The raw data was processed by using axial, coronal and double oblique multi-planar reformation; Images obtained were graded in terms of quality with a 5-point scale(5=excellent, 4=good, 3=fair, 2=poor, and 1=nondiagnostic). In grading image quality at axial MPR, The radiologic specialists focused on the subarcuate fossa, tendon of tensor tympani, facial recess, vestibular aqueduct and pyramidal eminence, In grading image quality at coronal MPR, attention was given to the scute, crista transversa, fenestra cochleae, lateral malleal ligament and snake eyes signature of cranial nerve, In the grading of the image quality at double oblique MPR, the radiologic specialists concentrated on the malleus, incus, stirrup bone, upper bony semicircular and aquaeductus fallopii, and then to implement statistical analysis. In order to choose the minimum tube current values and the maximum pitch that can satisfy the diagnosis request, image quality of axial, coronal and double oblique reformation images was compared with different tube current groups. 15 ears of volunteers were used to test the validity with the scanning parameter. Subsequently noise, MTF and dose length product were measured by phantoms in different tube current and pitch, the parameters obtained were compared and taken into statistics analysis.

掃描模式使用臨床常用的顳骨螺旋掃描方式：管電壓120 kV欧美成年人片，準直寬度20×0.6 mm，視野200 mm66J8在线视频免费看，重建矩陣512×512日韩精品国语在线观看视频免费，旋轉時間1 s/r，重建層厚0.6 mm大屁股91，重建間隔0.3 mmr日本在线h，分別改變管電流(380、300久久亚洲精品无码a∨、200中文字幕一区2区、160、120和80 mA)和螺距(0.8国产特级黄色操逼毛片、1.0和1.2)進行掃描和重建快射视频十八禁网站，然后對顳骨進行橫斷面、冠狀面和雙斜面多平面重組少妇被又大又粗进进出出，于重組后的橫斷層面圖像上選取弓形下窩国产一级毛片视频无码网站、鼓膜張肌腱、面神經隱窩免费xx视频、前庭導水管和錐隆起5個解剖結構亚洲毛片av男人的天堂，冠狀面重組圖像上選取盾板、橫嵴、蝸窗国产偷窥真人视频在线观看、面神經的蛇眼征和錘骨外側韌帶5個解剖結構美女裸体黄18禁网站，雙斜面重組圖像上選取錘骨、砧骨老外肏中国女人屄HD、鐙骨精品无码麻豆AV福利网、上骨半規(guī)管和面神經管5個解剖結構，在雙盲的情況下由放射學專家分別對各管電流和螺距下掃描的重組圖像進行評分性欧美首页，隨后進行統(tǒng)計學處理肏穴视频在线观看，從中篩選出滿足診斷要求的最低管電流值和最大的螺距，分別采用患者25例(15耳)用該管電流值和螺距驗證其可行性激情自拍网一区2区；然后利用模體分別測試各管電流和螺距下的圖像的空間分辨率A,黄片免费视频、噪聲及其劑量長度積，并對測試所得參數數值進行比較和統(tǒng)計學處理国产一级A片A视频。

From the special viewpoint of information and belief, our analysis finds that through refusing free information the current self can restrain future selves' ill tendency when the external information are static stock. This conclusion can be supported by finite or infinite horizon model as well. When external information are dynamic flow, current self's controlling instrument is forestallment, sometimes he would invest even under negative net present value. Selective memory can also serve as a controlling instrument, current self selectively convey information to future selves.

本文選取了信息與信念這一獨特視角国产专区一，深入探討現(xiàn)期自我的控制手段，研究發(fā)現(xiàn)：當信息為靜態(tài)的存量時熟女屁眼，現(xiàn)期自我可通過拒絕外生信息克制遠期自我的不良傾向五月丁香六月婷综合综合久久，該結論在有限期或無限期模型中均成立；當信息為動態(tài)流量時99久久字幕re6热精品首页，時間不一致矛盾將侵蝕等待的期權價值黄色视频最新入口地址，現(xiàn)期自我會以搶先行動的方式拒絕進一步信息，甚至采取NPV為負的行動黄片视频欧美大全；現(xiàn)期自我也可通過選擇性記憶向遠期自我傳遞信息亚洲第一综合，這就是信息傳遞階段的控制手段。

In this paper, we systematically analyze the reason or factor effecting the leakage current, and adopt guard ring to reduce PIN-detector leakage current. The result indicated that the leakage current have been reduced 0.5 1 order by guard ring.

本文系統(tǒng)地分析了漏電流產生的機理及其主要的影響因素免费在线观看黄片小视频；在現(xiàn)有工藝條件基礎上国产精品99ri，采用保護環(huán)結構使PIN電流型探測器的漏電流減少了0.5～1個量級。

Use the Rogowski coil as the sensor and transmit the signal and energy with the optic fibre, analyse the principle of the measurement of harmonic current in HVDC system and the factors of its measurement of influence by opticelectricity and computer technology. The Rogowski coil is used to measure the harmonic current in HVDC system. It doesnot affect by direct current and has good frequency characteristics.

本文在全面分析高壓直流諧波電流測量方法的基礎上国产破处女出血视频，確定以空心線圈為傳感器欧美三级在线日韩，以光纖傳輸信號和能量，結合光電技術久久福利网站一区、微計算機技術A片免费看免费网址，系統(tǒng)地分析了諧波電流測量系統(tǒng)的工作原理及影響其測量的多種因素，提出了解決問題的具體方法和措施中文字幕37页。

AlN MSM devices were fabricated on AlN epitaxial thin film deposited on GaN/Sapphire substrates using helicon sputtering system at the low temperature of 300°C. The device characteristic was found to be improved by in situ metallization of Al electrodes. The extremely low dark current (1.39pA at 20V), the ideal factor (1.0125) and the Schottky barrier height (0.916eV) are superior compared to those of AlN MSM in the literature. When the device was illuminated by the 150W D2 lamp, the ratio of the induced photocurrent to dark current is more than 2 orders of magnitude. The illumination effect also shows the linear relationship between the radiation power and the photo current for the MSM devices, indicating the potential applicability for deep UV sensors.

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Not only the transmission line current but also aerial current is considered in the calculation of induced current.

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On the basis of the analysis and comparison of some sensors, Eddy Current Sensor is selected, and its equivalent circuit, strength and depth of the eddy current, radial distribution of the current, axile intensity of the magnetic inductorium are all analyzed. The processing circuit of sensors signal is designed. Because of coupling problem of the sensors, differential measurement of sensor is applied.

在分析比較各種傳感器特性的基礎上污在线91，選擇了電渦流傳感器作為轉子位移的檢測元件；分析了電渦流傳感器的等效電路久久精品国产亚洲av麻豆长发、渦流強度和深度久久精品视频在线、渦流的徑向分布、線圈軸上的磁感應強度中国国产黄色真人网站；設計了傳感器的信號處理電路久久天堂；對于傳感器始終存在的偏置耦合問題，提出了傳感器差動測量的方法999精品试频一区。

By means of forced synchronization of current in thyristor branch with the line current, the mode switching from capacitive mode to Bypass can be implemented. In the switching strategy from capacitive mode to inductive veriner mode, a method of thyristor conditional firing is put forward. The thyristors will be fired and conducted on condition that both line current and capacitor voltage are inphase.

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It is shown from the accelerated lifetime test and noise measurement for integrated operational amplifiers that if their failure is caused by the drift of input bias current or input offset current, the drift is strongly correlated with 1/f noise current in these devices, and both are proportional approximately.

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aining at high impedance weak signal measurement,the relations among measuring precision,input impedance and input bias current,the guard technology is applied to design a measuring circuit with guard circuit,adding a guard potential to low-impedance nodes of circuit,the effect of leakage current is reduced.using spice simulation and validates that guard circuit can increase the input impedance of the system and lower the input bias current,the results show that the guard circuit provids a valuable solution for high accuracy measurement of the high impedance weak signal.

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