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| 1 | Systematic centroid error compensation for the simple Gaussian PSF in an electronic star map simulator显示文摘Simulated star maps serve as convenient inputs for the test of a star sensor, whose standardability mostly depends on the centroid precision of the simulated star image, so it is necessary to accomplish systematic error compensation for the simple Gaussian PSF(or SPSF, in which PSF denotes point spread function). Firstly, the error mechanism of the SPSF is described, the reason of centroid deviations of the simulated star images based on SPSF lies in the unreasonable sampling positions(the centers of the covered pixels) of the Gaussian probability density function. Then in reference to the IPSF simulated star image spots regarded as ideal ones, and by means of normalization and numerical fitting, the pixel center offset function expressions are got, so the systematic centroid error compensation can be executed simply by substituting the pixel central position with the offset position in the SPSF. Finally, the centroid precision tests are conducted for the three big error cases of Gaussian radius r = 0.5, 0.6, 0.671 pixel, and the centroid accuracy with the compensated SPSF(when r = 0.5) is improved to 2.83 times that of the primitive SPSF, reaching a 0.008 pixel error, an equivalent level of the IPSF. Besides its simplicity, the compensated SPSF further increases both the shape similarity and the centroid precision of simulated star images, which helps to improve the image quality and the standardability of the outputs of an electronic star map simulator(ESS). | Wang Haiyong Wang Yonghai Li Zhifeng Song Zhenfei | 2014 | Chinese Journal of Aeronautics2014，27，4： | 3 |
| 2 | Didodecyldimethylammonium bromide lipid bilayer-protected gold nanoparticles:synthesis,characterization,and self-assembly显示文摘 | ZHANG Lixue SUN Xuping SONG Yonghai | 2006 | Langmuir2006，22，6： | 1 |
| 3 | Determination of tetracycline in milk by using nucleotide/lanthanide coordination polymer-based ternary complex显示文摘 | Hongliang Tan Chanjiao Ma Yonghai Song Fugang Xu Shouhui Chen Li Wang | 2013 | Biosensors and Bioelectronics2013，，： | 1 |
| 4 | A novel hy- drogen peroxide sensor based on horseradish peroxidase immobilized in DNA films on a gold electrode显示文摘 | Yonghai Song Li Wang Chunbo Ren eta | 2006 | Sen- sors and Actuators B: Chemical2006，114，2： | 1 |
| 5 | A hydrogen peroxide sensor based on electrochemically roughened silverelectrodes显示文摘 | Li Wang Yonghai Song Wenping Lian | 2009 | Electrochimica Acta2009，54，： | 1 |
| 6 | Determination of tetracycline in milk by using nucleotide/lanthanide coordination polymer-based ternary complex显示文摘 | Hongliang Tan Chanjiao Ma Yonghai Song Fugang Xu Shouhui Chen Li Wang | 2013 | Biosensors and Bioelectronics2013，，： | 1 |
| 7 | An effective layer- by-layer adsorption and polymerization method to the fabrica- tion of polyoxometalate-poly pyrrole nanoparticle ultrathin films显示文摘 | Lan Yang Wang Enbo Song Yonghai | 2006 | Polymer2006，47，： | 1 |
| 8 | Characterization and property of DNA incorporated bilayer lipid membranes显示文摘 | Tong Yuehong Han Xiaojun Song Yonghai | 2003 | Biophys Chem2003，105，： | 1 |
| 9 | Lanthanide-functionalized silver nanoparticles for detection of an anthrax biomarker and test paper fabrication显示文摘 | Hongliang Tan Qian Li Chanjiao Ma Yonghai Song Fugang Xu Shouhui Chen Li Wang | 2014 | Journal of Nanoparticle Research2014，，1： | 1 |
| 10 | A STABILIZED EQUAL-ORDER FINITE VOLUME METHOD FOR THE STOKES EQUATIONS显示文摘我们为 Stokes 方程在矩形的格子上构造一个新稳定的有限体积方法。最低相等顺序的一致有限元素对(piecewise 双线性的速度和压力) 并且为速度和压力的 piecewise 常数测试空格在这个方法被采用。我们显示出这个方法的稳定性并且在 L2 标准在 H1 标准和压力为速度证明集中的第一最佳的率。另外,第二命令为在 L2 标准的速度的最佳的错误估计被导出。说明理论结果的数字实验被包括。 | Wanfu Tian Liqiu Song Yonghai Li | 2012 | Journal of Computational Mathematics2012，30，6： | 0 |
| 11 | Evolutionarily conserved boule and dazl identify germ cells of Coilia nasus显示文摘Coilia nasus is an endangered fish species in the Yangtze River,and there is urgent need to know the genes related to its reproduction and fertility.The DAZ family including boule,daz and dazl,plays an important role in germ cells development.In this study,the cDNA sequence of boule(Cnbol)and dazl(Cndazl)genes were cloned and their expression patterns were characterized in Coilia nasus.RT-PCR showed that the expression of Cnbol and Cndazl mRNAs was restricted in adult gonads.The section in situ hybridization indicated that the temporospatial expression patterns of Cnbol and Cndazl were significantly different.In the testis,Cnbol was mainly detected in spermatocytes and spermatids,while Cndazl was prominently expressed in s permatogonia.In the ovary,Cnbol and Cndazl were highly expressed in the early stages of oocytes.Interestingly,Cndazl was also concentrated in perinuclear speckle and then localized to the Balbiani body in late stages of oocytes.In addition,Cnbol and Cndazl 3′UTR can specifically label medaka Primordial Germ Cells(PGCs).According to our results,Cnbol and Cndazl are marker genes of germ cells and may play a vital role in the development and differentiation of germ cells in Coilia nasus. | Xiao Chen Peng Song Jiao Xia Jing Guo Yonghai Shi Ying Zhong Mingyou Li | 2023 | Aquaculture and Fisheries2023，8，3： | 0 |
| 12 | Synergistic effects of brain-derived neurotrophic factor and retinoic acid on inducing the differentiation of bone marrow stromal cells into neuron-like cells in adult rats in vitro显示文摘BACKGROUND: Under induction of retinoic acid (RA), bone marrow stromal cells (BMSCs) can differentiate into nerve cells or neuron-like cells, which do not survive for a long time, so those are restricted to an application. Other neurotrophic factors can also differentiate into neuronal cells through inducing BMSCs; especially, brain-derived neurotrophic factor (BDNF) can delay natural death of neurons and play a key role in survival and growth of neurons. The combination of them is beneficial for differentiation of BMSCs. OBJECTIVE: To investigate the effects of BDNF combining with RA on inducing differentiation of BMSCs to nerve cells of adult rats and compare the results between common medium group and single BDNF group. DESIGN: Randomized controlled animal study.SETTING: Department of Neurology, Affiliated Hospital of Xuzhou Medical College. MATERIALS: The experiment was carried out in the Clinical Neurological Laboratory of Xuzhou Medical College from September 2003 to April 2005. A total of 24 SD rats, of either gender, 2 months old, weighing 130-150 g, were provided by Experimental Animal Center of Xuzhou Medical College [certification: SYXK (su) 2002-0038]. Materials and reagents: low-glucose DMEM medium, bovine serum, BDNF, RA, trypsin, separating medium of lymphocyte, monoclonal antibody of mouse-anti-nestin, neuro-specific enolase, glial fibrillary acidic protein (GFAP) antibody, SABC kit, and diaminobenzidine (DAB) color agent. All these mentioned above were mainly provided by SIGMA Company, GIBCO Company and Boshide Company. METHODS: Bone marrow of SD rats was selected for density gradient centrifugation. BMSCs were undertaken primary culture and subculture; and then, those cells were induced respectively in various mediums in total of 3 groups, including control group (primary culture), BDNF group (20 μg/L BDNF) and BDNF+RA group (20 μg/L BDNF plus 20 μg/L RA). On the 3rd and the 7th days after induction, BMSCs were stained immunocytochemically with nestin (sign of nerve stem cells), neuron-specific enolase (NSE, sign of diagnosing neurons) and GFAP (diagnosing astrocyte), and evaluated cellular property. MAIN OUTCOME MEASURES: Induction and differentiation in vitro of BMSCs in 3 groups. RESULTS: ① Induction and differentiation of BMSCs: Seven days after induction, cells having 2 or more apophyses were observed. Soma shaped like angle or erose form, which were similar to neurons and glial cells having strong refraction. ② Results of immunocytochemical detection: Three days after induction, rate of positive cells in BDNF+RA group was higher than that in BDNF group and control group [(86.15±4.58)%, (65.43±4.23)%, (4.18±1.09)%, P < 0.01]. Seven days after induction, rate of positive cells was lower in BDNF group and BDNF+RA group than that in both groups at 3 days after induction [(31.12±3.18)%, (29.35±2.69)%, P < 0.01]; however, amounts of positive cells of NSE and GFAP were higher than those at 3 days after induction (P < 0.01); meanwhile, the amount in BDNF+RA group was remarkably higher than that in BDNF group (P < 0.01). CONCLUSION: Combination of BDNF and RA can cooperate differentiation of BMSCs into neurons and astrocyte, and the effect is superior to single usage of BDNF. | Yonghai Liu Yucheng Song Zunsheng Zhang Xia Shen | 2006 | Neural Regeneration Research2006，1，4： | 0 |
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