Constructing Electron Microscope Labs: Challenges and Solutions

The construction of advanced laboratories for precision instruments, such as electron microscopes, involves unique challenges that are influenced by the specific environmental conditions required for optimal functionality. These include mitigating interference from magnetic fields and vibrations, which are critical for maintaining the precision and accuracy of the instruments used. This study aims to offer enhanced project management strategies and detailed construction solutions that address the environmental and technical needs specific to electron microscopy labs, thereby facilitating effective lab operations and extending the lifecycle of high-end precision instruments. Case studies of existing laboratory constructions, onsite investigations, and comprehensive reviews of the technical and environmental requirements provide the basis for a best practice for constructing sophisticated electron microscopy labs. The approach integrates both pre-construction planning and post-construction adjustments to create optimal operational environments. The findings suggest that successful lab constructions are those that incorporate thorough onsite assessments, strategic location choices, and the use of advanced construction materials and techniques specifically designed to counteract environmental challenges like magnetic and vibration interferences. Actionable guidelines for both planning and executing the construction of electron microscope labs highlighted in this tutorial are intended as an important resource to troubleshoot or upgrade existing lab facilities and to consult in preparation of future lab construction projects.

生物接触氧化-潜流型人工湿地组合工艺处理农村生活污水的应用案例研究

以浙江省永康市某农村的生活污水处理及灌溉回用工程为例,对“生物接触氧化-潜流人工湿地”组合工艺处理农村生活污水的设计参数、运行效果和工程效益等进行了分析。该工程设计规模为30 m^(3)/d,研究期间实际处理规模12~20 m^(3)/d,出水中TP、NH_(3)-N、COD、BOD5、SS、粪大肠菌群等11项主要指标灌溉期(4月至10月)满足《农田灌溉水质标准》,作为该村苗木基地灌溉用水,非灌溉期(11月至次年3月)出水满足《浙江省农村生活污水处理设施水污染物排放标准》,作为该村荷花种植塘的用水。工程运行期间对TP、NH_(3)-N、COD、BOD_(5)、粪大肠菌群、阴离子表面活性剂、色度、SS和浊度的平均去除率分别为44.3%、65.3%、63.8%、61.7%、76.2%、65.7%、74.2%、54.3%和50.5%。

Review of Studies on There in There-be Construction

There have been heated discussions onthere-be construction in the field of linguistics,and linguists have made numerous attempts to explore it in syntax,semantics,and pragmatics.However,researchers have not reached any consensus.There is a review of the mainstream of the studies to explore what can be done to promote unanimity.

Curriculum Ideological and Political Teaching and Practice of Study Tour Course Design in Higher Vocational Colleges: A Case Study of Qingdao Preschool Education College

Curriculum ideology and politics are critical for colleges and universities to fulfill theirfundamental mission of fostering moral and intellectual development. Within this framework, professionalcourses serve as the primary vehicles for integrating ideological and political education. Specifically, inthe field of study tours, the Study Tour Course Design emerges as a pivotal component for actualizingthe educational objectives of such programs. To construct a robust ideological and political curriculum,it is essential to devise a comprehensive system that aligns with professional teaching standards, industrybenchmarks, and vocational skill requirements. This involves a thorough exploration of ideologicaland political elements within the curriculum, ensuring their seamless integration throughout the coursedevelopment process.

Serum tumor markers (carcinoembryonic antigen, carbohydrate antigen 19-9, carbohydrate antigen 72-4, carbohydrate antigen 24-2, ferritin) and gastric cancer prognosis correlation

BACKGROUND Gastric cancer is a kind of malignant tumor which is prevalent all over the world.Although some progress has been made in the treatment of gastric cancer,its prognosis is still not optimistic,so it is of great significance to find reliable prog-nostic indicators to guide the treatment and management of patients with gastric cancer.AIM To explore the relationship between serum levels of five biomarkers[carcinoem-bryonic antigen(CEA),carbohydrate antigen(CA)19-9,CA72-4,CA24-2,and ferritin]and prognosis in patients with gastric cancer.METHODS This study included 200 patients with gastric adenocarcinoma,and conducted an in-depth analysis of their baseline characteristics,relationship between tumor markers and staging,and prognosis.The study found that CA19-9 has a signi-ficant correlation with tumor stage,the average levels of CA24-2,CEA,CA72-4 and ferritin were slightly increased disregarding the stage of tumor.Survival analysis showed that increases in CEA,CA19-9,CA24-2,and ferritin were all associated with shortened overall survival of patients.Further multivariate ana-lysis revealed that elevated serum CA72-4 levels were an inde-pendent adverse prognostic factor.RESULTS This study reveals that there is a significant correlation between the expression levels of serum tumor markers CEA,CA19-9,CA72-4,CA24-2 and ferritin in patients with gastric cancer and prognosis,and can be used as important indicators for prognostic evaluation of gastric cancer.In particular,markers that appear abnormally elevated initially may help identify gastric cancer patients with poor prognosis.CONCLUSION Serum CEA and CA19-9 play an important role in the prognosis assessment of gastric cancer,and are effective tools to guide clinical practice and optimize individualized treatment strategies for gastric cancer patients.

Studies on the Construction Parameter of an Artificial Occluded Cell for In-situ Inspection of the Propagation Rate of Localized Corrosion

An artificial localized corrosion system is assembled and some parameters related to the localized corrosion in active dissolution state (i.e., non-passive state) have been studied. The results showed that the developed electrochemical system can satisfactorily imitate a naturally formed localized corrosion and the coupling current can indicate the maximum localized propagating rate. In this artificial system, the anodic dissolution reaction followed the auto-catalytic mechanism. The localized corrosion current density was dependent on the area ratio R of the cathode to the occluded anode. While R was equal to or more than 6, the coupling current reached at a maximum value and did not alter with the increase in R-value. Therefore, R=7 is chosen as one of these optimum parameters used in constructing the system, with which the biggest galvanic current might be obtained. In contrast, the thickness of the polymer filler separating the occluded anode area from the bulk electrolyte solution and the volume of the occluded anode area did not affect the corrosion current obviously. They might affect the response time to approach a steady state.

Constructing a Management System for Private Colleges and Universities in China Based on a Comparative Study of Private Colleges and Universities at Home and Abroad

This paper first conducts a comparative study of the management system of private colleges and universities at home and abroad,then analyzes the reference significance of the management system of foreign private colleges and universities for the development of private colleges and universities in China,and finally puts forward corresponding strategies for the construction of a management system for private colleges and universities,so as to effectively promote the rapid development of private colleges and universities in China.At the same time,a smooth-running of private higher education is directly related to national development and the future of the nation.Private colleges and universities shoulder the sacred mission of educating people for the party and the country.Carrying out the party’s national work in the new era is the internal requirement of comprehensively implementing the party’s educational policy,the fundamental task of building morality and cultivating people,the mission of the era of developing schools and strengthening the country,as well as achieving satisfactory education.This helps to improve the socialist education system in China.

杨时孝廉精神在乡村文化建设中的时代价值及实现途径--以福建将乐县为例

孝廉精神是乡村文化建设的重要内容,宋代杨时,作为“程氏正宗”“闽学鼻祖”,他的孝风廉行基因深厚,并随着时代发展不断发挥积极作用。杨时孝廉精神在乡村建设中的价值和实践途径,已成为闽学研究的一个新领域和重要内容,在涵养乡村文化建设,提升村民素质上起着积极的作用。该文简要阐述了杨时孝廉精神的主要内容,重点论述了杨时孝廉精神如何结合新时代发展的需求,通过多维融合宣传内涵、打造全域实践阵地、扩充志愿服务队伍、实现文化产业转化等多个途径,推动闽学杨时孝廉精神的挖掘、传承,推动乡村文化建设的健康快速发展。

城区内新建高速铁路桥下空间利用改造方案研究--以广湛高铁佛山南海段为例

目前,高铁建设形成“脏、乱、差”的桥下“灰色”空间亟须进行科学合理的规划利用,为城市提供更多的公共空间资源。佛山市南海区境内高铁、城际铁路累计达227 km,以占地及其安全保护范围30 m计算,其桥下空间涉及土地面积高达6.81 km2。文章通过对新建广州至湛江高速铁路桥下空间利用改造方案的探索研究,以广湛高铁建设为契机,结合征地拆迁、“三旧”改造及生态宜居美丽乡村建设等重点工作的需要及内容,为沿线用地空间整合,探索城乡空间融合发展途径,实现自然生态入城、配套设施下乡。

An Observational Study of the 30-50 Day Atmospheric Oscillations Part I: Structure and Propagation

Features of structure and propagation of the 30 to SO day atmospheric oscillations are investigated using the ECMWF analysis of 1980-1983. Evidence is provided to confirm the characteristics of the oscillation in the equatorial region. Those in the mid-high latitudes, however, are revealed to be very different from the tropics and pose a strong barotropic structure. Horizontal coherence shows teleconnection patterns which can be identified as EAP and PNA. The wind field of the specified time scale of the oscillation appears as long-lived vortices and vortex pairs. Mid-latitude perturbations propagate clearly westwards, especially during the winter season. In the high latitudes, they propagate westwards in the winter but eastwards in the summer. Meridional propagations are rather different from region to region.

行动学习如何构建大学生的创新能力?--基于《创新创业实训》课程的质性案例研究

在“大众创业、万众创新”政策和全面推进“新文科”建设的背景下,创新型人才的开发与培养成为提升国家核心竞争力的基础支撑。高校作为培养创新型人才的重要阵地,积极推进创新创业教育意义重大。在研究和借鉴行动学习基本理论的基础上,以《创新创业实训》课程为例,将行动学习法嵌入课程教学,通过收集与学生的半结构化访谈数据,研究行动学习对大学生创新能力构建的过程和作用机制,以探索高等教育课堂教学模式、教学方法的改革,促进高校大学生创新能力提升,培养高质量创新型人才。

Potential Toxicological and Cardiopulmonary Effects of PM2,5 Exposure and Related Mortality:Findings of Recent Studies Published during 2003-2013

Air pollution has environmental issue owing become a serious to its diverse harmful effects on the physical and biological environment. According to the Environmental Protection Agency （EPA） and the World Health Organization （WHO）, air pollution affects millions of people worldwide. Hundreds of thousands of deaths each year and a range of diseases, particularly among vulnerable groups （i.e., children, the elderly, and people with special medical conditions）, are attributed to air pollution. These effects are not always caused by single pollutant in the air; rather, they are considered consequences of the multi-pollutants to which people are simultaneously exposed.

Numerical study on three-dimensional flow field of continuously rotating detonation in a toroidal chamber

Gaseous detonation propagating in a toroidal chamber was numerically studied for hydrogen/oxygen/nitrogen mixtures. The numerical method used is based on the three-dimensional Euler equations with detailed finiterate chemistry. The results show that the calculated streak picture is in qualitative agreement with the picture recorded by a high speed streak camera from published literature. The three-dimensional flow field induced by a continuously rotating detonation was visualized and distinctive features of the rotating detonations were clearly depicted. Owing to the unconfined character of detonation wavelet, a deficit of detonation parameters was observed. Due to the effects of wall geometries, the strength of the outside detonation front is stronger than that of the inside portion. The detonation thus propagates with a constant circular velocity. Numerical simulation also shows three-dimensional rotating detonation structures, which display specific feature of the detonation- shock combined wave. Discrete burning gas pockets are formed due to instability of the discontinuity. It is believed that the present study could give an insight into the interest- ing properties of the continuously rotating detonation, and is thus beneficial to the design of continuous detonation propulsion systems.

An Observational Study of the 30-50 Day Atmospheric Oscillations Part II: Temporal Evolution and Hemispheric Interaction across the Equator

In this part, the temporal evolution and interaction across the equator of 30-50 day oscillation in the atmosphere are investigated further. The annual variation of 30-50 day oscillation is quite obvious in the mid-high latitudes. In the tropical atmosphere, the obvious interannual variation is an important property for temporal evolution of 30-50 day oscillation. The low-frequency wavetrain across the equator over the central Pacific and central Atlantic area, the movement of the long-lived low-frequency system across the equator and the meridional wind component across the equator will obviously show the interaction of 30-50 day oscillation in the atmosphere across the equator.

Experimental Study on Momentum Transfer of Surface Texture in Taylor-Couette Flow

The behavior of Taylor-Couette （TC） flow has been extensively studied. However, no suitable torque prediction models exist for high-capacity fluid machinery. The Eckhardt-Grossmann-Lohse （EGL） theory, derived based on the Navier-Stokes equations, is proposed to model torque behavior. This are the significant energy theory suggests that surfaces transfer interfaces between cylinders and annular flow. This study mainly focuses on the effects of surface texture on momentum transfer behavior through global torque measurement. First, a power-law torque behavior model is built to reveal the relationship between dimensionless torque and the Taylor number based on the EGL theory. Second, TC flow appa- ratus is designed and built based on the CNC machine tool to verify the torque behavior model. Third, four surface texture films are tested to check the effects of surface texture on momentum transfer. A stereo microscope and three-dimensional topography instrument are employed to analyze surface morphology. Global torque behavior is measured by rotating a multi component dynamometer, and the effects of surface texture on the annular flow behavior are observed via images obtained using a high-speed camera. Finally, torque behaviors under four differentsurface conditions are fitted and compared. The experi- mental results indicate that surface textures have a remarkable influence on torque behavior, and that the peak roughness of surface texture enhances the momentum transfer by strengthening the fluctuation in the TC flow.

STUDIES ON STEROIDAL PLANT GROWTH REGULATOR 24. STEREOCONTROLLED CONSTRUCTION OF THE SIDE CHAIN OF BRASSINOLIDE AND HOMOBRASSINOLIDE VIA A TANDEM VICINAL DIALKYLATION OF PYRANONE MOIETY

A stereocontrolled construction of the side chain of brassinclide and homobrassinolide has been achieved via the tandem vicinal dialkylation of the pyranone moiety as a key step.

On the Construction of Deepening Anti - corruption Mechanism

It needs the foundation of system and the guarantee of organizational system for anti-corruption,but it is more necessary to build and form an effective anti-corruption mechanism,so that the anti-corruption can be really put into practice. Anti-corruption mechanism refers to a organic operation system of the interaction,interconnection and constraint between the constituent elements( parts) and elements of national anti-corruption,and as a system,anti-corruption mechanism should have the characteristics of system aticness,comprehensiveness,transparency,legalization,public participation,scientific dynam ic,and internationalism. The construction of deepening anti-corruption mechanism is the need for reconstructing the ruling legitimacy of the party and the governm ent. Adhering to the principle of treating both root causes and symptoms is necessary in the construction of anti-corruption m echanism,com bating and punishing corruption is an important part of anti-corruption,and the prevention and control of corruption is the basic project of anti-corruption. Therefore,the construction of prevention and control mechanism in the anti-corruption mechanism has a more far-reaching significance.

Preparation and spectroscopic, and thermal decomposition kinetic studies of europium(Ⅲ) complex [Eu(HNBD)_3] (HNBD: 1-(6-hydroxy-1-naphthyl)-1,3-butanedione)

The complex of Eu（IH） with 1-（6-hydroxy- 1-naphthyl）- 1,3-butanedione （HNBD） was prepared for the first time and characterized by elemental analysis, IR, UV, fluorescence spectrum, and DTA-TG-DTG techniques. The IR and UV-visible spectra showed that Eu（Ⅲ） ion was coordinated to the HNBD ligand. The fluorescence spectrum showed the presence of Eu^3＋ characteristic emission. The TG-DTA-DTG curves showed that the thermal decomposition of the anhydrous complex was a two-stage process and the final residue was Eu2O3. The thermal decomposition kinetic parameters of the complex were evaluated from TG-DTG data by using three kinds of integral methods （Coat-Redfem equation, Horowitz and Metzger equation, Madhusudanan-Krishnan-Ninan equation）. The kinetic parameters of the first stage are E^＊ = 164.02 kJ.moll, A = 1.31 × 10^15 s^-l, AS^＊= 42.27 J·K^-l·mol^-l, △H^＊ = 159.51 kJ·mol^-l, △G^＊= 136.54 kJ·mol^-l, and n = 3.1, those of the second stage are E^＊= 128.52 kJ·mol^-l, A = 1.44× 106 s^-1, △S^＊= - 136.89 J·K^-l·mol^-l, △H^＊ = 120.41 kJ·mol^-l, △G^＊= 283.85 kJ·mol^-l, and n = 1.1.

Assessment Study on Construction Quality Project of China Local Undergraduate Specialty

This paper focuses on the assessment of college Specialty Construction Project quality. On the basis of conducting researches and analysises of Specialty Construction Practice, the anther selected projects indicators of construction content with high frequency as evaluation index constituent connotation, referring to professional evaluation index system of provincial brand, and defended the issue that there will be no characteristic projects of specialty evaluate; formed the basic architecture of local colleges specialty evaluation index system, clearing grading assessment model, making debate analysis on its value orientation; and confirmed that the Ministry of Education is the main project, the university is the main building, and the provincial education administrative departments or the third party certification is the assessment mainbody, in this way to constitute the innovation management mode of Specialty Construction.