双位

Species richness of phytophagous insects in plantation of transgenic insect-resistance hybrid poplar 741 was obviously lower than that of neutral arthropod. The individuals of intermediate and top species apparently increased.

转双抗虫基因741杨（简称转基因741杨）节肢动物群落中，基位物种的植食性昆虫丰富度显著降低，但中性节肢动物丰富度却明显增加。

The 3D numerical simulation of 154kA prebake anode aluminum reduction cells is conducted by the combination of the scalar voltage potential method and two scalar magnetic potential method s.

以标量电位法和双标量磁位法相结合，对 15 4kA预焙铝电解槽磁场进行三维数值计算。

We describe a 26-year-old female with a long-standing history of abnormal scarring tissues, presenting with pretibial waxy violaceous plaques for more than 20 years. Premature loss of permanent teeth is also noted.

我们於此提出一病例报告，一位26岁女性双侧胫前出现蜡样、棕紫色的斑块长达20年且合并早发性的恒齿脱落。

The mineralization-alteration in Shuangfengshan appears in downward succession of silica breccia zone, low grade gold-bearing silica rock zone, quartz stockwork zone, pyrite montmorillonite zone and propylitic alteration zone.

这两个成矿阶段同源同位的蚀变矿物晕叠套，造成双峰山矿床蚀变分带从上至下为隐爆矽质角砾岩化带、低金品位矽质岩带、石英网脉带、黄铁矿蒙脱石化带和青磐岩化带。

The minera lization_alteration in Shuangfengshan appears in downward succession of silica b reccia zone, low grade gold_bearing silica rock zone, quartz stockwork zone, pyrite montmorillonite zone and propylitic alteration zone.

这两个成矿阶段同源同位的蚀变矿物晕叠套，造成双峰山矿床蚀变分带从上至下为隐爆硅质角砾岩化带、低金品位硅质岩带、石英网脉带、黄铁矿蒙脱石化带和青磐岩化带。

With the static model, the correction effect for each mm of surgery was calculated after the horizontal recti were resected or recessed, or both recti recessed, or one rectus resected and its antagonist recessed, and the result matched that of clinical operations.

用本文提出的眼球静力学模型，计算了单水平直肌缩短或止点移位、双水平直肌移位、单水平直肌缩短加其拮抗肌的移位时，手术量与眼位矫正量的关系。结果表明，用三维三线模型计算的结果与临床数据符合的较好。

The working principle of a novel short st roke linear DC motor wit h permanent magnet s is presented. Mixed digital - analog cont rol approach based on DSP ( TMS320L F2407A) is proposed. Displacement detecting and cont rol technique are discussed. Displacement detecting circuit s , digital - to - analog converter (DAC7641) expanded circuit s and cont rol software are given.

阐述了一种新研制的短行程永磁直流直线电机的工作原理，提出了基于DSP ( TMS320L F2407A)的短行程直流直线电机数、模混合伺服控制系统方案，重点对直线电机的位置检测及控制技术进行了研究，给出了DSP 控制器的位置检测接口电路、16 位双极性数模转换器(DAC7641)的扩展电路和控制软件的实现方法。

The trophoblast blood flow spectrum could be easily detected with the guide of CDE.The ultrasonic findings were characterized by broad arterial flow spectrum,high diastolic component of the low resistance trophoblastic flow,RI＝0.40～0.51 with single or biphasic spectrum.The salpingian ring with high blood flow indicated early and complete salpingian pregnancy.

结果：①异位妊娠包块血流信号丰富，血管连续性好，能较完整显示血管床、血管网及范围广的低流速血流信号；②脉冲多普勒取样为滋养层周围性血流频谱，其特征为：频谱增宽、单相或双相持续存在、阻力降低(RI＝0.44±0.04)、舒张期血流丰富的动脉频谱；③具有鲜明丰富的滋养层周围性彩色血流频谱特征的&输卵管环&是早期输卵管妊娠的特征性表现，并提示是输卵管完整存在的标志。

Ve schizophrenic inpatients will be enrolled into the 6-week, randomized, double-blind trial of sarcosine monotherapy (1000~3000 mg/day, N=75) vs. risperidone (2~6 mg/d, N=75). We will measure clinical efficacy and side effects biweekly during the treatment. At the beginning and the end of the trial, we will also measure cognitive function (e.g. intellect, attention, memory, executive function), serum amino acids, expressions of mRNA (by realtime quantitative RT-PCR) and protein of NMDA-related genes (such as SHMT2, AMT, PSAT1, ASCT1, and serine racemase) in peripheral blood lymphocytes.

第一部份将收案150位未曾治疗之精神分裂症住院患者，以双盲方式随机给予六周sarcosine (1000-3000 mg/day，N=75)或risperidone (2-6 mg/day，N=75)治疗，我们将每两周评估临床疗效与安全性，并在研究开始及结束时，评量认知功能(智能、注意力、记忆力、执行功能)并测定血清中glycine或D-serine浓度以及SHMT2、AMT、PSAT1、ASCT1、serine racemase等基因於周边淋巴球之mRNA (以realtime RT-PCR测定)与蛋白质表现量。

On the basis of the working principle of double eccentricity mechanism the movement equation of seaming roller,when the guide rod was on different starting positions,was derived.

依据双偏心机构的工作原理，推导了导向杆在不同起始位时卷封滚轮的运动方程，总结了封罐机构参数的设计思路，为封罐机的设计提供了理论依据。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。