安头水文站雷达水位计比测分析

本文通过对安头水文站雷达水位计与人工水位观测对比数据分析,验证了雷达水位计观测精度完全能满足该站水位观测的要求,为今后安头水文站实行水文自动化测报奠定了基础。

汾阳市安头村五神庙剧场考述

现存汾阳市安头村五神庙戏台重修于清末。整座戏台高大宽敞,观瞻雄伟,尽显豪华,在古风中透出浓郁的时代气息。五神庙剧场正是这个时代背景下完整保存下来的最具典型意义的实物证明,代表着清末汾州府剧场建设的辉煌,也是清末社会戏曲文化繁荣的真实写照,具有重要的文物和文化价值。

安头水文站水位～流量关系曲线合并定线分析

通过对安头水文站水位~流量关系进行合并定线,选取近5年水位、流量实测资料进行合并定线分析,采用前一年落水关系曲线定为本年度的涨水曲线,按照水位级布设测点,对合并定线后的误差进行统计分析,经过分析计算,合并定线误差满足水文测验规范要求,流量测验按水位级布点的可行性,作为安头水文站今后制订测次精简方案的依据,进一步优化水文测验方式起到一定的指导作用,节约大量的人力资源,为开展水文巡测提供技术支撑。

头痛安片对急性血瘀模型大鼠血液流变学的影响

目的:研究头痛安片对大鼠血液流变学的影响。方法:肾上腺素加冰水应激法建立急性血瘀模型。结果:头痛安组在高、中、低切变率下血液粘度、红细胞压积较血瘀模型组显著为低。结论:头痛安片剂能降低急性血瘀模型大鼠全血粘度、血浆粘度、全血还原粘度以及红细胞压积。

陕西省麟游县漆水河普化水库施工分期设计洪水计算

普化水库施工分期设计洪水计算以漆水河流域安头水文站为参证站,采用安头站1971年~2021年实测水文资料系列,绘制安头站历年逐月最大流量散布图,根据散布图及洪水季节变化情况,结合施工组织设计需要,合理划分施工分期时段。安头站分期设计洪水按连序系列计算经验频率,用矩法估算统计参数的初值,采用P-Ⅲ曲线型目估适线,采用水文比拟法将安头站分期设计洪水计算成果推算至普化水库坝址断面处,得到坝址处分期设计洪水成果。

大型低速柴油机十字头销事故分析

船用大型低速柴油机十字头销是很重要的运动部件，由于其润滑条件恶劣，所以容易发生事故。根据统计，十几年来天津远洋运输公司13条船的主机十字头销发生过事故，占全部大型低速柴油机船的13％左右。这不但威胁着船舶的安全，而且在经济也给公司带来很大损失。为此，怎样避免或减少事故的发生，就成了我们轮机管理人员努力研究的课题之一。天远出现十字头销事故的船舶主机大部分是我亲自主持修理的，现把这方面的实践经验加以总结，以供有关人员参考。

圭峰寺

圭峰寺始建于隋朝,座落在繁峙县岩头乡安头村的凤凰山中。寺庙虽然规模不大,但由于历史悠久,风景秀丽,所以闻名遐迩。 (一) 山峰峻峭的凤凰山位于气势雄伟、峰峦叠嶂的五台山西部,它象一只跃跃欲飞的凤凰,翘尾挺胸,双翅舒展,山中的竖石侧柏恰似凤凰身上的羽毛,斑驳绚丽。凤凰山的总面积不过三平方公里,它处在地质断层中。

A 3-D DDA damage analysis of brick masonry buildings under the impact of boulders in mountainous areas

In mountainous areas, geological disasters carrying large boulders can cause severe damage to the widely used masonry buildings due to the high impact forces. To better understand the damage of brick masonry buildings under the impact of boulders, a "block-joint" model is developed using threedimensional discontinuous deformation analysis(3-D DDA) to simulate the behaviour of the "brick-mortar" structure. The "block-joint" model is used to capture not only the large displacement and deformation of individual bricks but also the large-scale sliding and opening along the mortar between the bricks. The linear elastic constitutive model is applied to account for the non-plastic deformation behaviour of brick materials. Furthermore, the mechanical characteristics of the mortar are represented using the Mohr-Coulomb and Drucker-Prager criteria. To propose safe structural design schemes and effective reinforcement for brick masonry buildings, seven construction techniques are considered, includingdifferent grades of brick and mortar, effective shear areas and reinforced members. The proposed 3-D DDA model is used to analyse the velocity distribution and the key point displacements of the brick masonry building under the impact of boulders. The results show that upgrading the brick and mortar, increasing the wall thickness, making full use of the wall thickness, and adding a circular beam and structural column are very effective approaches for improving the impact resistance of brick masonry buildings.

Investigation of compensatory postures with videofluoromanometry in dysphagia patients

AIM: To investigate the effectiveness of head compensatory postures to ensure safe oropharyngeal transit. METHODS: A total of 321 dysphagia patients were enrolled and assessed with videofluoromanometry (VFM). The dysphagia patients were classified as follows: safe transit; penetration without aspiration; aspiration before, during or after swallowing; multiple aspirations and no transit. The patients with aspiration or no transit were tested with VFM to determine whether compensatory postures could correct their swallowing disorder. RESULTS: VFM revealed penetration without aspiration in 71 patients (22.1%); aspiration before swallowing in 17 patients (5.3%); aspiration during swallowing in 32 patients (10%); aspiration after swallowing in 21 patients (6.5%); multiple aspirations in six patients (1.9%); no transit in five patients (1.6%); and safe transit in 169 patients (52.6%). Compensatory postures guaranteed a safe transit in 66/75 (88%) patients with aspiration or no transit. A chin-down posture achieved a safe swallow in 42/75 (56%) patients, a head-turned posture in 19/75 (25.3%) and a hyperextended head posture in 5/75 (6.7%). The compensatory postures were not effective in 9/75 (12%) cases. CONCLUSION: VFM allows the speech-language therapist to choose the most effective compensatory posture without a trial-and-error process and check the effectiveness of the posture.

An integrated approach for modeling and solving the scheduling problem of container handling systems

An integrated model is presented to schedule the container handling system. The objective is to improve the coop- eration between different types of equipments, and to increase the productivity of the terminal. The problem is formulated as a Hybrid Flow Shop Scheduling problem with precedence constraint, setup times and blocking (HFSS-B). A tabu search algorithm is proposed to solve this problem. The quality and efficiency of the proposed algorithm is analyzed from the computational point of view.

Simulation of aerothermodynamics model on ballistic safety of fusible alloy fuze

In order to ensure the ballistic safety of fusible alloy fuze at reliable delay arming, melting point of fusible alloy needs to be calculated based on projectile velocity at safe time and distance. Taking shrapnel KZVD fuze of Switzerland oerlikon 2ZLa/353 35 mm double barrel self-propelled antiaircraft artillery as an example, based on the aerodynamics heating theory, the calculation of theory model and simulation of projectile head stagnation point temperature were done in initial stage of sim-plified exterior ballistic from engineering viewpoint when the initial projectile velocity was 1 175 m/s and the error was ±15 m/s. The melting point of fusible alloy in the safe distance was obtained by analyzing the temperature of projectile head stagnation point at corresponding projectile velocity. The simulated results indicate that the melting point of fusible alloy de-rived by theoretical calculation is identical with the result of simulation at the velocity range of 1 160 to 1 190 m/s. So the aero- thermodynamics model can be applied to design the fusible alloy fuze of corresponding melting point based on the requirement of safe distance. This method can be taken as the reference in studying the thermodynamic question of projectile flying at high speed.

Efficacy and safety of novel anticoagulants in the elderly

Atrial fibrillation and venous thromboembolism （VTE） are common disorders associated with maleficent thrombotic events, particularly in the elderly patients. Polypharmacy, co-morbidities, and altered pharmacokinetics, often present in these patients, render the use of antico-agulants quite challenging. Novel oral anticoagulants （NOACs） have recently emerged as alternatives to Vitamin K Antagonists （VKAs） and are gradually increasing their popularity mainly because of their fewer drug and food interactions and ease of use. Their effectiveness and safety has been weU-established in the general population but the balance between benefit and harm in the elderly is still unclear. Routine use in these patients is uncommon. Accumulating data have shown that the benefit of NOACs is consistent among all age groups, featuring equal or greater efficacy in preventing thrombotic events. Excess bleedings were lower with NOACs in comparison to VKAs, but bleeding patterns were disparate among them and head to head comparison is not available. The present review highlights on the efficacy and safety of novel anticoagulants in the elderly population.

Geometry Modeling of an Electronic Expansion Valve Head

This paper proposed that the flow characteristic of electronic expansion valve should be adapted to the evaporator superheat gain to refrigerant flow rate under different working conditions. Two native methods of geometry modeling of electronic expansion valve head were introduced. By analysis of them, some shortcoming was detected and a universal modeling method of electronic expansion valve head was put forward. Through this model, the flow characteristic of EEV and the influence factors can be investigated more deeply.

An Analysis of Formal Risk Assessments for Safety and Security in Ports： Empirical Evidence from Container Terminals in Greece

Nowadays, the most prominent risk assessment techniques are founded on the values of measuring and controlling the frequency and the consequences of risks in order to assure an ＂acceptable level＂ of ＂safeness＂ mainly in the lines of environmental, health and hygiene and port product issues. This paper initially introduces risk assessment approaches within the emerging role of ports Thereafter, it qualitatively assesses their potential for ports by discussing issues challenging every safety and security approach within the maritime industry such as proactiveness, organization, transparency, cost-effectiveness and, when possible, calibration to specific experiences. Moreover, an empirical study was conducted in order to provide evidence for formal risk assessment for safety and security in the main Greek port container terminals of Piraeus and Thessaloniki. The empirical research is based on in-depth semi-structured interviews with the administrations of container terminals. The results include important findings, regarding the likelihood of appearance of certain risks and their perceived severity in Greek container terminals. The collected answers and their analysis are also important for confirming the suggested theoretical formal risk assessment framework for ports.

A practical application of photogrammetry to performing rib characterization measurements in an underground coal mine using a DSLR camera

Understanding coal mine rib behavior is important for inferring pillar loading conditions as well as ensuring the safety of miners who are regularly exposed to ribs. Due to the variability in the geometry of underground openings and ground behavior, point measurements often fail to capture the true movement of mine workings. Photogrammetry is a potentially fast, cheap, and precise supplemental measurement tool in comparison to extensometers, tape measures, or laser range meters, but its application in underground coal has been limited. The practical use of photogrammetry was tested at the Safety Research Coal Mine, National Institute for Occupational Safety and Health(NIOSH). A commercially available, digital single-lens reflex(DSLR) camera was used to perform the photogrammetric surveys for the experiment. Several experiments were performed using different lighting conditions, distances to subject,camera settings, and photograph overlaps, with results summarized as follows: the lighting method was found to be insignificant if the scene was appropriately illuminated. It was found that the distance to the subject has a minimal impact on result accuracy, and that camera settings have a significant impact on the photogrammetric quality of images. An increasing photograph resolution was preferable when measuring plane orientations; otherwise a high point cloud density would likely be excessive. Focal ratio(F-stop) changes affect the depth of field and image quality in situations where multiple angles are necessary to survey cleat orientations. Photograph overlap is very important to proper three-dimensional reconstruction, and at least 60% overlap between photograph pairs is ideal to avoid unnecessary post-processing. The suggestions and guidelines proposed are designed to increase the quality of photogrammetry inputs and outputs as well as minimize processing time, and serve as a starting point for an underground coal photogrammetry study.

The vertical shaft construction technology of cutter head transformation of large diameter shield

Taking vertical shaft construction of cutter transformation of the Beijing underground diameter shield for example,the design and construction of cutter structure transformation under complex boundary conditions for large diameter shield were discussed.Practice about how to ensure the structure safety of the shaft as well as well-coordinated shield construction was explored,and reliable solutions were provided successfully,which can provide reference for similar projects.

Influence of Interference Fit and Surface Roughness on Contact Resistance of Tubing Connections

Within offshore installations, making tubing connections conduct electricity is a developing interest. Being able to use tubing structures to carry the drive power needed downhole avoids installation of cables and lines. The challenge is making the connection good enough with minimum possible power loss. At the same time, the connection has to secure the transfer of the rated power without any danger of overheating. An overheating can eventually result in a welded connection. Previous studies on contact design have mainly focused on low level contact force, while this study aims to find out the influence of surface roughness and connection strength, at macro level, on contact resistance of tubing connections so as to know the power transfer capability of the connection. First, the connection is simplified by ＂rolling out＂ the tubes to flat sheet metals and the voltage drop at rated current was measured at various loads. Then experiment was conducted on contact pairs with two different surface finish qualities and three different contact fits. The results show that smoother surfaces ease the flow of current while high interference fit increases the contact stability. The influence of surface topography becomes insignificantly low at high connection interference.

香河县全方位打造精品靓点绿化工程

2015年以来,河北省廊坊市香河县按照＂绿色河北攻坚工程＂和全市＂两年攻坚战,造林一百万＂的安排部署,牢牢把握京津冀协同发展和北三县统筹发展等重大机遇,聚焦＂争创全国绿化模范县＂目标,把植树造林作为建设＂生态香河、产业香河、品质香河＂的重要抓手,坚持上规模、上品质,全力实施＂一环、二沿、三线、十园、百村、千亩林果网片＂六大重点造林绿化工程。在此基础上,成功打造出国华影视基地精品牡丹园、潮白河森林公园、安头屯千亩林果采摘区、东方千年古葡萄庄园、

寻“力”基层文化

文化的力量在基层,没有基层文化的发展繁荣,就没有社会主义文化的大发展大繁荣。三月的华北,风儿恶作剧般把沙尘卷起来塞进人们嘴里,以此宣告春天的到来。一眼望不到头的樱桃园中,有人正在剪枝,动作不算熟练,但态度极其认真。其中一名人高马大的青年调侃道,'虽然这次活动中我们走了最近的基层,但也着实不易。'其他人听了,忍不住抿嘴笑起来。说话人叫汪亓,文化部团委副书记,来自故宫博物院。他所说的'这次活动'指的是文化部三月份推出的'文化青年走基层',在已经派出的8个调研小组中,他们是第五组。汪亓担任组长。

Clinical study on acupuncture for primary insomnia

Objective： To observe the clinical effect of Acupuncture at Baihui（GV 20）, Sishencong（EX-HN 1） and Anmian [Extra, locates at the midpoint between Yiming（EX-HN 14） and Fengchi（GB 20）] for primary insomnia. Methods： A total of 112 patients with primary insomnia were randomized into an acupuncture group and a medication group according to the visiting sequence, 56 cases in each group. The acupuncture group was intervened by acupuncture at Baihui（GV 20）, Sishencong（EX-HN 1） and Anmian [Extra, locates at the midpoint between Yiming（EX-HN 14） and Fengchi（GB 20）], and points selected based on syndrome differentiation, while the medication group was by oral intake of zopiclone tablet. The Pittsburgh sleep quality index（PSQI） was measured before and after treatment, and the clinical efficacy was compared after 1 month of treatment. Results： After treatment, subscales of PSQI and global score in the acupuncture group were improved, and intra-group comparisons showed statistical differences（all P〈0.05）; subscales of sleep quality, sleep latency, sleep duration and global score of PSQI in the medication group were improved, showing statistical differences（all P〈0.05）. Inter-group comparison of global and subscales scores of PSQI showed statistical differences（all P〈0.05）. The total effective rate in the acupuncture group was 92.9%, higher than 67.9% in the medication group, and between-group comparison showed a statistical difference（P〈0.05）. Conclusion： Acupuncture at Baihui（GV 20）, Sishencong（EX-HN 1） and Anmian [Extra, locates at the midpoint between Yiming（EX-HN 14） and Fengchi（GB 20）] as the main treatment method can produce a better effect than oral intake of zopiclone tablet.