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| 1 | The electromagnetic wave experiment for CSES mission: Search coil magnetometer显示文摘The seismic activities on the Earth can produce a disturbance of the electromagnetic field and particles in the ionosphere. The search coil magnetometer(SCM) mounted on China Seismo-Electromagnetic satellite(CSES) is designed to measure the magnetic field fluctuation of low frequency electromagnetic waves in the frequency range of 10 Hz–20 k Hz. The SCM comprises a three-axis search coil sensor mounted on a 4.5 m boom and an electronic box inside satellite module. The sampling rate of the SCM is 51.2 k Hz and the time resolution of the power spectrum density(PSD) is 2 s. The frequency resolution is 12.5 Hz.There are three operation modes: survey, detailed survey and calibration. In the survey mode, the SCM can provide a PSD in the whole frequency range of 10 Hz–20 k Hz and wave forms in the low frequency range below 2 k Hz while in the detailed survey mode the SCM can provide both PSD and wave forms in the whole frequency range of 10 Hz–20 k Hz. The sensitivity of the SCM instrument is 5.0×10^(-4) n T Hz^(-1/2) at 10 Hz, 5.0×10^(–5) n T Hz^(-1/2) at 200 Hz, 3.4×10^(-5) n T Hz^(-1/2) at 2 k Hz and 1.1×10^(-4) n T Hz^(-1/2) at 20 k Hz. The telemetry rate is ~0.85 Mbps in the survey mode and ~3.0 Mbps in the detailed survey mode. The phase difference between three axes can be made generally with a precision of less than 1.0°. The dynamic range of the SCM instrument is over 100 d B. The orthogonality of three mechanical axes of search coil senor is better than 0.13°. The performance of SCM can satisfy the requirement of scientific objectives of CSES mission. | CAO JinBin ZENG Li ZHAN Feng WANG ZuoGui WANG Yan CHEN Yu MENG QingChun JI ZhanQiang WANG PengFei LIU ZhongWei MA LingYu | 2018 | Science China(Technological Sciences)2018，61，5： | 13 |
| 2 | Chain-type wireless sensor network node scheduling strategy显示文摘In order to reduce power consumption of sensor nodes and extend network survival time in the wireless sensor network(WSN), sensor nodes are scheduled in an active or dormant mode. A chain-type WSN is fundamentally different from other types of WSNs, in which the sensor nodes are deployed along elongated geographic areas and form a chain-type network topology structure. This paper investigates the node scheduling problem in the chain-type WSN. Firstly, a node dormant scheduling mode is analyzed theoretically from geographic coverage, and then three neighboring nodes scheduling criteria are proposed. Secondly, a hybrid coverage scheduling algorithm and dead areas are presented. Finally, node scheduling in mine tunnel WSN with uniform deployment(UD), non-uniform deployment(NUD) and optimal distribution point spacing(ODS) is simulated. The results show that the node scheduling with UD and NUD, especially NUD,can effectively extend the network survival time. Therefore, a strategy of adding a few mobile nodes which activate the network in dead areas is proposed, which can further extend the network survival time by balancing the energy consumption of nodes. | Guangzhu Chen Qingchun Meng Lei Zhang | 2014 | Journal of Systems Engineering and Electronics2014，25，2： | 9 |
| 3 | Application of digital pattern-less molding technology to produce art casting显示文摘Compared with the conventional casting process, digital pattern-less casting technology has many advantages such as good machining accuracy, a short processing cycle, and low production cost. It is a new rapid manufacturing technology for castings, integrated with CAD/CAM, casting, CNC machining and many other advanced technologies. With this digital casting technology, no pattern is needed for making molds; it is precise, f lexible, and green. Usually, art castings have complex structures and are made in small batches or even made in a single-piece, especially for large-sized art castings. So it has the shortcomings of high cost, low eff iciency and long time for making a pattern to produce art castings with the conventional casting processes. However, the digital pattern-less casting technology can be applied to fabricate art castings, since it can greatly shorten the manufacturing cycle and lower the production cost, thus having a very good prospect. In this study, based on the digital pattern-less casting technology, a plaque casting with artistic Chinese characters(a Chinese poem) was designed and manufactured, and the production process was demonstrated in detail. | Chen Li Zhang Wei Wu Chenhong Jia Baochang Xiang Qingchun Qiu Keqiang Li Rongde | 2014 | China Foundry2014，11，6： | 5 |
| 4 | Enhancement of cytotoxic T lymphocyte activity by dendritic cells loaded with Tat-protein transduction domain-fused hepatitis B virus core antigen显示文摘人的免疫不全 virus-1-Tat 蛋白质的蛋白质 transduction 领域(PTD ) 有唯一的力量渗透细胞的膜。综合 Tat-PTD 47 的顺序 57 和肝炎 B 病毒核心抗原(HBcAg ) ,我们拼接这些序列并且连接了熔化基因进 pMAL-c2x 向量。熔化蛋白质被亲密关系层析净化并且与骨头搏动了导出髓的树枝状的房间(DC ) ,和 recombinant 蛋白质的 transduction 被免疫检测荧光抗体试金。当 recombinant HBcAg 在房间的表面上被检测时,结果证明 recombinant PTD-HBcAg 能渗透细胞质进 DC。DC 表面分子的百分比 CD86 和主要 histocompatibility 建筑群 II,和 recombinant PTD-HBcAg 导致的 cytokine (IL-12p70 ) 的生产例如 CD80,比 recombinant HBcAg 或肿瘤坏死 factor-α 导致的那些显著地高。与 PTD-HBcAg 对待的 DC 导致了 T 房间区分进特定的细胞毒素的 T 淋巴细胞(CTL ) 并且提高了杀死反应的 CTL。在结论,表示并且净化的 PTD-HBcAg 熔化蛋白质能通过血浆膜渗透进房间,支持 DC 成熟,并且提高 T 房间反应高效地产生 HBcAg 特定的 CTL。 | Xiaohua Chen Yongsheng Yu Qingchun Pan Zhenghao Tang Jinchao Han Guoqing Zang | 2008 | Acta Biochimica et Biophysica Sinica2008，40，12： | 4 |
| 5 | A Landscape Pattern Analysis Method Based on Boundaries and Nodes:A Case Study in Upper Minjiang River,China显示文摘Traditionally,patch-based analysis at the landscape scale fragmentation has been used in the study of landscape ecology while the study of boundary and node has not been considered as much detail until recently.This study investigated the possibility of applying boundary-and node-based methods in landscape pattern analysis to the upper reaches of the Minjiang River in the southwestern China.Boundary-based and node-based landscape indices were selected to be used in analyzing changes in landscape patterns,and the results were compared with analysis using traditional pattern indices.We compared the responses of patch-area-based,boundary-length-based and node-number-based indices,and concluded that boundary-based and node-based indices are more sensitive to disturbance than patch-based indices with various patterns,and node-based indices are even more sensitive than boundary-based ones.Thus,the results suggest that boundary-based and node-based pattern analysis methods provide helpful supplementary information to traditional patch-based pattern analysis methods.The results about pattern dynamics of landscapes in the upper reaches of the Minjiang River based on boundaries and nodes showed that with human disturbance,the dominance of forest landscape was weakened by other landscape types;thus the landscape pattern of the study area became more homogeneous and the boundary network became more complex.These changes further augmented disturbance interfaces in the landscape and increased the possibilities of further landscape fragmentation. | WEN Qingchun LI Xiuzhen HE Hongshi HU Yuanman CHEN Xin CHANG Yu WANG Wei BU Rencang | 2014 | Chinese Geographical Science2014，24，1： | 3 |
| 6 | Compositional heterogeneity of crude oil and its origin in the Linnan subsag,Linyi County,Shandong Province显示文摘The Linnan subsag is the main oil producer of the Linpan oil zone. Based on the oil group composition,gas chromatography data and biomarker analysis,it was indicated that crude oils from different oilfields varied greatly in group composition and showed obvious heterogeneities in the aspects of precursor type,crude oil maturity and hydrocarbon depositional environment. According to the characteristics of source rocks,three oil populations can be distinguished,i.e.,the southern,northern and transitional oil populations. Furthermore,on the basis of post-reservoir reworking processes,the medium conditions of hydrocarbon-generating environment and differences in maturity,six oil families and twelve sub-families were distinquished. An integrated study suggested that the fac-tors leading to such heterogeneities in crude oil composition mainly include different source rocks,multi-stage oil/gas charging,geo-chromatographic effects during oil/gas migration,reservoir heterogeneities and various post-reservoir secondary alterations. | CHANG Xiangchun DUAN Yunge CHEN Qingchun MA Lixin | 2008 | Chinese Journal Of Geochemistry2008，27，4： | 3 |
| 7 | Volumetric modulation arc radiotherapy with flattening filter-free beams compared with conventional beams for nasopharyngeal carcinoma:a feasibility study显示文摘There is increasing interest in the clinical use of flattening filter-free(FFF) beams.In this study,we aimed to investigate the dosimetric characteristics of volumetric modulated arc radiotherapy(VMAT) with FFF beams for nasopharyngeal carcinoma(NPC).Ten NPC patients were randomly selected to undergo a RapidArc plan with either FFF beams(RA-FFF) or conventional beams(RA-C).The doses to the planning target volumes(PTVs),organs at risk(OARs),and normal tissues were compared.The technical delivery parameters for RapidArc plans were also assessed to compare the characteristics of FFF and conventional beams.Both techniques delivered adequate doses to PTVs.For PTVs,RA-C delivered lower maximum and mean doses and improved conformity and homogeneity compared with RA-FFF.Both techniques provided similar maximum doses to the optic nerves and lenses.For the brain stem,spinal cord,larynx,parotid glands,oral cavity,and skin,RA-FFF showed significant dose increases compared to RA-C.The dose to normal tissue was lower in RA-FFF.The monitor units(MUs) were(536 ± 46) MU for RA-FFF and(501± 25) MU for RA-C.The treatment duration did not significantly differbetween plans.Although both treatment plans could meet clinical needs,RA-C is dosimetrically superior to RA-FFF for NPC radiotherapy. | Mingzan Zhuang Tuodan Zhang Zhijian Chen Zhixiong Lin Derui Li Xun Peng Qingchun Qiu Renhua Wu | 2013 | Chinese Journal of Cancer2013，32，7： | 3 |
| 8 | Graphene oxide-silver/cotton fiber fabric with anti-bacterial and anti-UV properties for wearable gas sensors显示文摘Wearable gas sensors can improve early warning provision for workers in special worksites and can also be used as flexible electronic platforms.Here,the flexible multifunctional gas sensor was prepared by grafting graphene oxide(GO)-Ag onto cotton fabric after swelling.The maximum bacterial inhibition rate of GO-150/cotton fabric was 95.6%for E.coli and 87.6%for S.aureus,while retaining the original high moisture permeability of cotton fabric.So GO/cotton fabric can resist the multiplication of bacteria.At the same time,GO can greatly improve the UV protection performance of cotton fabric used in garments.With increase of the GO concentration,the UV protection ability of composite fabric is enhanced.Finally,GO-Ag/cotton fabric sensors had stable NH3 gassensitive properties and good washing stability.In conclusion,these cotton fabric sensors with antibacterial properties,UV resistance and highly sensitive gas-sensitive properties have potential applications in wearable early warning devices and textile products. | Xia HE Qingchun LIU Ying ZHOU Zhan CHEN Chenlu ZHU Wanhui JIN | 2021 | Frontiers of Materials Science2021，15，3： | 2 |
| 9 | Acoustic emission source location method and experimental verification for structures containing unknown empty areas显示文摘Acoustic emission(AE)localization plays an important role in the prediction and control of potential hazardous sources in complex structures.However,existing location methods have less discussion on the presence of unknown empty areas.This paper proposes an AE source location method for structures containing unknown empty areas(SUEA).Firstly,this method identifies the shape,size,and location of empty areas in the unknown region by exciting the active AE sources and using the collected AE arrivals.Then,the unknown AE source can be located considering the identified empty areas.The lead break experiments were performed to verify the effectiveness and accuracy of the proposed method.Five specimens were selected containing empty areas with different positions,shapes,and sizes.Results show the average location accuracy of the SUEA increased by 78%compared to the results of the existing method.It can provide a more accurate solution for locating AE sources in complex structures containing unknown empty areas such as tunnels,bridges,railroads,and caves in practical engineering. | Longjun Dong Qing Tao Qingchun Hu Sijia Deng Yongchao Chen Qiaomu Luo Xihong Zhang | 2022 | International Journal of Mining Science and Technology2022，32，3： | 2 |
| 10 | Evaluation of cerebrovascular reactivity by ultrasonography in type 2 diabetic patients with hypertension显示文摘BACKGROUND: Cerebrovascular reactivity (CVR) reflects cerebrovascular reserve capacity, and cerebrovascular reactivity damage prognosticates a very high risk of stroke. OBJECTIVE: To evaluate CVR by detecting the increase rate of blood flow volume of middle cerebral artery (MCA) before and after breathholding in diabetic patients with hypertension, and observe the effects of hypertension on cerebrovascular reserve capacity of diabetic patients. DESIGN: Controlled observation. SETTINGS: Department of Function, Affiliated Hospital of Hebei University; Department of Special Diagnosis, the 202 Hospital of Chinese PLA. PARTICIPANTS: Inpatients or outpatients with type 2 diabetes mellitus (DM) or primary hypertension admitted to Departments of Gastroenterology and Cardiology, Affiliated Hospital of Hebei University and the 202 Hospital of Chinese PLA from April to December 2004 were involved in this experiment. Inclusive criteria: type 2 DM met the criteria of the report on diabetes diagnosis announced in 1999 by WHO expert committee, totally 88 patients were involved. Primary hypertension met the diagnosis criteria announced in 1999 by WHO/ISH, totally 42 patients were involved. Another group of 43 concurrent subjects who received physical examination served as controls. According to the disease condition, the involved patients were assigned into 3 groups: DM group (only diabetic patients), hypertension group (only hypertension patients) and DM complicated with hypertension group (diabetic patients with hypertension). Informed consent for the examination was obtained from all the involved subjects. METHODS: Before MCA of subjects was detected, bilateral carotid artery was routinely detected by high-frequency ultrasonography. Subjects were rejected when stenosis rate of unilateral internal carotid artery or common carotid artery ≥ 70%. Vessels were expanded with transcranial color Duplex Doppler by breath holding test for detecting vascular reactivity. Hypercapnia was created by BHT. The mean velocity and diameter of blood flow were detected under the quiescent condition and 25 s after breath holding with transcranial color-coded duplex sonography. The volume of blood flow of MCA was calculated according to the following formula: Volume of blood flow of MCA (mL/ min) = (the diameter of blood flow /2) 2×π× mean blood flow velocity×60. The increase rates of mean blood flow velocity and blood flow volume of patients with hypercapnia were calculated as compared with under the quiescent condition to evaluate cerebrovascular reactivity. MAIN OUTCOME MEASURES: Mean blood flow velocity, blood flow diameter and MCA blood flow volume as well as the increase rates of them. RESULTS: Among the 173 participates, 103 patients and 39 healthy controls were involved in the final analysis, and the other 31 dropped out due to not accomplishing the examination. ①Comparison of blood flow parameter of MCA under the quiescent condition: The mean blood flow velocity of DM complicated by hypertension group was significantly higher than that of DM group (P < 0.05) and control group (P < 0.05); The blood flow diameter of DM complicated by hypertension group was significantly smaller than that of control group (P < 0.01). Under the quiescent condition, significant difference was not found in the intergroup comparison of blood flow volume of MCA. ② Comparison of increase rate of blood flow parameter: In the DM group, hypertension group, DM complicated by hypertension group and control group, the increase rate of mean blood flow velocity of was (29.34±4.50)%,(29.35±4.35)%,(26.68±4.99)% and (30.99±3.54)%, respectively, the increase rate of blood flow volume of MCA was (35.32±5.08)%, (35.36±6.16)%,(31.78±7.11)% and(37.26±4.17)%, respectively, and the increase rate of blood flow diameter was (2.29±1.09)%,(2.27±0.95)%,(1.97±1.05)% and(2.36±0.46)%, respectively. The increase rate of mean blood flow velocity and that of blood flow volume of MCA in the DM complicated byhypertension group were significantly lower than those in the other 3 groups (P < 0.05). CONCLUSION: CVR is markedly lowered and cerebrovascular reserve capacity is damaged in diabetic patients with hypertension. | Jinhui Zhao Yuxiang Chen Zhen Zhao Qingchun Zhao Dongmei Hao ShanshanTang | 2007 | Neural Regeneration Research2007，2，5： | 2 |
| 11 | Wearable gas/strain sensors based on reduced graphene oxide/linen fabrics显示文摘Multifunctional wearable e-textiles have been a focus of much attention due to their great potential for healthcare,sportswear,fitness,space,and military applications.Among them,electroconductive textile yarn shows great promise for use as the next-generation flexible sensors without compromising properties and comfort of usual textiles.Recently,a myriad of efforts have been devoted to improving performance and functionality of wearable sensors.However,the current manufacturing process of metal-based electroconductive textile yarn is expensive,unscalable,and environmentally unfriendly.In this work,we report the preparation of multifunctional reduced graphene oxide/linen(RGO/LN)fabrics through the reduction and the followed suction filtration.Asprepared RGO/LN fabric could serve as the methane gas sensor,which exhibited high sensitivity,remarkable reliability and feasibility.Furthermore,the RGO/LN fabric sensor exhibited good moisture permeability and air permeability.The present work reveals that RGO/LN fabric has great potential as wearable smart devices in personal healthcare applications. | Xia HE Qingchun LIU Jiajun WANG Huiling CHEN | 2019 | Frontiers of Materials Science2019，13，3： | 2 |
| 12 | Fabricating of Open-cell Porous Al-Si Alloy with Pressure Penetration Casting显示文摘Open-cell porous Al alloy was fabricated by pressure penetration casting. The fabrication ofpreform was studied in detail. When forming temperature is about 700℃ and binder contentis about 10%, preform with high compressive strength is obtained. Good porous Al alloy withpore size (0.5-1.6 mm) and porosity (60%-80%) can be obtained under 100℃ superheatingof liquid metal and about 1.0 MPa applied pressure. The size of the largest sample is up to100 mm in diameter and 100 mm in height. With the help of SEM it was found that the obtainedmaterial is a three-dimension open-cell porous structure with well-distributed and connected witheach other pores. Finally theoretical analysis was carried out to explain the efect of fabricatingprocess. | Xu, Qingyan Chen, Yuyong Li, Qingchun
| 1999 | Journal of Materials Science & Technology1999，15，1： | 2 |
| 13 | Validation of the simplified criteria for diagnosis of autoimmune hepatitis in Chinese patients显示文摘 | Dekai Qiu Qixia Wang Hui Wang Qing Xie Guoqing Zang Hong Jiang Chuantao Tu Jinsheng Guo Shuncai Zhang Jianshe Wang Yi Lu Ying Han Lei Shen Xiaoyu Chen Xiqi Hu Xiaojin Wang Chengwei Chen Qingchun Fu Xiong Ma | 2010 | Journal of Hepatology2010，，： | 2 |
| 14 | Design, Synthesis and Biological Activities of N-(Furan-2-ylmethyl)-lH-indole-3-carboxamide Derivatives as Epidemal Growth Factor Receptor Inhibitors and Anticancer Agents显示文摘 | ZHANG Lan DENG Xinshan WU Jiaofeng MENG Guangpeng LIU Congchong CHEN Guzhou ZHAO Qingchun HU Chun | 2017 | Chemical Research in Chinese Universities2017，33，3： | 1 |
| 15 | Combination of MALDI-TOF mass spectrometry with immobilized enzyme microreactor for peptide mapping显示文摘 | Honghai Jiang Hanfa Zou Hailin Wang Qiang Zhang Jianyi Ni Qingchun Zhang Zhong Guo Xiaoming Chen | 2000 | Science in China Series B: Chemistry2000，，6： | 1 |
| 16 | 显示文摘 | Zhao Qingchun Chen Wenming Zhu Qingren | 2004 | Nanotechnology2004，15，： | 1 |
| 17 | Performance analysis of hybrid ARQ with code combining over interleaved Ray- leigh fading channel 显示文摘 | Chen Qingchun Fan Pingzhi | 2005 | IEEE Trans Veh Technol2005，54，3： | 1 |
| 18 | Use of oral anticoagulation among stroke patients with atrial fibrillation in C hina: the C hina QUEST ( Q uality evaluation of stroke care and treatment) registry study显示文摘 | Qingchun Gao Xian Fu Jade W. Wei Xiangyan Chen Yining Huang Jiguang Wang Craig S. Anderson Ka Sing Wong | 2011 | Int J Stroke2011，，3： | 1 |
| 19 | The delivery of HBcAg via Tat-PTD enhances specific immune response and inhibits Hepatitis B virus replication in transgenic mice显示文摘 | Xiaohua Chen Jinglan Lai Qingchun Pan Zhenghao Tang Yongsheng Yu Guoqing Zang | 2010 | Vaccine2010，，23： | 1 |
| 20 | E^2KF Based Joint Multiple CFOs and Channel Estimate for MIMO-OFDM Systems over High Mobility Scenarios显示文摘 | QIAO Jing CHEN Qingchun SHEN Feifei | 2014 | China Communications2014，11，A01： | 1 |
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