population balance 中文意思是什麼

population balance 解釋
種群平衡
  • population : n. 1. 人口；人口總數；全體居民；人口的聚居。2. 物的全體[總數]；【生物學】蟲口；種群（量）；群體；族，組，個數；【統計學】對象總體，全域。3. 【物理學】布居；密度。4. 〈罕用語〉殖民。
  • balance : n 1 〈常作 a pair of balances〉 天平，秤。2 平衡，均衡，對稱；抵消；比較，對照，對比。3 （鐘表的...
  1. By making some assumptions, collision frequency were presented. then the the flocculation kinetics model was established through population balance equation. comparison of experimental data and modeling results indicate that there are the same trend between the two. so the model can predict floes number and size during flocculation of yellow river ' s loess particles without using empirical parameters. the tem and sem were used to obsever floes in the study of floe structure. the flocculation was divided as flocculi, floc and floe aggregate. the floes structure model was established by assumption that particles position in floe accords with tetrahedron. the fractal dimension of model and experimental floes was found to be coincidentso the model can reflect the structure of flocs formed in flocculation of yellow river ' s loess particles by macromolecule flocculant at a certain extent

    最後，本文還對絮凝動力學和絮體結構進行了研究，在前人研究的基礎上，針對高分子絮凝黃河泥沙，對絮凝過程作了一些符合試驗條件的假設，建立了顆粒碰撞頻率表達式，應用了顆粒數量平衡方程，從而建立了絮凝過程的動力學生長模型，模型計算結果與試驗數據對比表明，二者趨勢一致，在沒有使用經驗參數的情況下基本上能夠描述黃河泥沙絮凝過程中絮體數量和尺寸分佈的變化過程；對絮體結構的研究中，應用掃描電子顯微鏡和透射電子顯微鏡對絮體進行了觀察，將絮體分為絮粒、絮團和絮網三個不同的生長階段，通過假設顆粒結合位置符西安建築科技大學博士學位論文合正四面體，建立了絮體結構模型，計算得到的模型絮體分形維數基本與試驗中的實際絮體相符，在一定程度上能夠反映高分子絮凝黃河泥沙生成的絮體結構。
  2. ( 2 ) attach importance to the conservation of wintering area, keep the balance of wintering population, and reduce the press of preserving the genetic diversity of breeding populations

    （ 2 ）重視越冬地的保護，使越冬種群保持平穩，以減少對各地繁殖種群遺傳多樣性保持的壓力。
  3. With the rapid development of population and economy, water resource has been excessively exploited and the balance of ecosystem has been seriously changed and destroyed. the problem of water resource pollution and shortage is becoming more and more serious. the contradiction between exploitation water resource and environment is becoming more and more acute

    隨著人口與經濟的迅速發展，人類過度的開發水資源生態空間，生態系統的平衡受到了嚴重地改變和破壞，水環境污染和水資源短缺問題日益嚴重，水資源開發利用與生態環境的矛盾愈顯突出。
  4. The balance of the population and land and environmental disruption question that population growth cause facilitate the formulation of appropriate thoughts of people

    摘要人口與土地的平衡以及人口增長導致的環境破壞問題就促成了適度人口思想的產生。
  5. At the meeting of the beijing political consultative conference in january, pcc member and people ' s university professor zhang weiying put forward her ‘ opinions on establishing a population access system, controlling the size of the population and maintaining the balance of population and municipal resources ', which after media exposure became the focus of public attention

    在今年1月舉行的北京市政協會議上，北京市政協委、中國人民大學教授張惟英提出了《關于建立人口準入制度，控制人口規模，保持人口與城市資源平衡的建議》的提案，經媒體公開后，迅速成為了人們關注的焦點。
  6. He said the parasite is believed responsible for wiping out purple sea stars in north vancouver s indian arm and eliminating much of the male population of the species in other areas of british columbia, altering the balance of species

    萊頓說，這種寄生蟲據信對北溫哥華印第安灣紫海星的消失殆盡負有責任，它還使不列顛哥倫比亞省其他一些地區雄性海星的數量大量減少。
  7. He said the parasite is believed responsible for wiping out purple sea stars in north vancouver ' s indian arm and eliminating much of the male population of the species in other areas of british columbia, altering the balance of species

    萊頓說，這種寄生蟲據信對北溫哥華印第安灣紫海星的消失殆盡負有責任，它還使不列顛哥倫比亞省其他一些地區雄性海星的數量大量減少。
  8. With the rapidly development of minefield and the rapidly increase of coal output, the excavation scope and depth will extremely rise, the excavation work is under the overlying by the thin rock strata, and under the thick loose bed, the population in mine field will be more and more, the relevant basic industries will also develop rapidly. the mines will discharge more water from the underground, and the production and living will also consume more water. so the original water resource balance system in the minefield will be broken, the ecological environment formed by the nature will be destroyed in some degree

    隨著礦區迅速發展而煤炭產量的快速增長，既定在薄基巖厚鬆散層下的神東煤田開采范圍和深度勢必急劇增大，相應的人口也增加，與其相匹配的其它基礎工業一併迅猛發展，導致礦井外排水和生產生活用水直線猛增，這一系列生產和生活巨量用水必然會打破礦區原始的水資源平衡體系，不同程度的破壞自然形成的脆弱的生態環境。
  9. Wwf hong kong fears excessive tourism and recreational infrastructure development would create a negative impact on the natural environment and, with additional pressure from a potential population of 420, 000 on lantau island by the year 2011, the challenge now is how to achieve a balance between development and conservation

    世界自然基金會擔心過度發展旅遊活動及康樂設施會對自然環境造成負面影響加上至2011年，大嶼山更需面對預計42萬人口造成的壓力，因此，現時面臨的最大挑戰是確如何平衡發展與環保的需要。
  10. The main contents of this research are as follows : 1. sustainable agriculture development requests good production and resources reserve and achieving the balance in supply and demand and sound cycle of ecosystem to feed the increasing population

    主要研究結論為： （一）農業可持續發展，要求既增加生產，不斷保證日益增長的人類世代消費需要；又杜絕犧牲有限資源和破壞環境的不良行為，以保持資源的供需平衡和環境的良性循環。
  11. Finally, we pointed out that the ecological law of publishing ecology should be studied from all its different layers, i. e. the individual publishing media, the publishing population, the publishing community, and the publishing ecosystem, and the focus should be placed on publishing ecosystem for the purpose of exploring some approaches to improve publishing ecosystem, to protect publishing ecological balance, and to ensure the sustainable development of the publishing industry

    提出了出版生態學應當從個體、種群、群落和生態系統的層次研究出版生態規律，而以出版生態系統為研究重點，探索優化出版生態系統、保護出版生態平衡、保證出版業可持續發展的途徑。
  12. The analysis concern three aspects : the effects of population aging on pagy and funded pension system, the effects of population aging on the balance of pension finance, and the effects of population aging on the individual retirements benefit

    分析從幾個不同方面展開：首先是進行老齡化對現收現付制利基金制下的養老金收益影響分析；其次是進行老齡化對社會保障資金收支平衡影響效應的分析；最後是進行老齡化對個人養老收益性影響的分析。
  13. With self - regulation of antibodies, iga greatly improves the diversity of antibodies, achieves a good dynamic balance between individual diversity and population global convergence, and avoids getting into the local optimal solution

    免疫遺傳演算法通過抗體之間的相互激勵作用大大提高抗體的多樣性，動態調整群體收斂性和種群的多樣性之間的平衡，有良好的全局收斂能力和收斂速度。
  14. In face of this problem, the un population fund sounded a warning to the international community : lacking prompt and determined moves to control population and maintain a balance between consumption and development, the world population would be 12. 5 billion people by the middle of the next century and humanity will be unable to develop further

    聯合國人口基金為此向國際社會敲響警鐘：如不立即採取堅決行動控制人口，保持消費與發展的平衡，世界人口在下世紀中葉將達到125億，人類也將無法得到持續發展。
  15. The expressions of average value and variance of the phase difference and sum components are presented. we verified that under an appropriate condition the interference between the different transition processes makes counter balance, which induces the atom - field coupling system to be decoupled. the atomic population coherent trapping will take place

    模的相位保持隨機分佈，給出了光場兩個模相位差以及相位和的平均值與方差表達式，揭示了在適當的條件下，由於不同躍遷通道間的量于干涉效應，光場與原子退耦合，系統呈現原子布居數的相干俘獲現象。
  16. Thirdly, the paper analyzes the reasons of un - balance of demand and supply from the aspect of quality and construction, and argues that the situation of demand and supply is characterized by total surplus and structural deficiency. t he large scale of population and the high rate of labor participation lead to that the total supply surpass the demand. the capital structure, the improving technology and capital - dominance industrialization way result in the deficient demand, so they become the key reasons of unbalance situation

    再次，從總量和結構兩方面分析我國勞動力供求失衡的原因和影響因素，認為我國勞動力供求態勢的特徵是總量過剩與結構性短缺並存；從供給角度看，人口規模過大以及勞動參與率高是勞動力供給總量大於需求的主要原因：從需求角度看，資本構成、技術進步和資本深化的工業化方式是勞動力需求不足進而造成供求失衡的關鍵原因；改革前，我國勞動力就業結構轉移嚴重滯后，這與我國經濟發展戰略有密切聯系；改革后，產業結構調整使就業結構偏差得到一定的矯正，勞動力供求結構失衡的矛盾有所緩和。
  17. A basic question is what can be done to bring the world's food supply and its population into balance.

    它的根本問題是使世界上的食品供應與其人口保持平衡。
  18. This paper has analyzed the nature and quantitative description method of the carrying capacity of urban water resources system by means of the systematic study method. based on thought and theory of balance of water resource system, adopting systematic method to set up a model and forecast urban scale. this paper also has taken the city of kunming as an example to analyze water resources, population, water supply and drainage, economy development of kunming and forecast urban scale of kunming

    本文對城市水資源的開發利用狀況與城市發展規模的相互關系進行了研究，採用系統研究方法，對城市水資源承載力的實質、及定量表達方法做出了分析；應用水資源系統的平衡思想、水資源系統的平衡理論、水資源系統的平衡公式，取城市中的經濟、人口、城市降水地域等等資料，樹立水資源系統的平衡為根本的思想、應用科學的數理統計，以及水資源系統的平衡的科學地決策城市發展規模。
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