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Characteristic and optimization of ferrite-rich sulfoaluminate-based composite cement suitable for cold region tunnels

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Journal of Central South University 2024年第8期31卷 2794-2809页

作者： Peng, You Li, Li Tan, Xian-jun Qiu, Xin Zheng, Pei-chao Xie, Jun Chen, Wei-zhong Reziwanguli, Sha-ta-er School of Infrastructure Engineering Dalian University of Technology Dalian China Institute of Rock and Soil Mechanics Chinese Academy of Sciences Wuhan China Xinjiang Academy of Transportation Sciences Co. Ltd. Urumqi China

To develop suitable grouting materials for water conveyance tunnels in cold regions, firstly, this study investigated the performance evolution of ferrite-rich sulfoaluminate-based composite cement (FSAC grouting material) at 20 and 3 °C. The results show that low temperature only delays the strength development of FSAC grouting material within the first 3 d. Then, the effect of four typical early strength synergists on the early properties of FSAC grouting material was evaluated to optimize the early (≤1 d) strength at 3 °C. The most effective synergist, Ca(HCOO)2, which enhances the low-temperature early strength without compromising fluidity was selected based on strength and fluidity tests. Its micro-mechanism was analyzed by XRD, TG, and SEM methods. The results reveal that the most suitable dosage range is 0.3 wt%–0.5 wt%. Proper addition of Ca(HCOO)2 changed the crystal morphology of the hydration products, decreased the pore size and formed more compact hydration products by interlocking and overlapping. However, excessive addition of Ca(HCOO)2 inhibited the hydration reaction, resulting in a simple and loose structure of the hydration products. The research results have reference value for controlling surrounding rock deformation and preventing water and mud inrushes during the excavation in cold region tunnels.

关键词： ferrite-rich sulfoaluminate cement cold zone early strength synergist mechanical property micro-structure pumped storage power

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The Economics of Competing Water Uses under a FerC Licensing Agreement: Estimation of Property Value, Recreation, and Hydroelectric Impacts

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Journal of Water Resource and Protection 2024年第6期16卷 414-428页

作者： matthew Bingham Jason Kinnell Veritas Economics Cary USA

Reservoirs provide a variety of services with economic values across multiple sectors. As demands for reservoir services continue to grow and precipitation patterns evolve, it becomes ever more important to consider the integrated suite of values and tradeoffs that attend changes in water uses and availability. Section 316 (b) of the Clean Water Act requires that owners of certain water cooled power plants evaluate technologies and operational measures that can reduce their impacts to aquatic organisms. The studies must discuss the social costs and benefits of alternative technologies including cooling towers (79 Fed. Reg. 158, 48300 - 48439). Cooling towers achieve their effect through evaporation. This manuscript estimates the property value, recreation, and hydroelectric generation impacts that could result from the evaporative water loss associated with installing cooling towers at the McGuire Nuclear Generating Station (McGuire) located on Lake Norman, North Carolina. Although this study specifically evaluates the effects of evaporative water loss from cooling towers, its methods are applicable to estimating the economic benefits and costs of a new water user or reduced water input in any complex reservoir system that supports steam electric generation, hydroelectric generation, residential properties, recreation, irrigation, and municipal water use.

关键词： Property Value FerC Hydroelectric Recreation Water Levels

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A review of complications after ureteral reconstruction

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Asian Journal of Urology 2024年第3期11卷 348-356页

作者： Jonathan Rosenfeld Devin Boehm Aidan Raikar Devyn Coskey matthew Lee Emily Ji Ziho Lee Department of Urology Northwestern UniversityFeinberg School of MedicineChicagoILUSA Department of Urology Temple UniversityLewis Katz School of MedicinePhiladelphiaPAUSA

Objective:This study aimed to provide a comprehensive overview of the complications unique to ureteral reconstruction in adults,emphasizing their presentation,diagnosis,and management in the treatment of ureteral structure ***:This review involves an in-depth analysis of existing literature and case studies pertaining to ureteral reconstruction,with a focus on examining the range of complications that can arise *** attention is given to the presentation of each complication,the diagnostic process involved,and the subsequent management ***:Ureteral reconstruction can treat ureteral stricture disease with low morbidity;however,complications,although uncommon,can have severe *** most notable complications include urinary extravasation,stricture recurrence,urinary tract infections,compartment syndrome,symptomatic vesicoureteral reflux,and Boari flap *** complication presents unique diagnostic challenges and requires specific management ***:Ureteral reconstruction is a highly effective treatment for ureteral stricture *** a strong understanding of the potential complications that patients may experience following ureteral reconstruction is not only critical to adequately counsel patients but also facilitate prompt diagnosis and management of complications when they arise.

关键词： Ureteral reconstruction Postoperative complication Urinary extravasation Stricturerecurrence Urinary tract infection

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Clear Cell Pleomorphic Dermal Sarcoma: A Case Report and Literature Review

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Open Journal of Pathology 2024年第2期14卷 25-30页

作者： Jeongeun Do matthew Purdom Department of Pathology and Laboratory Medicine University of Kentucky Lexington KY USA Department of Pathology and Laboratory Medicine VA Lexington Health Care System Lexington KY USA

Introduction: Atypical fibroxanthoma (AFX) and pleomorphic dermal sarcoma (PDS) are one spectrum of rare cutaneous neoplasms that typically arise in sun-exposed skin of older population. AFX/PDS is essentially diagnosis of exclusion requiring Immunohistochemical work-up to exclude other types of tumors. Case Report: We present a case involving an ulcerated solitary lesion on the scalp of an elderly man. Histological examination revealed that the dermal tumor was composed of large pleomorphic, epithelioid, and spindle cells with clear cytoplasm. These cells were negative for cytokeratins, melanocytes and smooth muscle markers, but positive for CD10. These findings are consistent with a diagnosis of clear cell (CC) PDS. Conclusion: PDS is a low-grade malignancy that can recur locally and metastasize, which is distinguished from AFX by its larger size and the presence of aggressive histopathologic features including deeper invasion into the subcutaneous tissue, tumor necrosis, and lymphovascular and/or perineural involvement. Among several histopathologic variants, the CC variant is extremely rare with only two cases of PDS reported in the literature to date.

关键词： Atypical Fibroxanthoma Pleomorphic Dermal Sarcoma Clear Cell Variant

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An Effective Optimization Algorithm for Ant Colony Vehicular Congestion Management

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Journal of Computer and Communications 2024年第9期12卷 119-130页

作者： Tebepah Tariuge Timadi matthew Department of Computer Science Ignatius Ajuru University Port Harcourt Nigeria Department of Computer Science Federal University Yenagoa Nigeria

Adaptability and dynamicity are special properties of social insects derived from the decentralized behavior of the insects. Authors have come up with designs for software solution that can regulate traffic congestion in a network transportation environment. The effectiveness of various researches on traffic management has been verified through appropriate metrics. Most of the traffic management systems are centered on using sensors, visual monitoring and neural networks to check for available parking space with the aim of informing drivers beforehand to prevent traffic congestion. There has been limited research on solving ongoing traffic congestion in congestion prone areas like car park with any of the common methods mentioned. This study focus however is on a motor park, as a highly congested area when it comes to traffic. The car park has two entrance gate and three exit gates which is divided into three Isle of parking lot where cars can park. An ant colony optimization algorithm (ACO) was developed as an effective management system for controlling navigation and vehicular traffic congestion problems when cars exit a motor park. The ACO based on the nature and movement of the natural ants, simulates the movement of cars out of the car park through their nearest choice exit. A car park simulation was also used for the mathematical computation of the pheromone. The system was implemented using SIMD because of its dual parallelization ability. The result showed about 95% increase on the number of vehicles that left the motor park in one second. A clear indication that pheromones are large determinants of the shortest route to take as cars followed the closest exit to them. Future researchers may consider monitoring a centralized tally system for cars coming into the park through a censored gate being.

关键词： Ant Colony Optimization Adaptability Congestion Pheromones

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Influence of Lightning Disaster on Cities and Lightning Defense Measures

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Meteorological and Environmental Research 2024年第3期15卷 65-67页

作者： Pei WANG Tao ZHANG tengge'er WU Xiangjun ZHANG Ulanqab Meteorological Bureau Ulanqab 012000China Huade Meteorological Bureau Ulanqab 013350China Xilinhot Meteorological Bureau Xilinhot 026000China

Under the influence of special terrain and climatic conditions,lightning weather in Ulanqab City is more frequent from June to August,and lightning disaster has become one of the important tasks of disaster prevention and *** this paper,based on the characteristics of lightning weather in Ulanqab City,the impact of lightning disaster on the city was analyzed,and lightning protection measures,such as strengthening supervision of lightning protection safety,establishing a long-term lightning protection mechanism,doing a good job in lightning protection construction and detection in key places,and further improving public awareness of lightning protection,were put forward to reduce and avoid urban lightning disasters as much as possible and ensure urban safety.

关键词： Lightning characteristics Disaster impact City Lightning protection measures

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Apples to oranges:environmentally derived,dynamic regulation of serotonin neuron subpopulations in adulthood?

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Neural Regeneration Research 2025年第09期 2596-2597页

作者： Christopher J.O'Connell matthew J.Robson Department of Genetics College of Medicine Harvard University James L. Winkle College of Pharmacy Division of Pharmaceutical SciencesUniversity of Cincinnati Neuroscience Graduate Program College of MedicineUniversity of Cincinnati

Traumatic brain injury(TBI) is a public health problem with an undue economic burden that impacts nearly every age,ethnic,and gender group across the globe(Capizzi et al.,2020).TBIs are often sustained during a dynamic range of exposures to energetic environmental forces and as such outcomes are typically heterogeneous regarding severity and pathology(Capizzi et al.,2020).

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试论中国大运河世界遗产的系列扩展

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东南文化 2024年第2期 15-24页

作者：李尔吾西北大学文化遗产学院陕西西安710119

中国大运河世界遗产符合世界文化遗产中的遗产运河、文化景观、文化线路类型。中国大运河基于工程技术类线形遗产的扩展应完善水工遗存的系列完整性并扩大遗产时空范围;基于文化景观的扩展应将沿线展现人们生产生活的各种景观组成大运... 详细信息

中国大运河世界遗产符合世界文化遗产中的遗产运河、文化景观、文化线路类型。中国大运河基于工程技术类线形遗产的扩展应完善水工遗存的系列完整性并扩大遗产时空范围;基于文化景观的扩展应将沿线展现人们生产生活的各种景观组成大运河文化景观群;基于文化线路的扩展应构建大运河水陆遗产综合体,并强调运河与城镇、城镇与城镇间的动态演化关系。

关键词：中国大运河世界遗产系列扩展遗产运河文化景观文化线路价值特征文化价值

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Unlocking the sun’s potential:Vitamin D’s role in battling colorectal cancer

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Journal of Nutritional Oncology 2024年第1期9卷 1-9页

作者： Qing-er Ling Si-Qi Ni Yi Jiao Ling-Xiang Liu Department of Oncology Jiangsu Province HospitalNanjing 210000JiangsuChina

Vitamin D,a fat-soluble hormone precursor primarily derived from sunlight exposure,exerts pleiotropic effects within the body,including anticancer *** has demonstrated an association between vitamin D and colorectal cancer(CRC)from both geoecological and epidemiological perspectives,wherein vitamin D intake and circulating levels have clinical significance for the development of CRC and confer a protective effect against the *** such,a sensible increase in sunlight exposure may be an accessible approach to reducing cancer risk and a low-cost treatment when used in conjunction with vitamin D *** article comprehensively explores the established and emerging mechanisms thought to underlie the impact of vitamin D on *** encompasses recent insights from clinical trials and epidemiological studies,along with recommendations,diverse viewpoints,and future prospects regarding the utilization of vitamin D in the management of CRC.

关键词： Colorectal cancer Vitamin D Calcitriol

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Gentiana macrophylla Pall.:a review of the basic source,traditional use,chemical components,pharmacological activities and quality control

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Traditional Medicine Research 2024年第12期9卷 13-30页

作者： Qi-er Mu Yi-Sa A Yan-Qiu Bai Chu-La Sa College of Mongolian Medicine Inner Mongolian Medical UniversityJinshan Economic and Technological Development ZoneTumote Left BannerHohhot 010110China

Gentiana macrophylla Pall.(***),whose genus and family belong to the Gentianaceae and *** main distribution centers of *** resources were the Loess Plateau and the eastern Qinghai-Tibet Plateau in ***,as a traditional medicine,has a long history and was used in different ethnic *** roots were used in traditional Chinese medicine,which had the effect of anti-inflammatory,anti-rheumatism,antiviral,promote blood circulation,eliminate swelling and pain,while its flowers were used in traditional Mongolian medicine,which had the effect of removing“Xieriwusu”(“Xieriwusu”means rheumatism),antiviral,reducing *** previous studies,it could be found that there were more than forty components isolated and identified from *** main chemical components were iridoids,flavonoids,triterpenoids,steroids,phenylpropanoids,and *** terpenoid components represented by gentiopicroside and Loganic acid were the main components of the root of ***,which had anti-inflammatory,antioxidant,hepatoprotective,analgesic,antibacterial and promote gastrointestinal tract *** flower mainly contains isoorientin and isovitexin as the representative of *** have anti-tumor,liver protection,heart protection,inhibition of acetylcholinesterase and inhibition of *** could be seen from previous studies that the research on *** was mainly focused on the root,and the flower was rarely *** was reported that the experimental data of the anti-inflammatory and anti-tumor effects of *** flowers show that its curative effect was very ***,the flowers of the flower of *** can be used as potential medicinal parts for *** that flavonoids are mostly found in flowers and exhibit a range of functions,it is possible to investigate the flowers in order to learn more about ***’s potential medical *** on botanical books,Chi

关键词： Gentiana macrophylla Pall. basic source chemical component pharmacological activity quality control

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