useful flow 中文意思是什麼
useful flow
解釋
有效流量-
The air - flow field in the stripping unit can be adjusted easy by changing the rotation speed of fan which is benefit to reduce the grain losses, it was found during experiment that the cross - flow fan can diffuse some of mog ( material other of grain ) and diffuse it in a certain direction which is useful to satisfy the working condition for driver and lighten working load of the threshing unit of the combine harvester candidate and speciality : peng shengmin ; machinary design and theory supervisor : prof. zhang huiyou
該裝置可以通過控制橫流風機的轉速，使裝置內氣流在有控制的情況下排出裝置外，改善了裝置內流場狀態，提高了裝置喂入口處的負壓，這對減少摘脫裝置的落粒損失，有著重要意義。由於橫流風機的除雜，可以減輕機器的復脫和清選負荷。安裝橫流風機后可以對裝置的出風口處灰塵進行有效導引，改善駕駛員的工作條件。 -
Computational flow imaging ( cfi ) uses theoretical predictions of the interaction and transmission of optical waves through theoretical flowfield to generate digital pictures that simulate real observations. it was used to construct flow visualization corresponding to shadowgraph, schlieren, interferometric and planar laser induced fluorescence ( plif ) images. by providing a better insight into the flow physics and cfd code behavior, cfi is proving to be extremely useful to experimentally validate cfd codes
計算光學流動顯示技術（ computationalflowimaging - cfi ）就是把數值計算（ cfd ）獲得的流場中的物理場，經過與實驗相同的計算光學（全息干涉、紋影、陰影、平面激光誘導熒光）的過程轉換為所需的各個方向與試驗流動顯示圖像相對應的計算流動圖像。 -
Rivers must flow to be useful. air must flow to refresh
河水流動，才能涓涓不絕；空氣流動，才能生意盎然。 -
This show us a very useful signal in studying the systematic property in the early stage of the evolutive colliding system, that ' s, a non - zero flow component of those particles observed by experiment could be interpreted as a signal for partonic flow
因此在碰撞早期產生的重子數輸運是高能重離子碰撞中的一個重要的物理量，它影響著初態部分子的平衡，粒子的產生，系統的熱力學或化學平衡以及集體膨脹等過程。 -
The porous diffusion type silencer is widely used to reduce the air flow noise because of its small volume and high noise attenuating ability. the out case of the silencer plays a very important role in reducing noise. the effect of the hole ' s shape, diameter and the distance between neighboring holes as well as the matchup between the case and the sound absorbing material tube are investigated experimentally. the relation between the out - flow noise and the gas velocity distribution is carefully studied for two different kinds of matchup between the case and the sound absorbing material tube. some useful results are gotten, which may be valuable to the design of the silencer
多孔擴散型消聲器由於其體積小、消聲性能高而廣泛應用到排氣噪聲的降低上，其外殼對消聲器的消聲性能具有重要作用.本文對此類消聲器外殼的孔型、孔徑和孔距以及外殼同消聲材料的配合方面進行了細致的實驗研究，特別對外殼與消聲材料的配合與其排放噪聲以及外部流場之間的關系進行了探討，得到了一些有用的結論，對消聲器性能的提高具有一定指導意義。 -
In order to describe clearly about the whole flow of conference control we introduce petri network to tell how the control unit works. in the end of this article we discuss some useful techniques to resolve security problem which are also very important in the system
通過rtp rtcp封包解包的設計實現對網路的流量控制，其中實現了漏桶演算法的思想，並給出rtp rtcp組幀的流程；文章還對視頻會議系統所面臨的安全問題進行簡單的分析並概括了一般的實現方法。 -
Conclusion : color doppler flow imaging is a useful noninvasive method for the diagnosis of vertebral artery course variation
結論：彩色多普勒超聲對椎動脈走行變異是一種理想的無創性診斷方法。 -
The pneumatic performance of the fan was got when working at several different rotation speeds based on the similar theory, which is useful to estimate the pneumatic performance of the fan when the air flow of the fan changes, and further the grain loss of the unit can be estimated
由裝置出風口的氣流流量，通過特性曲線來求解出風機該狀態下的其他性能系數，分析此情況下的風機性能對裝置落粒損失的影響因素。 -
Product design is a complicated thinking activity of creation of human. based on analyzing product design and its process, using a theory and method of aggregating and mapping, models of product design, process of product design, process of conceptual design of product were constructed, a frame of network arithmetic of a process of conceptual design of product was presented, its flow of decomposition and integration was particularly defined ， a good base for modeling and ruling of process of product design was founded. at one time, a useful exploration of development of a computer support implement for process of product design at all life cycle was made
產品設計是一種復雜的人類創造性思維活動.在分析產品設計及其過程的基礎上，利用集合與映射的理論與方法，依此建立了產品設計、產品設計過程、產品概念設計過程的模型，給出了產品概念設計過程的網路演算法框圖，並且詳細定義了後者的分解與綜合的流程，為產品設計過程的模型化、規律化打下了良好的基礎，同時也為產品全生命周期設計過程計算機軟體支持工具的開發作出了有益的探索 -
This is useful in such situations as where the control flow is running through a large loop, causing the same call graph output to be repeated over and over again which in turn leads to an increased graph size and consequent reduced usefulness
這對于如下情形是很有用的，其中控制流完整運行一個較大的循環，導致相同的調用圖輸出一次又一次地重復（這反過來又導致圖的尺寸增大，從而降低了其適用性） 。 -
The computational results of models are in satisfactorily agreement with the experimental data. all the results show the validity of the proposed models. the present k - l les and 3d k - l les model are proven to be new useful tools for the study on turbulent flow in open channel with a vegetated region
K - lles模型和3dk - lles模型為進行帶有植物的河道水流紊流運動數值計算研究，特別是對分析存在植物的河道水流運動形態及由於植物的阻礙在河道中產生的大尺度渦的形成、發展研究提供了一個新的研究途徑。 -
This thesis brings some new proposals for the computation of temperature rise in nature oil transformer. some useful formulas for convection calculation of vertical and horizontal duct are given. so temperature decrease at the surface of discs and temperature rise of oil flow can be obtained
得到了較為適合的垂直油道、水平油道自然對流換熱特性數經驗關聯式，並據此得到了自然油循環變壓器垂直油道和水平油道線餅表面溫降和油流溫升的計算方法。 -
Based on data generated, we classify 8 recipients into three categories in terms of possible environmental impact : ( 1 ) low risk of gene flow to common cultivars ; ( 2 ) intermediate risk to common wild rice with same aa genome ; ( 3 ) high risk to ms lines. 2. development of a specific database for toxin and anti - nutrient proteins bioinformatics is a very useful tool for risk assessment of gm foods
從轉基因水稻的環境風險考慮，轉基因向常規稻的基因漂流頻率及最大距離都較小，相應地其風險也較低；向不育系的基因漂流頻率較高，最大漂流距離也較大，相應地其風險也較高，應重點考慮轉基因漂流對雜交稻制種純度的影響及其可能引起的環境風險後果；轉基因向普通野生稻的基因漂流頻率中等。 -
The effective optimization design programs for different cases are developed by integrating the following several aspects which involves the flow analysis, adjoint equation solution, gradient solution, optimal arithmetic and grid generation. some practical design tests for airfoil and wing show that the continuous adjoint approach is very effective and useful method for aerodynamic optimization design. at the same time, we have done the research of aerodynamic optimum design for airfoils by using navier - stokes equations
（ 4 ）研究了基於控制理論和三維navier一stokes方程的優化設計理論，在計算坐標下詳細推導了該優化設計理論，得到了計算坐標系下描述的共扼方程數學描述形式，並以給定目標壓力分佈的氣動反設計為例，導出了相應的共扼方程邊界條件，以及關鍵的梯度求解具體表達形式，為了求解方便，把計算空間上描述共扼方程表達形式變換到物理空間中進行描述，通過與ns方程表達形式對比分析，最終給出了一種直觀的共轆方程表達方式。 -
There is no thoroughly rounded theory about displacement ventilation system in our country at present and our research begins recently. the study work of this paper will be useful for further optimization design of displacement ventilation system. this dissertation includes five parts. the first part introduces the development of the displacement ventilation and the background of research in domestic and oversea. in the second part, it gives working principle of displacement ventilation system and it ’ s advantages to the mixture ventilation. the study also gives a series of indexes to evaluate displacement ventilation system and specifies air supply terminal device and so on. it is needed to simulate and analyse the velocity field, temperature field and distribution of flow field. this is the third part. the forth part specifies the simulative method for thermal stratification of displacement ventilation system. it gives some factors affecting thermal stratification height such as inlet temperature, inlet velocity, heat transfer of wall body, distance of heat source and so on
本文的研究工作主要包括以下幾個方面的內容: （ 1 ）綜述了國內外相關的研究現狀和研究背景; （ 2 ）簡介了置換通風的工作原理，並分析了它相對于混合通風的優良特性及評價指標、末端裝置等; （ 3 ）對採用置換通風方式房間的溫度場、速度場和氣流分佈進行了模擬計算與分析; （ 4 ）對採用置換通風方式房間的熱力分層高度進行了模擬計算，並分析其影響因素，如:送風溫度、送風速度、圍護結構傳熱和熱源分佈等; （ 5 ）擬合了無量綱熱力分層高度相應于送風溫度t 、送風速度v 、熱源間距離l和圍護結構傳熱q的經驗公式。 -
It may be useful to deepen the related study. in this thesis, some contents are studied as follows : ( 1 ) fractal characters of china coastline, mountain ridges, faults are studies roundly, including the fractal demarcating of the length of continental coastline of china, the spatial change of fractal dimensions of coastline from north to south of china, spatial relations of fractal dimensions of china coastline, mountain ridges, faults, etc. ( 2 ) fractal characters of china earthquakes, landslides and mud flow are studies roundly too, including the spatial relations of fractal dimensions of them, etc. ( 3 ) the fractal mechanism of china coastlines are discussed in different scales, including the pattern of the controlling effect of faults, crannies, etc. in a word, fractal characters of china main geomorphologic phenomena and geological disasters are studied in this paper, it is useful to deepen the related studies, and explore possible ways of geographical innovation of china
概而言之，本項研究對可以稱得上是一個典型研究區域的中國主要地貌與主要地質災害中可能存在的分形現象進行了系統探討，並以分維為中介參數對中國主要地貌與主要地質災害以及二者之間的空間關系進行了探討，從而在廣度上在一定程度上豐富了中國地學分形研究的基本素材，在一定程度上也填補了對中國中觀地學現象分形研究的空白；同時，本項研究還選擇了分形研究領域里最傳統、博士學位論文摘要最具代表性的海岸線為突破口和創新點，探討了中國海岸線分形性質的存在機制問題，研究了不同尺度下構造與物質組成對中國海岸線分形性質的影響，從而在深度上在一定程度上深化了傳統的分形研究，在實現地學分形研究從現象揭示到機制探討的轉變方面進行了率先的探索。 -
Hence, they that flow field calculation and dynamical computation of fluid - solid coupling dynamic characteristics are carried out to search flow law in the hydraulic turbine, optimize the design of scroll casing, guide vane, blade and draft tube, and they can apply useful to the monitoring and fault diagnosis system of hydroelectric set as well
因此，為探求水輪機內部的流動規律，優化水輪機設計，為水輪機的安全穩定性運行和機組的故障診斷提供幫助。對導葉內部的流動進行流場計算和流固耦合振動特性的動力計算就顯得十分必要。 -
None of ectopic pregnancy had trophoblastic artery flow within the endometrium. conclusion observation of endometrial three - line pattern and trophoblastic artery flow by transvaginal ultrasonography were useful for diagnosing eraly ectopic pregnancy
結論經陰道超聲觀察子宮內膜「三線樣」改變與探測滋養動脈血流對診斷早期宮外孕有重要意義。 -
In chapter 5 experiments is made on pulverized coal classifier ( pcc ) with air absorbed from the bottom of it and hope to find a simple and high efficiency method to collect coal. the results show the useful method is to control certain absorbing air quantity and positions. simulation is made on pcc to study the flow field and grain track
最後，本文對電廠的一臺200mw的四角切園的鍋爐應用再燃改造方案后爐內的情況進行了數值計算模擬，研究了四角切圓鍋爐內no _ x的生成規律和再燃技術應用后對no的還原效果，並對鍋爐進行改造后爐內的流場和溫度場進行了計算，為工程應用提供參考。 -
The heat resources management was oriented to the forest resources administrator of a county or a city, and was aimed to design a transfer management model which integrated forest resources transfer business process, such as application, approval, investigation and assessment, information publishing, property license issuance and task design etc. based on a great deal of requirement investigation and analysis, designed the business process, data flow and function architecture of the forest resources transfer office system by soft engineering, and developed a platform which is advanced, useful, safe, open, interoperable and personal
摘要以縣（市）級森林資源管理層為主要用戶對象，以森林資源流轉申請、審批、調查評估、信息發布、權證辦理和作業設計等環節於一體的森林資源流轉管理模式為目標，採用軟體工程的方法，在大量的需求調查與分析基礎上，制定了森林資源流轉辦公系統的業務流程、數據流程和功能結構，並開發了集先進性、實用性、安全性、開放性、通用性與個性化相統一的軟體平臺。
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