摘要：目的：研究慢性胃病患者口腔中是否存在幽门螺杆菌(Hp),并分析胃病患者牙周状况与幽门螺杆菌的关系。方法：依据特异的尿素酶C基因和cag A基因设计引物,建立聚合酶链反应(PCR)方法。检测65例慢性胃病患者不同牙位龈上和龈下菌斑中的Hp。结果：65例慢性胃病患者胃黏膜标本中,PCR检测阳性标本58例(89．3%),龈下菌斑Hp阳性率(47．7%),高于龈上菌斑中的Hp阳性率(26．2%)。牙周袋深度(PD)≥4 mm部位菌斑中Hp检出率显著高于PD＜4mm的部位(P＜0．05)。结论：口腔Hp是慢性胃病患者Hp感染的重要来源。

摘要：The focal problems of projection include out-of-focus projection images from the projector caused by incomplete mechanical focus and screen-door effects produced by projection pixilation. To eliminate these defects and enhance the imaging quality and clarity of projectors, a novel adaptive projection defocus algorithm is proposed based on multi-scale convolution kernel templates. This algorithm applies the improved Sobel-Tenengrad focus evaluation function to calculate the sharpness degree of intensity equalization and then constructs multi-scale defocus convolution kernels to remap and render the defocus projection image. The resulting projection defocus corrected images can eliminate out-of-focus effects and improve the sharpness of uncorrected images. Experiments show that the algorithm works quickly and robustly and that it not only effectively eliminates visual artifacts and can run on a self-designed smart projection system in real time but also significantly improves the resolution and clarity of the observer's visual perception.

摘要：The above-knee intelligent bionic leg is very helpful to amputees in the area of rehabilitation medicine. This paper first introduces the functional demand of the above-knee prosthesis design. Then, the advantages of the four-bar link mechanism and the magneto-rheological （MR） damper are analyzed in detail. The fixed position of the MR damper is optimized and a virtual prototype of knee joint is given. In the end, the system model of kinematics, dynamics, and controller are given and a control experiment is performed. The control experiment indicates that the intelligent bionic leg with multi-axis knee is able to realize gait tracking of the amputee＇s healthy leg based on semi-active control of the MR damper.

摘要：为提高并条机的生产效率,降低运维成本,减轻工人劳动强度,介绍并条机集中控制系统的控制原理及组成,从设计背景与意义、设备选型与硬件限制、设计应用实例及应用效果等方面,详细介绍了集中控制系统在并条机上的实物化应用。指出:并条机集中控制系统可实现对设备的实时控制,便于现场生产及管理人员把控生产状态,及时解决问题,为少人化、无人化的纺纱生产模式提供了技术支持。

摘要：在今天世界文化交流的舞台上,如何将中国元素与现代平面设计相结合,从而更好地展示我们独特的传统文化和民族个性,已经成为平面设计师们面临的重要课题。本文从中国传统文化构成元素中的中国书法、传统吉祥图案、民族色彩三方面,阐述中国传统元素在现代平面设计中的应用情况,探讨如何吸收传统文化元素,应用于现代平面设计之中,形成具有民族化特色的,中国式风格的现代设计理念。

摘要：在复杂的观测环境下,GNSS变形监测技术往往受遮挡和反射信号多路径影响,测量精度降低,限制了其在混凝土坝监测领域的应用推广。为了提高GNSS大坝监测精度,通过提取GNSS监测位移序列的多路径信号,构建大坝环境多路径延迟分布模型。基于外部精准监测数据,提出了顾及大坝动态变形的多路径时变误差补偿技术,实现顺河向位移的高精度监测,并应用于冶勒水电站实测精密位移装置GNSS监测中。结果表明:传统的多路径建模方法忽略了大坝自身变形所引起的影响,导致多路径改正模型产生偏差;所提出的多路径补偿技术克服了传统方法的上述不足,可显著提高顺河方向的监测精度。多路径建模过程中考虑大坝本身的变形量有利于提高GNSS监测精度,获取更客观的大坝位移监测结果。研究成果可为大坝安全监测提供参考。

摘要：Inhibition of VEGFR-2 signaling pathway has already become one of the most promising approaches for the treatment of *** this study,we describe the design,synthesis,and biological evaluation of a series of O-linked indoles as potent inhibitors of *** these compounds,18 showed significant anti-angiogenesis activities via VEGFR-2 in enzymatic proliferation assays,with IC50 value of3.8 nmol/L Kinase selectivity profiling revealed that 18 was a multitargeted inhibitor,and it also exhibited good potency against VEGFR-1,PDCFR-α and β.

摘要：针对光伏工程中水资源利用与污染、噪声污染、固体废弃物处理及局部生态系统破坏等主要环境问题,介绍了节能减排技术、资源循环利用及智能管理系统等绿色施工技术,并以新疆奎屯市100万kW光伏项目为案例,该光伏项目采用这些技术显著降低了施工过程中的碳排放、资源消耗和环境污染,成功实现了工程的可持续发展。

摘要：A compact interdigital H-mode drift-tube linac (IH-DTL) with the alternating-phase-focusing (APF) method, working at 325 MHz was designed for an injector of a proton medical accelerator. When fed in with a proper RF (radio frequency) power, the DTL cavity could establish the corresponding electromagnetic field to accelerate the ‘‘proton bunches’’ from an input energy of 3 MeV to an output energy of 7 MeV successfully, without any additional radial focusing elements. The gap-voltage distribution which was obtained from the CST■ Microwave Studio software simulations of the axial electric field was compared with that from the beam dynamics, and the errors met the requirements within ± 5%. In this paper, the RF design procedure and key results of the APF IH-DTL, which include the main RF characteristics of the cavity, frequency sensitivities of the tuners, and coupling factor of the RF power input coupler are presented.

摘要：Inhibition of VEGFR-2 signaling pathway is one of the most promising approaches for the treatment of cancer. In this paper, we reported the design, synthesis, and biological evaluation of a series of biphenylurea derivatives as VEGFR-2 inhibitors. Among these compounds, 39 exhibited potent inhibitory activity against VEGFR-2 both in vitro and in vivo. The antiangiogenesis activity of 39 was further confirmed by both tube formation assay and chick chorioallantoic membrane assay.