检索结果-南通市图书馆

Tick-borne Pathogens in Shanxi Province, China

在线全文

学校读者我要写书评

暂无评论

Biomedical and Environmental Sciences 2021年第5期34卷 410-415页

作者： YANG Xiao Na YANG Hui Jun ZHANG Lin hou Xue Xia MIAO Guang qing CAO Hong Bing hao Rui E hao Qin State Key Laboratory for Infectious Disease Prevention and Control National Institute for Communicable Disease Control and PreventionChinese Center for Disease Control and PreventionBeijing 102206China Shanxi Provincial Center for Disease Control and Prevention Taiyuan 030012ShanxiChina

Ticks are recognized as one of the most important vectors that cause diseases in animals and humans,and have significant public health impacts worldwide[1].They have a wide range of hosts among terrestrial vertebrates,including mammals,birds,*** numerous zoonotic pathogens transmitted by ticks are the causative agents of Lyme disease,rickettsiosis,ehrlichioses,relapsing fever,Q fever,and *** of tick-borne diseases are increasing around the world and some emerging or re-emerging pathogens are being discovered,which pose great challenges for prevention and control.

关键词： prevention Shanxi birds

A pilot study on vitrectomy combined with scleral shortening for eyes with myopic macular retinoschisis——2y follow-up results

在线全文

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2021年第2期14卷 263-268页

作者： Peng Zhang Cun-Xi Ye Ling-Xin hou Yu-Hua hao Kun Wang qing-Li Shang Department of Ophthalmology the Second Hospital of HebeiMedical UniversityShijiazhuang 050000Hebei ProvinceChina

AIM:To evaluate the effect of vitrectomy combined with scleral shortening for eyes with myopic macular ***:Thirty-seven patients with myopic macular retinoschisis who underwent pars plana vitrectomy(PPV)combined with scleral shortening were *** length(AL),the height of macular retinoschisis,the height of retinal detachment if existed,the diameter of macular hole if existed and best corrected visual acuity(BCVA)were *** preoperative and postoperative parameters were ***:At postoperative 24 mo,the mean AL and height of macular retinoschisis were reduced significantly by 0.79 mm and 256.51μm(t=8.064,P<0.0001;Z=-5.086,P<0.0001)*** addition,the mean height of retinal detachment and diameter of macular hole were also reduced significantly by 365.38μm and 183.68μm(Z=-4.457,P=0.000008;Z=-2.983,P=0.003)***,the postoperative BCVA was improved markedly(Z=-2.126,P=0.033).CONCLUSION:Vitrectomy combined with scleral shortening is an effective surgical method for eyes with myopic macular retinoschisis,whether or not macular hole and retinal detachment are present.

关键词： macula retinoschisis myopia scleral shortening vitrectomy

后路C_(2-3)固定结合顶棒置入与单纯后路C_(2-3)固定治疗不稳定Hangman骨折的比较

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国组织工程研究 2025年第9期29卷 1848-1854页

作者：张浩王清张建李广州王高举西南医科大学附属医院骨科四川省泸州市646000

背景:Hangman骨折中Ⅱ、ⅡA、Ⅲ型常需手术治疗,手术方式选择存在较大争议,目前均存在术后复位不全及畸形愈合等不足;前期作者团队使用C_(2-3)拉力螺钉结合经口顶棒技术间歇性推顶C2椎体治疗不稳定Hangman骨折,取得了满意的临床疗效,但... 详细信息

背景:Hangman骨折中Ⅱ、ⅡA、Ⅲ型常需手术治疗,手术方式选择存在较大争议,目前均存在术后复位不全及畸形愈合等不足;前期作者团队使用C_(2-3)拉力螺钉结合经口顶棒技术间歇性推顶C2椎体治疗不稳定Hangman骨折,取得了满意的临床疗效,但前期研究样本少,且缺少对照组比较。目的:比较后路C_(2-3)固定结合经口顶棒技术和单纯后路C_(2-3)固定治疗不稳定Hangman骨折的临床疗效。方法:回顾性分析西南医科大学附属医院收治的行后路C_(2-3)固定手术治疗的55例不稳定Hangman骨折患者临床及影像学资料,根据手术方案分为2组,其中23例患者接受后路C_(2-3)固定结合经口顶棒技术治疗(A组),32例接受单纯后路C_(2-3)固定术(B组)。比较两组患者的手术时间、术中出血量、并发症、术前及末次随访时疼痛目测类比评分、颈椎功能障碍指数、美国脊髓损伤协会脊髓损伤分级和患者满意度(Odom’s分级);另外对比各观察时间点C_(2-3)移位和成角及其他影像学指标的变化。结果与结论:①两组患者手术时间、术中出血量和术后并发症发生情况比较差异无显著性意义(P>0.05);②两组患者末次随访颈痛目测类比评分和颈椎功能障碍指数较术前获得显著改善(P0.05);③两组术前C_(2-3)成角和位移差异无显著性意义(P>0.05);术后及末次随访时,两组患者C_(2-3)成角和位移均较术前明显减小,差异有显著性意义(P0.05);术后及末次随访时,A组C_(2-3)位移和成角较B组明显减小,差异有显著性意义(P<0.05);④末次随访时,A组患者均未发生残余畸形,B组发生残余畸形4例(13%,4/32);⑤因此,后路C_(2-3)固定结合经口顶棒技术可能有利于枢椎体复位和稳定,减少畸形愈合,获得更好的复位。

关键词： Hangman骨折顶棒技术后路拉力螺钉骨折复位内固定

Some results on the algebraic immunity of Boolean functions

在线全文

学校读者我要写书评

暂无评论

The Journal of China Universities of Posts and Telecommunications 2011年第2期18卷 102-105页

作者： XU Li-qing CHEN hao Software Engineering Institute East Normal University Shanghai 200062 China

From the motivation of algebraic attacks on stream and block ciphers,the concept of algebraic immunity（AI） of a Boolean function was introduced and studied *** algebraic immunity is a necessary condition for resisting algebraic *** this paper,we give some lower bounds on the algebraic immunity of Boolean *** results are applied to give lower bounds on the AI of symmetric Boolean functions and rotation symmetric Boolean *** balanced rotation symmetric Boolean functions with their AI near the maximum possible value「n/2」are constructed.

关键词： algebraic attack Boolean function AI symmetric Boolean function rotation symmetric Boolean function

Effect of Rotational Tillage on Soil Aggregates, Organic Carbon and Nitrogen in the Loess Plateau Area of China

在线全文

学校读者我要写书评

暂无评论

Pedosphere 2013年第4期23卷 542-548页

作者： hou Xian-qing LI Rong JIA Zhi-Kuan HAN qing-Fang Chinese Institute of Water-Saving Agriculture Northwest A&F University Key Laboratory of Crop Physi-Ecology and Tillage Science in Northwestern Loess Plateau Ministry of Agriculture Northwest A&F University School of Agriculture Ningxia University

In rain-fed semi-arid agroecosystems, continuous conventional tillage can cause serious problems in soil quality and crop production, whereas rotational tillage （no-tillage and subsoiling） could decrease soil bulk density, and increase soil aggregates and organic carbon in the 0-40 cm soil layer. A 3-year field study was conducted to determine the effect of tillage practices on soil organic carbon （SOC）, total nitrogen （TN）, water-stable aggregate size distribution and aggregate C and N sequestration from 0 to 40 cm soil in semi-arid areas of southern Ningxia. Three tillage treatments were tested： no-tillage in year 1, subsoiling in year 2, and no-tillage in year 3 （NT-ST-NT）; subsoiling in year 1, no-tillage in year 2, and subsoiling in year 3 （ST-NT-ST）; and conventional tillage over years 1-3 （CT）. Mean values of soil bulk density in 0-40 cm under NT-ST-NT and ST-NT-ST were significantly decreased by 3.3% and 6.5%, respectively, compared with CT, while soil total porosity was greatly improved. Rotational tillage increased SOC, TN, and water-stable aggregates in the 0-40 cm soil, with the greatest effect under ST-NT-ST. In 0-20 and 2（}-40 cm soils, the tillage effect was confined to the 2-0.25 mm size fraction of soil aggregates, and rotational tillage treatments obtained significantly higher SOC and TN contents than conventional tillage. No significant differences were detected in SOC and TN contents in the 〉 2 mm and 〈 0.25 mm aggregates among all treatments. In conclusion, rotational tillage practices could significantly increase SOC and TN levels, due to a fundamental change in soil structure, and maintain agroecosystem sustainability in the Loess Plateau area of China.

关键词： semi-arid region SOC sorage soil bulk density tillage practice water-stable aggregates

100 cm^(2) Organic Photovoltaic Cells with 23%Efficiency under Indoor Illumination

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2022年第8期40卷 979-988,I0011页

作者： Yong Cui Hui-Feng Yao Ye Xu Peng-qing Bi Jian-Qi Zhang Tao Zhang Ling Hong Zhi-hao Chen Zhi-Xiang Wei Xiao-Tao hao Jian-Hui hou Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular SciencesCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing100190China University of Chinese Academy of Sciences Beijing100049China CAS key laboratory of nanosystem and hierarchical fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing100190China School of Physics State Key Laboratory of Crystal MaterialsShandong UniversityJinan250100China

The application of organic photovoltaic(OPV)cells to drive off-grid microelectronic devices under indoor light has attracted broad *** organic semiconductors intrinsically have less ordered intermolecular packing than inorganic materials,the relatively larger energetic disorder is one of the main results that limit the photovoltaic efficiency of the OPV cells at low carrier ***,we optimize the alkyl chains of non-fullerene acceptors to get suppressed energetic *** find the optimal acceptor DTz-R1 with the shortest alkyl chain has the strongest crystalline property and lowest energetic *** a result,over 26%efficiency is recorded for the 1 cm^(2) OPV cells under a light-emitting diode illumination of 500 *** also fabricate a 100 cm^(2) cell device and get a PCE of 23.0%,which is an outstanding value for large-area OPV *** results suggest that modulation of the energetic disorder is of great importance for further improving the efficiency of OPV cells,especially for indoor applications.

关键词： Organic photovoltaic cells Low light intensity Energetic disorder Energy loss Power conversion efficiency

Task Scheduling for Multi-Cloud Computing Subject to Security and Reliability Constraints

在线全文

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2021年第4期8卷 848-865页

作者： qing-Hua Zhu Huan Tang Jia-Jie Huang Yan hou School of Computer Science and Technology Guangdong University of TechnologyGuangzhou 510006China

The rise of multi-cloud systems has been *** safety-critical missions,it is important to guarantee their security and *** address trust constraints in a heterogeneous multi-cloud environment,this work proposes a novel scheduling method called matching and multi-round allocation(MMA)to optimize the makespan and total cost for all submitted tasks subject to security and reliability *** method is divided into two phases for task *** first phase is to find the best matching candidate resources for the tasks to meet their preferential demands including performance,security,and reliability in a multi-cloud environment;the second one iteratively performs multiple rounds of re-allocating to optimize tasks execution time and cost by minimizing the variance of the estimated completion *** proposed algorithm,the modified cuckoo search(MCS),hybrid chaotic particle search(HCPS),modified artificial bee colony(MABC),max-min,and min-min algorithms are implemented in CloudSim to create *** simulations and experimental results show that our proposed method achieves shorter makespan,lower cost,higher resource utilization,and better trade-off between time and economic *** is more stable and efficient.

关键词： Multi-cloud environment multi-quality of service(QoS) reliability security task scheduling

Consistent batch fusion for decentralized multi-robot cooperative localization

在线全文

学校读者我要写书评

暂无评论

Control Theory and Technology 2024年第4期22卷 638-651页

作者： Ning hao Fenghua He Yu Yao Yi hou School of Astronautics Harbin Institute of TechnologyXidazhi StreetHarbin150000HeilongjiangChina

This paper investigates the problem of decentralized multi-robot cooperative *** problem involves collaboratively estimating the poses of a group of robots with respect to a common reference coordinate system using robot-to-robot relative measurements and intermittent absolute measurements in a distributed *** address this problem,we present a decentralized fusion method that enables batch updating to handle relative measurements from multiple robots *** method can improve both the accuracy and computational efficiency of cooperative *** reduce communication costs and reliance on connectivity,we do not maintain the inter-robot state ***,we adopt a covariance intersection(CI)technique to design an upper bound that replaces unknown joint *** propose an optimization method to determine a tight upper bound for the correlations in the joint *** consistency and convergence of our proposed algorithm is theoretically ***,we conduct Monte Carlo numerical simulations and real-world experiments to demonstrate that the proposed method outperforms existing approaches in terms of both accuracy and consistency.

关键词： Multi-robot cooperative localization Decentralized fusion Consistency Covariance intersection

Vertical deformation before and after the 2022 Menyuan Ms6.9 earthquake and analysis of earthquake precursors

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Geodesy and Geodynamics 2023年第6期14卷 582-588页

作者： Sixin Zhang Peng Jia Bowen hou Ming hao The Second Monitoring and Application Center China Earthquake AdministrationXi'an 710054China

This study analyzed the vertical deformation before and after the 2022 Menyuan Ms6.9 earthquake in qinghai Province,China,using leveling profiles across faults measured from Minle County in Gansu Province to Menyuan County in qinghai *** results suggest the following:(1)The amplitude of regional vertical differential motion near the Sunna-Qilian and Lenglongling faults within the Qilian Shan increased before the 2022 Menyuan *** was accompanied by the emergence of high gradient deformation *** at the Tongziba cross-fault leveling site near the Sunan-Qilian fault was *** contrast,deformation at the Daliang cross-fault leveling site near the stepover region(adjacent to the epicenter)between the Lenglongling and Tuolaishan faults was *** 2018,vertical deformation at the Tongziba site notably accelerated,while that at the Daliang site was insignificant.(2)After the 2022 Menyuan earthquake,140—150 mm of subsidence deformation occurred near the Daliang site,while the Tongziba site did not experience significant deformation.(3)Vertical deformation before and after the 2022 Menyuan earthquake conforms with the elastic-rebound theory,and the evolution of pre-earthquake deformation was consistent with the strike-slip fault deformation pattern at different seismogenic stages,i.e.,the relative motion near the locked fault in the late seismogenic stage gradually *** characteristics of strain accumulation and release derived from the vertical deformation before and after the Menyuan MS6.9 earthquake help understand the deformation process of earthquake preparation and earthquake precursors.

关键词： 2022 Menyuan earthquake 2016 Menyuan earthquake Leveling Vertical deformation Elastic rebound