径中的
- 与 径中的 相关的网络例句 [注:此内容来源于网络,仅供参考]
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By using the electronic stopping power of Oen Robinson in the bipartition model of ion transport,the path lengths,reflection coefficients and range distributions have been calculated.
将Oen-Robinson电子阻止本领用于离子输运双群模型,计算了离子在固体中的径迹长度、反射系数和射程分布,并讨论了采用不同阻止本领对输运计算的影响。
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OBJECTIVE To discuss the method, efficacy and safety of endoscopic frontal sinus surgery in the route anterior to ethmoidal bulla.
目的 探讨经鼻内镜筛泡前径路额窦开放术的技术路线,讨论该术式在额窦开放中的疗效和安全性。
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In this thesis,the changes of the circulation-time according to different size particles of the broad size coarse carbamide particles were studied.
本文选用宽粒度分布大颗粒尿素物料,在带导流管的喷动流化床中,测定了在不同操作参数条件下,不同粒径粒子的平均循环时间。
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At the end of this chapter, we analyze the algorithms' performance in multipath fading channels.
在该章的最后,我们对这些算法在多径瑞利衰落信道中的性能都进行了分析。
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The decomposing kinetics of ilmenite in KOH sub-molten salt was investigated. The effects of factors, such as reaction temperature and particle size of the ore, on the decomposition rate of ilmenite were also studied.
摘 要:对钛铁矿在氢氧化钾亚熔盐体系中的分解动力学进行研究,考察反应温度及矿粒粒径对钛铁矿分解率的影响。
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In broadband wireless communication, ISI caused by multi-path affect the performance of the communication system seriously.
在宽带无线通信中,多径引起的符号间干扰严重影响了通信系统的性能。
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The conclusions were as follows: theνO-H andνC=O IR absorption maxima shifted towards higher wave numbers after imprinting 17β-estradiol on TFMAA-co-TRIM copolymer with the red shift of theνO-H groups being apparent after precipitation polymerization for 16h while that forνC=O groups being observed after polymerization for 24h. A strong interaction between TFMAA and 17β-estradiol was confirmed by the high selectivity for 17β-estradiol, as indicted by the values of the separation factor of isomers of 17β-estradiol/17α-estradiol (2.28) and the imprinted factor (3.01). Particle diameter of TFMAA-co-TRIM polymer was between 300 nm and 1.5μm, which suited well for solid phase sorbent throughout at low column pressure. The recognition of imprinting TFMAA-co-TRIM polymer for sterol molecules was driven by enthalpy eluted with acetronitile, and low temperature was in favor of the separation of sterol structure analogues on imprinting column. TFMAA-co-TRIM polymer possessed of determinate anti-heat stability, with melting point beginning at 255.84℃, Tp=257.40℃, control TFMAA-co-TRIM polymer and imprinting TFMAA-co-TRIM polymer were respectively decompounded at 267.79℃and 343.11℃, and solid micro-extraction noddle prepared by the special polymerization also showed definite recognition for 17β-estradiol by GC/MS detecting at 270℃. By selection of various washing and elution solvents, elution reagents of close polymerization system were of more advantage in template molecules retention and recognition on molecularly imprinted solid phase extraction column. At a certain extent, progesterone, 17α-estradiol, 17β-estradiol and 4-androstene-3, 17-dione could be intercepted on the MISPE column. Especially, MISPE had high selectivity for progesterone, and imprinting TFMAA-co-TRIM polymer could achieve adsorption balance within 50 min by absorption kinetics test for 17β-estradiol. However, MISPE column showed better selectivity and enrichment property for 17β-estradiol than C18 and CSPE columns according to the data from HPLC and GC/MS analyses. Recovery of 17β-estradiol on MISPE column was up to 85.5% while when prime extracting solution of milk powder was sampled, the recovery of CSPE and C18 columns were 43.7% and 30.7%, respectively.
通过研究阐明:紫外聚合产物TFMAA-co-TRIM中的νO-H振动吸收峰在聚合16h后红移,νC=O振动吸收峰在聚合24h后红移;TFMAA-co-TRIM对雌二醇异构体的印迹因子达到了3.01,α为2.28,优于其它功能单体参与得到的聚合物识别特性;TFMAA-co-TRIM聚合物粒径介于300 nm至1.5μm之间,作为色谱固定相具有良好的通量和低的柱压;在乙腈流动相中,TFMAA-co-TRIM分子印迹固定相的分离过程主要被焓驱动,低温有利于分子印迹固定相分离甾醇结构类似物;TFMAA-co-TRIM分子印迹聚合物在255.84℃时开始熔融,Tp=257.40℃,聚合物CP的降解温度在267.79℃,MIP降解温度在343.11℃,制备的固相微萃取头初步经GC/MS 270℃的耐热性测定;不同的洗提溶剂筛选证明了选择接近聚合溶剂的洗脱体系更有利于MISPE发挥识别效应;分子印迹固相萃取柱对孕酮、17α-雌二醇、17β-雌二醇和雄烯二酮都具有不同程度的保留特性,可作为此类化合物的吸附材料,特别对孕酮强保留的富集特性,可作为孕酮的选择性识别吸附剂,其分子印迹聚合物对17β-雌二醇的吸附动力学测定显示在50 min内基本达到吸附平衡,具有作为传感器核心敏感材料的潜力;对比萃取奶粉中17β-雌二醇性能,MISPE柱比非分子印迹固相萃取柱和C18柱具有更高的保留,回收率依次为85.5%,43.7%和30.7%。
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Producted RF and CRF aerogels by process of sol-gel technics, dynamic-exchange, CO2 supercritical drying, and procedural increase in temperature carbonization methods, which have eximious capability and nanometer network structure; Systemic analysis various factors which effect gel course, such as ratio of reactants and the dosage of catalyst, and probed into the better experiments conditions(the concentration of resorcinol and formaldehyde is more than 2% and the value of R/C is between 50 and 300); During gel course , primary investigated the viscosity curve and particle size distribution of sol-solution, and analyzed the reason of catalyst dosage effects particle size of gel, and confirmed that the up-growth of gel follows the theory of " polymerize increase ".The experiment results indicated that ultrasonic with unvarying temperature disposal shortened gel time and optimized quality of gels, and the factors of ultrasonic effect gel reaction velocity were analyzed; Prepared organic aerogels using compounds of resorcin and hydroquinone substitute resorcinol reacts with formaldehyde the first time, and also optimized the proportion of resorcinol and hydroquinone (the proportion of hydroquinone in 10%~40%).
采用溶胶-凝胶工艺结合动态溶剂交换、CO2超临界流体干燥与程序升温碳化方法制备出性能优良、具有纳米网络结构的RF与CRF气凝胶;深入研究了反应物配比催化剂用量等条件对凝胶过程的影响,得到了较佳的RF凝胶制备条件(RF浓度应大于2%,R/C值取50~300);初步研究了凝胶过程中的粘度、粒径变化情况,分析了催化剂用量影响凝胶中粒子尺度的原因,在实验上印证了凝胶生长遵循"聚增长"的理论;通过引入超声波改进了RF气凝胶的制备工艺,缩短了凝胶反应时间,提高了凝胶品质,并探讨了超声波促进RF凝胶反应作用的原因;首次用对苯二酚与间苯二酚复配制备了混合有机气凝胶,优化出复配比(对苯二酚含量为10%~40%)。2。
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Compared with non-nanopolyaniline synthesized by conventional emulsion polymerization, nanopolyaniline has the narrow and uniform distribution of particle dimension and the diameter of particle is about 4-5nm,and the conductivity reaches 3.2S·cm-1, which is more than 100 times higher than that of nanopolyaniline;Moreover, it has higher solubility in conventional solvent and the solubility reaches 95% in N-methyl pyrrolidone;what's more ,it has higher crystallinity and more uniform crystal proved by XRD, apparent blue shift indicated by UV, which makes it possible to prepare transparent conductive composite films.
结果表明,微乳液法合成的纳米聚苯胺与常规乳液法合成的非纳米聚苯胺相比,具有明显的优越性:粒径分布窄,95%的在10nm 以下,最大的不超过30nm;电导率较高,达到了3.2S/cm,提高了2 个数量级以上;在有机溶剂中的溶解度较高,其中在N-甲基吡咯烷酮中的溶解率达到了95%;X 射线衍射仪分析表明,纳米聚苯胺结晶度高,晶型更为规整;紫外可见光谱研究发现,纳米聚苯胺在可见光区有明显的蓝移,为制备透明的导电复合膜提供了可能。
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3D effect is analyzed and the average velocity of wave propagating in the pile, which mainly influences inverse interpretation, is discussed. Finally, the theory results are verified by model experiment. It is shown that 3D results have the same phase with ID results. The pile radius, the duration of impulse, the ratio of hammer radius to pile radius and shear velocity of the soil around the pile have influences on 3D effect. The best position of receiver is 0.55R from the pile center. The average velocity of wave propagating in the pile reduces due to transversal inertia effect and 3D effect.
结果表明:三维曲线与一维结果在相位特征上一致;波场图直观地反映了波在桩中的传播规律;三维效应与桩径、激振脉冲宽度、相对激振半径及桩周土剪切波速有关;传感器放在0.55R处可以得到干扰较小的信号;三维效应和横向惯性效应的存在会使桩中的波速减小,土的性质对波速影响不大;反演精度与缺陷的性质、激振条件有关。
- 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?