|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Precise orbit determination of Beidou Satellites with precise positioning显示文摘Chinese Beidou satellite navigation system constellation currently consists of eight Beidou satellites and can provide preliminary service of navigation and positioning in the Asia-Pacific Region.Based on the self-developed software Position And Navigation Data Analysis(PANDA) and Beidou Experimental Tracking Stations (BETS),which are built by Wuhan University,the study of Beidou precise orbit determination,static precise point positioning (PPP),and high precision relative positioning,and differential positioning are carried out comprehensively.Results show that the radial precision of the Beidou satellite orbit determination is better than 10 centimeters.The RMS of static PPP can reach several centimeters to even millimeters for baseline relative positioning.The precision of kinematic pseudo-range differential positioning and RTK mode positioning are 2-4 m and 5-10 cm respectively,which are close to the level of GPS precise positioning.Research in this paper verifies that,with support of ground reference station network,Beidou satellite navigation system can provide precise positioning from several decimeters to meters in the wide area and several centimeters in the regional area.These promising results would be helpful for the implementation and applications of Beidou satellite navigation system. | SHI Chuang ZHAO QiLe LI Min TANG WeiMing HU ZhiGang LOU YiDong ZHANG HongPing NIU XiaoJi LIU JingNan | 2012 | Science China Earth Sciences2012，55，7： | 61 |
| 2 | Wharton's jelly mesenchymal stem cells differentiate into retinal progenitor cells显示文摘Human Wharton's jelly mesenchymal stem cells were isolated from fetal umbilical cord. Cells were cultured in serum-free neural stem cell-conditioned medium or neural stem cell-conditioned medium supplemented with Dkk-1, a Wnt/β catenin pathway antagonist, and LeftyA, a Nodal signaling pathway antagonist to induce differentiation into retinal progenitor cells. Inverted microscopy showed that after induction, the spindle-shaped or fibroblast-like Wharton's jelly mesenchymal stem cells changed into bulbous cells with numerous processes. Immunofluorescent cytochemical staining and reverse-transcription PCR showed positive expression of retinal progenitor cell markers, Pax6 and Rx, as well as weakly down-regulated nestin expression. These results demonstrate that Wharton's jelly mesenchymal stem cells are capable of differentiating into retinal progenitor cells in vitro. | Ying Hu Jun Liang Hongping Cui Xinmei Wang Hua Rong Bin Shao Hao Cui | 2013 | Neural Regeneration Research2013，8，19： | 7 |
| 3 | Mechanism of the interaction between Au nano-particles and polymerase in nanoparticle PCR显示文摘Nanoparticle PCR is a novel method to optimize DNA amplification. It performs well in improving specificity, enhancing sensitivity and speed. Several mechanisms were proposed in previous studies: one was based on the interaction between gold nanoparticles (AuNPs) and DNA while the other was attributed to the heat transfer property of AuNPs. In this paper, we propose that the interaction between AuNPs and DNA polymerase can significantly influence PCR. First, the addition of DNA polymerase can eliminate the inhibitory effects of excess AuNPs. Second, the addition of AuNPs will increase yield of the desired PCR product and make the optimum concentration of DNA polymerase move to higher value. Third, while excess polymerase might inhibit amplification efficiency, AuNPs can reverse this process and the yield of PCR amplification. Based on these results we propose a possible mechanism that AuNPs might modulate the activity of polymerase and improve PCR amplification. | MI LiJuan ZHU HongPing ZHANG XiaoDong HU Jun FAN ChunHai | 2007 | Chinese Science Bulletin2007，52，17： | 7 |
| 4 | Heterogeneous Fracture Simulation of Three-point Bending Plain-concrete Beam with Double Notches显示文摘Plain concrete is regarded as a two-phase material comprising randomly distributed aggregates and mortar matrix. A series of three-point bending concrete beams with symmetric or asymmetric double notches are modeled using the modified random aggregate generation and packing algorithm. The cohesive zone model is used as the fracture criterion and the cohesive elements are inserted into both the mortar matrix and the aggregate-mortar interfaces as potential micro-cracking zones. The dead and alive crack phenomena are studied experimentally and numerically; and the influences of notch location, aggregate distribution and gradation on fracture are numerically evaluated. Some important conclusions are given. | Chuanchuan Zhang Xinhua Yang Hu Gao Hongping Zhu | 2016 | Acta Mechanica Solida Sinica2016，29，3： | 6 |
| 5 | An improved piezoelectric harvester available in scavenging-energy from the operating environment with either weaker or stronger vibration levels显示文摘An improved harvester available in scavenging energy from the operating environment with either weaker or stronger vibration levels is studied. To ensure the optimal harvester performance, a Cuk dc-dc converter is employed into the modulating circuit. This paper reports how this harvester scav- enges maximal energy from varying-level vibrations and store energy into an electrochemical battery. Dependence of the duty cycle upon the external vibration level is calculated, and it is found that: 1) for weaker vibrations, the charging current into the battery is smaller than the allowable current, and thus all the optimal output power of the harvesting structure can be absorbed by the battery. In this case, the duty cycle should be fixed at 1.86%; 2) for stronger external forcing, the allowable charging current of the battery is smaller than the optimal harvested current. This indicates that just a portion of the sca- venged energy can be accepted by the battery. Thus, the duty cycle should be decreased gradually with the increase of the vibration level. Finally the energy transmission process and the roles of each elec- tronic element are analyzed. It is shown that a Cuk converter can greatly raise the efficiency of such a harvester, particularly when subjected to a weaker ambient vibration. | XUE Huan HU HongPing HU YuanTai CHEN XueDong | 2009 | Science China(Physics,Mechanics & Astronomy)2009，52，2： | 5 |
| 6 | AN ANALYSIS OF A CYLINDRICAL THIN SHELL AS A PIEZOELECTRIC TRANSFORMER显示文摘有正切的 poling 的圆形的圆柱的压电的陶器的壳的颤动被调查因为变压器申请和一个分析答案被获得。输出电压,输入进入和变压器的效率的数字计算被介绍。结果显示分析的结构能与驾驶频率和匹配的负担阻抗的某个泛音被用作一个压电的变压器。 | Gao Farong Hu Hongping Hu Yuantai Xiong Caihua | 2007 | Acta Mechanica Solida Sinica2007，20，2： | 4 |
| 7 | Systematic Characterization of Long Non-Coding RNAs and Their Responses to Drought Stress in Dongxiang Wild Rice显示文摘Long non-coding RNAs(lncRNAs) play important roles in response to various biotic and abiotic stresses. So far, systematic identification and characterization of lncRNAs have been reported in a few model plant species and major crops, but their roles in abiotic stress response have not yet been reported in common wild rice(Oryza rufipogon). Dongxiang wild rice(DXWR) possesses a high degree of drought resistance and has been well recognized as a precious genetic resource for drought resistant rice breeding. We presented the reference catalog of 1 655 novel lncRNA transcripts in DXWR using strand-specific RNA sequencing and bioinformatics approaches. Meanwhile, a total of 1092 lncRNAs were determined as differentially expressed lncRNAs under drought stress. Quantitative real-time PCR results exhibited a high concordance with RNA sequencing data, which confirmed that the expression patterns of lncRNAs based on RNA sequencing were highly reliable. Furthermore, 8 711 transcripts were predicted as target genes of the differentially expressed lncRNAs. Functional annotation analysis based on Gene Ontology and Kyoto Encyclopedia of Genes and Genomes databases showed that the target genes were significantly enriched in cellular and metabolic processes, cell part, binding and plant hormone signal transduction, as well as many other terms related to abiotic stress resistance. These results expanded our understanding of lncRNA biology and provided candidate regulators for genetic improvement of drought resistance in rice cultivars. | QI Weidong CHEN Hongping YANG Zuozhen HU Biaolin LUO Xiangdong AI Bing LUO Yuan HUANG Yu XIE Jiankun ZHANG Fantao | 2020 | Rice science2020，27，1： | 3 |
| 8 | AN EXACT ANALYSIS OF FORCED THICKNESS-TWIST VIBRATIONS OF MULTI-LAYERED PIEZOELECTRIC PLATES显示文摘这篇论文处理 multi-layered 的厚度扭曲颤动 6 公里对称或极化的陶艺的晶体的矩形的压电的板。一个准确答案从线性压电的三维的方程被获得。答案对合成压电的设备的理解和设计有用。一个压电的共鸣器,一个压电的变压器,和一个压电的发电机作为例子被分析。 | Hu Hongping Chen Ziguang Yang Jiashi Hu Yuantai | 2007 | Acta Mechanica Solida Sinica2007，20，3： | 3 |
| 9 | Identification and Characterization of Drought Stress-Responsive Novel microRNAs in Dongxiang Wild Rice显示文摘MicroRNAs(miRNAs) are non-coding small RNAs, which play important regulatory roles in response to biotic and abiotic stresses. Dongxiang wild rice(Oryza rufipogon, DXWR) can survive in extreme drought environment, but its molecular mechanism of drought resistance is still largely unknown. To further explore miRNA regulatory mechanisms involved in drought resistance, we identified 138 novel miRNAs in DXWR using small RNA sequencing and bioinformatics approaches, and found that the expression levels of 67 novel miRNAs were significantly affected by drought stress. In total, 200 candidate target genes were predicted and annotated for the drought stress-responsive novel miRNAs. Gene Ontology(GO) analysis and Kyoto Encyclopedia of Genes and Genomes(KEGG) pathways suggested that most of the target genes were related to metabolism. Stem-loop quantitative real-time PCR(qRT-PCR) results exhibited high concordance with sequencing data, which confirmed that miRNA expression patterns based on small RNA sequencing in the present study were reliable. Meanwhile, qRT-PCR validated the inverse expression patterns between several miRNAs and their target genes. These results will enhance our understanding of miRNA regulatory mechanisms in response to drought stress in DXWR, and can serve as an important reference for the protection and utilization of this valuable genetic resource. | ZHANG Fantao LUO Yuan ZHANG Meng ZHOU Yi CHEN Hongping HU Biaolin XIE Jiankun | 2018 | Rice science2018，25，4： | 3 |
| 10 | Effect of Honghua (Flos Carthami) on nitric oxide production in RAW 264.7 cells and α-glucosidase activity显示文摘OBJECTIVE: To study the effects of extracts from Honghua(Flos Carthami) on lipopolysaccharide induced nitric oxide(NO) production in RAW 264.7cells and the influence of the extracts on yeastα-glucosidase activity. The total flavonoid content of the extracts was also determined.METHODS: Cytotoxicity of the extracts to RAW264.7 cells was evaluated by the ATPlite? method.Inhibitory effects of the extracts on NO production were evaluated by Griess assay. Curcumin was used as a positive control. Screening of extracts for potential α-glucosidase inhibitors was done by a fluorometric assay.The assay was based on the hydrolysis of 4-methylumbelliferyl-a-D-glucopyranoside to form the fluorescent product, 4-methylumbelliferone. Acarbose was used as a positive control. The total flavonoid content was tested using kaempferol as the standard.RESULTS: There were significant inhibitory effects on NO production when the extracts were 25-100μg/mL(P<0.05) and curcumin was 2-4 μg/mL(P<0.001). The extracts showed an inhibitory effect onα-glucosidase activity at the concentrations of15.6-125 μg/mL with a half maximal(50%) inhibitory concentration(IC50) of(32.8±5.7) μg/mL, compared with the IC 50 of acarbose at(1.8±0.4) μg/mL.There was a significant difference between the two IC50values(P<0.001). The total content of flavonoids per gram of dried herb was1.14 mg.CONCLUSION:Honghua(Flos Carthami)showed in hibitory effects on NO production in activated RAW264.7 macrophage cells and an inhibitory effect on yeast α-glucosidase. There might be a relationship between these pharmacological effects and its flavonoid content. | Hui Liao Linda Banbury Hongping Liang Xiaomin Wang Xiaokai Lü Ling Hu Jin Wu | 2014 | Journal of Traditional Chinese Medicine2014，34，3： | 2 |
| 11 | 原发性肺滑膜肉瘤术后胸膜转移1例报告并文献复习(英文)显示文摘We describe a case of primary pulmonary synovial sarcoma arising in the lung of a 35-year-old woman.The tumor was a single mass and had a well-defined pleural-based with homogeneous density in the edge of the middle lobe,with no calcification and a fat component on plain CT scan.On the contrast-enhanced CT scan,the tumor showed moderately enhancement and circular enhancement with no enlargement of mediastinal,hilar lymph nodes.Skeleton single photon emission CT(ECT) was unremarkable.Gross and histological findings by postoperative pathology showed the tumor had pseudo-capsule and was well-circumscribed with foci of necrosis,hemorrhage and cystic change,under microscope tumor was typically mitotically active,spindle cells growing in intersecting fascicles or in solid sheets with epithelial differentiation.The immunohistochemical examination of CD99,Vim,PCK and EMA were positive.The tumor recurred with multiple pleural nodules and mass at 5 months after surgery,chest CT revealed the tumor was in the ipsilateral costophrenic angle for chest pain of the patient.After dynamic contrast-enhanced,the solid parts and the capsule of the lesion showed progressive enhancement and the liquefied area of the lesion without enhancement.This case indicates that a primary pulmonary synovial sarcoma is extremely rare and malignant,its prognosis is poor.There are some relatively specific imaging findings. | Haiquan Yao Zhibin Hu Hongping Lin Heshui Shi | 2011 | The Chinese-German Journal of Clinical Oncology2011，10，9： | 2 |
| 12 | Loss of E-cadherin promotes the growth, invasion and drug resistance of colorectal cancer cells and is associated with liver metastasis显示文摘 | Xiaobing Chen Yongsheng Wang Hongping Xia Qiwu Wang Xiaochun Jiang Zihong Lin Yuedong Ma Yang Yang Minghua Hu | 2012 | Molecular Biology Reports2012，，： | 2 |
| 13 | ELECTRICALLY FORCED VIBRATION OF A THICKNESS-TWIST MODE PIEZOELECTRIC RESONATOR WITH NON-UNIFORM ELECTRODES显示文摘我们与在 6 公里对称的晶体的一个压电的板共鸣器的厚度扭曲颤动上改变厚度学习电极的效果。准确理论分析被执行。结果证明不一致的电极在模式形状上有强壮的效果,并且建议为套住的强壮的精力使用不一致的电极的可能性。 | Yang Jiashi Chen Ziguang Hu Hongping | 2007 | Acta Mechanica Solida Sinica2007，20，3： | 2 |
| 14 | Differential response of multiple zebrafish hepatic F-box protein genes to 17α-ethinylestradiol treatment显示文摘Estrogens are accumulating in environment and their effects on a variety of reproductive processes and tumorigenesis were reported by previous study, but the mechanism of estrogen promoting neoplasia was still not clear. F-box protein (FBP) is the component of E3 ubiquitin ligase which takes part in a variety of key biological processes. In this study, using mature male zebrafish, which are more sensitive to estrogen treatment, we examined influence of 17α-ethinylestradiol (EE2) exposure on the expression of a series of hepatic FBP genes, which take part in a variety of biological processes, including tumorigenesis. The influence of EE2 on the expression of hepatic mRNA concentrations of FBP genes were quantified based on the expression of the optimal internal control gene in male zebrafish after 7-day exposure to EE2, from a low-dose concentration (1 ng/L) to environmentally relevant concentrations (10, 100 ng/L). Our results showed that EE2 exposure reduced the expression of fbxl14a, fbxl14b, fbxo25 and β-TRCP2b, but enchanced the expression of skp2. While the alterations in fbxl2, fbxw7, fbxo9, β-TRCP2a, fbxl18 and fbxo45 mRNA levels were not observed after EE2 exposure. Thus, our results showed that the expression of hepatic FBP genes exhibited differentially in male zebrafish exposed EE2. The changes of the expression level of FBP genes induced by EE2 may be an important clue to elucidate the correlations of estrogen and hepatic tumors. | Hongping Zheng Shifeng Li Zhili Wu Yunbin Zhang Shengnan Hu Yuanchang Yan Yiping Li | 2011 | Journal of Environmental Sciences2011，23，4： | 2 |
| 15 | BaYOBO_(3):A deep-ultraviolet rare-earth oxy-borate with a large second harmonic generation response显示文摘Deep-ultraviolet(UV)nonlinear optical(NLO)crystals with excellent performances are of great importance in laser science and technology.However,to design and synthesize an ideal deep-UV NLO material with a balance between second harmonic generation(SHG)response and UV cut-off edge is still a huge challenge.Herein,a new oxy-borate BaYOBO_(3)(BaYBO)was designed and synthesized by substituting Be^(2+)with Y^(3+)from Sr_(2)Be_(2)B_(2(O_(7).The BaYBO features a stable three-dimensional framework and satisfies the property balance between a large SHG response(~2.6×KH_(2)PO_(4)KDP))and a short UV cut-off edge(<190 nm)as a promising deep-UV NLO candidate.The study of structure-property relationship indicates that the large SHG response of BaYBO is mainly attributed to the coplanar arrangement and large number density of BO_(3 )triangles.These results demonstrate that substituting Be^(2+)with Y^(3+)cations is also a feasible strategy for developing new deep-UV NLO crystals. | Mengen Gao Hongping Wu Hongwei Yu Zhanggui Hu Jiyang Wang Yicheng Wu | 2021 | Science China Chemistry2021，64，7： | 1 |
| 16 | Nonlinear characteristics of a circular plate piezoelectric harvester with relatively large deflection near resonance 显示文摘 | Xue Huan Hu Hongping | 2008 | IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control2008，55，7： | 1 |
| 17 | A recognition system of China-style license plates based on mathematical morphology and neural network显示文摘 | Yanping Bai Hongping Hu Fei Li Wei Shuang Lixia Gong | 2010 | International Journal of Mathematical Models and Methods in Applied Sciences2010，4，1： | 1 |
| 18 | HIGH-FREQUENCY VIBRATIONS OF CORRUGATED CYLINDRICAL PIEZOELECTRIC SHELLS显示文摘顺利由圆形的圆柱的表面的多重片组成的弄皱的圆柱的压电的壳的圆柱的颤动沿着他们的母点连接了的联合 extensional 和 exural 被学习。与短波长为相对厚的壳或相等地高周波的模式的盒子验证结果,存在分析被考虑扩大砍变丑和旋转惯性。一个分析答案被获得。基于答案,反响的频率和模式形状被计算。 | Hualong Du Limei Xu Hongping Hu Yuantai Hu Xuedong Chen Hui Fan Jiashi Yang | 2008 | Acta Mechanica Solida Sinica2008，21，6： | 1 |
| 19 | A piezoelectric power harvester with adjustable frequency through axial preloads显示文摘 | HU Yuantai XUE Huan HU Hongping | 2007 | Smart Mater Struct2007，16，： | 1 |
| 20 | Folding beam-type piezoelectric phononic crystal with low-frequency and broad band gap显示文摘A folding beam-type piezoelectric phononic crystal model is proposed to isolate vibration. Two piezoelectric bimorphs are joined by two masses as a folding structure to comprise each unit cell of the piezoelectric phononic crystal. Each bimorph is connected independently by a resistive-inductive resonant shunting circuit. The folding structure extends the propagation path of elastic waves, while its structure size remains quite small. Propagation of coupled extension-flexural elastic waves is studied by the classical laminated beam theory and transfer matrix method. The theoretical model is further verified with the finite element method(FEM). The effects of geometrical and circuit parameters on the band gaps are analyzed. With only 4 unit cells, the folding beam-type piezoelectric phononic crystal generates two Bragg band gaps of 369 Hz to1 687 Hz and 2 127 Hz to 4 000 Hz. In addition, between these two Bragg band gaps, a locally resonant band gap is induced by resonant shunting circuits. Appropriate circuit parameters are used to join these two Bragg band gaps by the locally resonant band gap.Thus, a low-frequency and broad band gap of 369 Hz to 4 000 Hz is obtained. | Shan JIANG Longxiang DAI Hao CHEN Hongping HU Wei JIANG Xuedong CHEN | 2017 | Applied Mathematics and Mechanics(English Edition)2017，38，3： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员