高低温试验箱远程控制系统的设计及实现

本文基于改进目前高低温试验箱集中监控系统可靠性差、成本高、效率低的目的,采用WIFI无线通讯监控技术和基于C++软件自主开发的应用软件,结合高低温试验箱的特点,实现了对某军工单位研发实验室10余台不同种类高低温试验箱的集中监控,通过两年多的试验验证,得出采用WIFI无线通讯监控技术可实现对多台环境试验箱的远程可靠监控,为试验测试人员提供了实时、形象、动态的监控方法和手段,提高了设备工作效率60%且减低人工成本30%以上。

基于植株各器官生理响应对12种苜蓿抗旱性的综合评价

为筛选抗旱性强的苜蓿(Medicago sativa L.)品种,本试验以12个苜蓿品种为材料,利用聚乙二醇(Polyethylene glycol,PEG-6000)模拟干旱处理,设置了100 g·L^-1和200 g·L^-1两个胁迫梯度,分别测定叶片、茎、根颈、根系4个器官的渗透调节物质含量、抗氧化酶活性和植株根冠比,通过主成分分析计算植株各器官生理指标在抗旱性评价过程中所占权重,结合抗旱系数评价苜蓿品种的抗旱性。结果表明,在100 g·L^-1和200 g·L^-1 PEG模拟干旱胁迫下,植株的生长受到抑制,生物量、株高、叶面积、根长均减小,根冠比增加;各器官脯氨酸、可溶性糖、可溶性蛋白含量增加;超氧化物歧化酶、过氧化物酶、过氧化氢酶活性提高;在所有的生理指标中,脯氨酸、可溶性糖、过氧化氢酶活性对干旱胁迫的响应较敏感。不同器官生理调节物质的抗旱系数存在差异,叶片各指标对干旱胁迫的响应小于茎和根系,根颈脯氨酸和可溶性糖含量对干旱胁迫的响应大于叶片、茎和根系。在评价品种抗旱性时,根系可溶性蛋白含量、根颈脯氨酸含量、根颈可溶性糖含量、根系可溶性糖含量及根系过氧化氢酶活性占权重较大。综合分析得出,100 g·L^-1 PEG处理时,‘公农1号’、‘中苜1号’和‘前景’的抗旱性比较强;200 g·L^-1PEG处理时,‘骑士2’、‘东苜1号’、‘巨能2’和‘斯贝德’的抗旱性较强,可作为苜蓿抗旱栽培的参考品种。

悬臂式行车道板伸缩装置设计与施工要点

伸缩装置是承受桥面荷载、释放桥梁变位的重要构件,其病害发生率较高,对于钢结构桥梁更甚。不同的桥梁形式、结构特点,伸缩装置的设计应具有相应的针对性。该文结合实际工程项目,在总结钢梁伸缩装置设计及施工要点的基础上,对某钢桁梁桥行车道板伸缩装置设计及施工要点进行详细介绍,阐述其设计参数、适应性、冗余性。

2+1维欧拉方程的奇异解（英文）

借助于推广的CK方法,获得了2+1维欧拉方程的等价变换和新旧解之间的关系。基于拉普拉斯方程的解,给出了构造欧拉方程某些显式解的公式,并列出了部分奇异解.利用所求出的等价变换及其求解公式,得到了2+1维欧拉方程一些随时间演化的新奇异解.

贵州织金磷块岩型稀土矿与热液作用：流体包裹体证据

对织金磷-稀土矿果化矿段中摩天冲、戈仲伍矿段中磷肥厂磷块岩进行岩相学研究,对磷块岩中石英、白云石矿物流体包裹体进行冷热台显微测温研究,结果表明,磷肥厂硅质磷块岩中胶磷矿主要以碎屑磷灰石形式存在,粒径50~200?m,以硅质胶结和白云石胶结为主;石英、白云石捕获流体包裹体均一温度分布于87.5~127.8℃,盐度变化于12.31%~20.61%,计算的流体压力为5.54~8.02 MPa;而摩天冲白云质磷块岩中胶磷矿主要以是碎屑磷灰石形式存在,粒径变化于50~300?m范围,以白云石胶结为主;白云石捕获的流体包裹体均一温度变化于99.8~184.3℃范围,盐度变化于12.31~20.61 wt%,计算的流体压力变化于13.7~22.6 MPa。碎屑磷灰石胶结物以及流体均一温度和盐度上存在显著的差异,指示果化矿段中摩天冲白云质磷块岩所揭示的热液体系很可能是热卤水与正常海水混合所致,而晚期不含NaCl的硅质热液对早期形成的白云质磷块岩的交代对戈仲伍矿段中磷肥厂硅质磷块岩有着重要的影响。

包埋硝化菌载体深度脱氮及其配套装置中试试验研究

为推进包埋微生物载体技术在污水处理领域的工程应用,针对包埋载体在工程应用中出现的出水易堵塞问题,开发出一体化拦截设备进行现场载体深度处理及拦截试验。研究了包埋硝化菌载体应用于污水深度处理的效果,考察了拦网和自清洗出水拦截装置的运行稳定性,有效解决了载体易流失、出水拦截装置易堵塞等问题。结果表明,常规水处理条件下包埋硝化菌载体对氨氮具有较好的去除能力,深度处理出水氨氮在1 mg/L以下,出水COD在30 mg/L以下,出水SS值小于10 mg/L。拦截设备具有高效拦截的能力,滚筒拦截设备运行可靠。

重庆秀山地区大塘坡组锰矿稀土元素地球化学研究

为探讨重庆秀山地区大塘坡组锰矿形成的古氧化还原环境,以该区小茶园和笔架山锰矿为研究对象,采用显微镜、扫描电镜-能谱仪(SEM-EDS)和ICP-MS对矿石的主、微量及稀土元素进行了地球化学分析。结果表明,小茶园锰矿的稀土元素地球化学特征和笔架山锰矿相似,其Ce和Eu为正异常;矿石矿物面扫描分析显示,小茶园锰矿的中稀土元素(MREE)主要赋存于锰碳酸盐矿物中,这与锰矿稀土元素配分模式显示的“帽”型特征相吻合;小茶园锰矿的Ce正异常存在假象,并不能指示沉积时水体的氧化环境,可能与缺氧环境有关;其稀土总量和Y/Ho比值明显区别于现代海底铁锰结核(壳),进一步暗示锰矿并非以氧化物形式沉淀;其Eu正异常与(Ca+Mn)含量呈显著正相关,且Y/Ho比值与热液流体更为接近,表明锰矿受热液(水)活动影响明显。

Variational characteristics of shear-wave splitting on the 2001 Shidian earthquakes in Yunnan, China

In 2001 three earthquakes occurred in Shidian in Yunnan Province, which were the MS=5.2 on April 10, the MS=5.9 on April 12 and the MS=5.3 on June 8. Based on the data from the station Baoshan of Yunnan Telemetry Digital Seismograph Network, the variational characteristics of shear-wave splitting on these series of strong earthquakes has been studied by using the systematic analysis method (SAM) of shear-wave splitting. The result shows the time delays of shear-wave splitting basically increase with earthquake activity intensifying. However the time delays abruptly decrease immediately before strong aftershocks. It accords with the stress relaxation before earthquakes, which was found recently in study on shear-wave splitting. The result suggests it is significant for reducing the harm degree of earthquakes to develop the stress-forecasting on earthquake in strong active tectonic zones and economic developed regions or big cities under the danger of strong earthquakes.

Symmetry Groups and New Exact Solutions to （2＋1）-Dimensional Variable Coefficient Canonical Generalized KP Equation

In this paper, the modified CK＇s direct method to find symmetry groups of nonlinear partial differential equation is extended to （2＋1）-dimensional variable coeffficient canonical generalized KP （VCCGKP） equation. As a result, symmetry groups, Lie point symmetry group and Lie symmetry for the VCCGKP equation are obtained. In fact, the Lie point symmetry group coincides with that obtained by the standard Lie group approach. Applying the given Lie symmetry, we obtain five types of similarity reductions and a lot of new exact solutions, including hyperbolic function solutions, triangular periodic solutions, Jacobi elliptic function solutions and rational solutions, for the VCCGKP equation.

Study of （2＋1）-Dimensional Higher-Order Broer-Kaup System

Painleve property and infinite symmetries of the （2＋1）-dimensional higher-order Broer-Kaup （HBK） system are studied in this paper. Using the modified direct method, we derive the theorem of general symmetry gro.ups to （2＋1）-dimensional HBK system. Based on our theorem, some new forms of solutions are obtained. We also find infinite number of conservation laws of the （2＋1）-dimensional HBK system.

Symmetry Reductions, Exact Solutions and Conservation Laws of Asymmetric Nizhnik-Novikov-Veselov Equation

By applying a direct symmetry method, we get the symmetry of the asymmetric Nizhnik-Novikov-Veselov equation （ANNV）. Taking the special case, we have a finite-dimensional symmetry. By using the equivalent vector of the symmetry, we construct an eight-dimensional symmetry algebra and get the optimal system of group-invariant solutions. To every case of the optimal system, we reduce the ANNV equation and obtain some solutions to the reduced equations. Furthermore, we find some new explicit solutions of the ANNV equation. At last, we give the conservation laws of the ANNV equation.

Symmetry, Reductions and New Exact Solutions of ANNV Equation Through Lax Pair

In this paper, the direct symmetry method is extended to the Lax pair of the ANNV equation. As a result, symmetries of the Lax pair and the ANNV equation are obtained at the same time. Applying the obtained symmetry, the （2＋1）-dimensional Lax pair is reduced to （1＋1）-dimensional Lax pair, whose compatibility yields the reduction of the ANNV equation. Based on the obtained reductions of the ANNV equation, a lot of new exact solutions for the ANNV equation are found. This shows that for an integrable system, both the symmetry and the reductions can be obtained through its corresponding Lax pair.

New Multiple Soliton-like and Periodic Solutions for （2＋l）-Dimensional Canonical Generalized KP Equation with Variable Coefficients

In this paper, the generalized ranch function method is extended to （2＋1）-dimensianal canonical generalized KP （CGKP） equation with variable coetfficients. Taking advantage of the Riccati equation, many explicit exact solutions, which contain multiple soliton-like and periodic solutions, are obtained for the （2＋1）-dimensional OGKP equation with variable coetffcients.

New Exact Solutions to Dispersive Long-Wave Equations in （2＋1）-Dimensional Space

New exact solutions expressed by the Jacobi elliptic functions are obtained to the （2＋1）-dimensional dispersive long-wave equations by using the modified F-expansion method. In the limit case, new solitary wave solutions and triangular periodic wave solutions are obtained as well.

Symmetry Reduction, Exact Solutions, and Conservation Laws of （2＋1）-Dimensional Burgers Korteweg-de Vries Equation

Using the classical Lie method of infinitesimals, we first obtain the symmetry of the （2＋1）-dimensional Burgers-Korteweg-de-Vries （3D-BKdV） equation. Then we reduce the 3D-BKdV equation using the symmetry and give some exact solutions of the 3D-BKdV equation. When using the direct method, we restrict a condition and get a relationship between the new solutions and the old ones. Given a solution of the 3D-BKdV equation, we can get a new one from the relationship. The relationship between the symmetry obtained by using the classical Lie method and that obtained by using the direct method is also mentioned. At last, we give the conservation laws of the 3D-BKdV equation.

Application of the Binary Bell Polynomials Method to the Dissipative(2+1)-Dimensional AKNS Equation

Based on the binary Bell polynomials,the bilinear representation,bilinear B?cklund transformation and the Lax pair for the dissipative(2+1)-dimensional Ablowitz-Kaup-Newell-Segur(AKNS)equation are obtained.Moreover,the infinite conservation laws are also derived.

串列三圆柱平均风压和平均阻力的干扰效应

为了给实际工程中串列三圆柱结构的风荷载取值提供参考,通过刚性模型测压风洞试验方法,测试了12个不同间距比L/D(L为两圆柱中心之间的距离,D为圆柱的直径)下串列三圆柱的平均风压系数和平均阻力系数,并与单圆柱的平均风压系数和平均阻力系数进行了对比。研究结果表明:串列三圆柱存在临界间距,其临界间距比为3.0≤L/D≤3.5。三个圆柱的平均阻力均小于单圆柱的平均阻力;上游圆柱的平均阻力最大,下游圆柱的平均阻力次之,中游圆柱的平均阻力最小。

Reduction and New Explicit Solutions of （2＋1）-Dimensional Breaking Soliton Equation

Abstract By applying the Lie group method, the （2＋l）-dimensional soliton equation is reduced to some （1＋1）-dimensional nonlinear equations. Based upon some new explicit solutions of the （2＋1）-dimensional breaking soliton equation are obtained.

New Exact Solutions to Long-Short Wave Interaction Equations

New exact solutions expressed by the Jacobi elliptic functions are obtained to the long-short wave interaction equations by using the modified F-expansion method. In the limit case, solitary wave solutions and triangular periodic wave solutions are obtained as well.

Symmetry Groups and New Exact Solutions of(2+1)-Dimensional Dispersive Long-Wave Equations

Using the modified CK＇s direct method, we derive a symmetry group theorem of （2＋1）-dimensional dispersive long-wave equations. Based upon the theorem, Lie point symmetry groups and new exact solutions of （2＋1）- dimensional dispersive long-wave equations are obtained.