在域中如何实现远程控制

本文介绍在域中如何实现系统远程控制,具体说明了如何配置Pcanywhere、域中实现远程安装、以及能够实现的一些功能。     

Pseudophakic accommodation with translation lenses – dual optic vs mono optic

PURPOSE: To investigate the pseudophakic accommodation effect in dual and mono optic translation accommodative intraocular lenses (AIOL) using linear matrix methods in the paraxial space. METHODS: Dual (anterior optic of power +32 D linked to a compensatory posterior optic of negative power) and mono lens power was determined in the non-accommodated state using linear geometric optics based on the Gullstrand model eye. The position of the AIOL was calculated from a regression formula. Pseudophakic accommodation was assessed with three systems: (1) forward shift of the mono optic lens, (2) anterior translation of the anterior optic in the dual optic lens system with an unchanged position of the posterior minus lens and (3) symmetrical anterior and posterior translation of the anterior and posterior lens. The Gullstrand model eye was modified by changing the axial length (and proportionally changing the phakic anterior chamber depth) to investigate the accommodative effect in myopic and hyperopic eyes. RESULTS: The dual optic lens system (2) yields a nearly constant accommodation amplitude of 2.4-2.5 D mm(-1) movement over the total range of axial lengths. The mono optic lens (1) provides a higher accommodative effect only in extremely short eyes (high refractive power of the lens), whereas for normal eyes (1.4-1.5 D mm(-1) movement) and for long (myopic) eyes the accommodative effect is much less than the dual optic lens. The dual optic lens system under condition (3) yields less accommodation amplitude compared with the dual optic system under condition (2) over the total range of axial length but provides higher accommodation amplitude compared with the mono optic lens system (1) with axial lengths greater than 22.3 mm (lens power 25.5 D). In the accommodated state, with lens translation of 1 mm, the absolute value of the lateral magnification increases with the refractive power of the mono optic lens (1) and decreases in both dual optic lens systems (under conditions 2 and 3). CONCLUSIONS: A mathematical strategy is presented for calculation of the accommodative effect of mono-optic and dual optic AIOL. The dual optic lens yielded a nearly constant accommodation amplitude of about 2.4-2.5 D mm(-1) translation, whereas the mono optic lens yielded an accommodative response of <2 D mm(-1) translation in long myopic or normal eyes. Only in extremely short eyes is the accommodative amplitude of the mono-optic lens higher than the dual optic lens.     

双层涡轮桨搅拌槽内混合过程的数值模拟

采用FLUENT软件对双层六直叶涡轮桨搅拌槽内的混合过程进行了数值模拟,选用RNG标准κ-ε模型及多重参考系法(MRF),通过改变网格策略,增加网格数量,并降低浓度收敛残差的方法,将速度场与浓度场方程分开求解,预测了不同的加料点、监测点位置及操作条件对混合时间的影响规律。模拟结果表明:搅拌功率的模拟值与实验值吻合良好,但由于模型基于各向同性的假设,且双层六直叶涡轮桨两桨之间子域的存在,混合时间的模拟结果与实验值有较大的误差。     

可穿戴式心电、呼吸传感器与检测系统的研制

叙述了一种可用于移动条件下对重要生命信号（心电、呼吸等）无损检测的可穿戴式传感器及其测量和传输系统的研制。导电纺织面料缝合在普通背心内侧特定位置上作为检测电极，通过缝在背心上的导电纺织线将电极上的信号引出到背心边缘，再连接到信号测量和传输系统，由其中的单片机和激励、放大和处理电路测量心电、心率、呼吸数据，通过RS232串口、蓝牙等通讯方式传送到PC机上，用Visual Basic编写的程序接收并显示图形和数据。     

通过PC机串口采集动态实时心电信号

介绍了网上心电实时监护系统，应用ATmega8型8位微处理器芯片实现了10位精度的心电AD转换．通过RS232行接口向PC机传送数据，并介绍这2部分的软、硬件设计思想。     

国境口岸突发公共卫生事件应急预案框架体系的构建

[目的]提高政府保障公共安全和处置突发公共卫生事件的能力,最大程度地预防和减少突发公共卫生事件及其造成的损害,保障公众的健康和生命财产安全,维护国家安全和社会稳定,促进经济社会全面协调、可持续发展。[方法]结合国境口岸应对突发公共卫生事件的实际情况,从3个方面对如何构建国境口岸突发公共卫生事件应急预案框架体系进行了研究。[结果]构建国境口岸突发公共卫生事件应急预案框架体系应包括构建框架体系的准则、框架体系内容、编制框架体系应把握的要点。[结论]构建国境口岸突发公共卫生事件应急预案框架体系对于提高检验检疫机构预防和处置口岸突发公共卫生事件的能力,全面履行卫生检疫行政职能具有十分重要的意义。     

双波长分光光度法测定牙周康的含量

目的　测定牙周康中甲硝唑和芬布芬的含量。方法　采用双波长分光光度法,甲硝唑以 314nm为测定波长,2 5 1nm为参比波长;芬布芬以 2 83nm为测定波长,340nm为参比波长,在上述波长下,分别测定吸收度值。结果　甲硝唑在 4 1～9 6 μg·ml-1,芬布芬在 3 1～ 7 2 μg·ml-1范围内,浓度与吸收度差值呈良好线性关系,甲硝唑平均回收率为 99 9%(RSD =0 33% ),芬布芬平均回收率为 10 0 0 %( RSD =0 2 7% )。结论　该法简便、快速、准确。     

非骨水泥型假体周围早期骨密度变化临床观察

为观察非骨水泥型假体置换术后周围骨密度的变化,对25例非骨水泥型人工假体置换患者分别于术后1周、3个月及6个月应用双能X线骨密度仪,按Grune[1]分7个测量兴趣区测量假体周围骨密度.结果显示假体周围骨密度术后3个月平均丢失11.7%,6个月平均丢失17.77%.其中以1和7区明显,1区术后3、6个月分别减少21.25%、25.55%(P＜0.01),7区术手3、6个月分别减少22.80%、32.14%(P＜0.01).说明假体置换术后早期周围骨密度均有不同程度的减少,其中以假体近端(1、7区)明显,且骨量丢失以术后前3个月最为显著.     

Dual-Port 2D and 3D Endoscopy: Expanding the Limits of the Endonasal Approaches to Midline Skull Base Lesions with Lateral Extension

Objective To investigate a novel dual-port endonasal and subtemporal endoscopic approach targeting midline lesions with lateral extension beyond the intracavernous carotid artery anteriorly and the Dorello canal posteriorly. Methods Ten dual-port approaches were performed on five cadaveric heads. All specimens underwent an endoscopic endonasal approach from the sella to middle clivus. The endonasal port was combined with an anterior or posterior endoscopic extradural subtemporal approach. The anterior subtemporal port was placed directly above the middle third of the zygomatic arch, and the posterior port was placed at its posterior root. The extradural space was explored using two-dimensional and three-dimensional endoscopes. Results The anterior subtemporal port complemented the endonasal port with direct access to the Meckel cave, lateral sphenoid sinus, superior orbital fissure, and lateral and posterosuperior compartments of the cavernous sinus; the posterior subtemporal port enhanced access to the petrous apex. Endoscopic dissection and instrument maneuverability were feasible and performed without difficulty in both the anterior and posterior subtemporal ports. Conclusion The anterior and posterior subtemporal ports enhanced exposure and control of the region lateral to the carotid artery and Dorello canal. Dual-port neuroendoscopy is still minimally invasive yet dramatically increases surgical maneuverability while enhancing visualization and control of anatomical structures.     

Measurement of lymph node function from the extraction of immunoglobulin in lymph

Abstract

Background. We aimed to measure the extraction fraction of human immunoglobulin G (HIG) by the 1st echelon lymph node (sentinel node) following intradermal injection in patients with breast cancer undergoing axillary lymph node dissection (ALND) and examine its association with node size and presence and extent of nodal metastatic disease. Materials and methods. HIG labelled with either In-111 (n = 21) or Tc-99m (n = 9) was injected intradermally at the areolar. ALND was performed 2–4 h later. All lymph nodes were isolated and individually counted in a well-counter. The counts in the ‘hottest’ (1st echelon) node were expressed as a fraction of total counts in all the resected nodes. Since counts in the least hot nodes barely exceeded background, this fraction represents extraction fraction for the 1st echelon node. Presence of disease was noted in each 1st echelon node and the extent quantified as percentage replacement with disease. Results. Median extraction fraction in 1st echelon nodes with no or low (<1%) disease burden (n = 21) was 68 (range 23–93)%, significantly higher (p<0.05) than in diseased 1st echelon nodes (n = 9), in which it was 44 (21–66)%. There was, however, no association between extraction fraction in diseased nodes and disease extent. In nodes with no/low disease, extraction fraction was similar for the two radiolabels. There was no association between extraction fraction and node size. Conclusion. Nodal extraction fraction of HIG is a novel physiological measurement. It is reduced as a result of metastatic invasion. In the absence of disease, it shows no correlation with node size.