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Understanding Relationship Between Accessibility and Economic Growth:A Case Study from China(1990–2010)

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Chinese Geographical Science 2016年第6期26卷 803-816页

作者： JIAO Jingjuan WANG Jiaoe JIN Fengjun du chao Key Laboratory of Regional Sustainable Development Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China

China′s economy and transport infrastructure have both experienced rapid development since 1978, and especially since 1990. Today, China is the second-largest economic entity in terms of GDP and has the largest high-speed rail(HSR) network and the second-largest expressway network in the world. This paper explores the relationship between accessibility and economic growth in China from 1990 to 2010. In the study, the basic research units include 333 prefecture-level cities and four municipalities. We explore a bivariate analysis framework of accessibility and economic growth, and their increase rates, to examine this relationship using long-term panel data. The results indicate that, first, accessibility and economic growth show a significant positive relationship using both cross-section and panel data, while the increase rate in accessibility and GDP indicate no significant relationship using cross-section data and a poor significant relationship using panel data. Second, the distributions of local advantage are uneven. Cities with low local advantage with respect to accessibility and GDP are mainly located in China′s eastern coastal region or the provincial capitals, while those with low local advantage in terms of their increase rates are located in the western region. Third, as China′s economic growth and transport networks have evolved, the distribution of local advantage shows little change in terms of accessibility and GDP, but a greater change in terms of their increase rates, which is largely influenced by the distribution of expressway and HSR networks.

关键词： accessibility economic growth China GDP transport infrastructure

Center, Limit Cycles and Isochronous Center of a Z_4-equivariant Quintic System

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Acta Mathematica Sinica,English Series 2010年第6期26卷 1183-1196页

作者： chao Xiong du Hei Long MI Yi Rong LIU Department of Hu'nan Shaoyang University Shaoyang 422000 P. R. China and School of Mathematics Central South University Changsha 410083 P. R. China Department of Information Science Hu'nan Commercial University Changsha 410083 P. R. China School of Mathematics Central South University Changsha 410083 P. R. China

In this paper, we study the limit cycles bifurcations of four fine focuses in Z4-equivariant vector fields and the problems that its four singular points can be centers and isochronous centers at the same time. By computing the Liapunov constants and periodic constants carefully, we show that for a certain Z4-equivariant quintic systems, there are four fine focuses of five order and five limit cycles can bifurcate from each, we also find conditions of center and isochronous center for this system. The process of proof is algebraic and symbolic by using common computer algebra soft such as Mathematica, the expressions after being simplified in this paper are simple relatively. Moreover, what is worth mentioning is that the result of 20 small limit cycles bifurcating from several fine focuses is good for Z4-equivariant quintic system and the results where multiple singular points become isochronous centers at the same time are less in published references.

关键词： Z4-equivariant focal value center limit cycles isochronous center

Delayed massive cerebral infarction after perioperative period of anterior cervical discectomy and fusion:A case report

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World Journal of Clinical Cases 2021年第28期9卷 8602-8608页

作者： Fei Jia Chuan-chao du Xiao-Guang Liu Department of Orthopedics Peking University Third HospitalBeijing 100191China

BACKGROUND Cerebral infarction is an extremely rare postoperative complication of anterior cervical discectomy and fusion(ACDF),particularly in the delayed *** present a case who had a sudden stroke on day 18 after *** sharing our experience with this case,we hope to provide new information about stroke after anterior cervical *** SUMMARY We present the case of a 61-year-old man with more than 20 years of hypertension and 14 years of coronary heart disease who had suffered a stroke 11 years *** patient was admitted for a multiple ACDF due to symptoms of cervical spondylotic myelopathy and had a sudden stroke on day 18 after *** findings showed a large-area infarct of his left cerebral hemisphere and thrombosis in his left common carotid *** the consent of his family,the thrombus was removed and a vascular stent was implanted through an interventional *** days later,the patient was transferred to a rehabilitation hospital for further *** had normal consciousness but slurred speech at the 1-year follow-up *** motor and sensory functions of his hemiplegic limbs partially *** This case illustrated that a postoperative stroke related to anterior cervical surgery may be attributed to prolonged carotid retraction and might have a long silent *** measures include careful preoperative and postoperative examination for high-risk patients as well as gentle and intermittent retraction of carotid artery sheath during operation.

关键词： Anterior cervical discectomy and fusion Cerebral infarction Carotid artery Postoperative complication Case report

Therapeutic efficacy of acupuncture combined with neuromuscular joint facilitation in treatment of hemiplegic shoulder pain

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World Journal of Clinical Cases 2019年第23期7卷 3964-3970页

作者： Yan-Hui Wei De-chao du Ke Jiang Department of Rehabilitation Nanjing University of Chinese MedicineNanjing 210028Jiangsu ProvinceChina Department of Rehabilitation Nanjing Red Cross HospitalNanjing 210028Jiangsu ProvinceChina Department of Rehabilitation Physiotherapy Jiangsu Provincial Hospital of Integration of Chinese and Western MedicineNanjing 210028Jiangsu ProvinceChina

BACKGROUND Stroke is a type of cerebrovascular disease with high prevalence,mortality,and onset of *** a neurodevelopmental therapy,neuromuscular joint facilitation(NJF)is widely used in the treatment of orthopedic and neurological disorders in the clinical *** is mainly used for central nervous system diseases or orthopedic diseases,movement disorders,and pain *** to related studies,NJF can also be used as a rehabilitation treatment in patients with hemiplegic shoulder pain(HSP).AIM To investigate the clinical efficacy of acupuncture combined with NJF in patients with *** Forty patients with HSP were randomly divided into a treatment group and a control *** treatment group was treated with acupuncture combined with NJF and the control group was treated with acupuncture *** patients were assessed by using the visual analogue scale(VAS),Fugl-Meyer assessment(FMA),Barthel index(BI),and passive range of motion(PROM)before and after the *** the clinical data were analyzed using SPSS 20.0 statistical *** There was no statistical difference in the general characteristics between the two *** the terms of duration of treatment,age,and pre-treatment indicators,the two groups were comparable(P>0.05).After the treatment,VAS,PROM,BI,and FMA scores were significantly improved in the two groups of patients(P0.05).CONCLUSION Both acupuncture alone and acupuncture combined with NJF in the treatment of HSP are effective,and can improve the clinical symptoms of *** combined with NJF can improve the upper limb motor function,relieve pain,and increase joint mobility in patients with *** combination therapy is better than acupuncture ***,there is no significant difference in

关键词： Acupuncture Neuromuscular joint facilitation Hemiplegic shoulder pain Visual analogue scale Fugl-Meyer assessment Therapy

The short and long-term effect of polystyrene nanoplastics on nitrifying sludge at high nitrite concentrations

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Journal of Environmental Sciences 2024年第1期135卷 222-231页

作者： Xiaolong Wang Jialu Huang Zhiqiang Qi Ruiqin Kang chao du Da Li School of Chemical and Environmental Engineering Anyang Institute of TechnologyAnyang 455000China Henan Licheng Environmental Technology Co. Ltd.Anyang 455000China State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin 150090China

The effect of nanoplastics(NPs)on nitrite oxidation bacteria(NOB)community in treating high-strength wastewater remains unclear,which seriously affects the stability of nitrogen removal *** this study,highly active nitrifying sludge was enriched and exposed to 50nm polystyrene NPs(PS-NPs)for short-term(1,100,500,and 1000 mg/L,1.5 hr)and long-term(1,10,100 mg/L,40 days)at high nitrite *** contrast to previous studies,our results showed that the exposures to PS-NPs had little effect on nitrifying *** long-term exposure,the protein/polysaccharide ratios in extracellular polymeric substances(EPS)were positively correlated with PS-NPs concentrations(0.78–0.99).The produced reactive oxygen species(ROS)were gradually removed,and PS-NPs higher than 10 mg/L caused damage to membrane ***-term exposure for 40 days increased the community diversity and caused significant differences between the control and exposed *** control group were dominated by Nitrobacter and Exiguobacterium,while the exposure group was dominated by Bacillus,Mycobacterium,and Nitrospira.A noticeable shift in the NOB community from Nitrobacter(26.5%to 3.4%)to Nitrospira(1.61%to 14.27%)was observed.A KEGG analysis indicated a decrease in cell growth and death,cell motility and energy *** appeared that NOB could adapt to PS-NPs stress through enhanced secretion and removal of oxidative ***,this study provided new insights into the response mechanism of NOB to PS-NPs exposure.

关键词： Nanoplastics Nitrifying activity Extracellular polymeric substance(EPS) Exposure Community analysis

Residual Stress and Deformation Analysis of Static Bonding Multi-layer Pyrex7740 Glass and Aluminum

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Journal of Wuhan University of Technology(Materials Science) 2015年第1期30卷 100-104页

作者：阴旭刘翠荣 NAN Yue du chao REN Yuyan School of Materials Science and Engineering Tai Yuan University of Science and Technology

Residual stresses and deformation of static bonding multi-layer Pyrex7740 glass and aluminum have important effects on performances of bonding parts. The stress and strain finite element analysis of anodic bonding can optimize the structure and process design, reduce the workload of the experiments, shorten the production cycle, improve the bonding quality, and reduce the process costs. In this paper, residual stresses and deformation in the static bonding two-layer （glass/aluminum）, three-layer （glass/aluminum/ glass）,five-layer（glass/aluminum/glass/aluminum/glass）and seven-layer （glass/aluminum/glass/aluminum/glass/ aluminum/glass） samples have been analyzed using nonlinear finite element simulation software MARC. The simulation results show that the shear stress distribution and deformation distribution in different multi-layer glass and aluminum samples are similar. The stress distribution along thickness at different typical positions in all multi-layer samples has characteristics of pulse pattern, which has pulse peak at the position of transition layers and then decreases abruptly to the minimum value at the positions of glass and aluminum. The maximum shear stress is located in the outside surface area in the transition layer between the top unconstrained glass layer and aluminum layer. The displacement distribution along thickness in all multi-layer samples increases gradually fi＇om the constrained bottom glass layer to the top unconstrained glass layer with abrupt step increase in the aluminum layers, The maximum deformations occur in aluminum layers. It is found that the minimum deformation distortion and the minimum shear stress occur in the three-layer static bonding sample.

关键词： static bonding aluminum pyrex glass residual stress deformation

Transmission Cost Allocation by Power Tracing Based Equivalent Bilateral Exchanges

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CSEE Journal of Power and Energy Systems 2016年第2期2卷 1-10页

作者： Yunpeng Xiao Xifan Wang Xiuli Wang chao du Xi’an Jiaotong University Xi’an 710049China

The allocation of transmission cost provides important references and signals for system expansions and *** paper proposes a power tracing based equivalent bilateral exchange(PTEBX)method in which network users are responsible for not only their induced power flows,but also power flows induced by whom they have equivalent bilateral exchanges *** equivalent bilateral exchanges are recognized based on the power *** evaluate the performance of different methods of allocating transmission cost,seven criteria are put forward that take into consideration characteristics of power *** analysis is then conducted to certify whether the methods satisfy the *** results indicate that only the PTEBX method is able to satisfy all the seven *** examples based on the IEEE-30 system are presented to further demonstrate the applicability of the proposed method.

关键词： Bilateral contract trading equivalent bilateral exchanges power tracing transmission cost allocation wind power trading

Laser-RF synchronization based on digital phase detector

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Nuclear Science and Techniques 2017年第4期28卷 97-102页

作者： Jin Yang Ying-chao du Li-Xin Yan Gang Huang Qiang du Yi-Lun Xu Wen-Hui Huang Huai-Bi Chen Department of Engineering Physics Tsinghua UniversityBeijing 100084 China Key Laboratory of Particle and Radiation Imaging (Tsinghua University) Ministry of Education Beijing 100084 China Lawrence Berkeley National Laboratory BerkeleyCA 94720 USA

Laser oscillator synchronization with RF reference signal is ultra-important for a modern light source based on the *** Tsinghua Thomson scattering X-ray source,we have synchronized the mode-locked laser oscillator to RF reference signal with 48.2 fs RMS relative *** fundamental and harmonic signals derived from photo diode detection are used for laser-RF synchronization in our *** fundamental signal is for coarse laser-RF synchronization and multiple laser oscillator *** harmonic signal is for high precise phase *** digital phase detector is implemented in the synchronization scheme for less noise,replacing the mixing to DC phase detection *** digital processing algorithm for synchronization is commonly used in low-level RF control *** order to test the phase locking loop logic without damaging the real laser oscillator,a laser oscillator emulator was developed for phase *** paper will report the laser-RF synchronization scheme and its *** laser oscillator emulator system will also be introduced here.

关键词： Laser oscillator Synchronization RF LLRF Emulator

Survey of Electric Vehicle Charging Load and Dispatch Control Strategies

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中国电机工程学报 2013年第1期33卷 I0001-I0024页

作者： WANG Xifan SHAO Chengcheng WANG Xiuli du chao Xi'an Jiaotong University