摘要：At some point in the natural course of colorectal cancer up to 50% of patients will develop metastasis to the liver and it is one of the most critical effects for patient prognosis. The incidence of synchronous liver metastasis has been detected at around 20% - 25%, but the optimal timing of surgical resection remains controversial. Neoadjuvant chemotherapy has also been found to be beneficial not only for initially unresectable but also resectable synchronous metastases. Then, traditional surgical strategies of hepatic resection in accordance with past chemotherapeutic regimens have been used decreasingly over the past several years. This review will primarily discuss treatments in association with the recent developed chemotherapeutic regimens and surgical procedure from the clinical data and the concept for epithetlial-mesenchymal transition, which has recently been studied to elucidate mechanisms of the liver metastatic process.

摘要：Vocabulary poses a challenge to most English *** are some misconcepts and mismanagements in this *** view of the problems arising,this article makes particular points addressing the issues ***,it discusses the position of vocabulary in English language and some important notions concerning vocabulary ***,it examines the condition of learnt vocabulary in the mental space of ***,it proposes some useful strategies and approaches applicable to vocabulary learning process.

摘要：塔设备风诱导振动对卡门涡脱落及气动特性的影响规律研究对于塔设备共振预测和设计计算十分重要,对塔设备振动下的气动特性问题进行数值模拟研究。采用数值求解N-S方程结合transition SST湍流模型的方法模拟塔设备周围气流的非定常流动,获得塔外表面的风压系数分布,并结合试验数据验证了文中模拟方法的准确性;继而将塔设备振动简化为正弦运动,采用弹簧动网格技术实现网格动态生成。研究了塔设备振动频率以及振幅的变化对横向力系数、阻力系数和涡脱落频率等气动参数的影响规律,结合塔设备共振条件,指出了气动特性的改变对塔设备共振预测的影响规律。

摘要：针对传统Web设计,需借助JavaScript脚本或者Flash来实现动画效果的问题,CSS3新增了过渡、变形和动画属性,让动画特性实现得更加简单。文章依次介绍了实现动画的三个核心技术即过渡(transition)属性、变形(transform)属性和动画(animation)属性,并在此基础上以立方体盒子的展开与旋转效果为例,从效果描述、结构分析、样式分析、制作页面结构、定义CSS样式这五个方面具体阐述了基于CSS3动画效果的实现过程。基于HTML5+CSS3的动画效果的实现大大提高了网页开发的效率,大幅度提升了用户的体验感。

摘要：遥感图像的场景分类旨在将包含多个地面对象的子区域分为不同的类别,是城市规划和土地资源管理等应用中重要的技术基础。文章采用一种基于Densenet-SVM的遥感图像场景分类网络,它由特征提取模型、特征映射模型和分类模型三个部分构成。文章使用了三个DenseBlock,其中包含六个稠密连接层与两个transition结构交替,为提取滑坡因素的深度特征,从浅到深每个密集块的膨胀率设置为5、2和1,并设计全局池化和稠密层作为特征映射部分。最后,基于支持向量网络方法完成遥感图像场景分类,将AID数据集中的图像调整为288×288像素作为输入完成实验,将批次大小设置为16,并使用具有动态学习率功能的随机梯度下降法作为优化算法。

摘要：近年来,智能可穿戴电子产品开始走入我们的日常生活,同时也极大地激发了研究者们对柔性能源的研究兴趣.以过渡金属二硫族化合物为代表的新兴二维材料表现出了优秀的光电和机械性能、高的理论比容量等性质,使其在柔性能源存储和转换领域备受关注.相比于零带隙且比容量低的石墨烯或者硅等传统材料,这些新兴的二维材料在构筑柔性光电器件及二次电池方面具有良好的应用前景.本文综述了新型二维材料在二次电池、超级电容器、太阳能电池、光电探测器和纳米发电机等柔性能源应用领域的突破性进展.虽然目前这个新兴领域仍面临众多问题,但是通过结构与材料的设计与优化,有望在不久的将来逐步得到解决.我们相信这些新兴二维材料的应用将显著提高柔性能源器件的性能,并推动可穿戴电子产品在我们日常生活中的普及.

摘要：Three dual-mode band-pass filters are presented in the present paper. The first filter is realized by dual-mode substrate integrated waveguide (SIW) cavity;the second is based on the integration of SIW cavity with electromagnetic band gap (EBG);and the third is based on the integration of SIW cavity with complementary split ring resonator (CSRR). The dual-mode SIW cavity is designed to have a fractional bandwidth of 4.95% at the midband frequency of 9.08 GHz;the proposed EBG-SIW resonator operates at 9.12 GHz with a bandwidth of 4.38% and the CSRR-SIW resonator operates at 8.66 GHz with a bandwidth of 2.54%. The proposed filters have the high Q-factors and generate a transmission zero in upper stopband, and these by the use of Rogers RT/duriod 5880 (tm).

摘要：全球第一款飞行汽车一家总部位于美国马萨诸塞州的飞行汽车公司近日进行了首次公开飞行测试,航空爱好者可以观看本次飞行汽车的演示飞行。这辆飞行汽车被命名为transition,由美国的飞行汽车制造商设计建造,其将在2015年上市,成为世界上第一款投入商业运营的飞行汽车。根据特拉弗吉亚公司公布的设计方案,飞行汽车外观上和普通的汽车差别不大,但是增加了机翼等升力结构。

摘要：本文简要介绍了Deltav系统的顺序控制图表,并根据生产需要,详细介绍了日期模块的设计思路和过程。实践证明运行稳定可靠,满足了经济考核和成本核算的要求。