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：Theoretical calculations predict transition frequencies in the terahertz range for the field-effect transistors based on carbon nanotubes, and this shows their suitability for being used in high frequency applications. In this paper, we have designed a field-effect transistor based on carbon nanotube with high transition frequency suitable for ultra-wide band applications. We did this by optimizing nanotube diameter, gate insulator thickness and dielectric constant. As a result, we achieved the transition frequency about 7.45 THz. The environment of open source software FETToy is used to simulate the device. Also a suitable model for calculating the transition frequency is presented.

摘要：A two-dimensional panel in subsonic flow with stochastic excitation is studied by assuming that the aerodynamic pressure contains random pressure *** on the global properties,the sensitivities of system parameters and noise intensities are ***,the parameter region with multiple coexisting attractors under different dynamic pressures is *** is found that the coexistence of multiple attractors extensively appears and the basin structure may be *** the periodic time history diagrams are calculated by simulating the random pressure fluctuation as Poisson white *** results show that under typical bistable conditions,the noise sensitivity of the subsonic panel system is related to the basin structures and the disposition of the coexisting attractors to the *** transition between two attractors diffuses along the unstable manifold and tends to the position where the basin boundary curvature is relatively *** findings underscore the importance of global analysis in assessing the noise load carrying capacity,which provides some valuable insights into the safety design of subsonic panel systems.

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：The Awakening written by Kate Chopin is published for a long time,which stirs up streams of praise for its bold *** researchers make analysis on this novel from different perspectives including postmodernism,deconstruction,feminism,binary opposition,and so *** on the“Maslow’s Hierarchy of Needs”,this paper lays emphasis on the transition of protagonist Edna from suffering the traditional shackle to pursuing the *** paper aims to help readers realize an awakening process of Edna and appeals for more concern on the transformation of females’roles.

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：Newborn two-dimensional materials(NB2DMs) beyond graphene such as transition metal dichalcogenides(TMDs) exhibit excellent optoelectronic and mechanical properties as well as high theoretical specific capacity, which make them become the promising building blocks of flexible energy devices related to energy conversion and storage. Compared to graphene with zero band gap or traditional friable materials such as Si, these NB2 DMs are more suitable to construct flexible devices as active layers of optoelectronic devices or as active materials for batteries. The present review focuses on the recent advances in bendable energy devices based on NB2 DMs, including batteries, supercapacitors(SCs), solar cells, photodetectors and nanogenerators(NGs). The NB2 DMs pave a new way to construct next-generation flexible energy devices with improved performance and we believe that those devices will be seen in our daily life and change our lifestyle in the immediate future.

摘要：应对飞机和汽车行业所面临的轻型汽车设计挑战,拓宽进入普通航空业的渠道。Terrafugia公司选择SolidWorks专业3D软件,来设计其适于行驶的飞机,同时集成Simulayt的CATIA Composites Design解决方案,来优化复合材料的接合,以实现强度和耐久性的最大化和最轻的重量。

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。