克孜河(南支)天南维其克河——老八里桥至大桥段防洪工程的必要性探讨

喀什市属于暖温带大陆气候,总特征是气候温和,四季分明,光照充足,热量丰富,降水量少,蒸发量大,空气干燥,无霜期长。喀什市克孜河上天南维其克渠首以下老八里桥下游7.03 km的防洪工程,平均河宽约150-200 m,最窄处宽仅50 m,下段河道由于河道束窄基本上为主河床。克孜河洪水灾害频繁而严重,其表现形式是冲毁堤岸及耕地,淹没农田、草场和村庄,冲断交通线路,冲毁水工建筑物等。严重威胁喀什市帕哈太克里乡的1.3万人、2.00万亩耕地和疏勒县的团结渠首的人民生命及财产安全。防洪工程项目实施后,即当该河道在遭遇20年一遇设计标准洪水时,可保证疏勒县的团结渠首及、帕哈太克里乡农民及耕地的安全,同时可以控制水土流失,改善生态环境,确保了人民群众生命和财产安全和河道的安全行洪。     

基于仿生防护技术的海底管线悬空治理研究

针对海底管线悬空对海洋油气田安全生产的严重威胁及其对海洋环境构成的重大隐患,文章以海底管线周围的局部冲刷及其冲刷防护与控制技术为研究对象,从海底管线冲刷机理入手,分析了管线一次悬空和二次悬空的原因,从模型实验和工程实践两方面开展仿生防护技术治理海底管线悬空研究,利用高分子材料仿生草叶片的柔性黏滞阻尼作用,减缓流速,降低水流的携沙能力,最终达到固沙、填沙、保护管线的目的。     

含疏水二氧化硅消泡剂

本文介绍了疏水ＳｉＯ２与烃类和硅氧烷组成的消泡剂，并对其消泡性能和洗涤剂中的应用进行了研究。     

褒河石门水库“81.8”洪水重现期的考证

一、工程概况 石门水利枢纽工程位于汉江支流褒河峡谷出口以上1.8公里处。南距汉中18公里。 本工程是以灌溉为主、结合发电等综合利用效益的大型水利枢纽,为褒河梯级开发的第     

汕汾高速公路典型软基路段预制砼管桩处理效果评价

在软基地区修筑高速公路,路基的沉降和稳定是制约施工工期和行车安全的两大基本问题,汕汾高速公路的典型软基路段按照常规手段处理后,路基填筑至设计高度一半,出现裂缝,果断地采取了部分卸载-等待-再加载的措施,再加载后裂缝再度出现.经多方反复论证,采取压入预制砼管桩的处理方案,效果良好,本文对此进行介绍,并从软基监测的角度进行评价.     

CYB-30型液力变矩器的改进

我厂生产的ZLM30装载机,在传动系中所采用的CYB-30型液力变矩器是参考国外样机试制的,如图1所示。经过几年运行,发现该变矩器出现下列几个问题:     

恫ǚ芍贫冉徊

家的审判机关,将本着严肃执法的精神,正确适用上述法律和行政法规,强化对知识产权的保护。下面,我重点介绍几个诉讼中的问题:0知识产权Intellectual Property32-34 14D923.4G117;1;GG117_1;杨金琪000400040004000130-32 12论目前商标     

Impact of Shaft Stiffness on Inertial Response of Fixed Speed Wind Turbines

Future power system faces several challenges,one of them is the high penetration level of intermittent wind power generation,providing small or even no inertial response and being not contributing to the frequency stability.The effect of shaft stiffness on inertial response of fixed speed wind turbines is presented.Four different drive-train models based on the multi-body system are developed.The small-signal analysis demonstrates no significant differences between models in terms of electro-mechanical eigen-values for increasing shaft stiffness.The natural resonance frequency of drive-train torsion modes shows slightly different values between damped and undamped models,but no significant differences are found in the number-mass models.Time-domain simulations show the changes in the active power contribution of a wind farm based on a fixed speed wind turbine during the system frequency disturbance.The changes in the kinetic energy during the dynamic process are calculated and their contribution to the inertia constant is small and effective.The largest contribution of the kinetic energy is provided at the beginning of the system frequency disturbance to reduce the rate of the frequency change,it is positive for the frequency stability.     

An optical flow-based method to predict infantile cerebral palsy

Cerebral palsy (CP) is a perinatally acquired nonprogressive brain damage resulting in motor impairment affecting mobility and posture. Early identification of infants with CP is desired to target early interventions and follow-up. During early infancy, distinct motion patterns occur which are highly predictive for later disability. These motor patterns can be observed and recorded. In this paper, a method to predict later CP based on early video recordings of the infants' spontaneous movements, applying optical flow and statistical pattern recognition, is presented. We extract motion information from video recordings of young infants using a total variation related optical flow method. By using wavelet analysis features from motion trajectories of points initiated on a regular grid were extracted and classified using a support vector machine.     

新疆蔷薇红景天总黄酮抗炎作用及急性毒性研究

目的研究新疆蔷薇红景天总黄酮的抗炎作用及其急性毒性。方法昆明种小鼠60只,随机分为模型组、阿司匹林组(0.2 g/kg)、总黄酮低、中、高剂量组(1.0、2.0、4.0 g/kg),建立二甲苯致小鼠耳肿胀急性炎症模型,考察蔷薇红景天总黄酮对二甲苯致小鼠耳肿胀的影响; SD大鼠50只,随机分为模型组、阿司匹林组(0.14 g/kg),总黄酮低、中、高剂量组(0.7、1.4、2.8 g/kg),建立棉球诱发大鼠肉芽肿慢性炎症模型,考察蔷薇红景天总黄酮对大鼠棉球肉芽肿形成的抑制作用;酶联免疫检测试剂盒测定慢性炎症大鼠血清中肿瘤坏死因子(tumor necrosis factor-α, TNF-α)、环氧化酶-2(cyclooxygenase-2, COX-2)、白介素(interleukin-6, IL-6)、丝裂原激活蛋白激酶(mitogen-activated protein kinase, MAPK)4种炎症因子的含量,考察蔷薇红景天总黄酮的抗炎作用;选取20只昆明种小鼠,随机分为实验组(160 g/kg)和空白组(蒸馏水),灌胃连续给药2 w,观察蔷薇红景天总黄酮的急性毒性。结果与模型组比较,蔷薇红景天总黄酮低、中、高剂量组对二甲苯致小鼠耳肿胀均有显著抑制作用(P0.05, P0.01, P0.01),其抑制率分别为25.75%、38.87%和61.13%;蔷薇红景天总黄酮低、中、高剂量组对大鼠棉球肉芽肿的形成均有明显抑制作用(P0.05, P0.01, P0.01),其抑制率分别为42.06%、53.89%、54.15%;蔷薇红景天总黄酮低、中、高各剂量组均能显著降低大鼠血清COX-2(P0.01)和MAPK的含量(P0.05, P0.01, P0.01);其中、高剂量组能显著降低大鼠血清TNF-α和IL-6的含量(P0.05, P0.01)。结论蔷薇红景天总黄酮具有一定抗急、慢性炎症作用,并且安全无毒。