急性一氧化碳中毒的脑CT表现

目的探讨急性一氧化碳中毒的脑CT表现。方法对36例急性一氧化碳中毒患者进行颅脑CT检查。结果有基本正常、苍白球低密度灶、脑白质广泛低密度、后期脑萎缩等几种改变。结论CT扫描可提示脑是否损伤、损伤程度及判断患者预后情况,为临床进一步治疗提供可靠依据。     

CT扫描对输尿管远端结石大小的预测价值

目的探讨CT在提供输尿管结石排出方面的预测价值。方法69例输尿管远端结石的患者进行了CT扫描,41位排出完整结石的患者纳入本研究,CT测量结石的最大横径,且用电子测径器测量排出结石的最大横径。结果患者排出的结石最大横径实际大小平均为(5.78mm±1.81)(范围1-9.2mm),CT最大横径测量值大小平均为(5.77mm±2.03()范围2～9.4mm),CT测量值和结石实际大小的相关系数为0.005(P<0.05),具有相关性。结论非增强螺旋CT能对体内结石能否自行排出具有预测价值,对临床治疗有指导作用。     

早期气管切开在抢救急重症颅脑损伤的临床价值

目的对比早期气管切开与非早期气管切开在抢救重度颅脑损伤病人中的临床价值。方法对估计近期内意识不能恢复的重度颅脑损伤病人行气管切开,根据受伤到行气管切开的时间分为两组,伤后12h内行气管切开者为A组,伤后12h后行气管切开者为B组。结果A组死亡率为39.02%,B组死亡率为57,45%。结论重度颅脑损伤病人早期行气管切开比非早期气管切开更有临床价值。     

颅脑损伤患者中CT扫描的诊断意义

目的探讨CT扫描在颅脑损伤患者的诊断中的作用及意义。方法对本院2005年6月至2007年3月期间脑外科收治的164例颅脑损伤患者为研究对象,对其临床资料及CT表现进行回顾性分析。结果头皮损伤82例,颅骨损伤50例,硬膜外和硬膜下出血16例,蛛网膜下腔出血10例,脑挫裂伤和脑血肿及其它8例。结论及时对颅脑外伤患者进行CT检查,可为临床医生的对症治疗提供可靠的依据,并为治疗赢得宝贵时间。能够有效降低病死率和减少后遗症。     

CT扫描对老年人脑出血诊断价值分析

目的探讨CT扫描对老年脑出血患者诊断价值。方法回顾我院CT科2008年1月至2009年12月报告为脑出血老年患者82例临床资料,跟踪随访患者临床治疗和预后情况,比较分析CT诊断与临床诊断符合率、患者死亡率及不同部位、不同出血量与患者死亡率的关系。结果本组82例老年患者诊断均于经临床内科治疗或手术治疗验证为脑出血,诊断符合率达100%;其中存活65例,死亡17例,死亡率为20.73%;死亡患者中以合并脑室出血患者死亡率最高,达42.86%;出血量<50mL者存活率显著高于出血量>50mL者,反之亦然(P<0.01)。结论 CT扫描可以早期诊断脑出血并能准确判断出血部位、出血量,对临床治疗和患者预后关系意义重大。     

临床观察不同手术方法治疗急性颅脑创伤的效果

目的观察不同手术方法治疗急性颅脑创伤的临床效果。方法本文采用改良大骨瓣开颅内外减压手术治疗急性颅脑创伤,并与常规骨瓣开颅手术治疗进行临床疗效比较。结果观察组脑中线移位基本恢复的患者明显多于对照组(P<0.05)。观察组术后颅内压明显低于对照组(P<0.05),观察组平均GCS计分、恢复良好和中残病例数均明显高于对照组(P<0.05)。结论改良大骨瓣开颅内外减压术能有效降低急性颅脑损伤患者的颅内压,改善患者的预后,提高急性颅脑损伤治疗效果;具有显露充分、操作方便优点,值得临床推广使用。     

外伤性脑梗死26例治疗体会

目的探讨颅脑损伤后脑梗死的原因、处理方法及治疗效果。方法回顾性分析26例颅脑损伤后出现脑梗死患者临床表现及治疗。结果好转出院13例,病危自动出院5例,死亡8例。结论外伤性蛛网下腔出血是病人发生脑梗死的重要原因,外伤早期在治疗原发病的同时积极防治脑血管痉挛,对改善患者预后有重要意义。     

高钠血症对颅脑损伤患者预后的影响

目的探讨各种颅脑损伤的患者病程中出现高钠血症后对其预后的影响。方法分析247例各种颅脑损伤患者的临床资料,记录血钠的测定值,治疗及预后的情况,并对所得数据进行统计学处理与分析。结果高钠血征的出现与疾病种类无关;高钠血症患者的死亡率明显高于正常血钠者;同时持续性高钠血征的纠正与否均不改善预后。结论持续性高钠血症的出现暗示着颅脑损伤病情的加重,预后不佳。     

颅脑损伤病人下肢深静脉血栓形成的临床护理

目的探讨颅脑损伤病人下肢深静脉血栓(DVT)形成后的临床护理方法。方法通过对14例颅脑损伤并发下肢静脉血栓形成病人采用溶栓、抗凝治疗,配合适当抬高患肢,避免患肢液体输入,加强患肢肿胀、皮温、血运等各方面的观察,掌握正确的临床护理方法。结果本组14例病人治疗3周,1例并发肺栓塞,临床死亡,其余病人临床症状好转。结论颅脑损伤并发下肢静脉血栓形成病人,正确的临床护理措施,可以减少致命并发症的出现,加快临床恢复。     

重型颅脑损伤患者的早期肠内营养支持治疗

目的探讨重型颅脑损伤患者早期肠内营养支持治疗的效果。方法回顾性分析我院2006年4月至2008年4月应用肠内营养乳剂早期肠内营养支持治疗112例重型颅脑损伤病人的治疗经验。结果112例病人中,除3例因发生严重并发症而暂时中断外,其余病例均顺利地接受了早期肠内营养,并能维持需较长期肠内营养支持病人的需要。结论肠内营养方便,经济,并发症少,可以提供患者所需要的营养素,且能增强免疫,减少感染。绝大多数病人能较顺利接受早期肠内营养支持治疗。     

底座连接口特征参数对显示器后壳注塑质量的影响分析

在Moldflow分析软件的基础上,对显示器后壳进行仿真研究,以翘曲变形量为质量指标,结合控制变量法进行单因素变动实验,保持注射工艺参数不变,研究显示器后壳底座连接口对制品翘曲变形的影响.对数据进行图表分析,结果表明显示器后壳尺寸定位68.58 cm(27英寸)时,底座连接口选用圆形,连接口位置距离底边26 mm,尺寸...     

The role of the symmetry and the flexibility of the anion on the characteristics of the nanostructures and the viscosities of ionic liquids☆

The transport properties of ionic liquids (ILs) are crucial properties in view of their applications in electrochem-ical devices. One of the most important advantages of ILs is that their chemical–physical properties and conse-quently their bulk performances can be well tuned by optimizing the chemical structures of their ions. This will require elucidating the structural features of the ions that fundamentally determine the characteristics of the nanostructures and the viscosities of ILs. Here we showed for the first time that the“rigidity”, the order, and the compactness of the three-dimensional ionic networks generated by the anions and the cation head groups determine the formation and the sizes of the nanostructures in the apolar domains of ILs. We also found that the properties of ionic networks are governed by the conformational flexibility and the symmetry of the anion and/or the cation head group. The thermal stability of the nanostructures of ILs was shown to be con-trolled by the sensitivity of the conformational equilibrium of the anion to the change of temperature. We showed that the viscosity of ILs is strongly related to the symmetry and the flexibility of the constitute ions rather than to the size of the nanostructures of ILs. Therefore, the characteristics of the nanostructures and the viscosities of ILs, especially the thermal stability of the nanostructures, can be fine-tuned by tailoring the symmetry and the conformational flexibility of the anion.     

浅谈设备的性能与操作对胎面压出质量的影响

简要介绍了胎面压出的工作原理及工艺过程，对设备的配置及操作对胎面压出质量的影响进行了分析，并对压出过程中常见的质量缺陷、造成的原因以及解决措施提出了自己的见解。     

Investigation of the effects of fatty acids on the compressive strength of the concrete and the grindability of the cement

In cement industry, a great energy consumption has been observed during grinding of clinker. To reduce this consumption, some waste products have been used as grinding aids.In this investigation, the effects of sunflower oil (SO), oleic acid (OA), stearic acid (SA), myristic acid (MA) and lauric acid (LA) on the fineness and strength of the cement have been examined. These aids were added into clinker in certain ratios based on the cement clinker weight and the grinding has been done for a definite time at the same condition.All of the fatty acids used increased the fineness as compared with the cement without the grinding additives. SO and OA decreased the strength significantly, LA decreased it to a lesser extent and SA increased it definitely according to the common cement. But MA did not alter the strength of the cement as much as SA. In addition, the covering of the balls influences the grinding of cement clinker unfavourably.     

煤粉流动性对GSP气化炉气力输送的影响研究

针对GSP气化装置煤粉气力输送在试车阶段出现的煤粉锁斗下料不畅、发料罐输送性能不佳等问题,从原料煤性质和工业装置的改进方面出发,通过煤粉的流动性参数的测量与研究,分析出现上述工程问题可能的内在原因,并提出工业装置改进方法,为保证GSP煤粉气力输送工业装置的正常运行提供解决办法。     

关于建立火炸药安全数据库的探讨

由反映火炸药及其制品的危险性能和用于对它们的生产、储运系统进行安全评价数学模型出发,探讨了如何建立一个全面、实用的火炸药安全评估数据库。通过对此数据库内容、数据表示方法、数据搜索方法以及建立步骤的讨论,明确了该数据库的使用对象和主要功能。     

The effect of the length of the oxyethylene chain on the conductivity of the polyurethaneurea electrolyte

Polyurethaneureas (PUU), which were synthesized from 4,4′-diphenylmethane diisocyanate (MDI), poly(ethylene glycol) (PEG), and 3,5-diaminobanzoic acid (DABA), were used as polyelectrolytes in this study. Differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FT-IR) were used to monitor the effect of the various kinds of PEG on the changes in morphology of PUU electrolytes corresponding to the concentration of lithium perchlorate (LiClO₄) dopants. The results of DSC and FT-IR indicate the Li⁺ ions coordinate with the soft and hard segments. Additionally, the crystallinity of the PEG soft segment and the ordered hydrogen-bonded urea carbonyl groups decreased with increasing salt concentration. Impedance spectroscopy (IS) measurements show that the PUU electrolyte with the high phase separation degree has the high ionic conductivity. The hard-segment T_g and the soft-segment T_m influence the conductivity behavior of polyelectrolytes with increasing measurement temperature.     

转子挤压组合凹模的应力分析

组合凹模的应力分析是一个非常复杂的问题，对其进行精确分析是解决模具寿命的关键。本文采用有限元分析软件Ansys对转子的组合凹模进行了分析，为转子组合凹模的优化设计提供了依据。     

Effect of the drafting force on the strength of the bottom of the spinneret

In spinning basalt fibres, the drafting force is in the same range as in spinning of glass fibres. The effect of the drafting force can not be considered in the calculation for the strength and rigidity of the bottom of the spinneret. __________ Translated from Khimicheskie Volokna, No. 5, pp. 47–50, September–October, 2007.