光密度

Experiment result indicates that laser power density,welding speed,pulse frequency and pulse width are the key factors of pulse laser welding and that the polishment,close touch of butt joint faces have an important effect on the air vents number in welding line and the mechanical performance of welding line.

实验结果表明：对焊面的打磨、抛光和紧密接触对防止焊缝中产生过多的气孔和提高焊缝的机械性能有重要作用；激光功率密度、焊接速度、脉冲宽度和脉冲频率四个参数是实现脉冲激光焊接的关键因素。

High-tech, high density screen high strength low protrudent screen and antistatic screen, calendering and other special handling screen and pet high eye screen is required for imports.

技术含量高的高密度丝网，高强低伸丝网、防静电丝网、轧光等特殊处理丝网和涤纶高目丝网均需进口。

We found that the reduced cell density and pseudopodia compared with control indicated the inhibition of cell growth and poor movement after IFN α-2b treatment.

采用光镜、电镜观察该细胞在含不同浓度干扰素α-2b 培养液中的生长形态和粘附移动能力。结果：干扰素α-2b 能够使该细胞生长密度降低、伪足收缩、细胞变圆、移动能力减弱。

The light fastness of pyrazolone coupled acid azo dyes has the relationship with 5 independent factors:the NK N2 charge (E-N1 E-N2),the dipole moment,the frontier orbit energy. The equation revealing the relationship was founded.

以吡唑啉酮为偶合组份的偶氮型酸性染料在羊毛纤维上的光牢度主要与下述5个分子结构独立因素有关：N1、N2上的电荷密度（E-N1、E-N2，分子偶极矩（μ，前线轨道的能量Ehomo、Elumo），并建立线性关系式。

①Rat MSC and VSMC were cultured and identified, respectively. MSC were labeled with DAPI firstly, and then co-cultivated with VSMC. The changes of morphology and ultrastructure of co-cultured cells were observed. Immunfluorescence analysis was performed by using monoclonal antibodies against specific antigen.②We established the regulatable system in two steps: a stable MSC line expressing rtTA has been constructed and characterized firstly by transfected with pUHD 17-1hyg and then selected by hygromycin B; in a second step, this line was used for trandfer the AT2R gene to MSC to get the well establishing double stable MSC lines;③The expression of AT2R regulated by doxycycline was evaluated by western blot;④The MSCs were transduced into rat carotid arteries with regulatable AT2R gene after the establishment of rat carotid balloon injury restenosis model. The intimal/medial area ratio were measured by digital analysis system.

研究方法：(1)密度梯度离心法及胶原酶消化法分别培养原代大鼠MSC及VSMC，细胞共培养并行免疫荧光化学染色和透射电镜观察超微结构；(2)组成受Dox调控的哺乳动物表达系统的四种成分的转化、扩增及提纯并酶切鉴定；(3)采用常规分子生物学方法连续两个回合转染体外培养的MSC，并分别采用发光计检测不同细胞克隆萤光素酶活性改变以及RT-PCR方法检测AT2R目的基因mRNA表达情况，根据各个细胞克隆受Dox调控表达的程度，选择低背景、高诱导表达AT2R的细胞系，作为双重稳定MSC细胞系；蛋白免疫印迹法观察该细胞系在Dox调控下AT2R表达的时相性、持续性及在不同浓度Dox调控下的表达情况；(4)建立大鼠颈动脉球囊损伤动物模型，将双重稳定MSC在术中导入血管，分别于14 d、28 d进行病理切片，检测可调控AT2R对新生内膜增生的影响；采用RT-PCR免疫组织化学免疫荧光等技术观察AT2R基因在新生内膜中的表达以及细胞外基质成分表达的改变，TUNEL法检测血管组织中细胞凋亡的变化情况。

Potential solutions of the manufacturing problem include hardening the film solidness or balancing the exposure density.

根据之前的理论研究，解决方案包括增加光刻胶膜的坚硬度或者均衡曝光图形的密度。

Light quality affected the stomatic characteristics in ginger leaves. The upper cuticle stomatic density, stomatic width and stomatal aperture width under green film was the highest than those of others.

生姜生长的光质环境显著影响了气孔形态特征，绿膜覆盖生姜叶片上表皮气孔密度、气孔宽度、气孔孔径宽度较其他处理大。

Of the recording media using scanning probe microscope, including scanning tunneling microscope, atomic force microscope, scanning near-field optical microscopy, etc., nanometer-scale data storge can be successfully achieved, and this technology has been considered as one of the best way to promote the storage density.

扫描探针显微技术通过改变材料的光、电、磁等局域特性可以实现纳米尺度的信息存储，成为提高信息存储密度的最有效手段之一。

The energy spectra of hot electrons have been measured using the magnetic spectrometers, fitted with the LiF thermoluminescent dosimeter which were calibrated using Cs~(137)γ-ray sources, in the interaction of a 130 mJ, 60 fs, 800 nm, 1∶10~(-6), 7.0×10~(17) W·cm~(-2) P-polarized laser incidence on Cu foil target at an angle of 45° with respect to the target normal without any prepulse.

在激光能量130mJ，脉宽60fs，波长800nm，对比度1∶10-6，激光与靶法线成45°夹角， P偏振，靶面激光峰值功率密度约为7.0×1017W·cm-2，无预脉冲的条件下，采用电子谱仪与经γ标准源标定的LiF热释光探测器相配合，测量了飞秒激光薄膜靶相互作用中产生的超热电子能谱。

A metastable helium atomic beam effused out of atom source is firstly cooled transversally by laser. This well-collimated atomic beam traveling through the light standing-wave whose direction is perpendicular to atomic beam is quenched, and channeling effect happens in atomic density distribution.

亚稳态原子束从原子源喷出后首先对其进行横向激光冷却，准直后的原子束穿过与之垂直的激光驻波场时发生淬火过程，原子的密度分布出现沟道化效应，给出基于光掩模制作纳米图形的基本原理、理论分析及模拟结果。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。