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| 1 | Effects of COD/N ratio and DO concentration on simultaneous nitrification and denitrification in an airlift internal circulation membrane bioreactor显示文摘The effects of chemical oxygen demand and nitrogen(COD/N)ratio and dissolved oxygen concentration(DO)on simultaneous nitrification and denitrification(SND)were investigated using an airlift internal circulation membrane bioreactor(AIC-MBR)with synthetic wastewater.The results showed that the COD efficiencies were consistently greater than 90% regardless of changes in the COD/N ratio.At the COD/N ratio of 4.77 and 10.04,the system nitrogen removal efficiency became higher than 70%.However,the nitrogen rem... | Meng Qingjuan Yang Fenglin Liu Lifen Meng Fangang | 2008 | Journal of Environmental Sciences2008，20，8： | 18 |
| 2 | A Reducing Iteration Orthogonal Matching Pursuit Algorithm for Compressive Sensing显示文摘In recent years, Compressed Sensing(CS) has been a hot research topic. It has a wide range of applications, such as image processing and speech signal processing owing to its characteristic of removing redundant information by reducing the sampling rate. The disadvantage of CS is that the number of iterations in a greedy algorithm such as Orthogonal Matching Pursuit(OMP) is fixed, thus limiting reconstruction precision.Therefore, in this study, we present a novel Reducing Iteration Orthogonal Matching Pursuit(RIOMP) algorithm that calculates the correlation of the residual value and measurement matrix to reduce the number of iterations.The conditions for successful signal reconstruction are derived on the basis of detailed mathematical analyses.When compared with the OMP algorithm, the RIOMP algorithm has a smaller reconstruction error. Moreover, the proposed algorithm can accurately reconstruct signals in a shorter running time. | Rui Wang Jinglei Zhang Suli Ren Qingjuan Li | 2016 | Tsinghua Science and Technology2016，21，1： | 17 |
| 3 | Antioxidation Activities of Low-Molecular-Weight Gelatin Hydrolysate Isolated from the Sea Cucumber Stichopus japonicus显示文摘Gelatin extracted from the body wall of the sea cucumber (Stichopus japonicus) was hydrolyzed with flavourzyme.Low-molecular-weight gelatin hydrolysate (LMW-GH) of 700-1700 Da was produced using an ultrafiltration membrane bioreactor system.Chemiluminescence analysis revealed that LMW-GH scavenges high free radicals in a concentration-dependent manner;IC50 value for superoxide and hydroxyl radicals was 442 and 285 μg mL-1,respectively.LMW-GH exhibited excellent inhibitory characteristics against melanin synthesis and tyrosinase activity in B16 cells.Furthermore,LMW-GH notably increased intracellular glutathione (GSH),which in turn suppressed melanogenesis.LMW-GH performs antioxidation activity,holding the potential of being used as a valuable ingredient in function foods,cosmetics and pharmaceuticals or nutriceuticals. | WANG Jingfeng WANG Yuming TANG Qingjuan WANG Yi CHANG Yaoguang ZHAO Qin XUE Changhu | 2010 | Journal of Ocean University of China2010，9，1： | 13 |
| 4 | Study on S-shaped characteristic of Francis reversible unit by on-site test and CFD simulation显示文摘The operation parameters (vibration, shaft displacement and pressure fluctuation) of No. 1 Francis reversible unit of Baoquan pumped-storage power station were measured on site in the no-load mode at net heads of 518.04, 522.01 and 530.38 m, respectively. The rotational speed fluctuations in the no-load mode at three net heads were beyond synchronization requirement with obvious S-shaped characteristic, and misaligned guide vanes (MGV) had to be put into use for synchronization. Further analysis demonstrated that the rotating frequency signal was generally dominant in vibration and shaft displacement mixing signal in the no-load mode, while the frequency domain was wide without an obvious main frequency in pressure fluctuation mixing signal. Besides, the SST k-ω turbulence model was adopted to simulate the four quadrant characteristic curves of Baoquan model pump-turbine at three gate openings, and the relative error between simulation results and model test data was within ±6%, indicating that the simulation method in this paper is feasible and S-shaped characteristic of the pump-turbine can be simulated with CFD method. | LI JinWei HU QingJuan YU JiXing LI QiZhang | 2013 | Science China(Technological Sciences)2013，56，9： | 5 |
| 5 | Tribological behavior of black phosphorus nanosheets as water-based lubrication additives显示文摘Black phosphorus(BP)with a layered structure has been used gradually as a lubrication additive in the tribological area.In this study,BP powders are produced via an easy method of high-energy ball milling using red phosphorus as a raw material.Subsequently,BP nanosheets are prepared via liquid exfoliation in N-methyl pyrolidone solvent.The tribological behavior of BP nanosheets as water-based lubrication additives(BP-WL)is evaluated under Ti6Al4V(TC4)/GCr15 contact.The results suggest that the 70 mg/L BP-WL sample exhibits excellent lubrication performance,whose coefficient of friction(COF)and ball wear rate reduced by 32.4%and 61.1%,respectively,compared with those of pure water.However,as the load increased,the tribological properties of BP-WL reduced gradually because of the agglomeration of BP nanosheets.Based on tribological experiments and worn surface analysis,boundary lubrication mechanisms are proposed.The friction reduced,which is primarily attributed to the low interlaminar shear and adsorption of BP nanosheets.In addition,a tribochemical reaction film comprising TiO_(2),Al_(2)O_(3),and Fe_(2)O_(3)effectively protects the surface of titanium alloy/steel from wear.This new water-based lubrication additive can be used to process titanium alloys. | Qingjuan WANG Tingli HOU Wei WANG Guoliang ZHANG Yuan GAO Kuaishe WANG | 2022 | Friction2022，10，3： | 3 |
| 6 | A solvothermal pre-oxidation strategy converting pitch from soft carbon to hard carbon for enhanced sodium storage显示文摘Due to its low cost and easy availability, the pitch is considered a promising precursor for soft carbon anodes. However, pitch-derived soft carbon shows a high graphitization degree and small interlayer spacing, resulting in its much lower sodium storage performance than hard carbon. We propose a novel preoxidation strategy to introduce additional oxygen atoms into the low-cost soft carbon precursor pitch to fabricate a defect-rich and large-interlayer spacing hard carbon anode(HPP-1100). Compared with the direct pyrolysis of pitch carbon, the sodium storage capacity of HPP-1100 is significantly improved from 120.3 m Ah/g to 306.7 m Ah/g, with an excellent rate and cycling capability(116.5 m Ah/g at 10 C). Moreover, when assorted with an O_(3)-Na(NiFeMn)1/3O_(2)cathode, the full cell delivers a high reversible capacity of 274.0 m Ah/g at 0.1 C with superb cycle life. This work provides a new solution for realizing the application of low-cost pitch anodes in Na-ion batteries. | Jing Wang Lei Yan Binhua Liu Qingjuan Ren Linlin Fan Zhiqiang Shi Qingyin Zhang | 2023 | Chinese Chemical Letters2023，34，4： | 3 |
| 7 | Identification of Five Sea Cucumber Species Through PCR-RFLP Analysis显示文摘Sea cucumbers are traditional marine food and Chinese medicine in Asia. The rapid expansion of sea cucumber market has resulted in various problems, such as commercial fraud and mislabeling. Conventionally, sea cucumber species could be distinguished by their morphological and anatomical characteristics; however, their identification becomes difficult when they are processed. The aim of this study was to develop a new convenient method of identifying and distinguishing sea cucumber species. Polymerase chain reaction-restriction fragment length polymorphism(PCR-RFLP) analysis of mitochondrial cytochrome oxidase I gene(COI) was used to identifing five sea cucumber species(Apostichopus japonicus, Cucumaria frondosa, Thelenota ananas, Parastichopus californicus and Actinopyga lecanora). A 692 bp fragment of COI was searched for BamHI, KpnI, PstI, XbaI and Eco31 I restriction sites with DNAMAN 6.0, which were then used to PCR-RFLP analysis. These five sea cucumber species can be discriminated from mixed sea cucumbers. The developed PCR-RFLP assay will facilitate the identification of sea cucumbers, making their source tracing and quality controlling feasible. | LV Yingchun ZHENG Rong ZUO Tao WANG Yuming LI Zhaojie XUE Yong XUE Changhu TANG Qingjuan | 2014 | Journal of Ocean University of China2014，13，5： | 2 |
| 8 | Analgesic effect of intrathecal bumetanide is accompanied by changes in spinal sodium-potassium-chloride co-transporter 1 and potassium-chloride co-transporter 2 expression in a rat model of incisional pain显示文摘Accumulating evidence has demonstrated that the sodium-potassium-chloride co-transporter 1 and potassium-chloride co-transporter 2 have a role in the modulation of pain transmission at the spinal level through chloride regulation in the pain pathway and by effecting neuronal excitability and pain sensitization.The present study aimed to investigate the analgesic effect of the specific sodium-potassium-chloride co-transporter 1 inhibitor bumetanide,and the change in spinal sodium-potassium-chloride co-transporter 1 and potassium-chloride co-transporter 2 expression in a rat model of incisional pain.Results showed that intrathecal bumetanide could decrease cumulative pain scores,and could increase thermal and mechanical pain thresholds in a rat model of incisional pain.Sodium-potassium-chloride co-transporter 1 expression increased in neurons from dorsal root ganglion and the deep laminae of the ipsilateral dorsal horn following incision.By contrast,potassium-chloride co-transporter 2 expression decreased in neurons of the deep laminae from the ipsilateral dorsal horn.These findings suggest that spinal sodium-potassium-chloride co-transporter 1 expression was up-regulated and spinal potassium-chloride co-transporter 2 expression was down-regulated following incision.Intrathecal bumetanide has analgesic effects on incisional pain through inhibition of sodium-potassium-chloride co-transporter 1. | Yanbing He Shiyuan Xu Junjie Huang Qingjuan Gong | 2014 | Neural Regeneration Research2014，9，10： | 2 |
| 9 | Construction of Generalized Quantum Boolean Functions显示文摘The existing construction methods of Quantum Boolean functions(QBFs) are extended and simplified. All QBFs with one qubit and all local QBFs with any qubits are constructed. And we propose the concept of Generalized quantum Boolean functions(GQBFs). We find all GQBFs with one qutrit and all kinds of local GQBFs with any qutrits. The number of each of the four kinds of functions above is uncountably infinitely many. By using diagonal matrices, we obtain uncountably infinitely many non-local QBFs with any qubits and GQBFs with any qutrits. Infinitely many families of GQBFs with any qudits are obtained from the properties of projection matrices of known saturated orthogonal arrays. | PANG Shanqi ZHANG Qingjuan LIN Xiao | 2019 | Chinese Journal of Electronics2019，28，3： | 2 |
| 10 | Electromagnetic spectrum chipless radio frequency identification:A review显示文摘Over the past few years,Radio Frequency IDentification(RFID)has stridden significantly due to its adoption in many business and daily life activities.RFID empowers end-to-end and item-by-item visibility,letting the customers or decision-makers effectively trail the personnel and resources for improved management.Significant research and development in this area have transformed the inexpensive,miniaturized technology of RFIDs without chip inside.Chipless Radio Frequency IDentification(CRFID)is a unique wireless technology based on radar principle to sense,identify,and track the objects.CRFIDs are simplified and miniaturized tags of traditional RFID,which can widely be used in small and cheap objects/applications in our daily life.This paper reviews the definition,principle,and most recent development in CRFIDs.Based on the reported researches,the ElectroMagnetic Spectrum(EMS)method is typical,which has been concerned by many RFID researchers.Therefore,this paper reviews different types of EMS CRFID tag and classifies these tags based on structure design emphasizing their significant geometries in comparison with performance parameters.Antenna and coding methods of the EMS CRFID are also elaborated,contrasting the tag capacity and coding performance.Finally,we briefly summarize the challenges and limitations in this emerging field and look forward to the prospects of future CRFID. | Qingjuan Li Rana Sadaf Anwar Huansheng Ning Jun Wang Lingfeng Mao | 2020 | Digital Communications and Networks2020，6，3： | 2 |
| 11 | Nitrogen-doped lignin based carbon microspheres as anode material for high performance sodium ion batteries显示文摘Nitrogen-doped lignin-based carbon microspheres are synthesized using 3-aminophenol as a nitrogen source by the hydrothermal method.The structural change and the effect on the electrochemical properties are systematically investigated. Nitrogen-doped lignin-based carbon microspheres represent well-developed spherical morphology with many active sites, ultramicroporous(< 0.7 nm) structure, and large interlayer spacing. Consistent with the obtained physical structures and properties, the nitrogen-doped carbon microspheres exhibit fast sodium ion adsorption/intercalation kinetic process and excellent electrochemical performance. For example, a reversible specific capacity of 374 m Ah g^(-1) at 25 m A g^(-1) with high initial coulombic efficiency of 85% and high capacitance retention of 90% after 300 cycles at 100 m A g^(-1) and stable charge/discharge behavior at different current density is obtained. The additional defects and abundant ultramicroporous structure can enhance sloping capacity, and large interlayer spacing is considered to be the reason for improving plateau capacity. | Linlin Fan Zhiqiang Shi Qingjuan Ren Lei Yan Fuming Zhang Liping Fan | 2021 | Green Energy & Environment2021，6，2： | 1 |
| 12 | The clinical application of multi-slice spiral CT angiography in abdominal aortic disease显示文摘Objective: To evaluate the clinical application of multi-slice spiral CT angiography(MSCTA) in the assessment of abdominal aortic disease. Methods: Fifty-four patients underwent multi-slice spiral CT angiography of abdomen. Contrast agent (Omnipaque 300 I g/L) 1.5 ml/kg was injected and the injection rate was 3 ml/s. The delay time was determined by bolus tracking technique, T11 level abdominal aorta was set as the target vessel and the threshold was 180-200 Hu, slice width was 3 mm and with a pitch of 4-6. Original data were transferred to working-station to perform functional reconstruction. Results: Ten cases were normal, twenty-eight cases were abdominal aortic aneurysms, five abdominal aortic dissecting aneurysms (Debakay type Ⅲ) and eleven aortic sclerosis. SSD showed the body of aneurysm and the relationship between aneurysm and adjacent blood vessel, MIP better displayed calcification of blood vessel wall and condition of the stent, MPR demonstrated true and false lumen, rupture site of abdominal aorta intima and mural thrombus. Conclusion: MSCTA axial and reconstruction image can show the extent of abdominal aortic disease and the relationship with adjacent blood vessels. It is a safe, simple and non-invasive examination method. | Qing Xu Qingjuan Huang Wenhua Chen | 2005 | Journal of Nanjing Medical University2005，19，5： | 1 |
| 13 | Biodiesel production from oleaginous microorganisms显示文摘 | Xin Meng Jianming Yang Xin Xu Lei Zhang Qingjuan Nie Mo Xian | 2008 | Renewable Energy2008，，1： | 1 |
| 14 | Dewaterability of waste activated sludge with ultrasound conditioning显示文摘 | Xin Feng Jinchuan Deng Hengyi Lei Tao Bai Qingjuan Fan Zhaoxu Li | 2008 | Bioresource Technology2008，，3： | 1 |
| 15 | Comparison of structures and anticoagulant activities of fucosylated chondroitin sulfates from different sea cucumbers显示文摘 | Shiguo Chen Changhu Xue Li’ang Yin Qingjuan Tang Guangli Yu Wengang Chai | 2010 | Carbohydrate Polymers2010，，2： | 1 |
| 16 | Phosphorylation of PRAS40‐Thr246 Involved in Renal Lipid Accumulation of Diabetes显示文摘 | Jun Hao Fan Li Wei Liu Qingjuan Liu Shuxia Liu Hongbo Li Huijun Duan | 2014 | Physiol2014，，8： | 1 |
| 17 | An ensemble of Monte Carlo uninformative variable elimination for wavelength selection 显示文摘 | HAN Qingjuan WU Hailong CAI Chenbo | 2008 | Anal Chim Acta2008，612，2： | 1 |
| 18 | Dewaterability of waste activated sludge with ultrasound conditioning显示文摘 | Xin Feng Jinchuan Deng Hengyi Lei Tao Bai Qingjuan Fan Zhaoxu Li | 2008 | Bioresource Technology2008，，3： | 1 |
| 19 | Preparation of high PMMA grafted particle SiO2 using surface initiated free radical polymerization显示文摘 | Gao Baojiao Li Din Lei Qingjuan | 2011 | Journal of Polymer Research2011，18，6： | 1 |
| 20 | A strongly convergent norm-relaxed method of strongly sub-feasible direction for optimization with nonlinear equality and inequality constraints显示文摘 | Jian Jinbao Xu Qingjuan Han Daolan | 2006 | Appl Math Comput2006，182，： | 1 |
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