He—Ne激光治疗偏头痛30例临床观察

用 He-Ne 激光治疗偏头痛30例,获效满意.本组30例,其中神经性头痛19例,血管性头痛11例。采用 He-Ne 激光仪,输出功率10mW,应用石英光纤传递光束,直接照射穴位。选穴为外关、风池、头维、太阳、阿是穴,每穴5分钟,一天一次,10次为一疗程,疗程间休息2～3天,治疗期间停止其它治疗。经治疗3～30天,痊愈27例,占90%。其中治疗1疗程20例,2疗程6例,3疗程1例.好转3例,占10%,总有效率达100%。其中神经性头痛全部在一个疗程内痊愈。从本组病例看,多数病例在治疗1～3次后就见效,往往在短期内就可得到治愈.说明 He-Ne 激光治疗偏头痛具有见效快、疗效高、不易复发等优点。仅见1例血管性头痛患老曾在治疗     

低功率激光治疗血管性头痛24例

低功率激光穴位照射治疗血管性头痛24例,总治愈率54.2％、好转率29.2％、无效率16.6％,但头痛部位治疗经穴的不同,疗效差别很大。前额痛、偏头痛的13例,照射主穴阳明、少阳经,全部治愈;     

半导体激光治疗偏头痛

头痛是临床上最常见的症状之一 ,头痛有很多种类型 ,引起头痛的原因也十分复杂。根据不同原因引起不同类型的头痛 ,临床治疗方法也不同 ,本文对采用半导体激光治疗机治疗的 5 7例偏头痛 (普通型 )患者进行了临床观察、分析及总结。临床资料　本组治疗的 5 7例患者均是门诊病人 ,其中男 2 6例 ,女 31例。年龄 2 1～ 5 2岁 ,平均为 38.7岁。病程最短为 9个月 ,最长为 5年 ,平均为 2年 5个月。根据对本组5 7例患者进行调查可知 ,患者偏头痛反复发作 ,以往每次发作持续时间约为 3～ 12天。间歇期自数天至半年不等。而病人一般都是在偏头痛发作 3…     

飞行人员头痛状况调查

目的调查飞行人员头痛患病情况：方法采用调查问卷方法,针对基层部队飞行人员进行有关头痛的调查。结果基层部队组经常头痛者患病率约为10％,其中紧张型头痛占90．5％,偏头痛占9．5％;直升机飞行人员头痛患病率18．8％,教练机飞行员头痛患病率36．5％。导致头痛的因素多为飞行任务重占42．9％、心理负荷大占35．7％。缓解头痛的方法休息占84．9％、药物占5．8％、运动占4．7％。结论头痛是飞行人员的常见疾病,以紧张型头痛为主。建议合理安排飞行任务,鼓励休息和运动消除症状.     

激光经络穴位疗法对难治性头痛症的疗效观察及机理分析

本文报道,激光经络穴位疗法治疗难治性头痛症14例,收到良好的效果。指出传统针剌疗法和激光生物作用二者间产生协同的、链式递增样效应,是这一疗法作用机理的核心。     

头痛头晕红外热成像诊断(附3214例报告)

头痛头晕红外热成像诊断（附３２１４例报告）ＤｉａｇｎｏｓｅｏｆＨｅａｄａｃｈｅａｎｄＤｉｚｚｙｂｙＴｈｅｒｍａｌＩｍａｇｅ徐锡殿（上海市东方医院，上海２００１２０）头痛头晕是常见病多发病，严重危害人类的健康及工作和学习。很多头痛头晕，尤其是功能性头痛...     

上颌窦穿刺诱发癫痫2例报告

病例 1,患者女性 ,3 8岁。因长期鼻塞、流浓涕伴头痛、嗅觉减退。经全身及局部药物治疗效果不佳而来院就诊。取得患者同意后 ,对其拟行双侧上颌窦穿刺术。按常规应用 3 %麻黄素液喷雾双侧鼻腔 1次 ,以充分暴露下鼻道 ,在鼻镜直视下采用 1%地卡因液棉扦行双侧下鼻道粘膜表面麻醉 1次。麻醉成功后即行上颌窦穿刺术。当穿刺针顺利进入右侧上颌窦内 ,取出针芯并准备采用生理盐水冲洗上颌窦窦腔时 ,患者突然身体向左侧偏倒。当时呼叫患者无反应 ,牙关紧闭 ,口吐白沫 ,眼球上旋 ,双上肢屈曲性抽搐。立即拔出穿刺针 ,扶患者就地平卧 ,查 :P10 0次 …     

YAG激光治疗慢性鼻炎264例疗效观察

慢性鼻炎,临床上常见的有:①慢性单纯性鼻炎,②慢性肥厚性鼻炎,③变应性鼻炎,门诊率高,药物及其他治疗,疗效不佳。有些患者,由于严重鼻塞,流涕,头昏,头痛,影响正常工作和学习,不得不进行手术治疗。二年来,我院对各种慢性鼻炎采取了YAG激光治疗,,取得为较了满意的效果。     

亚太地区走在光学组件市场的前头

光学组件全球增长率较上一季提高了9%,2010年第一季营收达12亿美元,若不是受限于供应吃紧,可能还有7%的增长空间。Ovum的初步研究结果显示,光学组件全球市场比去年增长了25％。供应吃紧是供货商最头痛的问题。市场一面看好发展前景，供货商预测每季连续都有4％～10％的增长。市场步上两位数年度增长率正轨，从2009年两位数的衰退率的谷底反弹回升。     

氦-氖纤维光针治疗神经官能症

我们治疗35例病人,均系门诊患者。具有头痛、头晕、失眠、多梦、记忆力减退等症候群,同时排除其他疾患而确诊为神经官能症。其中男17人,女18人;年令最小者14岁,最大64岁;病程最短者7天,最长者21年。     

鼻咽癌误诊原因分析

目的：分析460例鼻咽癌患者的误诊原因。方法：选取1998年1月至2004年12月我院收治的经病理确诊的鼻咽癌患者460例,分析其临床表现、误诊率及误诊原因。结果：本组病例主要表现为涕血、耳鸣重听、头痛、颈部包块和颅神经损害,首诊误诊率为87．75％。结论：本文结果表明对具有上述症状的病人进行仔细的鼻咽部检查是降低鼻咽癌误诊率的重要措施。     

波姆仪联合奥平栓治疗宫颈糜烂临床体会

1　临床资料和方法1.1　资料2 0 0 0年 6月 -2 0 0 2年 6月在我院门诊收治宫颈糜烂者 3 90例 ,年龄 2 0 -5 0岁 ,平均年龄 3 2 .5岁 ,均经细胞学检验排除细胞异常 ,阴道分泌物检查除外滴虫。念珠菌感染。1.2　宫颈糜烂诊断标准根据郑怀美主编《妇产科学》第三版的诊断标准 ,按糜烂面积分为 1度、2度、3度 ;按病理分为单纯、颗粒、乳突型。随机分为 3组 ,1组奥平组 13 5例 ,2组单纯波姆光治疗组 12 5例 ,3组波姆仪联合奥平组 13 0例 ,见表 1表 1　治疗前 3组宫颈糜烂分布情况组别例数　分　　　　度　　分　　　　型　ⅠⅡⅢ单纯型颗粒型乳突…     

Optimum conditions of molding VFBGA chips with very minimal gold wire damage using the Taguchi methods

This study employed the analysis of mean (ANOM) of the Taguchi methods to determine the optimal conditions for the very fine pitch ball grid array (VFBGA) transfer molding of a microelectronic assembly with the aim of minimizing wire damage. The optimal conditions include: (1) a substrate preheat temperature of 177 °C, (2) two-step mold clamping in which the clamping force in the first-stage is 9 t and the full clamping force in the second-stage is 28 t, (3) a mold temperature of 180 °C, and (4) a total of 20 vacuum holes in the bottom mold. Experiments to confirm the efficacy of the optimal conditions indicated that the average percentage of samples with wire damage was reduced to 0.02%. The percentage contribution of each controllable factor in the current investigation was also determined via ANOVA (analysis of variance) of the Taguchi methods. Among the four controllable factors, the number of vacuum holes in the bottom mold proved to be the one with the greatest influence on wire damage with a percentage contribution of 71.25%. We also describe the mechanism underlying wire damage associated with vacuum holes. Our findings led us to modify the existing VFBGA process, wherein the maximum defect percentage per sub-lot was decreased from 1.31% to 0.12%, and the average defect percentage in 14 sub-lots was decreased from 1.10% to 0.03%.     

光子带隙光纤中纤芯环掺杂对传输特性的影响

为了研究光子带隙光纤中纤芯环掺杂浓度的百分比对光纤传输特性的影响,利用全矢量有限元法在纤芯环掺杂浓度的百分比为1%～5%的条件下对7孔光子带隙光纤纤芯环掺杂和19孔光子带隙光纤纤芯环掺杂两种结构进行了仿真,比较了两种结构的纤芯模能量分布曲线,并且给出了19孔光子带隙光纤在不同的纤芯环掺杂浓度的百分比下,光纤带宽、色散、有效模面积和有效折射率的分布曲线图。结果表明,19孔光子带隙光纤比7孔光子带隙光纤具有更强的限光能力,且纤芯环掺杂浓度的百分比对光子带隙光纤的传输性能有显著的影响。     

Comparison of pattern recognition methods for computer-assistedclassification of spectra of heart sounds in patients with a porcinebioprosthetic valve implanted in the mitral position

The diagnostic performance of two pattern recognition methods (or classifiers) to detect valvular degeneration was evaluated in 48 patients with a porcine bioprosthetic heart valve inserted in the mitral position. Twenty patients had a normal porcine bioprosthetic valve and 28 patients had a degenerated bioprosthetic valve. One method was based on the Gaussian-Bayes model and the second on the "nearest neighbor" algorithm using three distance measurements. Eighteen diagnostic features were extracted from the sound spectrum of each patient and, for each method, a two-class supervised learning approach was used to determine the most discriminant diagnostic patterns composed of 6 features or less. The probability of error of the classifiers was estimated with the leave-one-out approach. The performance of each method to discriminate between normal and degenerated bioprosthetic valves was verified by clinical evaluation of the valves. The best performance in evaluation of the sound spectrum (98% correct classifications) was obtained with the Bayes classifier and two patterns of six features each. The percentage of false positive classifications of valve degeneration was 0% and the percentage of false negative classifications was 4%. Sensitivity for the detection of valve degeneration was 96%, specificity was 100%, positive predictive value was 100%, and negative predictive value was 95%. The best performance of the nearest neighbor method (94% correct classifications) was obtained by using the Mahalanobis distance and five patterns composed of three, four, five, or six diagnostic features. Using a pattern composed of only three features, the percentage of false positive classifications for degeneration was 10% and the percentage of false negative classifications was 4%.(ABSTRACT TRUNCATED AT 250 WORDS)     

开设物理及材料科学类课程情况调查

本文对目前国内高校电子科学与技术专业开设物理及材料科学类课程的情况进行了调查,结果表明:96%的高校开设了物理及材料科学类的课程,作为必修课的高校有64%,使用通用教材的高校有78%,认为开设此类课程有必要性的高校有95%,认为对学生就业和继续深造有作用的高校为100%,从而为电子科学与技术专业教学指导分委员会制定专业规范和发展战略提供了数据依据。     

He-Ne激光照射对大鼠神经损伤后自残及神经再生的影响

本实验利用大鼠坐骨神经钳夹损伤模型 ,观察了氦氖 (He -Ne)激光照射 (A组 )、直流电针刺激器 (B组 )、对照组为 (C组 )对神经损伤后自残及神经再生的影响。结果 :( 1)术后 2 0d ,A组的右后足趾自残率为 13 % ,而B、C组分别为 46%、80 % ,A组的自残率显著低于其它各组(P <0 .0 0 1) ;( 2 )右侧屈肌反向阈 :当激光照射时光斑直径 0 .6cm ,功率密度为 3 5 .3 9mW/cm2 时 ,可引出短潜伏期 ( 4 5 -15 0ms)及长潜伏期 ( 12 5 5 2 5ms)传入纤维反应 ;( 3 )术后 2 0d脊神经节的标记细胞百分率分别为 11.1% (A组 )、5 .2 % (B组 )及 1.1% (C组 ) ;脊髓前角的标记细胞百分率分别为 16.6% (A组 )、8.1% (B组 )及 1.9% (C组 )。上述结果表明 :氦氖 (He -Ne)激光照射在抑制神经损伤后自残及促进周围神经再生等方面具有更显著的生理功效     

Electrical Conductivity of Thick Films Made from Silver Methylcarbamate Paste

We have explored the electrical conductivity of thick films made from silver methylcarbamate paste using metallic silver as the electrically conductive phase. The paste was composed of 30 wt.% to 90 wt.% organic vehicle and 10 wt.% to 70 wt.% functional phase precursor (silver methylcarbamate). After the paste was sintered, films with thickness of 4.50 μm to 12.70 μm were obtained, in which the elemental percentage of silver varied from about 5 wt.% to above 99 wt.%. Experiments showed that both the electrical conductivity and the elemental percentage were mainly affected by the initial silver content in the paste and the parameters of the sintering process. For given sintering conditions, higher initial silver content led to higher elemental percentage of silver, improving the electrical conductivity of the thick film. The conditions of the sintering process had a significant influence on the evaporation and decomposition rates of the paste components, the elemental percentage of silver, and the microstructure of the thick film. Higher temperatures, longer times, lower heating rates, and more oxygen-rich sintering atmospheres were found to accelerate the evaporation and decomposition and increase the elemental percentage of silver, both of which served to enhance the electrical conductivity. For initial silver contents less than about 10 wt.%, the lowest electrical resistivity of the thick film only reached the order of 10^?4 Ω cm, irrespective of the sintering conditions. For contents between 10 wt.% and 25 wt.%, it was possible to attain lowest resistivity values on the order of 10^?5 Ω cm. Above 25 wt.%, the lowest resistivity could reach 10^?6 Ω cm, comparable to that of bulk silver.     

An approach of defending against DDoS attack

An approach of defending against Distributed Denial of Service （DDoS） attack based on flow model and flow detection is presented. The proposed approach can protect targets from DDoS attacking, and allow targets to provide good service to legitimate traffic under DDoS attacking, with fast reaction. This approach adopts the technique of dynamic comb filter, yields a low level of false positives of less than 1.5%, drops similar percentage of good traffic, about 1%, and passes neglectable percentage of attack bandwidth to the victim, less than 1.5%. The prototype of commercial product, D-fighter, is developed by implementing this proposed approach on Intel network processor platform IXP1200.