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- The 3n ASCC fed in pond can not only rearch sexual maturity ,but be reproduced. 池塘中饲养的雄核发育异育银鲫性腺不仅能成熟,而且也能生殖。
- The diamond films doped with boron were synthesized on the Si 3N 4 substrate by microwave plasma CVD method (MPCVD). 采用微波等离子体化学气相沉积 ( MPCVD)的方法在 Si3N4 基片上制作了掺硼金刚石薄膜。
- Ultra-thin Si 3N 4/SiO 2(N/O) stack gate dielectric with EOT of 2.1nm is fabricated successfully,and its characteristics are investigated. 成功制备了EOT(equivalentoxidethickness)为 2 1nm的Si3 N4/SiO2 (N/O)stack栅介质 ;并对其性质进行了研究 .
- Firstly, native 2N and 3N Gd are used to try to repeat the magnetocaloric properties of GdsSi2Ge2 alloy reported by scientists of Ames Lab (AL). 针对近年来国际上取得突破性进展的GdSiGe系合金,首先以国产2N级和3N级金属Gd为原料,对Gd_5Si_2Ge_2合金的一级磁相变和巨磁热效应的重现性进行了研究;
- Si?3N?4 has a higher dielectric constant, k, than that of SiO?2. New model and material parameters were added to 2?D device simulator PISCES?II. 使用Si3N4材料作为栅介质,利用其介电常数高于SiO2的特性,可以在一定时期内有效地解决隧穿电流的问题。
- The Riemann manifold and the Quasi-Riemann manifold are given in 3N dimensional Euclid space and its l-order tangential space respectively. 在3N 维 Euclid 空间及其一阶切空间中,分别给定Riemann 流形及准 Riemann 流形。
- It is proved that electroless composite plating Ni P Si 3N 4 on piston ring is a new technology,which is worth application and dissemination. 结果表明:活塞环化学复合镀Ni-P-Si3N4是一种值得推广应用的新型工艺方法。
- Thermodynamic analyses for the superhard inorganic material, such as SiC, Si 3N 4,TiC,TiN and so on, nanosized powder CVD synthesis processes were made systematically. 通过热力学分析研究了超硬无机材料,如SiC、Si3N4、TiC、TiN等纳米粉末的化学气相沉积(CVD)合成反应过程和核化过程的有关热力学规律。
- Current research on these materials concentrates on diamond, cubic boron nitri de(cBN), carbon nitride(C 3N 4, CN x), boron carbonitride(BCN)and diamond like carbon(DLC). 新型超硬薄膜材料研究从金刚石开始 ;目前主要的研究对象有金刚石、类金刚石碳 (DLC)、立方氮化硼 (cBN)、氮化碳 (C3N4 ;CNx)、硼碳氮 (BCN)等 ;是近二十年来材料研究的热门方向之一 .
- Research results show that composite aids are more effective than single aids to sintered Si 3N 4 ceramics, in which the rare-earth oxides and MgO-Al 2O 3-SiO 2 composite aids are more attractive. 研究表明 ,多组分助剂比单一组分助剂对氮化硅的助烧效果好 ,其中稀土氧化物和MgO -Al2 O3 -SiO2 体系比较受重视
- The results showed that, adding P into BN Mg system can obtain crystals without free carbon, while adding LiH and NH 4Cl into Li 3N BN system can obtain CBN crystals of high strength and high thermal stability. 研究表明 ,结晶介质成分和合成参数一样 ,对立方氮化硼结晶的完整性 ,杂质成分对晶体特性的影响起着重要的作用 ,指出 ,往BN -Mg体系中 ,引入P可培育出不含游离硼的晶体 ,而往Li3N -BN体系中引入LiH和NH4 Cl时 ,所得到的立方氮化硼具有高的强度和热稳定性。
- On the basis of applying second-order tangential space and Riemann space in 3N dimension Euclid space [4], the writers have derived the integral variati- onal principles in Riemann form for first-order and second-order non- holonomic dynamical systems. 本文在引进3N维Euclid基本空间的二阶切空间及Riemann空间中,提出一、二阶非完整力学系统的积分变分原理的Riemann形式。
- For sake of probing the possibility of CVD at room temperature by way of laser plasma assisted technique, a new style of CVD device has been designed and manufactured, and was used on practical preparation of Si 3N 4 film from SiH 4 NH 3 N 2 system. 为探索用激光和等离子体共同辅助化学气相沉积(CVD)过程以实现室温沉积的可能性,设计并制造了一种新型的CVD装置,实际进行了由SiH4-NH3-N2体系制取Si3N4膜的试验。
- The esterfication of 8 with cinnamyl chloride in DMAP,Et 3N gave the esters 9.Acid hydrolysis of the acetone protecting group of 9 in 75% aq. HOAc gave compounds 8-O- cinnamyl-dihydrogoniotriol. 然后化合物 8与肉桂酰氯反应得化合物 9,在经 75%25的醋酸水溶液水解得 8-O -肉桂酰基 -dihydrogoniotriol。
- The studies of IR and Raman show that there are Si-N ,Si-H,N-H,Si-O-Si bonds in a Si 3N 4.An analysis of Raman spectra of a Si 3N 4 for thermal treatment in various temperature and atmosphere are made. 红外吸收和拉曼光谱研究表明,a-Si3N4纳米粒子中存在Si-N,Si-H,N-H,Si-O-Si键,分析了a-Si3N4纳米粒子在不同的温度和气氛退火后的变化情况。
- Meanwhile,backcrossing females 3n AASCC (F 1- similar to ASCC) to faternal parent 3n=156 ASCC could produce first backcross generation (B 1 ASCC being very similar to faternal parent ASCC). 它与父本异育银鲫回交可以产生回交子一代 (B1)。 雄核发育异育银鲫、回交子一代异育银鲫与父本异育银鲫非常相似。
- The fracture surface of the Si?3N?4/Al interface has been analyzed by SEM and EDXA methods,and the results prove that the fracture pattern of Si?3N?4/Al interface belongs to interface brittle debonding. ? 用SEM和EDXA方法研究了Si3N4/Al界面的断口。 结果表明,Si3N4/Al界面的断裂模式属于界面脆性剥离。
- It is a finite impulse response (FIR) digital filter, and its order is N/3(N is the sampling number in a period). The direct current in i P(i Q) can pass through this filter damplessly, while 3n harmonics damp thoroughly. 该滤波器具有线性相位的有限冲激响应 (FIR)数字滤波器 ,阶次为N/3(N为一个周期的采样点数 ) ,可使iP(iQ)的直流分量无衰减地通过 ,而 3n次谐波处的幅值衰减为0。
- It is found that if we can keep the enough HRT and special ratio of NO - 3N/NH 3N, the denitrification process can be finished in the aerobiosis segment of the A/O process without refluencing to anoxic segment of the A/O process. 发现只要保证足够的水力停留时间和进水中一定的硝态氮与氨氮比 ,利用膜法A/O工艺的好氧段完全可以满足脱氮的要求 ,而并不需要回流在A段进行反硝化作用。
- Meanwhile,backcrossing females 3n AASCC (F1- similar to ASCC) to faternal parent 3n=156 ASCC could produce first backcross generation (B1 ASCC being very similar to faternal parent ASCC). 它与父本异育银鲫回交可以产生回交子一代(B1)。雄核发育异育银鲫、回交子一代异育银鲫与父本异育银鲫非常相似。