关于丽江机场场区地质条件及地基处理的问题探讨

本文根据丽江机场岩土工程勘察工作,介绍了场区地形地貌、地层岩性、岩土性状及水文地质条件。着重探讨几个主要工程地质问题,所得结果为机场建设提供了技术依据,并为结合本地区地质条件、工程条件、经济因素以及施工、监理水平等进行地基处理方案。     

浅析软土地基处理方法

本文介绍了地基处理的目的,地基处理常用技术的加固机理、以某高速公路设计为实例阐述了各种地基处理方法,井给出深厚层软基处理常用方法,处理周期等.     

浅析软土地基处理方法

本文介绍了地基处理的目的,地基处理常用技术的加固机理、以某高速公路设计为实例阐述了各种地基处理方法,井给出深厚层软基处理常用方法,处理周期等。     

高层建筑基础施工及地基处理技术现状和发展趋势探讨

在对我国的建筑行情进行了细致的分析,对地质情况做了全面的调查,在经过一系列的总结与归纳中,总结了一下对高层建筑的一些特点,对高层建筑物地基处理提出了一些细节的见解,希望可以起到用处!     

探讨高层建筑地基处理

近年来,随着经济的高速发展,高层建筑已经成为了城市建设的主要内容,而高层建筑的地基的建设作为高层建筑工程的质量保障,已经受到了人们的广泛关注.本文首先简单介绍了地基的概念,其次介绍了灰土垫层法、灰土挤密桩法、素混凝土桩法、强夯法以及加固法等高层建筑的地基处理技术,最后介绍了高层建筑地基处理过程中容易出现的问题以及处理措施.     

建筑工程中人工地基常用处理方法探讨

本文通过分析各种建筑工程中常用的人工地基处理方法,对各种地基处理方法的原理和适用条件作了详细的介绍,并阐述了不同地基的处理方式对地基的实际加固作用和效果,为实际建筑工程地基施工提供了实用的参考资料。     

软弱地基处理方法

在工程实践中经常遇到软弱地基,必须考虑其强度和变形问题,采取相应的措施对软弱地基进行处理,以提高其强度和稳定性,减少基础沉降和不均匀沉降。本文结合工程实践,针对目前常用的软弱地基处理方法进行了浅要的探讨。     

探讨公路路桥施工中软土地基处理的方法

目前,在公路路桥的施工过程中,较为突出的问题就是软土地基的施工及处理,因此,针对公路路桥施工中的软土基础处理问题,本文将对软土地基在公路路桥施工中的危害影响及处理方法进行阐述。     

浅析公路软土地基的处理方法

软土地基处理作为公路工程施工中的常见内容,需结合相关特征和施工特点,通过综合考虑制定科学、合理的软土地基处理方案,才能确保施工质量的提高。     

地基处理技术和方法探究

地基处理是建筑工程行业中非常重要的环节,尤其是随着我国经济社会的快速发展,建筑工程行业也有了跨越式的发展。在不同地域的建筑工程施工过程中,地基处理也因施工环境的差别采用不同的技术,尤其是在不同种类的软土地区,对地基处理也有着不同的要求。本文通过对地基处理的原理分析,探究当前建筑工程领域的地基处理新技术和方法。     

基于LabVIEW的储液罐状态监控系统设计

利用LabVIEW201 5虚拟仪器软件开发平台,以计算机、 USB-4716数据采集卡、传感器和信号调理电路作为硬件平台,设计了一个储液罐状态监控系统,实现对储液罐中液体的液位、温度、压力的实时监测和液位的PID控制功能。     

高校图书馆智库建设方法初探

在中国特色新型智库的大形势下,智库不仅仅是推进国家治理体系和治理能力现代化的重要力量,也是推进高等教育的重要推力。高校图书馆是文化传播交流的中心,高校图书馆在潜移默化地参与智库服务之中,智库服务也已成为图书馆馆员的新型服务能力,本文从高校图书馆智库的基础建设、服务、人才等方面,初步探讨高校图书馆智库的建设方法,从而提升高校图书馆的整体服务水平、服务层次以及馆员服务能力。     

牛肠阻塞的手术治疗

肠阻塞又称肠便秘、便秘疝,是家畜因肠机能紊乱,粪便积滞不能运转,而使肠腔发生完全或部分阻塞的一种急性腹痛症.本病主要发生在马骡,牛羊较少见.但在我省肠阻塞也是黄牛的常见病之一,一般情况多与日常饲养管理、使役及气候等因素有关.根据相关资料显示,肠便秘在家畜胃肠腹痛症中约占50%～60%,其中以小结肠阻塞、胃状膨大部阻塞、骨盆曲阻塞多见.笔者采用手术治疗,效果明显,现介绍如下供参考.     

The Effect of Knotting Method on the Structural Properties of Large Diameter Nonabsorbable Monofilament Sutures

OBJECTIVE: To evaluate the effect of knotting method on the mechanical properties of large diameter nonabsorbable monofilament suture materials. STUDY DESIGN: In vitro mechanical evaluation. METHODS: A conventional square knot was compared with the surgeon's knot, sliding half-hitch, and clamped square knot. Knotted suture loops were created in a uniform manner and acutely tensioned to failure (20 mm/min loading rate; n = 20 per knot type for each material). Stiffness, yield, and failure characteristics of USP #2 nylon, #2 polybutester, #2 polypropylene, 27 kg test monofilament nylon fishing line, and 27 kg nylon leader material were evaluated. RESULTS: Compared with a conventional square knot, a surgeon's knot decreased stiffness for #2 polypropylene, 27 kg fishing line, and 27 kg leader (P < .05). A sliding half-hitch weakened all materials except 27 kg leader (P < .05). Clamping the first throw of a square knot increased the stiffness of 27 kg leader loops (P < .05). CONCLUSIONS: Based on clinically relevant parameters (stiffness and yield), knotting method had no effect on #2 nylon and #2 polybutester. The surgeon's knot is not recommended for #2 polypropylene and 27 kg fishing line and leader material. A sliding half-hitch decreased the yield of leader material. Clamping the first throw of a square knot had no adverse effects on acute properties of tested materials; it increased the stiffness for leader material. CLINICAL RELEVANCE: Knotting method does influence the structural properties of suture materials and should be considered when tying knots under tension.     

Land Management History of Canadian Grasslands and the Impact on Soil Carbon Storage

Grasslands represent a large potential reservoir in storing carbon (C) in plant biomass and soil organic matter via C sequestration, but the potential greatly depends on how grasslands are managed, especially for livestock and wild animal grazing. Positive and negative grazing effects on soil organic carbon have been reported by various studies globally, but it is not known if Canadian grasslands function as a source or a sink for atmospheric C under current management practices. This article examines the effect of grassland management on carbon storage by compiling historical range management facts and measurements from multiple experiments. Results indicate that grazing on grasslands has contributed to a net C sink in the top 15-cm depth under current utilization regimes with a removal rate of CO₂ at 0.19 ±  Mg · C · ha^-1 · yr^-1 from the atmosphere during recent decades, and net C sequestration was estimated at 5.64 ±  Mg · C · ha^-1 on average. Naturalization of 2.3 M ha of previously cultivated grasslands in the 1930s has also led to C sequestration in the Canadian prairies but has likely abated as the pool has saturated. Efforts made by researchers, policymakers, and the public has successfully led to the restoration of the Canadian prairies to a healthier state and to achieve considerable C sequestration in soils since their severe deterioration in the 1930s. In-depth analysis of management, legislation, and agricultural programs is urgently needed to place the focus on maintaining range health and achieving more C storage in soils, particularly when facing the reduced potential for further C sequestration.     

沉性大卵径鱼卵的观察方法与虹鳟的胚胎发育

虹鳟等冷水性鱼类产沉性卵,由于卵膜较厚,不作特殊处理,肉眼无法直接观察其胚胎发育的过程。该研究分别采用0.6%~1.0%胰蛋白酶酶解透明、透明液处理和5%甲醛固定剥膜的方法对虹鳟的受精卵进行处理,在显微镜下比较3种处理方法并对虹鳟胚胎发育进行观察。结果表明,用胰蛋白酶适度处理以后,卵膜呈透明状态,可以用显微镜清楚的观察到各个发育时期;用透明液处理以后,卵膜仍然较厚,在发眼前期,仅可观察到胚胎的大致发育时期,发眼期以后,虽然可以观察到每一个发育时相,但效果较差;采用甲醛固定后卵膜及卵内物质变性,胚胎固化形态稳定,发育时相得以固定,机械去除卵膜以后,各发育时相清晰可见,进而可以深入研究其胚胎发育。通过对甲醛固定以后的胚胎观察,可以将虹鳟的胚胎发育分为囊胚期、原肠期、神经胚期、眼球色素出现期和循环期等21个时期。     

规模化牛场粪污的处理方法与技术

 
规模化牛场粪便、污水等废弃物排泄量大,污染严重,已经成为制约养牛生产可持续发展的主要因素。论文系统论述了规模化牛场粪污处理与利用的实用方法,希望对规模化牛场管理人员进行粪污处理工程规划设计时提供参考。     

Meta-analysis of the Effect of Treatment Strategies for Nephrosplenic Entrapment of the Large Colon

A variety of treatment strategies for nephrosplenic entrapment of the large colon are reported, with conflicting evidence in the published literature as to the preferred treatment option. The aim of this study is to provide a systematic meta-analytical assessment of the efficacy of different treatment strategies in horses with confirmed or suspected nephrosplenic entrapment. This study involves meta-analysis including nonrandomized studies. A comprehensive literature search was performed from January 1970 to January 2017. Inclusion criteria were retrospective studies involving horses with confirmed and suspected nephrosplenic entrapment. A meta-analysis was performed using a random effects model, with the effect size calculated as an odds ratio (OR) with 95% confidence intervals. Statistical significance was P < .05. Out of 84 peer reviewed publications that met the search criteria, 19 relevant studies were identified. Using an OR as the effect size, the meta-analysis noted that the choice of medical or surgical therapy had no statistically significant effect on survival (P = .134). Patients treated via the rolling technique were no more likely to resolve with medical management than those treated via jogging (P = .187). Patients treated with phenylephrine were no more likely to exhibit medical resolution than patients that did not receive phenylephrine, either when all medical treatment methods were considered (P = .290), or when rolling under general anesthesia was used (P = .331). Treatment strategy, including medical versus surgical therapy, does not affect the likelihood of resolution of nephrosplenic entrapment. However, the lack of randomized trials means the results should be treated with caution and case selection remains important..     

高效回收湿法磷酸尾气中氟的方法

湿法磷酸萃取槽尾气中夹带大量氟化物,高品质回收氟化物既有利于避免环境污染,还可以变废为宝。本方法使用清水作为文丘里洗涤器循环水,并定期对文丘里循环槽的含氟循环水进行过滤,降低固体物对引发管道堵塞和减少氟硅酸中杂质。文丘里洗涤器的尾气出口依次连接有三级洗涤塔,采用三级逆流洗涤方式,其中使用经除氟处理的循环水,水体中含氟量较低,有利于尾气中的氟充分洗除,以满足尾气达标排放的要求;该方法既回收高品质的氟硅酸溶液,充分利用氟资源,又避免氟排放污染环境,经济效益和社会效益显著。