Since ureido - dcarbamido grease with high dripping temperature , long life , withstand high temperatures , high - speed , anti - water , it has broad industrial applications , but the ability of resisting high pressure is not well which limit its development more or less 由于脲基润滑脂具有滴点高、使用寿命长、耐高温高速性、抗水性等优点,使其在工业上具有广泛的应用,但脲基脂本身的极压性能不高等缺陷在一定程度上限制了其发展。
But the cost of the testing system limit the further intelligent development , and " a / d convert " is the key part of this system . in order to solve this conflict problem this paper gives a method - by adding a few components to at89c2051 , and using it ' s internal converter we have designed a a / d module with the function of microprocessor 但是检测系统的成本在一定程度上限制了传感器向智能化方向发展，而检测系统的关键部件就是“模数转换装置” ，为了解决这一问题，本文利用具有极高性能价格比的at89c2051单片机本身带有的内置比较器，通过外接少量元件，设计出了具有微处理器功能的a d模块。
At present , the typic harmful current detection methods are the fast fourier transform algorithm in frequency domain and methods based on the instantaneous reactive power theory , these methods all require some transform and quick , real - time calculating , so high precision analog multipliers or high speed dsp chip with fast a / d are needed , this results in complex circuit and high cost ， which have restricted the development of apf 目前畸变电流检测常用的方法有频域法的fft和基于瞬时无功理论的畸变电流检测法。这些方法均有一定的变换，需要快速、实时运算，因此必须使用高速的数字微处理器和高性能a / d转换器，这必将大大提高系统成本，使得电路结构复杂，在一定程度上限制了有源滤波器的发展。
Further to explain , the relational factors can not be negligent , the mechanism of consultation should be established , the bank ’ s set - off should be restrained through terms and conditions and procedures , the customer has the dissenting right about the bank ’ s set - off , and the customer should be self - protecting 具体而言,在银行抵销权制度中,应当充分考虑关系因素,建立协商机制和程序机制,从条件、程序上限制银行抵销权的行使,赋予客户抵销异议权,加强客户自我保护意识。
Then reasons of spreading officially the valuation with bill of quantities are analyzed from the domestic and the abroad ： the current valuation mode in construction industry in our country is formed under the social average price ， and this mode does n ' t reflect actually the true capability of each tendering enterprises ， at the same time ， it limits the fair competition in a certain degree ； the valuation with bill of quantities can reflect individual cost in each project ， and can be benefit in quotation of enterprises independently 然后从国内国外因素分析实行工程量清单计价的原因：我国现行工程造价计价模式以社会平均价格为依据形成工程造价，不能实际反映各投标企业的真实水平，在一定程度上限制了企业的公平竞争；工程量清单计价能反映工程个别成本，有利于企业自主报价，符合市场经济的价值规律，国外大多采用这种计价方式。
According to urban transportation conditions at present , the level of service of traditional transit system in most cities in china is relatively low because can not provide transit service with sufficient quality . although metro system can provide higher level of service and more effective than that of traditional transit , its expensive construction and operation costs confine its application and development in a great extent 但从目前的状况来看,我国大部分城市的常规公共交通的服务水平普遍较低,不能满足人们对出行质量的要求,而轨道交通虽然具有很高的运输效能和服务质量,但其高昂的建设和营运成本又在很大程度上限制了它的应用和发展。
However , the inherent shortcoming of piezoelectric transformer hinders its further development . the major problems include : ( 1 ) the development and design of the piezoelectric transformer involve in lots of theoretic aspects including the design of material , dimension , electrode and circuit ; ( 2 ) it is hard to harvest high voltage enhancement ratio and high - power output simultaneously ; ( 3 ) the operation of the piezoelectric transformer is strongly dependent on the resonance frequency , which leads to the difficulty in the design of driving circuit 但其自身所存在的固有缺点也在很大程度上限制了压电变压器的进一步发展,突出的问题有:压电变压器的研制包括材料设计、尺寸设计、电极设计和电路设计等多个环节,所涉及的理论面很广;压电变压器的高升压比和大功率输出难以同时得到保证;压电变压器的工作过多地依赖于谐振频率,为外部电路的设计带来了困难。
Abstract : this thesis discussed how to limit the death penalty and guarantee its quality from the perspective of procedure which includes 3 questions : first , there have several issues need to be solved for the second public hearing trial ; second , it ' s not enough to take the death penalty review power back from the high court to the supreme court ; third , it ' s so necessary to strengthen defense in the death penalty cases 内容提要：本文从三个方面讨论了如何从程序上限制死刑、保证死刑案件的质量，分析了落实死刑案件二审开庭所要解决的问题，指出应利用死刑复核收回这一机会完善相关制度，并提出加强死刑案件辩护的若干建议。
Up to now , the geosynthetic reinforcement mechanism is still not very clear ; design method is not maturated ; and theoretical research lags behind engineering practice , to some extent , which hinder the application of geosynthetics . therefore , it is necessary to make further researches on geosynthetic reinforcement 目前，土工合成材料的加筋机理不十分清楚，计算方法不成熟，理论研究明显落后于工程实践，一定程度上限制了土工合成材料的工程应用，因此迫切需要对土工合成材料加筋土进行深入的研究。
