions in leaf cell of the four reed ecotypes and the meaning ofphysiological adaptation to habitat in detail.
沙丘芦苇的泡状细胞内Ca分布较叶肉细胞和鞘细胞高,叶细胞内Mg分布较高,在鞘细胞内K,Na和Cl布较高;轻度盐化草甸芦苇叶肉细胞内分布了较多的Na和Mg,在鞘细胞内K,Ca和C1分布较叶肉细胞和泡状细胞高;而重度盐化草甸芦苇泡状细胞内分布了较多的Na和Mg,叶肉细胞分布了较多的K,Ca和Cl;详细讨论了以上五种离子在不同生态型芦苇叶片内不同细胞类型的分布状况与环境适应的意义。
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The results show, under the long-trem influence of different farming behaviors, the soil, collected from dry-land in low multiple crop index to dry-land in high multiple crop index to composite-land in high multiple crop index, decease in bult density, clay content, total P and activities of catalaes and increase in organic matter, humic acid contents, nitogen, available nitrogen, phosphorus, potassium, soi breathe intensity and urease, phosphatase, protease active content.
选择贵州中部喀斯特山区普定县猫洞小流域地区,通过长期受不同生产行为影响的区域(低复种旱作区、高复种旱作区、高复种复合农作区)的土壤采样分析,结果表明:喀斯特山区小流域土壤在长期不同生产行为影响下,从低复种指数旱作区、高复种指数旱作区到高复种指数复合农作区,土壤容重、粘粒含量减小,而土壤有机质、腐殖酸含量、全氮、碱解氮、速效磷、速效钾、土壤呼吸强度、脲酶、磷酸酶、蛋白酶活性含量依次增大,土壤全钾含量和过氧化氢酶活性却依次减小。
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ConclusionNew criteria of plasma lipid values in children in Beijing are established by our investigation in 971 healthy school students.Age and sex have been analyzed.Borderline and high of TC and LDLC levels have been settled.Cutoff of hypertriglyceridemia and hypohigh density lipoprotein cholesterolemia have also been established.
结论通过对971名北京市中小学生的血脂调查,建立了北京地区不同年龄性别儿童青少年的血脂正常值,确立了临界高胆固醇和高胆固醇血症浓度、高甘油三酯血症浓度和低高密度脂蛋白浓度。
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Totally 36 male Wister rats were randomly and averagely divided into three groups, and all groups were fed for 6 weeks: control group were fed with basic food; the rats in hyperlipidemia group were fed with hyperlipidemia diet; the rats in hyperlipidemia stress group were given hyperlipidemia diet, and were exposed under the different stressors at the same times, including limit, circumvolve and huddle.
36只Wister雄性大鼠随机平分为3组,均饲养6周,正常对照组喂食普通饲料;高脂组喂食高脂混合饲料;高脂加应激组除喂食高脂混合饲料外,同时给予限制应激、旋转应激、拥挤应激。
- 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?