查询词典 algebraic expression

The expression sequence is then evaluated by code in the AXParser class to produce an Expression object that represents the input algebraic expression by means of a tree of Expression objects.

表达序列然后评估在AXParser类中的代码产生一个表达的对象，表示输入了一个对象树的表达方式代数式。

HP positive groups was compared with HP negative groups in gastric mucosal lesions, expression of P16 in HP positive groups was lower than that in HP negative (P＜0.01), expression of CD44V6, PCNA and C-met in HP positive groups were all higher than those in negative groups (P＜0.01). Expression of P16 was negative correlated with expression of CD44V6, PCNA and C-met in HP-infected gastric mucosal lesions (r〓=-0.6971, P＜0.01; r〓=-0.4811, P＜0.01; r〓=-0.6075, P＜0.01); Expression of CD44V6 were positive correlated with expression of C-met and PCNA (r〓=0.6550, P＜0.01; r〓=0.4977, P＜0.01). Selenium level in HP-infected gastric mucosal was Significantly higher than normal and the level will fall with deteriorism of gastric mucosal lesions.

临床标本研究结果表明：在系列胃粘膜病变中，P16表达HP阳性标本显著低于HP阴性标本（P＜0.01）；CD44V6、C-met、PCNA表达HP阳性标本均显著高于阴性标本（P＜0.01）；在HP感染的胃粘膜病变组织中，P16表达与CD44V6、C-met、PCNA表达均呈负相关（r〓=-0.697l，P＜0.01；r〓=-0.4811，P＜0.01；r〓=-0.6075，P＜0.01）；CD44V6表达与C-met、PCNA表达相互呈正相关（r〓=0.6550，P＜0.01；r〓=0.4977，P＜0.01）；HP感染的胃粘膜病变组织硒含量明显升高，并随胃粘膜病变程度加重相对降低，但高于正常组织；硒含量分别与CD44V6、C-met、PCNA表达阳性率呈负相关（P＜0.05），而与P16表达阳性率呈正相关（P＜0.05）。

Then the spatial index is constructed which includes not only the external approximate expression but also interior approximate expression of spatial object and is extended from tranditional index only with external approximate expression. The index structures of MR-tree and MRD-tree based on multi-approximate expression are set up with the prototype index of R-tree, and the relevant algorithms about the index of insertion, deletion and search are provided. Then, the efficiencies of constructing index based on the multi-approximate expression and window range query are analysised and compared. In addition, the several algorithms and efficiency of soving the maximum enclosed circle and maximum enclosed rectangle are discussed and analyzed during constructing index based on multi-approximate expression.

首先，论文讨论了空间数据的特点、空间数据库的关键技术以及空间对象间的拓扑、距离以及方向关系，分析了空间对象的外部和内部近似表达，然后将传统索引中只利用空间对象的外部近似扩展为既有空间对象的外部近似又有空间对象的内部近似，即以空间对象的多重近似来构建索引，并以R-tree为索引原型构建基于多重近似的MR-tree和MRD-tree索引结构，然后给出了相关索引的插入、删除及查找算法，并通过实验比较分析了基于多重近似索引与基于外部近似索引的构建效率及窗口范围查询效率。

In the experimental tectum, the expression of GFAP in the right SO was higher than the expression of GFAP in the left SO during 1d-60d after after optic nerve damage. The expression of GFAP in the right SO was familiar with the expression of GFAP in the left SO during 85d after optic nerve damage, but the expression of GFAP in SO in the experimental tectum was higher than that in the normal tectum. The result of GFAP expression in the experimental retina and tectum showed that AStrocyte took part in the optic nerve regeneration and it might play an important role in optic nerve regeneration accidents.

在损伤1d后视网膜的神经纤维层和外核层外缘可见较为深的GFAP染色，在损伤3d后视网膜从内网层经内核层至外网层出现稀疏的垂直于视网膜长轴分布的线条状GFAP染色，随时间推移，伤后5d、7d、14d、28d上述染色进一步加深密集，到伤后60d和85d上述染色减弱，阴性对照的视网膜各层未见GFAP阳性染色；(5)正常鲫鱼视顶盖中在SO层内有较浅的黄棕色线条状GFAP染色，在SFGC层

The percentage of TGF-β〓 positive cell in the pancreatic cancer tissue (43.8±5.2)％ was significantly higher than that in adjacent pancreatic tissue (28.7±3.6)％, P＜0.05. The worse the cancer cells differentiated and lymphy node metastasis, the more over-expression of TGF-β〓. 2. The percentage of Tr positive cell in the pancreatic cancer tissue (41±4)％ was significantly higher than that in adjacent pancreatic tissue (23±3)％, P＜0.05. The worse the cancer cells differentiated and lymphy node metastasis, the more over-expression of Tr, but the expression of Tr protein was not correlated with lymphy node metastasis (P＞0.05). 3. The percentage of β-GCD positive cell in the pancreatic cancer tissue (62.5± 4.1)％ was significantly higher than that in adjacent pancreatic tissue (33.5±2.8)％, P＜0.05. The worse the cancer cells differentiated and lymphy node metastasis, the more over-expression of β-GCD in pancreatic cancer tissue, but the expression of β-GCD protein was not correlated with lymphy node metastasis. P＞0.05. 4. the expression of β-GCD was significantly correlated with TGF-β〓 and Tr in the pancreatic cancer tissue.

结果如下：1、胰腺癌组织TGF-β〓阳性细胞百分率(43.8±5.2)％明显高于癌旁胰腺组织(28.7±3.6)％，P＜0.05；且癌细胞分化愈差或有淋巴结转移TGF-β〓过度表达愈多。2、胰腺癌组织Tr阳性细胞百分率(41±4)％，明显高于癌旁胰腺组织(23±3)％，P＜0.05；且不同分化程度胰腺癌组织Tr表达强度不同，分化程度愈低，表达强度愈高，P＜0.05；但胰腺癌Tr表达强度与淋巴结是否转移无关，P＞0.05.3、对于胰腺癌组织TGF-β〓和Tr表达，检测胰腺癌组织(32例)β-GCD阳性细胞百分率分别为(62.5±4.1)％或(62±4)％，分别明显高于癌旁胰腺组织β-GCD阳性细胞百分率(33.5±2.8)％或(43±3)％，P＜0.05；不同分化程度胰腺癌组织β-GCD表达强度不同，分化程度越低，表达强度越高，P＜0.05；但胰腺癌组织β-GCD表达强度与淋巴结是否转移无关，P＞0.05.4、TGF-β〓、Tr和β-GCD在胰腺癌组织中的表达随着分化程度的改变，呈现一致性的关系，而且TGF-β〓与淋巴结转移有关，Tr和β-GCD与淋巴结是否转移无关。

Down-regulated expression of PTEN and up-regulated expression of VEGF〓 were considered as two important events in tumorigenesis of ovarian cancer and could act as molecular markers to indicate the pathobiological behaviors of ovarian cancer. Decreased PTEN expression and increased VEGF〓 expression were closely associated with tumorigenesis and pathobiological behaviors of ovarian endometrioid and serous cancer respectively. Reduced expression of PTEN gene might be involved in carcinogenesis and progression of ovarian cancer by up-regulating the VEGF〓 expression to enhance angiogenesis.

在卵巢癌组织中PTEN基因mRNA表达下调和VEGF〓基因mRNA表达上调是卵巢癌发生的重要分子事件，可作为反映卵巢癌病理生物学行为的指标，且分别与卵巢内膜样癌和浆液性囊腺癌的发生和病理生物学行为关系密切；PTEN基因mRNA表达降低可能通过上调VEGF〓基因mRNA表达促进新生血管形成，进而参与卵巢癌的发生和侵袭。

For preparing for the researches of text digital watermarking and advantaging other researchers" development when using the Chinese mathematical expression theory, this paper designs and realizes a development platform of Chinese mathematical expression. It has been proved by experiments that the platform"s function, execution speed and stability can satisfy the requirements of conversion and operation of enormous data.This research found out that the structure information of Chinese have plenty redundant information that can be used by the Chinese mathematical expression for the digital watermarking, the data embedded can possess better robustness. Based on this finding, this paper designs a kind of text digital watermarking method of embedding watermarking by using Chinese structure, and realizes the method by using the Chinese mathematical expression platform.Considering the watermarking embedding algorithms importance to the robustness of the text digital watermarking, this paper makes fully use of the advantage of the Chinese mathematical expression theory to design a kind of layered text method, which has being realized by using the Chinese mathematical expression platform. The layered text method can handle the text as a solid structure, and the embedding data havepreferable robustness.Finally, based on the researches of the text digital watermarking method and the text layered method, this paper integrates the method of making use of the Chinese structure embedding watermarking with the robust algorithm based on text layered, and realizes a brand-new text digital watermarking method. Proved by lots of experiments, this brand-new method has good robustness and better invisibility.

为了为研究工作做准备和方便其他使用汉字数学表达式理论体系的人进行开发，本文基于汉字数学表达式理论设计实现了一个汉字数学表达式平台，实现了Unicode汉字集中的汉字、汉字数学表达式、汉字的Unicode码之间的相互转化、依据汉字数学表达式提取汉字的结构信息、由汉字数学表达式在非中文平台上不依赖字库显示汉字的图像等功能，使用复合文档技术和流压缩技术进行数据的存储，使用对汉字数学表达式进行二叉树拆分来处理汉字数学表达式中包含的信息，使用自定义哈希函数来提高运行速度，实验证明，该平台功能、速度和稳定性完全能满足大量数据的转化和运算要求；通过研究表明汉字的结构信息中存在大量可使用汉字数学表达式理论加以利用的水印加载空间，加载在该空间的数据可以具有较好的鲁棒性，基于此，本文设计了一种利用汉字结构加载水印的文本数字水印方法，并使用汉字数学表达式平台将其实现；由于水印嵌入算法对于文本数字水印的鲁棒性至关重要，本文充分利用汉字数学表达式理论的优点，设计了一种文本分层的方法，并使用汉字数学表达式平台将其实现，使文本成为一个立体的空间，使嵌入在其中的数据具有更好的鲁棒性；最后在基于汉字数学表达式的文本数字水印嵌入方法的研究和基于汉字数学表达式的文本分层方法的研究的基础上，结合利用汉字结构嵌入水印的方法和基于文本分层的抗攻击文本水印嵌入算法实现了一种全新的文本数字水印方法，经实验证明，该方法有良好的鲁棒性和较好的隐蔽性。

In addition, MVD value was positively correlated with the expression level of MMP-9 and Integrin beta-3 mRNA (P＜0.05). The five year survival rate of patients with positive mRNA expression and mean MVD value≥39.5/mm2 were significantly lower than those of patients with negative mRNA expression and mean MVD value＜39.5/mm2; The expression of MMP-9 was significantly corelated with the expression of integrin β3 (P＜0.05). Conclusion The expression of MMP-9 and Integrin β3 can promote tumor angiogenesis and contributes to tumor invasion and metastasis in gastric carcinoma.

结果 MMP-9和Integrinβ3 mRNA 阳性表达率分别为58.10％和60.95％，其阳性表达与胃癌生长方式、浸润深度、脉管侵犯、淋巴结及远处转移均密切相关（P均＜0.01）； MMP-9、Integrin β3 mRNA 的阳性表达病例的平均血管数均高于阴性表达病例的平均血管数（P均＜0.05）；MVD值分别与MMP-9和Integrin β3 mRNA的表达水平呈正相关（P均＜0.05）； MMP-9和Integrinβ3 mRNA的阳性表达以及MVD值≥39.5病例的5年生存率显著低于阴性表达和MVD 值＜39.5的病例；MMP-9和Integrin β3 mRNA表达存在显著相关性（P＜0.05）。

The summary results are below:1. GUS expression under the driving of the BjCHI1 promoter (-1060/+17) was essentially undetectable in the young seedlings under normal growth conditions. GUS activity was first detected in the stigma of young flowers, peaked in the young siliques, and decreased when the siliques became older. No GUS expression was found in the mature siliques, seeds or root.2. The BjCHI1 promoter (-1060/+17) was inducible by NaCl, PEG, wounding and MeJA treatments. High levels of GUS expression were detected in the transgenic tobacco and Arabidopsis plants after wounding, NaCl, PEG, and MeJA treatment, indicating that the BjCHI1 promoter responses to both biotic and abiotic stresses.3. RT-PCR analysis confirmed that the expression of the BjCHI1 gene in B. juncea was inducible by PEG and NaCl.4. The transcription start site was determined by 5′-RACE, and was located at the 17th nucleotide upstream of the translation initiation codon of the BjCHI1 gene.5. A -805/+17 promoter fragment was enough to response to wounding and MeJA induction, which was proved in transgenic tobacco and Arabidopsis plants. The 397 bp region between -805 and -409 of the BjCHI1 promoter contains a cis-acting element that is essential for the wounding and MeJA inducibility.6. The -695/-620 region was necessary but not sufficient to confer MeJA-responsive expression. A T/G-box locates in -353 play an important role in the expression of the BjCHI1 gene in response to MeJA treatment. The 76 bp region is coupled with the T/G-box to confer full MeJA-inducible transcription of the BjCHI1 gene.

主要结果如下：1、利用转基因拟南芥植株分析表明，正常生长条件下，BjCHI1启动子(-1060/+17)驱动GUS基因主要在花柱中表达，幼嫩的荚也有表达，并随着果荚的成熟而减弱，成熟的果荚、种子和根没有显示GUS活性。2、BjCHI1启动子(-1060/+17)能驱动GUS基因在转基因烟草和拟南芥中响应伤害的诱导，转基因拟南芥的分析还证明BjCHI1启动子也受MeJA、NaCl和PEG的诱导，证明BjCHI1启动子是一个伤害、MeJA、NaCl和PEG等生物和非生物因素诱导启动子。3、RT-PCR进一步证明芥菜中BjCHI1基因也受NaCl和PEG的诱导表达。4、5′-RACE法鉴定了BjCHI1启动子的转录起始位点，位于翻译起始位点ATG上游第17个碱基A.5、转基因烟草和拟南芥分析证明，-805/+17的启动子片段足以响应伤害和MeJA的诱导，-805和-409之间397 bp的启动子片段含有对伤害和MeJA诱导必要的元件。6、本明烟叶片瞬时表达系统分析证明，一段76 bp的序列(-695/-620)对BjCHI1启动子响应MeJA的诱导是必要的，但不足以响应MeJA的诱导，位于-353的T/G-box也参与MeJA的诱导。76 bp的序列(-695/-620)与T/G-box协同起作用，赋予BjCHI1启动子MeJA诱导性。

When aborted rats in group E were treated with the dose of 50 IU/g IFN-γ, expression of TNF-αin this group was compared with the other four groups, the results were as follows: Compared with group A, the nucleus pre-opticus medialis, nucleus pre-opticus mango celluaris, nucleus periventricularis hypothalami, nucleus ventromedialis hypothalami, nucleus dorsomedialis hypothalami, nucleus arcuatus hypothalami and pars intermedia had a highly expression of TNF-α, in the other nuclei of hypothalamus, neurohypophsis and adenohypophysis, the change was not significantly, the expression of TNF-αin follicle and corpus luteum were decreased distinctly, the variation in uterus was slight and no difference was exsited; Compared with group B, the expression of TNF-αin nucleus nucleus lateralis hypothalami, nucleus ventromedialis hypothalami, nucleus arcuatus hypothalami, adenohypophysis and uterus presented a remarkable enhancement, conversely, the TNF-αexpression in the nucleus pre-opticus medialis, nucleus pre-opticus suprachiasmaticus, nucleus supra-opticus, nucleus pre-opticus mango celluaris, nucleus periventricularis hypothalami, nucleus paraventricularis hypothalami, neurohypophsis, follicle and corpus luteum had been significantly decreased; Compared with group C, the nucleus pre-opticus medialis, nucleus ventromedialis hypothalami, nucleus dorsomedialis hypothalami, nucleus arcuatus hypothalami, adenohypophysis, pars intermedia and uterus had upregulated the expression of TNF-α, however, it was decreased in the nucleus periventricularis hypothalami and corpus luteum; When compared with group D, the expression of TNF-αin nucleus lateralis hypothalami, nucleus dorsomedialis hypothalami, nucleus ventromedialis hypothalami, pituitary, follicle and ovary stroma were obviously enhanced, while in the nucleus supra-opticus and nucleus arcuatus hypothalami, the situation was definitely opposite, in the other parts, the change was not significant.

外源腹腔注射50 IU/g IFN-γ后，同A组相比：E组TNF-α免疫阳性产物在下丘脑视前内侧核、视前大细胞核、室周核、腹内侧核、背内侧核、弓状核、垂体中间部显著增高，在下丘脑其它核团、神经垂体、垂体前叶较A组差异不显著，在卵泡、黄体中阳性产物表达均较A组显著降低，在子宫中表达较A组变化不明显；同B组相比：E组TNF-α免疫阳性产物在下丘脑外侧核、腹内侧核、弓状核、垂体前叶、子宫均显著增高，在视前内侧核、视交叉上核、视上核、视前大细胞核、室周核、室旁核、神经垂体、卵泡、黄体中阳性物质表达均显著降低；同C组相比：E组下丘脑视前内侧核、腹内侧核、背内侧核、弓状核、垂体前叶与中间部、子宫均显著增高，在室周核、黄体中均显著降低；同D组相比：E组下丘脑外侧核、背内侧核、腹内侧核、垂体各部、卵泡、卵巢基质均显著增高，在视上核、弓状核显著降低，在其它部位表达变化差异不显著。

Salt is good, but if the salt becomes flat and tasteless, with what do you season it?

14：33 盐本是好的，盐若失了味，可用什么叫它再咸呢？

He reiterated that the PLA is an army of the people under the leadership of the Communist Party of China.

他重申，人民解放军是在中国共产党领导下的人民军队。