查询词典 hypothesis test

Then the listed companies having the corrections of accounting errors in the period from 1999 to 2004 were collected as research sample. Then the incidence which spurred the listed companies adjust errors in time was testified by methods of mean value test and multivariate linear regression. The major empirical results are summarized below: the inspection of The China Securities Regulatory Commission, other supervision outside and income quality correlated positively with it. The effect on profits correlated negatively with it. The hypothesis of the CPA firm change and assets-liabilities ratio didn't correlate with it.

然后选取了1999-2004年披露了会计差错更正的深沪上市公司作为研究样本，运用均值检验和Logistic回归方法考察了上市公司立即更正会计差错的动因，实证研究结果表明：证监会的检查、其他外部监管、收益质量与会计差错的立即更正正相关，损益影响程度与会计差错立即更正负相关，而事务所的变更假设和资产负债率假设未能通过显著性检验。

In order to test this hypothesis, we isolated and developed stable self-renewable cell lines of mesenchymal stem cells from human fetal articular cartilage and identified the cell phenotype by FACS and we found that their phenotypic markers were identical to those of mesenchymal stem cells from bone marrow.

我们从胚胎的关节软骨中获得成纤维样细胞，在体外进行培养和扩增，并用流式分析的方法对其表面标志进行鉴定，发现其表面标志与文献报道的骨髓来源的间充质干细胞的表面标志相同。

The empirical test results show that there is "expectation puzzle" in the test, long-term rates overact to the market shock, and so the expectations hypothesis cannot hold in China.

检验结果表明，我国利率期限结构的预期假设检验出现了"预期迷惑"现象，我国长期利率对市场冲击发生过度反应，利率期限结构预期假设不成立。

To test the four hypothesis,a positive study is conducted using the 93 private listed companies which are all listed before 2002 on China's A share market. Both the descriptive statistic analysis and regression test were carried out from two angles: direct control and indirect control.

为了对假设进行验证，我们整理选取了2001年年底之前在国内上市的93家纯A股民营上市公司为样本，以2002年至2004年为数据窗口，从直接控制和间接控制两个角度对其股权结构和经营绩效之间的关系进行了描述性统计和回归检验。

This paper focus on investigated the companies of logistics related industry in Taiwan, which implemented mobile commerce application before 2004. Questionnaire investigation was used to carry on census survey. A total of 90 questionnaires were distributed, and 81 effective samples were collected. In order to test hypothesis the simple regression analysis and t test was used. The main findings were listed as follow:(1) Mobile commerce application (included B2B, B2C and B2E) has significantly positive effect on corporate performance.

本研究以93年底已经导入行动商务的流通相关产业的企业为研究对象，以问卷调查方式进行普查，共发出90份问卷，回收有效问卷81份，以简单回归分析及t检定进行假说验证，结果发现：(1)行动商务应用（企业对企业、企业对顾客、企业对员工）对公司经营绩效有正向的影响效果。

This problem study way: study on the theories of composite ground and physical mechanics character of loessial soil, deduce a hypothesis and test it according to rules or regulations, analysis and prove the theory, design, test, application, examination, and summary.

本课题的主要工艺技术路线：研究黄土的物理力学性质及复合地基理论→与规范、规程相结合进行构思、假设和试算→理论推导与证明→设计→试验→实施→检验→总结。

To test the hypothesis, neontal rat cadiomyocytes Treat with heat shock(HS,42℃,2h) to induce the expression of HSP70,then teated with 0.5mmol/L H2O2. We first found H2O2 can reduced cadiomyocytes apoptosis and HSP70 only over-expression in the HS group, other two group only express HSP70 a little in the test of expression of HSP70.Then we tested the concentration of Ca2+, the [Ca2+ ] of CON was 192.224+6.654, the [Ca2+ ] of H2O2 group was 290.6918+8.922and the [Ca2+]of HS group was 214.2633+4.484.To further determine how HSP70 repaired the Ca2+ homestasis, we measured calcium transient of each group.

实验中应用MTT和流式细胞技术检测细胞的凋亡，发现损伤组的存活率明显低于其他2组，热休克组(Heat shock group，HS group)细胞存活率略低于正常组细胞；免疫组化结果表明只有在HS组才检测到阳性反应，即是HSP70的表达，其他2组均为弱阳性结果；应用离子成像技术对细胞内钙离子浓度进行测定，发现损伤组290.6918+8.922明显高于正常组192.224+6.654和HS组214.2633+4.484，HS组细胞内的钙离子浓度略高于正常组；为了进一步探讨HSP70对于ROS引起的心肌凋亡过程中钙离子的调控机制，又对各组的心肌细胞进行了钙瞬变的测定。

The aptitude and career interest were considered as the two dimension of the entrance guide system, and was proof-tested by the structural equation model, which results supported this two-dimension hypothesis. Accordingly, there were two parts in the guide system. One part was about the aptitude test, consisted of seven subtests: verbal reasoning, spatial imagining, mathematic reasoning, computer capacity, abstract reasoning, physical knowledge, and sentence recomposing. The other part was about the career interest test, including eight aspects: career longing, curriculum desire, entertainment after school, activity preference, job preference, work environment preference, self-estimate of one\'s abilities, and discuss future with someone else. After three times modification and testing, the psychometric indices of the guide system were become well and stable. Furthermore, the guide system was primarily launched into applying, with four typical case studies, the practicability and serviceability of the guide system was showed swiftly.The entrance guide system for junior high school students that was developed in this research was one-upping in the entrance guide field in China.

第二阶段是初中生升学指导系统的研制阶段，以能力倾向与生涯兴趣这二元因素作为初中生升学指导系统的基本架构，经验证性因素分析表明该二元架构是合理并可接受的；其中能力倾向部分共包含语言推理、空间想象、数学推理、电脑能力、抽象推理、物理知识、语句重组等七个分测验，生涯兴趣部分则包含生涯梦想、课程兴趣、课余爱好、活动偏好、工作内容喜好、工作场所喜好、能力自评、与他人讨论未来等八个方面；通过三次修改与测试，结果显示所研制的初中生升学指导系统有着良好的测量学指标；此外，通过对初中生升学指导系统的初步应用研究，并结合典型个案的深入剖析，进一步表明所研制的初中生升学指导系统具有实用性、操作性强的特点，所得结果也可靠可信。

To test the hypothesis that concentration polarization of atherogenic lipids may occur in the arterial system and play an important role in localization of atherosclerosis, we simulated and measured in vitro the luminal surface concentration of low density lipoprotein in local stenosis at the distal end of carotid artery by number simulation and laser scanning confocal microscopy, then we designed carotid stenosis model to test the role of LDL concentration polarization in atherogenesis.

低密度脂蛋白(low density lipoprotein， LDL)浓度极化可能是动脉粥样硬化局灶性的重要原因，本文以狭窄血管远心端为研究对象，探讨LDL浓度极化对动脉粥样硬化发生、发展的影响。

The core of test theory for a new generation of test is the combination of psychometrics and cognitive psychology, which is the key idea of the article .The article supposes there are four factors underlying response difficulty of Raven's Standard Progressive Matrices: figure complexity, figure format, transformation dimension, location factor. The hypothesis is tested by linear logistic latent trait model and proved to be valid.

本文在以认知和测量相结合为核心的新一代测验理论的指导下，从瑞文标准推理测验项目刺激特征的角度，对项目认知难度的影响因素进行了认知分析，提取出四个因素：图块繁简度、图块布局、变化维度、题序因子，结合线性逻辑斯谛克潜在特质模型对这四个因素进行了检验，证明提取出的四个因素是有效的。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。