But with the development of modern high technolgy war, traditional HF communication is threatened by modern electronic countermeasures, so it is very useful to develop efficient anti-jamming measures in HF communicaiton.
但是随着现代高科技战争的发展，传统的短波通信很难摆脱现代电子对抗技术的威胁，因此发展抗干扰、抗窃听、抗截获等目标的短波通信系统就变得尤为重要。
The influence of different calculation methods and basis sets of Au on the calculation results were also discussed systematically.
对计算结果分析表明，不同计算方法对Au配合物结构和二阶NLO系数影响较大，其中用考虑电子相关效应的DFT-B3LYP和MP2方法优化得到的Au—P配键长比用HF方法的短，相应的二阶NLO系数比HF方法的大2倍左右；同一计算方法下，Au基组中 d 轨道个数增加优化得到的Au—P配键键长减小；随着Au基组的增大，前线分子轨道能级差减小，其中SDD和CEP-121G基组之间的变化更明显。
A perpendicular magnetic recording disk has an improved recording layer of a granular CoPtCr-based ferromagnetic alloy with inter-granular material made up of one or more oxides of Cr and one or more oxides of one or more of a segregant of Si, Ta, Ti, B, Nb or Hf, wherein the amount of oxygen present in the recording layer is greater than about 22 atomic percent and less than about 35 atomic percent.
本发明提供一种垂直磁记录盘，其具有改进的具有颗粒间材料的颗粒CoPtCr基铁磁合金的记录层，颗粒间材料由Cr的一种或更多氧化物及Si、Ta、Ti、B、Nb或Hf分离子中的一种或更多种的一种或更多种氧化物构成，其中记录层中出现的氧的量大于约22个原子百分比并且小于约35个原子百分比。
Trace element exhibits enrichment of LREE and antipathic elements. Trace element spidergram of obvious right deviation and extremely high containing of Sr, Zr and Hf are different from the negative anomaly of dunite which lies the bottom of ophiolite, but has weak positive anomaly.
微量元素显示LREE和不相容元素的富集，右倾的微量元素分布模式，异常高的Sr含量，Zr、Hf不同于蛇绿岩底部纯橄榄岩的负异常，而显示出微弱正异常，这些特征都与经典蛇绿岩层序底部的地幔橄榄岩不同。
The matrix is a proliferative zone located at the proximal end of the HF surrounding the dermal papilla.
除外根鞘外，毛干、内根鞘都是由毛母质细胞分化而来的。
Results Both time and frequency domain indexeshad a decreasing trend with the worsening of ventricular arhythmia. There was a weak negative corelation between time domain indexes(SDNN, SDANN, ASDNN or PNN50) and ventricular arhythmia (P.05).The result of logistic regression indicates that SDANN was a protective factor.
结果 EH者HRV各项时域指标和频域指标中的LF、VLF、HF均较B组显著降低，并有随着VA程度的加重而降低的趋势；时域指标中的SDNN、SDANN、ASDNN、PNN50与VA程度呈弱负相关(P.05)；SDANN为EH者VA的保护因素。
After WCG, in SW2, he said no LS, but I didn't get use to that, for in notional matches or in Asian Ladder, or in HF(a favourite game platform in China), people never agreed to play without it. So I told him to let us decide the map first, and the result was EI at that moment. Both of us were glad.
WCG后SW2上他说了要去掉闪电盾，我当时就很不习惯，因为无论是在中国的比赛还是在亚洲BN上的练习赛，就是在HF上打，也从没有人说过要去掉这个东西，所以我很不习惯，我就告诉他我们先决定地图吧，当时决出来的地图是EI。
Monofilm of silane on the surface of the glass substrates is prepared via the method of self-assembled monolayers, Hf (SO4)24H2O and HCI are used as raw materials, HfO2 thin films are prepared on the active groups of the alkyl silane by the liquid phase deposition.
利用自组装单层膜技术，在玻璃基板上生长有机硅烷单分子膜层，以Hf(SO4)24H2O和HCI配制HfO2前驱液，通过液相沉积在硅烷的功能性官能团上诱导生成二氧化铪薄膜。
BNP will become one of the first examinations to the patients with heart failure.
BNP可做为HF的首选检查之一，是诊断心衰的一项重要指标，有广泛的应用价值。
Density Functional Theory method was used to optimize the geometries of 209 PCDE molecules, 209 PBDE molecules and 75 PCDD molecules at the B3LYP/6-31G* level. Using computed structural parameters as theoretical descriptors, the forward stepwise multiple regression technique was adopted to obtain QSPR models of environmental partition properties for these POPs by using GQSARF 2.0 and SPSS12.0 for windows programs. The obtained QSPR models are as follows:(1) QSPR models for predicting subcooled liquid vapor pressure, n-octanol/water partition coefficients lgK_(ow and subcooled liquid water solubilities -lgS_(w, l of PCDEs, of which correlative coefficients (R~2) are 0.988, 0.958 and 0.959 and the root-mean-square-error of estimation are 0.134, 0.116 and 0.327 respectively.(2) QSPR models of lgPL and n-octanol/air partition coefficients lgK_(oa for PBDEs, which both contain three structural parameters. The values of R2 for the two models are both 0.997 while the values of RMSEE are 0.073 and 0.062 respectively.(3) QSPR models of lgKow and–lgS_ for PCDEs, which both have one variable (mean molecular polarizability, α). The values of R~2 for the two models are 0.978 and 0.866 and the values of RMSEE are 0.300 and 0.270 respectively.(4) The molecular structures of 24 substituted naphthaline compounds were optimized using Hartree-Fock and DFT methods at four different levels and the same means was used to obtain four three-parameter (EHOMO, q~+ andα) QSPR models of lgK_. The model at the HF/6-311G** level is the best one of which R2 is 0.9662 and RMSEE is 0.380.(5) QSPR study for environmental partition properties of PCDEs was also performed using position of Cl substitution method in which simple parameters of substitution position were taken as descriptors. The multiple linear regression was performed with GQSARF 2.0 and SSPS 12.0 for windows programs to obtain QSPR models of lgP_L, lgK_ and–lgS_ for PCDEs of which R~2 are 0.991, 0.983 and 0.965 and RMSEE are 0.311, 0.100 and 0.300 respectively.
采用密度泛函理论方法在B3LYP/6-31G*水平上对PCDEs、PBDEs和PCDDs的分子结构进行了全优化计算，以计算得到的量子化学参数作为理论描述符，采用GQSARF 2.0和SPSS 12.0 for windows统计程序进行正向逐步回归分析，建立了这些POPs的环境分配性质的QSPR模型：(1) PCDEs的过冷液体蒸汽压、正辛醇/水分配系数lgK_(ow和水溶解度-lgS_(w，l的QSPR模型，这3个QSPR模型的相关系数(R2)分别为0.988、0.958和0.959，估计的均方根误差分别为0.134、0.116和0.327；(2) PBDEs的lgPL和正辛醇/空气分配系数lgK_(oa的QSPR模型，这两个模型都包含三个分子结构参数，其R~2都为0.997，RSMEE分别为0.073和0.062；(3) PCDDs类化合物的lgK_和-lgS_w的QSPR模型，两个模型都只含一个变量，其R~2分别为0.978和0.866，RSMEE分别为0.300和0.270；(4)采用Hartree-Fock和DFT方法，在4种不同水平上优化计算了24个取代萘系列化合物的分子结构，采用上述同样的方法分别建立了四种水平上的三变量lgK_模型，通过比较得到，在HF/6-311G**水平计算得到的模型最好，R为0.966，RSMEE为0.380；(5)同时，采用氯原子取代位置方法对PCDEs的环境分配性质进行QSPR研究，建立了PCDEs的lgPL、lgK_和-lgS_的QSPR模型，其R~2分别为0.991、0.983和0.965，RSMEE分别为0.110、0.100和0.300。
In one implementation, at least one of nickel silicide or cobalt silicide is exposed to a fluid comprising H2SO4, H2O2, H2O, and HF at a temperature of at least 50 DEG C. and at a pressure from 350 Torr to 1100 Torr effective to etch the at least one of nickel silicide or cobalt silicide from the substrate.
在一个实施方案中，在至少50℃的温度和350托到1100托的压力下，将硅化镍或硅化钴中的至少一种暴露于包含H2SO4、H2O2、H2O和HF的流体以有效蚀刻所述衬底中的所述硅化镍或硅化钴中的至少一种。
The application of HF - support roller oil on the support roller plain bearing liner of revolving kiln was introduced.
介绍了HF-托轮油在回转窑托轮轴瓦上的应用，成功地解决了回转窑托轮轴瓦在恶劣环境下润滑不良的状况，杜绝了轴瓦拉丝、发热和抱瓦现象，保证生产的正常进行。
Features 240 watts of bi-amped power, UFLC 25mm soft dome HF unit, 200mm LF woofer, separate HF gain control, overall volume control and a 0dB /-3dB /+3dB switch for the LF unit.
音频配备240W的双路功放，UFLC 25mm的高音单元，200mm的低音单元，分别的高音增益控制和整体音量控制。对低音单元还有0dB/-3dB/+3dB的选择开关。
In this dissertation, the effect that hafnium film has on the suppressing grid emission in pulsed-controlled grid traveling wave tubes has been studied, while the working mechanism of Hf films has been discussed.
本论文研究了脉冲栅控行波管中，Hf薄膜对抑制栅极电子发射所起的作用，讨论了Hf薄膜的工作机理。
Due to BaHfO_3 and Ba_2HfO_4 compounds and Ba-Hf diffusion, the Mo grid coated with Hf effectively reduced the electron-emission substances on the grid from the cathode, which reduced grid electron emission.
由于在阴极表面有了BaHfO3和Ba2HfO4化合物的形成以及Ba—Hf相互扩散这两种现象的发生才使得涂覆有Hf膜的栅能够有效地减少从阴极蒸发过来的电子发射物质，从而降低了栅的电子发射能力。
A serious of coating materials, such as metal Hf, Pt, carbon-like coating and SiC films, which have high work function, low second electron emission coefficicet, will be prepared on the control Mo grid to suppress the electron emission. The exitence, diffusion and co-function of emission substance on the grid, the influence of the coating on work function of the grid and the electron emitting characterics will be studied carefully by the method of analogous diodes, working life-time testing, evapouration testing and so on to understand the mechanism of the suppression of the electron emission.
本课题将在离子束技术抑制栅电子发射取得效果并成功应用的基础上，制备金属铪、铂镀层，类石墨以及SiC等高功函数、低二次电子发射系数的抑制栅电子发射的镀层材料，从创造和维持栅极表面高的功函数以抑制栅电子发射的基本概念出发，采用模拟二极管、原位蒸发测量法及长寿命试验和解剖法，深入研究和分析阴极发射物Ba/BaO及系统中的残留气体O，C等在各种不同的栅极镀层表面的滞留、扩散及相互作用行为及其对栅极功函数和电子发射性能的影响，从而了解镀层对抑制栅电子发射的作用原理及其失效机制，为发展新的长寿命无栅电子发射材料奠定理论和技术基础，为我国空间技术及国防建设作出贡献。
The invention relates to a method for making magnesium sulfite using boiler smoke, and its processing flow:(1) grinding magnesium oxide powder or magnesite into powder, mixing with water to prepare an absorbing agent pulp and feeding the pulp into a desulfurizing tower; (2) leading the boiler smoke into a desulfurizing preprocessing device, spraying with circulating water, lowering the smoke temperature, eliminating part of smoke dust, HCl, HF, and SO3 components; (3) in the desulfurizing tower, making in-smoke SO2 react with the absorbing agent pulp to produce MgSO3, controlling the temperature in the desulfurizing tower at 50 deg. C-55 deg. C, where the pH value of the circulating pulp is in the intervals of 5.0-6.8; (4) feeding the desulfurized waste solution into a depositing tank and a centrifugal machine for separation and dehydration so as to raise the solid phase content up to 50%-70%; (5) drying by hot air and obtaining the dry magnesium sulfite finished products.
一种利用锅炉烟气制取亚硫酸镁的方法，其工艺流程是：①将氧化镁粉或菱镁矿石研磨成粉末，配水制成吸收剂浆液，送入脱硫塔，②将锅炉烟气引入烟气脱硫预处理装置，经循环水喷淋，降低烟气温度，去除部分烟尘和HCl、HF、SO3成分，送入脱硫塔，③在脱硫塔中，烟气中的SO2与吸收剂浆液反应，生成MgSO3，控制脱硫塔内温度在50-55℃，循环浆液pH值在5.0-6.8区间，④将脱硫废液送入沉淀池和离心机分离脱水，以提高固相含量达到50-70％，⑤经热风干燥，得到干燥的亚硫酸镁成品。
The first hyperpolarizability and molecular frontier orbit properties of barbituric acid derivatives are studied at HF/6-31G level by coupled perturbed Hartree-Fock method.
采用耦合微扰方法在HF/6-31G水平上对巴比妥酸衍生物的第一超极化率和分子前线轨道性质进行了计算。
Wanshicheng has exquisite craft, advanced plating assembly line, stamping machine, HF welding machine and other relevant equipment.
万事成具备精雕细琢的工艺，先进的电镀流水线，压机冲床，高频焊机等整套高水准工艺设备。
A model of cascade and overlay was established to explain the coacervation of the colloidal granules.
并对不同掺F量的多孔氧化硅薄膜的Ⅰ-Ⅴ特性和隙态密度进行了分析，发现少量HF的加入会优化薄膜的性质，而多余HF的加入会使得薄膜性质变差。