useful weight 中文意思是什麼
useful weight
解釋
有效載重量-
As the key block of the wireless communication transmitter in rf, it is very useful in improving the output power and efficiency, lowering the loss of the supply, lowering the size and the weight, lengthening the time of communication. class e power amplifier which is suitable to amplify envelop signal is very important in modern communication system
功率放大器（ pa ）作為無線通信射頻發射機中不可缺少的關鍵電路，對于提高手機的功率效率、降低電源損耗、減小體積重量、延長通話時間有著舉足輕重的作用，而適用於恆包絡信號放大的e類功率放大器，更是在現代通信系統中佔有十分重要的地位。 -
High - fibre foods tend to be low in calories, which are useful in controlling body weight
由於食物纖維熱量很低，能有助控制體重。 -
The weight test has been used because bigger soldiers were often unable to take on certain roles. drivers " seats in tanks, for example, offer limited space. however, there is a recognition that brute strength can be useful for tasks such as carrying artillery for extended periods, and building bridges
報道說，有關方面之所以在徵兵過程中一直對申請者進行專門的體重檢測，主要因為那些塊頭太大的士兵往往無法勝任軍營中某些特定的工作，比如坦克內駕駛員座位所能提供的空間就極為有限。 -
With the coming of information age, more and more people realize the importance of information. useful information hidden in plenty of data needs mining energently. the technology of data mining arises and develops unders such circumstance. the main tast of data mining is to extract or mine the useful information from the data. we can get great amount of data from the computer transaction every day. the data is very useful for us to make decisions on management. the paper concludes and introduces association rule about its concept, sort, model and step for mining the data, measure and some basic algorithm on the basis of the at research. at the same time, we analyse hopfield - network ' smodel, character, energy - function, movement - equation and so on. moreover, to the requirement of the system of information of computer - saling, we have done the following and there are good result. fisrt, considering the weight and constraint, we propose the algorithm for the weighted and constraint association rule
本文首先對數據挖掘中的關聯規則和神經網路的已有成果作了詳細深入的調研，歸納和整理了關聯規則的概念、分類、關聯規則挖掘的模型與步驟、關聯規則的度量方法以及一些基本演算法；還歸納和整理了hopfield網路的模型、特徵、能量函數、運動方程等，並在此基礎上，結合電腦賣場信息支持系統提出的需求，做了如下工作，並取得了一定的成果和成效： （ 1 ）考慮加權與約束兩種情況，提出了既帶權重又帶約束的關聯規則提取演算法。 -
Abstract : polyphenylacetylenes were synthesized by rn ( nbd ) cl 2 and wcl6 / ph4sn catalyst systems in n2 at room temperature. polymers with high yield and high molecular weight were obtained. their structures were characterized by uv, ir, nmr and gpc, respectively. the fluorescence of the polymer solution with different concentration was investigated using variable excitation wavelength from uv to visible region. the relation between fluorescence and polymer structure was studied. the results showed that the molecular chain structure has great influence on fluorescence of the polymers. the emitting peak wavelength of fluorescence for the polymer of high stereoregularity is independent of solution concentration and excitation wavelength. the emitting peak wavelength of fluorescence for the polymer with disordered molecular chain arrangement varies with changing the solution concentration and excitation wavelength, and different emission sites in molecular chains and low emitting yield are shown. the measurement and analysis of fluorescence spectroscopy of polyphenylacetylenes may provide some useful information to judge the molecular chain arrangement in some conjugated polymers
文摘:使用有機金屬銠、金屬鎢/四苯基錫催化劑體系聚合苯乙炔，分別獲得了高產率和高分子量的聚苯乙炔.使用uv ， ir ， nmr ， gpc等分別對聚合物結構進行了表徵.採用不同波長的激發光對聚合物熒光性能進行研究，詳細分析了聚合物結構與熒光性能之間的關系.研究結果發現，不同聚合物結構對聚合物熒光性能產生很大影響，規整性高的聚合物，將有較高的發光量子效率；聚合物規整性差，將可能導致多個熒光發光結構點，其熒光強度降低.聚合物熒光光譜研究將對某些共軛聚合物結構的規整性分析提供一些有用的信息 -
A number of topics were explored at the seminar which include the followings : i prof. stanley hui lectured on childhood obesity, physical activity and health as well as it application ; ii mr. raymond sum proposed some feasible activity ideas that teachers could adopt to tackle childhood obesity ; iii two colleagues from the information technology section of the education and manpower bureau shared some initiatives in using it to promote children physical activity ; iv two primary school teachers also shared their experiences in implementing weight control initiatives in their own schools ; and v prof. lu dajiang from shanghai sports institute demonstrated some useful computer program for monitoring childhood obesity and prescribing exercise for obese children
此外，許教授並提出要有效控制學童體重，必須採用多元策略，包括從體能活動、飲食控制及家庭參與三方面著手。該系並於今日舉行學童肥胖與體能活動工作坊，有數十名老師報名參加。工作坊上，由許世全教授主講學童肥胖與健康課題，沈劍威導師介紹控制學童肥胖體能活動建議，上海體育學院陸大江教授及香港教統局資訊科技教育組介紹透過資訊科技控制學童肥胖運動處方的電腦軟體，並由學校老師現身說法分享在學推行控制學童肥胖的運動計劃經驗。 -
The merit of this kind of robot is obvious. underactuated robot maybe useful in particular instances to reduce weight, cost or energy consumption, while still maintaining an adequate degree of dexterity
這種機器人的優點是顯而易見的，由於驅動的減少，使機器人的重量減輕了，成本也降低了，同時也減少了能源的消耗。 -
After analyzing the performance of the coherent tree - structured optimal joint detection ( tsojd ) for qpsk signals and deriving a non - coherent multi - user weight / phase estimator, the dissertation proposes a low complexity non - coherent multi - user weight / phase optimal joint detection algorithm. besides, the dissertation proposes a partial coherent multi - user / iv weight / phase optimal joint detection algorithm and some useful conclusions are obtained in comparison experiments. 4. in the research on the diversity techniques for fast fading multi - path channels, the dissertation proposes a time - scale rake receiver, and analyzes its performance with the conception of auto - wavelet - transform ( awt ) and time - - scale resolution
提出了過飽和低復雜度qpsk信號的樹型最佳聯合檢測演算法，並分析了相應最佳接收機的性能及相位偏差對性能的影響等問題；考慮了載波相位和多用戶信碼的聯合檢測問題，通過理論推導給出了過飽和多址系統中多用戶信碼/相位聯合估計子，提出了低復雜度非相干多用戶信碼/相位最佳聯合檢測演算法，並分析了此非相干最佳接收機的誤碼性能及相位提取誤差等有關問題；提出了部分相干多用戶信碼/相位最佳聯合檢測演算法，通過計算機模擬分析了該接收機的誤碼性能及相位提取誤差等有關問題，並與相干、非相干解調兩種情況作了比較，得出了一些有益的結論。 -
Combining the design of portal crane luffing mechanism, this paper set up the math model independently and synthetically of the single boom system with compensating pulley and level - balancing weight. use genetic algorithms to optimize the model, the calculated results show as follows the genetic algorithms is effective and manipulable, the synthetically optimize is best than independently optimize. the optimization program of luffing mechanism was build, and this will be a useful tool in the design of crane
結合門座起重機變幅機構的設計，建立了導向滑輪補償系統和杠桿? ?活對重臂架自重平衡系統獨立模型和綜合模型的未平衡力矩最小的優化問題，結合遺傳演算法對它進行了優化，結果證實了該演算法的有效性和可行性，表明了綜合優化比獨立優化更能提高優化的準確性。 -
There are many members hi large size structures, so the weight coefficients distributed to each member is very small, this leads to a result that the information of the injuried members is dispersed. and because the steps of the traditional fuzzy are so more that much useful information are lost in the evaluate process and lead to a incorrect result. there are no good solutions to this pr
大型復雜結構構件多，每個構件分配到的權重系數很小，導致損傷構件的信息在評判過程中被分散，同時由於傳統的模糊綜合評判方法步驟較多，在評判的過程中往往會丟失大量有用信息，造成最後的評判結果與實際情況相差較大，此問題沒有很好的解決辦法。 -
Fifthly, the paper utilize the fuzzy mathematics principle to analyse model setting up, model discerning, fuzzy decision - making process of fuzzy mathematics, the conclusion is drawn that we appraised mould cost with fuzzy similar comparative method, with fuzzy mathematics the expert ' s behavior is simulated as well as the useful information is drawn lastly, the fuzzy similar appraisal mathematics model on basic of man - hour method is set up, the characteristic factors to describe automobile covering of mould and coefficient of influence factor to synthetically judge similar work are confirmed which raises the precision of price by mathematics foundation, work characteristic sureness, influence factor sureness, management of sample data, etc. of weight of factor of model, the paper set up more intact theoretical system of mould price estimate with fuzzy similar comparative method
建立了基於工時法的模糊相似評價數學模型，確定了描述汽車覆蓋件模具的特徵因素；並確定了綜合評判工件相似性所用各影響因素的權重集合，提高了模具價格估計的精度。通過對數學模型的建立、工件特徵因素的確定、影響因素權重的確定、樣本數據的管理等的研究，本文較完整的建立了利用模糊相似比較方法估算模具價格的理論體系。在分析模具報價流程和決策過程的基礎上，開發了汽車覆蓋件模具計算機輔助報價系統，該系統安全、方便、準確。 -
Together, these three measures of body size, provide some very useful criteria against which to assess body weight and determine action targets, to maintain, lose weight or recognize and halt gradual weight gain
這三個指標為我們提供了十分有用的標準來評估體重，而且通過它們可以確定行動目標，以判斷是否應該維持體重減輕體重或者避免體重逐漸增加。 -
Mixed the exercise and diet may be the most useful way to lose weight
運動與節食結合也許是減肥最有效的途徑。 -
The concept of self - terminated sequence is introduced with some of its useful characteristics being proved and its relation with lowest weights of rsc being discovered. moreover, a very tight upper bound of the weight of the rsc is given
系統分析了採用自結尾序列分析交織器性能的方法，證明了其若干有用的性質，研究了一種級連交織器的設計。
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