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| 1 | Characterization of focal hepatic lesions with contrast-enhanced C-cube gray scale ultrasonography显示文摘AIM: To characterize enhancement patterns of focal hepatic lesions using C-cube gray scale sonography with a microbubble contrast agent and to evaluate its usefulness in differential diagnosis of hepatic lesions.METHODS: Fifty-four patients with 58 focal hepatic lesions were examined with Levovist-enhanced C-cube gray scale sonography. The final diagnosis of hepatic lesions was 29primary liver cancers, 4 metastases, 8 hemangiomas, 12focal nodular hyperplasias, 2 inflammatory pseudotumors of the liver and 3 angiomyolipomas. The initiation time of enhancement in various lesions and enhancement duration after administration of contrast agent were compared.Vascular findings in lesions were classified as peripheral enhancement, homogenous enhancement, mosaic enhancement and no enhancement depending on microbubble signals in the lesion relative to the liver parenchyma.RESULTS: The initiation time of enhancement in hemangioma (48±12 s) was significantly later compared to other lesions (P<0.05). The enhancement duration of malignancies (69±33 s in primary liver cancer, 61±23 s in metastasis) was significantly shorter compared to benign lesions (P<0.05).Intranodular enhancement appearing at arterial phase and decreasing at portal venous phase was considered characteristic for malignancy. Intranodular enhancement did not appear earlier than the liver parenchyma, and peripheral enhancement pattern was regarded as positive findings for hemangioma. Intranodular enhancement appeared in the arterial phase, and homogenous enhancement pattern sustained in the whole portal venous phase were regarded as positive findings for focal nodular hyperplasia. No microbubble signals appeared in two inflammatory pseudotumors of the liver.CONCLUSION: C-cube gray scale sonography can demonstrate dynamic intranodular enhancement in various focal hepatic lesions. The information provided by this methodology may be useful in the differential diagnosis of hepatic lesions. | Wen-PingWang HongDing QingQi FengMao Zhi-ZhangXu MasatoshiKudo | 2003 | World Journal of Gastroenterology2003，9，8： | 8 |
| 2 | Establishing Multi-Party Trust Architecture for DRM by Using Game-Theoretic Analysis of Security Policies显示文摘 | ZHANG Zhiyong PEI Qingqi MA Jianfeng YANG Lin | 2009 | Chinese Journal of Electronics2009，18，3： | 8 |
| 3 | Defense Against Objective Function Attacks in Cognitive Radio Networks显示文摘 | PEI Qingqi LI Hongning MA Jianfeng FAN Kefeng | 2011 | Chinese Journal of Electronics2011，20，1： | 7 |
| 4 | The desumoylating enzyme sentrin-specific protease 3 contributes to myocardial ischemia reperfusion injury显示文摘Sentrin-specific protease 3(SENP3), a member of the desumoylating enzyme family, is known as a redox sensor and could regulate multiple cellular signaling pathways. However, its implication in myocardial ischemia reperfusion(MIR) injury is unclear. Here, we observed that SENP3 was expressed and upregulated in the mouse heart depending on reactive oxygen species(ROS) production in response to MIR injury. By utilizing si RNA-mediated cardiac specific gene silencing, SENP3 knockdown was demonstrated to significantly reduce MIR-induced infarct size and improve cardiac function. Mechanistic studies indicated that SENP3 silencing ameliorated myocardial apoptosis mainly via suppression of endoplasmic reticulum(ER) stress and mitochondrial-mediated apoptosis pathways. By contrast, adenovirusmediated cardiac SENP3 overexpression significantly exaggerated MIR injury. Further molecular analysis revealed that SENP3 promoted mitochondrial translocation of dynamin-related protein 1(Drp1) in reperfused myocardium. In addition, mitochondrial division inhibitor-1(Mdivi-1), a pharmacological inhibitor of Drp1, significantly attenuated the exaggerated mitochondrial abnormality and cardiac injury by SENP3 overexpression after MIR injury. Taken together, we provide the first direct evidence that SENP3 upregulation pivotally contributes to MIR injury in a Drp1-dependent manner, and suggest that SENP3 suppression may hold therapeutic promise for constraining MIR injury. | Lingchen Gao Yichao Zhao Jie He Yang Yan Longwei Xu Nan Lin Qingqi Ji Renyang Tong Yanan Fu Yu Gao Yuanyuan Su Ancai Yuan Ben He Jun Pu | 2018 | Journal of Genetics and Genomics2018，45，3： | 5 |
| 5 | Neighbor Detection-Based Spectrum Sensing Algorithm in Distributed Cognitive Radio Networks显示文摘Security issues of spectrum sensing have drawn a lot of attentions in Cognitive radio networks(CRNs).Malicious users can mislead the network to make wrong decision about the states of channels by tampering spectrum sensing data.To defense against Spectrum sensing data falsification(SSDF) attack,we propose a neighbor detection-based spectrum sensing algorithm in distributed CRNs,which can detect attackers with the help of neighbors during spectrum sensing to improve the accuracy of decision making.The proposed scheme can also guarantee the connectivity of the network.Simulation results illustrate that the proposed scheme can defense against SSDF attacks effectively and reach the unified information of spectrum sensing data. | PEI Qingqi LI Hongning LIU Xianjun | 2017 | Chinese Journal of Electronics2017，26，2： | 4 |
| 6 | Dynamic Polling MAC Scheme Considering Emergency Access in WSNs Based on Priorities显示文摘In Wireless Sensor Networks(WSNs),polling can obviously improve the throughput and decrease average access delay by allocating bandwidth efficiently and reasonably.In this paper,a Dynamic Polling Media Access Control (DPMAC) scheme designed according to WSNs' features is proposed.DPMAC is a priority based access control protocol with the characteristics that its polling table is dynamically refreshed depending on whether the sensor node is active and that the bandwidth is dynamically allocated according to the traffic types.The access priorities are determined by the emergency levels of events and the scheduler proposed in our MAC is preemptive based on the deadline of the events.Simulation results show that DPMAC can efficiently utilize bandwidth and decrease average access delay and response time for emergency events with different access priorities in WSNs. | Pei Qingqi Chen Chen Xie Weiguang | 2012 | China Communications2012，9，4： | 3 |
| 7 | A Novel Visual Multi-Secret Sharing Scheme Based on Folding-up Operation显示文摘 | WANG Xiang PEI Qingqi YAN Peimin LI Hui WANG Yong | 2013 | Chinese Journal of Electronics2013，22，4： | 2 |
| 8 | Development of Amphioctopus fangsiao(Mollusca:Cephalopoda)from eggs to hatchlings:indications for the embryonic developmental management显示文摘Amphioctopus fangsiao is an important fishery resource in northern coastal China,and there is an interest to develop its commercial cultivation under controlled conditions.In this study,we describe the embryonic development of A.fangsiao from eggs to hatchlings,focusing on the formation of the mantle,eyes and arms.Results indicate that this species has several favorable characteristics for aquaculture,such as a short incubation period and a large body size of hatchlings.During the organogenesis,the primordia of organs,including the optic sac and arm crown,first appeared at stage VIII;then the mantle primordium,eye primordia and arm crown become visible at stage IX-X,and the rudiment of embryo(mantle,eyes and arms)was completely outlined at stage XI.The retinal pigment appeared yellowish at stage X-XI and gradually deepens in pigmentation in the subsequent stages,turning from yellowish to yellow,red,dark-red and eventually black.At stage XV,the primary lid fold,with only a circular opening remaining,covered the eye,and the dorsal ocular edge did not reach the ventral side until hatching(day 1-7).Afterwards,about 24 days after hatching,both the dorsal and ventral sides of eyelid could contract freely,with an oval and elongate slit remaining that was a miniature version of the adult morphology.The chromatophores and ink sac appeared at stage XIV.These observations provide a foundation for the reproductive biology and aquaculture of A.fangsiao and also offer an important reference for the research of embryonic development in related species. | Dian hang Jiang Xiaodong Zheng Yaosen Qian Qingqi Zhang | 2020 | Marine Life Science & Technology2020，2，1： | 2 |
| 9 | Dynamic Cluster Key Management Scheme on Wireless Sensor Networks显示文摘Wireless sensor networks are open architectures, so any potential threat can easily intercept, wiretap and counterfeit the information. Therefore, the safety of WSN is very important. Since any single key system cannot guarantee the security of the wireless sensor network for communications, this paper introduces a hierarchical key management scheme based on the different abilities of different sensor nodes in the clustered wireless sensor network. In this scheme, the nodes are distributed into several clusters, and a cluster head must be elected for each cluster. Private communication between cluster heads is realized through the encryption system based on the identity of each head while private communication between cluster nodes in a same cluster head is achieved through the random key preliminary distribution system. Considering the characteristics of WSN, we adopt dynamic means called dynamic cluster key management scheme to deal with master key, so master key will be updated according to the changed dynamic network topology. For cluster head node plays a pivotal role in this scheme, a trust manage-ment system should be introduced into the election of the cluster head which will exclude the malicious node from outside the cluster, thus improve the whole network security. | Pei Qingqi Li Hongning Pang Liaojun Hao Yin Hong Tang | 2010 | China Communications2010，7，1： | 2 |
| 10 | Trophic Interaction in a Portunus rituberculatus Polyculture Ecosystem Based on Carbon and Nitrogen Stable Isotope Analysis显示文摘Trophic interaction among various biomass groups in a swimming crab Portunus trituberculatus polyculture pond was investigated using carbon and nitrogen stable isotope analysis. The polycultured animal species also included white shrimp Litopenaeus vannamei, short-necked clam Ruditapes philippinarum, and redlip mullet Liza haematochila. The mean δ^(13)C value for all the biomass groups in polyculture ecosystem ranged from -25.61‰ to -16.60‰, and the mean δ^(15)N value ranged from 6.80‰ to 13.09‰. Significant difference in the δ^(13)C value was found between particulate organic matter(POM) and sediment organic matter(SOM)(P < 0.05), indicating that these two organic matter pools have different material sources. Assuming that a ^(13)C-enrichment factor of 1.00‰ and a ^(15)N-enrichment factor of 2.70‰ existed between consumer and prey, diets of the four cultured animals were estimated using a stable isotope mixing model. The estimated model results indicated that P. trituberculatus mainly feed on Aloidis laevis; L. vannamei mainly feed on shrimp feed; while A. laevis, R. philippinarum and L. haematochelia mainly feed on POM. Shrimp feed was also an important food source of R. philippinarum and L. haematochelia. The diets of P. trituberculatus, L. vannamei, R. philippinarum, and L. haematochila showed complementary effects in this polyculture ecosystem. Our finding indicated that the polyculture of these four organisms with suitable farming density could make an effective use of most of the food sources, which can make a highly efficient polyculture ecosystem. | FENG Jie TIAN Xiangli DONG Shuanglin LI Da HE Ruipeng ZHANG Kai ZHANG Dongxu ZHANG Qingqi | 2018 | Journal of Ocean University of China2018，17，6： | 2 |
| 11 | Dynamic Matching-Based Spectrum Detection in Cognitive Radio Networks显示文摘Cognitive Radio Network provides an opportunity to reduce the spectrum resource crisis by allowing secondary users to access the idle spectrum allocated to primary users. The precondition of spectrum sharing is to obtain the Spectrum Availability Information(SAI). Energy detection is a typical technology to get SAI. With the mobility of primary users, the energy received by secondary users varies greatly with the distance from the target primary users. Most of the existing energy detection algorithms that use fixed thresholds are not suitable. We propose a Dynamic Matching-Based Spectrum Detection(DMBSD) scheme which can detect sensing data, reduce the impact of malicious data and make final sensing results more accurate with dynamic threshold setting and data matching. Simulation results show that the proposed scheme can detect tempered data, and increase detection probability by decreasing false alarm probability and missed detection probability. | Yu Gu Qingqi Pei Hongning Li | 2019 | China Communications2019，16，4： | 2 |
| 12 | Integration of Communication and Computing in Blockchain-Enabled Multi-Access Edge Computing Systems显示文摘Blockchain and multi-access edge com-puting(MEC)are two emerging promising tech-nologies that have received extensive attention from academia and industry.As a brand-new information storage,dissemination and management mechanism,blockchain technology achieves the reliable transmis-sion of data and value.While as a new computing paradigm,multi-access edge computing enables the high-frequency interaction and real-time transmission of data.The integration of communication and com-puting in blockchain-enabled multi-access edge com-puting networks has been studied without a systemat-ical view.In the survey,we focus on the integration of communication and computing,explores the mu-tual empowerment and mutual promotion effects be-tween the blockchain and MEC,and introduces the resource integration architecture of blockchain and multi-access edge computing.Then,the paper sum-marizes the applications of the resource integration ar-chitecture,resource management,data sharing,incen-tive mechanism,and consensus mechanism,and ana-lyzes corresponding applications in real-world scenar-ios.Finally,future challenges and potentially promis-ing research directions are discussed and present in de-tail. | Zhonghua Zhang Jie Feng Qingqi Pei Le Wang Lichuan Ma | 2021 | China Communications2021，18，12： | 2 |
| 13 | The magnetocaloric effect and magnetic phase transitions in Dy ( Co1-xAlx ) 2 compounds 显示文摘 | Liu Haidong Wang Dunhui Tang Shaolong Can Qingqi Tang Tao Gu Benxi Du Youwei | 2002 | Journal of Alloys and Compounds2002，346，： | 1 |
| 14 | Giant Magnetoresistance of the Lal-z Agx MnO3 Polyerystalline Inhomogeneous Granular System 显示文摘 | TANG Tao CAO Qingqi GU Kunming | 2000 | Appl Phys Lett2000，77，： | 1 |
| 15 | Key infection,secrecy transfer and key evolution for sensor networks显示文摘 | Liu Zhihong Ma Jianfeng Pei Qingqi | 2010 | IEEE Transactions on Wireless Communications2010，9，8： | 1 |
| 16 | Elliptic Curve Scalar Multiplication with x-Coordinate显示文摘This paper gives a comprehensive method to do Elliptic Curve Scalar Multiplication with only x-coordinate. Explicit point operation formulae for all types of defining equations of the curves are derived. For each type of curve, the performance is analyzed. The formulae are applied in Montgomery Ladder to get scalar mul- tiplication algorithm operated with only x-coordinate. The new sca- lar multiplication has the same security level and computation amount with protected binary scalar multiplication (PBSM) against side channel attack, and has the advantages of higher security and little memory needed. | ZHANG Ning PEI Qingqi XIAO Guozhen | 2007 | Wuhan University Journal of Natural Sciences2007，12，1： | 1 |
| 17 | Ultraviolet(340~ 390 nm),room temperature,photoluminescence from InAs nanocrystals embedded in SiO2 matrix显示文摘 | Shi Jianzhong Zhu Kaigui Zheng Qingqi | 1997 | Appl Phys Lett1997，70，19： | 1 |
| 18 | Analysis on the Resilience of Key Pre-distribution in Sensor Networks显示文摘Resilience against node capture is one of the main indicators of the key pre-distribution security in sensor networks.On providing the attack model and the definition of the resilience against node capture of sensor networks,the resilience of basic random key pre-distribution,Q-composite random key pre-distribution and their reinforced schemes are analyzed and compared in depth.Research results show that the size of key pool,the numbers of the keys stored in nodes and the value of Q determine the resilience of random key pre-distribution.The tradeoff between the resilience,security connectivity and costs in sensor networks is presented.These researches lay a foundation on the design of the secure protocol and the algorithm in the specific application environment of sensor networks. | Shen Yulong Ma Jianfeng Pei Qingqi | 2007 | China Communications2007，4，3： | 1 |
| 19 | A V2V Emergent Message Dissemination Scheme for 6G-Oriented Vehicular Networks显示文摘To ensure traffic safety and improve traffic efficiency,vehicular networks come up with multiple types of messages for safety and efficiency applications.In sixth-generation(6G)systems,these messages should be timely and error-free disseminated through vehicle-to-vehicle(V2V)communication to ensure traffic safety and efficiency.V2V supports direct communication between two vehicle user equipments,regardless of whether a base station is involved.We propose a packet delivery ratio(PDR)-based message dissemination scheme(PDR-MD)between V2V in 6G-oriented vehicular networks to select relay vehicles when broadcasting emergent messages.This scheme grasps the balance between vehicle distance and PDR so as to reduce transmission delay while ensuring reliable PDR.We compared the PDR-MD scheme with other probabilistic broadcasting schemes.The experimental results show that the PDRMD protocol can maintain close to 95%and above PDR in transmitting emergent messages,and the transfer rate stays below 40%. | CHEN Chen WANG Chenyu CONG Li XIAO Ming PEI Qingqi | 2023 | Chinese Journal of Electronics2023，32，6： | 1 |
| 20 | Development of a multi-agent-based distributed simulation platform for semiconductor manufac turing显示文摘 | LIN Jie LONG Qingqi | 2011 | Expert Systems with Applications2011，38，89： | 1 |
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