分离密度

Simulation results of gas membrane separation operating in countercurrent show good agreements with experimental results.

中空纤维式分离器因其装填密度大、耐压性能好，因而在实际的气体分离过程得到广泛的应用。

The main job and contribution of this paper are as follows:Based on narrowband signal processing, we propose a new method for FH signal blind detection and blind parameter estimation. Firstly, compute the cross-correlation function of FH signals from multichannels, then we get the cross power spectral density matrixCSDM Secondly, select the hops of FH signals from the CSDM via processing and analyzing the CSDM, meanwhile reduce the influence coming from noise, fixed frequency signal and other interferences; Lastly, estimating the DOA of every hop and according to the DOA, we can separate the hops, get the number of FH signals and their parameters. Propose a new method for designing the threshold in FH signal detection. This method makes it easy to get the threshold by theoretic computing and it can extremely reduce the interference of non-FH signals.Based on broadband signal processing, we propose a new method for FH signal blind detection and blind parameter estimation. Firstly, get the DOA of the signals by wideband spatial spectrum estimation; secondly, separate the signals by spatial filtering using wideband beamformer; Lastly, we propose two methods for FH signal blind detection and blind parameter estimation, one is for several constant hop-rate FH signals whose dwell-time are different and another is for a single FH signal whose hop-rate is alterable.By employing spatial interpolation in broadband signal beamforming, it can reduce the number of antenna elements and corresponding RF modules, A/D converters, etc. It can also eliminate the mutual coupling between antenna elements while getting the narrower main beamwidth and lower sidelobe level.

本文的主要研究工作和贡献如下：●提出了一种基于窄带处理的FH信号盲检测和参数盲估计的实现方法，即首先求出多路信号之间的互相关，进而得到互功率谱密度矩阵，然后通过对CSDM进行对折处理来抑制噪声、定频信号及其他干扰的影响，并将所有属于FH信号的hop(每一跳的驻留时间在时频图上持续的线段)从CSDM中筛选出来，最后用阵列信号处理中的到达方向估计理论在频域中估计出各个hop的方向参数，利用方位信息完成FH信号分离并得到FH信号的数目及其各自的参数集；●提出了一种确定FH信号检测门限的策略，该策略不仅使得检测门限能够通过理论计算得到，而且还显著地抑制了非跳频信号的干扰，从而能有效地检测出FH信号；●提出了一种基于宽带处理的短波FH信号盲检测和参数盲估计的实现方法，即首先利用宽带空间谱测向技术得到接收信号的DOA，然后采用宽带波束形成技术对特定方向进行空间滤波，实现多个信号的分离，最后分别提出了两种FH信号的盲检测和参数盲估计方法，第一种方法适用于空间某个特定方向上存在着几个驻留时间不同的恒跳速FH信号和其他干扰信号的混合信号，第二种方法适用于空间某个特定方向上仅含一个可变跳速的FH信号和噪声的混合信号；●将空间插值的概念和宽带波束形成技术结合起来，提出了一种基于频域处理的宽带恒定束宽的波束形成方法。

Considering the real speech mixture model could be nonlinear-convolution mixture model, the author presents a new nonlinear speech separation algorithm by utilizing the Finite Impulse Response neural network and the GMM pdf estimation, based on the feedback architecture and the Maximum Likelihood principle.

考虑到真实多通道语音分离系统的输入混合语音有可能是不同语音源信号的非线性混合而不是简单的线性混合，基于反馈结构，采用GMM概率密度函数估计方法，作者提出了一种采用有限冲激响应神经网络的非线性、卷积混合盲信号处理语音分离批处理新算法。

Mol·L~(-1) individually and also with both heavy metals present. Plasmolysis, concentrated cytoplasm, disappear ance of the cristae of mitochondria, ambiguity of framework and destruction of mitochondria envelope were all symptoms of root cells under Cu stress; hollowing cells was also found in Cd treatment, and there existed some different granule in these hollowing cells.

铜使根细胞产生质壁分离、细胞质浓缩、部分细胞空泡化，使线粒体脊突消失、结构模糊、外膜破坏；镉使根细胞空泡化，并在部分空泡化的细胞里产生大小不等的颗粒状物；铜、镉交互污染使根细胞受害程度加深，并兼有两者的受害症状特征：线粒体结构彻底破坏、空泡化细胞里的颗粒物更大电子密度更高、质壁分离现象更普遍、质膜上的颗粒物沉淀更大。

Methods Proteins existed in adult Schistosoma japonicum membrane were extracted by Triton X-100 and purified through reverse-phase high performance liquid chromatography,and the main protein peaks were then collected separately. 125 I-LDL of human plasma as the ligand, through the radioautography and radioligand binding assay, the protein which can bind human serum 125 I-LDL specifically was identified.

自人工感染家兔的肠系膜下静脉取日本血吸虫成虫，用非离子去污剂TritonX 10 0抽提出日本血吸虫成虫表膜蛋白，反相高效液相色谱进行分离纯化后，收集各主要分离蛋白峰，以12 5I标记的人血浆低密度脂蛋白作为放射性配体，经放射性自显影及放射性受体配体结合分析鉴定能与人血浆12 5I LDL特异结合的蛋白。

Since I joined the institute, my efforts have been mainly contributed to set up the RNA platform with the large-scale zonal gradient ultracentrifuge isolation system and reverse-phase HPLC system. At the meantime, I set up the in vitro translation system as the working method to study the ribosome and the translational factor LepA(EF4) functionally and structurally.

同时，主持所RNA平台建设，在此基础上建立了大规模密度梯度分离技术平台、反向HPLC的RNA分离技术平台，在实验方法上建立起了蛋白质体外表达平台，在体外研究翻译过程的每个步骤、每种因子，从微观上认识蛋白质翻译过程的机制。

The A and B components remanent magnetization were loaded by goethite and maghemite respectively, the C component remanent magnetization was carried by the magnetite in the sandstones and were loaded conjunctly by the magnetite and hematite in the mudstones and muddy sandstones.

它们的存在并不影响岩石原生剩磁的分离，也不影响原生剩磁信号的稳定性和获得的古地磁数据的可靠性。16个砂岩采点中不能分离出C分量，是由于后生的赤铁矿彻底改变了由磁铁矿携带的原生剩磁组分，在高密度采样的情况下剔除这些采点并不影响古地磁极性柱的构建和解释。

The paper studies mainly the separation and recovery of low -concentration sodium sulfate - acetic acid-water system in the laboratory and probes into how varied factors affect the electrodialyzer' s limited electricity current density and in separating process performance.

本课题在实验室范围内，对低浓度硫酸钠—乙酸—水物系电渗析分离过程进行了研究，并就各种因素对电渗析器的极限电流密度和分离过程性能的影响进行了探讨。

Depositing cells were incubated in high-sugar DMEM culture medium containing 15% fetal bovine serum, 100 U/mL penicillin, and 100 U/mL Streptomycin, then cells were seeded in a 25 T culture bottle after cell density was adjusted to 1×109 L-1, and incubated at 37 ℃, 0.05 volume fraction CO2 with saturated humidity. After 72 hours, the culture medium was replaced, and red blood cells and other nonadherent cells were removed. Cells began to passage at 70%-80% confluence.

实验方法：穿刺抽取15 mL脐带血，密度梯度法分离吸取分层界面的白色环形絮状物，其中富含单个核细胞，离心后沉积细胞用含15％胎牛血清、100 U/mL青霉素、100 U/mL链霉素的DMEM高糖培养基悬浮，调整细胞密度为1×109 L-1接种于25 T培养瓶内，放置在37 ℃、体积分数为0.05的CO2饱和湿度培养箱中培养，72 h后更换培养基，去除红细胞及其他未贴壁细胞，至70％~80％融合时传代。

The method comprises the steps of taking the amur silvergrass as a plant fiber raw material; cutting and pulverizing; separating fibers; applying adhesives, such as lauxite, etc., a water proof agent and other additives to the fibers; drying until the water content is 7%-11% in a dryer; laying into slabs with uniform thickness and density by using a felting machine; and manufacturing the medium density fiberboards through the procedures in a single layer and multi-layer flat-bed press.

以荻草为植物纤维原料，经切断粉碎、纤维分离、纤维施加脲醛树脂等胶粘剂、防水剂和其它添加剂后在干燥机中干燥到含水率7％-11％，经铺装机铺装成厚度、密度均匀的板坯，在单层和多层平板热压机中热压等工序制成中密度纤维板。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。