如果内部表没有索引,那么数据库服务器就会将在表上构建索引的成本与连续扫描的成本进行比较,然后选择成本最低的那一种方法。
If the inner table does not have an index, the database server will compare the cost of building an index on the table to the cost of a sequential scan, and will choose the one with the least cost.
与浏览器的这种集成相对来说比较简单,使用这种方法把站点集成到用户的桌面中是很不错的选择。
That kind of integration with the browser, which is relatively easy, is a great way to integrate your site more closely into the user's desktop.
在此基础上,分析比较当前过程系统的分析与模拟方法,根据锅炉热力系统的特点选择合适的过程分析模拟方法。
On the condition of it, choose an appropriate process analysis method for boiler thermal system, after comparing the present simulation methods of process-system.
与已有的方法比较,本文的方法提高了极点选择的稳定性,适用于复杂的互连网络。
Compared with other methods, stability of selecting poles can be improved by the proposed method. Therefore, it is useful for complicated networks.
结论:检测限预测系统操作快速、简便,有利于方法的比较与选择。
Conclusion: the forecasting system of limit test is quick and simple to handle, and favours the methods comparison and selection.
对原子吸收法与等离子光谱法在水质检测中的优缺点进行比较,对于如何根据具体情况选择适当的分析方法进行了探讨。
This paper introduced research that how to choice suitable analysis method according to actual situation after compared the advantage and defect of water quality determined with AAS and ICP.
论述了用比较法检定氧化锆探头时,标准氧化锆探头的选择与实现其高精度测量的方法。
How to select standard zirconia oxygen probes to achieve high precision measurement when testing zirconia probe with comparative method is described.
本文提出了一种通过对决策方案风险价值与风险费用的计算和比较来评价选择方案的方法。
In this paper, we propose a method of appraisal and selection alternative by calculating and comparing the risk value and risk cost of the alternative.
方法选择运动试验阳性患者100例与CAG情况进行分析比较以便提高临床诊断符合率。
Methods Choose 100 positive patients of exercise test and compare them with the cases of coronary angiography (CAG)so as to raise the rate of conformity in clinical diagnoses.
方法 选择有头部CT影像学检查的小脑出血患者 6 0例 ,对其出血部位及出血量与预后的关系进行比较分析。
Methods To select 60 patients with cerebellar hemorrhage diagnosed by cranial CT imaging and analyze comparatively their bleeding locations and volumes related to prognosis.
方法选择AMI患者行早期心脏康复程序,与常规护理的结果做比较。
Methods AMI patients with early cardiac rehabilitation program, and compared the results of routine care patients.
本文比较有创造性的研究在于:在DCF与EVA的比较过程中,按照企业所处不同的成长周期,提出了不同评价指标的选择方法;
The creative research of this paper lies in, it have put forward different evaluation index choice methods of DCF and EVA according to different growth cycle of enterprises;
本文对多目标综合评价的若干问题进行了系统的分析与比较,得出了一些重要结论,如导致评价结果敏感性的主要因素及评价方法的选择标准等等。
In this paper, author analysis some issues of Multiple Objective assessment, and draw some important conclusions such as key factors leading to sensitivities of assessment result etc.
方法:5 6例复发性肱骨外上髁炎随机选择“改良火针”与温针灸治疗,比较两组疗效。
Method:56 cases of relapse of external humeral epicondylitis were distributed into fire needle group and warming needle group randomly and effects of both groups were compared.
然后将该方法与基于GA的SVM模型选择方法进行了比较。
This method is compared with SVM model selection method based on GA method.
目的 比较应用镶嵌式骨外固定器与带血管腓骨移植治疗先天性胫骨假关节(CPT)的临床疗效,为临床合理选择治疗方法提供依据。
Objective To explore the clinical efficacy and experience of fibula flap transplantation and external fixation devices for congenital pseudarthrosis of tibia(CPT).
目的 比较应用镶嵌式骨外固定器与带血管腓骨移植治疗先天性胫骨假关节(CPT)的临床疗效,为临床合理选择治疗方法提供依据。
Objective To explore the clinical efficacy and experience of fibula flap transplantation and external fixation devices for congenital pseudarthrosis of tibia(CPT).
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