检索结果-南通市图书馆

Outbreak of Mycoplasma pneumoniae at a military academy

在线全文

学校读者我要写书评

暂无评论

Military Medical Research 2021年第3期8卷 447-449页

作者： Xin Zhang Min-Na Han Jing-Hui Dong Xiao-Xi Li Xian-Yun Hu Zhi Wang En-Qiang Qin Jing Li jun-yuan tan Fu-Sheng Wang Lei Huang Center for Infectious Disease the Fifth Medical Center of Chinese PLA General HospitalBeijing 100039China Southern Distract Health Service of Chinese PLA General Hospital Beijing 100039China Radiology Department the Fifth Medical Center of Chinese PLA General HospitalBeijing 100039China Clinical Lab Center the Fifth Medical Center of Chinese PLA General HospitalBeijing 100039China Medical Service Department the Fifth Medical Center of Chinese PLA General HospitalBeijing 100039China

In 2019, an outbreak of Mycoplasma pneumoniae(M. pneumoniae) occurred at a military academy in China. The attack rate(10.08%, 60/595) was significantly different among the units. High-intensity training and crowded environments to which cadets are exposed are the high risk factors for the outbreak of M. pneumoniae. In-time prevention and control measures effectively controlled the spread of the epidemic.

关键词： Mycoplasma pneumoniae Epidemiological survey Disease control and prevention

Common COVID-19 should be distinguished from acute respiratory infections by other viruses during prehospital treatment

在线全文

学校读者我要写书评

暂无评论

Infectious Diseases Research 2022年第1期3卷 10-11页

作者： Chen Li Lei Wei jun-yuan tan Xing-Long Yang Senior Department of Hepatology Fifth Medical Center of Chinese PLA General HospitalBeijing 100039China Medical service department Fifth Medical Center of Chinese PLA General HospitalBeijing 100039China

Dear Editor,The outbreak of the coronavirus disease 2019(COVID-19)caused by the severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)poses a serious threat to global health *** disease severity of patients with symptomatic COVID-19 can be divided into mild,moderate,severe,and critical[1],and more than 80% of the patients have mild and moderate severity(common type)[2].

关键词： respiratory acute severity

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

固囊酵母的一个新种

微生物学通报 2003年第6期30卷 56-58页

作者：张伟李英军袁耀武檀建新河北农业大学食品科技学院保定071001

从中国保定槐茂甜面酱中分离到一株酵母。经鉴定,这株酵母菌属于固囊酵母属(Citeromyces),并为该属中的一个新种,命名为保定团囊酵母(Citeromyces baodingensis ***.)。保定团囊酵母与固囊酵母生理生化特性有显著区别,保定固囊酵母(Cite... 详细信息

从中国保定槐茂甜面酱中分离到一株酵母。经鉴定,这株酵母菌属于固囊酵母属(Citeromyces),并为该属中的一个新种,命名为保定团囊酵母(Citeromyces baodingensis ***.)。保定团囊酵母与固囊酵母生理生化特性有显著区别,保定固囊酵母(Citeromycesbaodingensis)不发酵蔗糖、棉子糖,同化半乳糖和纤维二糖,不同化海藻糖和棉子糖,G+C含量为48.5mol％。

关键词：槐茂甜面酱保定固囊酵母固囊酵母

在线全文

学校读者我要写书评

暂无评论

以科学发展观为指导创新学生管理方法

山东商业职业技术学院学报 2010年第1期10卷 41-42,64页

作者：李军源谭雅静山东商业职业技术学院山东济南250103

深入学习实践科学发展观是我党在十七大作出的一项重要部署。高职院校在多年的理论创新和实践探索下,培养了一批高素质的人才。在新的环境下,高职学生管理要在科学发展观的指导下,树立以学生为本的工作理念,为学生的成长成才服务,实现... 详细信息

深入学习实践科学发展观是我党在十七大作出的一项重要部署。高职院校在多年的理论创新和实践探索下,培养了一批高素质的人才。在新的环境下,高职学生管理要在科学发展观的指导下,树立以学生为本的工作理念,为学生的成长成才服务,实现学生的全面发展。

关键词：科学发展观高职院校学生管理

Precise planar motion measurement of a swimming multi-joint robotic fish

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2016年第9期59卷 183-197页

作者： jun yuan junzhi YU Zhengxing WU Min tan State Key Laboratory of Management and Control for Complex Systems Institute of AutomationChinese Academy of Sciences

This paper presents a method for planar motion measurement of a swimming multi-joint robotic fish. The motion of the robotic fish is captured via image sequences and a proposed tracking scheme is employed to continuously detect and track the robotic fish. The tracking scheme initially acquires a rough scope of the robotic fish and thereafter precisely locates it. Historical motion information is utilized to determine the rough scope, which can speed up the tracking process and avoid possible ambient interference. A combination of adaptive bilateral filtering and k-means clustering is then applied to segment out color markers accurately. The pose of the robotic fish is calculated in accordance with the centers of these markers. Further, we address the problem of time synchronization between the on-board motion control system of the robotic fish and the motion measurement system. To the best of our knowledge, this problem has not been tackled in previous research on robotic fish. With information about both the multi-link structure and motion law of the robotic fish, we convert the problem to a nonlinear optimization problem, which we then solve using the particle swarm optimization(PSO) algorithm. Further, smoothing splines are adopted to fit curves of poses versus time, in order to obtain a continuous motion state and alleviate the impact of noise. Velocity is acquired via a temporal derivative operation. The results of experiments conducted verify the efficacy of the proposed method.

关键词： motion measurement robotic fish time synchronization visual tracking localization

Evaluation of mountain slope stability considering the impact of geological interfaces using discrete fractures model

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Mountain Science 2019年第9期16卷 2184-2202页

作者： WANG Lu-yu CHEN Wei-zhong tan Xu-yan tan Xian-jun yuan Jing-qiang LIU Qi State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil Mechanics Chinese Academy of Sciences Wuhan 430071 China University of Chinese Academy of Science Beijing 100049 China Research Center of Geotechnical and Structural Engineering Shandong University Jinan 250100 China

The stability of rock slope is often controlled by the existing discontinuous surfaces, such as discrete fractures, which are ubiquitously distributing in a geological medium. In contrast with the traditional approaches used in soil slope with a continuous assumption, the simulation methods of jointed rock slope are different from that of in soil slope. This paper presents a study on jointed rock slope stability using the proposed discontinuous approach, which considers the effects of discrete fractures. Comparing with traditional methods to model fractures in an implicit way, the presented approach provides a method to simulate fractures in an explicit way, where grids between rock matrix and fractures are independent. To complete geometric components generation and mesh partition for the model, the corresponding algorithms were devised. To evaluate the stability state of rock slope quantitatively, the strength reduction method was integrated into our analysis framework. A benchmark example was used to verify the validation of the approach. A jointed rock slope, which contains natural fractures, was selected as a case study and was simulated regarding the workflow of our framework. It was set up in the light of the geological condition of the site. Slope stability was evaluated under different loading conditions with various fracture patterns. Numerical results show that fractures have significant contributions to slope stability, and different fracture patterns would lead to different shapes of the slip surface. The devised method has the ability to calculate a non-circular slip surface, which is different from a circular slip surface obtained by classical methods.

关键词： Rock slope stability Discrete fractures Discontinuous approach Equivalent model Slip surface

Isolation of a carbon nanohoop with Mobius topology

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2021年第6期64卷 1004-1008页

作者： Zhen-Lin Qiu Dandan Chen Zeying Deng Ke-Shan Chu yuan-Zhi tan jun Zhu State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials(iChEM)College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China

Carbon nanohoop,a class of constrained molecular architecture consisting of linked arene units,has attracted considerable interest from both experimental and theoretical chemists due to its synthetic challenge and aesthetic *** fascinating and synthetically challenging species,the Mobius-type molecule,has been attracting the scientific community with its elegant structure and ***,combining two things together,synthesizing a carbon nanohoop with Mobius topology remains more challenging to *** we report a cyclophenylene featuring Mobius strip characterized by X-ray *** calculations reveal that such type of nanohoop is fully conjugated systems with electrons delocalized both inπsextets and the bridging carbon–carbon *** work highlights that the manipulation of phenylene connection in a carbon nanohoop can help obtain more delicate and aesthetic molecular architectures.

关键词： nanohoop cyclophenylene Mobius aromaticity

Current Status and Challenge of Pseudorabies Virus Infection in China

在线全文

学校读者我要写书评

暂无评论

Virologica Sinica 2021年第4期36卷 588-607页

作者： Lei tan jun Yao Yadi Yang Wei Luo Xiaomin yuan Lingchen Yang Aibing Wang Laboratory of Animal Disease Prevention and Control and Animal Model Hunan Provincial Key Laboratory of Protein Engineering in Animal VaccinesCollege of Veterinary MedicineHunan Agricultural University(HUNAU)Changsha410128China PCB Biotechnology LLC RockvilleMD20852USA Yunnan Tropical and Subtropical Animal Virus Diseases Laboratory Yunnan Animal Science and Veterinary InstituteKunming650224China Department of Animal Science and Technology Huaihua Vocational and Technical CollegeHuaihua418000China

Pseudorabies(PR),also called Aujeszky's disease,is a highly infectious disease caused by pseudorabies virus(PRV).Without specific host tropism,PRV can infect a wide variety of mammals,including pig,sheep,cattle,etc.,thereby causing severe clinical symptoms and acute *** was firstly reported in China in 1950s,while outbreaks of emerging PRV variants have been documented in partial regions since 2011,leading to significant economic losses in swine *** scientists have been devoting to the design of diagnostic approaches and the development of vaccines during the past years,PR remains a vital infectious disease widely prevalent in Chinese pig ***,its potential threat to human health has also attracted the worldwide *** this review,we will provide a summary of current understanding of PRV in China,mainly focusing on PRV history,the existing diagnosis methods,PRV prevalence in pig population and other susceptible mammals,molecular characteristics,and the available vaccines against its ***,promising agents including traditional Chinese herbal medicines and novel inhibitors that may be employed to treat this viral infection,are also discussed.

关键词： Pseudorabies virus(PRV) Diagnosis methods Prevalence Multiple-species infection Prevention and control measures

An Ultra‑Durable Windmill‑Like Hybrid Nanogenerator for Steady and Efficient Harvesting of Low‑Speed Wind Energy

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2020年第12期12卷 228-238页

作者： Ying Zhang Qixuan Zeng Yan Wu jun Wu Songlei yuan Dujuan tan Chenguo Hu Xue Wang Department of Applied Physics State Key Laboratory of Power Transmission Equipment and System Security and New TechnologyChongqing UniversityChongqing 400044People’s Republic of China Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials Chongqing UniversityChongqing 400044People’s Republic of China

Wind energy is one of the most promising and renewable energy sources;however,owing to the limitations of device structures,collecting low-speed wind energy by triboelectric nanogenerators(TENGs)is still a huge *** solve this problem,an ultra-durable and highly efficient windmill-like hybrid nanogenerator(W-HNG)is ***,the W-HNG composes coupled TENG and electromagnetic generator(EMG)and adopts a rotational contact-separation *** unique design efficiently avoids the wear of friction materials and ensures a prolonged service ***,the generator group is separated from the wind-driven part,which successfully prevents rotation resistance induced by the friction between rotor and stator in the conventional structures,and realizes low-speed wind energy ***,the output characteristics of TENG can be complementary to the different performance advantages of EMG to achieve a satisfactory power *** device is successfully driven when the wind speed is 1.8 m s−1,and the output power of TENG and EMG can achieve 0.95 and 3.7 mW,*** power management,the W-HNG has been successfully applied as a power source for electronic *** work provides a simple,reliable,and durable device for improved performance toward large-scale low-speed breeze energy harvesting.

关键词： Triboelectric nanogenerator Windmill-like structure Rotational contact-separation mode Low-speed wind energy harvesting