差等

Focused on many problems existing in pressure control system of drilling pipe friction welding,such as high failure rate and poor amenability,the basic principles of friction welding and electro-hydraulic proportional technique were briefly described.

针对焊接钻杆连续驱动摩擦焊机采用开关阀组成压力控制系统存在故障几率高、可控性差等问题，将电液比例控制技术应用在摩擦焊压力控制中，实现了摩擦焊轴向压力闭环控制、滑台进给速度的开环控制；可对摩擦焊机主轴速度、轴向压力、轴向缩短量、主电机电流、油温等进行实时检测。

The no-hull cushaw seed is the competitive agro-product that exports to European countries and US in recent years. However, the product has a low production and inferior appearance. Aiming at the two problems, Wuwei Golden Apple Co. ltd. conducted a systemic research, and a series of high-yield and good-looking products with A, AA and AAA grades were developed, greatly enhancing the position and competitiveness of China's natural the no-hull cushaw seed in the international market.

项目简介：天然无壳瓜籽是我国近年来出口欧、美等国家的优势农产品，但由于该产品在种植生产中存在产量低，商品外观质量差等不足，武威金苹果有限公司针对这两个问题进行了系统的研究，研制出了亩产量高，商品外观洁净、美观的"A"级、"AA"级和"AAA"级产品，大幅度地提高了我国天然无壳瓜籽在国际市场上的地位和竞争力。

In allusion to the defect of grads descension of traditional back propagation network algorithms, some improving measures such as adaptive learning and additive momentum has been taken, and better application result is acquired.

针对基于梯度下降法的BP网络存在的学习效率低、收敛速度慢、易陷于局部极小状态、网络的泛化及适应能力较差等缺陷，采用了附加动量法及自适应学习率、合理选择激励函数等策略对算法中的缺陷给出了改进措施，取得了较好的应用效果。

An analytical model was built up on the jet deflection in the crossflow by applying the theorem of momentum, which takes full account of mixing between the upstream fluid and burner jet, and of the total pressure difference between the two sides of the jets. Through analysis of this model, experimental study and numerical simulation, effects of the nozzle spacing ratio, width of the furnace corner, width of the nozzle and imaginary circle diameter on the aerodynamic field in the furnace were obtained.

本文综合考虑了炉内旋转气流与燃烧器射流的混合和燃烧器射流向火侧与背火侧的全压差等因素，应用动量定理建立了横向气流中射流偏转的分析模型，并结合冷态模化试验和数值模拟计算，得到了燃烧器间隙率、炉膛切角、喷口宽度和假想切圆直径等因素对炉内空气动力场影响的规律。

And the securitization cannot solve the problems of adverse selections, etc. The market failure of catastrophic insurance market necessitates the government intervention, and the expansion of the definition of insurability to the whole economy, including public sector, supports the intervention theoretically.

巨灾风险证券化部分解决了商业保险市场资本相对不足的问题，但费用高昂和流动性差等因素限制了巨灾证券的应用，并且对于诸如逆选择等限制巨灾风险可保性的因素巨灾证券化无能为力。

The measuring methods of liquidity mainly includes: the measuring methods based on the supply and demand theory, Marshall K value and the excess money growth rate, monetarism liquidity measuring methods and etc, at the micro level, market liquidity was mainly reflected by short-term money market interest rates, stock market index yield variance and other indicators.

流动性的测度方法主要包括：基于流动性供求理论的测度方法，马歇尔K值与超额货币增长率，货币主义流动性测度方法等，在微观层面的市场流动性则主要通过短期货币市场利率、股票市场指数收益率方差等指标来反映。

Observationalgross error, such as cycle slip, and deleting nonlinear high-order term above quadraticcan make the observational equation emerge model error.

非线性二次以上高次项舍去，以及周跳等观测粗差等原因，使观测方程产生模型误差。

In order to tackle the difficulties including the sidetracking, the reentrance of the main hole, the well bore trajectory control, and the poor drillability of the formation, some technologies are put forward, such as the sidetracking technology of compound holes, the pipe string reentrance technology of main holes, the well bore trajectory control technology, and the drilling speed increasing technology. All the technologies have been applied to the field successfully, greatly shortening the drilling cycle and guaranteeing the safe and fast completion of the well.

针对悬空侧钻、主井眼重入、井身轨迹控制和地层的可钻性差等多个技术难点，提出了复合井眼悬空侧钻技术、主井眼管柱重入技术、井身轨迹控制技术和钻井提速技术等方法，在现场应用中取得了显著效果，大大缩短了钻井周期，保证了安全快速完井。

Since there exists some disadvantages such as poor mechanic properties and much higher burning rate pressure exponents (?1) in the fundamental formulations, this work is devoted to the improvements of combustion characteristics and mechanic properties of LOVA propellants. The effects of the crystal shape, size and contents of nitroamine particles, the types of binder, plasticizer and surface-active agents and the contents of NC on combustion performance are studied by closed bomb tests. In the mechanic properties tests, the effects of the types of binders, plasticizers and solid fillers, the interaction between binders and solid fillers and technological procedures on propellant mechanic properties are researched.

针对基础配方具有燃速压力指数远大于1、力学性能差等特点，采用密闭爆发器等试验手段，研究了诸如硝胺粒径、硝胺晶体形状、硝胺含量、粘结剂、增塑剂、硝化棉含量及表面活性剂等因素对燃烧性能的影响；采用抗沖、抗压静态试验方法，对粘结剂、增塑剂、固体填料、粘结剂与固体填料之间的相互作用及工艺条件与力学性能之间的关系进行了研究，提出了改善低易损性发射药燃烧性能和力学性能的技术途径。

Based on the analysis of sediment grain size,suspended matter concentration in the water and other indicators,and on the examination of tidal variation data in the Yangtze Estuary,we found that the seasonal erosion and deposition cycle is closely linked to the morphology,suspended matter concentration in the water,hydrodynamics,tidal variation,wind direction,etc.

通过对沉积物粒度、水体含沙量等指标的测试，并借助潮差等资料，探究了影响潮滩季节性沉积的因素，发现潮滩季节性沉积与潮滩基础地貌、水体含沙量、水动力、潮流等有密切关系；但在不同部位不同季节，各因素对潮滩冲淤影响程度各不相同。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。