长期趋势

Abstract］ objective to identify the relationship between serum homocysteine and carotid artery atherosclerosis in patients with cerebral infarction and effects of foliate,methylcobalamin.methods the concentrations of hcy were determined by means of fluorescence polarization immunoassay and carotid arteries was examined with color doppler ultrasound in 165 patients with cerebral infarction.the subjects were divided into 4 groups according to the severity of lesion of carotid artery.the concentrations of hcy were compared in different groups.the patients with hyperhomocysteinemia received foliate and methylcobalamin.results when lesion of carotid artery became severer,serum hcy was higher.the intima medial thicknesses of carotid artery were significantly decreased in patients with hyperhomocysteinemia who received foliate and methylcobalamin for two years.conclusion hyperhomocysteinemia may play an important role in development of carotid artery atherosclerosis.the intervention of foliate and methylcobalamin may reduce carotid artery atherosclerosis.

摘要］ 目的探讨脑梗死患者颈动脉病变与血清同型半胱氨酸水平的关系及叶酸、甲钴胺长期干预对其影响。方法对165例急性脑梗死患者进行血清hcy的测定及颈动脉超声检查，并按动脉硬化的程度分组，比较不同程度颈动脉粥样硬化患者hcy水平，部分高hcy血症患者给予叶酸、甲钴胺干预，随访2年。结果随着颈动脉病变程度的加重，血清hcy浓度呈上升趋势，高hcy血症干预者动脉内中膜厚度明显减小。结论高hcy血症对颈动脉粥样硬化的形成起重要作用，长期给予叶酸、甲钴胺干预可能减轻颈动脉粥样硬化。

Firstly, This paper processes geometry filtration based on character of orbit's apogee and perigee after orbit model is analyzed and based. Secondly Space Debris is separated into two kinds, coplanar and not coplanar according as location interrelation of target and debris. In Dynamic filtration's processing, considering prediction time limit and orbit perturbation, secular effects which have increaser effect is considered so that some need catching danger time point is appeased, some law about time when target and debris pass intersectant line each other is inferred, when debris and object are in different plane and some similar law also is inferred otherwise. The time list is arithmetical progression. These laws can improve calculation efficiency remarkably; Lastly orbit predict is a course approaching least distance. Danger time point in the last step become beginning time point from which debris and object's position and velocity are calculated by SXP4 Model which is an analytic model.By result, determine that relative movement trend is closer or apart, farther calculate the interval apart from time when predictive least relative distance occurs. Least relative distance and time when least distance occurs is calculated finally. It is a fast approach course adopting varied interval.

本文在分析、建立轨道摄动计算模型的基础上，首先采用基于轨道远、近地点特征对大量编目在册的空间碎片进行初步几何静态筛选，然后根据碎片与目标轨道面的相对位置特点把碎片分为异面与准共面两种情况以进行动态筛选，在筛选过程中考虑到预报时限长度和轨道摄动影响，引入了轨道摄动中具有积累效应的长期项以满足危险时间点的捕捉要求，利用了长期项摄动变化线性的特点导出了碎片与目标异面情况下各自过交线的时间序列成准等差数列的规律性和准共面情况下类似的规律性，从而显著地提高了前期轨道筛选的计算效率；最后对剩余危险碎片和目标飞行器利用SXP4轨道预报模型在前期轨道筛选的基础上以各个危险探测时间点为预报的时间起点，并根据预报计算结果，分析目标和碎片在该时间点的运动趋势是相互远离还是相互接近，推出预计最小相对距离发生时刻相对此刻的时间长度，得到其随时间变化的局部最小相对距离以及危险距离发生的时刻和相对速度，这是一个采用变时间步长、快速逼近最小相对距离的过程。

Generally, instrumental rumination helped to reduce negative mood, emotional-focused rumination worsened negative mood, and meaning-searching rumination increased the duration of negative mood. Moreover, in the period of severely and long-term negative mood status, instrumental rumination seemed to maintain the duration of positive mood, emotional-focused rumination still worsened negative mood, and meaning-searching rumination seemed to prolong the duration of negative mood. Besides, in the period of negative mood episode, instrumental ruminative had no effect on mood fluctuation, emotional-focused rumination deteriorated and extended negative mood, and meaning-searching rumination had harmful effect on the negative mood but still had borderline effect on the positive mood.

整体平均来说，功用性反刍有助於负向情绪的缓解、情绪焦点反刍会增强负向情绪感受、意义寻找反刍则是增加负向情绪维持的时间；若当天处在长期又严重情绪不佳日子中时，功用性反刍似有维持正向情绪的效用、情绪焦点反刍则是恶化当天的负向情绪强度、意义寻找反刍则有延长当天负向情绪时间的趋势；若连续处在长期且严重情绪不佳的日子中，功用性反刍对情绪变化并无影响、情绪焦点反刍则是延长且恶化此时期的负向情绪状态、而意义寻找反刍不但会影响负向情绪的状态，似也会有助於此时期的正向情绪状态。

A secular market trend is a long-term trend that usually lasts 5 to 25 years (but whose distribution is more or less bell shaped around 17 years, in the stock market), and consists of sequential 'primary' trends.

世俗的市场趋势是一个长期的趋势，通常为5至25年（但其分布是或多或少钟形约17年来，在股票市场），由连续的小学'的趋势。

Mr Tankard said:"But that is just an interruption to a downward trend, not a secular shift back to growth."

坦卡德说："但这只是黄金产量下降趋势的一个中断点，而不是要转变为长期上升趋势。"

Mr Tankard said: ldquo;But that is just an interruption to a downward trend, not a secular shift back to growth.rdquo

坦卡德说：ldquo；但这只是黄金产量下降趋势的一个中断点，而不是要转变为长期上升趋势。rdquo

As a result,the economic was stimulated and more fiscal revenue was gained by the government.Now our nation has stepped into the critical phase of the Eleventh Five-Year Plan,as the social market economic gets more and more mature,we can find a lot of aspects that unadapted to economic growth in extant tax structure.

本文将证明随着社会的进步，社会结构、经济结构都会相应的调整并趋于合理，税制结构的调整与完善作为经济结构调整的一部分，也必然要顺应经济结构调整的要求而不断趋于合理，当然在不断调整而趋于合理的过程中也可能出现某个阶段的不合理及负面效应，但这些不合理的阶段并不能改变税制结构越来越合理的大趋势，同样也就说明税制结构调整的长期效应为正，总的趋势是越来越合理、越来越适应经济发展的要求，能够更好的促进国民经济的稳定健康发展。

In practical projects, to meet the requirement for real time, continuous and long series dam safety monitoring data, a dam safety monitoring system needs to run continuously for a long time, and the data in the database will increase in quantity unboundedly.

问题描述在实际工程项目应用中，由于监测系统需要长期不间断运行，并且系统的观测数据要求长期保存，采集数据库中的数据量将呈无限增大趋势〔'一2」。

The results revealed the participant's scoring trend in confidence, dealing with pressure, and coachable behaviour were going up; however, the score in motivation and concentration were trending down. It might be the consequence of long-term training, and the participant was fatigued in mental and physical.

结果发现A选手在自信心、压力处理调适能力与可教导性方面能力上有进步的趋势；相对的在动机，专注力方面上有些许的下降趋势，有可能是因为长期集训，在心、生理上所产生的疲倦感影响。

Since 1991, China and Spain have built together two observation stations at Cueva and Timanfaga in the volcanic active region of Lanzarote Island, and carried out the dynamic monitoring and observation of crustal deformation and geothermal flow.

对合作研制的 2 9台监测仪器开展长期稳定实验，积累了大量观测资料和数据。初步分析表明：仪器运行良好，记录长期稳定可靠；Cueva站的仪器记录主要反映区域或全球地球物理环境或动力学效应，应变潮汐和倾斜潮汐的O1波、M2 波具有较高精度，显示火山目前活动微弱；Timanfaya站的仪器记录主要反映局部的火山活动信息，显示火山仍在活动但呈下降趋势。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐