摘要：In FLAC ^(3D),cable element or modified pile element can be used to build slope anchoring ***,the difference between the two structural elements and their influence on the calculation results have not been studied in *** order to solve this problem,the Xiashu loess slope anchoring models based on cable element and modified pile element were constructed respectively.A variety of anchoring schemes were designed by orthogonal experiment method,and then they were brought into the model for calculation and the calculation results were analyzed by range analysis and variance *** results show that the modified pile element can bear the bending moment and reflect the strain softening property of the *** the perspective of slope safety factor,the anchorage length and anchor bolt spacing are the main factors affecting the stability of the slope,and the anchorage angle is the secondary *** grout in cable element is assumed to be an elastic-perfectly plastic material,so the safety factor of the slope can be significantly increased by increasing the length of the anchor *** will bring potential risks to the slope treatment ***,in the calculation of the slope anchoring model,the modified pile element is more suitable for simulating the anchor bolt.

摘要：本文应用移动边界法(MB)对冷凝器建立了动态仿真数学模型,模型体现了冷凝器内各个相区长度随时间的变化,模型最终可以化为常微分线性方程组的形式,在求解上更为方便且兼顾了仿真的效率和精度,模型可提供冷凝器详细的性能参数;研究了在系统不同的控制参数阶跃情况下冷凝器的动态响应,获得了冷凝器的动态特性,冷凝器的动态特性是冷凝器动态优化设计和编制系统控制规律的基础。本文中的冷凝器建模方法适合于系统级仿真研究。

摘要：目的用低剂量内毒素诱导兔非显性弥散性血管内凝血,观察凝血、纤溶变化及肝素抗凝治疗的效果。方法12只雄性新西兰兔按完全随机设计方法分为内毒素组和内毒素加肝素治疗组,每组6只,采用内毒素10μg/kg由颈内静脉注入,其中肝素组在注入内毒素同时加用肝素100U/kg抗凝治疗。以实验前样本作自身对照,实验后1、2、3、6h分别采取静脉血进行凝血酶原时间(PT)、活化部分凝血酶原时间(aPTT)、凝血酶时间(TT)、纤维蛋白原(Fib)含量及D-二聚体含量测定、血栓弹力图(TEG)各参数变化以及肺、肾脏病理改变。结果内毒素组PT、aPTT、TT均延长,Fib含量降低,D-二聚体含量明显增加,TEG示凝血因子消耗、血小板减少,肺、肾内有微血栓形成;肝素组凝血象变化不明显,D-二聚体含量有增加,TEG示轻微低凝状态,肺、肾内未见微血栓形成。结论低剂量内毒素能诱导兔非显性弥散性血管内凝血,且抗凝治疗有效。

摘要：在我国票据市场引入做市商制度,可以起到稳定市场价格、活跃市场交易、提高市场运行效率以及辅助央行开展货币政策调控等作用。建立票据市场做市商制度,要设计有效的做市商运行机制,搭建票据做市业务系统平台,加大政策支持,落实做市商权利,建立做市商分层体系,同时完善做市商考核约束和信息披露机制。

摘要：采用正交设计试验法对女贞子(Ligustrum lucidum)中黄酮类化合物的提取工艺进行了优化选择,以料液比、提取时间、提取温度、乙醇体积分数这4个因素设计3水平正交试验L9(34)。根据正交分析结果,确定女贞子中黄酮类化合物在90℃水浴条件下料液比为1∶40(g∶m L),用30%乙醇提取100 min为最佳提取工艺,在此条件下,总黄酮提取率可达5.16%,且4个因素对提取率的影响分别为温度>料液比>时间>乙醇体积分数。

摘要：Full-in-cell(FIC)产品信号线SD层结构为Mo-Al-Mo结构,使用Reactive Ion Etching(RIE)模式干法刻蚀设备进行N+Etch时,氯的化合物会吸附在信号线中的Al线侧壁及光刻胶的表面,当玻璃基板离开刻蚀腔体接触到空气,遇到水分发生水解反应,对Al线造成腐蚀,严重影响产品特性。本文在RIE刻蚀模式腔体内采用刻蚀条件变更改善Al腐蚀现象,通过对刻蚀的前处理步骤,后处理步骤以及去静电步骤的参数包括压强、功率和时间以及气体流量比进行实验设计并对数据进行分析。实验结果表明当后处理步骤2 000 W,O_2/SF_6比例为2 000mL·min^(-1)/50mL·min^(-1),压强为200mt(1mt=0.133Pa),Time为15s为最优条件,可以彻底改善Al腐蚀现象。此条件TFT特性方面更加优越,Dark I_(on)为1.91μA,Photo I_(off)为4.1pA。

摘要：在电力电子化程度逐渐增加的电力系统中,构网变流器由于能够自主建立机端电压和频率的特性被广泛研究。其中,无内环的构网变流器因其电压源特性较好、控制结构简单而应用较广。然而,无内环变流器在面临系统阻尼较弱情形时容易进入低频振荡。为提高无内环变流器的并网低频稳定性,文中利用复转矩系数分析方法,揭示了无内环构网变流器的低频失稳机理为常值虚拟阻抗在低频区间无滞后特性,故而难以提供系统低频阻尼转矩,且虚拟阻抗增加会引起无功环路的负阻尼增大。针对常值虚拟阻抗策略在面临扰动时所提供低频阻尼转矩不足的问题,提出基于低通滤波器的虚拟阻抗策略以增加阻尼转矩进而抑制低频振荡。最后,通过MATLAB/Simulink仿真以及StarSim半实物实验验证了所提低通虚拟阻抗策略的有效性。

摘要：以某溢流补油阀为基础进行高压化结构设计,建立高压溢流补油阀三维模型,利用CFD软件分析阀内部流场的速度分布、压力以及稳态液动力变化。仿真表明:锥形阀口区域的速度和压力梯度较大,主阀体出油口附近的直角区域容易出现小型旋涡等不良现象,此外,当阀芯位移达到0.5 mm时,稳态液动力达到最大值。研制了额定压力为45 MPa的溢流补油阀样件,测试结果表明:在入口压力42 MPa条件下的高压溢流补油阀具有快速的动态响应,超调量为2.5 MPa,响应时间为0.047s;补油流量从10 L/min增加到80 L/min时,压损从0.073 MPa增大到0.15 MPa,为高压溢流补油阀优化设计提供了定量分析依据。

摘要：聚脲弹性体的分子结构独特,具有优异的力学性能和良好的吸能特性,在提升基体的抗爆抗侵彻性能方面有显著的效果。本文对聚脲弹性体在防护领域的研究进展进行了全面梳理,主要围绕配方优化、防护结构应用以及吸能机理三个方面开展论述,并进行了深入的系统性分析。此外,本文归纳了聚脲弹性体研究中存在的问题,为其进一步的研究、应用以及新型防护结构设计提供了有益参考,对开展聚脲复合结构的抗爆抗侵彻研究具有重要意义。

摘要：The possible changes of tropical cyclone（TC） tracks and their influence on the future basin-wide intensity of TCs over the western North Pacific（WNP） are examined based on the projected large-scale environments derived from a selection of CMIP5（Coupled Model Intercomparison Project Phase 5） models. Specific attention is paid to the performance of the CMIP5 climate models in simulating the large-scale environment for TC development over the WNP. A downscaling system including individual models for simulating the TC track and intensity is used to select the CMIP5 models and to simulate the TC activity in the *** assessment of the future track and intensity changes of TCs is based on the projected large-scale environment in the21 st century from a selection of nine CMIP5 climate models under the Representative Concentration Pathway 4.5（RCP4.5）scenario. Due to changes in mean steering flows, the influence of TCs over the South China Sea area is projected to decrease,with an increasing number of TCs taking a northwestward track. Changes in prevailing tracks and their contribution to basin-wide intensity change show considerable inter-model variability. The influences of changes in prevailing track make a marked contribution to TC intensity change in some models, tending to counteract the effect of SST warming. This study suggests that attention should be paid to the simulated large-scale environment when assessing the future changes in regional TC activity based on climate models. In addition, the change in prevailing tracks should be considered when assessing future TC intensity change.