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| 1 | Growth-associated protein 43 and neural cell adhesion molecule expression following bone marrow-derived mesenchymal stem cell transplantation in a rat model of ischemic brain injury显示文摘BACKGROUND:Transplantation of bone marrow-derived mesenchymal stem cells(BMSCs) improves motor functional recovery,but the mechanisms remain unclear.OBJECTIVE:To investigate expression of growth-associated protein 43(GAP-43) and neural cell adhesion molecule following BMSC transplantation to the lateral ventricle in rats with acute focal cerebral ischemic brain damage.DESIGN,TIME AND SETTING:A randomized,controlled,animal experiment using immunohistochemistry was performed at the laboratories of Department of Neurology,Renmin Hospital of Wuhan University and Doctoral Scientific Research Work Station of C-BONS PHARMA,Hubei Province,China,from January 2007 to December 2008.MATERIALS:Monoclonal mouse anti-rat 5-bromo-2-deoxyuridine and neural cell adhesion molecule antibodies were purchased from Sigma,USA;monoclonal mouse anti-rat GAP-43 antibody was purchased from Wuhan Boster,China.METHODS:Rat models of right middle cerebral artery occlusion were established using the thread method.At 1 day after middle cerebral artery occlusion,20 μL culture solution,containing 5 × 105 BMSCs,was transplanted to the left lateral ventricle using micro-injection.MAIN OUTCOME MEASURES:Scores of neurological impairment were measured to assess neural function.Expression of GAP-43 and neural cell adhesion molecule at the lesion areas was examined by immunohistochemistry.RESULTS:GAP-43 and neural cell adhesion molecule expression was low in brain tissues of the sham-operated group,but expression increased at the ischemic boundary(P < 0.05).Transplantation of BMSCs further enhanced expression of GAP-43 and neural cell adhesion molecule(P < 0.05) and remarkably improved neurological impairment of ischemic rats(P < 0.05).CONCLUSION:BMSC transplantation promoted neurological recovery in rats by upregulating expression of GAP-43 and neural cell adhesion molecule. | Yu Peng Qimei Zhang Hui You Weihua Zhuang Ying Zhang Chengyan Li | 2010 | Neural Regeneration Research2010，5，13： | 18 |
| 2 | Genome-wide Dissection of Co-selected UV-B Responsive Pathways in the UV-B Adaptation of Qingke显示文摘Qingke (Tibetan hulless barley) has long been cultivated and exposed to long-term and strong UV-B radiation on the Tibetan Plateau, which renders it an ideal species for elucidating novel UV-B responsive mechanisms in plants. Here we report a comprehensive metabolite profiling and metabolite-based genome-wide association study (mGWAS) using 196 diverse qingke and barley accessions. Our results demonstrated both constitutive and induced accumulation, and common genetic regulation, of metabolites from different branches of the phenylpropanoid pathway that are involved in UV-B protection. A total of 90 significant mGWAS loci for these metabolites were identified in barley-qingke differentiation regions, and a number of high-level metabolite trait alleles were found to be significantly enriched in qingke, suggesting co-selection of various phenylpropanoids. Upon dissecting the entire phenylpropanoid pathway, we identified some key determinants controlling natural variation of phenylpropanoid content, including three novel proteins, a flavone C-pentosyltransferase, a tyramine hydroxycinnamoyl acyltransferase, and a MYB transcription factor. Our study, furthermore, demonstrated co-selection of both constitutive and induced phenylpropanoids for UV-B protection in qingke. | Xingquan Zeng Hongjun Yuan Xuekui Dong Meng Peng Xinyu Jing Qijun Xu Tang Tang Yulin Wang Sang Zha Meng Gao Congzhi Li Chujin Shu Zexiu Wei Wangmu Qimei Yuzhen Basang Jiabu Dunzhu Zeqing Li Lijun Bai Jian Shi Zhigang Zheng Sibin Yu Alisdair R.Fernie Jie Luo Tashi Nyima | 2020 | Molecular Plant2020，13，1： | 9 |
| 3 | Capacity analysis and optimal power allocation for coordinated transmission in MIMO-OFDM systems显示文摘Coordinated transmission in multicell coordination networks has attracted much attentions in recent years.In the paper,we investigate one open problem in the above area,which is concerned with how to solve the closed-form optimal power allocation scheme of coordinated transmission in downlink orthogonal frequency-division multiplexing (OFDM) systems with multiple antenna configurations and individual power constraints.A frequency-selective fading multiple-input multiple-output (MIMO) channel is considered.We derive the closed-form solutions of sum-rate capacity and optimal power allocations for coordinated transmission under the diversity case and the multiplexing case by solving the constrained optimization problems.Numerical simulations are performed to verify the derived theoretical conclusions by means of comparing the proposed optimal power allocation (OPA) scheme with the other two typical power allocation schemes.One is the power allocation scheme combining traditional water-filling with equal power (WS-EF PA).The other is equal power allocation (EPA) scheme. | CUI QiMei HUANG XueQing LUO Bing TAO XiaoFeng JIANG Jun | 2012 | Science China(Information Sciences)2012，55，6： | 6 |
| 4 | Compressed sensing based channel estimation used in non-sample-spaced multipath channels of OFDM system显示文摘By virtue of an increase in spectral efficiency by reducing the transmitted pilot tones, the compressed sensing(CS) has been widely applied to pilot-aided sparse channel estimation in orthogonal frequency division multiplexing(OFDM) systems. The researches usually assume that the channel is strictly sparse and formulate the channel estimation as a standard compressed sensing problem. However, such strictly sparse assumption does not hold true in non-sample-spaced multiple channels. The authors in this article proposed a new method of compressed sensing based channel estimation in which an over-complete dictionary with a finer delay grid is applied to construct a sparse representation of the non-sample-spaced multipath channels. With the proposed, the channel estimation was formulated as the model-based CS problem and a modified model-based compressed sampling matching pursuit(Co Sa MP) algorithm was applied to reconstruct the discrete-time channel impulse response(CIR). Simulation indicates that the new method proposed here outperforms the traditional standard CS-based methods in terms of mean square error(MSE) and bit error rate(BER). | Chen Baohao Cui Qimei Yang Fan | 2015 | The Journal of China Universities of Posts and Telecommunications2015，22，2： | 5 |
| 5 | Cross-Layer Framework for Capacity Analysis in Multiuser Ultra-Dense Networks with Cell DTx显示文摘Cell discontinuous transmission(Cell DTx)is a key technology to mitigate inter-cell interference(ICI)in ultra-dense networks(UDNs).The aim of this work is to understand the impact of Cell DTx on physical-layer sum rates of SBSs and link-layer quality-of-service(QoS)performance in multiuser UDNs.In this work,we develop a cross-layer framework for capacity analysis in multiuser UDNs with Cell DTx.In particular,we first extend the traditional one-dimensional effective capacity model to a new multidimensional effective capacity model to derive the sum rate and the effective capacity.Moreover,we propose a new iterative bisection search algorithm that is capable of approximating QoS performance.The convergence of this new algorithm to a unique QoS exponent vector is later proved.Finally,we apply this framework to the round-robin and the max-C/I scheduling policies.Simulation results show that our framework is accurate in approximating 1)queue length distribution,2)delay distribution and 3)sum rates under the above two scheduling policies,and further show that with the Cell DTx,systems have approximately 30% higher sum rate and 35% smaller average delay than those in full-buffer scenarios. | Qing Li Yu Chen Qimei Cui Yu Gu Guoqiang Mao | 2019 | China Communications2019，16，9： | 4 |
| 6 | Energy-aware deployment of dense heterogeneous cellular networks with QoS constraints显示文摘The base station(BS) configuration is a key factor to improve energy efficiency(EE). In this paper,we focus on designing the network deployment parameters(i.e., BS densities) for biased K-tier heterogeneous cellular network(HCN) with quality of service(Qo S) provisioning. Using appropriate approximations, we derive the closed-form expressions of optimal BS density across all tiers to minimize the area power consumption(APC) by applying the stochastic geometry theory, while satisfying the users' Qo S requirements. These results are used to obtain some new insights into the EE performance of biased HCN deployment. With the aid of this approach, the best type of BSs to be deployed or switched off for energy saving purposes can be identified from the perspectives of BS transmission power. More precisely, if the BS transmission power ratio between an arbitrary pair of tiers of K-tier HCN, e.g., the small cell BS and macro BS tiers, is higher than a threshold which is a function of path loss exponent, bias factor and power consumption, the small cell BSs are preferred.The opposite situation takes place otherwise. Furthermore, it is also shown that, compared to the unbiased HCN scenario, significant energy savings are possible by appropriately biasing the HCN and optimizing the BS density, subject to the Qo S constraints among all tiers. | Qimei CUI Zhiyan CUI Wei ZHENG Riku JANTTI Weiliang XIE | 2017 | Science China(Information Sciences)2017，60，4： | 4 |
| 7 | printed electrode immunosensors for Schistosoma japonicum显示文摘 | ZENG Shaohua TIAN Zhi CHE Hongli YANG Huihui CHEN Xiuchun FENG Qimei ZHOU Yunfei ZHANG Shuju WU Zhaoyang WANG Shiping | 2012 | 中南大学学报(医学版)2012，37，6： | 3 |
| 8 | Compressive Sensing Based Wireless Localization in Indoor Scenarios显示文摘The sparse nature of location finding in the spatial domain makes it possible to exploit the Compressive Sensing (CS) theory for wireless location.CS-based location algorithm can largely reduce the number of online measurements while achieving a high level of localization accuracy,which makes the CS-based solution very attractive for indoor positioning.However,CS theory offers exact deterministic recovery of the sparse or compressible signals under two basic restriction conditions of sparsity and incoherence.In order to achieve a good recovery performance of sparse signals,CS-based solution needs to construct an efficient CS model.The model must satisfy the practical application requirements as well as following theoretical restrictions.In this paper,we propose two novel CS-based location solutions based on two different points of view:the CS-based algorithm with raising-dimension pre-processing and the CS-based algorithm with Minor Component Analysis (MCA).Analytical studies and simulations indicate that the proposed novel schemes achieve much higher localization accuracy. | Cui Qimei Deng Jingang Zhang Xuefei | 2012 | China Communications2012，9，4： | 3 |
| 9 | Image Distortion Metric Based on Total Bounded Variation显示文摘Image definition measurement plays an important role in various image processing applications.And a reliable objective image definition metrics is critical for evaluating the definition of the restored image.In this paper,a novel image distortion metric based on minimal Total Bounded Variation(TBV) is presented.It is clarified that when the restored image approximates to the original clear image,the smaller the TBV is,the better the definition of the restored image is.Furthermore,the difference between the restored image and the original clear image is the smallest when the TBV is minimum.In numerical results,the TBV of the original clear image,blur image and restored image are presented and compared,and the results demonstrate the validity of the distortion metric proposed. | Cheng Xiaogang An Mingwei Chen Qimei | 2012 | China Communications2012，9，2： | 3 |
| 10 | A Nonparametric Approach to Foreground Detection in Dynamic Backgrounds显示文摘Foreground detection is a fundamental step in visual surveillance.However,accurate foreground detection is still a challenging task especially in dynamic backgrounds.In this paper,we present a nonparametric approach to foreground detection in dynamic backgrounds.It uses a history of recently pixel values to estimate background model.Besides,the adaptive threshold and spatial coherence are introduced to enhance robustness against false detections.Experimental results indicate that our approach achieves better performance in dynamic backgrounds compared with several approaches. | LIAO Juan JIANG Dengbiao LI Bo RUAN Yaduan CHEN Qimei | 2015 | China Communications2015，12，2： | 3 |
| 11 | Vehicle Representation and Classification of Surveillance Video Based on Sparse Learning显示文摘 | CHEN Xiangjun RUAN Yaduan ZHANG Peng CHEN Qimei ZHANG Xinggan | 2014 | China Communications2014，11，A01： | 2 |
| 12 | A combination of digital design and three-dimensional printing to assist treatment of thoracolumbar compression fractures using percutaneous kyphoplasty显示文摘Objective:To evaluate the clinical efficacy of the preoperative digita1 design combined with three dimensional(3D)printing models to assist percutaneous kyphoplasty(PKP)treatment for thoracolumbar compression frac tures.Methods:From January 2018 to August 2020,we obtained data of 99 patients diagnosed thoracolumbar compression fractures.These patients were divided into control group(n=50)underwent traditional PKP surgery,and observation group(n=49)underwent preoperative digital design combined with 3D printing model assisted PKP treatment.The clinical efficacy was evaluated with five parameters,including operation time,number of intraoperative radiographs,visual analogue scale(VAS)score,Cobb Angle change,and high compression rate of injured vertebrae.Results:There were statistically significant differences of operation time and number of intraoperative radio graphs between the two groups(P<0.05).For VAS score,Cobb Angle change and vertebral height compression rate,all of these three parameters were significantly improved when the patients accepted surgery teatment in two groups(P<0.05).However,there were no significant differences between control group and observation group for these three parameters either before or after surgery(P>0.05).Conclusions:Through the design of preoperative surgical guide plate and the application of 3D printing model to guide the operation,the precise design of preoperative surgical puncture site and puncture Angle of the injured vertebra was realized,the number of intraoperative radiographs was reduced,the operation time was shortened and the operation efficiency was improved. | Hui Lu Daixiang Jiang Qimei Wu Rong Liu | 2021 | Global Health Journal2021，5，4： | 2 |
| 13 | Two-Timescale Online Learning of Joint User Association and Resource Scheduling in Dynamic Mobile Edge Computing显示文摘For the mobile edge computing network consisting of multiple base stations and resourceconstrained user devices,network cost in terms of energy and delay will incur during task offloading from the user to the edge server.With the limitations imposed on transmission capacity,computing resource,and connection capacity,the per-slot online learning algorithm is first proposed to minimize the time-averaged network cost.In particular,by leveraging the theories of stochastic gradient descent and minimum cost maximum flow,the user association is jointly optimized with resource scheduling in each time slot.The theoretical analysis proves that the proposed approach can achieve asymptotic optimality without any prior knowledge of the network environment.Moreover,to alleviate the high network overhead incurred during user handover and task migration,a two-timescale optimization approach is proposed to avoid frequent changes in user association.With user association executed on a large timescale and the resource scheduling decided on the single time slot,the asymptotic optimality is preserved.Simulation results verify the effectiveness of the proposed online learning algorithms. | Jian Zhang Qimei Cui Xuefei Zhang Xueqing Huang Xiaofeng Tao | 2021 | China Communications2021，18，8： | 2 |
| 14 | A Precise Information Extraction Algorithm for Lane Lines显示文摘Lane line detection is a fundamental step in applications like autonomous driving and intelligent traffic monitoring. Emerging applications today have higher requirements for accurate lane detection. In this paper, we present a precise information extraction algorithm for lane lines. Specifically, with Gaussian Mixture Model(GMM), we solved the issue of lane line occlusion in multi-lane scenes. Then, Progressive Probabilistic Hough Transform(PPHT) was used for line segments detection. After K-Means clustering for line segments classification, we solved the problem of extracting precise information that includes left and right edges as well as endpoints of each lane line based on geometric characteristics. Finally, we fitted these solid and dashed lane lines respectively. Experimental results indicate that the proposed method performs better than the other methods in both single-lane and multi-lane scenarios. | Jinyan Chen Yaduan Ruan Qimei Chen | 2018 | China Communications2018，15，10： | 2 |
| 15 | The immediate impact of new prod-uct introductions on stock price: The role of firm resourcesand size 显示文摘 | Lee Ruby P Chen Qimei | 2009 | Joumal of Product Innovation Management2009，26，1： | 1 |
| 16 | FOXO3A genotype is strongly associated with human longevity显示文摘 | Willcox BJ Donlon TA Qimei H | 2008 | PNAS2008，105，13： | 1 |
| 17 | FOXO3A genotype is strongly associated with human longevity 显示文摘 | Willcox B J Donlon TA Qimei H | 2008 | PNAS2008，105，13： | 1 |
| 18 | Optimal power allocation for homogeneous and heterogeneous CA-MIMO systems显示文摘Carrier aggregation (CA) technique has been adopted by 3GPP LTE-Advanced due to its ability of enhancing the spectrum efficiency and peak data rates through aggregating multiple component carriers (CCs). Two main factors make power control optimization very essential for CA-MIMO radio link: the different channel characteristics in multiple CCs, and multiple power constraint conditions (per-CC, per-antenna and pertransmitter power constraints) in the actual CA system deployment. This paper firstly derives the degenerate conditions of optimal power allocation for a single-transmitter CA-MIMO system. Stemming from the derived degenerate conditions, we propose a modified hybrid gradient optimal power allocation(MHGOPA) algorithm to maximize the system performance. Simulation results verify the validity of the proposed resource allocation approach by comparing with baseline average power allocation algorithm. Finally, we extend the MHGOPA algorithm into a heterogeneous CA network with multiple transmitters working simultaneously. | CUI QiMei KANG PeiChuan HUANG XueQing VALKAMA Mikko NIEMELA Jarno | 2013 | Science China(Information Sciences)2013，56，2： | 1 |
| 19 | Rough Prime Ideals and Rough Fuzzy Prime Ideals in Semigroups 显示文摘 | XIAO Qimei ZHANG Zhenliang | 2006 | Information Sciences2006，176，6： | 1 |
| 20 | The fungicidal terpenoids and essential oil from Litsea cubeba in Tibet显示文摘 | YANG Yu JIANG Jiazheng QIMEI Luobu | 2010 | Molecules2010，15，10： | 1 |
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