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  segment of
     Results:①The abducens nerve can be divided into five segments: the cisternal segment with the length of (15.01±2.56)mm, the petroclival segment (6.38±1.78)mm, the posterior segment of ICA (2.81±1.32)mm, the superior segment of ICA (5.76±0.84)mm,and the anteroinferior segment of ICA (15.63±2.03)mm.
     结果:①展神经颅内段可分为5段:脑池段(15.01±2.56)mm,岩斜段(6.38±1.78)mm,动脉后段(2.81±1.32)mm,跨动脉段(5.76±0.84)mm,动脉前下段(15.63±2.03)mm;
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     The occurrence ratio of the middle eth- moidal artery was (36.7±8.8)%,and the middle ethmoidal artery originated from the third segment of the intraorbital ophthalmic artery in (54.5±9.1)%,the ophthalmic artery bend in (27.3±8.1)% and the second segment of the in- traorbital ophthalmic artery in (18.2±7.0)%.
     筛中动脉出现率为(36.7±8.8)%,起自O_3段(54.5±9.1)%、眼动脉弯(27.3±8.1)%和O_2段(18.2±7.0)%。
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     11 patients with 17 stents in 17 vessel tubes of cerebral artery were observed for 6 to 12 months after operation. Restenosis were seen in 11/17 of cerebral arteries (64%),and the restenosis was superior to 50 percent in 5/17,among them,2/17 in prosimal segment of middle cerebral artery(M_1),2/17 in extracranial segment of carotid artery,and 1/17 in prosimal segment of vertebral artery(V_1).
     11例患者于17根血管上放17枚支架,随访3~12个月,11/17出现了再狭窄(64%),超过50%的再狭窄为5/17,其中大脑中动脉M1段占2/17,颈内动脉颅外段(C1、C3段)占2/17,椎动脉起始部占1/17。
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     Nine planes were optimized as the standard to target the main branches of coronary arteries, and a comprehensive reproducibility reached 100% in demonstrating the proximal and middle segment of RCA (AHA-18, 19), LM (AHA-1, 2), proximal and middle segment of LAD (AHA-3, 5, 7), and proximal LCX (AHA-10).
     9个位置可以稳定地显示冠状动脉各主支 ,各位置综合对RCA近段和中段 (AHA 18、19段 )、LM全长(AHA 1、2 )、LAD近段和中段 (AHA 3、5、7段 ) ,LCX近段 (AHA 10段 )的显示可重复性为 10 0 % ;
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     ε_S values of the mid and apical segment of RVFW were higher than that of the base part (P< 0.05 ).
     其心尖段和中间段εS高于基底段(P<0.05);
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     In B2,B3,the level ascended (0.47±017),(0.50±0.35) spinal cord section(P>0.05).
     B2、B3组平面升高分别为(0.47±0.17)、(0.50±0.35)个脊神经节段(P>0.05)。
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     In A2,A3,the level ascended (2.02±0.54),(2.01±1.69) spinal cord section(P<0.05) respectively.
     A2、A3组阻滞平面升高分别为(2.02±0.54)、(2.01±0.69)个脊神经节段(P<0.05)。
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     ③Facial nerve was divided into 5 segments: intracranial segment(12.32 mm),internal acoustic meatus segment(9.18 mm),labyrinthine segment(5.14 mm),tympanic segment(11.82 mm) and mastoid segment(17.90 mm);
     ③面神经分为 5段 :颅内段 (12 .3 2mm)、内耳道段(9 .18mm)、迷路段 (5 .14mm)、鼓室段 (11.82mm)、乳突段 (17.90mm) ;
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     The results showed that: (1)The testosterone (T) in the serum before 30 d was 1.1 1.3 μg/L, then slowly increased to 240 d′s 5.22 μg/L.
     结果表明:(1)血浆中睾酮含量在30 日龄段(30 d)之前为1.1~1.3 μg/L,之后逐渐升至240 d 的5.22 μg/L。
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     African horse sickness virus(AHSV) is a member of the genus Orbivirus in the family Reoviridae and it has nine different serotypes. AHSV has ten segmented double-strand RNA genome(L1-L3,M4-M6,S7-S10),which encode ten proteins(VP1-VP7 and NS1,NS2,NS3/NS3A).
     非洲马瘟病毒属呼肠病毒科环状病毒属,有9个血清型,是一种有10个节段(L1~L3,M4~M6,S7~S10)的双链RNA病毒,编码10个蛋白(VP1~VP7和NS1,NS2,NS3/NS3A)。
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     4.The facial segment.
     4.面
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     2. kick-off section;
     2,造斜
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     The lesions in group C presented C type.
     y组()4)。
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     and communicating (C 7).
     交通 (C7)。
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  segment of
For the case where the aim of control is to drive the robot objective point to the straight segment of the trajectory, the results of calculations of the stability domains were presented for various formulations of the problem.
      
We identified a segment of gene expression that is essential for neoplasia.
      
The linear molecule of DNA covered with proteins in the redusome is assumed to be a copy of a segment of chromosomal DNA.
      
The source location corresponds to a segment of the booster trajectories at a distance of no less than 500-1000 km from the start position and to a flight altitude of no less than 100 km.
      
Absorbed doses in October-November 2003 onboard the Russian segment of the International Space Station according to the data of
      
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In this paper the general synthesis problem of optimal control systems with the criterion of transient responses as a positive integral functional (3) is discussed.In the first part it is assumed that the motion of controlled object is described by a system of ordinary differential equations and that the final states of the system form a bounded and closed convex region in n-dimentional euclidian phase space. A method is proposed for finding all optimal control functions which lead any starting state into the...

In this paper the general synthesis problem of optimal control systems with the criterion of transient responses as a positive integral functional (3) is discussed.In the first part it is assumed that the motion of controlled object is described by a system of ordinary differential equations and that the final states of the system form a bounded and closed convex region in n-dimentional euclidian phase space. A method is proposed for finding all optimal control functions which lead any starting state into the given final region of states. Some conclusions are obtained from the maximum principle by using transversal conditions of optimal trajectories in terminal points, and the particular properties of the stated problem are pointed out. The case of linear dif-ferential equations with integral quadratic functional criterion is investigated in detail.Further, in the second part the fundamental properties of isoloss regions, the rela-tions between the isoloss region and optimal control functions are indicated. As a direct result a partial differential equation determining the optimal loss-function J (x) is found and the connection between function J (x)and optimal vector control function u (x) is also stated. The methods proposed are practically the extension of the me-thods used by us for designing time optimal control systems as seen in [5, 6 ,7].Finally, an example is illustrated with optimal trajectories shown in phase plane.The necessary numerical data is calculated by an analog computer with high accuracy.

文中研究了具有公式(3)表示的一般正积分泛函的最优控制系统的综合问题.在第一部分中研究了具有控制参数的一阶微分方程组.控制系统的终点状态为n维相空间内的某一逐光滑边界的闭性区域Ω.文中指出了根据极大值原理和轨道终点的横截条件寻找引到Ω的所有最优轨迹的方法.这里详细地研究了具有二次泛函和被积函数中不明显含有控制参数的质量指标泛函的线性方程情况.在文中第二部分研究了等损耗区的主要特性.指出了等损耗区与最优控制函数之间的关系.导出了求算最优损耗函数J(x)的偏微分方程,以及这一函数与最优控制函数u(x)的关系.上述方法是我们曾在文献[5,6,7]中用过的最优快速系统的综合方法的推广.文章最后举有例证.

Formulas are derived for the solution of the transient currents of dissipative low-pass T-type electric wave filters. Oscillograms taken by cathode ray oscillograph for d-c. and a-c. cases are found to agree with results calculated from these formulas. From these calculations, the following conclusions are derived. When terminating resistance is gradually increased from O, the damping constants of the sine terms begin to differ from each other, ranging in decreasing magnitude from term of the lowest frequency...

Formulas are derived for the solution of the transient currents of dissipative low-pass T-type electric wave filters. Oscillograms taken by cathode ray oscillograph for d-c. and a-c. cases are found to agree with results calculated from these formulas. From these calculations, the following conclusions are derived. When terminating resistance is gradually increased from O, the damping constants of the sine terms begin to differ from each other, ranging in decreasing magnitude from term of the lowest frequency to the last term of cut-off frequency. Hence the transient is ultimately of the cut-off frequency. At cut-off frequency, this constant is near to but greater than R/2L. For each increase of section, there is introduced an additional sine term with smaller damping constant. Therefore transients die out faster in filters of smaller number of sections. Since transient amplitudes are of the same order of magnitude before and after cut-off, filtering property only exists in the steady states.

此篇先推求收端加电阻时,低频滤波器瞬流之公式。依此公式算出之图与用阴极光示波器映出之曲线相符合。自推算之结果,可得下列结论: (一)在滤波器收端电阻渐加时,瞬流各项之挫率渐互异,其数量由低频项至隔阻频之项顺序渐减;其最小数仍比收端无电阻时之挫率(R/2L)为大。故瞬流终必变为隔阻频之电流;而较收端无电阻时易于消减。 (二)当滤波器增加一时,瞬流之项数亦加一。所加项之挫率皆比前有者为小。故少滤波器之瞬流易于消减。 (三)在隔阻频後瞬流之数量与在其前者相彷恒较隔阻频後之安定数量大数十倍,故滤波之特性仅能见之于安定状态。

The circumferential vibration of a hollow quartz cylinder has been thoroughly studied. The empirical relation connecting the dimensions of the cylinder and the frequency of vibration has been formulated, and the temperature coefficients of the frequency determined. The temperature coefficient is practically zero for a wide range of temperature, when the ratio of the internal radius to the external radius of the cylinder approaches a value which is very close to 0.5.

以纯粹水晶割成空心圆柱,令圆柱之轴平行於晶体之光轴。于其里外二面,敷以铜质管状电极、置诸最简单之Pierce式振荡线路中,即能自生振动其振动之方式繁多,俱经吾人详细阐求,已在另文发表,茲不复赘。 各种振动方式中,以绕周振动发生最易。设圆柱内径与外径之比小于一去0.5极近之数,则绕周分三而振动;设大于此数,则分六而振动, 绕周振动之温度系数,亦经测定其法置圆柱於一特制之电炉中,连其二电极於振荡电路,令生振动。以所生高周率电流与一周率甚近之水晶片所生之高周率电流相干涉,由 是而生之低周率音差,复与一低周率振荡器相比较,若是则加热后圆柱振动周率之变化,可在该低周率振荡器上直接读之。 若是所得之结果绕周振动之温度系数,随其内外径之比而异。圆柱之绕周分三而振动者,其温度系数常为正;内外径之比率增加,则温度系数减少。圆柱之线周分六而振动者,其温度系数常为负;内外径之比率愈高,则温度系数愈大。惟适当三振动告终六振动肇端之时,则亘十馀度其周率几不以温度而变合二十馀度而平均计之其温度系数约为0.5×10~(-6)/C,小於寻常水晶片者五十馀倍。...

以纯粹水晶割成空心圆柱,令圆柱之轴平行於晶体之光轴。于其里外二面,敷以铜质管状电极、置诸最简单之Pierce式振荡线路中,即能自生振动其振动之方式繁多,俱经吾人详细阐求,已在另文发表,茲不复赘。 各种振动方式中,以绕周振动发生最易。设圆柱内径与外径之比小于一去0.5极近之数,则绕周分三而振动;设大于此数,则分六而振动, 绕周振动之温度系数,亦经测定其法置圆柱於一特制之电炉中,连其二电极於振荡电路,令生振动。以所生高周率电流与一周率甚近之水晶片所生之高周率电流相干涉,由 是而生之低周率音差,复与一低周率振荡器相比较,若是则加热后圆柱振动周率之变化,可在该低周率振荡器上直接读之。 若是所得之结果绕周振动之温度系数,随其内外径之比而异。圆柱之绕周分三而振动者,其温度系数常为正;内外径之比率增加,则温度系数减少。圆柱之线周分六而振动者,其温度系数常为负;内外径之比率愈高,则温度系数愈大。惟适当三振动告终六振动肇端之时,则亘十馀度其周率几不以温度而变合二十馀度而平均计之其温度系数约为0.5×10~(-6)/C,小於寻常水晶片者五十馀倍。割制此种圆柱,并无繁难,且电极简单,装置便利以之控制振荡,校准周率,对无线电通讯,裨益实多也。

 
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