无线电能传输感性系统特性分析

针对无尾家电中感性电机负载无线供电问题,本文分析了电机对谐振式无线能量传输系统的主要影响参量,以提高感性负载下能量传输的稳定性。首先,本文基于串励直流电机模型,分析电机转矩、转速及直流电压间关系,获得了等效电机阻抗模型。然后,利用Simulink仿真软件对电机启动及调速控制进行仿真,获得了在无线供电情况下的电机转矩-转速机械特性曲线。最后,本文设计并实现了直流电机无线供电系统硬件平台搭建以满足不同负载转矩需求,传输距离为6cm。

基于感性理性系统分化学说对中医针灸临床带教活动设计的探讨

医学实践是医学生成为合格医师的重要过渡阶段,中医针灸学的实践要求更是如此。针灸学是中医学重要的分支,对学生的临床带教目标要求带教老师具备医疗技能、知识积累、充分把握学生的人格心理。文章通过讨论现阶段中医针灸临床带教的困境,结合对中医学参与临床实践的学生人格发展的重新认识,考虑将感性理性系统分化学说引入中医针灸学的临床带教过程,将传统医疗技能的传授与现代心理医学模型融合,充分结合学生的知识积累、医疗技能、核心素养,发展出中医临床带教过程中的生本教育,激励学生由被动学习转化为主动学习。

ANKRD26相关血小板减少症及其血液系统肿瘤易感性

ANKRD26相关血小板减少症(ANKRD26-RT)是一种由ANKRD26基因的5′非翻译区突变引起的常染色体显性遗传的血小板减少症。患者通常表现为轻到中度的血小板减少,血小板大小和功能正常。此疾病出血表现轻微,但具有血液系统肿瘤易感性。该文将围绕ANKRD26-RT分子机制、临床特征、鉴别诊断、治疗等进行综述。

Bcl-2基因多态性、IL-21单核苷酸多态性与系统性红斑狼疮易感性的相关性分析

目的研究Bcl-2基因多态性、IL-21单核苷酸多态性与系统性红斑狼疮易感性的相关性。方法随机选取2012年5月～2015年5月间在我院接受治疗的200例系统性红斑狼疮患者作为研究对象,将其分为实验组;选取健康研究对象200例,分为对照组。观察两组研究对象Bcl-2主要基因型分布、等位基因分布以及IL-21单核苷酸多态性rs2243188位点等位基因及其基因型分布与系统性红斑狼疮临床症状的关系和Bcl-2与IL-21协同作用分析。结果两组研究对象Bcl-2主要基因分布差异明显,部分基因类型差异具有统计学意义（P〈0.05）;两组研究对象Bcl-2常见等位基因分布差异明显,部分基因类型差异具有统计学意义（P〈0.05）;IL-21单核苷酸多态性rs2243188位点等位基因及其基因型分布与系统性红斑狼疮临床症状密切相关;同时携带Bcl-2 195 bp和IL-21 138 bp易感等位基因的个体较单独携带Bcl-2 195 bp或IL-21 138 bp易感等位基因的个体患病的风险性更高。结论 Bcl-2基因多态性、IL-21单核苷酸多态性与系统性红斑狼疮发病密切相关,致病原因可能为两者直接参与系统性红斑狼疮发病部位或附近某个易感位点存在连锁不平衡,两者易感等位基因分布在决定系统性红斑狼疮易感性中存在协同作用。

PM2.5对高血脂症大鼠心血管系统的影响

目的观察PM2.5对高血脂症大鼠心血管系统的影响,分析高血脂症大鼠是否存在易感性。方法高脂饲料喂养诱导高血脂症的Wistar大鼠和普通饲料喂养的Wistar大鼠各32只,采用气管滴注不同剂量的PM2.5进行染毒,通过检测染毒后大鼠血清心肌酶、C反应蛋白、血脂,测量血压、心率,观察不同浓度的PM2.5对心血管系统的影响。结果大鼠经PM2.5染毒后,高血脂症组与对照组相比,心肌激酶、C反应蛋白、血压和心率均有显著性差异(P<0.05),且随着PM2.5剂量的增加而升高。结论 PM2.5对正常和病理状态的大鼠心血管系统均有损伤作用,但对高血脂症大鼠心血管系统的影响明显高于正常大鼠,提示高血脂症大鼠受PM2.5影响具有易感性。

感性工学:以用户为导向的工效学技术

感性工学是把用户对产品的感性意象转化为产品的设计要素。本文对感性工学的研究内容与方法进行了简要介绍,并对已有研究进行了评述。

汽车内饰色彩感性意象综合评价研究

目前,国内自主品牌汽车内饰色彩设计主要依靠设计者的赋色与修改,消费者感性参与度较低。为挖掘消费者感性诉求,运用感性工学的方法获取内饰色彩感性诉求,采用主成分分析法将感性数据降维处理,用少数变量表示总体变量信息,得出单个内饰色彩的意象贡献值;提出相对客观的感性意象评价系统并进行实例验证。该系统可结合汽车内饰色彩流行趋势和不断丰富的内饰新材料,逐渐补充新的色彩感性词汇,变更内饰色彩方案,重建感性语义空间,最大程度挖掘消费者感性诉求。结果表明:该系统量化了感性诉求与汽车内饰色彩的关系,从而可指导汽车内饰色彩的设计与开发。

Tightly-coupled model for INS/WSN integrated navigation based on Kalman filter

Aiming at the problem of poor observability of measurement information in the loosely-coupled integration of the inertial navigation system （INS） and the wireless sensor network （WSN）, this paper presents a tightly-coupled integration based on the Kalman filter （KF）. When the WSN is available, the difference between the distances from the blind node（BN） to the reference nodes （RNs） measured by the INS and those measured by the WSN are used as measurement information for the KF due to its better observability and independence, which can effectively improve the accuracy of the KF. Simulations show that the proposed approach reduces the mean error of the position by about 50% compared with loosely-coupled integration, while the mean error of the velocity is a little higher than that of loosely-coupled integration.

Distributed H_∞ fusion filter design for INS/WSN integrated positioning system

In order to keep stable navigation accuracy when the blind node （BN） moves between two adjacent clusters, a distributed fusion method for the integration of the inertial navigation system （INS） and the wireless sensor network （WSN） based on H∞ filtering is proposed. Since the process and measurement noise in the integration system are bounded and their statistical characteristics are unknown, the H∞ filter is used to fuse the information measured from local estimators in the proposed method. Meanwhile, the filter can yield the optimal state estimate according to certain information fusion criteria. Simulation results show that compared with the federal Kalman solution, the proposed method can reduce the mean error of position by about 45% and the mean error of velocity by about 85 %.

Design and nonlinearity compensation of Fabry-Perot type tunable optical filters for dynamic strain sensing systems

The collected spectrum of the fiber Bragg grating(FBG) and the loss of the detected optical power are discussed with respect to the 3-dB bandwidth of a Fabry-Perot(F-P) type tunable optical filter(TOF),respectively.And the optimized parameters of the TOF are obtained consequently.It is demonstrated that the relationship between the transmission wave-length of the TOF and its drive voltage is nonlinear.A new method to compensate the nonlinearity of the TOF is proposed.The linear sweeping of the transmission wavelength of the TOF is achieved through modifying the drive voltage using interpolation algorithm.It is observed that the average error and the maximum error of the transmission wavelength are reduced sharply under linear fit.The dynamic strain sensing is realized by use of a reference FBG and moving averaging algorithm in this system.

Tropheryma whipplei infection

Whipple's disease was initially described in 1907. Over the next century, the clinical and pathological features of this disorder have been better appreciated. Most often, weight loss, diarrhea, abdominal and joint pain occur. Occasionally, other sites of involvement have been documented, including isolated neurological disease, changes in the eyes and culture-negative endocarditis. In the past decade, the responsible organism Tropheryma whipplei has been cultivated, its genome sequenced and its antibiotic susceptibility defined. Although rare, it is a systemic infection that may mimic a wide spectrum of clinical disorders and may have a fatal outcome. If recognized, prolonged antibiotic therapy may be a very successful form of treatment.

Response of Ecosystem Respiration to Experimental Warming and Clipping at Daily Time Scale in an Alpine Meadow of Tibet

The alpine meadow, as one of the typical vegetation types on the Tibetan Plateau, is one of the most sensitive terrestrial ecosystems to climate warming. However, how climate warming affects the carbon cycling of the alpine meadow on the Tibetan Plateau is not very dear. A field experiment under controlled experimental warming and clipping conditions was conducted in an alpine meadow on the Northern Tibetan Plateau since July 2008. Open top chambers （0TCs） were used to simulate climate warming. The main objective of this study was to examine the responses of ecosystem respiration （Reco） and its temperature sensitivity to experimental warming and clipping at daily time scale. Therefore, we measured Reco once or twice a month from July to September in 2010, from June to September in 2011 and from August to September in 2012. Air temperature dominated daily variation of Reco whether or not experimental warming and clipping were present. Air temperature was exponentially correlated with Reco and it could significantly explain 58-96% variation of Redo at daily time scale. Experimental warming and clipping decreased daily mean Reco by 5.8-37.7% and -11.9-23.0%, respectively, although not all these changes were significant. Experimental warming tended to decrease the temperature sensitivity of Reco, whereas clipping tended to increase the temperature sensitivity of Reco at daily time scale. Our findings suggest that Reco wasmainly controlled by air temperature and may acclimate to climate warming due to its lower temperature sensitivity under experimental warming at daily time scale.

Detection Performance Analysis of Spectrum Sensing in Cognitive Radio Networks with Mobile Secondary Users

The majority of existing papers about spectrum sensing have the assumption that secondary users(SUs) are stationary. However,mobility is an essential feature of mobile communications networks. In this paper,the detection performance of spectrum sensing by mobile SUs was analyzed. Three performance metrics,i.e.,detection probability,miss detection probability and false alarm probability,were thoroughly investigated. In our analysis,a critical variable was the real-time received primary user signal power by a mobile SU. Its probability distribution and mathematical expectation were analytically derived. Moreover,the three performance metrics in single-node spectrum sensing and multi-node collaborative spectrum sensing systems were also derived. Extensive simulations were performed. The results are consistent with the theoretical analysis. And it is concluded that SU mobility has a significant impact on the detection probability and the miss detection probability,but not on the false alarm probability.

The effect of adenovirus expressing wild-type p53 on 5-fluorouracil chemosensitivity is related to p53 status in pancreatic cancer cell lines

AIM:There are conflicting data about p53 function on cellular sensitivity to the cytotoxic action of 5-fluorouracil (5-FU). Therefore the objective of this study was to determine the combined effects of adenovirus-mediated wild-type (wt) p53 gene transfer and 5-FU chemotherapy on pancreatic cancer cells with different p53 gene status. METHODS:Human pancreatic cancer cell lines Capan-1^(p53mut), Capan-2^(p53wt),FAMPAC^(p53mut),PANC1^(p53mut),and rat pancreatic cancer cell lines AS^(p53wt) and DSL6A^(p53null) were used for in vitro studies.Following infection with different ratios of Ad- p53-particles (MOI) in combination with 5-FU,proliferation of tumor cells and apoptosis were quantified by cell proliferation assay (WST-1) and FACS (PI-staining).In addition,DSL6A syngeneic pancreatic tumor cells were inoculated subcutaneously in to Lewis rats for in vivo studies. Tumor size,apoptosis (TUNEL) and survival were determined. RESULTS:Ad-p53 gene transfer combined with 5-FU significantly inhibited tumor cell proliferation and substantially enhanced apoptosis in all four cell lines with an alteration in the p53 gene compared to those two cell lines containing wt-p53.In vivo experiments showed the most effective tumor regression in animals treated with Ad-p53 plus 5-FU.Both in vitro and in vivo analyses revealed that a sublethal dose of Ad-p53 augmented the apoptotic response induced by 5-FU. CONCLUSION:Our results suggest that Ad-p53 may synergistically enhance 5-FU-chemosensitivity most strikingly in pancreatic cancer cells lacking p53 function.These findings illustrate that the anticancer efficacy of this combination treatment is dependent on the p53 gene status of the target tumor cells.

Observation System Experiments for Typhoon Nida(2004)Using the CNOP Method and DOTSTAR Data

This study investigated the influence of dropwindsonde observations on typhoon forecasts. The study also evaluated the feasibility of the conditional nonlinear optimal perturbation (CNOP) method as a basis for sensitivity analysis of such forecasts. This sensitivity analysis could furnish guidance in the selection of targeted observations. The study was performed by conducting observation system experiments (OSEs). This research used the fifth-generation Mesoscale Model (MM5), the Weather Research and Forecasting (WRF) model, and dropsonde observations of Typhoon Nida at 1200 UTC 17 May 2004. The dropsondes were collected under the operational Dropsonde Observations for Typhoon Surveillance near the Taiwan Region (DOTSTAR) program. In this research, five kinds of experiments were designed and conducted:(1) no observations were assimilated; (2) all observations were assimilated;(3) observations in the sensitive area revealed by the CNOP method were assimilated;(4) the same as in (3), but for the region revealed by the first singular vector (FSV) method;and (5) observations within a randomly selected area were assimilated. The OSEs showed that (1) the DOTSTAR data had a positive impact on the forecast of Nida's track;(2) dropsondes in the sensitive areas identified by the MM5 CNOP and FSV remained effective for improving the track forecast for Nida on the WRF platform;and (3) the greatest improvement in the track forecast resulted from the CNOP-based (third) simulation, which indicated that the CNOP method would be useful in decision making about dropsonde deployments.

Flood Hazard Prediction from Soil Properties by Remote Sensing and Genographic Information System:A Case Study of Mae Rim Watershed,Chiang Mai Province,Thailand

Physiography and soil in Mae Rim watershed, Chiang Mai Province, Thailand were investigated by using aerial photographs and satellite image in conjunction with field work, and soil infiltration rate and soil shear resistance were measured in field. Many factors affecting runoff were analyzed using the Integrated Land and Water Information System (ILWIS). As a result, a model determining flood hazard was set up. Three maps including runoff curve number map, runoff coefficient map, and flood inundation map were created. In addition, the time of concentration was predicted.

Orthogonality of inductosyn angle-measuring system error and error-separating technology

Round inductosyn is widely used in inertial navigation test equipment, and its accuracy has significant effect on the general accuracy of the equipment. Four main errors of round inductosyn,i.e. the first-order long-period (360°) harmonic error, the second-order long-period harmonic error, the first-order short-period harmonic error and the second-order short-period harmonic error, are described, and the orthogonality of these four kinds of errors is studied. An error separating technology is proposed to separate these four kinds of errors, and in the process of separating the short-period harmonic errors, the arrangement in the order of decimal part of the angle pitch number can be omitted. The effectiveness of the technology proposed is proved through measuring and adjusting the angular errors.

Parvovirus B19 induced hepatic failure in an adult requiring liver transplantation

Parvovirus B19 induced acute hepatitis and hepatic failure have been previously reported, mainly in children. Very few cases of parvovirus induced hepatic failure have been reported in adults and fewer still have required liver transplantation. We report the case of a 55-year-old immunocompetent woman who developed fulminant hepatic failure after acute infection with Parvovirus B19 who subsequently underwent orthotopic liver transplantation. This is believed to be the first reported case in the literature in which an adult patient with fulminant hepatic failure associated with acute parvovirus B19 infection and without hematologic abnormalities has been identified prior to undergoing liver transplantation. This case suggests that Parvovirus B19 induced liver disease can affect adults, can occur in the absence of hematologic abnormalities and can be severe enough to require liver transplantation.

Application of the Conditional Nonlinear Optimal Perturbations Method in a Theoretical Grassland Ecosystem

Using a simplified nonlinearly theoretical grassland ecosystem proposed by Zeng et al.,we study the sensitivity and nonlinear instability of the grassland ecosystem to finiteamplitude initial perturbations with the approach of conditional nonlinear optimal perturbation （CNOP）.The results show that the linearly stable grassland （desert or latent desert） states can turn to be nonlinearly unstable with finite amplitude initial perturbations.When the precipitation is between the two bifurcation points,a large enough finite amplitude initial perturbation can induce a transition between the grassland statethe desert state or the latent desert.

Technology of load-sensitivity used in the hydraulic system of an all-hydraulic core rig

The existing hydraulic system always have problems of temperature rise,runningstability and anti-interference of the implementation components,reliability of hydrauliccomponents,maintenance difficulties,and other issues.With high efficiency,energysaving,reliability,easy operating,stable running,anti-interference ability,and other advantages,the load-sensitive hydraulic system is more suitable for coal mine all-hydrauliccore rig.Therefore,for the technical development of the coal mine all-hydraulic core rig,the load-sensitive technology employed by the rig should be of great significance.